On Sun, May 10, 2026 at 07:50:56PM +0200, Sam Li wrote: > Add the specs for the zoned format feature of the qcow2 driver. > The qcow2 file then can emulate real zoned devices, either passed > through by virtio-blk device or NVMe ZNS drive to the guest > given zoned information. > > Signed-off-by: Sam Li <[email protected]> > Reviewed-by: Stefan Hajnoczi <[email protected]> > --- > docs/system/qemu-block-drivers.rst.inc | 42 ++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+) > > diff --git a/docs/system/qemu-block-drivers.rst.inc > b/docs/system/qemu-block-drivers.rst.inc > index 384e95ba76..5066c943d5 100644 > --- a/docs/system/qemu-block-drivers.rst.inc > +++ b/docs/system/qemu-block-drivers.rst.inc > @@ -172,6 +172,48 @@ This section describes each format and the options that > are supported for it. > filename`` to check if the NOCOW flag is set or not (Capital 'C' is > NOCOW flag). > > + .. option:: zone.mode > + If this is set to ``host-managed``, the image is an emulated zoned > + block device. This option is only valid to emulated zoned device files. > + > + .. option:: zone.size > + > + The size of a zone in bytes. The device is divided into zones of this > + size with the exception of the last zone, which may be smaller.
This option is required when zone.mode=host-managed? It would be useful to indicate whether each option listed here is required or has a default value when absent. > + > + .. option:: zone.capacity > + > + The initial capacity value, in bytes, for all zones. The capacity must > + be less than or equal to zone size. If the last zone is smaller, then > + its capacity is capped. > + > + The zone capacity is per zone and may be different between zones in real > + devices. QCow2 sets all zones to the same capacity. This defaults to zone.size? > + > + .. option:: zone.conventional_zones > + > + The number of conventional zones of the zoned device. This defaults to (size + size.size - 1) / zone.size? > + > + .. option:: zone.max_active_zones > + > + The limit of the zones with implicit open, explicit open or closed state. > + > + The max active zones must be less or equal to the number of SWR > + (sequential write required) zones of the device. This defaults to (size + size.size - 1) / zone.size? > + > + .. option:: zone.max_open_zones > + > + The maximal allowed open zones. The max open zones must not be larger > than > + the max active zones. > + > + If the limits of open zones or active zones are equal to the number of > + SWR zones, then it is the same as having no limits. This defaults to max_active_zones? > + .. option:: zone.max_append_bytes > + > + The number of bytes in a zone append request that can be issued to the > + device. It must be 512-byte aligned and less than the zone capacity. Is there a default? > + > .. program:: image-formats > .. option:: qed > > -- > 2.43.0 >
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