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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_TIME_H |
3 | #define _LINUX_TIME_H | |
4 | ||
82644459 | 5 | # include <linux/cache.h> |
57a55875 | 6 | # include <linux/seqlock.h> |
f595ec96 | 7 | # include <linux/math64.h> |
361a3bf0 | 8 | # include <linux/time64.h> |
1da177e4 | 9 | |
b418da16 CH |
10 | extern struct timezone sys_tz; |
11 | ||
f59dd9c8 | 12 | int get_timespec64(struct timespec64 *ts, |
ea2ce8f3 | 13 | const struct __kernel_timespec __user *uts); |
f59dd9c8 | 14 | int put_timespec64(const struct timespec64 *ts, |
ea2ce8f3 | 15 | struct __kernel_timespec __user *uts); |
d5b7ffbf | 16 | int get_itimerspec64(struct itimerspec64 *it, |
d0dd63a8 | 17 | const struct __kernel_itimerspec __user *uit); |
d5b7ffbf | 18 | int put_itimerspec64(const struct itimerspec64 *it, |
d0dd63a8 | 19 | struct __kernel_itimerspec __user *uit); |
f59dd9c8 | 20 | |
90b6ce9c | 21 | extern time64_t mktime64(const unsigned int year, const unsigned int mon, |
22 | const unsigned int day, const unsigned int hour, | |
23 | const unsigned int min, const unsigned int sec); | |
24 | ||
7d27558c | 25 | /* Some architectures do not supply their own clocksource. |
26 | * This is mainly the case in architectures that get their | |
27 | * inter-tick times by reading the counter on their interval | |
28 | * timer. Since these timers wrap every tick, they're not really | |
29 | * useful as clocksources. Wrapping them to act like one is possible | |
30 | * but not very efficient. So we provide a callout these arches | |
31 | * can implement for use with the jiffies clocksource to provide | |
32 | * finer then tick granular time. | |
33 | */ | |
34 | #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET | |
7b1f6207 | 35 | extern u32 (*arch_gettimeoffset)(void); |
7d27558c | 36 | #endif |
37 | ||
1da177e4 | 38 | struct itimerval; |
57a55875 IM |
39 | extern int do_setitimer(int which, struct itimerval *value, |
40 | struct itimerval *ovalue); | |
1da177e4 | 41 | extern int do_getitimer(int which, struct itimerval *value); |
1da177e4 | 42 | |
aaed2dd8 | 43 | extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags); |
1da177e4 | 44 | |
57f1f087 Z |
45 | /* |
46 | * Similar to the struct tm in userspace <time.h>, but it needs to be here so | |
47 | * that the kernel source is self contained. | |
48 | */ | |
49 | struct tm { | |
50 | /* | |
51 | * the number of seconds after the minute, normally in the range | |
52 | * 0 to 59, but can be up to 60 to allow for leap seconds | |
53 | */ | |
54 | int tm_sec; | |
55 | /* the number of minutes after the hour, in the range 0 to 59*/ | |
56 | int tm_min; | |
57 | /* the number of hours past midnight, in the range 0 to 23 */ | |
58 | int tm_hour; | |
59 | /* the day of the month, in the range 1 to 31 */ | |
60 | int tm_mday; | |
61 | /* the number of months since January, in the range 0 to 11 */ | |
62 | int tm_mon; | |
63 | /* the number of years since 1900 */ | |
64 | long tm_year; | |
65 | /* the number of days since Sunday, in the range 0 to 6 */ | |
66 | int tm_wday; | |
67 | /* the number of days since January 1, in the range 0 to 365 */ | |
68 | int tm_yday; | |
69 | }; | |
70 | ||
e6c2682a DD |
71 | void time64_to_tm(time64_t totalsecs, int offset, struct tm *result); |
72 | ||
5dbf2012 | 73 | # include <linux/time32.h> |
8b3d1cda | 74 | |
d5b7ffbf DD |
75 | static inline bool itimerspec64_valid(const struct itimerspec64 *its) |
76 | { | |
77 | if (!timespec64_valid(&(its->it_interval)) || | |
78 | !timespec64_valid(&(its->it_value))) | |
79 | return false; | |
80 | ||
81 | return true; | |
82 | } | |
83 | ||
b5f51573 AD |
84 | /** |
85 | * time_after32 - compare two 32-bit relative times | |
86 | * @a: the time which may be after @b | |
87 | * @b: the time which may be before @a | |
88 | * | |
89 | * time_after32(a, b) returns true if the time @a is after time @b. | |
90 | * time_before32(b, a) returns true if the time @b is before time @a. | |
91 | * | |
92 | * Similar to time_after(), compare two 32-bit timestamps for relative | |
93 | * times. This is useful for comparing 32-bit seconds values that can't | |
94 | * be converted to 64-bit values (e.g. due to disk format or wire protocol | |
95 | * issues) when it is known that the times are less than 68 years apart. | |
96 | */ | |
97 | #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0) | |
98 | #define time_before32(b, a) time_after32(a, b) | |
1da177e4 | 99 | #endif |