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Re: [Qemu-devel] [PATCH] qcow2: fix autoclear image header update

From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH] qcow2: fix autoclear image header update
Date: Thu, 14 Jun 2012 13:06:10 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

Am 14.06.2012 12:42, schrieb Stefan Hajnoczi:
> The autoclear feature bits can be used for qcow2 file format features
> that are safe to "drop" by old programs that do not understand the
> feature.  Upon opening the image file unknown autoclear feature bits are
> cleared and the image file header is rewritten, but this was happening
> too early in the code when critical header fields were not yet loaded.
> Process autoclear feature bits after all necessary header information
> has been loaded.
> Signed-off-by: Stefan Hajnoczi <address@hidden>


You don't have a qemu-iotests case to offer for the feature bit
handling, by any chance?


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