Release of libvirt-6.7.0

The 6.7.0 release of both libvirt and libvirt-python is tagged and signed tarballs and source RPMs are available at https://libvirt.org/sources/ https://libvirt.org/sources/python/ Thanks everybody who helped with this release by sending patches, reviewing, testing, or providing any other feedback. Your work is greatly appreciated. * Packaging changes * Libvirt switch to Meson build system Libvirt abandoned autotools and switched to Meson build system. * New features * qemu: Add support for initiator IQN configuration for iSCSI hostdevs Similarly to iSCSI ``<disk>`` users can use an ``<initiator>`` element inside ``<hostdev>`` with the same format to configure the ``IQN`` value used by the qemu initiator when connecting to an iSCSI target. * xen: Add support for device model command-line passthrough Xen supports passing arbitrary arguments to the QEMU device model using the ``device_model_args`` setting in xl.cfg(5). The libvirt xen driver now supports this using ``<xen:commandline/>`` XML extensions. * shmem: Add support for shmem-{plain, doorbell} ``role`` option The ``role`` attribute controls how the domain behaves on migration. With ``role=master``, the guest will copy the shared memory on migration to the destination host. With ``role=peer``, the migration is disabled. * bhyve: Sound device support This feature allows to configure guest sound device using the ``<sound>`` element, and map it to the host sound device using the ``<audio>`` element. * Improvements * Allow sparse streams for block devices Sparse streams (e.g. ``virsh vol-download --sparse`` or ``virsh vol-upload --sparse``) now handle if one of the stream ends is a block device. * Remove NVDIMM auto-alignment for pSeries Guests This feature was introduced in libvirt v6.2.0 as part of the overall NVDIMM support for pSeries guests. The idea was to relieve the user from knowing ppc64 alignment details, but the end result is that we ended up with inconsistencies between domain XML and actual NVDIMM size the guest is using. To promote consistency between domain XML and the guest, unaligned NVDIMM sizes for pSeries guests will now be forbidden and no size auto-alignment will be made. Instead, libvirt will suggest an aligned round up size for the user. * Bug fixes * virdevmapper: Deal with kernels without DM support In the previous release libvirt dropped libdevmapper in favor of its own implementation. However, it failed to deal correctly with kernels that either don't have device mapper enabled or where the dm-mod module is not loaded yet. This is now fixed. * resctrl: Use exclusive lock for /sys/fs/resctrl When two or more domains were attempted to start at once, due to a bug in implementation, resctrl was not locked properly and thus threads did not mutually exclude with each other resulting in not setting requested limitations. * mdev: Fix daemon crash when reattaching mdevs on assignment conflict If there's a list of mdevs to be assigned to a domain, but one of them (NOT the first) is already assigned to a different domain then libvirtd would crash. This is now fixed. * Fix logic in setting COW flag on btrfs When COW is not explicitly requested to be disabled or enabled, then libvirt should do nothing on non-BTRFS file systems. * Avoid crash due to race in glib event loop code Libvirt switched to glib event loop in 6.1.0 but it was also tickling a bug in glib code leading to the daemon crash. Libvirt way of calling glib was changed so the daemon crashes no more. * virdevmapper: Handle kernel without device-mapper support In the previous release, Libvirt dropped libdevmapper in favor of its own implementation. But the implementation did not handle kernels without device-mapper support. This is now fixed. * remove autogenerated macvtap names from migration XML Autogenerated macvtap device names were being left in the migration XML, which could result in libvirt erroneously deleting the macvtap device of a different guest in the aftermath of failing to restart the guest on the destination host. Removing the autogenerated names avoids this. Enjoy. Jirka