Commit | Line | Data |
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35728b82 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (C) 1991, 1992 Linus Torvalds |
4 | * | |
58c5fc2b TG |
5 | * This file contains the interface functions for the various time related |
6 | * system calls: time, stime, gettimeofday, settimeofday, adjtime | |
7 | * | |
8 | * Modification history: | |
6fa6c3b1 | 9 | * |
1da177e4 | 10 | * 1993-09-02 Philip Gladstone |
0a0fca9d | 11 | * Created file with time related functions from sched/core.c and adjtimex() |
1da177e4 LT |
12 | * 1993-10-08 Torsten Duwe |
13 | * adjtime interface update and CMOS clock write code | |
14 | * 1995-08-13 Torsten Duwe | |
15 | * kernel PLL updated to 1994-12-13 specs (rfc-1589) | |
16 | * 1999-01-16 Ulrich Windl | |
17 | * Introduced error checking for many cases in adjtimex(). | |
18 | * Updated NTP code according to technical memorandum Jan '96 | |
19 | * "A Kernel Model for Precision Timekeeping" by Dave Mills | |
20 | * Allow time_constant larger than MAXTC(6) for NTP v4 (MAXTC == 10) | |
21 | * (Even though the technical memorandum forbids it) | |
22 | * 2004-07-14 Christoph Lameter | |
23 | * Added getnstimeofday to allow the posix timer functions to return | |
24 | * with nanosecond accuracy | |
25 | */ | |
26 | ||
9984de1a | 27 | #include <linux/export.h> |
abcbcb80 | 28 | #include <linux/kernel.h> |
1da177e4 | 29 | #include <linux/timex.h> |
c59ede7b | 30 | #include <linux/capability.h> |
189374ae | 31 | #include <linux/timekeeper_internal.h> |
1da177e4 | 32 | #include <linux/errno.h> |
1da177e4 LT |
33 | #include <linux/syscalls.h> |
34 | #include <linux/security.h> | |
35 | #include <linux/fs.h> | |
71abb3af | 36 | #include <linux/math64.h> |
e3d5a27d | 37 | #include <linux/ptrace.h> |
1da177e4 | 38 | |
7c0f6ba6 | 39 | #include <linux/uaccess.h> |
3a4d44b6 | 40 | #include <linux/compat.h> |
1da177e4 LT |
41 | #include <asm/unistd.h> |
42 | ||
0a227985 | 43 | #include <generated/timeconst.h> |
8b094cd0 | 44 | #include "timekeeping.h" |
bdc80787 | 45 | |
6fa6c3b1 | 46 | /* |
1da177e4 LT |
47 | * The timezone where the local system is located. Used as a default by some |
48 | * programs who obtain this value by using gettimeofday. | |
49 | */ | |
50 | struct timezone sys_tz; | |
51 | ||
52 | EXPORT_SYMBOL(sys_tz); | |
53 | ||
54 | #ifdef __ARCH_WANT_SYS_TIME | |
55 | ||
56 | /* | |
57 | * sys_time() can be implemented in user-level using | |
58 | * sys_gettimeofday(). Is this for backwards compatibility? If so, | |
59 | * why not move it into the appropriate arch directory (for those | |
60 | * architectures that need it). | |
61 | */ | |
58fd3aa2 | 62 | SYSCALL_DEFINE1(time, time_t __user *, tloc) |
1da177e4 | 63 | { |
f5a89295 | 64 | time_t i = (time_t)ktime_get_real_seconds(); |
1da177e4 LT |
65 | |
66 | if (tloc) { | |
20082208 | 67 | if (put_user(i,tloc)) |
e3d5a27d | 68 | return -EFAULT; |
1da177e4 | 69 | } |
e3d5a27d | 70 | force_successful_syscall_return(); |
1da177e4 LT |
71 | return i; |
72 | } | |
73 | ||
74 | /* | |
75 | * sys_stime() can be implemented in user-level using | |
76 | * sys_settimeofday(). Is this for backwards compatibility? If so, | |
77 | * why not move it into the appropriate arch directory (for those | |
78 | * architectures that need it). | |
79 | */ | |
6fa6c3b1 | 80 | |
58fd3aa2 | 81 | SYSCALL_DEFINE1(stime, time_t __user *, tptr) |
1da177e4 | 82 | { |
4eb1bca1 | 83 | struct timespec64 tv; |
1da177e4 LT |
84 | int err; |
85 | ||
86 | if (get_user(tv.tv_sec, tptr)) | |
87 | return -EFAULT; | |
88 | ||
89 | tv.tv_nsec = 0; | |
90 | ||
4eb1bca1 | 91 | err = security_settime64(&tv, NULL); |
1da177e4 LT |
92 | if (err) |
93 | return err; | |
94 | ||
4eb1bca1 | 95 | do_settimeofday64(&tv); |
1da177e4 LT |
96 | return 0; |
97 | } | |
98 | ||
99 | #endif /* __ARCH_WANT_SYS_TIME */ | |
100 | ||
8dabe724 | 101 | #ifdef CONFIG_COMPAT_32BIT_TIME |
d33c577c | 102 | #ifdef __ARCH_WANT_SYS_TIME32 |
b180db2c | 103 | |
9afc5eee | 104 | /* old_time32_t is a 32 bit "long" and needs to get converted. */ |
8dabe724 | 105 | SYSCALL_DEFINE1(time32, old_time32_t __user *, tloc) |
b180db2c | 106 | { |
9afc5eee | 107 | old_time32_t i; |
b180db2c | 108 | |
9afc5eee | 109 | i = (old_time32_t)ktime_get_real_seconds(); |
b180db2c AV |
110 | |
111 | if (tloc) { | |
112 | if (put_user(i,tloc)) | |
113 | return -EFAULT; | |
114 | } | |
115 | force_successful_syscall_return(); | |
116 | return i; | |
117 | } | |
118 | ||
8dabe724 | 119 | SYSCALL_DEFINE1(stime32, old_time32_t __user *, tptr) |
b180db2c | 120 | { |
4eb1bca1 | 121 | struct timespec64 tv; |
b180db2c AV |
122 | int err; |
123 | ||
124 | if (get_user(tv.tv_sec, tptr)) | |
125 | return -EFAULT; | |
