Struct FileDevice 

pub struct FileDevice { /* private fields */ }

Implementations

impl FileDevice

pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>

Open read-only.

pub fn open_rw<P: AsRef<Path>>(path: P) -> Result<Self>

Open read-write. Errors if the path is not writable.

pub fn open_best_effort<P: AsRef<Path>>(path: P) -> Result<Self>

Open read-write if possible, fall back to read-only otherwise.

Trait Implementations

impl BlockDevice for FileDevice

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 BlockRead for FileDevice

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.