CloverBootloader/rEFIt_UEFI/Platform/APFS.cpp
2022-04-26 00:55:56 +02:00

61 lines
2.1 KiB
C++

/*
* APFS.cpp
*
* Created on: 16 Apr 2020
* Author: jief
*/
#include <Platform.h> // Only use angled for Platform, else, xcode project won't compile
#include <Efi.h>
#include "guid.h"
#include "APFS.h"
/* S. Mitrofanov 08.06.2016
* APFS Container introduced new partitions structure
* Now we have, for example:
* /dev/disk0 (internal, physical):
* #: TYPE NAME SIZE IDENTIFIER
* 0: GUID_partition_scheme *240.1 GB disk0
* 1: EFI EFI 209.7 MB disk0s1
* 2: Apple_APFS Container disk1 239.2 GB disk0s2
* 3: Apple_KernelCoreDump 655.4 MB disk0s3
*
* /dev/disk1 (synthesized):
* #: TYPE NAME SIZE IDENTIFIER
* 0: APFS Container Scheme - +239.2 GB disk1
* Physical Store disk0s2
* 1: APFS Volume Macintosh SSD 170.8 GB disk1s1
* 2: APFS Volume Preboot 17.9 MB disk1s2
* 3: APFS Volume Recovery 521.1 MB disk1s3
* 4: APFS Volume VM 1.1 GB disk1s4
*/
/*
* Function for obtaining unique part id from APFS partition
* IN: DevicePath
* OUT: EFI_GUID
* returns null if it is not APFS part
*/
EFI_GUID APFSPartitionUUIDExtract(
const EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
while (!IsDevicePathEndType(DevicePath) &&
!(DevicePathType(DevicePath) == MEDIA_DEVICE_PATH && DevicePathSubType (DevicePath) == MEDIA_VENDOR_DP)) {
DevicePath = NextDevicePathNode(DevicePath);
}
if (DevicePathType(DevicePath) == MEDIA_DEVICE_PATH && DevicePathSubType (DevicePath) == MEDIA_VENDOR_DP) {
//Check that vendor-assigned EFI_GUID defines APFS Container Partition
if ( ApfsSignatureUUID == *(EFI_GUID *)((UINT8 *)DevicePath+0x04) ) {
return *(EFI_GUID *)((UINT8 *)DevicePath+0x14);
}
}
return nullGuid;
}