Struct RefBlockCacheBackend

pub(super) struct RefBlockCacheBackend<S: Storage> {
    file: Arc<S>,
    header: Arc<Header>,
}

I/O back-end for the refblock cache.

Fields

file: Arc<S>

Qcow2 metadata file.

header: Arc<Header>

Qcow2 header.

Implementations

impl<S: Storage> RefBlockCacheBackend<S>

pub fn new(file: Arc<S>, header: Arc<Header>) -> Self

Create a new RefBlockCacheBackend.

file is the qcow2 metadata (image) file.

Trait Implementations

impl<S: Storage> AsyncLruCacheBackend for RefBlockCacheBackend<S>

type Key = HostCluster

Key type.

type Value = RefBlock

Value (object) type.

async fn load(&self, rb_cluster: HostCluster) -> Result<RefBlock>

Load the given object.

async fn flush( &self, rb_cluster: HostCluster, refblock: Arc<RefBlock>, ) -> Result<()>

Flush the given object.

unsafe fn evict(&self, _rb_cluster: HostCluster, refblock: RefBlock)

Drop the given object without flushing.