Re: [Qemu-devel] [RFC 1/1] Execute arbitrary QMP commands from command line

[Paolo Bonzini <pbonzini@redhat.com>]

On 30/01/2015 10:38, Dr. David Alan Gilbert wrote:
> * Eric Blake (eblake@redhat.com) wrote:
>> On 01/29/2015 01:21 PM, Dr. David Alan Gilbert wrote:
>>> * Eric Blake (eblake@redhat.com) wrote:
>>>> On 01/29/2015 09:28 AM, Dr. David Alan Gilbert wrote:
>>>>>
>>>>> So what would the .args_type look like in qmp-commands.hx; something like this?
>>>>>
>>>>>   .args-type = "type:s,port:-i,host:-s,command:-s"
>>>>
>>>> No, it would be more like the blockdev-add interface, where one command
>>>> accepts a dictionary object containing a union of valid values, where
>>>> the set of valid values is determined by the discriminator field.
>>>> .args_type = "options:q".
>>>
>>> What causes the parser to generate a 'BlockdevOptions' as opposed to any
>>> standard options type for the parameter of qmp_blockdev_add?
>>
>> Kevin Wolf has the most experience here, as he was the one that figured
>> out how to correlate command line and QMP as part of adding blockdev-add.
> 
> OK, this is getting more complicated than I'd expected; how about a simpler
> suggestion.
> 
> The current suggestion is:
>    Modify  -incoming to take   'pause' as an argument

-S is just the same.

>    Add migrate-incoming command that takes parsed URI
> 
> New suggestion:
>    Modify -incoming to take a pause: prefix (e.g. -incoming pause:tcp:host:port )
>    Add migrate-incoming-start command (takes no arguments).

Another suggestion:

Add incoming argument to the existing URI-based command migrate.

Later on, if ever, add start-migration command that takes structured
options, make HMP and QMP migrate wrappers for start-migration.

Paolo

> It seems simpler.
> 
> Dave
> 
>>
>> -- 
>> Eric Blake   eblake redhat com    +1-919-301-3266
>> Libvirt virtualization library http://libvirt.org
>>
> 
> 
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> 
>