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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> |
1da177e4 | 69 | |
7c0f6ba6 | 70 | #include <linux/uaccess.h> |
1da177e4 LT |
71 | #include <asm/processor.h> |
72 | ||
29cbc78b AK |
73 | #ifdef CONFIG_X86 |
74 | #include <asm/nmi.h> | |
0741f4d2 | 75 | #include <asm/stacktrace.h> |
6e7c4025 | 76 | #include <asm/io.h> |
29cbc78b | 77 | #endif |
d550bbd4 DH |
78 | #ifdef CONFIG_SPARC |
79 | #include <asm/setup.h> | |
80 | #endif | |
c55b7c3e DY |
81 | #ifdef CONFIG_BSD_PROCESS_ACCT |
82 | #include <linux/acct.h> | |
83 | #endif | |
4f0e056f DY |
84 | #ifdef CONFIG_RT_MUTEXES |
85 | #include <linux/rtmutex.h> | |
86 | #endif | |
2edf5e49 DY |
87 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
88 | #include <linux/lockdep.h> | |
89 | #endif | |
15485a46 DY |
90 | #ifdef CONFIG_CHR_DEV_SG |
91 | #include <scsi/sg.h> | |
92 | #endif | |
29cbc78b | 93 | |
58687acb | 94 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
95 | #include <linux/nmi.h> |
96 | #endif | |
97 | ||
1da177e4 LT |
98 | #if defined(CONFIG_SYSCTL) |
99 | ||
100 | /* External variables not in a header file. */ | |
d6e71144 | 101 | extern int suid_dumpable; |
046d662f AK |
102 | #ifdef CONFIG_COREDUMP |
103 | extern int core_uses_pid; | |
1da177e4 | 104 | extern char core_pattern[]; |
a293980c | 105 | extern unsigned int core_pipe_limit; |
046d662f | 106 | #endif |
1da177e4 | 107 | extern int pid_max; |
1da177e4 | 108 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 109 | extern int percpu_pagelist_fraction; |
9745512c | 110 | extern int latencytop_enabled; |
9b80a184 | 111 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
112 | #ifndef CONFIG_MMU |
113 | extern int sysctl_nr_trim_pages; | |
114 | #endif | |
1da177e4 | 115 | |
c4f3b63f | 116 | /* Constants used for minimum and maximum */ |
2508ce18 | 117 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
118 | static int sixty = 60; |
119 | #endif | |
120 | ||
270750db AT |
121 | static int __maybe_unused neg_one = -1; |
122 | ||
c4f3b63f | 123 | static int zero; |
cd5f9a4c LT |
124 | static int __maybe_unused one = 1; |
125 | static int __maybe_unused two = 2; | |
5509a5d2 | 126 | static int __maybe_unused four = 4; |
fc3501d4 | 127 | static unsigned long one_ul = 1; |
c4f3b63f | 128 | static int one_hundred = 100; |
795ae7a0 | 129 | static int one_thousand = 1000; |
af91322e DY |
130 | #ifdef CONFIG_PRINTK |
131 | static int ten_thousand = 10000; | |
132 | #endif | |
c5dfd78e ACM |
133 | #ifdef CONFIG_PERF_EVENTS |
134 | static int six_hundred_forty_kb = 640 * 1024; | |
135 | #endif | |
c4f3b63f | 136 | |
9e4a5bda AR |
137 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
138 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
139 | ||
1da177e4 LT |
140 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
141 | static int maxolduid = 65535; | |
142 | static int minolduid; | |
143 | ||
144 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 145 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 146 | |
80df2847 LH |
147 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
148 | #ifdef CONFIG_DETECT_HUNG_TASK | |
149 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
150 | #endif | |
151 | ||
d14f1729 DY |
152 | #ifdef CONFIG_INOTIFY_USER |
153 | #include <linux/inotify.h> | |
154 | #endif | |
72c57ed5 | 155 | #ifdef CONFIG_SPARC |
1da177e4 LT |
156 | #endif |
157 | ||
158 | #ifdef __hppa__ | |
159 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
160 | #endif |
161 | ||
162 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
163 | extern int unaligned_enabled; |
164 | #endif | |
1da177e4 | 165 | |
d2b176ed | 166 | #ifdef CONFIG_IA64 |
88fc241f | 167 | extern int unaligned_dump_stack; |
d2b176ed JS |
168 | #endif |
169 | ||
b6fca725 VG |
170 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
171 | extern int no_unaligned_warning; | |
172 | #endif | |
173 | ||
d6f8ff73 | 174 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 175 | |
a19ac337 LR |
176 | /** |
177 | * enum sysctl_writes_mode - supported sysctl write modes | |
178 | * | |
179 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
180 | * to be written, and multiple writes on the same sysctl file descriptor | |
181 | * will rewrite the sysctl value, regardless of file position. No warning | |
182 | * is issued when the initial position is not 0. | |
183 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
184 | * not 0. | |
185 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
186 | * file position 0 and the value must be fully contained in the buffer | |
187 | * sent to the write syscall. If dealing with strings respect the file | |
188 | * position, but restrict this to the max length of the buffer, anything | |
189 | * passed the max lenght will be ignored. Multiple writes will append | |
190 | * to the buffer. | |
191 | * | |
192 | * These write modes control how current file position affects the behavior of | |
193 | * updating sysctl values through the proc interface on each write. | |
194 | */ | |
195 | enum sysctl_writes_mode { | |
196 | SYSCTL_WRITES_LEGACY = -1, | |
197 | SYSCTL_WRITES_WARN = 0, | |
198 | SYSCTL_WRITES_STRICT = 1, | |
199 | }; | |
f4aacea2 | 200 | |
a19ac337 | 201 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 202 | |
8d65af78 | 203 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 204 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 205 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 206 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 207 | #endif |
9ec52099 | 208 | |
bfdc0b49 | 209 | #ifdef CONFIG_PRINTK |
620f6e8e | 210 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
211 | void __user *buffer, size_t *lenp, loff_t *ppos); |
212 | #endif | |
213 | ||
54b50199 KC |
214 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
215 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 216 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
217 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
218 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 219 | #endif |
54b50199 | 220 | |
97f5f0cd | 221 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 222 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 223 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 224 | |
6f8fd1d7 | 225 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
226 | void __user *buffer, size_t *lenp, |
227 | loff_t *ppos) | |
228 | { | |
229 | int error; | |
230 | ||
231 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
232 | if (error) | |
233 | return error; | |
234 | ||
235 | if (write) | |
236 | sysrq_toggle_support(__sysrq_enabled); | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | #endif | |
242 | ||
d8217f07 EB |
243 | static struct ctl_table kern_table[]; |
244 | static struct ctl_table vm_table[]; | |
245 | static struct ctl_table fs_table[]; | |
246 | static struct ctl_table debug_table[]; | |
247 | static struct ctl_table dev_table[]; | |
248 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
249 | #ifdef CONFIG_EPOLL |
250 | extern struct ctl_table epoll_table[]; | |
251 | #endif | |
1da177e4 LT |
252 | |
253 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
254 | int sysctl_legacy_va_layout; | |
255 | #endif | |
256 | ||
1da177e4 LT |
257 | /* The default sysctl tables: */ |
258 | ||
de4e83bd | 259 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 260 | { |
1da177e4 LT |
261 | .procname = "kernel", |
262 | .mode = 0555, | |
263 | .child = kern_table, | |
264 | }, | |
265 | { | |
1da177e4 LT |
266 | .procname = "vm", |
267 | .mode = 0555, | |
268 | .child = vm_table, | |
269 | }, | |
1da177e4 | 270 | { |
1da177e4 LT |
271 | .procname = "fs", |
272 | .mode = 0555, | |
273 | .child = fs_table, | |
274 | }, | |
275 | { | |
1da177e4 LT |
276 | .procname = "debug", |
277 | .mode = 0555, | |
278 | .child = debug_table, | |
279 | }, | |
280 | { | |
1da177e4 LT |
281 | .procname = "dev", |
282 | .mode = 0555, | |
283 | .child = dev_table, | |
284 | }, | |
6fce56ec | 285 | { } |
1da177e4 LT |
286 | }; |
287 | ||
77e54a1f | 288 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
289 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
290 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
291 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
292 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 293 | #ifdef CONFIG_SMP |
1983a922 CE |
294 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
295 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
296 | #endif /* CONFIG_SMP */ |
297 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 298 | |
5e771905 MG |
299 | #ifdef CONFIG_COMPACTION |
300 | static int min_extfrag_threshold; | |
301 | static int max_extfrag_threshold = 1000; | |
302 | #endif | |
303 | ||
d8217f07 | 304 | static struct ctl_table kern_table[] = { |
2bba22c5 | 305 | { |
2bba22c5 MG |
306 | .procname = "sched_child_runs_first", |
307 | .data = &sysctl_sched_child_runs_first, | |
308 | .maxlen = sizeof(unsigned int), | |
309 | .mode = 0644, | |
6d456111 | 310 | .proc_handler = proc_dointvec, |
2bba22c5 | 311 | }, |
77e54a1f IM |
312 | #ifdef CONFIG_SCHED_DEBUG |
313 | { | |
b2be5e96 PZ |
314 | .procname = "sched_min_granularity_ns", |
315 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
316 | .maxlen = sizeof(unsigned int), |
317 | .mode = 0644, | |
702a7c76 | 318 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
319 | .extra1 = &min_sched_granularity_ns, |
320 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 321 | }, |
21805085 | 322 | { |
21805085 PZ |
323 | .procname = "sched_latency_ns", |
324 | .data = &sysctl_sched_latency, | |
325 | .maxlen = sizeof(unsigned int), | |
326 | .mode = 0644, | |
702a7c76 | 327 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
328 | .extra1 = &min_sched_granularity_ns, |
329 | .extra2 = &max_sched_granularity_ns, | |
330 | }, | |
77e54a1f | 331 | { |
77e54a1f IM |
332 | .procname = "sched_wakeup_granularity_ns", |
333 | .data = &sysctl_sched_wakeup_granularity, | |
334 | .maxlen = sizeof(unsigned int), | |
335 | .mode = 0644, | |
702a7c76 | 336 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
337 | .extra1 = &min_wakeup_granularity_ns, |
338 | .extra2 = &max_wakeup_granularity_ns, | |
339 | }, | |
cbee9f88 | 340 | #ifdef CONFIG_SMP |
1983a922 | 341 | { |
1983a922 CE |
342 | .procname = "sched_tunable_scaling", |
343 | .data = &sysctl_sched_tunable_scaling, | |
344 | .maxlen = sizeof(enum sched_tunable_scaling), | |
345 | .mode = 0644, | |
702a7c76 | 346 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
347 | .extra1 = &min_sched_tunable_scaling, |
348 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 349 | }, |
da84d961 | 350 | { |
d00535db | 351 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
352 | .data = &sysctl_sched_migration_cost, |
353 | .maxlen = sizeof(unsigned int), | |
354 | .mode = 0644, | |
6d456111 | 355 | .proc_handler = proc_dointvec, |
da84d961 | 356 | }, |
b82d9fdd | 357 | { |
b82d9fdd PZ |
358 | .procname = "sched_nr_migrate", |
359 | .data = &sysctl_sched_nr_migrate, | |
360 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 361 | .mode = 0644, |
6d456111 | 362 | .proc_handler = proc_dointvec, |
fa85ae24 | 363 | }, |
e9e9250b | 364 | { |
d00535db | 365 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
366 | .data = &sysctl_sched_time_avg, |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
5ccba44b EZ |
369 | .proc_handler = proc_dointvec_minmax, |
370 | .extra1 = &one, | |
e9e9250b | 371 | }, |
cb251765 MG |
372 | #ifdef CONFIG_SCHEDSTATS |
373 | { | |
374 | .procname = "sched_schedstats", | |
375 | .data = NULL, | |
376 | .maxlen = sizeof(unsigned int), | |
377 | .mode = 0644, | |
378 | .proc_handler = sysctl_schedstats, | |
379 | .extra1 = &zero, | |
380 | .extra2 = &one, | |
381 | }, | |
382 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
383 | #endif /* CONFIG_SMP */ |
384 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
385 | { |
386 | .procname = "numa_balancing_scan_delay_ms", | |
387 | .data = &sysctl_numa_balancing_scan_delay, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
390 | .proc_handler = proc_dointvec, | |
391 | }, | |
cbee9f88 PZ |
392 | { |
393 | .procname = "numa_balancing_scan_period_min_ms", | |
394 | .data = &sysctl_numa_balancing_scan_period_min, | |
395 | .maxlen = sizeof(unsigned int), | |
396 | .mode = 0644, | |
397 | .proc_handler = proc_dointvec, | |
398 | }, | |
399 | { | |
400 | .procname = "numa_balancing_scan_period_max_ms", | |
401 | .data = &sysctl_numa_balancing_scan_period_max, | |
402 | .maxlen = sizeof(unsigned int), | |
403 | .mode = 0644, | |
404 | .proc_handler = proc_dointvec, | |
405 | }, | |
6e5fb223 PZ |
406 | { |
407 | .procname = "numa_balancing_scan_size_mb", | |
408 | .data = &sysctl_numa_balancing_scan_size, | |
409 | .maxlen = sizeof(unsigned int), | |
410 | .mode = 0644, | |
64192658 KT |
411 | .proc_handler = proc_dointvec_minmax, |
412 | .extra1 = &one, | |
6e5fb223 | 413 | }, |
54a43d54 AK |
414 | { |
415 | .procname = "numa_balancing", | |
416 | .data = NULL, /* filled in by handler */ | |
417 | .maxlen = sizeof(unsigned int), | |
418 | .mode = 0644, | |
419 | .proc_handler = sysctl_numa_balancing, | |
420 | .extra1 = &zero, | |
421 | .extra2 = &one, | |
422 | }, | |
cbee9f88 PZ |
423 | #endif /* CONFIG_NUMA_BALANCING */ |
424 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 425 | { |
9f0c1e56 PZ |
426 | .procname = "sched_rt_period_us", |
