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moby--moby/daemon/daemon_aufs.go

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// +build !exclude_graphdriver_aufs
package daemon
import (
"github.com/Sirupsen/logrus"
"github.com/docker/docker/daemon/graphdriver"
"github.com/docker/docker/daemon/graphdriver/aufs"
"github.com/docker/docker/graph"
)
// Given the graphdriver ad, if it is aufs, then migrate it.
// If aufs driver is not built, this func is a noop.
func migrateIfAufs(driver graphdriver.Driver, root string) error {
if ad, ok := driver.(*aufs.Driver); ok {
logrus.Debugf("Migrating existing containers")
if err := ad.Migrate(root, graph.SetupInitLayer); err != nil {
return err
}
}
return nil
}