From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?S=C3=A9bastien_Chaumat?= <sebastien.chaumat@qspin.be>
Subject: Please reconsider bug 26
Date: Wed, 11 May 2016 16:51:41 +0200
Message-ID: <CAHdho9Pw7jAnQ6Q7RqFMms9dBV9mBfMEHGsG9T5yK9GnJ9nFBQ@mail.gmail.com>
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Hello,

  http://bugs.xenproject.org/xen/bug/26 is nearly 3yrs old.

(bassically one can attach the same vbd rw to 2 domUs with xl without
warning )

 Combined with a distribution behavior  like

https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1572446

 (a trailing domu.cfg~ backup file will be blindly used to launch twice a
domU config with only the name changed)

 leads to real fun  (namely filesystem corruption)

 Recalling early discussion here about xen philosophy, isolation  accross
domUs should be the default. Clearly xl does not provide vbd isolation by
default.

 Would you mind considering implementing vbd usage detection in xl ?

Thanks,
Sebastien

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<div dir=3D"ltr">Hello,<br><br>=C2=A0 <a href=3D"http://bugs.xenproject.org=
/xen/bug/26">http://bugs.xenproject.org/xen/bug/26</a> is nearly 3yrs old.<=
br><br>(bassically one can attach the same vbd rw to 2 domUs with xl withou=
t warning )<br><br>=C2=A0Combined with a distribution behavior =C2=A0like<b=
r><br><a href=3D"https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1572446=
">https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1572446</a><br><br>=C2=
=A0(a trailing domu.cfg~ backup file will be blindly used to launch twice a=
 domU config with only the name changed)<br><br>=C2=A0leads to real fun =C2=
=A0(namely filesystem corruption)<br><br>=C2=A0Recalling early discussion h=
ere about xen philosophy, isolation =C2=A0accross domUs should be the defau=
lt. Clearly xl does not provide vbd isolation by default.<br><br>=C2=A0Woul=
d you mind considering implementing vbd usage detection in xl ?<br><br>Than=
ks,<br>Sebastien<br><div><div dir=3D"ltr"><div><br></div></div></div>
</div>

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