On 29.03.2016 17:51, Kevin Wolf wrote: > Am 24.03.2016 um 20:07 hat Max Reitz geschrieben: >> As I responded to: >> - http://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg04464.html >> - http://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg05680.html >> >> I think a general solution for querying the block node tree would be >> nice (I don't think we actually have one). The single patch in this >> series implements such a command. >> >> However, this is an RFC because I'm not sure whether we really want this >> and thus I didn't want to write the necessary tests for something we may >> be going to discard anyway. > > I think we do want to have a way to query the tree structure in QMP. The > part that I'm so sure about is whether we want a recursive command or > one that just covers the children of a single node. If we want the > latter, just adding a children field (which maps role names to node > names) to query-block might be enough.
Sounds fine in principle to me, but I'd like to add that I think we may
want to have a new command for querying a specific BDS. You don't get
much choice which nodes you query with query-block, and
query-named-block-nodes seems a bit bloated to me by now...
About the "mapping role names to node names" though; I suppose you mean
like { "file": "file-node", "backing": "other-qcow2-node" }. I'd have
loved to do that, but I couldn't imagine a way to represent that in the
QAPI schema.
Max
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