1 files changed, 102 insertions, 0 deletions
diff --git a/include/linux/time.h b/include/linux/time.h
new file mode 100644
index 000000000..16cf4522d
--- /dev/null
+++ b/include/linux/time.h
@@ -0,0 +1,102 @@
+/* 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