On Wed, Aug 09, 2017 at 01:13:02PM +0200, Michal Privoznik wrote:
On 08/09/2017 11:41 AM, Martin Kletzander wrote:On Mon, Aug 07, 2017 at 02:20:06PM +0200, Michal Privoznik wrote:Currently, there's a bug when undefining a domain with NVRAM store. Basically, the unlink() of the NVRAM store file happens during the undefine procedure iff domain is inactive. So, if domain is running and undefine is called the file is left behind. It won't be removed in the domain cleanup process either (qemuProcessStop). One of the solutions is to remove if regardless of the domain state and rely on qemu having the file opened. This still has a downside that if the domain is defined back the NVRAM store file is going to be new, any changes to the current one are lost (just like with any other file that is deleted while a process has it opened). But is it really a downside?It might be. Why don't we disable removing it when the domain is running? We have some precedence for this. The place which already deals with this possibility is tools/virsh-domain.c in the cmdUndefine() where we handle --remove-all-storage. If you look at the help of that command it also says: --nvram remove nvram file, if inactive And that makes sense to me. What doesn't, on the other hand, is that it also says: --keep-nvram keep nvram file, if inactive I don't get the "if inactive" there. But I'm not going to check who pushed that. At least not again =)Okay, I'll write a patch that: a) forbids undefine for active domains, unless b) KEEP_NVRAM flag is specified.
c) or there is no nvram =) Yeah, well, that's caused by the unfortunate design of the way nvram is handled by qemu and qemu driver. Thanks
Michal -- libvir-list mailing list email@example.com https://www.redhat.com/mailman/listinfo/libvir-list
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