| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _LINUX_TIME_H |
| 3 | #define _LINUX_TIME_H |
| 4 | |
| 5 | # include <linux/cache.h> |
| 6 | # include <linux/math64.h> |
| 7 | # include <linux/time64.h> |
| 8 | |
| 9 | extern struct timezone sys_tz; |
| 10 | |
| 11 | int get_timespec64(struct timespec64 *ts, |
| 12 | const struct __kernel_timespec __user *uts); |
| 13 | int put_timespec64(const struct timespec64 *ts, |
| 14 | struct __kernel_timespec __user *uts); |
| 15 | int get_itimerspec64(struct itimerspec64 *it, |
| 16 | const struct __kernel_itimerspec __user *uit); |
| 17 | int put_itimerspec64(const struct itimerspec64 *it, |
| 18 | struct __kernel_itimerspec __user *uit); |
| 19 | |
| 20 | extern time64_t mktime64(const unsigned int year, const unsigned int mon, |
| 21 | const unsigned int day, const unsigned int hour, |
| 22 | const unsigned int min, const unsigned int sec); |
| 23 | |
| 24 | #ifdef CONFIG_POSIX_TIMERS |
| 25 | extern void clear_itimer(void); |
| 26 | #else |
| 27 | static inline void clear_itimer(void) {} |
| 28 | #endif |
| 29 | |
| 30 | extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags); |
| 31 | |
| 32 | /* |
| 33 | * Similar to the struct tm in userspace <time.h>, but it needs to be here so |
| 34 | * that the kernel source is self contained. |
| 35 | */ |
| 36 | struct tm { |
| 37 | /* |
| 38 | * the number of seconds after the minute, normally in the range |
| 39 | * 0 to 59, but can be up to 60 to allow for leap seconds |
| 40 | */ |
| 41 | int tm_sec; |
| 42 | /* the number of minutes after the hour, in the range 0 to 59*/ |
| 43 | int tm_min; |
| 44 | /* the number of hours past midnight, in the range 0 to 23 */ |
| 45 | int tm_hour; |
| 46 | /* the day of the month, in the range 1 to 31 */ |
| 47 | int tm_mday; |
| 48 | /* the number of months since January, in the range 0 to 11 */ |
| 49 | int tm_mon; |
| 50 | /* the number of years since 1900 */ |
| 51 | long tm_year; |
| 52 | /* the number of days since Sunday, in the range 0 to 6 */ |
| 53 | int tm_wday; |
| 54 | /* the number of days since January 1, in the range 0 to 365 */ |
| 55 | int tm_yday; |
| 56 | }; |
| 57 | |
| 58 | void time64_to_tm(time64_t totalsecs, int offset, struct tm *result); |
| 59 | |
| 60 | # include <linux/time32.h> |
| 61 | |
| 62 | static inline bool itimerspec64_valid(const struct itimerspec64 *its) |
| 63 | { |
| 64 | if (!timespec64_valid(&(its->it_interval)) || |
| 65 | !timespec64_valid(&(its->it_value))) |
| 66 | return false; |
| 67 | |
| 68 | return true; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * time_after32 - compare two 32-bit relative times |
| 73 | * @a: the time which may be after @b |
| 74 | * @b: the time which may be before @a |
| 75 | * |
| 76 | * time_after32(a, b) returns true if the time @a is after time @b. |
| 77 | * time_before32(b, a) returns true if the time @b is before time @a. |
| 78 | * |
| 79 | * Similar to time_after(), compare two 32-bit timestamps for relative |
| 80 | * times. This is useful for comparing 32-bit seconds values that can't |
| 81 | * be converted to 64-bit values (e.g. due to disk format or wire protocol |
| 82 | * issues) when it is known that the times are less than 68 years apart. |
| 83 | */ |
| 84 | #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0) |
| 85 | #define time_before32(b, a) time_after32(a, b) |
| 86 | |
| 87 | /** |
| 88 | * time_between32 - check if a 32-bit timestamp is within a given time range |
| 89 | * @t: the time which may be within [l,h] |
| 90 | * @l: the lower bound of the range |
| 91 | * @h: the higher bound of the range |
| 92 | * |
| 93 | * time_before32(t, l, h) returns true if @l <= @t <= @h. All operands are |
| 94 | * treated as 32-bit integers. |
| 95 | * |
| 96 | * Equivalent to !(time_before32(@t, @l) || time_after32(@t, @h)). |
| 97 | */ |
| 98 | #define time_between32(t, l, h) ((u32)(h) - (u32)(l) >= (u32)(t) - (u32)(l)) |
| 99 | |
| 100 | # include <vdso/time.h> |
| 101 | |
| 102 | #endif |