This patchset tries to implement transient option for qcow2 and raw
format disk.
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 (6):
qemu: Block blockjobs when transient disk option is enabled
qemu: Block disk hotplug when transient disk option is enabled
qemu: Block migration when transient disk option is enabled
qemu: update the validation for transient disk option
qemu: Introduce to handle transient disk
qemu: Add transient disk handler to start and stop the guest
src/qemu/qemu_domain.c | 7 +++
src/qemu/qemu_hotplug.c | 6 +++
src/qemu/qemu_migration.c | 10 ++++
src/qemu/qemu_process.c | 10 ++++
src/qemu/qemu_snapshot.c | 103 +++++++++++++++++++++++++++++++++++---
src/qemu/qemu_snapshot.h | 5 ++
src/qemu/qemu_validate.c | 25 ++++++++-
src/util/virstoragefile.c | 2 +
src/util/virstoragefile.h | 4 ++
9 files changed, 164 insertions(+), 8 deletions(-)
--
2.27.0
