// Count returns the usage count of the passed in volume
func (s *volumeStore) Count(v volume.Volume) int {
vc, exists := s.vols[v.Name()]
if !exists {
return 0
}
return vc.count
}
func removeVolume(v volume.Volume) error {
vd, err := getVolumeDriver(v.DriverName())
if err != nil {
return nil
}
return vd.Remove(v)
}
// Remove deletes a volume.
func (d *FakeDriver) Remove(v volume.Volume) error {
if _, exists := d.vols[v.Name()]; !exists {
return fmt.Errorf("no such volume")
}
delete(d.vols, v.Name())
return nil
}
// volumeExists returns if the volume is still present in the driver.
// An error is returned if there was an issue communicating with the driver.
func volumeExists(v volume.Volume) (bool, error) {
exists, err := lookupVolume(v.DriverName(), v.Name())
if err != nil {
return false, err
}
return exists != nil, nil
}
// Remove removes the requested volume. A volume is not removed if the usage count is > 0
func (s *VolumeStore) Remove(v volume.Volume) error {
name := normaliseVolumeName(v.Name())
s.locks.Lock(name)
defer s.locks.Unlock(name)
logrus.Debugf("Removing volume reference: driver %s, name %s", v.DriverName(), name)
vc, exists := s.get(name)
if !exists {
return ErrNoSuchVolume
}
if vc.count > 0 {
return ErrVolumeInUse
}
vd, err := volumedrivers.GetDriver(vc.DriverName())
if err != nil {
return err
}
if err := vd.Remove(vc.Volume); err != nil {
return err
}
s.remove(name)
return nil
}
// Refs gets the current list of refs for the given volume
func (s *VolumeStore) Refs(v volume.Volume) []string {
name := v.Name()
s.locks.Lock(name)
defer s.locks.Unlock(name)
return s.getRefs(name)
}
// Count returns the usage count of the passed in volume
func (s *VolumeStore) Count(v volume.Volume) uint {
s.mu.Lock()
defer s.mu.Unlock()
vc, exists := s.vols[normaliseVolumeName(v.Name())]
if !exists {
return 0
}
return vc.count
}
// Count returns the usage count of the passed in volume
func (s *volumeStore) Count(v volume.Volume) int {
s.mu.Lock()
defer s.mu.Unlock()
vc, exists := s.vols[v.Name()]
if !exists {
return 0
}
return vc.count
}
func (container *Container) addMountPointWithVolume(destination string, vol volume.Volume, rw bool) {
container.MountPoints[destination] = &mountPoint{
Name: vol.Name(),
Driver: vol.DriverName(),
Destination: destination,
RW: rw,
Volume: vol,
}
}
// AddMountPointWithVolume adds a new mount point configured with a volume to the container.
func (container *Container) AddMountPointWithVolume(destination string, vol volume.Volume, rw bool) {
container.MountPoints[destination] = &volume.MountPoint{
Name: vol.Name(),
Driver: vol.DriverName(),
Destination: destination,
RW: rw,
Volume: vol,
CopyData: volume.DefaultCopyMode,
}
}
// Count returns the usage count of the passed in volume
func (s *VolumeStore) Count(v volume.Volume) uint {
name := normaliseVolumeName(v.Name())
s.locks.Lock(name)
defer s.locks.Unlock(name)
vc, exists := s.get(name)
if !exists {
return 0
}
return vc.count
}
// Decrement decrements the usage count of the passed in volume by 1
func (s *volumeStore) Decrement(v volume.Volume) {
s.mu.Lock()
defer s.mu.Unlock()
vc, exists := s.vols[v.Name()]
if !exists {
return
}
vc.count--
return
}
// Increment increments the usage count of the passed in volume by 1
func (s *volumeStore) Increment(v volume.Volume) {
s.mu.Lock()
defer s.mu.Unlock()
vc, exists := s.vols[v.Name()]
if !exists {
s.vols[v.Name()] = &volumeCounter{v, 1}
return
}
vc.count++
return
}
// Dereference removes the specified reference to the volume
