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FROMGIT: f2fs: flush data when enabling checkpoint back

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During checkpoint=disable period, f2fs bypasses all the synchronous IOs such as
sync and fsync. So, when enabling it back, we must flush all of them in order
to keep the data persistent. Otherwise, suddern power-cut right after enabling
checkpoint will cause data loss.

Bug: 171063590
Fixes: 4354994f09 ("f2fs: checkpoint disabling")
Cc: stable@vger.kernel.org
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 8d52dbb373579b48f5758dd0cdd2ac0fb4e5be7f git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev)
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Iaca2d6fc1841fffa8677d5d592732c94241fb3fb
This commit is contained in:
Jaegeuk Kim 2021-01-26 17:00:42 -08:00 committed by Jaegeuk Kim
parent d8895b745f
commit 9c694f73e7
1 changed files with 3 additions and 0 deletions
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3
fs/f2fs/super.c
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@ -1796,6 +1796,9 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
{
/* we should flush all the data to keep data consistency */
sync_inodes_sb(sbi->sb);
down_write(&sbi->gc_lock);
f2fs_dirty_to_prefree(sbi);