Re: [RFC v4 0/9] Add support for zoned device

[Sam Li]

Stefan Hajnoczi <stefanha@gmail.com> 于2022年7月27日周三 23:06写道：
>
> This patch series introduces the concept of zoned storage to the QEMU
> block layer. Documentation is needed so that users and developers know
> how to use and maintain this feature.
>
> As a minimum, let's document how to pass through zoned block devices on Linux:
>
> diff --git a/docs/system/qemu-block-drivers.rst.inc
> b/docs/system/qemu-block-drivers.rst.inc
> index dfe5d2293d..f6ba05710a 100644
> --- a/docs/system/qemu-block-drivers.rst.inc
> +++ b/docs/system/qemu-block-drivers.rst.inc
> @@ -430,6 +430,12 @@ Hard disks
>    you may corrupt your host data (use the ``-snapshot`` command
>    line option or modify the device permissions accordingly).
>
> +Zoned block devices
> +  Zoned block devices can be passed through to the guest if the emulated
> +  storage controller supports zoned storage. Use ``--blockdev
> +  zoned_host_device,node-name=drive0,filename=/dev/nullb0`` to pass through
> +  ``/dev/nullb0`` as ``drive0``.
> +
>  Windows
>  ^^^^^^^
>
> For developers there should be an explanation of the zoned storage
> APIs and how BlockDrivers declare support. It should also mention the
> status of pass through (implemented in the zoned_host_device driver)
> vs zone emulation (not implemented in the QEMU block layer) so
> developers understand the block layer's zoned storage capabilities.
> You can add a docs/devel/zoned-storage.rst file to document this or
> let me know if you want me to write it.

I will write the document and address the issues in the reviews, which
should be in the next revision.
Thanks for reviewing!

Have a good day!
Sam