126 | ||
127 | tv.tv_nsec = 0; | |
128 | ||
4eb1bca1 | 129 | err = security_settime64(&tv, NULL); |
b180db2c AV |
130 | if (err) |
131 | return err; | |
132 | ||
4eb1bca1 | 133 | do_settimeofday64(&tv); |
b180db2c AV |
134 | return 0; |
135 | } | |
136 | ||
d33c577c | 137 | #endif /* __ARCH_WANT_SYS_TIME32 */ |
b180db2c AV |
138 | #endif |
139 | ||
58fd3aa2 HC |
140 | SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv, |
141 | struct timezone __user *, tz) | |
1da177e4 LT |
142 | { |
143 | if (likely(tv != NULL)) { | |
33e26418 AB |
144 | struct timespec64 ts; |
145 | ||
146 | ktime_get_real_ts64(&ts); | |
147 | if (put_user(ts.tv_sec, &tv->tv_sec) || | |
148 | put_user(ts.tv_nsec / 1000, &tv->tv_usec)) | |
1da177e4 LT |
149 | return -EFAULT; |
150 | } | |
151 | if (unlikely(tz != NULL)) { | |
152 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
153 | return -EFAULT; | |
154 | } | |
155 | return 0; | |
156 | } | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * In case for some reason the CMOS clock has not already been running | |
160 | * in UTC, but in some local time: The first time we set the timezone, | |
161 | * we will warp the clock so that it is ticking UTC time instead of | |
162 | * local time. Presumably, if someone is setting the timezone then we | |
163 | * are running in an environment where the programs understand about | |
164 | * timezones. This should be done at boot time in the /etc/rc script, | |
165 | * as soon as possible, so that the clock can be set right. Otherwise, | |
166 | * various programs will get confused when the clock gets warped. | |
167 | */ | |
168 | ||
86d34732 | 169 | int do_sys_settimeofday64(const struct timespec64 *tv, const struct timezone *tz) |
1da177e4 LT |
170 | { |
171 | static int firsttime = 1; | |
172 | int error = 0; | |
173 | ||
7a8e61f8 | 174 | if (tv && !timespec64_valid_settod(tv)) |
718bcceb TG |
175 | return -EINVAL; |
176 | ||
86d34732 | 177 | error = security_settime64(tv, tz); |
1da177e4 LT |
178 | if (error) |
179 | return error; | |
180 | ||
181 | if (tz) { | |
6f7d7984 SL |
182 | /* Verify we're witin the +-15 hrs range */ |
183 | if (tz->tz_minuteswest > 15*60 || tz->tz_minuteswest < -15*60) | |
184 | return -EINVAL; | |
185 | ||
1da177e4 | 186 | sys_tz = *tz; |
2c622148 | 187 | update_vsyscall_tz(); |
1da177e4 LT |
188 | if (firsttime) { |
189 | firsttime = 0; | |
190 | if (!tv) | |
e0956dcc | 191 | timekeeping_warp_clock(); |
1da177e4 LT |
192 | } |
193 | } | |
194 | if (tv) | |
86d34732 | 195 | return do_settimeofday64(tv); |
1da177e4 LT |
196 | return 0; |
197 | } | |
198 | ||
58fd3aa2 HC |
199 | SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, |
200 | struct timezone __user *, tz) | |
1da177e4 | 201 | { |
2ac00f17 | 202 | struct timespec64 new_ts; |
1da177e4 | 203 | struct timeval user_tv; |
1da177e4 LT |
204 | struct timezone new_tz; |
205 | ||
206 | if (tv) { | |
207 | if (copy_from_user(&user_tv, tv, sizeof(*tv))) | |
208 | return -EFAULT; | |
6ada1fc0 SL |
209 | |
210 | if (!timeval_valid(&user_tv)) | |
211 | return -EINVAL; | |
212 | ||
1da177e4 LT |
213 | new_ts.tv_sec = user_tv.tv_sec; |
214 | new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; | |
215 | } | |
216 | if (tz) { | |
217 | if (copy_from_user(&new_tz, tz, sizeof(*tz))) | |
218 | return -EFAULT; | |
219 | } | |
220 | ||
2ac00f17 | 221 | return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL); |
1da177e4 LT |
222 | } |
223 | ||
2b2d0285 | 224 | #ifdef CONFIG_COMPAT |
9afc5eee | 225 | COMPAT_SYSCALL_DEFINE2(gettimeofday, struct old_timeval32 __user *, tv, |
2b2d0285 AV |
226 | struct timezone __user *, tz) |
227 | { | |
228 | if (tv) { | |
33e26418 | 229 | struct timespec64 ts; |
2b2d0285 | 230 | |
33e26418 AB |
231 | ktime_get_real_ts64(&ts); |
232 | if (put_user(ts.tv_sec, &tv->tv_sec) || | |
233 | put_user(ts.tv_nsec / 1000, &tv->tv_usec)) | |
2b2d0285 AV |
234 | return -EFAULT; |
235 | } | |
236 | if (tz) { | |
237 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
238 | return -EFAULT; | |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
9afc5eee | 244 | COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv, |
2b2d0285 AV |
245 | struct timezone __user *, tz) |
246 | { | |
247 | struct timespec64 new_ts; | |
248 | struct timeval user_tv; | |
249 | struct timezone new_tz; | |
250 | ||
251 | if (tv) { | |
252 | if (compat_get_timeval(&user_tv, tv)) | |
253 | return -EFAULT; | |
9176ab1b | 254 | |
255 | if (!timeval_valid(&user_tv)) | |
256 | return -EINVAL; | |
257 | ||
2b2d0285 AV |
258 | new_ts.tv_sec = user_tv.tv_sec; |
259 | new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; | |
260 | } | |
261 | if (tz) { | |
