Separate fat_truncate_time() to each timestamps for later creation time
work.
This patch does not introduce any functional changes, it's merely
refactoring change.
Signed-off-by: Chung-Chiang Cheng <cccheng@xxxxxxxxxxxx>
---
fs/fat/fat.h | 6 +++++
fs/fat/misc.c | 74 ++++++++++++++++++++++++++++++++-------------------
2 files changed, 53 insertions(+), 27 deletions(-)
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 02d4d4234956..6b04aa623b3b 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -446,6 +446,12 @@ extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts,
__le16 __time, __le16 __date, u8 time_cs);
extern void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts,
__le16 *time, __le16 *date, u8 *time_cs);
+extern struct timespec64 fat_truncate_atime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts);
+extern struct timespec64 fat_truncate_crtime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts);
+extern struct timespec64 fat_truncate_mtime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts);
extern int fat_truncate_time(struct inode *inode, struct timespec64 *now,
int flags);
extern int fat_update_time(struct inode *inode, struct timespec64 *now,
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 91ca3c304211..63160e47be00 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -187,7 +187,7 @@ static long days_in_year[] = {
0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0,
};
-static inline int fat_tz_offset(struct msdos_sb_info *sbi)
+static inline int fat_tz_offset(const struct msdos_sb_info *sbi)
{
return (sbi->options.tz_set ?
-sbi->options.time_offset :
@@ -282,16 +282,49 @@ static inline struct timespec64 fat_timespec64_trunc_10ms(struct timespec64 ts)
return ts;
}
+/*
+ * truncate atime to 24 hour granularity (00:00:00 in local timezone)
+ */
+struct timespec64 fat_truncate_atime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts)
+{
+ /* to localtime */
+ time64_t seconds = ts->tv_sec - fat_tz_offset(sbi);
+ s32 remainder;
+
+ div_s64_rem(seconds, SECS_PER_DAY, &remainder);
+ /* to day boundary, and back to unix time */
+ seconds = seconds + fat_tz_offset(sbi) - remainder;
+
+ return (struct timespec64){ seconds, 0 };
+}
+
+/*
+ * truncate creation time with appropriate granularity:
+ * msdos - 2 seconds
+ * vfat - 10 milliseconds
+ */
+struct timespec64 fat_truncate_crtime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts)
+{
+ if (sbi->options.isvfat)
+ return fat_timespec64_trunc_10ms(*ts);
+ else
+ return fat_timespec64_trunc_2secs(*ts);
+}
+
+/*
+ * truncate mtime to 2 second granularity
+ */
+struct timespec64 fat_truncate_mtime(const struct msdos_sb_info *sbi,
+ const struct timespec64 *ts)
+{
+ return fat_timespec64_trunc_2secs(*ts);
+}
+
/*
* truncate the various times with appropriate granularity:
- * root inode:
- * all times always 0
- * all other inodes:
- * mtime - 2 seconds
- * ctime
- * msdos - 2 seconds
- * vfat - 10 milliseconds
- * atime - 24 hours (00:00:00 in local timezone)
+ * all times in root node are always 0
*/
int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
{
@@ -306,25 +339,12 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
ts = current_time(inode);
}
- if (flags & S_ATIME) {
- /* to localtime */
- time64_t seconds = now->tv_sec - fat_tz_offset(sbi);
- s32 remainder;
-
- div_s64_rem(seconds, SECS_PER_DAY, &remainder);
- /* to day boundary, and back to unix time */
- seconds = seconds + fat_tz_offset(sbi) - remainder;
-
- inode->i_atime = (struct timespec64){ seconds, 0 };
- }
- if (flags & S_CTIME) {
- if (sbi->options.isvfat)
- inode->i_ctime = fat_timespec64_trunc_10ms(*now);
- else
- inode->i_ctime = fat_timespec64_trunc_2secs(*now);
- }
+ if (flags & S_ATIME)
+ inode->i_atime = fat_truncate_atime(sbi, now);
+ if (flags & S_CTIME)
+ inode->i_ctime = fat_truncate_crtime(sbi, now);
if (flags & S_MTIME)
- inode->i_mtime = fat_timespec64_trunc_2secs(*now);
+ inode->i_mtime = fat_truncate_mtime(sbi, now);
return 0;
}
--
2.34.1
