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authorKay Sievers <kay@vrfy.org>2015-07-29 19:26:49 +0200
committerKay Sievers <kay@vrfy.org>2015-07-29 19:36:17 +0200
commit8110e144ff5c3a95a2ac82691ee11528b4e6642a (patch)
treeea32d56666bcad9ecbc0a604c046acb5825b410d /src/boot/efi/disk.c
parent85636547e7fe9a1cf07042842277dd5b86c152fa (diff)
sd-boot: stub - export LoaderDevicePartUUID
Diffstat (limited to 'src/boot/efi/disk.c')
-rw-r--r--src/boot/efi/disk.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/boot/efi/disk.c b/src/boot/efi/disk.c
new file mode 100644
index 0000000000..96063fbc28
--- /dev/null
+++ b/src/boot/efi/disk.c
@@ -0,0 +1,51 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Copyright (C) 2015 Kay Sievers <kay@vrfy.org>
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "util.h"
+
+EFI_STATUS disk_get_part_uuid(EFI_HANDLE *handle, CHAR16 uuid[37]) {
+ EFI_DEVICE_PATH *device_path;
+ EFI_STATUS r = EFI_NOT_FOUND;
+
+ /* export the device path this image is started from */
+ device_path = DevicePathFromHandle(handle);
+ if (device_path) {
+ EFI_DEVICE_PATH *path, *paths;
+
+ 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);
+ r = EFI_SUCCESS;
+ break;
+ }
+ FreePool(paths);
+ }
+
+ return r;
+}