[FYI pkrempa is on PTO this week so he won't review this until the next
one]
On a Friday in 2020, Masayoshi Mizuma wrote:
>This patchset tries to implement transient option for qcow2 and raw
>format disk. This uses the snapshot cleanup codes:
>https://www.redhat.com/archives/libvir-list/2020-August/msg00299.html
>
>It gets user available to set <transient/> to the domain xml file like as:
>
> <disk type='file' device='disk'>
> <driver name='qemu' type='qcow2'/>
> <source file='/var/lib/libvirt/images/guest.qcow2'/>
> <target dev='vda' bus='virtio'/>
> <transient/>
> </disk>
>
>Any changes which the Guest does to the disk is dropped when the Guest
>is shutdowned.
>
>There are some limitations for transient disk option so far:
>
>- Supported disk format is qcow2 and raw
>- blockdev capability is required for qemu
>- Following features are blocked with transient disk option
> - blockjobs
> - Migration
> - Disk hotplug
>
>Masayoshi Mizuma (7):
> qemuSnapshotDiskPrepareOne: Get available even if snapdisk is NULL
> qemu: Introduce functions to handle transient disk
> qemu: Add transient disk handler to start and stop the guest
> qemu: Transient option gets avaiable for qcow2 and raw format disk
> qemu: Block blockjobs when transient disk option is enabled
> qemu: Block migration when transient disk option is enabled
> qemu: Block disk hotplug when transient disk option is enabled
>
> src/qemu/qemu_domain.c | 7 ++
> src/qemu/qemu_hotplug.c | 6 ++
> src/qemu/qemu_migration.c | 22 ++++++
> src/qemu/qemu_process.c | 8 +++
> src/qemu/qemu_snapshot.c | 139 +++++++++++++++++++++++++++++++++++++-
> src/qemu/qemu_snapshot.h | 8 +++
> src/qemu/qemu_validate.c | 9 ++-
> src/util/virstoragefile.h | 2 +
> 8 files changed, 196 insertions(+), 5 deletions(-)
>
>--
>2.27.0
>