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Bug 647516

Summary: [RFE] Automatic discovery of qdev structure/properties
Product: Red Hat Enterprise Linux 7 Reporter: Glauber Costa <gcosta>
Component: qemu-kvmAssignee: Amos Kong <akong>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: low    
Version: 7.0CC: ailan, amit.shah, areis, eblake, juzhang, knoel, lcapitulino, mkenneth, tburke, virt-maint
Target Milestone: rcKeywords: FutureFeature
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-05-26 08:59:39 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 693512    

Description Glauber Costa 2010-10-28 16:02:17 UTC
Qdev should be able to output which devices are available on the system, and which properties each device have. Our only current option is to parse -help output, which is cumbersome.

-device [dev] ? is a suggestion for command line switch, but the mechanics of it are pretty open.

Comment 1 Markus Armbruster 2011-02-18 06:56:20 UTC
There's "-device \?" and "-device DRIVER,\?".  But what we really want here is a solution in QMP.

Comment 2 Markus Armbruster 2011-04-29 09:02:07 UTC
Related bug 647516.

Comment 3 Markus Armbruster 2011-04-29 09:02:55 UTC
Buttefingers... related bug 557939.

Comment 5 Markus Armbruster 2011-06-07 13:22:02 UTC
QMP solution is related to (intertwined with?) upstream QAPI schema work.  Moving to RHEL-7.

Comment 7 Markus Armbruster 2013-09-10 08:25:24 UTC
Some relevant QMP commands have been created since comment#5:

* qom-list-types

* device-list-properties

As far as I can tell, libvirt already uses them.

However, they don't quite cover everything in -device help.  Missing
bits include:

* Bus type: DeviceClass member bus_type

* Alias name: DeviceClass method qdev_class_get_alias()

* Device categories: DeviceClass member categories (new upstream, not
  yet in RHEL-7)

* Description: DeviceClass member desc

* no-user: DeviceClass member no_user

Not sure libvirt really needs all of them.

Comment 11 Amos Kong 2014-05-26 08:59:39 UTC
According to comment #9, close this bug.


qdev structure/properties are defined in qapi-schema.json, the content will be dumped out for management when we finished bz 557939.

*** This bug has been marked as a duplicate of bug 557939 ***