Struct FxBlob 

pub struct FxBlob { /* private fields */ }

Represents an immutable blob stored on Fxfs with associated an merkle tree.

Implementations

impl FxBlob

pub fn new( handle: DataObjectHandle<FxVolume>, merkle_root: Hash, merkle_verifier: MerkleVerifier, compression_info: Option<CompressionInfo>, uncompressed_size: u64, ) -> Result<Arc<Self>, Error>

pub fn overwrite_me( self: &Arc<Self>, handle: DataObjectHandle<FxVolume>, merkle_verifier: MerkleVerifier, compression_info: Option<CompressionInfo>, ) -> Arc<Self>

Returns the new blob.

pub fn root(&self) -> Hash

Trait Implementations

impl Drop for FxBlob

fn drop(&mut self)

Executes the destructor for this type.

impl FxNode for FxBlob

fn object_id(&self) -> u64

fn parent(&self) -> Option<Arc<FxDirectory>>

fn set_parent(&self, _parent: Arc<FxDirectory>)

fn open_count_add_one(&self)

fn open_count_sub_one(self: Arc<Self>)

Atomically check if this brought the count to zero while the node is marked for purge. If so, this must queue the node for tombstone the node.

fn object_descriptor(&self) -> ObjectDescriptor

fn terminate(&self)

Called when the filesystem is shutting down. Implementations should break any strong reference cycles that would prevent the node from being dropped.

fn mark_to_be_purged(&self)

Marks the object to be purged. Queues the node for tombstone if open count is zero.

impl PagerBacked for FxBlob

fn pager(&self) -> &Pager

The pager backing this VMO.

fn pager_packet_receiver_registration( &self, ) -> &PagerPacketReceiverRegistration<Self>

The receiver registration returned from Pager::create_vmo.

fn vmo(&self) -> &Vmo

The pager backed VMO that this object is handling packets for. The VMO must be created with Pager::create_vmo.

fn page_in(self: Arc<Self>, range: PageInRange<Self>)

Called by the pager when a ZX_PAGER_VMO_READ packet is received for the VMO. The implementation must respond by calling either PageInRange::supply_pages or PageInRange::report_failure.

fn mark_dirty(self: Arc<Self>, _range: MarkDirtyRange<Self>)

Called by the pager when a ZX_PAGER_VMO_DIRTY packet is received for the VMO. The implementation must respond by calling either MarkDirtyRange::dirty_pages or MarkDirtyRange::report_failure.

fn on_zero_children(self: Arc<Self>)

Called by the pager to indicate there are no more VMO children.

fn byte_size(&self) -> u64

Total bytes readable. Anything reads over this will be zero padded in the VMO.

async fn aligned_read(&self, range: Range<u64>) -> Result<Buffer<'_>, Error>

Reads one or more blocks into a buffer and returns it. This method is called by default_page_in and aligned_byte_range will always be aligned to the read_ahead_size past to default_page_in unless that would extend beyond self.byte_size(), in which case, aligned_byte_range will end at self.byte_size()’s next page multiple. The returned buffer must be at least as large as the requested range. Only the requested range will be supplied to the pager.

impl ToWeakNode for FxBlob

fn to_weak_node(self: Arc<Self>) -> WeakNode