X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=EdkModulePkg%2FUniversal%2FDisk%2FPartition%2FDxe%2FMbr.c;fp=EdkModulePkg%2FUniversal%2FDisk%2FPartition%2FDxe%2FMbr.c;h=0000000000000000000000000000000000000000;hp=d71698c82673dcb08641b05b5482c4c4eca4f755;hb=808def96aa4589fba9c2d0ea55837754a3b7a4f7;hpb=9216450d1143056a50a5f916984a2d7faf590488

diff --git a/EdkModulePkg/Universal/Disk/Partition/Dxe/Mbr.c b/EdkModulePkg/Universal/Disk/Partition/Dxe/Mbr.c
deleted file mode 100644
index d71698c826..0000000000
--- a/EdkModulePkg/Universal/Disk/Partition/Dxe/Mbr.c
+++ /dev/null
@@ -1,328 +0,0 @@
-/*++
-
-Copyright (c) 2006 - 2007, Intel Corporation                                                         
-All rights reserved. This program and the accompanying materials                          
-are licensed and made available under the terms and conditions of the BSD License         
-which accompanies this distribution.  The full text of the license may be found at        
-http://opensource.org/licenses/bsd-license.php                                            
-                                                                                          
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
-
-Module Name:
-
-  Mbr.c
-  
-Abstract:
-
-  Decode a hard disk partitioned with the legacy MBR found on most PC's
-
-  MBR - Master Boot Record is in the first sector of a partitioned hard disk.
-        The MBR supports four partitions per disk. The MBR also contains legacy
-        code that is not run on an EFI system. The legacy code reads the 
-        first sector of the active partition into memory and 
-
-  BPB - Boot(?) Parameter Block is in the first sector of a FAT file system. 
-        The BPB contains information about the FAT file system. The BPB is 
-        always on the first sector of a media. The first sector also contains
-        the legacy boot strap code.
-
---*/
-
-#include "Partition.h"
-
-STATIC
-BOOLEAN
-PartitionValidMbr (
-  IN  MASTER_BOOT_RECORD      *Mbr,
-  IN  EFI_LBA                 LastLba
-  )
-/*++
-
-Routine Description:
-  Test to see if the Mbr buffer is a valid MBR
-
-Arguments:       
-  Mbr     - Parent Handle 
-  LastLba - Last Lba address on the device.
-
-Returns:
-  TRUE  - Mbr is a Valid MBR
-  FALSE - Mbr is not a Valid MBR
-
---*/
-{
-  UINT32  StartingLBA;
-  UINT32  EndingLBA;
-  UINT32  NewEndingLBA;
-  INTN    Index1;
-  INTN    Index2;
-  BOOLEAN MbrValid;
-
-  if (Mbr->Signature != MBR_SIGNATURE) {
-    return FALSE;
-  }
-  //
-  // The BPB also has this signature, so it can not be used alone.
-  //
-  MbrValid = FALSE;
-  for (Index1 = 0; Index1 < MAX_MBR_PARTITIONS; Index1++) {
-    if (Mbr->Partition[Index1].OSIndicator == 0x00 || UNPACK_UINT32 (Mbr->Partition[Index1].SizeInLBA) == 0) {
-      continue;
-    }
-
-    MbrValid    = TRUE;
-    StartingLBA = UNPACK_UINT32 (Mbr->Partition[Index1].StartingLBA);
-    EndingLBA   = StartingLBA + UNPACK_UINT32 (Mbr->Partition[Index1].SizeInLBA) - 1;
-    if (EndingLBA > LastLba) {
-      //
-      // Compatibility Errata:
-      //  Some systems try to hide drive space with their INT 13h driver
-      //  This does not hide space from the OS driver. This means the MBR
-      //  that gets created from DOS is smaller than the MBR created from
-      //  a real OS (NT & Win98). This leads to BlockIo->LastBlock being
-      //  wrong on some systems FDISKed by the OS.
-      //
-      // return FALSE since no block devices on a system are implemented
-      // with INT 13h
-      //
-      return FALSE;
-    }
-
-    for (Index2 = Index1 + 1; Index2 < MAX_MBR_PARTITIONS; Index2++) {
-      if (Mbr->Partition[Index2].OSIndicator == 0x00 || UNPACK_UINT32 (Mbr->Partition[Index2].SizeInLBA) == 0) {
-        continue;
-      }
-
-      NewEndingLBA = UNPACK_UINT32 (Mbr->Partition[Index2].StartingLBA) + UNPACK_UINT32 (Mbr->Partition[Index2].SizeInLBA) - 1;
-      if (NewEndingLBA >= StartingLBA && UNPACK_UINT32 (Mbr->Partition[Index2].StartingLBA) <= EndingLBA) {
-        //
-        // This region overlaps with the Index1'th region
-        //
-        return FALSE;
-      }
-    }
-  }
-  //
-  // Non of the regions overlapped so MBR is O.K.
