709c9fd56b
Add the partition type GUID for every partition to the installed handle, this is required per the UEFI specification. "The firmware must add the PartitionTypeGuid to the handle of every active GPT partition using EFI_BOOT_SERVICES.InstallProtocolInterface()." Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jeff Brasen <jbrasen.qdt@qualcommdatacenter.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
282 lines
9.1 KiB
C
282 lines
9.1 KiB
C
/** @file
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Decode an El Torito formatted CD-ROM
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Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc.
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Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Partition.h"
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/**
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Install child handles if the Handle supports El Torito format.
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@param[in] This Calling context.
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@param[in] Handle Parent Handle.
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@param[in] DiskIo Parent DiskIo interface.
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@param[in] DiskIo2 Parent DiskIo2 interface.
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@param[in] BlockIo Parent BlockIo interface.
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@param[in] BlockIo2 Parent BlockIo2 interface.
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@param[in] DevicePath Parent Device Path
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@retval EFI_SUCCESS Child handle(s) was added.
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@retval EFI_MEDIA_CHANGED Media changed Detected.
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@retval other no child handle was added.
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**/
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EFI_STATUS
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PartitionInstallElToritoChildHandles (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE Handle,
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IN EFI_DISK_IO_PROTOCOL *DiskIo,
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IN EFI_DISK_IO2_PROTOCOL *DiskIo2,
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IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
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IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2,
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
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)
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{
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EFI_STATUS Status;
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UINT64 VolDescriptorOffset;
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UINT32 Lba2KB;
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EFI_BLOCK_IO_MEDIA *Media;
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CDROM_VOLUME_DESCRIPTOR *VolDescriptor;
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ELTORITO_CATALOG *Catalog;
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UINTN Check;
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UINTN Index;
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UINTN BootEntry;
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UINTN MaxIndex;
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UINT16 *CheckBuffer;
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CDROM_DEVICE_PATH CdDev;
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UINT32 SubBlockSize;
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UINT32 SectorCount;
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EFI_STATUS Found;
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UINT32 VolSpaceSize;
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EFI_PARTITION_INFO_PROTOCOL PartitionInfo;
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Found = EFI_NOT_FOUND;
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Media = BlockIo->Media;
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VolSpaceSize = 0;
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//
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// CD_ROM has the fixed block size as 2048 bytes (SIZE_2KB)
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//
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// If the ISO image has been copied onto a different storage media
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// then the block size might be different (eg: USB).
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// Ensure 2048 (SIZE_2KB) is a multiple of block size
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if (((SIZE_2KB % Media->BlockSize) != 0) || (Media->BlockSize > SIZE_2KB)) {
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return EFI_NOT_FOUND;
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}
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VolDescriptor = AllocatePool ((UINTN)SIZE_2KB);
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if (VolDescriptor == NULL) {
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return EFI_NOT_FOUND;
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}
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Catalog = (ELTORITO_CATALOG *) VolDescriptor;
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//
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// Loop: handle one volume descriptor per time
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// The ISO-9660 volume descriptor starts at 32k on the media
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//
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for (VolDescriptorOffset = SIZE_32KB;
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VolDescriptorOffset <= MultU64x32 (Media->LastBlock, Media->BlockSize);
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VolDescriptorOffset += SIZE_2KB) {
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Status = DiskIo->ReadDisk (
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DiskIo,
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Media->MediaId,
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VolDescriptorOffset,
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SIZE_2KB,
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VolDescriptor
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);
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if (EFI_ERROR (Status)) {
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Found = Status;
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break;
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}
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//
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// Check for valid volume descriptor signature
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//
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if (VolDescriptor->Unknown.Type == CDVOL_TYPE_END ||
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CompareMem (VolDescriptor->Unknown.Id, CDVOL_ID, sizeof (VolDescriptor->Unknown.Id)) != 0
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) {
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//
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// end of Volume descriptor list
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//
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break;
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}
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//
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// Read the Volume Space Size from Primary Volume Descriptor 81-88 byte,
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// the 32-bit numerical values is stored in Both-byte orders
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//
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if (VolDescriptor->PrimaryVolume.Type == CDVOL_TYPE_CODED) {
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VolSpaceSize = VolDescriptor->PrimaryVolume.VolSpaceSize[0];
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}
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//
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// Is it an El Torito volume descriptor?
