Release of libvirt-6.8.0

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The 6.8.0 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.

* New features

  * xen: Add ``writeFiltering`` attribute for PCI devices

    By default Xen filters guest writes to the PCI configuration space of a
    PCI hostdev, which may cause problems for some devices. The ``writeFiltering``
    attribute of the device's ``<source>`` element can be used to disable the
    filtering and allow all guest writes to the configuration space.

  * bhyve: Support setting the framebuffer resolution

    Libvirt can now set the framebuffer's "w" and "h" parameters
    using the ``resolution`` element.

  * bhyve: Support VNC password authentication

    Libvirt can now probe whether the bhyve binary supports
    VNC password authentication. In case it does, a VNC password
    can now be passed using the ``passwd`` attribute on
    the ``<graphics>`` element.

  * remote: ``virt-ssh-helper`` replaces ``nc`` for SSH tunnelling

    Libvirt now provides a ``virt-ssh-helper`` binary on the server
    side. The libvirt remote client will use this binary for setting
    up an SSH tunnelled connection to hosts. If not present, it will
    transparently fallback to the traditional ``nc`` tunnel. The new
    binary makes it possible for libvirt to transparently connect
    across hosts even if libvirt is built with a different installation
    prefix on the client vs server. It also enables remote access to
    the unprivileged per-user libvirt daemons (e.g. using a URI such as
    ``qemu+ssh://hostname/session``). The only requirement is that
    ``virt-ssh-helper`` is present in ``$PATH`` of the remote host.

  * esx: implement few APIs

    The ``virConnectListAllNetworks()``, ``virDomainGetHostname()``, and
    ``virDomainInterfaceAddresses()`` (only for
    ``VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT`` source) APIs were implemented
    in the esx driver.

* Improvements

  * qemu: Allow migration over UNIX sockets

    QEMU migration can now be performed completely over UNIX sockets. This is
    useful for containerised scenarios and can be used in both peer2peer and
    direct migrations.

  * dbus: Use GLib implementation instead of libdbus

    Adopting GLib DBus implementation simplifies our code as libdbus provides
    low-level APIs where we had to have a lot of helper functions. With this
    change we also remove dependency on libdbus and possibly fix all the DBus
    related libvirtd crashes seen over the time.

  * Re-introduce NVDIMM auto-alignment for pSeries Guests

    The auto-alignment logic was removed in v6.7.0 in favor of requiring the
    size provided by the user to be already aligned; however, this had the
    unintended consequence of breaking some existing guests. v6.8.0 restores
    the previous behavior with an improvement: it also reflects the auto-aligned
    value in the domain XML.

  * qemu: Preserve qcow2 cluster size after external snapshots

   The new overlay image which is installed on top of the current chain when
   taking an external snapshot now preserves the cluser size of the original
   top image to preserve any performance tuning done on the original image.

* Bug fixes

  * qemu: Various (i)SCSI backed hostdev fixes

   (i)SCSI backed hostdevs now work again with an arbitrarily long
   user-specified device alias and also honor the 'readonly' property after a
   recent rewrite.

* Removed features

  * node_device: Remove HAL node device backend

    HAL is deprecated on all supported OS so there is no need to keep it
    in libvirt. udev backend is used on Linux OSes and devd can be eventually
    implemented as replacement for FreeBSD.

Enjoy.

Jirka




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