Bug 1533105

Summary: provide non-recursive output replacement for query-named-block-nodes
Product: Red Hat Enterprise Linux Advanced Virtualization Reporter: Peter Krempa <pkrempa>
Component: qemu-kvmAssignee: Virtualization Maintenance <virt-maint>
qemu-kvm sub component: Storage QA Contact: leidwang <leidwang>
Status: CLOSED CURRENTRELEASE Docs Contact:
Severity: medium    
Priority: medium CC: chayang, coli, fjin, juzhang, kanderso, kchamart, knoel, mtessun, ngu, rbalakri, virt-maint
Version: ---Keywords: FutureFeature, Triaged
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2021-02-15 07:34:31 UTC Type: Feature Request
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1793036    
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Description Flags
To illustrate, for a disk image chain with depth 4, see the attached output of `query-named-block-nodes` none

Description Peter Krempa 2018-01-10 13:20:38 UTC 
Description of problem:
The output of query-named-block-nodes and query-block provides a lot of redundant data by nesting the backing chain information, but then providing it again for other layers in a linear way. This means that we get N+(N-1)+...(1) data entries instead of N.

For a 200 layer backing chain this returns roughly 9MiB of json.

Version-Release number of selected component (if applicable):


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Additional info:
Comment 1 Kashyap Chamarthy 2018-02-07 14:42:09 UTC 
Created attachment 1392702 [details]
To illustrate, for a disk image chain with depth 4, see the attached output of `query-named-block-nodes`
Comment 3 Ademar Reis 2020-02-05 22:46:17 UTC 
QEMU has been recently split into sub-components and as a one-time operation to avoid breakage of tools, we are setting the QEMU sub-component of this BZ to "General". Please review and change the sub-component if necessary the next time you review this BZ. Thanks
Comment 4 Kashyap Chamarthy 2020-07-24 16:31:50 UTC 
It looks like (I haven't tested it yet) this is fixed by this commit from Peter Krempa:


    https://git.qemu.org/?p=qemu.git;a=commit;h=facda5443f — qapi: Allow getting flat output from 'query-named-block-nodes'
Comment 7 RHEL Program Management 2021-02-15 07:34:31 UTC 
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.
Comment 8 leidwang@redhat.com 2021-02-23 02:00:12 UTC 
According to https://bugzilla.redhat.com/show_bug.cgi?id=1793036#c6,set this bz to CURRENTRELEASE.Thanks.