427 | .data = &sysctl_sched_rt_period, | |
428 | .maxlen = sizeof(unsigned int), | |
429 | .mode = 0644, | |
6d456111 | 430 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
431 | }, |
432 | { | |
9f0c1e56 PZ |
433 | .procname = "sched_rt_runtime_us", |
434 | .data = &sysctl_sched_rt_runtime, | |
435 | .maxlen = sizeof(int), | |
436 | .mode = 0644, | |
6d456111 | 437 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 438 | }, |
ce0dbbbb CW |
439 | { |
440 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 441 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
442 | .maxlen = sizeof(int), |
443 | .mode = 0644, | |
444 | .proc_handler = sched_rr_handler, | |
445 | }, | |
5091faa4 MG |
446 | #ifdef CONFIG_SCHED_AUTOGROUP |
447 | { | |
448 | .procname = "sched_autogroup_enabled", | |
449 | .data = &sysctl_sched_autogroup_enabled, | |
450 | .maxlen = sizeof(unsigned int), | |
451 | .mode = 0644, | |
1747b21f | 452 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
453 | .extra1 = &zero, |
454 | .extra2 = &one, | |
455 | }, | |
456 | #endif | |
ec12cb7f PT |
457 | #ifdef CONFIG_CFS_BANDWIDTH |
458 | { | |
459 | .procname = "sched_cfs_bandwidth_slice_us", | |
460 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
461 | .maxlen = sizeof(unsigned int), | |
462 | .mode = 0644, | |
463 | .proc_handler = proc_dointvec_minmax, | |
464 | .extra1 = &one, | |
465 | }, | |
466 | #endif | |
f20786ff PZ |
467 | #ifdef CONFIG_PROVE_LOCKING |
468 | { | |
f20786ff PZ |
469 | .procname = "prove_locking", |
470 | .data = &prove_locking, | |
471 | .maxlen = sizeof(int), | |
472 | .mode = 0644, | |
6d456111 | 473 | .proc_handler = proc_dointvec, |
f20786ff PZ |
474 | }, |
475 | #endif | |
476 | #ifdef CONFIG_LOCK_STAT | |
477 | { | |
f20786ff PZ |
478 | .procname = "lock_stat", |
479 | .data = &lock_stat, | |
480 | .maxlen = sizeof(int), | |
481 | .mode = 0644, | |
6d456111 | 482 | .proc_handler = proc_dointvec, |
f20786ff | 483 | }, |
77e54a1f | 484 | #endif |
1da177e4 | 485 | { |
1da177e4 LT |
486 | .procname = "panic", |
487 | .data = &panic_timeout, | |
488 | .maxlen = sizeof(int), | |
489 | .mode = 0644, | |
6d456111 | 490 | .proc_handler = proc_dointvec, |
1da177e4 | 491 | }, |
046d662f | 492 | #ifdef CONFIG_COREDUMP |
1da177e4 | 493 | { |
1da177e4 LT |
494 | .procname = "core_uses_pid", |
495 | .data = &core_uses_pid, | |
496 | .maxlen = sizeof(int), | |
497 | .mode = 0644, | |
6d456111 | 498 | .proc_handler = proc_dointvec, |
1da177e4 LT |
499 | }, |
500 | { | |
1da177e4 LT |
501 | .procname = "core_pattern", |
502 | .data = core_pattern, | |
71ce92f3 | 503 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 504 | .mode = 0644, |
54b50199 | 505 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 506 | }, |
a293980c | 507 | { |
a293980c NH |
508 | .procname = "core_pipe_limit", |
509 | .data = &core_pipe_limit, | |
510 | .maxlen = sizeof(unsigned int), | |
511 | .mode = 0644, | |
6d456111 | 512 | .proc_handler = proc_dointvec, |
a293980c | 513 | }, |
046d662f | 514 | #endif |
34f5a398 | 515 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 516 | { |
1da177e4 | 517 | .procname = "tainted", |
25ddbb18 | 518 | .maxlen = sizeof(long), |
34f5a398 | 519 | .mode = 0644, |
6d456111 | 520 | .proc_handler = proc_taint, |
1da177e4 | 521 | }, |
f4aacea2 KC |
522 | { |
523 | .procname = "sysctl_writes_strict", | |
524 | .data = &sysctl_writes_strict, | |
525 | .maxlen = sizeof(int), | |
526 | .mode = 0644, | |
527 | .proc_handler = proc_dointvec_minmax, | |
528 | .extra1 = &neg_one, | |
529 | .extra2 = &one, | |
530 | }, | |
34f5a398 | 531 | #endif |
9745512c AV |
532 | #ifdef CONFIG_LATENCYTOP |
533 | { | |
534 | .procname = "latencytop", | |
535 | .data = &latencytop_enabled, | |
536 | .maxlen = sizeof(int), | |
537 | .mode = 0644, | |
cb251765 | 538 | .proc_handler = sysctl_latencytop, |
9745512c AV |
539 | }, |
540 | #endif | |
1da177e4 LT |
541 | #ifdef CONFIG_BLK_DEV_INITRD |
542 | { | |
1da177e4 LT |
543 | .procname = "real-root-dev", |
544 | .data = &real_root_dev, | |
545 | .maxlen = sizeof(int), | |
546 | .mode = 0644, | |
6d456111 | 547 | .proc_handler = proc_dointvec, |
1da177e4 LT |
548 | }, |
549 | #endif | |
45807a1d | 550 | { |
45807a1d IM |
551 | .procname = "print-fatal-signals", |
552 | .data = &print_fatal_signals, | |
553 | .maxlen = sizeof(int), | |
554 | .mode = 0644, | |
6d456111 | 555 | .proc_handler = proc_dointvec, |
45807a1d | 556 | }, |
72c57ed5 | 557 | #ifdef CONFIG_SPARC |
1da177e4 | 558 | { |
1da177e4 LT |
559 | .procname = "reboot-cmd", |
560 | .data = reboot_command, | |
561 | .maxlen = 256, | |
562 | .mode = 0644, | |
6d456111 | 563 | .proc_handler = proc_dostring, |
1da177e4 LT |
564 | }, |
565 | { | |
1da177e4 LT |
566 | .procname = "stop-a", |
567 | .data = &stop_a_enabled, | |
568 | .maxlen = sizeof (int), | |
569 | .mode = 0644, | |
6d456111 | 570 | .proc_handler = proc_dointvec, |
1da177e4 LT |
571 | }, |
572 | { | |
1da177e4 LT |
573 | .procname = "scons-poweroff", |
574 | .data = &scons_pwroff, | |
575 | .maxlen = sizeof (int), | |
576 | .mode = 0644, | |
6d456111 | 577 | .proc_handler = proc_dointvec, |
1da177e4 LT |
578 | }, |
579 | #endif | |
0871420f DM |
580 | #ifdef CONFIG_SPARC64 |
581 | { | |
0871420f DM |
582 | .procname = "tsb-ratio", |
583 | .data = &sysctl_tsb_ratio, | |
584 | .maxlen = sizeof (int), | |
585 | .mode = 0644, | |
6d456111 | 586 | .proc_handler = proc_dointvec, |
0871420f DM |
587 | }, |
588 | #endif | |
1da177e4 LT |
589 | #ifdef __hppa__ |
590 | { | |
1da177e4 LT |
591 | .procname = "soft-power", |
592 | .data = &pwrsw_enabled, | |
593 | .maxlen = sizeof (int), | |
594 | .mode = 0644, | |
6d456111 | 595 | .proc_handler = proc_dointvec, |
1da177e4 | 596 | }, |
bf14e3b9 VG |
597 | #endif |
598 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 599 | { |
1da177e4 LT |
600 | .procname = "unaligned-trap", |
601 | .data = &unaligned_enabled, | |
602 | .maxlen = sizeof (int), | |
603 | .mode = 0644, | |
6d456111 | 604 | .proc_handler = proc_dointvec, |
1da177e4 LT |
605 | }, |
606 | #endif | |
607 | { | |
1da177e4 LT |
608 | .procname = "ctrl-alt-del", |
609 | .data = &C_A_D, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
6d456111 | 612 | .proc_handler = proc_dointvec, |
1da177e4 | 613 | }, |
606576ce | 614 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 615 | { |
b0fc494f SR |
616 | .procname = "ftrace_enabled", |
617 | .data = &ftrace_enabled, | |
618 | .maxlen = sizeof(int), | |
619 | .mode = 0644, | |
6d456111 | 620 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
621 | }, |
622 | #endif | |
f38f1d2a SR |
623 | #ifdef CONFIG_STACK_TRACER |
624 | { | |
f38f1d2a SR |
625 | .procname = "stack_tracer_enabled", |
626 | .data = &stack_tracer_enabled, | |
627 | .maxlen = sizeof(int), | |
628 | .mode = 0644, | |
6d456111 | 629 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
630 | }, |
631 | #endif | |
944ac425 SR |
632 | #ifdef CONFIG_TRACING |
633 | { | |
3299b4dd | 634 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
635 | .data = &ftrace_dump_on_oops, |
636 | .maxlen = sizeof(int), | |
637 | .mode = 0644, | |
6d456111 | 638 | .proc_handler = proc_dointvec, |
944ac425 | 639 | }, |
de7edd31 SRRH |
640 | { |
641 | .procname = "traceoff_on_warning", | |
642 | .data = &__disable_trace_on_warning, | |
643 | .maxlen = sizeof(__disable_trace_on_warning), | |
644 | .mode = 0644, | |
645 | .proc_handler = proc_dointvec, | |
646 | }, | |
0daa2302 SRRH |
647 | { |
648 | .procname = "tracepoint_printk", | |
649 | .data = &tracepoint_printk, | |
650 | .maxlen = sizeof(tracepoint_printk), | |
651 | .mode = 0644, | |
42391745 | 652 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 653 | }, |
944ac425 | 654 | #endif |
2965faa5 | 655 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
656 | { |
657 | .procname = "kexec_load_disabled", | |
658 | .data = &kexec_load_disabled, | |
659 | .maxlen = sizeof(int), | |
660 | .mode = 0644, | |
661 | /* only handle a transition from default "0" to "1" */ | |
662 | .proc_handler = proc_dointvec_minmax, | |
663 | .extra1 = &one, | |
664 | .extra2 = &one, | |
665 | }, | |
666 | #endif | |
a1ef5adb | 667 | #ifdef CONFIG_MODULES |
1da177e4 | 668 | { |
1da177e4 LT |
669 | .procname = "modprobe", |
670 | .data = &modprobe_path, | |
671 | .maxlen = KMOD_PATH_LEN, | |
672 | .mode = 0644, | |
6d456111 | 673 | .proc_handler = proc_dostring, |
1da177e4 | 674 | }, |
3d43321b | 675 | { |
3d43321b KC |
676 | .procname = "modules_disabled", |
677 | .data = &modules_disabled, | |
678 | .maxlen = sizeof(int), | |
679 | .mode = 0644, | |
680 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 681 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
682 | .extra1 = &one, |
683 | .extra2 = &one, | |
684 | }, | |
1da177e4 | 685 | #endif |
86d56134 | 686 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 687 | { |
1da177e4 | 688 | .procname = "hotplug", |
312c004d KS |
689 | .data = &uevent_helper, |
690 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 691 | .mode = 0644, |
6d456111 | 692 | .proc_handler = proc_dostring, |
1da177e4 | 693 | }, |
86d56134 | 694 | #endif |
1da177e4 LT |
695 | #ifdef CONFIG_CHR_DEV_SG |
696 | { | |
1da177e4 LT |
697 | .procname = "sg-big-buff", |
698 | .data = &sg_big_buff, | |
699 | .maxlen = sizeof (int), | |
700 | .mode = 0444, | |
6d456111 | 701 | .proc_handler = proc_dointvec, |
1da177e4 LT |
702 | }, |
703 | #endif | |
704 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
705 | { | |
1da177e4 LT |
706 | .procname = "acct", |
707 | .data = &acct_parm, | |
708 | .maxlen = 3*sizeof(int), | |
709 | .mode = 0644, | |
6d456111 | 710 | .proc_handler = proc_dointvec, |
1da177e4 LT |
711 | }, |
712 | #endif | |
1da177e4 LT |
713 | #ifdef CONFIG_MAGIC_SYSRQ |
714 | { | |
1da177e4 | 715 | .procname = "sysrq", |
5d6f647f | 716 | .data = &__sysrq_enabled, |
1da177e4 LT |
717 | .maxlen = sizeof (int), |
718 | .mode = 0644, | |
97f5f0cd | 719 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
720 | }, |
721 | #endif | |
d6f8ff73 | 722 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 723 | { |
1da177e4 | 724 | .procname = "cad_pid", |
9ec52099 | 725 | .data = NULL, |
1da177e4 LT |
726 | .maxlen = sizeof (int), |
727 | .mode = 0600, | |
6d456111 | 728 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 729 | }, |
d6f8ff73 | 730 | #endif |
1da177e4 | 731 | { |
1da177e4 | 732 | .procname = "threads-max", |
16db3d3f | 733 | .data = NULL, |
1da177e4 LT |
734 | .maxlen = sizeof(int), |
735 | .mode = 0644, | |
16db3d3f | 736 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
737 | }, |
738 | { | |
1da177e4 LT |
739 | .procname = "random", |
740 | .mode = 0555, | |
741 | .child = random_table, | |
742 | }, | |
17f60a7d EP |
743 | { |
744 | .procname = "usermodehelper", | |
745 | .mode = 0555, | |
746 | .child = usermodehelper_table, | |
747 | }, | |
1da177e4 | 748 | { |
1da177e4 LT |
749 | .procname = "overflowuid", |
750 | .data = &overflowuid, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
754 | .extra1 = &minolduid, |
755 | .extra2 = &maxolduid, | |
756 | }, | |
757 | { | |
1da177e4 LT |
758 | .procname = "overflowgid", |
759 | .data = &overflowgid, | |
760 | .maxlen = sizeof(int), | |
761 | .mode = 0644, | |
6d456111 | 762 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
763 | .extra1 = &minolduid, |
764 | .extra2 = &maxolduid, | |
765 | }, | |
347a8dc3 | 766 | #ifdef CONFIG_S390 |
1da177e4 LT |
767 | #ifdef CONFIG_MATHEMU |
768 | { | |
1da177e4 LT |
769 | .procname = "ieee_emulation_warnings", |
770 | .data = &sysctl_ieee_emulation_warnings, | |
771 | .maxlen = sizeof(int), | |
772 | .mode = 0644, | |
6d456111 | 773 | .proc_handler = proc_dointvec, |
1da177e4 | 774 | }, |
1da177e4 LT |
775 | #endif |
776 | { | |
1da177e4 | 777 | .procname = "userprocess_debug", |
ab3c68ee | 778 | .data = &show_unhandled_signals, |
1da177e4 LT |
779 | .maxlen = sizeof(int), |
780 | .mode = 0644, | |
6d456111 | 781 | .proc_handler = proc_dointvec, |
1da177e4 LT |
782 | }, |
783 | #endif | |
784 | { | |
1da177e4 LT |
785 | .procname = "pid_max", |
786 | .data = &pid_max, | |
787 | .maxlen = sizeof (int), | |
788 | .mode = 0644, | |
6d456111 | 789 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
790 | .extra1 = &pid_max_min, |
791 | .extra2 = &pid_max_max, | |
792 | }, | |
793 | { | |
1da177e4 LT |
794 | .procname = "panic_on_oops", |
795 | .data = &panic_on_oops, | |
796 | .maxlen = sizeof(int), | |
797 | .mode = 0644, | |
6d456111 | 798 | .proc_handler = proc_dointvec, |
1da177e4 | 799 | }, |
7ef3d2fd JP |
800 | #if defined CONFIG_PRINTK |
801 | { | |
7ef3d2fd JP |
802 | .procname = "printk", |
803 | .data = &console_loglevel, | |
804 | .maxlen = 4*sizeof(int), | |
805 | .mode = 0644, | |
6d456111 | 806 | .proc_handler = proc_dointvec, |
7ef3d2fd | 807 | }, |
1da177e4 | 808 | { |
1da177e4 | 809 | .procname = "printk_ratelimit", |
717115e1 | 810 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
811 | .maxlen = sizeof(int), |
812 | .mode = 0644, | |
6d456111 | 813 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
814 | }, |
815 | { | |
1da177e4 | 816 | .procname = "printk_ratelimit_burst", |
717115e1 | 817 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
818 | .maxlen = sizeof(int), |
819 | .mode = 0644, | |
6d456111 | 820 | .proc_handler = proc_dointvec, |
1da177e4 | 821 | }, |
af91322e | 822 | { |
af91322e DY |
823 | .procname = "printk_delay", |
824 | .data = &printk_delay_msec, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