262 | if (copy_from_user(&new_tz, tz, sizeof(*tz))) | |
263 | return -EFAULT; | |
264 | } | |
265 | ||
266 | return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL); | |
267 | } | |
268 | #endif | |
269 | ||
3876ced4 DD |
270 | #if !defined(CONFIG_64BIT_TIME) || defined(CONFIG_64BIT) |
271 | SYSCALL_DEFINE1(adjtimex, struct __kernel_timex __user *, txc_p) | |
1da177e4 | 272 | { |
ead25417 | 273 | struct __kernel_timex txc; /* Local copy of parameter */ |
1da177e4 LT |
274 | int ret; |
275 | ||
276 | /* Copy the user data space into the kernel copy | |
277 | * structure. But bear in mind that the structures | |
278 | * may change | |
279 | */ | |
ead25417 | 280 | if (copy_from_user(&txc, txc_p, sizeof(struct __kernel_timex))) |
1da177e4 LT |
281 | return -EFAULT; |
282 | ret = do_adjtimex(&txc); | |
ead25417 | 283 | return copy_to_user(txc_p, &txc, sizeof(struct __kernel_timex)) ? -EFAULT : ret; |
1da177e4 | 284 | } |
3876ced4 | 285 | #endif |
1da177e4 | 286 | |
4d5f007e | 287 | #ifdef CONFIG_COMPAT_32BIT_TIME |
ead25417 | 288 | int get_old_timex32(struct __kernel_timex *txc, const struct old_timex32 __user *utp) |
4d5f007e AB |
289 | { |
290 | struct old_timex32 tx32; | |
291 | ||
ead25417 | 292 | memset(txc, 0, sizeof(struct __kernel_timex)); |
4d5f007e AB |
293 | if (copy_from_user(&tx32, utp, sizeof(struct old_timex32))) |
294 | return -EFAULT; | |
295 | ||
296 | txc->modes = tx32.modes; | |
297 | txc->offset = tx32.offset; | |
298 | txc->freq = tx32.freq; | |
299 | txc->maxerror = tx32.maxerror; | |
300 | txc->esterror = tx32.esterror; | |
301 | txc->status = tx32.status; | |
302 | txc->constant = tx32.constant; | |
303 | txc->precision = tx32.precision; | |
304 | txc->tolerance = tx32.tolerance; | |
305 | txc->time.tv_sec = tx32.time.tv_sec; | |
306 | txc->time.tv_usec = tx32.time.tv_usec; | |
307 | txc->tick = tx32.tick; | |
308 | txc->ppsfreq = tx32.ppsfreq; | |
309 | txc->jitter = tx32.jitter; | |
310 | txc->shift = tx32.shift; | |
311 | txc->stabil = tx32.stabil; | |
312 | txc->jitcnt = tx32.jitcnt; | |
313 | txc->calcnt = tx32.calcnt; | |
314 | txc->errcnt = tx32.errcnt; | |
315 | txc->stbcnt = tx32.stbcnt; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
ead25417 | 320 | int put_old_timex32(struct old_timex32 __user *utp, const struct __kernel_timex *txc) |
4d5f007e AB |
321 | { |
322 | struct old_timex32 tx32; | |
323 | ||
324 | memset(&tx32, 0, sizeof(struct old_timex32)); | |
325 | tx32.modes = txc->modes; | |
326 | tx32.offset = txc->offset; | |
327 | tx32.freq = txc->freq; | |
328 | tx32.maxerror = txc->maxerror; | |
329 | tx32.esterror = txc->esterror; | |
330 | tx32.status = txc->status; | |
331 | tx32.constant = txc->constant; | |
332 | tx32.precision = txc->precision; | |
333 | tx32.tolerance = txc->tolerance; | |
334 | tx32.time.tv_sec = txc->time.tv_sec; | |
335 | tx32.time.tv_usec = txc->time.tv_usec; | |
336 | tx32.tick = txc->tick; | |
337 | tx32.ppsfreq = txc->ppsfreq; | |
338 | tx32.jitter = txc->jitter; | |
339 | tx32.shift = txc->shift; | |
340 | tx32.stabil = txc->stabil; | |
341 | tx32.jitcnt = txc->jitcnt; | |
342 | tx32.calcnt = txc->calcnt; | |
343 | tx32.errcnt = txc->errcnt; | |
344 | tx32.stbcnt = txc->stbcnt; | |
345 | tx32.tai = txc->tai; | |
346 | if (copy_to_user(utp, &tx32, sizeof(struct old_timex32))) | |
347 | return -EFAULT; | |
348 | return 0; | |
349 | } | |
3a4d44b6 | 350 | |
8dabe724 | 351 | SYSCALL_DEFINE1(adjtimex_time32, struct old_timex32 __user *, utp) |
3a4d44b6 | 352 | { |
ead25417 | 353 | struct __kernel_timex txc; |
3a4d44b6 AV |
354 | int err, ret; |
355 | ||
4d5f007e | 356 | err = get_old_timex32(&txc, utp); |
3a4d44b6 AV |
357 | if (err) |
358 | return err; | |
359 | ||
360 | ret = do_adjtimex(&txc); | |
361 | ||
4d5f007e | 362 | err = put_old_timex32(utp, &txc); |
3a4d44b6 AV |
363 | if (err) |
364 | return err; | |
365 | ||
366 | return ret; | |
367 | } | |
368 | #endif | |
369 | ||
753e9c5c ED |
370 | /* |
371 | * Convert jiffies to milliseconds and back. | |
372 | * | |
373 | * Avoid unnecessary multiplications/divisions in the | |
374 | * two most common HZ cases: | |
375 | */ | |
af3b5628 | 376 | unsigned int jiffies_to_msecs(const unsigned long j) |
753e9c5c ED |
377 | { |
378 | #if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ) | |
379 | return (MSEC_PER_SEC / HZ) * j; | |
380 | #elif HZ > MSEC_PER_SEC && !(HZ % MSEC_PER_SEC) | |
381 | return (j + (HZ / MSEC_PER_SEC) - 1)/(HZ / MSEC_PER_SEC); | |
382 | #else | |
bdc80787 | 383 | # if BITS_PER_LONG == 32 |
abcbcb80 GU |
384 | return (HZ_TO_MSEC_MUL32 * j + (1ULL << HZ_TO_MSEC_SHR32) - 1) >> |
385 | HZ_TO_MSEC_SHR32; | |
bdc80787 | 386 | # else |
abcbcb80 | 387 | return DIV_ROUND_UP(j * HZ_TO_MSEC_NUM, HZ_TO_MSEC_DEN); |
