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Re: [Qemu-devel] Regression opening read-only cdroms


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] Regression opening read-only cdroms
Date: Tue, 16 Jun 2009 23:11:22 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2

On 06/16/09 18:28, Anthony Liguori wrote:
Jamie Lokier wrote:
What's missing is a "ro" sub-option to "-drive".

It only is useful if we can expose that read-only attribute to the
guest. You can't do that consistently with all block devices so the
result would be that you'll fail write operations causing a guest to crash.

Well, I think all except ide-disk can signal r/o medium to the guest.

This is not friendly to a user who expects that ro would Just Work.

chmod a-w $diskimage
And you'll run into the same issue today.

cheers,
  Gerd




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