From d47298cd4dd1031018197dbbfc98d97c6db1e713 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Tue, 26 Jan 2021 17:00:42 -0800 Subject: [PATCH] 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: 4354994f097d ("f2fs: checkpoint disabling") Cc: stable@vger.kernel.org Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim (cherry picked from commit 8d52dbb373579b48f5758dd0cdd2ac0fb4e5be7f git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev) Signed-off-by: Jaegeuk Kim Change-Id: Iaca2d6fc1841fffa8677d5d592732c94241fb3fb --- fs/f2fs/super.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 70e6a0844c6b..dd46893138b3 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1731,6 +1731,9 @@ 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);