Struct RootRef 

pub struct RootRef {
    pub dirid: u64,
    pub sequence: u64,
    pub name: Vec<u8>,
}

Reference linking a subvolume to its parent directory.

ROOT_REF keys (parent → child) and ROOT_BACKREF keys (child → parent) use the same on-disk format.

Fields

dirid: u64

Inode number of the directory containing the subvolume entry.

sequence: u64

Directory sequence number (matches the DIR_INDEX offset).

name: Vec<u8>

Name of the subvolume entry in the parent directory.

Implementations

impl RootRef

pub fn parse(data: &[u8]) -> Option<Self>

Parse a root ref (or root backref) from a raw byte buffer.

pub fn serialize(dirid: u64, sequence: u64, name: &[u8]) -> Vec<u8>

Serialize a (dirid, sequence, name) tuple to the on-disk btrfs_root_ref byte representation: 18-byte fixed header (dirid u64 + sequence u64 + name_len u16, all little-endian) followed by the raw name bytes.

Panics

Panics if name.len() does not fit in a u16 (the on-disk name_len field is 16 bits). Practical names are always far below 65535 bytes.

Trait Implementations

impl Clone for RootRef

fn clone(&self) -> RootRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RootRef

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

Formats the value using the given formatter.