Enum Compression 

#[non_exhaustive]
pub enum Compression {
    None,
    Zlib,
    Lzo,
    Zstd,
    Other(u8),
}

The compression algorithm of an extent (btrfs_file_extent_item.compression). Unknown values carry their raw byte so an unsupported codec is identifiable (fail-loud: the offending value is shown, never dropped).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

None

0 — no compression; the extent bytes are the file bytes.

Zlib

1 — zlib (a plain zlib stream per extent; flate2).

Lzo

2 — LZO, in btrfs’s per-sector framing (lzo crate + framing).

Zstd

3 — zstd (one zstd frame per extent; ruzstd, pure-Rust).

Other(u8)

Any other BTRFS_COMPRESS_* value, carrying the raw byte.

Implementations

impl Compression

pub fn from_byte(b: u8) -> Self

Classify a raw compression byte.

Trait Implementations

impl Clone for Compression

fn clone(&self) -> Compression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Compression

impl Debug for Compression

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

Formats the value using the given formatter.

impl Eq for Compression

impl PartialEq for Compression

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Compression