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package libpod
import (
"os"
"path/filepath"
"github.com/containers/podman/v3/libpod/define"
"github.com/pkg/errors"
)
// Creates a new volume
func newVolume(runtime *Runtime) *Volume {
volume := new(Volume)
volume.config = new(VolumeConfig)
volume.state = new(VolumeState)
volume.runtime = runtime
volume.config.Labels = make(map[string]string)
volume.config.Options = make(map[string]string)
volume.state.NeedsCopyUp = true
volume.state.NeedsChown = true
return volume
}
// teardownStorage deletes the volume from volumePath
func (v *Volume) teardownStorage() error {
if v.UsesVolumeDriver() {
return nil
}
// TODO: Should this be converted to use v.config.MountPoint?
return os.RemoveAll(filepath.Join(v.runtime.config.Engine.VolumePath, v.Name()))
}
// Volumes with options set, or a filesystem type, or a device to mount need to
// be mounted and unmounted.
func (v *Volume) needsMount() bool {
// Non-local driver always needs mount
if v.UsesVolumeDriver() {
return true
}
// Commit 28138dafcc added the UID and GID options to this map
// However we should only mount when options other than uid and gid are set.
// see https://github.com/containers/podman/issues/10620
index := 0
if _, ok := v.config.Options["UID"]; ok {
index++
}
if _, ok := v.config.Options["GID"]; ok {
index++
}
// when uid or gid is set there is also the "o" option
// set so we have to ignore this one as well
if index > 0 {
index++
}
// Local driver with options other than uid,gid needs mount
return len(v.config.Options) > index
}
// update() updates the volume state from the DB.
func (v *Volume) update() error {
if err := v.runtime.state.UpdateVolume(v); err != nil {
return err
}
if !v.valid {
return define.ErrVolumeRemoved
}
return nil
}
// save() saves the volume state to the DB
func (v *Volume) save() error {
return v.runtime.state.SaveVolume(v)
}
// Refresh volume state after a restart.
func (v *Volume) refresh() error {
lock, err := v.runtime.lockManager.AllocateAndRetrieveLock(v.config.LockID)
if err != nil {
return errors.Wrapf(err, "error acquiring lock %d for volume %s", v.config.LockID, v.Name())
}
v.lock = lock
return nil
}
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