Enum ExtentType

#[repr(u32)]
pub enum ExtentType {
    Allocated = 0,
    Hole = 1,
    Zero = 2,
    HoleZero = 3,
}

Used by Server::extents to report extents to the client

Variants

Allocated = 0

A normal, allocated data extent

Hole = 1

An unallocated extent (hole) which does not read back as zeroes. Note this should only be used in specialized circumstances such as when writing a plugin for (or to emulate) certain SCSI drives which do not guarantee that trimmed blocks read back as zeroes.

Zero = 2

An allocated extent which is known to contain only zeroes.

HoleZero = 3

An unallocated extent, a.k.a. a “hole”, which reads back as zeroes. This is the normal type of hole applicable to most disks.

Trait Implementations

impl Clone for ExtentType

fn clone(&self) -> ExtentType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExtentType

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

Formats the value using the given formatter.

impl PartialEq for ExtentType

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

impl Eq for ExtentType

impl StructuralPartialEq for ExtentType