diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-08-18 22:40:09 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2022-09-12 23:07:20 -0700 |
| commit | 4f99484d27961cb194cebcd917176fa038a5025f (patch) | |
| tree | 656b81e8ba684b5ac79f7e9772538a723e88669e /fs/f2fs | |
| parent | c7b58576370147833999fd4cc874d0f918bdf9ca (diff) | |
f2fs: complete checkpoints during remount
Otherwise, pending checkpoints can contribute a race condition to give a
quota warning.
- Thread - checkpoint thread
add checkpoints to the list
do_remount()
down_write(&sb->s_umount);
f2fs_remount()
block_operations()
down_read_trylock(&sb->s_umount) = 0
up_write(&sb->s_umount);
f2fs_quota_sync()
dquot_writeback_dquots()
WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount));
Or,
do_remount()
down_write(&sb->s_umount);
f2fs_remount()
create a ckpt thread
f2fs_enable_checkpoint() adds checkpoints
wait for f2fs_sync_fs()
trigger another pending checkpoint
block_operations()
down_read_trylock(&sb->s_umount) = 0
up_write(&sb->s_umount);
f2fs_quota_sync()
dquot_writeback_dquots()
WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount));
Cc: stable@vger.kernel.org
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/super.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 4f2ff50b247c..0f29c759a898 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2185,6 +2185,9 @@ static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi) f2fs_up_write(&sbi->gc_lock); f2fs_sync_fs(sbi->sb, 1); + + /* Let's ensure there's no pending checkpoint anymore */ + f2fs_flush_ckpt_thread(sbi); } static int f2fs_remount(struct super_block *sb, int *flags, char *data) @@ -2350,6 +2353,9 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) f2fs_stop_ckpt_thread(sbi); need_restart_ckpt = true; } else { + /* Flush if the prevous checkpoint, if exists. */ + f2fs_flush_ckpt_thread(sbi); + err = f2fs_start_ckpt_thread(sbi); if (err) { f2fs_err(sbi, |