Re: [Xen-devel] Guidelines for new PV protocol submission

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2015-01-20 at 13:47 +0100, Roger Pau Monnà wrote:
> Hello,
> 
> I should probably have done this earlier because I've been aware of this
> issue for a long time (since I've started dealing with the PV blk protocol).
> 
> The current way to describe PV protocols in Xen is very inefficient
> IMHO. Using C structs as "the description" of a binary protocol seems
> very wrong, specially taking into account that different ABIs can
> generate different layouts for the same C struct. This is for example a
> problem in the PV blk protocol, since the binary layout of the
> structures change depending on the bitness.
> 
> In order to avoid this, I would like to request that any new PV protocol
> that's added to Xen be described in binary terms, just like it's
> normally done with other protocols. As a reference see for example the
> following section from the TCP RFC:
> 
> http://tools.ietf.org/html/rfc793#page-15

How about on the next doc day I'll convert netif.h and you do blkif.h?

Ian.


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