[PATCH 09/11] qdev: Avoid QemuOpts in QMP device_add

[Eric Blake]

On Fri, Sep 24, 2021 at 11:04:25AM +0200, Kevin Wolf wrote:
> Directly call qdev_device_add_from_qdict() for QMP device_add instead of
> first going through QemuOpts and converting back to QDict.
> 
> Note that this changes the behaviour of device_add, though in ways that
> should be considered bug fixes:
> 
> QemuOpts ignores differences between data types, so you could
> successfully pass a string "123" for an integer property, or a string
> "on" for a boolean property (and vice versa).  After this change, the
> correct data type for the property must be used in the JSON input.
> 
> qemu_opts_from_qdict() also silently ignores any options whose value is
> a QDict, QList or QNull.
> 
> To illustrate, the following QMP command was accepted before and is now
> rejected for both reasons:
> 
> { "execute": "device_add",
>   "arguments": { "driver": "scsi-cd",
>                  "drive": { "completely": "invalid" },
>                  "physical_block_size": "4096" } }
> 
> Signed-off-by: Kevin Wolf <kwolf at redhat.com>
> ---
>  softmmu/qdev-monitor.c | 18 +++++++++++-------
>  1 file changed, 11 insertions(+), 7 deletions(-)
>

Reviewed-by: Eric Blake <eblake at redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org