-  //
-  return MbrValid;
-}
-
-EFI_STATUS
-PartitionInstallMbrChildHandles (
-  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
-  IN  EFI_HANDLE                   Handle,
-  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,
-  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,
-  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath
-  )
-/*++
-
-Routine Description:
-  Install child handles if the Handle supports MBR format.
-
-Arguments:       
-  This       - Calling context.
-  Handle     - Parent Handle 
-  DiskIo     - Parent DiskIo interface
-  BlockIo    - Parent BlockIo interface
-  DevicePath - Parent Device Path
-
-Returns:
-  EFI_SUCCESS       - If a child handle was added
-  EFI_MEDIA_CHANGED - Media changed Detected
-	!EFI_SUCCESS      - Not found MBR partition.
-
---*/
-{
-  EFI_STATUS                Status;
-  MASTER_BOOT_RECORD        *Mbr;
-  UINT32                    ExtMbrStartingLba;
-  UINTN                     Index;
-  HARDDRIVE_DEVICE_PATH     HdDev;
-  HARDDRIVE_DEVICE_PATH     ParentHdDev;
-  EFI_STATUS                Found;
-  UINT32                    PartitionNumber;
-  EFI_DEVICE_PATH_PROTOCOL  *DevicePathNode;
-  EFI_DEVICE_PATH_PROTOCOL  *LastDevicePathNode;
-
-  Mbr             = NULL;
-  Found           = EFI_NOT_FOUND;
-
-  Mbr             = AllocatePool (BlockIo->Media->BlockSize);
-  if (Mbr == NULL) {
-    goto Done;
-  }
-
-  Status = BlockIo->ReadBlocks (
-                      BlockIo,
-                      BlockIo->Media->MediaId,
-                      0,
-                      BlockIo->Media->BlockSize,
-                      Mbr
-                      );
-  if (EFI_ERROR (Status)) {
-    Found = Status;
-    goto Done;
-  }
-  if (!PartitionValidMbr (Mbr, BlockIo->Media->LastBlock)) {
-    goto Done;
-  }
-  //
-  // We have a valid mbr - add each partition
-  //
-  //
-  // Get starting and ending LBA of the parent block device.
-  //
-  LastDevicePathNode = NULL;
-  ZeroMem (&ParentHdDev, sizeof (ParentHdDev));
-  DevicePathNode = DevicePath;
-  while (!EfiIsDevicePathEnd (DevicePathNode)) {
-    LastDevicePathNode  = DevicePathNode;
-    DevicePathNode      = EfiNextDevicePathNode (DevicePathNode);
-  }
-
-  if (LastDevicePathNode != NULL) {
-    if (DevicePathType (LastDevicePathNode) == MEDIA_DEVICE_PATH &&
-        DevicePathSubType (LastDevicePathNode) == MEDIA_HARDDRIVE_DP
-        ) {
-      CopyMem (&ParentHdDev, LastDevicePathNode, sizeof (ParentHdDev));
-    } else {
-      LastDevicePathNode = NULL;
-    }
-  }
-
-  PartitionNumber = 1;
-
-  ZeroMem (&HdDev, sizeof (HdDev));
-  HdDev.Header.Type     = MEDIA_DEVICE_PATH;
-  HdDev.Header.SubType  = MEDIA_HARDDRIVE_DP;
-  SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));
-  HdDev.MBRType         = MBR_TYPE_PCAT;
-  HdDev.SignatureType   = SIGNATURE_TYPE_MBR;
-
-  if (LastDevicePathNode == NULL) {
-    //
-    // This is a MBR, add each partition
-    //
-    for (Index = 0; Index < MAX_MBR_PARTITIONS; Index++) {
-      if (Mbr->Partition[Index].OSIndicator == 0x00 || UNPACK_UINT32 (Mbr->Partition[Index].SizeInLBA) == 0) {
-        //
-        // Don't use null MBR entries
-        //
-        continue;
-      }
-
-      if (Mbr->Partition[Index].OSIndicator == PMBR_GPT_PARTITION) {
-        //
-        // This is the guard MBR for the GPT. If you ever see a GPT disk with zero partitions you can get here.
