Re: How to hot plugin a new vhost-user-blk-pci device to running VM?
On Fri, Jun 04, 2021 at 19:22:31 +0800, 梁朝军 wrote:
Hi Guys:
Who can help me ? What does this issue mean? When I attach a network I hit this issue.
libvirt: QEMU Driver error : internal error: unable to execute QEMU command
'netdev_add': Invalid parameter type for 'vhost', expected: boolean
Your qemu is too-new for libvirt. the 'netdev_add' command was converted
to a strict description by QMP schema and libvirt wasn't ready for that.
commit b6738ffc9f8be5a2a61236cd9bef7fd317982f01
Author: Peter Krempa <pkrempa(a)redhat.com>
Date: Thu May 14 22:50:59 2020 +0200
qemu: command: Generate -netdev command line via JSON->cmdline conversion
The 'netdev_add' command was recently formally described in qemu via the
QMP schema. This means that it also requires the arguments to be
properly formatted. Our current approach is to generate the command line
and then use qemuMonitorJSONKeywordStringToJSON to get the JSON
properties for the monitor. This will not work if we need to pass some
fields as numbers or booleans.
In this step we re-do internals of qemuBuildHostNetStr to format a JSON
object which is converted back via virQEMUBuildNetdevCommandlineFromJSON
to the equivalent command line. This will later allow fixing of the
monitor code to use the JSON object directly rather than rely on the
conversion.
v6.3.0-139-gb6738ffc9f
Thus you need at least libvirt 6.4.0 with that qemu.