Struct gpt::header::Header

pub struct Header {

    pub signature: String,
    pub revision: u32,
    pub header_size_le: u32,
    pub crc32: u32,
    pub reserved: u32,
    pub current_lba: u64,
    pub backup_lba: u64,
    pub first_usable: u64,
    pub last_usable: u64,
    pub disk_guid: Uuid,
    pub part_start: u64,
    pub num_parts: u32,
    pub part_size: u32,
    pub crc32_parts: u32,
}

Header describing a GPT disk.

Fields

signature: String

GPT header magic signature, hardcoded to “EFI PART”.

revision: u32

00 00 01 00

header_size_le: u32

little endian

crc32: u32

CRC32 of the header with crc32 section zeroed

reserved: u32

must be 0

current_lba: u64

For main header, 1

backup_lba: u64

LBA for backup header

first_usable: u64

First usable LBA for partitions (primary table last LBA + 1)

last_usable: u64

Last usable LBA (secondary partition table first LBA - 1)

disk_guid: Uuid

UUID of the disk

part_start: u64

Starting LBA of partition entries

num_parts: u32

Number of partition entries

part_size: u32

Size of a partition entry, usually 128

crc32_parts: u32

CRC32 of the partition table

Implementations

impl Header

pub fn write_primary<D: Read + Write + Seek>( &self, file: &mut D, lb_size: LogicalBlockSize, ) -> Result<usize>

Write the primary header.

With a CRC32 set to zero this will set the crc32 after writing the header out.

pub fn write_backup<D: Read + Write + Seek>( &self, file: &mut D, lb_size: LogicalBlockSize, ) -> Result<usize>

Write the backup header.

With a CRC32 set to zero this will set the crc32 after writing the header out.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Header

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Header

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Header

fn eq(&self, other: &Header) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Header

impl StructuralPartialEq for Header