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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> |
f595ec96 | 6 | # include <linux/math64.h> |
361a3bf0 | 7 | # include <linux/time64.h> |
1da177e4 | 8 | |
b418da16 CH |
9 | extern struct timezone sys_tz; |
10 | ||
f59dd9c8 | 11 | int get_timespec64(struct timespec64 *ts, |
ea2ce8f3 | 12 | const struct __kernel_timespec __user *uts); |
f59dd9c8 | 13 | int put_timespec64(const struct timespec64 *ts, |
ea2ce8f3 | 14 | struct __kernel_timespec __user *uts); |
d5b7ffbf | 15 | int get_itimerspec64(struct itimerspec64 *it, |
d0dd63a8 | 16 | const struct __kernel_itimerspec __user *uit); |
d5b7ffbf | 17 | int put_itimerspec64(const struct itimerspec64 *it, |
d0dd63a8 | 18 | struct __kernel_itimerspec __user *uit); |
f59dd9c8 | 19 | |
90b6ce9c | 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 | ||
ddbc7d06 AB |
24 | #ifdef CONFIG_POSIX_TIMERS |
25 | extern void clear_itimer(void); | |
26 | #else | |
27 | static inline void clear_itimer(void) {} | |
28 | #endif | |
1da177e4 | 29 | |
aaed2dd8 | 30 | extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags); |
1da177e4 | 31 | |
57f1f087 Z |
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 | ||
e6c2682a DD |
58 | void time64_to_tm(time64_t totalsecs, int offset, struct tm *result); |
59 | ||
5dbf2012 | 60 | # include <linux/time32.h> |
8b3d1cda | 61 | |
d5b7ffbf DD |
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 | ||
b5f51573 AD |
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) | |
04d26e7b GN |
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)) | |
660fd04f | 99 | |
639fff1c | 100 | # include <vdso/time.h> |
660fd04f | 101 | |
1da177e4 | 102 | #endif |