Struct ExtentHeader 

pub struct ExtentHeader {
    pub magic: u16,
    pub entries: u16,
    pub max: u16,
    pub depth: u16,
    pub generation: u32,
}

Header of an ext4 extent tree node (root, internal, or leaf).

Fields

magic: u16

Magic number (EXTENT_HEADER_MAGIC = 0xF30A).

entries: u16

Number of valid entries following this header.

max: u16

Maximum number of entries that could follow this header.

depth: u16

Depth of this node in the extent tree (0 = leaf).

generation: u32

Generation of the tree (used by Lustre, not standard ext4).

Implementations

impl ExtentHeader

pub const SIZE: usize = 12

pub fn read_from(buf: &[u8]) -> Self

pub fn write_to(&self, buf: &mut [u8])

Trait Implementations

impl Clone for ExtentHeader

fn clone(&self) -> ExtentHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtentHeader

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

Formats the value using the given formatter.

impl Default for ExtentHeader

fn default() -> ExtentHeader

Returns the “default value” for a type.

impl Copy for ExtentHeader