bdc80787 | 388 | # endif |
753e9c5c ED |
389 | #endif |
390 | } | |
391 | EXPORT_SYMBOL(jiffies_to_msecs); | |
392 | ||
af3b5628 | 393 | unsigned int jiffies_to_usecs(const unsigned long j) |
753e9c5c | 394 | { |
e0758676 FW |
395 | /* |
396 | * Hz usually doesn't go much further MSEC_PER_SEC. | |
397 | * jiffies_to_usecs() and usecs_to_jiffies() depend on that. | |
398 | */ | |
399 | BUILD_BUG_ON(HZ > USEC_PER_SEC); | |
400 | ||
401 | #if !(USEC_PER_SEC % HZ) | |
753e9c5c | 402 | return (USEC_PER_SEC / HZ) * j; |
753e9c5c | 403 | #else |
bdc80787 | 404 | # if BITS_PER_LONG == 32 |
b9095fd8 | 405 | return (HZ_TO_USEC_MUL32 * j) >> HZ_TO_USEC_SHR32; |
bdc80787 PA |
406 | # else |
407 | return (j * HZ_TO_USEC_NUM) / HZ_TO_USEC_DEN; | |
408 | # endif | |
753e9c5c ED |
409 | #endif |
410 | } | |
411 | EXPORT_SYMBOL(jiffies_to_usecs); | |
412 | ||
90b6ce9c | 413 | /* |
414 | * mktime64 - Converts date to seconds. | |
415 | * Converts Gregorian date to seconds since 1970-01-01 00:00:00. | |
753be622 TG |
416 | * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 |
417 | * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. | |
418 | * | |
419 | * [For the Julian calendar (which was used in Russia before 1917, | |
420 | * Britain & colonies before 1752, anywhere else before 1582, | |
421 | * and is still in use by some communities) leave out the | |
422 | * -year/100+year/400 terms, and add 10.] | |
423 | * | |
424 | * This algorithm was first published by Gauss (I think). | |
ede5147d DH |
425 | * |
426 | * A leap second can be indicated by calling this function with sec as | |
427 | * 60 (allowable under ISO 8601). The leap second is treated the same | |
428 | * as the following second since they don't exist in UNIX time. | |
429 | * | |
430 | * An encoding of midnight at the end of the day as 24:00:00 - ie. midnight | |
431 | * tomorrow - (allowable under ISO 8601) is supported. | |
753be622 | 432 | */ |
90b6ce9c | 433 | time64_t mktime64(const unsigned int year0, const unsigned int mon0, |
434 | const unsigned int day, const unsigned int hour, | |
435 | const unsigned int min, const unsigned int sec) | |
753be622 | 436 | { |
f4818900 IM |
437 | unsigned int mon = mon0, year = year0; |
438 | ||
439 | /* 1..12 -> 11,12,1..10 */ | |
440 | if (0 >= (int) (mon -= 2)) { | |
441 | mon += 12; /* Puts Feb last since it has leap day */ | |
753be622 TG |
442 | year -= 1; |
443 | } | |
444 | ||
90b6ce9c | 445 | return ((((time64_t) |
753be622 TG |
446 | (year/4 - year/100 + year/400 + 367*mon/12 + day) + |
447 | year*365 - 719499 | |
ede5147d | 448 | )*24 + hour /* now have hours - midnight tomorrow handled here */ |
753be622 TG |
449 | )*60 + min /* now have minutes */ |
450 | )*60 + sec; /* finally seconds */ | |
451 | } | |
90b6ce9c | 452 | EXPORT_SYMBOL(mktime64); |
199e7056 | 453 | |
f8f46da3 TG |
454 | /** |
455 | * ns_to_timespec - Convert nanoseconds to timespec | |
456 | * @nsec: the nanoseconds value to be converted | |
457 | * | |
458 | * Returns the timespec representation of the nsec parameter. | |
459 | */ | |
df869b63 | 460 | struct timespec ns_to_timespec(const s64 nsec) |
f8f46da3 TG |
461 | { |
462 | struct timespec ts; | |
f8bd2258 | 463 | s32 rem; |
f8f46da3 | 464 | |
88fc3897 GA |
465 | if (!nsec) |
466 | return (struct timespec) {0, 0}; | |
467 | ||
f8bd2258 RZ |
468 | ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem); |
469 | if (unlikely(rem < 0)) { | |
470 | ts.tv_sec--; | |
471 | rem += NSEC_PER_SEC; | |
472 | } | |
473 | ts.tv_nsec = rem; | |
f8f46da3 TG |
474 | |
475 | return ts; | |
476 | } | |
85795d64 | 477 | EXPORT_SYMBOL(ns_to_timespec); |
f8f46da3 TG |
478 | |
479 | /** | |
480 | * ns_to_timeval - Convert nanoseconds to timeval | |
481 | * @nsec: the nanoseconds value to be converted | |
482 | * | |
483 | * Returns the timeval representation of the nsec parameter. | |
484 | */ | |
df869b63 | 485 | struct timeval ns_to_timeval(const s64 nsec) |
f8f46da3 TG |
486 | { |
487 | struct timespec ts = ns_to_timespec(nsec); | |
488 | struct timeval tv; | |
489 | ||
490 | tv.tv_sec = ts.tv_sec; | |
491 | tv.tv_usec = (suseconds_t) ts.tv_nsec / 1000; | |
492 | ||
493 | return tv; | |
494 | } | |
b7aa0bf7 | 495 | EXPORT_SYMBOL(ns_to_timeval); |
f8f46da3 | 496 | |
a84d1169 AB |
497 | struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec) |
498 | { | |
499 | struct timespec64 ts = ns_to_timespec64(nsec); | |
500 | struct __kernel_old_timeval tv; | |
501 | ||
502 | tv.tv_sec = ts.tv_sec; | |
503 | tv.tv_usec = (suseconds_t)ts.tv_nsec / 1000; | |
504 | ||
505 | return tv; | |
506 | } | |
507 | EXPORT_SYMBOL(ns_to_kernel_old_timeval); | |
508 | ||
49cd6f86 JS |
509 | /** |
