[agent] add support nbd device in diskstats (#888)
[agent] add support nbd device in diskstats (#888)

Signed-off-by: XianChaoBo <dcd6fd1596156638bd4b273477ce808661e40b45@bytedance.com>

Co-authored-by: XianChaoBo <dcd6fd1596156638bd4b273477ce808661e40b45@bytedance.com>
open-falcon/falcon-plus,open-falcon/falcon-plus,open-falcon/falcon-plus,open-falcon/falcon-plus,open-falcon/falcon-plus