From: Frank Sorenson <sorenson@redhat.com>
To: linux-fsdevel@vger.kernel.org
Cc: hirofumi@mail.parknet.co.jp
Subject: [PATCH V3 0/4] fat: timestamp updates
Date: Sat, 22 Sep 2018 15:19:55 -0500 [thread overview]
Message-ID: <20180922201959.10477-1-sorenson@redhat.com> (raw)
vfat/msdos timestamps are stored on-disk with several different
granularities, some of them lower resolution than timespec_trunc()
can provide. In addition, they are only truncated as they are
written to disk, so the timestamps in-memory for new or modified
files/directories may be different from the same timestamps after
a remount, as the now-truncated times are re-read from the on-disk
format.
These patches allow finer granularity for the timestamps where
possible and add fat-specific ->update_time inode operation and
fat_truncate_time functions to truncate each timestamp correctly,
giving consistent times across remounts.
Frank Sorenson (4):
fat: set the s_time_gran for msdos or vfat mounts
fat: create function to calculate timezone offset
fat: add functions to update and truncate the timestamps appropriately
fat: change timestamp updates to fat_update_time or fat_truncate_time
fs/fat/dir.c | 2 +-
fs/fat/fat.h | 14 ++++++++++
fs/fat/file.c | 18 ++++++++++---
fs/fat/inode.c | 6 ++---
fs/fat/misc.c | 74 +++++++++++++++++++++++++++++++++++++++++++++-------
fs/fat/namei_msdos.c | 17 ++++++------
fs/fat/namei_vfat.c | 15 ++++++-----
7 files changed, 114 insertions(+), 32 deletions(-)
--
2.13.6
next reply other threads:[~2018-09-23 2:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-22 20:19 Frank Sorenson [this message]
2018-09-22 20:19 ` [PATCH 1/4] fat: set the s_time_gran for msdos or vfat mounts Frank Sorenson
2018-09-22 20:19 ` [PATCH 2/4] fat: create function to calculate timezone offset Frank Sorenson
2018-09-22 20:19 ` [PATCH 3/4] fat: add functions to update and truncate the timestamps appropriately Frank Sorenson
2018-09-22 20:19 ` [PATCH 4/4] fat: change timestamp updates to fat_update_time or fat_truncate_time Frank Sorenson
2018-09-23 10:31 ` [PATCH V3 0/4] fat: timestamp updates OGAWA Hirofumi
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