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(ts: &(its->it_interval)) || |
65 | !timespec64_valid(ts: &(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 |
103 | |