NewDmSetupClient returns a new DmsetupClient.

NewThinPoolWatcher returns a new ThinPoolWatcher for the given devicemapper thin pool name and metadata device or an error.

ThinLsBinaryPresent returns the location of the thin_ls binary in the mount namespace cadvisor is running in or an error.

ThinPoolWatcher maintains a cache of device name -> usage stats for a devicemapper thin-pool using thin_ls.

DmsetupClient is a low-level client for interacting with device mapper via the `dmsetup` utility, which is provided by the `device-mapper` package.