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RE: Using param structure in VIF interface
- To: "paul@xxxxxxx" <paul@xxxxxxx>, Owen Smith <owen.smith@xxxxxxxxxx>
- From: Martin Harvey <martin.harvey@xxxxxxxxxx>
- Date: Tue, 14 Jun 2022 08:55:50 +0000
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- Thread-topic: Using param structure in VIF interface
-----Original Message-----
From: Durrant, Paul <xadimgnik@xxxxxxxxx>
Sent: 13 June 2022 17:34
> Just to let you know that I am working on this...
Okay! <Relived!>
> It's more of a can of worms than I thought... Now that I have split up the
> patches I realise that, to use a params structure, we need that to be
> versioned along with the interface.
All right. I reckoned we weren't going to change it that much, and that we
could possibly cover all the changes under the VIF interface version number. I
know individual versioning of structures is a thing, but we need not slavlishly
apply it to everything.
> Also when XENNET is using a down-rev version, which could theoretically be
> behind the latest version in XENVIF, we are going to need a chain of callback
> functions to translate each version of the params structure to/from the
> previous version until we get to the one that XENNET actually deals with.
Yes, that's a possible use case, but hopefully we would know what versions use
what. Again, I was hoping that we weren't going to change the callback params 5
or 6 times in quick succession.
> I have something partially done, but it's going to take another day or so.
OK, thank you.
MH.
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