Commit d7b2931c authored Jan 26, 2021 by Jaegeuk Kim

FROMGIT: f2fs: flush data when enabling checkpoint back



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: 4354994f ("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

parent 601b2ed3

fs/f2fs/super.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1780,6 +1780,9 @@ 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);