partition.h File Reference

#include "kernel.h"

Data Structures
struct	partition_t
	A disk partition on a storage device. More...
struct	partition_table_t
	A disk partition table consisiting of four partition_t. More...
struct	gpt_header_t
struct	gpt_entry_t

Macros
#define	PARTITION_TABLE_OFFSET   0x1BE
#define	PARTITON_GPT_PROTECTIVE   0xEE
#define	GUID_ASCII_LEN   36
#define	GUID_BINARY_LEN   16

Functions
struct partition_t	__attribute__ ((packed)) partition_t
	A disk partition on a storage device. More...
bool	find_partition_of_type (const char *device_name, uint8_t partition_type, char *found_guid, const char *partition_type_guid, uint8_t *partition_id, uint64_t *start, uint64_t *length)
	Given a device name and partition type ID, find the start and length of that partition on the device. Returns false if the partition could not be found. More...
bool	guid_to_binary (const char *guid, void *binary)
bool	binary_to_guid (const void *binary, char *guid)

Variables
uint8_t	bootable
	Partition is bootable. More...
uint8_t	starthead
	Starting head. More...
uint16_t	startcylsect
	Starting cylinder and sector. More...
uint8_t	systemid
	partition type id More...
uint8_t	endhead
	End head. More...
uint16_t	endcylsect
	End cylinder and sector. More...
uint32_t	startlba
	Starting LBA. More...
uint32_t	length
	LBA length. More...
partition_t	p_entry [4]
	Partition entries. More...
char	signature [8]
uint32_t	gpt_revision
uint32_t	header_size
uint32_t	crc_checksum
uint32_t	reserved0
uint64_t	lba_of_this_header
uint64_t	lba_of_alternative_header
uint64_t	first_usable_block
uint64_t	last_usable_block
uint8_t	disk_guid [16]
uint64_t	lba_of_partition_entries
uint32_t	number_partition_entries
uint32_t	size_of_each_entry
uint32_t	crc_32_of_entries
uint8_t	reserved1 []
uint8_t	type_guid [16]
uint8_t	unique_id [16]
uint64_t	start_lba
uint64_t	end_lba
uint64_t	attributes
char	name [72]

Detailed Description

Author

Craig Edwards (craig.nosp@m.edwa.nosp@m.rds@b.nosp@m.rain.nosp@m.box.c.nosp@m.c)

Copyright

Copyright (c) 2012-2023

Macro Definition Documentation

GUID_ASCII_LEN

#define GUID_ASCII_LEN   36

GUID_BINARY_LEN

#define GUID_BINARY_LEN   16

PARTITION_TABLE_OFFSET

#define PARTITION_TABLE_OFFSET   0x1BE

PARTITON_GPT_PROTECTIVE

#define PARTITON_GPT_PROTECTIVE   0xEE

Function Documentation

__attribute__()

struct partition_t __attribute__

(

(packed)

)

A disk partition on a storage device.

A disk partition table consisiting of four partition_t.

binary_to_guid()

bool binary_to_guid	(	const void *	binary,
		char *	guid
	)

find_partition_of_type()

bool find_partition_of_type	(	const char *	device_name,
		uint8_t	partition_type,
		char *	found_guid,
		const char *	partition_type_guid,
		uint8_t *	partition_id,
		uint64_t *	start,
		uint64_t *	length
	)

Given a device name and partition type ID, find the start and length of that partition on the device. Returns false if the partition could not be found.

Parameters

device_name	Device name
partition_type	Partition type ID to find
found_guid	filled with the guid of the found partition, if found on a GPT partition
partition_id	Partition ID of found partition, filled if found, or 0xFF if found on a GPT partition
start	Start of found partition, filled if found
length	Length of found partition, filled if found

Returns

true if partition found, partition_id, start and length will be set

false if partition not found, partition_id, start and length will be unchanged

guid_to_binary()

bool guid_to_binary	(	const char *	guid,
		void *	binary
	)

Variable Documentation

attributes

uint64_t attributes

bootable

uint8_t bootable

Partition is bootable.

crc_32_of_entries

uint32_t crc_32_of_entries

crc_checksum

uint32_t crc_checksum

disk_guid

uint8_t disk_guid[16]

end_lba

uint64_t end_lba

endcylsect

uint16_t endcylsect

End cylinder and sector.

endhead

uint8_t endhead

End head.

first_usable_block

uint64_t first_usable_block

gpt_revision

uint32_t gpt_revision

header_size

uint32_t header_size

last_usable_block

uint64_t last_usable_block

lba_of_alternative_header

uint64_t lba_of_alternative_header

lba_of_partition_entries

uint64_t lba_of_partition_entries

lba_of_this_header

uint64_t lba_of_this_header

length

uint32_t length

LBA length.

name

char name[72]

number_partition_entries

uint32_t number_partition_entries

p_entry

partition_t p_entry[4]

Partition entries.

reserved0

uint32_t reserved0

reserved1

uint8_t reserved1[]

signature

char signature[8]

size_of_each_entry

uint32_t size_of_each_entry

start_lba

uint64_t start_lba

startcylsect

uint16_t startcylsect

Starting cylinder and sector.

starthead

uint8_t starthead

Starting head.

startlba

uint32_t startlba

Starting LBA.

systemid

uint8_t systemid

partition type id

type_guid

uint8_t type_guid[16]

unique_id

uint8_t unique_id[16]