From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@suse.de>
Subject: Re: 32-on-64: pvfb issue
Date: Mon, 22 Jan 2007 16:33:11 +0100
Message-ID: <45B4D937.5070502@suse.de>
References: <C1D69CCA.7E66%keir@xensource.com>
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To: Markus Armbruster <armbru@redhat.com>
Cc: Xen devel list <xen-devel@lists.xensource.com>, Keir Fraser <keir@xensource.com>
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Markus Armbruster wrote:
> Gerd Hoffmann <kraxel@suse.de> writes:
> 
>> +	ret = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
>> +			    XEN_IO_PROTO_ABI_NATIVE);
>> +	if (ret)
>> +		goto error_xenbus;
> 
> This identifies the ABI, but how does it provide versioning?

#define XEN_IO_PROTO_FB_GRANT_TABLES "fb-grant-tables" ?

Just create a descriptive name you like.  Assuming we don't create
abi-dependent structs *again* when we change the protocol.

We can of course also just use XEN_IO_PROTO_ABI_NATIVE "-v2".  With the
protocol identifier being a string there lots of ways ...

cheers,
  Gerd

-- 
Gerd Hoffmann <kraxel@suse.de>