Re: [Nbd] How to find a free NBD device?

[Andreas Klauer <Andreas.Klauer@...1264...>]

On Mon, Mar 03, 2014 at 06:41:47PM +0100, Andreas Klauer wrote:
> Is there something I'm missing?

Sorry, I see this has been discussed earlier on this list:

http://sourceforge.net/p/nbd/mailman/message/31467855/

Another thing I found is a patch for qemu-nbd:
(the patch didn't seem to make it though)

http://lists.gnu.org/archive/html/qemu-devel/2011-11/msg02201.html

That patch discussion also mentions a NBD_SET_LOCK but I could not 
find any other reference to that...

So the method seems to be:

1) check /proc/partitions
2) check /sys/block/nbd*/pid
3) lock your own program and hope no-one is racing you

Is that it?

Regards
Andreas