Re: [PATCH 15/15] docs: formatdomain: describe dataFileStore element of disk

Signed-off-by: Nikolai Barybin <nikolai.barybin(a)virtuozzo.com&gt; --- docs/formatdomain.rst | 45 ++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 42 insertions(+), 3 deletions(-)

diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 18b60fe260..54a9e01034 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -2708,24 +2708,38 @@ paravirtualized driver is specified via the ``disk`` element. </backingStore> <target dev='vdd' bus='virtio'/> </disk> + <disk type='file' device='disk'> + <driver name='qemu' type='qcow2' queues='4' queue_size='256' /> + <source file='/var/lib/libvirt/images/domain2.qcow'/> + <backingStore type='file'> + <format type='qcow2'/> + <source file='/var/lib/libvirt/images/base-with-data-file.qcow'/> + </backingStore> + <dataFileStore type='block'> + <format type='raw'/> + <source dev='/dev/mapper/base2'/> + <dataFileStore/> + </backingStore> + <target dev='vde' bus='virtio'/> + </disk> <disk type='nvme' device='disk'> <driver name='qemu' type='raw'/> <source type='pci' managed='yes' namespace='1'> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> - <target dev='vde' bus='virtio'/> + <target dev='vdf' bus='virtio'/> </disk> <disk type='vhostuser' device='disk'> <driver name='qemu' type='raw'/> <source type='unix' path='/tmp/vhost-blk.sock'> <reconnect enabled='yes' timeout='10'/> </source> - <target dev='vdf' bus='virtio'/> + <target dev='vdg' bus='virtio'/> </disk> <disk type='vhostvdpa' device='disk'> <driver name='qemu' type='raw'/> <source dev='/dev/vhost-vdpa-0' /> - <target dev='vdg' bus='virtio'/> + <target dev='vdh' bus='virtio'/> </disk> </devices> ... @@ -3116,6 +3130,27 @@ paravirtualized driver is specified via the ``disk`` element. accessible or its disk chain is broken, with startupPolicy 'opt> guest will drop this disk. This feature doesn't support migration currently. +``dataFileStore`` + This element describes external data file store, which is represented by ``qcow2`` + incompatible features bit and allows to store guest clusters are the external + data file. For such images, clusters in the external data file are not refcounted. + The following attribute is supported in ``dataFileStore``: + + ``type`` + The ``type`` attribute represents the type of disk used by the data file store, + see disk type attribute above for more details and possible values. + + Moreover, ``dataFileStore`` supports the following sub-elements: + + ``format`` + The ``format`` element contains ``type`` attribute which specifies the + internal format of the data file store. Only ``raw`` value is supported. + + ``source`` + This element has the same structure as the ``source`` element in ``disk``. + It specifies which file, device, or network location contains the data of + the described data file store. +