6d456111 | 827 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
828 | .extra1 = &zero, |
829 | .extra2 = &ten_thousand, | |
830 | }, | |
750afe7b BP |
831 | { |
832 | .procname = "printk_devkmsg", | |
833 | .data = devkmsg_log_str, | |
834 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
835 | .mode = 0644, | |
836 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
837 | }, | |
eaf06b24 DR |
838 | { |
839 | .procname = "dmesg_restrict", | |
840 | .data = &dmesg_restrict, | |
841 | .maxlen = sizeof(int), | |
842 | .mode = 0644, | |
620f6e8e | 843 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
844 | .extra1 = &zero, |
845 | .extra2 = &one, | |
846 | }, | |
455cd5ab DR |
847 | { |
848 | .procname = "kptr_restrict", | |
849 | .data = &kptr_restrict, | |
850 | .maxlen = sizeof(int), | |
851 | .mode = 0644, | |
620f6e8e | 852 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
853 | .extra1 = &zero, |
854 | .extra2 = &two, | |
855 | }, | |
df6e61d4 | 856 | #endif |
1da177e4 | 857 | { |
1da177e4 LT |
858 | .procname = "ngroups_max", |
859 | .data = &ngroups_max, | |
860 | .maxlen = sizeof (int), | |
861 | .mode = 0444, | |
6d456111 | 862 | .proc_handler = proc_dointvec, |
1da177e4 | 863 | }, |
73efc039 DB |
864 | { |
865 | .procname = "cap_last_cap", | |
866 | .data = (void *)&cap_last_cap, | |
867 | .maxlen = sizeof(int), | |
868 | .mode = 0444, | |
869 | .proc_handler = proc_dointvec, | |
870 | }, | |
58687acb | 871 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 872 | { |
58687acb | 873 | .procname = "watchdog", |
7feeb9cd TG |
874 | .data = &watchdog_user_enabled, |
875 | .maxlen = sizeof(int), | |
876 | .mode = 0644, | |
195daf66 | 877 | .proc_handler = proc_watchdog, |
586692a5 MSB |
878 | .extra1 = &zero, |
879 | .extra2 = &one, | |
58687acb DZ |
880 | }, |
881 | { | |
882 | .procname = "watchdog_thresh", | |
586692a5 | 883 | .data = &watchdog_thresh, |
58687acb DZ |
884 | .maxlen = sizeof(int), |
885 | .mode = 0644, | |
195daf66 | 886 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 887 | .extra1 = &zero, |
58687acb | 888 | .extra2 = &sixty, |
504d7cf1 | 889 | }, |
195daf66 UO |
890 | { |
891 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
892 | .data = &nmi_watchdog_user_enabled, |
893 | .maxlen = sizeof(int), | |
51d4052b | 894 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
895 | .proc_handler = proc_nmi_watchdog, |
896 | .extra1 = &zero, | |
195daf66 | 897 | .extra2 = &one, |
195daf66 | 898 | }, |
05a4a952 NP |
899 | { |
900 | .procname = "watchdog_cpumask", | |
901 | .data = &watchdog_cpumask_bits, | |
902 | .maxlen = NR_CPUS, | |
903 | .mode = 0644, | |
904 | .proc_handler = proc_watchdog_cpumask, | |
905 | }, | |
906 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
907 | { |
908 | .procname = "soft_watchdog", | |
7feeb9cd TG |
909 | .data = &soft_watchdog_user_enabled, |
910 | .maxlen = sizeof(int), | |
911 | .mode = 0644, | |
195daf66 UO |
912 | .proc_handler = proc_soft_watchdog, |
913 | .extra1 = &zero, | |
914 | .extra2 = &one, | |
915 | }, | |
2508ce18 DZ |
916 | { |
917 | .procname = "softlockup_panic", | |
918 | .data = &softlockup_panic, | |
919 | .maxlen = sizeof(int), | |
920 | .mode = 0644, | |
921 | .proc_handler = proc_dointvec_minmax, | |
922 | .extra1 = &zero, | |
923 | .extra2 = &one, | |
924 | }, | |
05a4a952 | 925 | #ifdef CONFIG_SMP |
ac1f5912 | 926 | { |
05a4a952 NP |
927 | .procname = "softlockup_all_cpu_backtrace", |
928 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
929 | .maxlen = sizeof(int), |
930 | .mode = 0644, | |
931 | .proc_handler = proc_dointvec_minmax, | |
932 | .extra1 = &zero, | |
933 | .extra2 = &one, | |
934 | }, | |
05a4a952 | 935 | #endif /* CONFIG_SMP */ |
ac1f5912 | 936 | #endif |
05a4a952 | 937 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 938 | { |
05a4a952 NP |
939 | .procname = "hardlockup_panic", |
940 | .data = &hardlockup_panic, | |
ed235875 AT |
941 | .maxlen = sizeof(int), |
942 | .mode = 0644, | |
943 | .proc_handler = proc_dointvec_minmax, | |
944 | .extra1 = &zero, | |
945 | .extra2 = &one, | |
946 | }, | |
05a4a952 | 947 | #ifdef CONFIG_SMP |
55537871 JK |
948 | { |
949 | .procname = "hardlockup_all_cpu_backtrace", | |
950 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
951 | .maxlen = sizeof(int), | |
952 | .mode = 0644, | |
953 | .proc_handler = proc_dointvec_minmax, | |
954 | .extra1 = &zero, | |
955 | .extra2 = &one, | |
956 | }, | |
ed235875 | 957 | #endif /* CONFIG_SMP */ |
5dc30558 | 958 | #endif |
05a4a952 NP |
959 | #endif |
960 | ||
5dc30558 DZ |
961 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
962 | { | |
963 | .procname = "unknown_nmi_panic", | |
964 | .data = &unknown_nmi_panic, | |
965 | .maxlen = sizeof (int), | |
966 | .mode = 0644, | |
967 | .proc_handler = proc_dointvec, | |
968 | }, | |
504d7cf1 | 969 | #endif |
1da177e4 | 970 | #if defined(CONFIG_X86) |
8da5adda | 971 | { |
8da5adda DZ |
972 | .procname = "panic_on_unrecovered_nmi", |
973 | .data = &panic_on_unrecovered_nmi, | |
974 | .maxlen = sizeof(int), | |
975 | .mode = 0644, | |
6d456111 | 976 | .proc_handler = proc_dointvec, |
8da5adda | 977 | }, |
5211a242 | 978 | { |
5211a242 KG |
979 | .procname = "panic_on_io_nmi", |
980 | .data = &panic_on_io_nmi, | |
981 | .maxlen = sizeof(int), | |
982 | .mode = 0644, | |
6d456111 | 983 | .proc_handler = proc_dointvec, |
5211a242 | 984 | }, |
55af7796 MH |
985 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
986 | { | |
987 | .procname = "panic_on_stackoverflow", | |
988 | .data = &sysctl_panic_on_stackoverflow, | |
989 | .maxlen = sizeof(int), | |
990 | .mode = 0644, | |
991 | .proc_handler = proc_dointvec, | |
992 | }, | |
993 | #endif | |
1da177e4 | 994 | { |
1da177e4 LT |
995 | .procname = "bootloader_type", |
996 | .data = &bootloader_type, | |
997 | .maxlen = sizeof (int), | |
998 | .mode = 0444, | |
6d456111 | 999 | .proc_handler = proc_dointvec, |
1da177e4 | 1000 | }, |
5031296c | 1001 | { |
5031296c PA |
1002 | .procname = "bootloader_version", |
1003 | .data = &bootloader_version, | |
1004 | .maxlen = sizeof (int), | |
1005 | .mode = 0444, | |
6d456111 | 1006 | .proc_handler = proc_dointvec, |
5031296c | 1007 | }, |
6e7c4025 | 1008 | { |
6e7c4025 IM |
1009 | .procname = "io_delay_type", |
1010 | .data = &io_delay_type, | |
1011 | .maxlen = sizeof(int), | |
1012 | .mode = 0644, | |
6d456111 | 1013 | .proc_handler = proc_dointvec, |
6e7c4025 | 1014 | }, |
1da177e4 | 1015 | #endif |
7a9166e3 | 1016 | #if defined(CONFIG_MMU) |
1da177e4 | 1017 | { |
1da177e4 LT |
1018 | .procname = "randomize_va_space", |
1019 | .data = &randomize_va_space, | |
1020 | .maxlen = sizeof(int), | |
1021 | .mode = 0644, | |
6d456111 | 1022 | .proc_handler = proc_dointvec, |
1da177e4 | 1023 | }, |
7a9166e3 | 1024 | #endif |
0152fb37 | 1025 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1026 | { |
951f22d5 MS |
1027 | .procname = "spin_retry", |
1028 | .data = &spin_retry, | |
1029 | .maxlen = sizeof (int), | |
1030 | .mode = 0644, | |
6d456111 | 1031 | .proc_handler = proc_dointvec, |
951f22d5 | 1032 | }, |
c255d844 | 1033 | #endif |
673d5b43 | 1034 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1035 | { |
c255d844 | 1036 | .procname = "acpi_video_flags", |
77afcf78 | 1037 | .data = &acpi_realmode_flags, |
c255d844 PM |
1038 | .maxlen = sizeof (unsigned long), |
1039 | .mode = 0644, | |
6d456111 | 1040 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1041 | }, |
d2b176ed | 1042 | #endif |
b6fca725 | 1043 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1044 | { |
d2b176ed JS |
1045 | .procname = "ignore-unaligned-usertrap", |
1046 | .data = &no_unaligned_warning, | |
1047 | .maxlen = sizeof (int), | |
1048 | .mode = 0644, | |
6d456111 | 1049 | .proc_handler = proc_dointvec, |
d2b176ed | 1050 | }, |
b6fca725 VG |
1051 | #endif |
1052 | #ifdef CONFIG_IA64 | |
88fc241f | 1053 | { |
88fc241f DC |
1054 | .procname = "unaligned-dump-stack", |
1055 | .data = &unaligned_dump_stack, | |
1056 | .maxlen = sizeof (int), | |
1057 | .mode = 0644, | |
6d456111 | 1058 | .proc_handler = proc_dointvec, |
88fc241f | 1059 | }, |
bebfa101 | 1060 | #endif |
e162b39a MSB |
1061 | #ifdef CONFIG_DETECT_HUNG_TASK |
1062 | { | |
e162b39a MSB |
1063 | .procname = "hung_task_panic", |
1064 | .data = &sysctl_hung_task_panic, | |
1065 | .maxlen = sizeof(int), | |
1066 | .mode = 0644, | |
6d456111 | 1067 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1068 | .extra1 = &zero, |
1069 | .extra2 = &one, | |
1070 | }, | |
82a1fcb9 | 1071 | { |
82a1fcb9 IM |
1072 | .procname = "hung_task_check_count", |
1073 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1074 | .maxlen = sizeof(int), |
82a1fcb9 | 1075 | .mode = 0644, |
cd64647f LZ |
1076 | .proc_handler = proc_dointvec_minmax, |
1077 | .extra1 = &zero, | |
82a1fcb9 IM |
1078 | }, |
1079 | { | |
82a1fcb9 IM |
1080 | .procname = "hung_task_timeout_secs", |
1081 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1082 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1083 | .mode = 0644, |
6d456111 | 1084 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1085 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1086 | }, |
1087 | { | |
82a1fcb9 IM |
1088 | .procname = "hung_task_warnings", |
1089 | .data = &sysctl_hung_task_warnings, | |
270750db | 1090 | .maxlen = sizeof(int), |
82a1fcb9 | 1091 | .mode = 0644, |
270750db AT |
1092 | .proc_handler = proc_dointvec_minmax, |
1093 | .extra1 = &neg_one, | |
82a1fcb9 | 1094 | }, |
c4f3b63f | 1095 | #endif |
23f78d4a IM |
1096 | #ifdef CONFIG_RT_MUTEXES |
1097 | { | |
23f78d4a IM |
1098 | .procname = "max_lock_depth", |
1099 | .data = &max_lock_depth, | |
1100 | .maxlen = sizeof(int), | |
1101 | .mode = 0644, | |
6d456111 | 1102 | .proc_handler = proc_dointvec, |
23f78d4a | 1103 | }, |
5096add8 | 1104 | #endif |
10a0a8d4 | 1105 | { |
10a0a8d4 JF |
1106 | .procname = "poweroff_cmd", |
1107 | .data = &poweroff_cmd, | |
1108 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1109 | .mode = 0644, | |
6d456111 | 1110 | .proc_handler = proc_dostring, |
10a0a8d4 | 1111 | }, |
0b77f5bf DH |
1112 | #ifdef CONFIG_KEYS |
1113 | { | |
0b77f5bf DH |
1114 | .procname = "keys", |
1115 | .mode = 0555, | |
1116 | .child = key_sysctls, | |
1117 | }, | |
1118 | #endif | |
cdd6c482 | 1119 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1120 | /* |
1121 | * User-space scripts rely on the existence of this file | |
1122 | * as a feature check for perf_events being enabled. | |
1123 | * | |
1124 | * So it's an ABI, do not remove! | |
1125 | */ | |
1ccd1549 | 1126 | { |
cdd6c482 IM |
1127 | .procname = "perf_event_paranoid", |
1128 | .data = &sysctl_perf_event_paranoid, | |
1129 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1130 | .mode = 0644, |
6d456111 | 1131 | .proc_handler = proc_dointvec, |
1ccd1549 | 1132 | }, |
c5078f78 | 1133 | { |
cdd6c482 IM |
1134 | .procname = "perf_event_mlock_kb", |
1135 | .data = &sysctl_perf_event_mlock, | |
1136 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1137 | .mode = 0644, |
6d456111 | 1138 | .proc_handler = proc_dointvec, |
c5078f78 | 1139 | }, |
a78ac325 | 1140 | { |
cdd6c482 IM |
1141 | .procname = "perf_event_max_sample_rate", |
1142 | .data = &sysctl_perf_event_sample_rate, | |
1143 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1144 | .mode = 0644, |
163ec435 | 1145 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1146 | .extra1 = &one, |
a78ac325 | 1147 | }, |
14c63f17 DH |
1148 | { |
1149 | .procname = "perf_cpu_time_max_percent", | |
1150 | .data = &sysctl_perf_cpu_time_max_percent, | |
1151 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1152 | .mode = 0644, | |
1153 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1154 | .extra1 = &zero, | |
1155 | .extra2 = &one_hundred, | |
1156 | }, | |
c5dfd78e ACM |
1157 | { |
1158 | .procname = "perf_event_max_stack", | |
a831100a | 1159 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1160 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1161 | .mode = 0644, | |
1162 | .proc_handler = perf_event_max_stack_handler, | |
1163 | .extra1 = &zero, | |
1164 | .extra2 = &six_hundred_forty_kb, | |
1165 | }, | |
c85b0334 ACM |
1166 | { |
1167 | .procname = "perf_event_max_contexts_per_stack", | |
1168 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1169 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1170 | .mode = 0644, | |
1171 | .proc_handler = perf_event_max_stack_handler, | |
1172 | .extra1 = &zero, | |
1173 | .extra2 = &one_thousand, | |
1174 | }, | |
cb684b5b | 1175 | #endif |
9e3961a0 PB |
1176 | { |
1177 | .procname = "panic_on_warn", | |
1178 | .data = &panic_on_warn, | |
1179 | .maxlen = sizeof(int), | |
1180 | .mode = 0644, | |
1181 | .proc_handler = proc_dointvec_minmax, | |
1182 | .extra1 = &zero, | |
1183 | .extra2 = &one, | |
1184 | }, | |
bc7a34b8 TG |
1185 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1186 | { | |
1187 | .procname = "timer_migration", | |
1188 | .data = &sysctl_timer_migration, | |
1189 | .maxlen = sizeof(unsigned int), | |
1190 | .mode = 0644, | |
1191 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1192 | .extra1 = &zero, |
1193 | .extra2 = &one, | |
bc7a34b8 | 1194 | }, |
1be7f75d AS |
1195 | #endif |
1196 | #ifdef CONFIG_BPF_SYSCALL | |
1197 | { | |
1198 | .procname = "unprivileged_bpf_disabled", | |
1199 | .data = &sysctl_unprivileged_bpf_disabled, | |
1200 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1201 | .mode = 0644, | |
1202 | /* only handle a transition from default "0" to "1" */ | |
1203 | .proc_handler = proc_dointvec_minmax, | |
1204 | .extra1 = &one, | |
1205 | .extra2 = &one, | |
1206 | }, | |
088e9d25 DBO |
1207 | #endif |
1208 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1209 | { | |
1210 | .procname = "panic_on_rcu_stall", | |
1211 | .data = &sysctl_panic_on_rcu_stall, | |
1212 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1213 | .mode = 0644, | |
1214 | .proc_handler = proc_dointvec_minmax, | |
1215 | .extra1 = &zero, | |
1216 | .extra2 = &one, | |
1217 | }, | |
bc7a34b8 | 1218 | #endif |
6fce56ec | 1219 | { } |
1da177e4 LT |
1220 | }; |
1221 | ||
d8217f07 | 1222 | static struct ctl_table vm_table[] = { |
1da177e4 | 1223 | { |
1da177e4 LT |
1224 | .procname = "overcommit_memory", |
1225 | .data = &sysctl_overcommit_memory, | |
1226 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1227 | .mode = 0644, | |
cb16e95f PH |
1228 | .proc_handler = proc_dointvec_minmax, |
1229 | .extra1 = &zero, | |
1230 | .extra2 = &two, | |
1da177e4 | 1231 | }, |
fadd8fbd | 1232 | { |
fadd8fbd KH |
1233 | .procname = "panic_on_oom", |
1234 | .data = &sysctl_panic_on_oom, | |
1235 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1236 | .mode = 0644, | |
cb16e95f PH |
1237 | .proc_handler = proc_dointvec_minmax, |
1238 | .extra1 = &zero, | |
1239 | .extra2 = &two, | |
fadd8fbd | 1240 | }, |
fe071d7e | 1241 | { |
fe071d7e DR |
1242 | .procname = "oom_kill_allocating_task", |
1243 | .data = &sysctl_oom_kill_allocating_task, | |
1244 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1245 | .mode = 0644, | |
6d456111 | 1246 | .proc_handler = proc_dointvec, |
fe071d7e | 1247 | }, |
fef1bdd6 | 1248 | { |
fef1bdd6 DR |
1249 | .procname = "oom_dump_tasks", |
1250 | .data = &sysctl_oom_dump_tasks, | |
1251 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1252 | .mode = 0644, | |
6d456111 | 1253 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1254 | }, |
1da177e4 | 1255 | { |
1da177e4 LT |
1256 | .procname = "overcommit_ratio", |
1257 | .data = &sysctl_overcommit_ratio, | |
1258 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1259 | .mode = 0644, | |
49f0ce5f JM |
1260 | .proc_handler = overcommit_ratio_handler, |
1261 | }, | |
1262 | { | |
1263 | .procname = "overcommit_kbytes", | |
1264 | .data = &sysctl_overcommit_kbytes, | |
1265 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1266 | .mode = 0644, | |
1267 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1268 | }, |
1269 | { | |
1da177e4 LT |
1270 | .procname = "page-cluster", |
1271 | .data = &page_cluster, | |
1272 | .maxlen = sizeof(int), | |
1273 | .mode = 0644, | |
cb16e95f PH |
1274 | .proc_handler = proc_dointvec_minmax, |
1275 | .extra1 = &zero, | |
1da177e4 LT |
1276 | }, |
1277 | { | |
1da177e4 LT |
1278 | .procname = "dirty_background_ratio", |
1279 | .data = &dirty_background_ratio, | |
1280 | .maxlen = sizeof(dirty_background_ratio), | |
1281 | .mode = 0644, | |
6d456111 | 1282 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1283 | .extra1 = &zero, |
1284 | .extra2 = &one_hundred, | |
1285 | }, | |
2da02997 | 1286 | { |
2da02997 DR |
1287 | .procname = "dirty_background_bytes", |
1288 | .data = &dirty_background_bytes, | |
1289 | .maxlen = sizeof(dirty_background_bytes), | |
1290 | .mode = 0644, | |
6d456111 | 1291 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1292 | .extra1 = &one_ul, |
2da02997 | 1293 | }, |
1da177e4 | 1294 | { |
1da177e4 LT |
1295 | .procname = "dirty_ratio", |
1296 | .data = &vm_dirty_ratio, | |
1297 | .maxlen = sizeof(vm_dirty_ratio), | |
1298 | .mode = 0644, | |
6d456111 | 1299 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1300 | .extra1 = &zero, |
1301 | .extra2 = &one_hundred, | |
1302 | }, | |
2da02997 | 1303 | { |
2da02997 DR |
1304 | .procname = "dirty_bytes", |
1305 | .data = &vm_dirty_bytes, | |
1306 | .maxlen = sizeof(vm_dirty_bytes), | |
1307 | .mode = 0644, | |
6d456111 | 1308 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1309 | .extra1 = &dirty_bytes_min, |
2da02997 | 1310 | }, |
1da177e4 | 1311 | { |
1da177e4 | 1312 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1313 | .data = &dirty_writeback_interval, |
1314 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1315 | .mode = 0644, |
6d456111 | 1316 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1317 | }, |
1318 | { | |
1da177e4 | 1319 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1320 | .data = &dirty_expire_interval, |
1321 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1322 | .mode = 0644, |
cb16e95f PH |
1323 | .proc_handler = proc_dointvec_minmax, |
1324 | .extra1 = &zero, | |
1da177e4 | 1325 | }, |
1efff914 TT |
1326 | { |
1327 | .procname = "dirtytime_expire_seconds", | |
1328 | .data = &dirtytime_expire_interval, | |
1329 | .maxlen = sizeof(dirty_expire_interval), | |
1330 | .mode = 0644, | |
1331 | .proc_handler = dirtytime_interval_handler, | |
1332 | .extra1 = &zero, | |
1333 | }, | |
1da177e4 | 1334 | { |
1da177e4 LT |
1335 | .procname = "swappiness", |
1336 | .data = &vm_swappiness, | |
1337 | .maxlen = sizeof(vm_swappiness), | |
1338 | .mode = 0644, | |
6d456111 | 1339 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1340 | .extra1 = &zero, |
1341 | .extra2 = &one_hundred, | |
1342 | }, | |
1343 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1344 | { |
1da177e4 | 1345 | .procname = "nr_hugepages", |
e5ff2159 | 1346 | .data = NULL, |
1da177e4 LT |
1347 | .maxlen = sizeof(unsigned long), |
1348 | .mode = 0644, | |
6d456111 | 1349 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1350 | }, |
1351 | #ifdef CONFIG_NUMA | |
1352 | { | |
1353 | .procname = "nr_hugepages_mempolicy", | |
1354 | .data = NULL, | |
1355 | .maxlen = sizeof(unsigned long), | |
1356 | .mode = 0644, | |
1357 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 | 1358 | }, |
4518085e KW |
1359 | { |
1360 | .procname = "numa_stat", | |
1361 | .data = &sysctl_vm_numa_stat, | |
1362 | .maxlen = sizeof(int), | |
1363 | .mode = 0644, | |
1364 | .proc_handler = sysctl_vm_numa_stat_handler, | |
1365 | .extra1 = &zero, | |
1366 | .extra2 = &one, | |
1367 | }, | |
06808b08 | 1368 | #endif |
1da177e4 | 1369 | { |
1da177e4 LT |
1370 | .procname = "hugetlb_shm_group", |
1371 | .data = &sysctl_hugetlb_shm_group, | |
1372 | .maxlen = sizeof(gid_t), | |
1373 | .mode = 0644, | |
6d456111 | 1374 | .proc_handler = proc_dointvec, |
1da177e4 | 1375 | }, |
396faf03 | 1376 | { |
396faf03 MG |
1377 | .procname = "hugepages_treat_as_movable", |
1378 | .data = &hugepages_treat_as_movable, | |
1379 | .maxlen = sizeof(int), | |
1380 | .mode = 0644, | |
86cdb465 | 1381 | .proc_handler = proc_dointvec, |
396faf03 | 1382 | }, |
d1c3fb1f | 1383 | { |
d1c3fb1f | 1384 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1385 | .data = NULL, |
1386 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1387 | .mode = 0644, |
6d456111 | 1388 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1389 | }, |
1da177e4 LT |
1390 | #endif |
1391 | { | |
1da177e4 LT |
1392 | .procname = "lowmem_reserve_ratio", |
1393 | .data = &sysctl_lowmem_reserve_ratio, | |
1394 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1395 | .mode = 0644, | |
6d456111 | 1396 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1397 | }, |
9d0243bc | 1398 | { |
9d0243bc AM |
1399 | .procname = "drop_caches", |
1400 | .data = &sysctl_drop_caches, | |
1401 | .maxlen = sizeof(int), | |
1402 | .mode = 0644, | |
1403 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1404 | .extra1 = &one, |
5509a5d2 | 1405 | .extra2 = &four, |
9d0243bc | 1406 | }, |
76ab0f53 MG |
1407 | #ifdef CONFIG_COMPACTION |
1408 | { | |
1409 | .procname = "compact_memory", | |
1410 | .data = &sysctl_compact_memory, | |
1411 | .maxlen = sizeof(int), | |
1412 | .mode = 0200, | |
1413 | .proc_handler = sysctl_compaction_handler, | |
1414 | }, | |
5e771905 MG |
1415 | { |
1416 | .procname = "extfrag_threshold", | |
1417 | .data = &sysctl_extfrag_threshold, | |
1418 | .maxlen = sizeof(int), | |
1419 | .mode = 0644, | |
1420 | .proc_handler = sysctl_extfrag_handler, | |
1421 | .extra1 = &min_extfrag_threshold, | |
1422 | .extra2 = &max_extfrag_threshold, | |
1423 | }, | |
5bbe3547 EM |
1424 | { |
1425 | .procname = "compact_unevictable_allowed", | |
1426 | .data = &sysctl_compact_unevictable_allowed, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
1429 | .proc_handler = proc_dointvec, | |
1430 | .extra1 = &zero, | |
1431 | .extra2 = &one, | |
1432 | }, | |
5e771905 | 1433 | |
76ab0f53 | 1434 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1435 | { |
1da177e4 LT |
1436 | .procname = "min_free_kbytes", |
1437 | .data = &min_free_kbytes, | |
1438 | .maxlen = sizeof(min_free_kbytes), | |
1439 | .mode = 0644, | |
6d456111 | 1440 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1441 | .extra1 = &zero, |
1442 | }, | |
795ae7a0 JW |
1443 | { |
1444 | .procname = "watermark_scale_factor", | |
1445 | .data = &watermark_scale_factor, | |
1446 | .maxlen = sizeof(watermark_scale_factor), | |
1447 | .mode = 0644, | |
1448 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1449 | .extra1 = &one, | |
1450 | .extra2 = &one_thousand, | |
1451 | }, | |
8ad4b1fb | 1452 | { |
8ad4b1fb RS |
1453 | .procname = "percpu_pagelist_fraction", |
1454 | .data = &percpu_pagelist_fraction, | |
1455 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1456 | .mode = 0644, | |
6d456111 | 1457 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1458 | .extra1 = &zero, |
8ad4b1fb | 1459 | }, |
1da177e4 LT |
1460 | #ifdef CONFIG_MMU |
1461 | { | |
1da177e4 LT |
1462 | .procname = "max_map_count", |
1463 | .data = &sysctl_max_map_count, | |
1464 | .maxlen = sizeof(sysctl_max_map_count), | |
1465 | .mode = 0644, | |
3e26120c | 1466 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1467 | .extra1 = &zero, |
1da177e4 | 1468 | }, |
dd8632a1 PM |
1469 | #else |
1470 | { | |
dd8632a1 PM |
1471 | .procname = "nr_trim_pages", |
1472 | .data = &sysctl_nr_trim_pages, | |
1473 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1474 | .mode = 0644, | |
6d456111 | 1475 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1476 | .extra1 = &zero, |
1477 | }, | |
1da177e4 LT |
1478 | #endif |
1479 | { | |
1da177e4 LT |
1480 | .procname = "laptop_mode", |
1481 | .data = &laptop_mode, | |
1482 | .maxlen = sizeof(laptop_mode), | |
1483 | .mode = 0644, | |
6d456111 | 1484 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1485 | }, |
1486 | { | |
1da177e4 LT |
1487 | .procname = "block_dump", |
1488 | .data = &block_dump, | |
1489 | .maxlen = sizeof(block_dump), | |
1490 | .mode = 0644, | |
6d456111 | 1491 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1492 | .extra1 = &zero, |
1493 | }, | |
1494 | { | |
1da177e4 LT |
1495 | .procname = "vfs_cache_pressure", |
1496 | .data = &sysctl_vfs_cache_pressure, | |
1497 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1498 | .mode = 0644, | |
6d456111 | 1499 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1500 | .extra1 = &zero, |
1501 | }, | |
1502 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1503 | { | |
1da177e4 LT |
1504 | .procname = "legacy_va_layout", |
1505 | .data = &sysctl_legacy_va_layout, | |
1506 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1507 | .mode = 0644, | |
6d456111 | 1508 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1509 | .extra1 = &zero, |
1510 | }, | |
1511 | #endif | |
1743660b CL |
1512 | #ifdef CONFIG_NUMA |
1513 | { | |
1743660b | 1514 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1515 | .data = &node_reclaim_mode, |
1516 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1517 | .mode = 0644, |
6d456111 | 1518 | .proc_handler = proc_dointvec, |
c84db23c | 1519 | .extra1 = &zero, |
1743660b | 1520 | }, |
9614634f | 1521 | { |
9614634f CL |
1522 | .procname = "min_unmapped_ratio", |
1523 | .data = &sysctl_min_unmapped_ratio, | |
1524 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1525 | .mode = 0644, | |
6d456111 | 1526 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1527 | .extra1 = &zero, |
1528 | .extra2 = &one_hundred, | |
1529 | }, | |
0ff38490 | 1530 | { |
0ff38490 CL |
1531 | .procname = "min_slab_ratio", |
1532 | .data = &sysctl_min_slab_ratio, | |
1533 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1534 | .mode = 0644, | |
6d456111 | 1535 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1536 | .extra1 = &zero, |
1537 | .extra2 = &one_hundred, | |
1538 | }, | |
e6e5494c | 1539 | #endif |
77461ab3 CL |
1540 | #ifdef CONFIG_SMP |
1541 | { | |
77461ab3 CL |
1542 | .procname = "stat_interval", |
1543 | .data = &sysctl_stat_interval, | |
1544 | .maxlen = sizeof(sysctl_stat_interval), | |
1545 | .mode = 0644, | |
6d456111 | 1546 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1547 | }, |
52b6f46b HD |
1548 | { |
1549 | .procname = "stat_refresh", | |
1550 | .data = NULL, | |
1551 | .maxlen = 0, | |
1552 | .mode = 0600, | |
1553 | .proc_handler = vmstat_refresh, | |
1554 | }, | |
77461ab3 | 1555 | #endif |
6e141546 | 1556 | #ifdef CONFIG_MMU |
ed032189 | 1557 | { |
ed032189 | 1558 | .procname = "mmap_min_addr", |
788084ab EP |
1559 | .data = &dac_mmap_min_addr, |
1560 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1561 | .mode = 0644, |
6d456111 | 1562 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1563 | }, |
6e141546 | 1564 | #endif |
f0c0b2b8 KH |
1565 | #ifdef CONFIG_NUMA |
1566 | { | |
f0c0b2b8 KH |
1567 | .procname = "numa_zonelist_order", |
1568 | .data = &numa_zonelist_order, | |
1569 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1570 | .mode = 0644, | |
