|
From: | Gerd Hoffmann |
Subject: | Re: [Qemu-devel] Re: virtio-serial: An interface for host-guest communication |
Date: | Thu, 20 Aug 2009 09:44:29 +0200 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Lightning/1.0pre Thunderbird/3.0b2 |
On 08/20/09 09:31, Rusty Russell wrote:
On Sat, 15 Aug 2009 01:55:32 am Anthony Liguori wrote:Gerd Hoffmann wrote:Also I still think passing a 'protocol' string for each port is a good idea, so you can stick that into a sysfs file for guests use.Or drops ports altogether and just use protocol strings...Both is silly, yes. I guess strings + HAL magic can make the /dev names sane. I don't want to see userspace trolling through sysfs to figure out what device to open.
udev can create sane /dev names (or symlinks) by checking sysfs attributes, apps just open the /dev/whatever then.
Which is why I prefer assigned numbers, which get mapped to minors.
ports map trivially to minors. When using protocol strings minors can simply be dynamically auto-allocated by the guest and we don't need the port numbers in the host<->guest protocol any more.
I think strings are better as numbers for identifying protocols as you can work without a central registry for the numbers then.
cheers, Gerd
[Prev in Thread] | Current Thread | [Next in Thread] |