Accept device.Identifiers for requesting CDI specs

This change moves from using strings to useing device.Identifiers
as input for requesting CDI specifications for specific
devices.

Signed-off-by: Christopher Desiniotis <cdesiniotis@nvidia.com>
Signed-off-by: Evan Lezar <elezar@nvidia.com>

Author: cdesiniotis

pkg/nvcdi/lib-nvml.go

@@ -80,7 +80,17 @@ func (l *nvmllib) GetCommonEdits() (*cdi.ContainerEdits, error) {
 // GetDeviceSpecsByID returns the CDI device specs for the GPU(s) represented by
 // the provided identifiers, where an identifier is an index or UUID of a valid
 // GPU device.
-func (l *nvmllib) GetDeviceSpecsByID(identifiers ...string) ([]specs.Device, error) {
+// Deprecated: Use GetDeviceSpecsBy instead.
+func (l *nvmllib) GetDeviceSpecsByID(ids ...string) ([]specs.Device, error) {
+	var identifiers []device.Identifier
+	for _, id := range ids {
+		identifiers = append(identifiers, device.Identifier(id))
+	}
+	return l.GetDeviceSpecsBy(identifiers...)
+}
+
+// GetDeviceSpecsBy is not supported for the gdslib specs.
+func (l *nvmllib) GetDeviceSpecsBy(identifiers ...device.Identifier) ([]specs.Device, error) {
 	for _, id := range identifiers {
 		if id == "all" {
 			return l.GetAllDeviceSpecs()
@@ -109,7 +119,7 @@ func (l *nvmllib) GetDeviceSpecsByID(identifiers ...string) ([]specs.Device, err
 			return nil, fmt.Errorf("failed to get CDI device edits for identifier %q: %w", identifiers[i], err)
 		}
 		deviceSpec := specs.Device{
-			Name:           identifiers[i],
+			Name:           string(identifiers[i]),
 			ContainerEdits: *deviceEdits.ContainerEdits,
 		}
 		deviceSpecs = append(deviceSpecs, deviceSpec)
@@ -119,7 +129,7 @@ func (l *nvmllib) GetDeviceSpecsByID(identifiers ...string) ([]specs.Device, err
 }
 
 // TODO: move this to go-nvlib?
-func (l *nvmllib) getNVMLDevicesByID(identifiers ...string) ([]nvml.Device, error) {
+func (l *nvmllib) getNVMLDevicesByID(identifiers ...device.Identifier) ([]nvml.Device, error) {
 	var devices []nvml.Device
 	for _, id := range identifiers {
 		dev, err := l.getNVMLDeviceByID(id)
@@ -131,25 +141,24 @@ func (l *nvmllib) getNVMLDevicesByID(identifiers ...string) ([]nvml.Device, erro
 	return devices, nil
 }
 
-func (l *nvmllib) getNVMLDeviceByID(id string) (nvml.Device, error) {
+func (l *nvmllib) getNVMLDeviceByID(id device.Identifier) (nvml.Device, error) {
 	var err error
-	devID := device.Identifier(id)
 
-	if devID.IsUUID() {
-		return l.nvmllib.DeviceGetHandleByUUID(id)
+	if id.IsUUID() {
+		return l.nvmllib.DeviceGetHandleByUUID(string(id))
 	}
 
-	if devID.IsGpuIndex() {
-		if idx, err := strconv.Atoi(id); err == nil {
+	if id.IsGpuIndex() {
+		if idx, err := strconv.Atoi(string(id)); err == nil {
 			return l.nvmllib.DeviceGetHandleByIndex(idx)
 		}
 		return nil, fmt.Errorf("failed to convert device index to an int: %w", err)
 	}
 
-	if devID.IsMigIndex() {
+	if id.IsMigIndex() {
 		var gpuIdx, migIdx int
 		var parent nvml.Device
-		split := strings.SplitN(id, ":", 2)
+		split := strings.SplitN(string(id), ":", 2)
 		if gpuIdx, err = strconv.Atoi(split[0]); err != nil {
 			return nil, fmt.Errorf("failed to convert device index to an int: %w", err)
 		}