Commit 046c59c1 authored Jan 26, 2021 by Jaegeuk Kim Committed by Jaegeuk Kim Feb 01, 2021

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.

Fixes: 4354994f097d ("f2fs: checkpoint disabling")
Cc: stable@vger.kernel.org
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent ff6bdecf

fs/f2fs/super.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1876,6 +1876,9 @@ 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);