Struct Key 

pub struct Key {
    pub objectid: u64,
    pub item_type: u32,
    pub offset: u64,
}

A compound B-tree key: (objectid, item_type, offset).

Items in a btrfs tree are ordered by this 136-bit compound value: (objectid << 72) | (item_type << 64) | offset. The three fields are not independent ranges — they form a single ordered tuple.

Fields

objectid: u64

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

item_type: u32

Item type: a BTRFS_*_KEY constant from crate::raw.

offset: u64

Type-specific offset (e.g. byte offset for extents, parent ID for backrefs).

Implementations

impl Key

pub const MIN: Self

The smallest possible key.

pub const MAX: Self

The largest possible key.

Trait Implementations

impl Clone for Key

fn clone(&self) -> Key

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Key

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

Formats the value using the given formatter.

impl PartialEq for Key

fn eq(&self, other: &Key) -> 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 Key

impl Eq for Key

impl StructuralPartialEq for Key