Struct FileBlockDevice 

pub struct FileBlockDevice { /* private fields */ }

A block device backed by a file on the host filesystem.

This is useful for working with disk images or loopback devices.

Implementations

impl FileBlockDevice

pub fn create<P: AsRef<Path>>(path: P, size: u64) -> Result<Self>

Create a new disk image file with the specified size.

Arguments

• path - Path to create the file at
• size - Total size in bytes
• block_size - Block size (default 512)

Returns

A new FileBlockDevice wrapping the created file

pub fn create_with_block_size<P: AsRef<Path>>( path: P, size: u64, block_size: u32, ) -> Result<Self>

Create a new disk image file with custom block size.

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

Open an existing disk image file.

Arguments

• path - Path to the file

Returns

A FileBlockDevice wrapping the file

pub fn open_with_block_size<P: AsRef<Path>>( path: P, block_size: u32, ) -> Result<Self>

Open an existing disk image file with custom block size.

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

Open an existing disk image file in read-only mode.

pub fn open_read_only_with_block_size<P: AsRef<Path>>( path: P, block_size: u32, ) -> Result<Self>

Open an existing disk image file in read-only mode with custom block size.

Trait Implementations

impl BlockDevice for FileBlockDevice

fn read_blocks(&self, block_id: u64, buf: &mut [u8]) -> Result<u32>

Read blocks from the device.

fn write_blocks(&mut self, block_id: u64, buf: &[u8]) -> Result<u32>

Write blocks to the device.

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

Flush any pending writes to the device.

fn block_size(&self) -> u32

Get the physical block size in bytes.

fn block_count(&self) -> u64

Get the total number of blocks.

fn open(&mut self) -> Result<()>

Open the device (called before first I/O operation).

fn close(&mut self) -> Result<()>

Close the device (called when unmounting).