510 | * set_normalized_timespec - set timespec sec and nsec parts and normalize | |
511 | * | |
512 | * @ts: pointer to timespec variable to be set | |
513 | * @sec: seconds to set | |
514 | * @nsec: nanoseconds to set | |
515 | * | |
516 | * Set seconds and nanoseconds field of a timespec variable and | |
517 | * normalize to the timespec storage format | |
518 | * | |
519 | * Note: The tv_nsec part is always in the range of | |
520 | * 0 <= tv_nsec < NSEC_PER_SEC | |
521 | * For negative values only the tv_sec field is negative ! | |
522 | */ | |
523 | void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec) | |
524 | { | |
525 | while (nsec >= NSEC_PER_SEC) { | |
526 | /* | |
527 | * The following asm() prevents the compiler from | |
528 | * optimising this loop into a modulo operation. See | |
529 | * also __iter_div_u64_rem() in include/linux/time.h | |
530 | */ | |
531 | asm("" : "+rm"(nsec)); | |
532 | nsec -= NSEC_PER_SEC; | |
533 | ++sec; | |
534 | } | |
535 | while (nsec < 0) { | |
536 | asm("" : "+rm"(nsec)); | |
537 | nsec += NSEC_PER_SEC; | |
538 | --sec; | |
539 | } | |
540 | ts->tv_sec = sec; | |
541 | ts->tv_nsec = nsec; | |
542 | } | |
543 | EXPORT_SYMBOL(set_normalized_timespec64); | |
544 | ||
545 | /** | |
546 | * ns_to_timespec64 - Convert nanoseconds to timespec64 | |
547 | * @nsec: the nanoseconds value to be converted | |
548 | * | |
549 | * Returns the timespec64 representation of the nsec parameter. | |
550 | */ | |
551 | struct timespec64 ns_to_timespec64(const s64 nsec) | |
552 | { | |
553 | struct timespec64 ts; | |
554 | s32 rem; | |
555 | ||
556 | if (!nsec) | |
557 | return (struct timespec64) {0, 0}; | |
558 | ||
559 | ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem); | |
560 | if (unlikely(rem < 0)) { | |
561 | ts.tv_sec--; | |
562 | rem += NSEC_PER_SEC; | |
563 | } | |
564 | ts.tv_nsec = rem; | |
565 | ||
566 | return ts; | |
567 | } | |
568 | EXPORT_SYMBOL(ns_to_timespec64); | |
abc8f96e | 569 | |
ca42aaf0 NMG |
570 | /** |
571 | * msecs_to_jiffies: - convert milliseconds to jiffies | |
572 | * @m: time in milliseconds | |
573 | * | |
574 | * conversion is done as follows: | |
41cf5445 IM |
575 | * |
576 | * - negative values mean 'infinite timeout' (MAX_JIFFY_OFFSET) | |
577 | * | |
578 | * - 'too large' values [that would result in larger than | |
579 | * MAX_JIFFY_OFFSET values] mean 'infinite timeout' too. | |
580 | * | |
581 | * - all other values are converted to jiffies by either multiplying | |
ca42aaf0 NMG |
582 | * the input value by a factor or dividing it with a factor and |
583 | * handling any 32-bit overflows. | |
584 | * for the details see __msecs_to_jiffies() | |
41cf5445 | 585 | * |
ca42aaf0 NMG |
586 | * msecs_to_jiffies() checks for the passed in value being a constant |
587 | * via __builtin_constant_p() allowing gcc to eliminate most of the | |
588 | * code, __msecs_to_jiffies() is called if the value passed does not | |
589 | * allow constant folding and the actual conversion must be done at | |
590 | * runtime. | |
591 | * the _msecs_to_jiffies helpers are the HZ dependent conversion | |
592 | * routines found in include/linux/jiffies.h | |
41cf5445 | 593 | */ |
ca42aaf0 | 594 | unsigned long __msecs_to_jiffies(const unsigned int m) |
8b9365d7 | 595 | { |
41cf5445 IM |
596 | /* |
597 | * Negative value, means infinite timeout: | |
598 | */ | |
599 | if ((int)m < 0) | |
8b9365d7 | 600 | return MAX_JIFFY_OFFSET; |
ca42aaf0 | 601 | return _msecs_to_jiffies(m); |
8b9365d7 | 602 | } |
ca42aaf0 | 603 | EXPORT_SYMBOL(__msecs_to_jiffies); |
8b9365d7 | 604 | |
ae60d6a0 | 605 | unsigned long __usecs_to_jiffies(const unsigned int u) |
8b9365d7 IM |
606 | { |
607 | if (u > jiffies_to_usecs(MAX_JIFFY_OFFSET)) | |
608 | return MAX_JIFFY_OFFSET; | |
ae60d6a0 | 609 | return _usecs_to_jiffies(u); |
8b9365d7 | 610 | } |
ae60d6a0 | 611 | EXPORT_SYMBOL(__usecs_to_jiffies); |
8b9365d7 IM |
612 | |
613 | /* | |
614 | * The TICK_NSEC - 1 rounds up the value to the next resolution. Note | |
615 | * that a remainder subtract here would not do the right thing as the | |
616 | * resolution values don't fall on second boundries. I.e. the line: | |
617 | * nsec -= nsec % TICK_NSEC; is NOT a correct resolution rounding. | |
d78c9300 AH |
618 | * Note that due to the small error in the multiplier here, this |
619 | * rounding is incorrect for sufficiently large values of tv_nsec, but | |
620 | * well formed timespecs should have tv_nsec < NSEC_PER_SEC, so we're | |
621 | * OK. | |
8b9365d7 IM |
622 | * |
623 | * Rather, we just shift the bits off the right. | |
624 | * | |
625 | * The >> (NSEC_JIFFIE_SC - SEC_JIFFIE_SC) converts the scaled nsec | |
626 | * value to a scaled second value. | |
