/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_TIME_H #define _LINUX_TIME_H # include <linux/cache.h> # include <linux/math64.h> # include <linux/time64.h> extern struct timezone sys_tz; int get_timespec64(struct timespec64 *ts, const struct __kernel_timespec __user *uts); int put_timespec64(const struct timespec64 *ts, struct __kernel_timespec __user *uts); int get_itimerspec64(struct itimerspec64 *it, const struct __kernel_itimerspec __user *uit); int put_itimerspec64(const struct itimerspec64 *it, struct __kernel_itimerspec __user *uit); extern time64_t mktime64(const unsigned int year, const unsigned int mon, const unsigned int day, const unsigned int hour, const unsigned int min, const unsigned int sec); #ifdef CONFIG_POSIX_TIMERS extern void clear_itimer(void); #else static inline void clear_itimer(void) {} #endif extern long do_utimes(int dfd, const char __user *filename, struct timespec64 *times, int flags); /* * Similar to the struct tm in userspace <time.h>, but it needs to be here so * that the kernel source is self contained. */ struct tm { /* * the number of seconds after the minute, normally in the range * 0 to 59, but can be up to 60 to allow for leap seconds */ int tm_sec; /* the number of minutes after the hour, in the range 0 to 59*/ int tm_min; /* the number of hours past midnight, in the range 0 to 23 */ int tm_hour; /* the day of the month, in the range 1 to 31 */ int tm_mday; /* the number of months since January, in the range 0 to 11 */ int tm_mon; /* the number of years since 1900 */ long tm_year; /* the number of days since Sunday, in the range 0 to 6 */ int tm_wday; /* the number of days since January 1, in the range 0 to 365 */ int tm_yday; }; void time64_to_tm(time64_t totalsecs, int offset, struct tm *result); # include <linux/time32.h> static inline bool itimerspec64_valid(const struct itimerspec64 *its) { if (!timespec64_valid(&(its->it_interval)) || !timespec64_valid(&(its->it_value))) return false; return true; } /** * time_after32 - compare two 32-bit relative times * @a: the time which may be after @b * @b: the time which may be before @a * * time_after32(a, b) returns true if the time @a is after time @b. * time_before32(b, a) returns true if the time @b is before time @a. * * Similar to time_after(), compare two 32-bit timestamps for relative * times. This is useful for comparing 32-bit seconds values that can't * be converted to 64-bit values (e.g. due to disk format or wire protocol * issues) when it is known that the times are less than 68 years apart. */ #define time_after32(a, b) ((s32)((u32)(b) - (u32)(a)) < 0) #define time_before32(b, a) time_after32(a, b) /** * time_between32 - check if a 32-bit timestamp is within a given time range * @t: the time which may be within [l,h] * @l: the lower bound of the range * @h: the higher bound of the range * * time_before32(t, l, h) returns true if @l <= @t <= @h. All operands are * treated as 32-bit integers. * * Equivalent to !(time_before32(@t, @l) || time_after32(@t, @h)). */ #define time_between32(t, l, h) ((u32)(h) - (u32)(l) >= (u32)(t) - (u32)(l)) # include <vdso/time.h> #endif