Enum SuperBlockInstance

pub enum SuperBlockInstance {
    A,
    B,
}

An enum representing one of our super-block instances.

This provides hard-coded constants related to the location and properties of the super-blocks that are required to bootstrap the filesystem.

Variants

A

B

Implementations

impl SuperBlockInstance

pub fn next(&self) -> SuperBlockInstance

Returns the next SuperBlockInstance for use in round-robining writes across super-blocks.

pub fn object_id(&self) -> u64

pub fn first_extent(&self) -> Range<u64>

Returns the byte range where the first extent of the SuperBlockInstance is stored. (Note that a SuperBlockInstance may still have multiple extents.)

pub fn legacy_first_extent(&self) -> Range<u64>

We used to allocate 512kB to superblocks but this was almost always more than needed.

Trait Implementations

impl Clone for SuperBlockInstance

fn clone(&self) -> SuperBlockInstance

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SuperBlockInstance

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

Formats the value using the given formatter.

impl Copy for SuperBlockInstance