[libvirt] [PATCHv2 2/2] qemu: snapshot: Avoid libvirtd crash when qemu crashes while snapshotting

[Eric Blake]

On 01/20/2014 10:09 AM, Peter Krempa wrote:
> We shouldn't access the domain definition while we are in the monitor
> section as the domain is unlocked. Additionaly after we exit from the

s/Additionaly/Additionally/

> monitor we need to check if the VM is still alive. Not doing so resulted
> into crash if qemu exits while attempting to do a external VM snapshot.

s/into/in a/

> ---
> 
> Notes:
>     Version 1 was reported to break locking of a VM but withoit enough data to reproduce/trace.
>     Version 2:
>     - changed some of the conditions so that proper cleanup paths are taken
>     - fixed returned error value in case the job can't be entered
> 
>  src/qemu/qemu_driver.c | 53 ++++++++++++++++++++++++++++++++++++++------------
>  1 file changed, 41 insertions(+), 12 deletions(-)
> 

Code looks correct, I also ran through a smoke test with your reproducer
1/2 applied, and confirmed that this code is definitely required for the
fix.

ACK with grammar fixes.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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