Re: [Xen-devel] blktap2: need more than 3 values to unpack

[Dutch Meyer <dmeyer@xxxxxxxxx>]

The tap:aio:/pathto/file.img syntax that you're using in your config was 
changed before blktap2 was introduced. tap:tapdisk:aio:/pathto/file.img is 
apparently the correct syntax now, though the README didn't get updated to 
reflect this.  Our blktap2 documentation is no better - I'll try to 
remedy that this week.

If you're still seeing this error:
   "Error: 'file' object has no attribute 'find'"

Then I might be able to help, but I'm not sure how to reproduce it.  If 
you send a log file and config for this latter error I'll take a look. 
Yang seems to be reporting the same thing in another thread.
--Dutch

On Mon, 1 Jun 2009, Dan Magenheimer wrote:

> Hmmm... trying blktap2 for the first time, using 19682.
> I had thought that the syntax hadn't changed, but I am
> getting what appears to be a parsing error on my vbd line.
>
> "ValueError: need more than 3 values to unpack"
>
> Thinking maybe that "w!" was the culprit, I changed
> it to "w" with no change in result.
>
> Looking at the python code that generated the error,
> I tried to figure out the syntax by experimentation
> but without luck.  I tried:
>
> tap:tapdisk:aio:/pathto/file.img
>
> but got "Error: 'file' object has no attribute 'find'"
>
> To see if I could use the old blktap, I tried
>
> tap:tapdisk:ioemu:/pathto/file.img
>
> but got the dreaded "Error: Device 768 (tap) could not be
> connected. Hotplug scripts not working"
>
> Am I missing something in the syntax for blktap2?
> Is there a how-to or readme I didn't find?  Or
> is there some required dependency I don't know about
> that is missing?
>
> I thought maybe I had a bad install, so rebuilt and
> reinstalled with the same result.
>
> xend.log and config file attached.
>
> Thanks,
> Dan
>
> P.S. I am trying blktap2 because both blktap and
> file-backed fail.  Blktap sometimes reads garbage
> from the file and
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