66a1949df9
-Detects, decrypts, and mounts an adopted SD card if a secondary block device is defined (usually mmcblk1) -Handles unified storage -Displays the adopted storage in MTP along with internal -Factory Reset - wiped just like a data media device, we retain the keys folder and the storage.xml during a factory reset -Backup / Restore -Disable mass storage when adopted storage is present -Read storage nickname from storage.xml and apply it to display names in the GUI -Read storage.xml and determine what storage location is in use for /sdcard and remap accordingly libgpt_twrp is source code mostly kanged from an efimanager project. It is GPL v2 or higher, so we will opt for GPL v3. Change-Id: Ieda0030bec5155ba8d2b9167dc0016cebbf39d55
183 lines
6.2 KiB
C
183 lines
6.2 KiB
C
/*
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gpt.[ch]
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Copyright (C) 2000-2001 Dell Computer Corporation <Matt_Domsch@dell.com>
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EFI GUID Partition Table handling
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Per Intel EFI Specification v1.02
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http://developer.intel.com/technology/efi/efi.htm
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// For TWRP purposes, we'll be opting for version 3 of the GPL
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#ifndef _GPT_H
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#define _GPT_H
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#include <inttypes.h>
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//#include "efi.h"
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typedef struct {
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uint8_t b[16];
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} efi_guid_t;
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typedef uint16_t efi_char16_t; /* UNICODE character */
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#define EFI_PMBR_OSTYPE_EFI 0xEF
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#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
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#define MSDOS_MBR_SIGNATURE 0xaa55
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#define GPT_BLOCK_SIZE 512
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static const char* TWGptAndroidExpand = "193d1ea4b3ca11e4b07510604b889dcf";
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#define GPT_HEADER_SIGNATURE ((uint64_t)(0x5452415020494645LL))
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#define GPT_HEADER_REVISION_V1_02 0x00010200
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#define GPT_HEADER_REVISION_V1_00 0x00010000
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#define GPT_HEADER_REVISION_V0_99 0x00009900
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#define GPT_PRIMARY_PARTITION_TABLE_LBA 1
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#define PARTITION_SYSTEM_GUID \
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EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
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0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
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#define LEGACY_MBR_PARTITION_GUID \
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EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
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0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
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#define PARTITION_MSFT_RESERVED_GUID \
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EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
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0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
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#define PARTITION_BASIC_DATA_GUID \
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EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
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0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
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#define PARTITION_LINUX_RAID_GUID \
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EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
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0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
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#define PARTITION_LINUX_SWAP_GUID \
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EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
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0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
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#define PARTITION_LINUX_LVM_GUID \
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EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
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0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
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typedef struct _gpt_header {
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uint64_t signature;
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uint32_t revision;
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uint32_t header_size;
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uint32_t header_crc32;
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uint32_t reserved1;
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uint64_t my_lba;
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uint64_t alternate_lba;
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uint64_t first_usable_lba;
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uint64_t last_usable_lba;
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efi_guid_t disk_guid;
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uint64_t partition_entry_lba;
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uint32_t num_partition_entries;
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uint32_t sizeof_partition_entry;
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uint32_t partition_entry_array_crc32;
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uint8_t reserved2[GPT_BLOCK_SIZE - 92];
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} __attribute__ ((packed)) gpt_header;
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typedef struct _gpt_entry_attributes {
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uint64_t required_to_function:1;
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uint64_t reserved:47;
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uint64_t type_guid_specific:16;
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} __attribute__ ((packed)) gpt_entry_attributes;
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typedef struct _gpt_entry {
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efi_guid_t partition_type_guid;
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efi_guid_t unique_partition_guid;
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uint64_t starting_lba;
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uint64_t ending_lba;
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gpt_entry_attributes attributes;
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efi_char16_t partition_name[72 / sizeof(efi_char16_t)];
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} __attribute__ ((packed)) gpt_entry;
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/*
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These values are only defaults. The actual on-disk structures
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may define different sizes, so use those unless creating a new GPT disk!
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*/
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#define GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE 16384
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/*
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Number of actual partition entries should be calculated
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as:
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*/
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#define GPT_DEFAULT_RESERVED_PARTITION_ENTRIES \
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(GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE / \
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sizeof(gpt_entry))
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typedef struct _partition_record {
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uint8_t boot_indicator; /* Not used by EFI firmware. Set to 0x80 to indicate that this
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is the bootable legacy partition. */
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uint8_t start_head; /* Start of partition in CHS address, not used by EFI firmware. */
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uint8_t start_sector; /* Start of partition in CHS address, not used by EFI firmware. */
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uint8_t start_track; /* Start of partition in CHS address, not used by EFI firmware. */
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uint8_t os_type; /* OS type. A value of 0xEF defines an EFI system partition.
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Other values are reserved for legacy operating systems, and
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allocated independently of the EFI specification. */
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uint8_t end_head; /* End of partition in CHS address, not used by EFI firmware. */
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uint8_t end_sector; /* End of partition in CHS address, not used by EFI firmware. */
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uint8_t end_track; /* End of partition in CHS address, not used by EFI firmware. */
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uint32_t starting_lba; /* Starting LBA address of the partition on the disk. Used by
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EFI firmware to define the start of the partition. */
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uint32_t size_in_lba; /* Size of partition in LBA. Used by EFI firmware to determine
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the size of the partition. */
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} __attribute__ ((packed)) partition_record;
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/* Protected Master Boot Record & Legacy MBR share same structure */
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/* Needs to be packed because the u16s force misalignment. */
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typedef struct _legacy_mbr {
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uint8_t bootcode[440];
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uint32_t unique_mbr_signature;
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uint16_t unknown;
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partition_record partition[4];
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uint16_t signature;
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} __attribute__ ((packed)) legacy_mbr;
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#define EFI_GPT_PRIMARY_PARTITION_TABLE_LBA 1
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/* Functions */
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int gpt_disk_get_partition_info (int fd, uint32_t num,
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char *type, char *part);
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#endif
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-indent-level: 4
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* c-brace-imaginary-offset: 0
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* c-brace-offset: -4
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* c-argdecl-indent: 4
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* c-label-offset: -4
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* c-continued-statement-offset: 4
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* c-continued-brace-offset: 0
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* indent-tabs-mode: nil
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* tab-width: 8
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* End:
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*/
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