Struct Disk 

pub struct Disk { /* private fields */ }

A disk device with a cursor.

Implementations

impl Disk

pub fn new(dev: AxBlockDevice) -> Self

Create a new disk.

pub fn size(&self) -> u64

Get the size of the disk.

pub fn position(&self) -> u64

Get the position of the cursor.

pub fn set_position(&mut self, pos: u64)

Set the position of the cursor.

pub fn read_one(&mut self, buf: &mut [u8]) -> DevResult<usize>

Read within one block, returns the number of bytes read.

pub fn write_one(&mut self, buf: &[u8]) -> DevResult<usize>

Write within one block, returns the number of bytes written.

Trait Implementations

impl BlockDevice for Disk

fn write( &mut self, buffer: &[u8], block_id: AbsoluteBN, count: u32, ) -> Ext4Result<()>

Writes count blocks from buffer starting at block_id.

fn read( &mut self, buffer: &mut [u8], block_id: AbsoluteBN, count: u32, ) -> Ext4Result<()>

Reads count blocks into buffer starting at block_id.

fn open(&mut self) -> Ext4Result<()>

Opens the underlying device.

fn close(&mut self) -> Ext4Result<()>

Closes the underlying device.

fn total_blocks(&self) -> u64

Returns the total number of device blocks.

fn current_time(&self) -> Ext4Result<Ext4Timestamp>

Returns the current timestamp used for inode metadata updates.

fn block_size(&self) -> u32

Returns the device block size in bytes.

fn flush(&mut self) -> Result<(), Ext4Error>

Flushes device state to stable storage.

fn is_open(&self) -> bool

Returns whether the device is currently open.

fn is_readonly(&self) -> bool

Returns whether the device is read-only.

impl Clone for Disk

fn clone(&self) -> Disk

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl IoBase for Disk

type Error = ()

Type of errors returned by input/output operations.

impl Read for Disk

fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Self::Error>

Read the exact number of bytes required to fill buf.

impl Seek for Disk

fn seek(&mut self, pos: SeekFrom) -> Result<u64, Self::Error>

Seek to an offset, in bytes, in a stream.

impl Write for Disk

fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<(), Self::Error>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Self::Error>

Attempts to write an entire buffer into this writer.