Struct qcow2::Qcow2

pub struct Qcow2<I> where
    I: ReadAt,  { /* fields omitted */ }

A qcow2 image.

Examples

extern crate positioned_io;
extern crate qcow2;

use positioned_io::ReadAt;
use qcow2::Qcow2;


// Open a file.
let file = try!(File::open("image.qcow2"));
let qcow = try!(Qcow2::open(file));

// Read some data.
let reader = try!(qcow.reader());
let mut buf = vec![0, 4096];
try!(reader.read_exact_at(5 * 1024 * 1024, &mut buf));

Methods

impl<I> Qcow2<I> where
    I: ReadAt, 

fn reader<'a>(&'a self) -> Result<Reader<I>>

Get a Reader for the main virtual disk.

This allows data to be read from inside the virtual disk image.

impl<I> Qcow2<I> where
    I: ReadAt, 

fn open(io: I) -> Result<Self>

Open a source of data as a qcow2 image.

Usually the data source io will be a file.

fn cluster_size(&self) -> u64

Get the size of each block of this qcow2 image.

fn guest_size(&self) -> u64

Get the size of the virtual image.

This is likely to differ from the size of the qcow2 file itself, since the file can grow.

Trait Implementations

impl<I> Debug for Qcow2<I> where
    I: ReadAt, 

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

Formats the value using the given formatter.