On 04/04/2014 02:51 AM, Daniel P. Berrange wrote:
On Thu, Apr 03, 2014 at 11:39:29AM -0400, Tomoki Sekiyama wrote:
These will freeze and thaw filesystems within guest. The APIs take @disks and @ndisks parameters to specify disks to be frozen or thawed. The parameters can be NULL and 0, then the all mounted filesystes are frozen or thawed. If some disks are frozen multiple times, they are not thawed until requested to be thawed as many times as freeze request. @flags parameter, which are currently not used, is for future extensions.
+int virDomainFSThaw(virDomainPtr dom, + const char **disks, + unsigned int ndisks, + unsigned int flags);
Are all guests OS required to support unfreeze on a per disk basis. I vaguely recall someone mentioning that some OS can do all-or-none only.
If that's the case, the command can issue an error if disks is non-NULL but the guest agent required an all-or-none operation. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org