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Allow driver to provide changes if it impl the Changer interface

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This commit is contained in:
Michael Crosby 2013-11-08 14:54:20 -08:00
parent f512049c8f
commit 9514767587
5 changed files with 9 additions and 11 deletions
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4
container_test.go
View file

@ -170,11 +170,11 @@ func TestDiff(t *testing.T) {
// Commit the container
rwTar, err := container1.ExportRw()
if err != nil {
t.Error(err)
t.Fatal(err)
}
img, err := runtime.graph.Create(rwTar, container1, "unit test commited image - diff", "", nil)
if err != nil {
t.Error(err)
t.Fatal(err)
}
// Create a new container from the commited image

4
devmapper/driver.go
View file

@ -65,10 +65,6 @@ func (d *Driver) DiffSize(id string) (int64, error) {
return -1, fmt.Errorf("Not implemented")
}
func (d *Driver) Changes(id string) ([]archive.Change, error) {
return nil, fmt.Errorf("Not implemented")
}
func (d *Driver) mount(id, mp string) error {
// Create the target directories if they don't exist
if err := os.MkdirAll(mp, 0755); err != nil && !os.IsExist(err) {

5
graphdriver/driver.go
View file

@ -18,11 +18,14 @@ type Driver interface {
Diff(id string) (archive.Archive, error)
DiffSize(id string) (bytes int64, err error)
Changes(id string) ([]archive.Change, error)
Cleanup() error
}
type Changer interface {
Changes(id string) ([]archive.Change, error)
}
var (
// All registred drivers
drivers map[string]InitFunc

4
graphdriver/dummy/driver.go
View file

@ -80,7 +80,3 @@ func (d *Driver) Diff(id string) (archive.Archive, error) {
func (d *Driver) DiffSize(id string) (int64, error) {
return -1, fmt.Errorf("Not implemented")
}
func (d *Driver) Changes(id string) ([]archive.Change, error) {
return nil, fmt.Errorf("Not implemented")
}

3
runtime.go
View file

@ -733,6 +733,9 @@ func (runtime *Runtime) Unmount(container *Container) error {
}
func (runtime *Runtime) Changes(container *Container) ([]archive.Change, error) {
if changer, ok := runtime.driver.(graphdriver.Changer); ok {
return changer.Changes(container.ID)
}
cDir, err := runtime.driver.Get(container.ID)
if err != nil {
return nil, fmt.Errorf("Error getting container rootfs %s from driver %s: %s", container.ID, container.runtime.driver, err)