6d456111 | 1571 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1572 | }, |
1573 | #endif | |
2b8232ce | 1574 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1575 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1576 | { |
e6e5494c | 1577 | .procname = "vdso_enabled", |
3d7ee969 AL |
1578 | #ifdef CONFIG_X86_32 |
1579 | .data = &vdso32_enabled, | |
1580 | .maxlen = sizeof(vdso32_enabled), | |
1581 | #else | |
e6e5494c IM |
1582 | .data = &vdso_enabled, |
1583 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1584 | #endif |
e6e5494c | 1585 | .mode = 0644, |
6d456111 | 1586 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1587 | .extra1 = &zero, |
1588 | }, | |
1da177e4 | 1589 | #endif |
195cf453 BG |
1590 | #ifdef CONFIG_HIGHMEM |
1591 | { | |
195cf453 BG |
1592 | .procname = "highmem_is_dirtyable", |
1593 | .data = &vm_highmem_is_dirtyable, | |
1594 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1595 | .mode = 0644, | |
6d456111 | 1596 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1597 | .extra1 = &zero, |
1598 | .extra2 = &one, | |
1599 | }, | |
1600 | #endif | |
6a46079c AK |
1601 | #ifdef CONFIG_MEMORY_FAILURE |
1602 | { | |
6a46079c AK |
1603 | .procname = "memory_failure_early_kill", |
1604 | .data = &sysctl_memory_failure_early_kill, | |
1605 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1606 | .mode = 0644, | |
6d456111 | 1607 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1608 | .extra1 = &zero, |
1609 | .extra2 = &one, | |
1610 | }, | |
1611 | { | |
6a46079c AK |
1612 | .procname = "memory_failure_recovery", |
1613 | .data = &sysctl_memory_failure_recovery, | |
1614 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1615 | .mode = 0644, | |
6d456111 | 1616 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1617 | .extra1 = &zero, |
1618 | .extra2 = &one, | |
1619 | }, | |
1620 | #endif | |
c9b1d098 AS |
1621 | { |
1622 | .procname = "user_reserve_kbytes", | |
1623 | .data = &sysctl_user_reserve_kbytes, | |
1624 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1625 | .mode = 0644, | |
1626 | .proc_handler = proc_doulongvec_minmax, | |
1627 | }, | |
4eeab4f5 AS |
1628 | { |
1629 | .procname = "admin_reserve_kbytes", | |
1630 | .data = &sysctl_admin_reserve_kbytes, | |
1631 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1632 | .mode = 0644, | |
1633 | .proc_handler = proc_doulongvec_minmax, | |
1634 | }, | |
d07e2259 DC |
1635 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1636 | { | |
1637 | .procname = "mmap_rnd_bits", | |
1638 | .data = &mmap_rnd_bits, | |
1639 | .maxlen = sizeof(mmap_rnd_bits), | |
1640 | .mode = 0600, | |
1641 | .proc_handler = proc_dointvec_minmax, | |
1642 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1643 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1644 | }, | |
1645 | #endif | |
1646 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1647 | { | |
1648 | .procname = "mmap_rnd_compat_bits", | |
1649 | .data = &mmap_rnd_compat_bits, | |
1650 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1651 | .mode = 0600, | |
1652 | .proc_handler = proc_dointvec_minmax, | |
1653 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1654 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1655 | }, | |
1656 | #endif | |
6fce56ec | 1657 | { } |
1da177e4 LT |
1658 | }; |
1659 | ||
d8217f07 | 1660 | static struct ctl_table fs_table[] = { |
1da177e4 | 1661 | { |
1da177e4 LT |
1662 | .procname = "inode-nr", |
1663 | .data = &inodes_stat, | |
3942c07c | 1664 | .maxlen = 2*sizeof(long), |
1da177e4 | 1665 | .mode = 0444, |
cffbc8aa | 1666 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1667 | }, |
1668 | { | |
1da177e4 LT |
1669 | .procname = "inode-state", |
1670 | .data = &inodes_stat, | |
3942c07c | 1671 | .maxlen = 7*sizeof(long), |
1da177e4 | 1672 | .mode = 0444, |
cffbc8aa | 1673 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1674 | }, |
1675 | { | |
1da177e4 LT |
1676 | .procname = "file-nr", |
1677 | .data = &files_stat, | |
518de9b3 | 1678 | .maxlen = sizeof(files_stat), |
1da177e4 | 1679 | .mode = 0444, |
6d456111 | 1680 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1681 | }, |
1682 | { | |
1da177e4 LT |
1683 | .procname = "file-max", |
1684 | .data = &files_stat.max_files, | |
518de9b3 | 1685 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1686 | .mode = 0644, |
518de9b3 | 1687 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1688 | }, |
9cfe015a | 1689 | { |
9cfe015a ED |
1690 | .procname = "nr_open", |
1691 | .data = &sysctl_nr_open, | |
9b80a184 | 1692 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1693 | .mode = 0644, |
6d456111 | 1694 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1695 | .extra1 = &sysctl_nr_open_min, |
1696 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1697 | }, |
1da177e4 | 1698 | { |
1da177e4 LT |
1699 | .procname = "dentry-state", |
1700 | .data = &dentry_stat, | |
3942c07c | 1701 | .maxlen = 6*sizeof(long), |
1da177e4 | 1702 | .mode = 0444, |
312d3ca8 | 1703 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1704 | }, |
1705 | { | |
1da177e4 LT |
1706 | .procname = "overflowuid", |
1707 | .data = &fs_overflowuid, | |
1708 | .maxlen = sizeof(int), | |
1709 | .mode = 0644, | |
6d456111 | 1710 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1711 | .extra1 = &minolduid, |
1712 | .extra2 = &maxolduid, | |
1713 | }, | |
1714 | { | |
1da177e4 LT |
1715 | .procname = "overflowgid", |
1716 | .data = &fs_overflowgid, | |
1717 | .maxlen = sizeof(int), | |
1718 | .mode = 0644, | |
6d456111 | 1719 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1720 | .extra1 = &minolduid, |
1721 | .extra2 = &maxolduid, | |
1722 | }, | |
bfcd17a6 | 1723 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1724 | { |
1da177e4 LT |
1725 | .procname = "leases-enable", |
1726 | .data = &leases_enable, | |
1727 | .maxlen = sizeof(int), | |
1728 | .mode = 0644, | |
6d456111 | 1729 | .proc_handler = proc_dointvec, |
1da177e4 | 1730 | }, |
bfcd17a6 | 1731 | #endif |
1da177e4 LT |
1732 | #ifdef CONFIG_DNOTIFY |
1733 | { | |
1da177e4 LT |
1734 | .procname = "dir-notify-enable", |
1735 | .data = &dir_notify_enable, | |
1736 | .maxlen = sizeof(int), | |
1737 | .mode = 0644, | |
6d456111 | 1738 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1739 | }, |
1740 | #endif | |
1741 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1742 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1743 | { |
1da177e4 LT |
1744 | .procname = "lease-break-time", |
1745 | .data = &lease_break_time, | |
1746 | .maxlen = sizeof(int), | |
1747 | .mode = 0644, | |
6d456111 | 1748 | .proc_handler = proc_dointvec, |
1da177e4 | 1749 | }, |
bfcd17a6 | 1750 | #endif |
ebf3f09c | 1751 | #ifdef CONFIG_AIO |
1da177e4 | 1752 | { |
1da177e4 LT |
1753 | .procname = "aio-nr", |
1754 | .data = &aio_nr, | |
1755 | .maxlen = sizeof(aio_nr), | |
1756 | .mode = 0444, | |
6d456111 | 1757 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1758 | }, |
1759 | { | |
1da177e4 LT |
1760 | .procname = "aio-max-nr", |
1761 | .data = &aio_max_nr, | |
1762 | .maxlen = sizeof(aio_max_nr), | |
1763 | .mode = 0644, | |
6d456111 | 1764 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1765 | }, |
ebf3f09c | 1766 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1767 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1768 | { |
0399cb08 RL |
1769 | .procname = "inotify", |
1770 | .mode = 0555, | |
1771 | .child = inotify_table, | |
1772 | }, | |
1773 | #endif | |
7ef9964e DL |
1774 | #ifdef CONFIG_EPOLL |
1775 | { | |
1776 | .procname = "epoll", | |
1777 | .mode = 0555, | |
1778 | .child = epoll_table, | |
1779 | }, | |
1780 | #endif | |
1da177e4 | 1781 | #endif |
800179c9 KC |
1782 | { |
1783 | .procname = "protected_symlinks", | |
1784 | .data = &sysctl_protected_symlinks, | |
1785 | .maxlen = sizeof(int), | |
1786 | .mode = 0600, | |
1787 | .proc_handler = proc_dointvec_minmax, | |
1788 | .extra1 = &zero, | |
1789 | .extra2 = &one, | |
1790 | }, | |
1791 | { | |
1792 | .procname = "protected_hardlinks", | |
1793 | .data = &sysctl_protected_hardlinks, | |
1794 | .maxlen = sizeof(int), | |
1795 | .mode = 0600, | |
1796 | .proc_handler = proc_dointvec_minmax, | |
1797 | .extra1 = &zero, | |
1798 | .extra2 = &one, | |
1799 | }, | |
d6e71144 | 1800 | { |
d6e71144 AC |
1801 | .procname = "suid_dumpable", |
1802 | .data = &suid_dumpable, | |
1803 | .maxlen = sizeof(int), | |
1804 | .mode = 0644, | |
54b50199 | 1805 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1806 | .extra1 = &zero, |
1807 | .extra2 = &two, | |
d6e71144 | 1808 | }, |
2abc26fc EB |
1809 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1810 | { | |
2abc26fc EB |
1811 | .procname = "binfmt_misc", |
1812 | .mode = 0555, | |
f9bd6733 | 1813 | .child = sysctl_mount_point, |
2abc26fc EB |
1814 | }, |
1815 | #endif | |
b492e95b | 1816 | { |
ff9da691 JA |
1817 | .procname = "pipe-max-size", |
1818 | .data = &pipe_max_size, | |
b492e95b JA |
1819 | .maxlen = sizeof(int), |
1820 | .mode = 0644, | |
ff9da691 JA |
1821 | .proc_handler = &pipe_proc_fn, |
1822 | .extra1 = &pipe_min_size, | |
b492e95b | 1823 | }, |
759c0114 WT |
1824 | { |
1825 | .procname = "pipe-user-pages-hard", | |
1826 | .data = &pipe_user_pages_hard, | |
1827 | .maxlen = sizeof(pipe_user_pages_hard), | |
1828 | .mode = 0644, | |
1829 | .proc_handler = proc_doulongvec_minmax, | |
1830 | }, | |
1831 | { | |
1832 | .procname = "pipe-user-pages-soft", | |
1833 | .data = &pipe_user_pages_soft, | |
1834 | .maxlen = sizeof(pipe_user_pages_soft), | |
1835 | .mode = 0644, | |
1836 | .proc_handler = proc_doulongvec_minmax, | |
1837 | }, | |
d2921684 EB |
1838 | { |
1839 | .procname = "mount-max", | |
1840 | .data = &sysctl_mount_max, | |
1841 | .maxlen = sizeof(unsigned int), | |
1842 | .mode = 0644, | |
1843 | .proc_handler = proc_dointvec_minmax, | |
1844 | .extra1 = &one, | |
1845 | }, | |
6fce56ec | 1846 | { } |
1da177e4 LT |
1847 | }; |
1848 | ||
d8217f07 | 1849 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1850 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1851 | { |
abd4f750 MAS |
1852 | .procname = "exception-trace", |
1853 | .data = &show_unhandled_signals, | |
1854 | .maxlen = sizeof(int), | |
1855 | .mode = 0644, | |
1856 | .proc_handler = proc_dointvec | |
1857 | }, | |
b2be84df MH |
1858 | #endif |
1859 | #if defined(CONFIG_OPTPROBES) | |
1860 | { | |
1861 | .procname = "kprobes-optimization", | |
1862 | .data = &sysctl_kprobes_optimization, | |
1863 | .maxlen = sizeof(int), | |
1864 | .mode = 0644, | |
1865 | .proc_handler = proc_kprobes_optimization_handler, | |
1866 | .extra1 = &zero, | |
1867 | .extra2 = &one, | |
1868 | }, | |
abd4f750 | 1869 | #endif |
6fce56ec | 1870 | { } |
1da177e4 LT |
1871 | }; |
1872 | ||
d8217f07 | 1873 | static struct ctl_table dev_table[] = { |
6fce56ec | 1874 | { } |
0eeca283 | 1875 | }; |
1da177e4 | 1876 | |
de4e83bd | 1877 | int __init sysctl_init(void) |
d912b0cc | 1878 | { |
fd4b616b SR |
1879 | struct ctl_table_header *hdr; |
1880 | ||
1881 | hdr = register_sysctl_table(sysctl_base_table); | |
1882 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1883 | return 0; |
1884 | } | |
1885 | ||
b89a8171 EB |
1886 | #endif /* CONFIG_SYSCTL */ |
1887 | ||
1da177e4 LT |
1888 | /* |
1889 | * /proc/sys support | |
1890 | */ | |
1891 | ||
b89a8171 | 1892 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1893 | |
f8808300 KC |
1894 | static int _proc_do_string(char *data, int maxlen, int write, |
1895 | char __user *buffer, | |
b1ba4ddd | 1896 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1897 | { |
1898 | size_t len; | |
1899 | char __user *p; | |
1900 | char c; | |
8d060877 ON |
1901 | |
1902 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1903 | *lenp = 0; |
1904 | return 0; | |
1905 | } | |
8d060877 | 1906 | |
1da177e4 | 1907 | if (write) { |
f4aacea2 KC |
1908 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1909 | /* Only continue writes not past the end of buffer. */ | |
1910 | len = strlen(data); | |
1911 | if (len > maxlen - 1) | |
1912 | len = maxlen - 1; | |
1913 | ||
1914 | if (*ppos > len) | |
1915 | return 0; | |
1916 | len = *ppos; | |
1917 | } else { | |
1918 | /* Start writing from beginning of buffer. */ | |
1919 | len = 0; | |
1920 | } | |
1921 | ||
2ca9bb45 | 1922 | *ppos += *lenp; |
1da177e4 | 1923 | p = buffer; |
2ca9bb45 | 1924 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1925 | if (get_user(c, p++)) |
1926 | return -EFAULT; | |
1927 | if (c == 0 || c == '\n') | |
1928 | break; | |
2ca9bb45 | 1929 | data[len++] = c; |
1da177e4 | 1930 | } |
f8808300 | 1931 | data[len] = 0; |
1da177e4 | 1932 | } else { |
f5dd3d6f SV |
1933 | len = strlen(data); |
1934 | if (len > maxlen) | |
1935 | len = maxlen; | |
8d060877 ON |
1936 | |
1937 | if (*ppos > len) { | |
1938 | *lenp = 0; | |
1939 | return 0; | |
1940 | } | |
1941 | ||
1942 | data += *ppos; | |
1943 | len -= *ppos; | |
1944 | ||
1da177e4 LT |
1945 | if (len > *lenp) |
1946 | len = *lenp; | |
1947 | if (len) | |
f8808300 | 1948 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1949 | return -EFAULT; |
1950 | if (len < *lenp) { | |
f8808300 | 1951 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1952 | return -EFAULT; |
1953 | len++; | |
1954 | } | |
1955 | *lenp = len; | |
1956 | *ppos += len; | |
1957 | } | |
1958 | return 0; | |
1959 | } | |
1960 | ||
f4aacea2 KC |
1961 | static void warn_sysctl_write(struct ctl_table *table) |
1962 | { | |
1963 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1964 | "This will not be supported in the future. To silence this\n" | |
