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-rw-r--r--src/boot/efi/disk.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/boot/efi/disk.c b/src/boot/efi/disk.c
new file mode 100644
index 0000000..49ee81b
--- /dev/null
+++ b/src/boot/efi/disk.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "util.h"
+
+EFI_STATUS disk_get_part_uuid(EFI_HANDLE *handle, CHAR16 uuid[static 37]) {
+ EFI_DEVICE_PATH *device_path;
+
+ /* export the device path this image is started from */
+ device_path = DevicePathFromHandle(handle);
+ if (device_path) {
+ _cleanup_freepool_ EFI_DEVICE_PATH *paths = NULL;
+ EFI_DEVICE_PATH *path;
+
+ paths = UnpackDevicePath(device_path);
+ for (path = paths; !IsDevicePathEnd(path); path = NextDevicePathNode(path)) {
+ HARDDRIVE_DEVICE_PATH *drive;
+
+ if (DevicePathType(path) != MEDIA_DEVICE_PATH)
+ continue;
+ if (DevicePathSubType(path) != MEDIA_HARDDRIVE_DP)
+ continue;
+ drive = (HARDDRIVE_DEVICE_PATH *)path;
+ if (drive->SignatureType != SIGNATURE_TYPE_GUID)
+ continue;
+
+ GuidToString(uuid, (EFI_GUID *)&drive->Signature);
+ return EFI_SUCCESS;
+ }
+ }
+
+ return EFI_NOT_FOUND;
+}