-        //  We can not produce an MBR BlockIo for this device as the MBR spans the GPT headers. So formating 
-        //  this BlockIo would corrupt the GPT structures and require a recovery that would corrupt the format
-        //  that corrupted the GPT partition. 
-        //
-        continue;
-      }
-
-      HdDev.PartitionNumber = PartitionNumber ++;
-      HdDev.PartitionStart  = UNPACK_UINT32 (Mbr->Partition[Index].StartingLBA);
-      HdDev.PartitionSize   = UNPACK_UINT32 (Mbr->Partition[Index].SizeInLBA);
-      CopyMem (HdDev.Signature, &(Mbr->UniqueMbrSignature[0]), sizeof (UINT32));
-
-      Status = PartitionInstallChildHandle (
-                This,
-                Handle,
-                DiskIo,
-                BlockIo,
-                DevicePath,
-                (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,
-                HdDev.PartitionStart,
-                HdDev.PartitionStart + HdDev.PartitionSize - 1,
-                MBR_SIZE,
-                (BOOLEAN) (Mbr->Partition[Index].OSIndicator == EFI_PARTITION)
-                );
-
-      if (!EFI_ERROR (Status)) {
-        Found = EFI_SUCCESS;
-      }
-    }
-  } else {
-    //
-    // It's an extended partition. Follow the extended partition
-    // chain to get all the logical drives
-    //
-    ExtMbrStartingLba = 0;
-
-    do {
-
-      Status = BlockIo->ReadBlocks (
-                          BlockIo,
-                          BlockIo->Media->MediaId,
-                          ExtMbrStartingLba,
-                          BlockIo->Media->BlockSize,
-                          Mbr
-                          );
-      if (EFI_ERROR (Status)) {
-        Found = Status;
-        goto Done;
-      }
-
-      if (Mbr->Partition[0].OSIndicator == 0) {
-        break;
-      }
-
-      if ((Mbr->Partition[0].OSIndicator == EXTENDED_DOS_PARTITION) ||
-          (Mbr->Partition[0].OSIndicator == EXTENDED_WINDOWS_PARTITION)) {
-        ExtMbrStartingLba = UNPACK_UINT32 (Mbr->Partition[0].StartingLBA);
-        continue;
-      }
-      HdDev.PartitionNumber = PartitionNumber ++;
-      HdDev.PartitionStart  = UNPACK_UINT32 (Mbr->Partition[0].StartingLBA) + ExtMbrStartingLba + ParentHdDev.PartitionStart;
-      HdDev.PartitionSize   = UNPACK_UINT32 (Mbr->Partition[0].SizeInLBA);
-      if ((HdDev.PartitionStart + HdDev.PartitionSize - 1 >= ParentHdDev.PartitionStart + ParentHdDev.PartitionSize) ||
-          (HdDev.PartitionStart <= ParentHdDev.PartitionStart)) {
-        break;
-      }
-
-      //
-      // The signature in EBR(Extended Boot Record) should always be 0.
-      //
-      *((UINT32 *) &HdDev.Signature[0]) = 0;
-
-      Status = PartitionInstallChildHandle (
-                This,
-                Handle,
-                DiskIo,
-                BlockIo,
-                DevicePath,
-                (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,
-                HdDev.PartitionStart - ParentHdDev.PartitionStart,
-                HdDev.PartitionStart - ParentHdDev.PartitionStart + HdDev.PartitionSize - 1,
-                MBR_SIZE,
-                (BOOLEAN) (Mbr->Partition[0].OSIndicator == EFI_PARTITION)
-                );
-      if (!EFI_ERROR (Status)) {
-        Found = EFI_SUCCESS;
-      }
-
-      if ((Mbr->Partition[1].OSIndicator != EXTENDED_DOS_PARTITION) &&
-          (Mbr->Partition[1].OSIndicator != EXTENDED_WINDOWS_PARTITION)
-          ) {
-        break;
-      }
-
-      ExtMbrStartingLba = UNPACK_UINT32 (Mbr->Partition[1].StartingLBA);
-      //
-      // Don't allow partition to be self referencing
-      //
-      if (ExtMbrStartingLba == 0) {
-        break;
-      }
-    } while (ExtMbrStartingLba  < ParentHdDev.PartitionSize);
-  }
-
-Done:
-  FreePool (Mbr);
-
-  return Found;
-}