1965 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1966 | current->comm, table->procname); | |
1967 | } | |
1968 | ||
d383d484 LR |
1969 | /** |
1970 | * proc_first_pos_non_zero_ignore - check if firs position is allowed | |
1971 | * @ppos: file position | |
1972 | * @table: the sysctl table | |
1973 | * | |
1974 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
1975 | * mode indicates this is not allowed for numeric input types. String proc | |
1976 | * hadlers can ignore the return value. | |
1977 | */ | |
1978 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
1979 | struct ctl_table *table) | |
1980 | { | |
1981 | if (!*ppos) | |
1982 | return false; | |
1983 | ||
1984 | switch (sysctl_writes_strict) { | |
1985 | case SYSCTL_WRITES_STRICT: | |
1986 | return true; | |
1987 | case SYSCTL_WRITES_WARN: | |
1988 | warn_sysctl_write(table); | |
1989 | return false; | |
1990 | default: | |
1991 | return false; | |
1992 | } | |
1993 | } | |
1994 | ||
f5dd3d6f SV |
1995 | /** |
1996 | * proc_dostring - read a string sysctl | |
1997 | * @table: the sysctl table | |
1998 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1999 | * @buffer: the user buffer |
2000 | * @lenp: the size of the user buffer | |
2001 | * @ppos: file position | |
2002 | * | |
2003 | * Reads/writes a string from/to the user buffer. If the kernel | |
2004 | * buffer provided is not large enough to hold the string, the | |
2005 | * string is truncated. The copied string is %NULL-terminated. | |
2006 | * If the string is being read by the user process, it is copied | |
2007 | * and a newline '\n' is added. It is truncated if the buffer is | |
2008 | * not large enough. | |
2009 | * | |
2010 | * Returns 0 on success. | |
2011 | */ | |
8d65af78 | 2012 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2013 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2014 | { | |
d383d484 LR |
2015 | if (write) |
2016 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2017 | |
f8808300 KC |
2018 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2019 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2020 | } |
2021 | ||
00b7c339 AW |
2022 | static size_t proc_skip_spaces(char **buf) |
2023 | { | |
2024 | size_t ret; | |
2025 | char *tmp = skip_spaces(*buf); | |
2026 | ret = tmp - *buf; | |
2027 | *buf = tmp; | |
2028 | return ret; | |
2029 | } | |
2030 | ||
9f977fb7 OP |
2031 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2032 | { | |
2033 | while (*size) { | |
2034 | if (**buf != v) | |
2035 | break; | |
2036 | (*size)--; | |
2037 | (*buf)++; | |
2038 | } | |
2039 | } | |
2040 | ||
00b7c339 AW |
2041 | #define TMPBUFLEN 22 |
2042 | /** | |
0fc377bd | 2043 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2044 | * |
0fc377bd RD |
2045 | * @buf: a kernel buffer |
2046 | * @size: size of the kernel buffer | |
2047 | * @val: this is where the number will be stored | |
2048 | * @neg: set to %TRUE if number is negative | |
2049 | * @perm_tr: a vector which contains the allowed trailers | |
2050 | * @perm_tr_len: size of the perm_tr vector | |
2051 | * @tr: pointer to store the trailer character | |
00b7c339 | 2052 | * |
0fc377bd RD |
2053 | * In case of success %0 is returned and @buf and @size are updated with |
2054 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2055 | * character exists (size is non-zero after returning from this | |
2056 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2057 | */ |
2058 | static int proc_get_long(char **buf, size_t *size, | |
2059 | unsigned long *val, bool *neg, | |
2060 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2061 | { | |
2062 | int len; | |
2063 | char *p, tmp[TMPBUFLEN]; | |
2064 | ||
2065 | if (!*size) | |
2066 | return -EINVAL; | |
2067 | ||
2068 | len = *size; | |
2069 | if (len > TMPBUFLEN - 1) | |
2070 | len = TMPBUFLEN - 1; | |
2071 | ||
2072 | memcpy(tmp, *buf, len); | |
2073 | ||
2074 | tmp[len] = 0; | |
2075 | p = tmp; | |
2076 | if (*p == '-' && *size > 1) { | |
2077 | *neg = true; | |
2078 | p++; | |
2079 | } else | |
2080 | *neg = false; | |
2081 | if (!isdigit(*p)) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | *val = simple_strtoul(p, &p, 0); | |
2085 | ||
2086 | len = p - tmp; | |
2087 | ||
2088 | /* We don't know if the next char is whitespace thus we may accept | |
2089 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2090 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2091 | if (len == TMPBUFLEN - 1) | |
2092 | return -EINVAL; | |
2093 | ||
2094 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2095 | return -EINVAL; | |
1da177e4 | 2096 | |
00b7c339 AW |
2097 | if (tr && (len < *size)) |
2098 | *tr = *p; | |
2099 | ||
2100 | *buf += len; | |
2101 | *size -= len; | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | /** | |
0fc377bd | 2107 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2108 | * |
0fc377bd RD |
2109 | * @buf: the user buffer |
2110 | * @size: the size of the user buffer | |
2111 | * @val: the integer to be converted | |
2112 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2113 | * |
0fc377bd RD |
2114 | * In case of success %0 is returned and @buf and @size are updated with |
2115 | * the amount of bytes written. | |
00b7c339 AW |
2116 | */ |
2117 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2118 | bool neg) | |
2119 | { | |
2120 | int len; | |
2121 | char tmp[TMPBUFLEN], *p = tmp; | |
2122 | ||
2123 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2124 | len = strlen(tmp); | |
2125 | if (len > *size) | |
2126 | len = *size; | |
2127 | if (copy_to_user(*buf, tmp, len)) | |
2128 | return -EFAULT; | |
2129 | *size -= len; | |
2130 | *buf += len; | |
2131 | return 0; | |
2132 | } | |
2133 | #undef TMPBUFLEN | |
2134 | ||
2135 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2136 | { | |
2137 | if (*size) { | |
2138 | char __user **buffer = (char __user **)buf; | |
2139 | if (put_user(c, *buffer)) | |
2140 | return -EFAULT; | |
2141 | (*size)--, (*buffer)++; | |
2142 | *buf = *buffer; | |
2143 | } | |
2144 | return 0; | |
2145 | } | |
1da177e4 | 2146 | |
00b7c339 | 2147 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2148 | int *valp, |
2149 | int write, void *data) | |
2150 | { | |
2151 | if (write) { | |
230633d1 HS |
2152 | if (*negp) { |
2153 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2154 | return -EINVAL; | |
2155 | *valp = -*lvalp; | |
2156 | } else { | |
2157 | if (*lvalp > (unsigned long) INT_MAX) | |
2158 | return -EINVAL; | |
2159 | *valp = *lvalp; | |
2160 | } | |
1da177e4 LT |
2161 | } else { |
2162 | int val = *valp; | |
2163 | if (val < 0) { | |
00b7c339 | 2164 | *negp = true; |
9a5bc726 | 2165 | *lvalp = -(unsigned long)val; |
1da177e4 | 2166 | } else { |
00b7c339 | 2167 | *negp = false; |
1da177e4 LT |
2168 | *lvalp = (unsigned long)val; |
2169 | } | |
2170 | } | |
2171 | return 0; | |
2172 | } | |
2173 | ||
4f2fec00 LR |
2174 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2175 | unsigned int *valp, | |
2176 | int write, void *data) | |
e7d316a0 SAK |
2177 | { |
2178 | if (write) { | |
425fffd8 LZ |
2179 | if (*lvalp > UINT_MAX) |
2180 | return -EINVAL; | |
e7d316a0 SAK |
2181 | *valp = *lvalp; |
2182 | } else { | |
2183 | unsigned int val = *valp; | |
2184 | *lvalp = (unsigned long)val; | |
2185 | } | |
2186 | return 0; | |
2187 | } | |
2188 | ||
00b7c339 AW |
2189 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2190 | ||
d8217f07 | 2191 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2192 | int write, void __user *buffer, |
fcfbd547 | 2193 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2194 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2195 | int write, void *data), |
2196 | void *data) | |
2197 | { | |
00b7c339 | 2198 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2199 | size_t left; |
70f6cbb6 | 2200 | char *kbuf = NULL, *p; |
1da177e4 | 2201 | |
00b7c339 | 2202 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2203 | *lenp = 0; |
2204 | return 0; | |
2205 | } | |
2206 | ||
fcfbd547 | 2207 | i = (int *) tbl_data; |
1da177e4 LT |
2208 | vleft = table->maxlen / sizeof(*i); |
2209 | left = *lenp; | |
2210 | ||
2211 | if (!conv) | |
2212 | conv = do_proc_dointvec_conv; | |
2213 | ||
00b7c339 | 2214 | if (write) { |
d383d484 LR |
2215 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2216 | goto out; | |
f4aacea2 | 2217 | |
00b7c339 AW |
2218 | if (left > PAGE_SIZE - 1) |
2219 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2220 | p = kbuf = memdup_user_nul(buffer, left); |
2221 | if (IS_ERR(kbuf)) | |
2222 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2223 | } |
2224 | ||
1da177e4 | 2225 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2226 | unsigned long lval; |
2227 | bool neg; | |
1da177e4 | 2228 | |
00b7c339 | 2229 | if (write) { |
70f6cbb6 | 2230 | left -= proc_skip_spaces(&p); |
1da177e4 | 2231 | |
563b0467 O |
2232 | if (!left) |
2233 | break; | |
70f6cbb6 | 2234 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2235 | proc_wspace_sep, |
2236 | sizeof(proc_wspace_sep), NULL); | |
2237 | if (err) | |
1da177e4 | 2238 | break; |
00b7c339 AW |
2239 | if (conv(&neg, &lval, i, 1, data)) { |
2240 | err = -EINVAL; | |
1da177e4 | 2241 | break; |
00b7c339 | 2242 | } |
1da177e4 | 2243 | } else { |
00b7c339 AW |
2244 | if (conv(&neg, &lval, i, 0, data)) { |
2245 | err = -EINVAL; | |
2246 | break; | |
2247 | } | |
1da177e4 | 2248 | if (!first) |
00b7c339 AW |
2249 | err = proc_put_char(&buffer, &left, '\t'); |
2250 | if (err) | |
2251 | break; | |
2252 | err = proc_put_long(&buffer, &left, lval, neg); | |
2253 | if (err) | |
1da177e4 | 2254 | break; |
1da177e4 LT |
2255 | } |
2256 | } | |
2257 | ||
00b7c339 AW |
2258 | if (!write && !first && left && !err) |
2259 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2260 | if (write && !err && left) |
70f6cbb6 | 2261 | left -= proc_skip_spaces(&p); |
1da177e4 | 2262 | if (write) { |
70f6cbb6 | 2263 | kfree(kbuf); |
00b7c339 AW |
2264 | if (first) |
2265 | return err ? : -EINVAL; | |
1da177e4 | 2266 | } |
1da177e4 | 2267 | *lenp -= left; |
f4aacea2 | 2268 | out: |
1da177e4 | 2269 | *ppos += *lenp; |
00b7c339 | 2270 | return err; |
1da177e4 LT |
2271 | } |
2272 | ||
8d65af78 | 2273 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2274 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2275 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2276 | int write, void *data), |
2277 | void *data) | |
2278 | { | |
8d65af78 | 2279 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2280 | buffer, lenp, ppos, conv, data); |
2281 | } | |
2282 | ||
4f2fec00 LR |
2283 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2284 | struct ctl_table *table, | |
2285 | void __user *buffer, | |
2286 | size_t *lenp, loff_t *ppos, | |
2287 | int (*conv)(unsigned long *lvalp, | |
2288 | unsigned int *valp, | |
2289 | int write, void *data), | |
2290 | void *data) | |
2291 | { | |
2292 | unsigned long lval; | |
2293 | int err = 0; | |
2294 | size_t left; | |
2295 | bool neg; | |
2296 | char *kbuf = NULL, *p; | |
2297 | ||
2298 | left = *lenp; | |
2299 | ||
2300 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2301 | goto bail_early; | |
2302 | ||
2303 | if (left > PAGE_SIZE - 1) | |
2304 | left = PAGE_SIZE - 1; | |
2305 | ||
2306 | p = kbuf = memdup_user_nul(buffer, left); | |
2307 | if (IS_ERR(kbuf)) | |
2308 | return -EINVAL; | |
2309 | ||
2310 | left -= proc_skip_spaces(&p); | |
2311 | if (!left) { | |
2312 | err = -EINVAL; | |
2313 | goto out_free; | |
2314 | } | |
2315 | ||
2316 | err = proc_get_long(&p, &left, &lval, &neg, | |
2317 | proc_wspace_sep, | |
2318 | sizeof(proc_wspace_sep), NULL); | |
2319 | if (err || neg) { | |
2320 | err = -EINVAL; | |
2321 | goto out_free; | |
2322 | } | |
2323 | ||
2324 | if (conv(&lval, tbl_data, 1, data)) { | |
2325 | err = -EINVAL; | |
2326 | goto out_free; | |
2327 | } | |
2328 | ||
2329 | if (!err && left) | |
2330 | left -= proc_skip_spaces(&p); | |
2331 | ||
2332 | out_free: | |
2333 | kfree(kbuf); | |
2334 | if (err) | |
2335 | return -EINVAL; | |
2336 | ||
2337 | return 0; | |
2338 | ||
2339 | /* This is in keeping with old __do_proc_dointvec() */ | |
2340 | bail_early: | |
2341 | *ppos += *lenp; | |
2342 | return err; | |
2343 | } | |
2344 | ||
2345 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2346 | size_t *lenp, loff_t *ppos, | |
2347 | int (*conv)(unsigned long *lvalp, | |
2348 | unsigned int *valp, | |
2349 | int write, void *data), | |
2350 | void *data) | |
2351 | { | |
2352 | unsigned long lval; | |
2353 | int err = 0; | |
2354 | size_t left; | |
2355 | ||
2356 | left = *lenp; | |
2357 | ||
2358 | if (conv(&lval, tbl_data, 0, data)) { | |
2359 | err = -EINVAL; | |
2360 | goto out; | |
2361 | } | |
2362 | ||
2363 | err = proc_put_long(&buffer, &left, lval, false); | |
2364 | if (err || !left) | |
2365 | goto out; | |
2366 | ||
2367 | err = proc_put_char(&buffer, &left, '\n'); | |
2368 | ||
2369 | out: | |
2370 | *lenp -= left; | |
2371 | *ppos += *lenp; | |
2372 | ||
2373 | return err; | |
2374 | } | |
2375 | ||
2376 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2377 | int write, void __user *buffer, | |
2378 | size_t *lenp, loff_t *ppos, | |
2379 | int (*conv)(unsigned long *lvalp, | |
2380 | unsigned int *valp, | |
2381 | int write, void *data), | |
2382 | void *data) | |
2383 | { | |
2384 | unsigned int *i, vleft; | |
2385 | ||
2386 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2387 | *lenp = 0; | |
2388 | return 0; | |
2389 | } | |
