From: Frank Sorenson <sorenson@redhat.com>
To: linux-fsdevel@vger.kernel.org
Cc: hirofumi@mail.parknet.co.jp
Subject: [PATCH V4 0/4] fat: timestamp updates
Date: Wed, 26 Sep 2018 17:43:31 -0500 [thread overview]
Message-ID: <20180926224335.5919-1-sorenson@redhat.com> (raw)
fat/msdos timestamps are stored on-disk with several different
granularities, some of them lower resolution than timespec64_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.
V4 changes
corrected to use fat_truncate_time() and keep mark_inode_dirty()
set s_time_gran to 1ns unconditionally
add i_version support to update_time()
fix atime bug with localtime
Frank Sorenson (4):
fat: create a function to calculate the timezone offest
fat: add functions to update and truncate timestamps appropriately
fat: change timestamp updates to use fat_truncate_time
fat: truncate inode timestamp updates in setattr
fs/fat/dir.c | 2 +-
fs/fat/fat.h | 2 ++
fs/fat/file.c | 17 ++++++++--
fs/fat/inode.c | 9 ++++--
fs/fat/misc.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++----
fs/fat/namei_msdos.c | 17 +++++-----
fs/fat/namei_vfat.c | 15 +++++----
7 files changed, 126 insertions(+), 27 deletions(-)
--
2.14.4
next reply other threads:[~2018-09-27 4:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 22:43 Frank Sorenson [this message]
2018-09-26 22:43 ` [PATCH V4 1/4] fat: create a function to calculate the timezone offest Frank Sorenson
2018-09-26 22:43 ` [PATCH V2 2/4] fat: add functions to update and truncate timestamps appropriately Frank Sorenson
2018-09-28 10:31 ` OGAWA Hirofumi
2018-09-26 22:43 ` [PATCH V4 3/4] fat: change timestamp updates to use fat_truncate_time Frank Sorenson
2018-09-26 22:43 ` [PATCH V4 4/4] fat: truncate inode timestamp updates in setattr Frank Sorenson
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