Remove mountedLayer Mount and Unmount

Signed-off-by: Michael Crosby <[email protected]>

Author: crosbymichael

daemon/daemon.go

@@ -277,11 +277,6 @@ func (daemon *Daemon) restore() error {
 			defer wg.Done()
 			rm := c.RestartManager(false)
 			if c.IsRunning() || c.IsPaused() {
-				// Fix activityCount such that graph mounts can be unmounted later
-				if err := daemon.layerStore.ReinitRWLayer(c.RWLayer); err != nil {
-					logrus.Errorf("Failed to ReinitRWLayer for %s due to %s", c.ID, err)
-					return
-				}
 				if err := daemon.containerd.Restore(c.ID, libcontainerd.WithRestartManager(rm)); err != nil {
 					logrus.Errorf("Failed to restore with containerd: %q", err)
 					return

daemon/graphdriver/windows/windows.go

@@ -20,6 +20,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/Microsoft/go-winio"
 	"github.com/Microsoft/go-winio/archive/tar"
 	"github.com/Microsoft/go-winio/backuptar"
 	"github.com/Microsoft/hcsshim"
@@ -31,7 +32,6 @@ import (
 	"github.com/docker/docker/pkg/longpath"
 	"github.com/docker/docker/pkg/reexec"
 	"github.com/docker/docker/pkg/system"
-	"github.com/docker/docker/vendor/src/github.com/Microsoft/go-winio"
 	"github.com/vbatts/tar-split/tar/storage"
 )
 

daemon/graphdriver/zfs/zfs.go

@@ -105,7 +105,7 @@ func Init(base string, opt []string, uidMaps, gidMaps []idtools.IDMap) (graphdri
 		filesystemsCache: filesystemsCache,
 		uidMaps:          uidMaps,
 		gidMaps:          gidMaps,
-		ctr:              graphdriver.NewRefCounter(graphdriver.NewFsChecker(graphdriver.FsMagicZfs)),
+		ctr:              graphdriver.NewRefCounter(graphdriver.NewDefaultChecker()),
 	}
 	return graphdriver.NewNaiveDiffDriver(d, uidMaps, gidMaps), nil
 }

distribution/xfer/download_test.go

@@ -121,10 +121,6 @@ func (ls *mockLayerStore) GetMountID(string) (string, error) {
 	return "", errors.New("not implemented")
 }
 
-func (ls *mockLayerStore) ReinitRWLayer(layer.RWLayer) error {
-	return errors.New("not implemented")
-}
-
 func (ls *mockLayerStore) Cleanup() error {
 	return nil
 }

layer/layer.go

@@ -174,7 +174,6 @@ type Store interface {
 	CreateRWLayer(id string, parent ChainID, mountLabel string, initFunc MountInit, storageOpt map[string]string) (RWLayer, error)
 	GetRWLayer(id string) (RWLayer, error)
 	GetMountID(id string) (string, error)
-	ReinitRWLayer(l RWLayer) error
 	ReleaseRWLayer(RWLayer) ([]Metadata, error)
 
 	Cleanup() error

layer/layer_store.go

@@ -495,19 +495,6 @@ func (ls *layerStore) GetMountID(id string) (string, error) {
 	return mount.mountID, nil
 }
 
-// ReinitRWLayer reinitializes a given mount to the layerstore, specifically
-// initializing the usage count. It should strictly only be used in the
-// daemon's restore path to restore state of live containers.
-func (ls *layerStore) ReinitRWLayer(l RWLayer) error {
-	ls.mountL.Lock()
-	defer ls.mountL.Unlock()
-
-	if _, ok := ls.mounts[l.Name()]; !ok {
-		return ErrMountDoesNotExist
-	}
-	return nil
-}
-
 func (ls *layerStore) ReleaseRWLayer(l RWLayer) ([]Metadata, error) {
 	ls.mountL.Lock()
 	defer ls.mountL.Unlock()

layer/layer_test.go

@@ -174,10 +174,7 @@ func getCachedLayer(l Layer) *roLayer {
 }
 
 func getMountLayer(l RWLayer) *mountedLayer {
-	if rl, ok := l.(*referencedRWLayer); ok {
-		return rl.mountedLayer
-	}
-	return l.(*mountedLayer)
+	return l.(*referencedRWLayer).mountedLayer
 }
 
 func createMetadata(layers ...Layer) []Metadata {

layer/mounted_layer.go

@@ -49,14 +49,6 @@ func (ml *mountedLayer) Parent() Layer {
 	return nil
 }
 
-func (ml *mountedLayer) Mount(mountLabel string) (string, error) {
-	return ml.layerStore.driver.Get(ml.mountID, mountLabel)
-}
-
-func (ml *mountedLayer) Unmount() error {
-	return ml.layerStore.driver.Put(ml.mountID)
-}
-
 func (ml *mountedLayer) Size() (int64, error) {
 	return ml.layerStore.driver.DiffSize(ml.mountID, ml.cacheParent())
 }
@@ -101,11 +93,11 @@ type referencedRWLayer struct {
 }
 
 func (rl *referencedRWLayer) Mount(mountLabel string) (string, error) {
-	return rl.mountedLayer.Mount(mountLabel)
+	return rl.layerStore.driver.Get(rl.mountedLayer.mountID, mountLabel)
 }
 
 // Unmount decrements the activity count and unmounts the underlying layer
 // Callers should only call `Unmount` once per call to `Mount`, even on error.
 func (rl *referencedRWLayer) Unmount() error {
-	return rl.mountedLayer.Unmount()
+	return rl.layerStore.driver.Put(rl.mountedLayer.mountID)
 }