Struct DiskKey 

pub struct DiskKey {
    pub objectid: u64,
    pub key_type: KeyType,
    pub offset: u64,
}

A parsed btrfs disk key (objectid, type, offset).

Every item and key pointer in a B-tree is addressed by this three-part key. Keys are sorted lexicographically: first by objectid, then type, then offset.

Fields

objectid: u64

Object this key belongs to (e.g. inode number, tree ID, device ID).

key_type: KeyType

Discriminates what kind of data this key addresses.

offset: u64

Type-specific offset (e.g. byte offset for extents, directory index).

Implementations

impl DiskKey

pub fn parse(buf: &[u8], off: usize) -> Self

Parse a disk key from buf at byte offset off. The on-disk layout is: objectid (le64), type (u8), offset (le64) = 17 bytes.

Trait Implementations

impl Clone for DiskKey

fn clone(&self) -> DiskKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiskKey

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

Formats the value using the given formatter.

impl PartialEq for DiskKey

fn eq(&self, other: &DiskKey) -> 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 Copy for DiskKey

impl Eq for DiskKey

impl StructuralPartialEq for DiskKey