2390 | ||
2391 | i = (unsigned int *) tbl_data; | |
2392 | vleft = table->maxlen / sizeof(*i); | |
2393 | ||
2394 | /* | |
2395 | * Arrays are not supported, keep this simple. *Do not* add | |
2396 | * support for them. | |
2397 | */ | |
2398 | if (vleft != 1) { | |
2399 | *lenp = 0; | |
2400 | return -EINVAL; | |
2401 | } | |
2402 | ||
2403 | if (!conv) | |
2404 | conv = do_proc_douintvec_conv; | |
2405 | ||
2406 | if (write) | |
2407 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2408 | conv, data); | |
2409 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2410 | } | |
2411 | ||
2412 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2413 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2414 | int (*conv)(unsigned long *lvalp, | |
2415 | unsigned int *valp, | |
2416 | int write, void *data), | |
2417 | void *data) | |
2418 | { | |
2419 | return __do_proc_douintvec(table->data, table, write, | |
2420 | buffer, lenp, ppos, conv, data); | |
2421 | } | |
2422 | ||
1da177e4 LT |
2423 | /** |
2424 | * proc_dointvec - read a vector of integers | |
2425 | * @table: the sysctl table | |
2426 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2427 | * @buffer: the user buffer |
2428 | * @lenp: the size of the user buffer | |
2429 | * @ppos: file position | |
2430 | * | |
2431 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2432 | * values from/to the user buffer, treated as an ASCII string. | |
2433 | * | |
2434 | * Returns 0 on success. | |
2435 | */ | |
8d65af78 | 2436 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2437 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2438 | { | |
e7d316a0 SAK |
2439 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2440 | } | |
2441 | ||
2442 | /** | |
2443 | * proc_douintvec - read a vector of unsigned integers | |
2444 | * @table: the sysctl table | |
2445 | * @write: %TRUE if this is a write to the sysctl file | |
2446 | * @buffer: the user buffer | |
2447 | * @lenp: the size of the user buffer | |
2448 | * @ppos: file position | |
2449 | * | |
2450 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2451 | * values from/to the user buffer, treated as an ASCII string. | |
2452 | * | |
2453 | * Returns 0 on success. | |
2454 | */ | |
2455 | int proc_douintvec(struct ctl_table *table, int write, | |
2456 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2457 | { | |
4f2fec00 LR |
2458 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2459 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2460 | } |
2461 | ||
34f5a398 | 2462 | /* |
25ddbb18 AK |
2463 | * Taint values can only be increased |
2464 | * This means we can safely use a temporary. | |
34f5a398 | 2465 | */ |
8d65af78 | 2466 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2467 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2468 | { | |
25ddbb18 AK |
2469 | struct ctl_table t; |
2470 | unsigned long tmptaint = get_taint(); | |
2471 | int err; | |
34f5a398 | 2472 | |
91fcd412 | 2473 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2474 | return -EPERM; |
2475 | ||
25ddbb18 AK |
2476 | t = *table; |
2477 | t.data = &tmptaint; | |
8d65af78 | 2478 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2479 | if (err < 0) |
2480 | return err; | |
2481 | ||
2482 | if (write) { | |
2483 | /* | |
2484 | * Poor man's atomic or. Not worth adding a primitive | |
2485 | * to everyone's atomic.h for this | |
2486 | */ | |
2487 | int i; | |
2488 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2489 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2490 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2491 | } |
2492 | } | |
2493 | ||
2494 | return err; | |
34f5a398 TT |
2495 | } |
2496 | ||
bfdc0b49 | 2497 | #ifdef CONFIG_PRINTK |
620f6e8e | 2498 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2499 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2500 | { | |
2501 | if (write && !capable(CAP_SYS_ADMIN)) | |
2502 | return -EPERM; | |
2503 | ||
2504 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2505 | } | |
2506 | #endif | |
2507 | ||
1da177e4 LT |
2508 | struct do_proc_dointvec_minmax_conv_param { |
2509 | int *min; | |
2510 | int *max; | |
2511 | }; | |
2512 | ||
00b7c339 AW |
2513 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2514 | int *valp, | |
1da177e4 LT |
2515 | int write, void *data) |
2516 | { | |
2517 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2518 | if (write) { | |
2519 | int val = *negp ? -*lvalp : *lvalp; | |
2520 | if ((param->min && *param->min > val) || | |
2521 | (param->max && *param->max < val)) | |
2522 | return -EINVAL; | |
2523 | *valp = val; | |
2524 | } else { | |
2525 | int val = *valp; | |
2526 | if (val < 0) { | |
00b7c339 | 2527 | *negp = true; |
9a5bc726 | 2528 | *lvalp = -(unsigned long)val; |
1da177e4 | 2529 | } else { |
00b7c339 | 2530 | *negp = false; |
1da177e4 LT |
2531 | *lvalp = (unsigned long)val; |
2532 | } | |
2533 | } | |
2534 | return 0; | |
2535 | } | |
2536 | ||
2537 | /** | |
2538 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2539 | * @table: the sysctl table | |
2540 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2541 | * @buffer: the user buffer |
2542 | * @lenp: the size of the user buffer | |
2543 | * @ppos: file position | |
2544 | * | |
2545 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2546 | * values from/to the user buffer, treated as an ASCII string. | |
2547 | * | |
2548 | * This routine will ensure the values are within the range specified by | |
2549 | * table->extra1 (min) and table->extra2 (max). | |
2550 | * | |
2551 | * Returns 0 on success. | |
2552 | */ | |
8d65af78 | 2553 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2554 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2555 | { | |
2556 | struct do_proc_dointvec_minmax_conv_param param = { | |
2557 | .min = (int *) table->extra1, | |
2558 | .max = (int *) table->extra2, | |
2559 | }; | |
8d65af78 | 2560 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2561 | do_proc_dointvec_minmax_conv, ¶m); |
2562 | } | |
2563 | ||
61d9b56a LR |
2564 | struct do_proc_douintvec_minmax_conv_param { |
2565 | unsigned int *min; | |
2566 | unsigned int *max; | |
2567 | }; | |
2568 | ||
2569 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2570 | unsigned int *valp, | |
2571 | int write, void *data) | |
2572 | { | |
2573 | struct do_proc_douintvec_minmax_conv_param *param = data; | |
2574 | ||
2575 | if (write) { | |
2576 | unsigned int val = *lvalp; | |
2577 | ||
2578 | if ((param->min && *param->min > val) || | |
2579 | (param->max && *param->max < val)) | |
2580 | return -ERANGE; | |
2581 | ||
2582 | if (*lvalp > UINT_MAX) | |
2583 | return -EINVAL; | |
2584 | *valp = val; | |
2585 | } else { | |
2586 | unsigned int val = *valp; | |
2587 | *lvalp = (unsigned long) val; | |
2588 | } | |
2589 | ||
2590 | return 0; | |
2591 | } | |
2592 | ||
2593 | /** | |
2594 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2595 | * @table: the sysctl table | |
2596 | * @write: %TRUE if this is a write to the sysctl file | |
2597 | * @buffer: the user buffer | |
2598 | * @lenp: the size of the user buffer | |
2599 | * @ppos: file position | |
2600 | * | |
2601 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2602 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2603 | * strings are not allowed. | |
2604 | * | |
2605 | * This routine will ensure the values are within the range specified by | |
2606 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2607 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2608 | * userspace. | |
2609 | * | |
2610 | * Returns 0 on success. | |
2611 | */ | |
2612 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2613 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2614 | { | |
2615 | struct do_proc_douintvec_minmax_conv_param param = { | |
2616 | .min = (unsigned int *) table->extra1, | |
2617 | .max = (unsigned int *) table->extra2, | |
2618 | }; | |
2619 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2620 | do_proc_douintvec_minmax_conv, ¶m); | |
2621 | } | |
2622 | ||
54b50199 KC |
2623 | static void validate_coredump_safety(void) |
2624 | { | |
046d662f | 2625 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2626 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2627 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2628 | printk(KERN_WARNING |
2629 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2630 | "Pipe handler or fully qualified core dump path required.\n" | |
2631 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2632 | ); | |
54b50199 | 2633 | } |
046d662f | 2634 | #endif |
54b50199 KC |
2635 | } |
2636 | ||
2637 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2638 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2639 | { | |
2640 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2641 | if (!error) | |
2642 | validate_coredump_safety(); | |
2643 | return error; | |
2644 | } | |
2645 | ||
046d662f | 2646 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2647 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2648 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2649 | { | |
2650 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2651 | if (!error) | |
2652 | validate_coredump_safety(); | |
2653 | return error; | |
2654 | } | |
046d662f | 2655 | #endif |
54b50199 | 2656 | |
d8217f07 | 2657 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2658 | void __user *buffer, |
2659 | size_t *lenp, loff_t *ppos, | |
2660 | unsigned long convmul, | |
2661 | unsigned long convdiv) | |
2662 | { | |
00b7c339 AW |
2663 | unsigned long *i, *min, *max; |
2664 | int vleft, first = 1, err = 0; | |
00b7c339 | 2665 | size_t left; |
70f6cbb6 | 2666 | char *kbuf = NULL, *p; |
00b7c339 AW |
2667 | |
2668 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2669 | *lenp = 0; |
2670 | return 0; | |
2671 | } | |
00b7c339 | 2672 | |
fcfbd547 | 2673 | i = (unsigned long *) data; |
1da177e4 LT |
2674 | min = (unsigned long *) table->extra1; |
2675 | max = (unsigned long *) table->extra2; | |
2676 | vleft = table->maxlen / sizeof(unsigned long); | |
2677 | left = *lenp; | |
00b7c339 AW |
2678 | |
2679 | if (write) { | |
d383d484 LR |
2680 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2681 | goto out; | |
f4aacea2 | 2682 | |
00b7c339 AW |
2683 | if (left > PAGE_SIZE - 1) |
2684 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2685 | p = kbuf = memdup_user_nul(buffer, left); |
2686 | if (IS_ERR(kbuf)) | |
2687 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2688 | } |
2689 | ||
27b3d80a | 2690 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2691 | unsigned long val; |
2692 | ||
1da177e4 | 2693 | if (write) { |
00b7c339 AW |
2694 | bool neg; |
2695 | ||
70f6cbb6 | 2696 | left -= proc_skip_spaces(&p); |
00b7c339 | 2697 | |
70f6cbb6 | 2698 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2699 | proc_wspace_sep, |
2700 | sizeof(proc_wspace_sep), NULL); | |
2701 | if (err) | |
1da177e4 LT |
2702 | break; |
2703 | if (neg) | |
1da177e4 | 2704 | continue; |
ff9f8a7c | 2705 | val = convmul * val / convdiv; |
1da177e4 LT |
2706 | if ((min && val < *min) || (max && val > *max)) |
2707 | continue; | |
2708 | *i = val; | |
2709 | } else { | |
00b7c339 | 2710 | val = convdiv * (*i) / convmul; |
7833819d | 2711 | if (!first) { |
00b7c339 | 2712 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2713 | if (err) |
2714 | break; | |
2715 | } | |
00b7c339 AW |
2716 | err = proc_put_long(&buffer, &left, val, false); |
2717 | if (err) | |
2718 | break; | |
1da177e4 LT |
2719 | } |
2720 | } | |
2721 | ||
00b7c339 AW |
2722 | if (!write && !first && left && !err) |
2723 | err = proc_put_char(&buffer, &left, '\n'); | |
2724 | if (write && !err) | |
70f6cbb6 | 2725 | left -= proc_skip_spaces(&p); |
1da177e4 | 2726 | if (write) { |
70f6cbb6 | 2727 | kfree(kbuf); |
00b7c339 AW |
2728 | if (first) |
2729 | return err ? : -EINVAL; | |
1da177e4 | 2730 | } |
1da177e4 | 2731 | *lenp -= left; |
f4aacea2 | 2732 | out: |
1da177e4 | 2733 | *ppos += *lenp; |
00b7c339 | 2734 | return err; |
1da177e4 LT |
2735 | } |
2736 | ||
d8217f07 | 2737 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2738 | void __user *buffer, |
2739 | size_t *lenp, loff_t *ppos, | |
2740 | unsigned long convmul, | |
2741 | unsigned long convdiv) | |
2742 | { | |
2743 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2744 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2745 | } |
2746 | ||
1da177e4 LT |
2747 | /** |
2748 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2749 | * @table: the sysctl table | |
2750 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2751 | * @buffer: the user buffer |
2752 | * @lenp: the size of the user buffer | |
2753 | * @ppos: file position | |
2754 | * | |
2755 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2756 | * values from/to the user buffer, treated as an ASCII string. | |
2757 | * | |
2758 | * This routine will ensure the values are within the range specified by | |
2759 | * table->extra1 (min) and table->extra2 (max). | |
2760 | * | |
2761 | * Returns 0 on success. | |
2762 | */ | |
8d65af78 | 2763 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2764 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2765 | { | |
8d65af78 | 2766 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2767 | } |
2768 | ||
2769 | /** | |
2770 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2771 | * @table: the sysctl table | |
2772 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2773 | * @buffer: the user buffer |