func (s *VolumeStore) Dereference(v volume.Volume, ref string) {
name := v.Name()
s.locks.Lock(name)
defer s.locks.Unlock(name)
s.globalLock.Lock()
defer s.globalLock.Unlock()
if s.refs[name] != nil {
delete(s.refs[name], ref)
}
}
// volumeToAPIType converts a volume.Volume to the type used by the remote API
func volumeToAPIType(v volume.Volume) *types.Volume {
tv := &types.Volume{
Name: v.Name(),
Driver: v.DriverName(),
}
if v, ok := v.(volume.DetailedVolume); ok {
tv.Labels = v.Labels()
tv.Options = v.Options()
tv.Scope = v.Scope()
}
return tv
}
func (s *VolumeStore) setNamed(v volume.Volume, ref string) {
name := v.Name()
s.globalLock.Lock()
s.names[name] = v
if len(ref) > 0 {
if s.refs[name] == nil {
s.refs[name] = make(map[string]struct{})
}
s.refs[name][ref] = struct{}{}
}
s.globalLock.Unlock()
}
// Increment increments the usage count of the passed in volume by 1
func (s *VolumeStore) Increment(v volume.Volume) {
s.mu.Lock()
defer s.mu.Unlock()
name := normaliseVolumeName(v.Name())
logrus.Debugf("Incrementing volume reference: driver %s, name %s", v.DriverName(), name)
vc, exists := s.vols[name]
if !exists {
s.vols[name] = &volumeCounter{v, 1}
return
}
vc.count++
}
// Decrement decrements the usage count of the passed in volume by 1
func (s *VolumeStore) Decrement(v volume.Volume) {
s.mu.Lock()
defer s.mu.Unlock()
name := normaliseVolumeName(v.Name())
logrus.Debugf("Decrementing volume reference: driver %s, name %s", v.DriverName(), name)
vc, exists := s.vols[name]
if !exists {
return
}
if vc.count == 0 {
return
}
vc.count--
}
// volumeToAPIType converts a volume.Volume to the type used by the remote API
func volumeToAPIType(v volume.Volume) *types.Volume {
tv := &types.Volume{
Name: v.Name(),
Driver: v.DriverName(),
Mountpoint: v.Path(),
}
if v, ok := v.(interface {
Labels() map[string]string
}); ok {
tv.Labels = v.Labels()
}
return tv
}
// CopyImagePathContent copies files in destination to the volume.
func (container *Container) CopyImagePathContent(v volume.Volume, destination string) error {
rootfs, err := symlink.FollowSymlinkInScope(filepath.Join(container.BaseFS, destination), container.BaseFS)
if err != nil {
return err
}
if _, err = ioutil.ReadDir(rootfs); err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
path, err := v.Mount()
if err != nil {
return err
}
defer v.Unmount()
return copyExistingContents(rootfs, path)
}
// volumeExists returns if the volume is still present in the driver.
// An error is returned if there was an issue communicating with the driver.
func volumeExists(v volume.Volume) (bool, error) {
vd, err := volumedrivers.GetDriver(v.DriverName())
if err != nil {
return false, errors.Wrapf(err, "error while checking if volume %q exists in driver %q", v.Name(), v.DriverName())
}
exists, err := vd.Get(v.Name())
if err != nil {
err = errors.Cause(err)
if _, ok := err.(net.Error); ok {
return false, errors.Wrapf(err, "error while checking if volume %q exists in driver %q", v.Name(), v.DriverName())
}
// At this point, the error could be anything from the driver, such as "no such volume"
// Let's not check an error here, and instead check if the driver returned a volume
}
if exists == nil {
return false, nil
}
return true, nil
}
// volumeToAPIType converts a volume.Volume to the type used by the remote API
func volumeToAPIType(v volume.Volume) *types.Volume {
return &types.Volume{
Name: v.Name(),
Driver: v.DriverName(),
Mountpoint: v.Path(),
}
}
// CopyImagePathContent copies files in destination to the volume.
