Struct SliceReader 

pub struct SliceReader<'a> { /* private fields */ }

Borrowed slice of a parent BlockRead.

read_at(0, …) reads start of the parent. Reads past length return Error::ShortRead.

Implementations

impl<'a> SliceReader<'a>

pub fn new(parent: &'a (dyn BlockRead + 'a), start: u64, length: u64) -> Self

pub fn start(&self) -> u64

Byte offset of this slice on the parent device.

pub fn length(&self) -> u64

Length of this slice in bytes (== size_bytes()).

Trait Implementations

impl<'a> BlockDevice for SliceReader<'a>

Slices are read-only by default — even where the parent is writable, slicing is almost always paired with a read-only inspection or dispatch workflow.

fn write_at(&self, _offset: u64, _buf: &[u8]) -> Result<()>

Write exactly buf.len() bytes at offset. Default: returns Error::ReadOnly.

fn flush(&self) -> Result<()>

Flush pending writes to stable storage. No-op by default.

fn is_writable(&self) -> bool

Whether write_at is likely to succeed. Mount paths use this to decide whether to attempt journal replay or stay strict-read-only.

impl<'a> BlockRead for SliceReader<'a>

fn read_at(&self, offset: u64, buf: &mut [u8]) -> Result<()>

Read exactly buf.len() bytes starting at offset (bytes from the start of the device).

fn size_bytes(&self) -> u64

Total device size in bytes. Used for bounds checks.