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