Method CreateCustomVolumeFromCopy

internal/server/storage/backend.go:4964–5216

CreateCustomVolumeFromCopy creates a custom volume from an existing custom volume. It copies the snapshots from the source volume by default, but can be disabled if requested.

(projectName string, srcProjectName string, volName string, desc string, config map[string]string, srcPoolName, srcVolName string, snapshots bool, op *operations.Operation)

// CreateCustomVolumeFromCopy creates a custom volume from an existing custom volume.
// It copies the snapshots from the source volume by default, but can be disabled if requested.
func (b *backend) CreateCustomVolumeFromCopy(projectName string, srcProjectName string, volName string, desc string, config map[string]string, srcPoolName, srcVolName string, snapshots bool, op *operations.Operation) error {
	l := b.logger.AddContext(logger.Ctx{"project": projectName, "srcProjectName": srcProjectName, "volName": volName, "desc": desc, "config": config, "srcPoolName": srcPoolName, "srcVolName": srcVolName, "snapshots": snapshots})
	l.Debug("CreateCustomVolumeFromCopy started")
	defer l.Debug("CreateCustomVolumeFromCopy finished")

	err := b.isStatusReady()
	if err != nil {
		return err
	}

	if srcProjectName == "" {
		srcProjectName = projectName
	}

	// Setup the source pool backend instance.
	var srcPool Pool
	if b.name == srcPoolName {
		srcPool = b // Source and target are in the same pool so share pool var.
	} else {
		// Source is in a different pool to target, so load the pool.
		srcPool, err = LoadByName(b.state, srcPoolName)
		if err != nil {
			return err
		}
	}

	// Check source volume exists and is custom type, and get its config.
	srcConfig, err := srcPool.GenerateCustomVolumeBackupConfig(srcProjectName, srcVolName, snapshots, op)
	if err != nil {
		return fmt.Errorf("Failed generating volume copy config: %w", err)
	}

	// Use the source volume's config if not supplied.
	if config == nil {
		config = srcConfig.Volume.Config
	}

	// Use the source volume's description if not supplied.
	if desc == "" {
		desc = srcConfig.Volume.Description
	}

	contentDBType, err := VolumeContentTypeNameToContentType(srcConfig.Volume.ContentType)
	if err != nil {
		return err
	}

	// Get the source volume's content type.
	contentType, err := VolumeDBContentTypeToContentType(contentDBType)
	if err != nil {
		return err
	}

	storagePoolSupported := slices.Contains(b.Driver().Info().VolumeTypes, drivers.VolumeTypeCustom)

	if !storagePoolSupported {
		return errors.New("Storage pool does not support custom volume type")
	}