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

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Mon, 2015-02-09 at 12:01 +0100, Roger Pau Monnà wrote:
> El 05/02/15 a les 11.42, Ian Campbell ha escrit:
> > 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?
> 
> Sounds like a plan, although I think I got the short straw ;).

I know :-P

Ian.


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