Enum UnmapBehavior 

pub enum UnmapBehavior {
    Unspecified,
    Ignored,
    Zeroes,
}

The behavior of the DiskIo::unmap operation.

This describes what happens to the content of unmapped sectors. Frontends use this to report the correct behavior to the guest (e.g., SCSI LBPRZ bit or NVMe DLFEAT field).

Variants

Unspecified

Unmap may or may not change the content, and not necessarily to zero. The guest cannot assume anything about the content of unmapped sectors.

Ignored

Unmaps are guaranteed to be ignored — the content is unchanged. The disk reports that unmap is not supported.

Zeroes

Unmap will deterministically zero the content. The guest can rely on reading back zeroes from unmapped sectors.

Trait Implementations

impl Clone for UnmapBehavior

fn clone(&self) -> UnmapBehavior

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnmapBehavior

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

Formats the value using the given formatter.

impl Inspect for UnmapBehavior

fn inspect(&self, req: Request<'_>)

Inspects the object.

impl PartialEq for UnmapBehavior

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

impl Eq for UnmapBehavior

impl StructuralPartialEq for UnmapBehavior