We can use the same data structure to describe both of them.
So that we can handle them similarly.
Fixes: #1566
Signed-off-by: Peng Tao <bergwolf@hyper.sh>
Address some comments:
* fix persist driver func names for better understanding
* modify some logic, add some returned error etc
Signed-off-by: Wei Zhang <zhangwei555@huawei.com>
Fixes#803
The disk persist data should be "versioned" and baselined, any modification in
persist data should be considered potential break of backward compatibility.
Signed-off-by: Wei Zhang <zhangwei555@huawei.com>