627 | */ | |
d78c9300 | 628 | static unsigned long |
9ca30850 | 629 | __timespec64_to_jiffies(u64 sec, long nsec) |
8b9365d7 | 630 | { |
d78c9300 | 631 | nsec = nsec + TICK_NSEC - 1; |
8b9365d7 IM |
632 | |
633 | if (sec >= MAX_SEC_IN_JIFFIES){ | |
634 | sec = MAX_SEC_IN_JIFFIES; | |
635 | nsec = 0; | |
636 | } | |
9ca30850 | 637 | return ((sec * SEC_CONVERSION) + |
8b9365d7 IM |
638 | (((u64)nsec * NSEC_CONVERSION) >> |
639 | (NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC; | |
640 | ||
641 | } | |
d78c9300 | 642 | |
9ca30850 BW |
643 | static unsigned long |
644 | __timespec_to_jiffies(unsigned long sec, long nsec) | |
d78c9300 | 645 | { |
9ca30850 | 646 | return __timespec64_to_jiffies((u64)sec, nsec); |
d78c9300 AH |
647 | } |
648 | ||
9ca30850 BW |
649 | unsigned long |
650 | timespec64_to_jiffies(const struct timespec64 *value) | |
651 | { | |
652 | return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec); | |
653 | } | |
654 | EXPORT_SYMBOL(timespec64_to_jiffies); | |
8b9365d7 IM |
655 | |
656 | void | |
9ca30850 | 657 | jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value) |
8b9365d7 IM |
658 | { |
659 | /* | |
660 | * Convert jiffies to nanoseconds and separate with | |
661 | * one divide. | |
662 | */ | |
f8bd2258 RZ |
663 | u32 rem; |
664 | value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC, | |
665 | NSEC_PER_SEC, &rem); | |
666 | value->tv_nsec = rem; | |
8b9365d7 | 667 | } |
9ca30850 | 668 | EXPORT_SYMBOL(jiffies_to_timespec64); |
8b9365d7 | 669 | |
d78c9300 AH |
670 | /* |
671 | * We could use a similar algorithm to timespec_to_jiffies (with a | |
672 | * different multiplier for usec instead of nsec). But this has a | |
673 | * problem with rounding: we can't exactly add TICK_NSEC - 1 to the | |
674 | * usec value, since it's not necessarily integral. | |
675 | * | |
676 | * We could instead round in the intermediate scaled representation | |
677 | * (i.e. in units of 1/2^(large scale) jiffies) but that's also | |
678 | * perilous: the scaling introduces a small positive error, which | |
679 | * combined with a division-rounding-upward (i.e. adding 2^(scale) - 1 | |
680 | * units to the intermediate before shifting) leads to accidental | |
681 | * overflow and overestimates. | |
8b9365d7 | 682 | * |
d78c9300 AH |
683 | * At the cost of one additional multiplication by a constant, just |
684 | * use the timespec implementation. | |
8b9365d7 IM |
685 | */ |
686 | unsigned long | |
687 | timeval_to_jiffies(const struct timeval *value) | |
688 | { | |
d78c9300 AH |
689 | return __timespec_to_jiffies(value->tv_sec, |
690 | value->tv_usec * NSEC_PER_USEC); | |
8b9365d7 | 691 | } |
456a09dc | 692 | EXPORT_SYMBOL(timeval_to_jiffies); |
8b9365d7 IM |
693 | |
694 | void jiffies_to_timeval(const unsigned long jiffies, struct timeval *value) | |
695 | { | |
696 | /* | |
697 | * Convert jiffies to nanoseconds and separate with | |
698 | * one divide. | |
699 | */ | |
f8bd2258 | 700 | u32 rem; |
8b9365d7 | 701 | |
f8bd2258 RZ |
702 | value->tv_sec = div_u64_rem((u64)jiffies * TICK_NSEC, |
703 | NSEC_PER_SEC, &rem); | |
704 | value->tv_usec = rem / NSEC_PER_USEC; | |
8b9365d7 | 705 | } |
456a09dc | 706 | EXPORT_SYMBOL(jiffies_to_timeval); |
8b9365d7 IM |
707 | |
708 | /* | |
709 | * Convert jiffies/jiffies_64 to clock_t and back. | |
710 | */ | |
cbbc719f | 711 | clock_t jiffies_to_clock_t(unsigned long x) |
8b9365d7 IM |
712 | { |
713 | #if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0 | |
6ffc787a DF |
714 | # if HZ < USER_HZ |
715 | return x * (USER_HZ / HZ); | |
716 | # else | |
8b9365d7 | 717 | return x / (HZ / USER_HZ); |
6ffc787a | 718 | # endif |
8b9365d7 | 719 | #else |
71abb3af | 720 | return div_u64((u64)x * TICK_NSEC, NSEC_PER_SEC / USER_HZ); |
8b9365d7 IM |
721 | #endif |
722 | } | |
723 | EXPORT_SYMBOL(jiffies_to_clock_t); | |
724 | ||
725 | unsigned long clock_t_to_jiffies(unsigned long x) | |
726 | { | |
727 | #if (HZ % USER_HZ)==0 | |
728 | if (x >= ~0UL / (HZ / USER_HZ)) | |
729 | return ~0UL; | |
730 | return x * (HZ / USER_HZ); | |
731 | #else | |
8b9365d7 IM |
732 | /* Don't worry about loss of precision here .. */ |
733 | if (x >= ~0UL / HZ * USER_HZ) | |
734 | return ~0UL; | |
735 | ||
736 | /* .. but do try to contain it here */ | |
71abb3af | 737 | return div_u64((u64)x * HZ, USER_HZ); |
8b9365d7 IM |
738 | #endif |
739 | } | |
740 | EXPORT_SYMBOL(clock_t_to_jiffies); | |
741 | ||
742 | u64 jiffies_64_to_clock_t(u64 x) | |
743 | { | |
744 | #if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0 | |
6ffc787a | 745 | # if HZ < USER_HZ |
71abb3af | 746 | x = div_u64(x * USER_HZ, HZ); |
ec03d707 | 747 | # elif HZ > USER_HZ |
