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Re: [Xen-devel] block-nbd script and example config

  • To: Anthony Liguori <aliguori@xxxxxxxxxx>
  • From: Arnd Schmitter <arnd_xen@xxxxxxxx>
  • Date: Thu, 20 Oct 2005 10:15:05 +0200
  • Cc: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, Xen development list <xen-devel@xxxxxxxxxxxxxxxxxxx>, Kurt Garloff <garloff@xxxxxxx>, Nicholas Lee <emptysands@xxxxxxxxx>
  • Delivery-date: Thu, 20 Oct 2005 08:12:24 +0000
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Anthony Liguori wrote:
Nicholas Lee wrote:

The only thing to think about is how do handle file devices with spaces
in the filename.  This is going to be common I think.

Since it's a python variable can't you just run a validator on config
import and throw an exception if the devive block doesn't exist. Noting that device paths including special characters need to be
enclosured in "...".

ie. export=phy:"/dev/vgname/bob your uncle; mate! device", ...
Double quotes are actually valid characters in a filename although rarely used.

A more bold way of approaching this would be to adopt a more qemu like syntax of:

hda1="/dev/vgname/bob you uncle; mate1"

We could use stat to figure out whether something was a file or a device and use the appropriate script (file or phy). For everything else, we could use explicit urls such as:


I like the syntax a lot but I'm not sure that marking a device read-only works nicely anymore. We could have a single readonly attribute like:

readonly=['hda1', 'hda2']
For readonly i would suggest a kind of following syntax:




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