From: Sam Li <faithilike...@gmail.com>
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 <faithilike...@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
---
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.
+
+ .. 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.
+
+ .. option:: zone.conventional_zones
+
+ The number of conventional zones of the zoned device.
+
+ .. 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.
+
+ .. 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.
+
+ .. 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.
+
.. program:: image-formats
.. option:: qed
--
2.34.1