func (container *Container) CopyImagePathContent(v volume.Volume, destination string) error {
rootfs, err := symlink.FollowSymlinkInScope(filepath.Join(container.BaseFS, destination), container.BaseFS)
if err != nil {
return err
}
if _, err = ioutil.ReadDir(rootfs); err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
id := stringid.GenerateNonCryptoID()
path, err := v.Mount(id)
if err != nil {
return err
}
defer func() {
if err := v.Unmount(id); err != nil {
logrus.Warnf("error while unmounting volume %s: %v", v.Name(), err)
}
}()
return copyExistingContents(rootfs, path)
}
// Dereference removes the specified reference to the volume
func (s *VolumeStore) Dereference(v volume.Volume, ref string) {
s.locks.Lock(v.Name())
defer s.locks.Unlock(v.Name())
s.globalLock.Lock()
defer s.globalLock.Unlock()
var refs []string
for _, r := range s.refs[v.Name()] {
if r != ref {
refs = append(refs, r)
}
}
s.refs[v.Name()] = refs
}
func (s *VolumeStore) setNamed(v volume.Volume, ref string) {
s.globalLock.Lock()
s.names[v.Name()] = v
if len(ref) > 0 {
s.refs[v.Name()] = append(s.refs[v.Name()], ref)
}
s.globalLock.Unlock()
}
// volumeToAPIType converts a volume.Volume to the type used by the remote API
func volumeToAPIType(v volume.Volume) *types.Volume {
tv := &types.Volume{
Name: v.Name(),
Driver: v.DriverName(),
Size: -1,
RefCount: -1,
}
if v, ok := v.(volume.LabeledVolume); ok {
tv.Labels = v.Labels()
}
if v, ok := v.(volume.ScopedVolume); ok {
tv.Scope = v.Scope()
}
return tv
}
// Remove removes the requested volume. A volume is not removed if the usage count is > 0
func (s *volumeStore) Remove(v volume.Volume) error {
s.mu.Lock()
defer s.mu.Unlock()
name := v.Name()
vc, exists := s.vols[name]
if !exists {
return ErrNoSuchVolume
}
if vc.count != 0 {
return ErrVolumeInUse
}
vd, err := getVolumeDriver(vc.DriverName())
if err != nil {
return err
}
if err := vd.Remove(vc.Volume); err != nil {
return err
}
delete(s.vols, name)
return nil
}
// Refs gets the current list of refs for the given volume
func (s *VolumeStore) Refs(v volume.Volume) []string {
s.locks.Lock(v.Name())
defer s.locks.Unlock(v.Name())
refs := s.getRefs(v.Name())
refsOut := make([]string, len(refs))
copy(refsOut, refs)
return refsOut
}
// Remove removes the requested volume. A volume is not removed if the usage count is > 0
func (s *VolumeStore) Remove(v volume.Volume) error {
s.mu.Lock()
defer s.mu.Unlock()
name := v.Name()
logrus.Debugf("Removing volume reference: driver %s, name %s", v.DriverName(), name)
vc, exists := s.vols[name]
if !exists {
return ErrNoSuchVolume
}
if vc.count > 0 {
return ErrVolumeInUse
}
vd, err := volumedrivers.GetDriver(vc.DriverName())
if err != nil {
return err
}
if err := vd.Remove(vc.Volume); err != nil {
return err
}
delete(s.vols, name)
return nil
}
// Decrement decrements the usage count of the passed in volume by 1
func (s *volumeStore) Decrement(v volume.Volume) {
s.mu.Lock()
defer s.mu.Unlock()
logrus.Debugf("Decrementing volume reference: driver %s, name %s", v.DriverName(), v.Name())
vc, exists := s.vols[v.Name()]
if !exists {
return
}
vc.count--
return
}