d87e5a1de1
The block copy operation is supposed to just move the disk to a new destination. While in certain scenarios it'd make sense to drop the copy-on-read layer, the definition would not correspond to it. This was caused by a fix to the behaviour of the block job after conversion to -blockdev as 'blockdev-mirror' requires the top node of the disk to be selected. This also causes that the 'copy-on-read' filter is ejected but libvirt doesn't unplug it. Instead we need to use the 'replaces' argument of 'blockdev-mirror' which allows to keep filters in place. This will preserve the configuration (which can be optimized later) and also fixes a spurious error logged when trying to unplug the first real file node after copy-on-read which still looks used to qemu. This is also needed for the upcoming feature which adds 'throttle' filter layers as we need to keep those in place too to facilitate the throttling. Resolves: https://issues.redhat.com/browse/RHEL-40077 Fixes: e3137539a9c4af25ab085506d5467ec0847b0ecc Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser
General Public License, version 2.1 (or later). Some parts of the code
that are not part of the C library may have the more restrictive GNU
General Public License, version 2.0 (or later). See the files
COPYING.LESSER and COPYING for full license
terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- users@lists.libvirt.org (for user discussions)
- devel@lists.libvirt.org (for development only)
Further details on contacting the project are available on the website: