From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [PATCH] virtio_console: Add support for multiple ports for generic guest and host communication Date: Tue, 15 Sep 2009 16:08:24 +0200 Message-ID: <4AAF9FD8.1010008@redhat.com> References: <1252678386-17404-1-git-send-email-amit.shah@redhat.com> <1252678386-17404-2-git-send-email-amit.shah@redhat.com> <20090911170010.34c80f2d@linux.intel.com> <20090915123752.GB5247@amit-x200.redhat.com> <4AAF8F26.8030503@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4AAF8F26.8030503@codemonkey.ws> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Anthony Liguori Cc: greg@kroah.com, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Amit Shah , Alan Cox List-Id: virtualization@lists.linuxfoundation.org On 09/15/09 14:57, Anthony Liguori wrote: > That's probably not what we want. I imagine what we want is: > > /dev/ttyV0 > /dev/ttyV1 > /dev/ttyVN Yes. > And then we want: > > /sys/class/virtio-console/ttyV0/name -> "org.qemu.clipboard" Yes. > Userspace can detect when new virtio-consoles appear via udev events. > When it sees a new ttyVN, it can then look in sysfs to discover it's name. No. udev can create symlinks for you, so apps don't have to dig into sysfs. You'll need a rule along the lines (untested): SUBSYSTEM=="virtio", \ DRIVERS="virtio-console", \ SYMLINK+="vcon/$attr{name}" then udev will create a /dev/vcon/org.qemu.clipboard symlink pointing to dev/ttyV0. Apps can just open /dev/vcon/$name then. cheers, Gerd