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//
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if (CompareMem (VolDescriptor->BootRecordVolume.SystemId, CDVOL_ELTORITO_ID, sizeof (CDVOL_ELTORITO_ID) - 1) != 0) {
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continue;
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}
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//
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// Read in the boot El Torito boot catalog
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// The LBA unit used by El Torito boot catalog is 2KB unit
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//
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Lba2KB = UNPACK_INT32 (VolDescriptor->BootRecordVolume.EltCatalog);
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// Ensure the LBA (in 2KB unit) fits into our media
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if (Lba2KB * (SIZE_2KB / Media->BlockSize) > Media->LastBlock) {
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continue;
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}
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Status = DiskIo->ReadDisk (
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DiskIo,
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Media->MediaId,
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MultU64x32 (Lba2KB, SIZE_2KB),
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SIZE_2KB,
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Catalog
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "EltCheckDevice: error reading catalog %r\n", Status));
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continue;
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}
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//
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// We don't care too much about the Catalog header's contents, but we do want
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// to make sure it looks like a Catalog header
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//
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if (Catalog->Catalog.Indicator != ELTORITO_ID_CATALOG || Catalog->Catalog.Id55AA != 0xAA55) {
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DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header IDs not correct\n"));
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continue;
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}
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Check = 0;
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CheckBuffer = (UINT16 *) Catalog;
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for (Index = 0; Index < sizeof (ELTORITO_CATALOG) / sizeof (UINT16); Index += 1) {
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Check += CheckBuffer[Index];
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}
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if ((Check & 0xFFFF) != 0) {
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DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header checksum failed\n"));
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continue;
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}
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MaxIndex = Media->BlockSize / sizeof (ELTORITO_CATALOG);
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for (Index = 1, BootEntry = 1; Index < MaxIndex; Index += 1) {
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//
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// Next entry
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//
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Catalog += 1;
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//
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// Check this entry
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//
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if (Catalog->Boot.Indicator != ELTORITO_ID_SECTION_BOOTABLE || Catalog->Boot.Lba == 0) {
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continue;
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}
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SubBlockSize = 512;
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SectorCount = Catalog->Boot.SectorCount;
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switch (Catalog->Boot.MediaType) {
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case ELTORITO_NO_EMULATION:
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SubBlockSize = Media->BlockSize;
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break;
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case ELTORITO_HARD_DISK:
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break;
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case ELTORITO_12_DISKETTE:
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SectorCount = 0x50 * 0x02 * 0x0F;
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break;
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case ELTORITO_14_DISKETTE:
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SectorCount = 0x50 * 0x02 * 0x12;
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break;
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case ELTORITO_28_DISKETTE:
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SectorCount = 0x50 * 0x02 * 0x24;
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break;
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default:
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DEBUG ((EFI_D_INIT, "EltCheckDevice: unsupported El Torito boot media type %x\n", Catalog->Boot.MediaType));
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SectorCount = 0;
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SubBlockSize = Media->BlockSize;
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break;
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}
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//
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// Create child device handle
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//
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CdDev.Header.Type = MEDIA_DEVICE_PATH;
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CdDev.Header.SubType = MEDIA_CDROM_DP;
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SetDevicePathNodeLength (&CdDev.Header, sizeof (CdDev));
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if (Index == 1) {
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//
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// This is the initial/default entry
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//
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BootEntry = 0;
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}
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CdDev.BootEntry = (UINT32) BootEntry;
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BootEntry++;
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CdDev.PartitionStart = Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize);
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if (SectorCount < 2) {
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//
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// When the SectorCount < 2, set the Partition as the whole CD.
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//
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if (VolSpaceSize * (SIZE_2KB / Media->BlockSize) > (Media->LastBlock + 1)) {
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CdDev.PartitionSize = (UINT32)(Media->LastBlock - Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + 1);
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} else {
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CdDev.PartitionSize = (UINT32)(VolSpaceSize - Catalog->Boot.Lba) * (SIZE_2KB / Media->BlockSize);
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}
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} else {
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CdDev.PartitionSize = DivU64x32 (
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MultU64x32 (
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SectorCount * (SIZE_2KB / Media->BlockSize),
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SubBlockSize
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) + Media->BlockSize - 1,
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Media->BlockSize
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);
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}
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ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));
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PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;
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PartitionInfo.Type = PARTITION_TYPE_OTHER;
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Status = PartitionInstallChildHandle (
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This,
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Handle,
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DiskIo,
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DiskIo2,
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BlockIo,
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BlockIo2,
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DevicePath,
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(EFI_DEVICE_PATH_PROTOCOL *) &CdDev,
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&PartitionInfo,
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Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize),
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Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + CdDev.PartitionSize - 1,
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SubBlockSize,
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NULL
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);
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if (!EFI_ERROR (Status)) {
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Found = EFI_SUCCESS;
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}
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}
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}
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FreePool (VolDescriptor);
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return Found;
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}
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