71abb3af | 748 | x = div_u64(x, HZ / USER_HZ); |
ec03d707 AM |
749 | # else |
750 | /* Nothing to do */ | |
6ffc787a | 751 | # endif |
8b9365d7 IM |
752 | #else |
753 | /* | |
754 | * There are better ways that don't overflow early, | |
755 | * but even this doesn't overflow in hundreds of years | |
756 | * in 64 bits, so.. | |
757 | */ | |
71abb3af | 758 | x = div_u64(x * TICK_NSEC, (NSEC_PER_SEC / USER_HZ)); |
8b9365d7 IM |
759 | #endif |
760 | return x; | |
761 | } | |
8b9365d7 IM |
762 | EXPORT_SYMBOL(jiffies_64_to_clock_t); |
763 | ||
764 | u64 nsec_to_clock_t(u64 x) | |
765 | { | |
766 | #if (NSEC_PER_SEC % USER_HZ) == 0 | |
71abb3af | 767 | return div_u64(x, NSEC_PER_SEC / USER_HZ); |
8b9365d7 | 768 | #elif (USER_HZ % 512) == 0 |
71abb3af | 769 | return div_u64(x * USER_HZ / 512, NSEC_PER_SEC / 512); |
8b9365d7 IM |
770 | #else |
771 | /* | |
772 | * max relative error 5.7e-8 (1.8s per year) for USER_HZ <= 1024, | |
773 | * overflow after 64.99 years. | |
774 | * exact for HZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ... | |
775 | */ | |
71abb3af | 776 | return div_u64(x * 9, (9ull * NSEC_PER_SEC + (USER_HZ / 2)) / USER_HZ); |
8b9365d7 | 777 | #endif |
8b9365d7 IM |
778 | } |
779 | ||
07e5f5e3 FW |
780 | u64 jiffies64_to_nsecs(u64 j) |
781 | { | |
782 | #if !(NSEC_PER_SEC % HZ) | |
783 | return (NSEC_PER_SEC / HZ) * j; | |
784 | # else | |
785 | return div_u64(j * HZ_TO_NSEC_NUM, HZ_TO_NSEC_DEN); | |
786 | #endif | |
787 | } | |
788 | EXPORT_SYMBOL(jiffies64_to_nsecs); | |
789 | ||
3b15d09f LR |
790 | u64 jiffies64_to_msecs(const u64 j) |
791 | { | |
792 | #if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ) | |
793 | return (MSEC_PER_SEC / HZ) * j; | |
794 | #else | |
795 | return div_u64(j * HZ_TO_MSEC_NUM, HZ_TO_MSEC_DEN); | |
796 | #endif | |
797 | } | |
798 | EXPORT_SYMBOL(jiffies64_to_msecs); | |
799 | ||
b7b20df9 | 800 | /** |
a1dabb6b | 801 | * nsecs_to_jiffies64 - Convert nsecs in u64 to jiffies64 |
b7b20df9 HS |
802 | * |
803 | * @n: nsecs in u64 | |
804 | * | |
805 | * Unlike {m,u}secs_to_jiffies, type of input is not unsigned int but u64. | |
806 | * And this doesn't return MAX_JIFFY_OFFSET since this function is designed | |
807 | * for scheduler, not for use in device drivers to calculate timeout value. | |
808 | * | |
809 | * note: | |
810 | * NSEC_PER_SEC = 10^9 = (5^9 * 2^9) = (1953125 * 512) | |
811 | * ULLONG_MAX ns = 18446744073.709551615 secs = about 584 years | |
812 | */ | |
a1dabb6b | 813 | u64 nsecs_to_jiffies64(u64 n) |
b7b20df9 HS |
814 | { |
815 | #if (NSEC_PER_SEC % HZ) == 0 | |
816 | /* Common case, HZ = 100, 128, 200, 250, 256, 500, 512, 1000 etc. */ | |
817 | return div_u64(n, NSEC_PER_SEC / HZ); | |
818 | #elif (HZ % 512) == 0 | |
819 | /* overflow after 292 years if HZ = 1024 */ | |
820 | return div_u64(n * HZ / 512, NSEC_PER_SEC / 512); | |
821 | #else | |
822 | /* | |
823 | * Generic case - optimized for cases where HZ is a multiple of 3. | |
824 | * overflow after 64.99 years, exact for HZ = 60, 72, 90, 120 etc. | |
825 | */ | |
826 | return div_u64(n * 9, (9ull * NSEC_PER_SEC + HZ / 2) / HZ); | |
827 | #endif | |
828 | } | |
7bd0e226 | 829 | EXPORT_SYMBOL(nsecs_to_jiffies64); |
b7b20df9 | 830 | |
a1dabb6b VP |
831 | /** |
832 | * nsecs_to_jiffies - Convert nsecs in u64 to jiffies | |
833 | * | |
834 | * @n: nsecs in u64 | |
835 | * | |
836 | * Unlike {m,u}secs_to_jiffies, type of input is not unsigned int but u64. | |
837 | * And this doesn't return MAX_JIFFY_OFFSET since this function is designed | |
838 | * for scheduler, not for use in device drivers to calculate timeout value. | |
839 | * | |
840 | * note: | |
841 | * NSEC_PER_SEC = 10^9 = (5^9 * 2^9) = (1953125 * 512) | |
842 | * ULLONG_MAX ns = 18446744073.709551615 secs = about 584 years | |
843 | */ | |
844 | unsigned long nsecs_to_jiffies(u64 n) | |
845 | { | |
846 | return (unsigned long)nsecs_to_jiffies64(n); | |
847 | } | |
d560fed6 | 848 | EXPORT_SYMBOL_GPL(nsecs_to_jiffies); |
a1dabb6b | 849 | |
bc2c53e5 DD |
850 | /* |
851 | * Add two timespec64 values and do a safety check for overflow. | |
852 | * It's assumed that both values are valid (>= 0). | |
853 | * And, each timespec64 is in normalized form. | |
854 | */ | |
855 | struct timespec64 timespec64_add_safe(const struct timespec64 lhs, | |
856 | const struct timespec64 rhs) | |
857 | { | |
858 | struct timespec64 res; | |
859 | ||
469e857f | 860 | set_normalized_timespec64(&res, (timeu64_t) lhs.tv_sec + rhs.tv_sec, |
bc2c53e5 DD |
861 | lhs.tv_nsec + rhs.tv_nsec); |
862 | ||
863 | if (unlikely(res.tv_sec < lhs.tv_sec || res.tv_sec < rhs.tv_sec)) { | |
864 | res.tv_sec = TIME64_MAX; | |
865 | res.tv_nsec = 0; | |
866 | } | |
867 | ||
868 | return res; | |
