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Aiden Park
51b69d447b
The FindPartitions() allocates memory for PART_BLOCK_DEVICE instance. This allocated memory needs to be de-allocated if no more necessary to avoid memory leak. TBD: Current partition info needs to be cleared before going to next boot option. Signed-off-by: Aiden Park <aiden.park@intel.com>
112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/** @file
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Routines supporting partition discovery and
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logical device reading
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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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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#ifndef _PARTITION_LIB_H_
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#define _PARTITION_LIB_H_
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#include <BlockDevice.h>
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#define PART_INFO_SIGNATURE SIGNATURE_32 ('P', 'A', 'R', 'T')
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#define PART_MAX_BLOCK_SIZE 8192
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#define PART_MAX_BLOCK_DEVICE 64
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#define GPT_MAX_NUM_PARTITIONS 128
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enum {
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EnumPartTypeUnknown = 0,
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EnumPartTypeMbr,
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EnumPartTypeGpt,
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EnumPartTypeMax
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};
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//
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// The block device
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//
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typedef struct {
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UINT64 StartBlock;
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UINT64 LastBlock;
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} LOGICAL_BLOCK_DEVICE;
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typedef struct {
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UINT32 Signature;
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BOOLEAN PartitionChecked;
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UINT32 PartitionType;
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UINT32 HarewareDevice;
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UINT32 BlockDeviceCount;
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UINT64 BlockData[PART_MAX_BLOCK_SIZE / 8];
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LOGICAL_BLOCK_DEVICE BlockDevice[PART_MAX_BLOCK_DEVICE];
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DEVICE_BLOCK_INFO BlockInfo;
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} PART_BLOCK_DEVICE;
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/**
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Get logical partition information
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This function will fill in logical partition information.
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@param[in] SwPart Software partition index.
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@param[in] PartHandle Partition handle.
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@param[in,out] LogicBlkDev Pointer of the logic block device LOGICAL_BLOCK_DEVICE
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structure to receive block start and end information.
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@retval EFI_SUCCESS The logic partition information was filled successfully.
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@retval EFI_INVALID_PARAMETER Invalid parameters.
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**/
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EFI_STATUS
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EFIAPI
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GetLogicalPartitionInfo (
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IN UINT32 SwPart,
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IN EFI_HANDLE PartHandle,
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IN OUT LOGICAL_BLOCK_DEVICE *LogicBlkDev
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);
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/**
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Find partitions from OS boot medium
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This function will check hardware partition for MBR, GPT or NONE parition.
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@param[in] HwDevice The hardware device index.
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@param[out] PartHandle The pointer to return parition handle
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@retval EFI_SUCCESS The partition was found successfully.
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@retval EFI_NOT_FOUND No partition was found.
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@retval EFI_DEVICE_ERROR Error occured for device access.
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@retval EFI_INVALID_PARAMETER Invalid parameters.
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@retval EFI_OUT_OF_RESOURCES Insufficant memory resource pool.
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**/
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EFI_STATUS
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EFIAPI
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FindPartitions (
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IN UINT32 HwDevice,
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OUT EFI_HANDLE *PartHandle
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);
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/**
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Clean-up allocated memory/etc. used for partitions
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@param[in] PartHandle The partition handle to clean-up
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@retval none
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**/
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VOID
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EFIAPI
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ClosePartitions (
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IN EFI_HANDLE PartHandle
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);
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#endif
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