Enum ExtentMutation 

pub enum ExtentMutation {
    WriteRoot {
        bytes: Vec<u8>,
    },
    WriteTreeBlock {
        block: u64,
        bytes: Vec<u8>,
    },
    AllocLeafBlock {
        bytes: Vec<u8>,
    },
    FreeLeafBlock {
        block: u64,
    },
    FreePhysicalRun {
        start: u64,
        len: u32,
    },
}

A primitive change the extent-write path wants to make to the tree. The caller (E10 or a test) converts this into real I/O under a transaction.

Variants

WriteRoot

Overwrite the inline root (60 bytes of i_block) with these bytes.

Fields

bytes: Vec<u8>

WriteTreeBlock

Rewrite an existing external extent node. The filesystem patches its checksum and journals this together with the inode and bitmap updates.

Fields

block: u64

bytes: Vec<u8>

AllocLeafBlock

Allocate a fresh leaf block and write these bytes to it. Returned for future multi-level operations; not produced by the current plan fns.

Fields

bytes: Vec<u8>

FreeLeafBlock

Free a previously-used leaf/index block back to the bitmap.

Fields

block: u64

FreePhysicalRun

Free a contiguous physical-block run back to the bitmap (from a dropped leaf extent). start is the first physical block, len is the count.

Fields

start: u64

len: u32

Trait Implementations

impl Clone for ExtentMutation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtentMutation

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

Formats the value using the given formatter.

impl Eq for ExtentMutation

impl PartialEq for ExtentMutation

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ExtentMutation