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Re: [Xen-devel] xl create should refuse to share block devices RW betwee

To: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] xl create should refuse to share block devices RW between domains
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 27 Jul 2010 08:18:50 -0700
Cc: Xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Daniel Stodden <Daniel.Stodden@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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References: <4C4E2A06.9070604@xxxxxxxx> <1280218738.5872.8148.camel@xxxxxxxxxxxxxxxxxxxxxx> <alpine.DEB.2.00.1007271115430.19809@kaball-desktop> <1280228106.5872.8479.camel@xxxxxxxxxxxxxxxxxxxxxx>
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 On 07/27/2010 03:55 AM, Ian Campbell wrote:
I also think that tap_ctl_create is the right place to do these checks,
not a script called by udev after the device has been created.
Agreed. tapdisk should be taking out a flock() or something similar on
any vhd files it is going to write to and should fail if it can't lock
the file.

I'm not sure that would work for physical device/lvm backing.

    J

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