fix(virtualization-dra): skip usb gateway detach for untracked devices (#2298)

Fix USB device cleanup in virtualization-dra during Unprepare.

The allocation store now checks whether a device is tracked in usbipAllocatedDevicesCount before calling USBGateway detach cleanup. Devices that are not tracked by USBGateway are skipped. For tracked devices, USBGateway detach is executed only when the current device has exactly one active tracked consumer. Devices with multiple consumers only have their consumer count decremented, and invalid zero-count tracked state is skipped with a warning

---------

Signed-off-by: Daniil Antoshin <daniil.antoshin@flant.com>

Author: danilrwx

images/virtualization-dra/internal/usb/store.go

@@ -447,17 +447,21 @@ func (s *AllocationStore) Unprepare(_ context.Context, claimUID types.UID) error
 		for _, device := range allocatedDevices {
 			if usbGatewayEnabled {
 				count, hasCount := s.usbipAllocatedDevicesCount[device]
-				s.log.Info("Device attached by USBGateway", slog.String("device", device), slog.Int("count", count))
+				s.log.Info("Device attached by USBGateway", slog.String("device", device), slog.Int("count", count), slog.Bool("tracked", hasCount))
 				switch {
-				case !hasCount || count <= 1:
+				case !hasCount:
+					s.log.Info("Device is not tracked by USBGateway, skipping detach", slog.String("device", device))
+				case count == 1:
 					s.log.Info("Device has no tracked consumers, attempting detach cleanup", slog.String("device", device), slog.Int("count", count))
 					if err := s.usbGateway.Detach(device); err != nil {
 						return fmt.Errorf("failed to detach device %s: %w", device, err)
 					}
 					delete(s.usbipAllocatedDevicesCount, device)
-				default:
+				case count > 1:
 					s.log.Info("Decrementing device consumer count", slog.String("device", device), slog.Int("newCount", count-1))
 					s.usbipAllocatedDevicesCount[device]--
+				default:
+					s.log.Warn("Device has invalid USBGateway consumer count, skipping detach", slog.String("device", device), slog.Int("count", count))
 				}
 			}