Enum L2Mapping

pub(super) enum L2Mapping {
    DataFile {
        host_cluster: HostCluster,
        copied: bool,
    },
    Backing {
        backing_offset: u64,
    },
    Zero {
        host_cluster: Option<HostCluster>,
        copied: bool,
    },
    Compressed {
        host_offset: HostOffset,
        length: u64,
    },
}

High-level representation of an L2 entry.

Variants

DataFile

Data is in the data file.

Fields

host_cluster: HostCluster

Cluster in the data file.

copied: bool

Whether the cluster has a refcount of exactly 1.

Backing

Data is in the backing file.

Fields

backing_offset: u64

Guest cluster index.

Zero

Data is zero.

Fields

host_cluster: Option<HostCluster>

Preallocated cluster in the data file, if any.

copied: bool

Whether the preallocated cluster has a refcount of exactly 1.

Compressed

Data is compressed.

Fields

host_offset: HostOffset

Offset in the data file.

length: u64

Upper limit on the number of bytes that comprise the compressed data.

Implementations

impl L2Mapping

pub fn is_consecutive(&self, preceding: &L2Mapping, cluster_bits: u32) -> bool

Check whether two mappings are consecutive.

Given the preceding mapping, check whether self is consecutive to it, i.e. is the same kind of mapping, and the offsets are consecutive.

Trait Implementations

impl Clone for L2Mapping

fn clone(&self) -> L2Mapping

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for L2Mapping

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

Formats the value using the given formatter.