Re: [Qemu-devel] help with understanding qcow2 file format

[Vasiliy Tolstov]

2015-09-16 16:46 GMT+03:00 Eric Blake <address@hidden>:

qemu-img map file.qcow2

 

Offset          Length          Mapped to       File

qemu-img: File contains external, encrypted or compressed clusters.

 

is a great way to learn which physical host offsets hold the data at
which guest offsets.

As for coding interactions with qcow2, see the source under block/qcow2.c.

You may also be interested in the visual representation of qcow2 in my
KVM Forum slides, part 1:

http://events.linuxfoundation.org/sites/events/files/slides/2015-qcow2-expanded.pdf

Thanks for slides, they are very useful.

--

Vasiliy Tolstov,
e-mail: address@hidden