869 | } | |
f59dd9c8 DD |
870 | |
871 | int get_timespec64(struct timespec64 *ts, | |
ea2ce8f3 | 872 | const struct __kernel_timespec __user *uts) |
f59dd9c8 | 873 | { |
ea2ce8f3 | 874 | struct __kernel_timespec kts; |
f59dd9c8 DD |
875 | int ret; |
876 | ||
877 | ret = copy_from_user(&kts, uts, sizeof(kts)); | |
878 | if (ret) | |
879 | return -EFAULT; | |
880 | ||
881 | ts->tv_sec = kts.tv_sec; | |
ea2ce8f3 DD |
882 | |
883 | /* Zero out the padding for 32 bit systems or in compat mode */ | |
98f76206 | 884 | if (IS_ENABLED(CONFIG_64BIT_TIME) && in_compat_syscall()) |
ea2ce8f3 DD |
885 | kts.tv_nsec &= 0xFFFFFFFFUL; |
886 | ||
f59dd9c8 DD |
887 | ts->tv_nsec = kts.tv_nsec; |
888 | ||
889 | return 0; | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(get_timespec64); | |
892 | ||
893 | int put_timespec64(const struct timespec64 *ts, | |
ea2ce8f3 | 894 | struct __kernel_timespec __user *uts) |
f59dd9c8 | 895 | { |
ea2ce8f3 | 896 | struct __kernel_timespec kts = { |
f59dd9c8 DD |
897 | .tv_sec = ts->tv_sec, |
898 | .tv_nsec = ts->tv_nsec | |
899 | }; | |
ea2ce8f3 | 900 | |
f59dd9c8 DD |
901 | return copy_to_user(uts, &kts, sizeof(kts)) ? -EFAULT : 0; |
902 | } | |
903 | EXPORT_SYMBOL_GPL(put_timespec64); | |
d5b7ffbf | 904 | |
743f5cdb | 905 | static int __get_old_timespec32(struct timespec64 *ts64, |
9afc5eee | 906 | const struct old_timespec32 __user *cts) |
1c68adf6 | 907 | { |
9afc5eee | 908 | struct old_timespec32 ts; |
1c68adf6 DD |
909 | int ret; |
910 | ||
911 | ret = copy_from_user(&ts, cts, sizeof(ts)); | |
912 | if (ret) | |
913 | return -EFAULT; | |
914 | ||
915 | ts64->tv_sec = ts.tv_sec; | |
916 | ts64->tv_nsec = ts.tv_nsec; | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
743f5cdb | 921 | static int __put_old_timespec32(const struct timespec64 *ts64, |
9afc5eee | 922 | struct old_timespec32 __user *cts) |
1c68adf6 | 923 | { |
9afc5eee | 924 | struct old_timespec32 ts = { |
1c68adf6 DD |
925 | .tv_sec = ts64->tv_sec, |
926 | .tv_nsec = ts64->tv_nsec | |
927 | }; | |
928 | return copy_to_user(cts, &ts, sizeof(ts)) ? -EFAULT : 0; | |
929 | } | |
930 | ||
9afc5eee | 931 | int get_old_timespec32(struct timespec64 *ts, const void __user *uts) |
1c68adf6 DD |
932 | { |
933 | if (COMPAT_USE_64BIT_TIME) | |
934 | return copy_from_user(ts, uts, sizeof(*ts)) ? -EFAULT : 0; | |
935 | else | |
9afc5eee | 936 | return __get_old_timespec32(ts, uts); |
1c68adf6 | 937 | } |
9afc5eee | 938 | EXPORT_SYMBOL_GPL(get_old_timespec32); |
1c68adf6 | 939 | |
9afc5eee | 940 | int put_old_timespec32(const struct timespec64 *ts, void __user *uts) |
1c68adf6 DD |
941 | { |
942 | if (COMPAT_USE_64BIT_TIME) | |
943 | return copy_to_user(uts, ts, sizeof(*ts)) ? -EFAULT : 0; | |
944 | else | |
9afc5eee | 945 | return __put_old_timespec32(ts, uts); |
1c68adf6 | 946 | } |
9afc5eee | 947 | EXPORT_SYMBOL_GPL(put_old_timespec32); |
1c68adf6 | 948 | |
d5b7ffbf | 949 | int get_itimerspec64(struct itimerspec64 *it, |
d0dd63a8 | 950 | const struct __kernel_itimerspec __user *uit) |
d5b7ffbf DD |
951 | { |
952 | int ret; | |
953 | ||
954 | ret = get_timespec64(&it->it_interval, &uit->it_interval); | |
955 | if (ret) | |
956 | return ret; | |
957 | ||
958 | ret = get_timespec64(&it->it_value, &uit->it_value); | |
959 | ||
960 | return ret; | |
961 | } | |
962 | EXPORT_SYMBOL_GPL(get_itimerspec64); | |
963 | ||
964 | int put_itimerspec64(const struct itimerspec64 *it, | |
d0dd63a8 | 965 | struct __kernel_itimerspec __user *uit) |
d5b7ffbf DD |
966 | { |
967 | int ret; | |
968 | ||
969 | ret = put_timespec64(&it->it_interval, &uit->it_interval); | |
970 | if (ret) | |
971 | return ret; | |
972 | ||
973 | ret = put_timespec64(&it->it_value, &uit->it_value); | |
974 | ||
975 | return ret; | |
976 | } | |
977 | EXPORT_SYMBOL_GPL(put_itimerspec64); | |
afef05cf | 978 | |
9afc5eee AB |
979 | int get_old_itimerspec32(struct itimerspec64 *its, |
980 | const struct old_itimerspec32 __user *uits) | |
afef05cf DD |
981 | { |
982 | ||
9afc5eee AB |
983 | if (__get_old_timespec32(&its->it_interval, &uits->it_interval) || |
984 | __get_old_timespec32(&its->it_value, &uits->it_value)) | |
afef05cf DD |
985 | return -EFAULT; |
986 | return 0; | |
987 | } | |
9afc5eee | 988 | EXPORT_SYMBOL_GPL(get_old_itimerspec32); |
afef05cf | 989 | |
9afc5eee AB |
990 | int put_old_itimerspec32(const struct itimerspec64 *its, |
991 | struct old_itimerspec32 __user *uits) | |
afef05cf | 992 | { |
9afc5eee AB |
993 | if (__put_old_timespec32(&its->it_interval, &uits->it_interval) || |
994 | __put_old_timespec32(&its->it_value, &uits->it_value)) | |
afef05cf DD |
995 | return -EFAULT; |
996 | return 0; | |
997 | } | |
9afc5eee | 998 | EXPORT_SYMBOL_GPL(put_old_itimerspec32); |