2774 | * @lenp: the size of the user buffer | |
2775 | * @ppos: file position | |
2776 | * | |
2777 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2778 | * values from/to the user buffer, treated as an ASCII string. The values | |
2779 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2780 | * | |
2781 | * This routine will ensure the values are within the range specified by | |
2782 | * table->extra1 (min) and table->extra2 (max). | |
2783 | * | |
2784 | * Returns 0 on success. | |
2785 | */ | |
d8217f07 | 2786 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2787 | void __user *buffer, |
2788 | size_t *lenp, loff_t *ppos) | |
2789 | { | |
8d65af78 | 2790 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2791 | lenp, ppos, HZ, 1000l); |
2792 | } | |
2793 | ||
2794 | ||
00b7c339 | 2795 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2796 | int *valp, |
2797 | int write, void *data) | |
2798 | { | |
2799 | if (write) { | |
63259457 | 2800 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2801 | return 1; |
1da177e4 LT |
2802 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2803 | } else { | |
2804 | int val = *valp; | |
2805 | unsigned long lval; | |
2806 | if (val < 0) { | |
00b7c339 | 2807 | *negp = true; |
9a5bc726 | 2808 | lval = -(unsigned long)val; |
1da177e4 | 2809 | } else { |
00b7c339 | 2810 | *negp = false; |
1da177e4 LT |
2811 | lval = (unsigned long)val; |
2812 | } | |
2813 | *lvalp = lval / HZ; | |
2814 | } | |
2815 | return 0; | |
2816 | } | |
2817 | ||
00b7c339 | 2818 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2819 | int *valp, |
2820 | int write, void *data) | |
2821 | { | |
2822 | if (write) { | |
cba9f33d BS |
2823 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2824 | return 1; | |
1da177e4 LT |
2825 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2826 | } else { | |
2827 | int val = *valp; | |
2828 | unsigned long lval; | |
2829 | if (val < 0) { | |
00b7c339 | 2830 | *negp = true; |
9a5bc726 | 2831 | lval = -(unsigned long)val; |
1da177e4 | 2832 | } else { |
00b7c339 | 2833 | *negp = false; |
1da177e4 LT |
2834 | lval = (unsigned long)val; |
2835 | } | |
2836 | *lvalp = jiffies_to_clock_t(lval); | |
2837 | } | |
2838 | return 0; | |
2839 | } | |
2840 | ||
00b7c339 | 2841 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2842 | int *valp, |
2843 | int write, void *data) | |
2844 | { | |
2845 | if (write) { | |
d738ce8f FF |
2846 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2847 | ||
2848 | if (jif > INT_MAX) | |
2849 | return 1; | |
2850 | *valp = (int)jif; | |
1da177e4 LT |
2851 | } else { |
2852 | int val = *valp; | |
2853 | unsigned long lval; | |
2854 | if (val < 0) { | |
00b7c339 | 2855 | *negp = true; |
9a5bc726 | 2856 | lval = -(unsigned long)val; |
1da177e4 | 2857 | } else { |
00b7c339 | 2858 | *negp = false; |
1da177e4 LT |
2859 | lval = (unsigned long)val; |
2860 | } | |
2861 | *lvalp = jiffies_to_msecs(lval); | |
2862 | } | |
2863 | return 0; | |
2864 | } | |
2865 | ||
2866 | /** | |
2867 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2868 | * @table: the sysctl table | |
2869 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2870 | * @buffer: the user buffer |
2871 | * @lenp: the size of the user buffer | |
2872 | * @ppos: file position | |
2873 | * | |
2874 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2875 | * values from/to the user buffer, treated as an ASCII string. | |
2876 | * The values read are assumed to be in seconds, and are converted into | |
2877 | * jiffies. | |
2878 | * | |
2879 | * Returns 0 on success. | |
2880 | */ | |
8d65af78 | 2881 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2882 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2883 | { | |
8d65af78 | 2884 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2885 | do_proc_dointvec_jiffies_conv,NULL); |
2886 | } | |
2887 | ||
2888 | /** | |
2889 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2890 | * @table: the sysctl table | |
2891 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2892 | * @buffer: the user buffer |
2893 | * @lenp: the size of the user buffer | |
1e5d5331 | 2894 | * @ppos: pointer to the file position |
1da177e4 LT |
2895 | * |
2896 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2897 | * values from/to the user buffer, treated as an ASCII string. | |
2898 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2899 | * are converted into jiffies. | |
2900 | * | |
2901 | * Returns 0 on success. | |
2902 | */ | |
8d65af78 | 2903 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2904 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2905 | { | |
8d65af78 | 2906 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2907 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2908 | } | |
2909 | ||
2910 | /** | |
2911 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2912 | * @table: the sysctl table | |
2913 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2914 | * @buffer: the user buffer |
2915 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2916 | * @ppos: file position |
2917 | * @ppos: the current position in the file | |
1da177e4 LT |
2918 | * |
2919 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2920 | * values from/to the user buffer, treated as an ASCII string. | |
2921 | * The values read are assumed to be in 1/1000 seconds, and | |
2922 | * are converted into jiffies. | |
2923 | * | |
2924 | * Returns 0 on success. | |
2925 | */ | |
8d65af78 | 2926 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2927 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2928 | { | |
8d65af78 | 2929 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2930 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2931 | } | |
2932 | ||
8d65af78 | 2933 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2934 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2935 | { | |
2936 | struct pid *new_pid; | |
2937 | pid_t tmp; | |
2938 | int r; | |
2939 | ||
6c5f3e7b | 2940 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2941 | |
8d65af78 | 2942 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2943 | lenp, ppos, NULL, NULL); |
2944 | if (r || !write) | |
2945 | return r; | |
2946 | ||
2947 | new_pid = find_get_pid(tmp); | |
2948 | if (!new_pid) | |
2949 | return -ESRCH; | |
2950 | ||
2951 | put_pid(xchg(&cad_pid, new_pid)); | |
2952 | return 0; | |
2953 | } | |
2954 | ||
9f977fb7 OP |
2955 | /** |
2956 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2957 | * @table: the sysctl table | |
2958 | * @write: %TRUE if this is a write to the sysctl file | |
2959 | * @buffer: the user buffer | |
2960 | * @lenp: the size of the user buffer | |
2961 | * @ppos: file position | |
2962 | * | |
2963 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2964 | * in table->maxlen. | |
2965 | * | |
2966 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2967 | * large bitmaps may be represented in a compact manner. Writing into | |
2968 | * the file will clear the bitmap then update it with the given input. | |
2969 | * | |
2970 | * Returns 0 on success. | |
2971 | */ | |
2972 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2973 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2974 | { | |
2975 | int err = 0; | |
2976 | bool first = 1; | |
2977 | size_t left = *lenp; | |
2978 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2979 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2980 | unsigned long *tmp_bitmap = NULL; |
2981 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2982 | ||
122ff243 | 2983 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2984 | *lenp = 0; |
2985 | return 0; | |
2986 | } | |
2987 | ||
2988 | if (write) { | |
70f6cbb6 | 2989 | char *kbuf, *p; |
9f977fb7 OP |
2990 | |
2991 | if (left > PAGE_SIZE - 1) | |
2992 | left = PAGE_SIZE - 1; | |
2993 | ||
70f6cbb6 AV |
2994 | p = kbuf = memdup_user_nul(buffer, left); |
2995 | if (IS_ERR(kbuf)) | |
2996 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
2997 | |
2998 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2999 | GFP_KERNEL); | |
3000 | if (!tmp_bitmap) { | |
70f6cbb6 | 3001 | kfree(kbuf); |
9f977fb7 OP |
3002 | return -ENOMEM; |
3003 | } | |
70f6cbb6 | 3004 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3005 | while (!err && left) { |
3006 | unsigned long val_a, val_b; | |
3007 | bool neg; | |
3008 | ||
70f6cbb6 | 3009 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3010 | sizeof(tr_a), &c); |
3011 | if (err) | |
3012 | break; | |
3013 | if (val_a >= bitmap_len || neg) { | |
3014 | err = -EINVAL; | |
3015 | break; | |
3016 | } | |
3017 | ||
3018 | val_b = val_a; | |
3019 | if (left) { | |
70f6cbb6 | 3020 | p++; |
9f977fb7 OP |
3021 | left--; |
3022 | } | |
3023 | ||
3024 | if (c == '-') { | |
70f6cbb6 | 3025 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3026 | &neg, tr_b, sizeof(tr_b), |
3027 | &c); | |
3028 | if (err) | |
3029 | break; | |
3030 | if (val_b >= bitmap_len || neg || | |
3031 | val_a > val_b) { | |
3032 | err = -EINVAL; | |
3033 | break; | |
3034 | } | |
3035 | if (left) { | |
70f6cbb6 | 3036 | p++; |
9f977fb7 OP |
3037 | left--; |
3038 | } | |
3039 | } | |
3040 | ||
5a04cca6 | 3041 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3042 | first = 0; |
70f6cbb6 | 3043 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3044 | } |
70f6cbb6 | 3045 | kfree(kbuf); |
9f977fb7 OP |
3046 | } else { |
3047 | unsigned long bit_a, bit_b = 0; | |
3048 | ||
3049 | while (left) { | |
3050 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3051 | if (bit_a >= bitmap_len) | |
3052 | break; | |
3053 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3054 | bit_a + 1) - 1; | |
3055 | ||
3056 | if (!first) { | |
3057 | err = proc_put_char(&buffer, &left, ','); | |
3058 | if (err) | |
3059 | break; | |
3060 | } | |
3061 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3062 | if (err) | |
3063 | break; | |
3064 | if (bit_a != bit_b) { | |
3065 | err = proc_put_char(&buffer, &left, '-'); | |
3066 | if (err) | |
3067 | break; | |
3068 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3069 | if (err) | |
3070 | break; | |
3071 | } | |
3072 | ||
3073 | first = 0; bit_b++; | |
3074 | } | |
3075 | if (!err) | |
3076 | err = proc_put_char(&buffer, &left, '\n'); | |
3077 | } | |
3078 | ||
3079 | if (!err) { | |
3080 | if (write) { | |
3081 | if (*ppos) | |
3082 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3083 | else | |
5a04cca6 | 3084 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
3085 | } |
3086 | kfree(tmp_bitmap); | |
3087 | *lenp -= left; | |
3088 | *ppos += *lenp; | |
3089 | return 0; | |
3090 | } else { | |
3091 | kfree(tmp_bitmap); | |
3092 | return err; | |
3093 | } | |
3094 | } | |
3095 | ||
55610500 | 3096 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3097 | |
8d65af78 | 3098 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3099 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3100 | { | |
3101 | return -ENOSYS; | |
3102 | } | |
3103 | ||
8d65af78 | 3104 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3105 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3106 | { |
3107 | return -ENOSYS; | |
3108 | } | |
3109 | ||
e7d316a0 SAK |
3110 | int proc_douintvec(struct ctl_table *table, int write, |
3111 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3112 | { | |
3113 | return -ENOSYS; | |
3114 | } | |
3115 | ||
8d65af78 | 3116 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3117 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3118 | { | |
3119 | return -ENOSYS; | |
3120 | } | |
3121 | ||
61d9b56a LR |
3122 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3123 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3124 | { | |
3125 | return -ENOSYS; | |
3126 | } | |
3127 | ||
8d65af78 | 3128 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3129 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3130 | { | |
3131 | return -ENOSYS; | |
3132 | } | |
3133 | ||
8d65af78 | 3134 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3135 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3136 | { | |
3137 | return -ENOSYS; | |
3138 | } | |
3139 | ||
8d65af78 | 3140 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3141 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3142 | { | |
3143 | return -ENOSYS; | |
3144 | } | |
3145 | ||
8d65af78 | 3146 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3147 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3148 | { | |
3149 | return -ENOSYS; | |
3150 | } | |
3151 | ||
d8217f07 | 3152 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3153 | void __user *buffer, |
3154 | size_t *lenp, loff_t *ppos) | |
3155 | { | |
3156 | return -ENOSYS; | |
3157 | } | |
3158 | ||
3159 | ||
55610500 | 3160 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3161 | |
1da177e4 LT |
3162 | /* |
3163 | * No sense putting this after each symbol definition, twice, | |
3164 | * exception granted :-) | |
3165 | */ | |
3166 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3167 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3168 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3169 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3170 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3171 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3172 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3173 | EXPORT_SYMBOL(proc_dostring); | |
3174 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3175 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |