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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:40 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:40 +0000 |
commit | 8b0a8165cdad0f4133837d753649ef4682e42c3b (patch) | |
tree | 5c58f869f31ddb1f7bd6e8bdea269b680b36c5b6 /fs/ntfs/time.h | |
parent | Releasing progress-linux version 6.8.12-1~progress7.99u1. (diff) | |
download | linux-8b0a8165cdad0f4133837d753649ef4682e42c3b.tar.xz linux-8b0a8165cdad0f4133837d753649ef4682e42c3b.zip |
Merging upstream version 6.9.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/ntfs/time.h')
-rw-r--r-- | fs/ntfs/time.h | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/fs/ntfs/time.h b/fs/ntfs/time.h deleted file mode 100644 index 6b63261300..0000000000 --- a/fs/ntfs/time.h +++ /dev/null @@ -1,89 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* - * time.h - NTFS time conversion functions. Part of the Linux-NTFS project. - * - * Copyright (c) 2001-2005 Anton Altaparmakov - */ - -#ifndef _LINUX_NTFS_TIME_H -#define _LINUX_NTFS_TIME_H - -#include <linux/time.h> /* For current_kernel_time(). */ -#include <asm/div64.h> /* For do_div(). */ - -#include "endian.h" - -#define NTFS_TIME_OFFSET ((s64)(369 * 365 + 89) * 24 * 3600 * 10000000) - -/** - * utc2ntfs - convert Linux UTC time to NTFS time - * @ts: Linux UTC time to convert to NTFS time - * - * Convert the Linux UTC time @ts to its corresponding NTFS time and return - * that in little endian format. - * - * Linux stores time in a struct timespec64 consisting of a time64_t tv_sec - * and a long tv_nsec where tv_sec is the number of 1-second intervals since - * 1st January 1970, 00:00:00 UTC and tv_nsec is the number of 1-nano-second - * intervals since the value of tv_sec. - * - * NTFS uses Microsoft's standard time format which is stored in a s64 and is - * measured as the number of 100-nano-second intervals since 1st January 1601, - * 00:00:00 UTC. - */ -static inline sle64 utc2ntfs(const struct timespec64 ts) -{ - /* - * Convert the seconds to 100ns intervals, add the nano-seconds - * converted to 100ns intervals, and then add the NTFS time offset. - */ - return cpu_to_sle64((s64)ts.tv_sec * 10000000 + ts.tv_nsec / 100 + - NTFS_TIME_OFFSET); -} - -/** - * get_current_ntfs_time - get the current time in little endian NTFS format - * - * Get the current time from the Linux kernel, convert it to its corresponding - * NTFS time and return that in little endian format. - */ -static inline sle64 get_current_ntfs_time(void) -{ - struct timespec64 ts; - - ktime_get_coarse_real_ts64(&ts); - return utc2ntfs(ts); -} - -/** - * ntfs2utc - convert NTFS time to Linux time - * @time: NTFS time (little endian) to convert to Linux UTC - * - * Convert the little endian NTFS time @time to its corresponding Linux UTC - * time and return that in cpu format. - * - * Linux stores time in a struct timespec64 consisting of a time64_t tv_sec - * and a long tv_nsec where tv_sec is the number of 1-second intervals since - * 1st January 1970, 00:00:00 UTC and tv_nsec is the number of 1-nano-second - * intervals since the value of tv_sec. - * - * NTFS uses Microsoft's standard time format which is stored in a s64 and is - * measured as the number of 100 nano-second intervals since 1st January 1601, - * 00:00:00 UTC. - */ -static inline struct timespec64 ntfs2utc(const sle64 time) -{ - struct timespec64 ts; - - /* Subtract the NTFS time offset. */ - u64 t = (u64)(sle64_to_cpu(time) - NTFS_TIME_OFFSET); - /* - * Convert the time to 1-second intervals and the remainder to - * 1-nano-second intervals. - */ - ts.tv_nsec = do_div(t, 10000000) * 100; - ts.tv_sec = t; - return ts; -} - -#endif /* _LINUX_NTFS_TIME_H */ |