At present for each namespace there is a block device created for it.
There is no issue if the number of supported namespaces reported from
the NVMe device is only 1.
Since QEMU commit 7f0f1acedf15 ("hw/block/nvme: support multiple namespaces"),
the number of supported namespaces reported has been changed from 1
to 256, but not all of them are active namespaces. The actual active
one depends on the QEMU command line parameters. A common case is
that namespace 1 being active and all other 255 being inactive.
If a namespace is inactive, the namespace identify command returns a
zero filled data structure. We can use field NSZE (namespace size) to
decide whether a block device should be created for it.
Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
478f7fc6a0