diff options
| author | Eric Sandeen <sandeen@sandeen.net> | 2020-04-21 05:13:10 +0300 |
|---|---|---|
| committer | Namjae Jeon <namjae.jeon@samsung.com> | 2020-04-22 14:14:06 +0300 |
| commit | 81df1ad40644b706a1cdbd28a1471f9f0c0ea3e8 (patch) | |
| tree | f91eeffa36abcb5b6c9c67ce33b8e24e07f576d7 /fs/exfat/misc.c | |
| parent | 674a9985b8e35288225f2b67829a7dee3bf761da (diff) | |
| download | linux-81df1ad40644b706a1cdbd28a1471f9f0c0ea3e8.tar.xz | |
exfat: truncate atimes to 2s granularity
The timestamp for access_time has double seconds granularity(There is no
10msIncrement field for access_time unlike create/modify_time).
exfat's atimes are restricted to only 2s granularity so after
we set an atime, round it down to the nearest 2s and set the
sub-second component of the timestamp to 0.
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Diffstat (limited to 'fs/exfat/misc.c')
| -rw-r--r-- | fs/exfat/misc.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/exfat/misc.c b/fs/exfat/misc.c index 14a3300848f6..ebd2cbe3cbc1 100644 --- a/fs/exfat/misc.c +++ b/fs/exfat/misc.c @@ -88,7 +88,8 @@ void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, if (time_ms) { ts->tv_sec += time_ms / 100; ts->tv_nsec = (time_ms % 100) * 10 * NSEC_PER_MSEC; - } + } else + ts->tv_nsec = 0; if (tz & EXFAT_TZ_VALID) /* Adjust timezone to UTC0. */ @@ -124,6 +125,17 @@ void exfat_set_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts, *tz = EXFAT_TZ_VALID; } +/* + * The timestamp for access_time has double seconds granularity. + * (There is no 10msIncrement field for access_time unlike create/modify_time) + * atime also has only a 2-second resolution. + */ +void exfat_truncate_atime(struct timespec64 *ts) +{ + ts->tv_sec = round_down(ts->tv_sec, 2); + ts->tv_nsec = 0; +} + unsigned short exfat_calc_chksum_2byte(void *data, int len, unsigned short chksum, int type) { |