scripts/vps-pci.in

#!/bin/sh
#  Copyright (C) 2010, Parallels, Inc. All rights reserved.
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#
# This script is executed in the CT0 context after moving
# PCI devices into or out of CT (vzctl set $CTID --pci_add/--pci_del).
# It is supposed to take care about actions needed to properly
# add/remove certain PCI devices.
#
# Parameters are passed in environment variables:
#   VEID	- container ID
#   PCI		- list of PCI devices
#   ADD		- boolean flag (1 - add, 0 - del)
#
# Currently this only supports adding/removing of NVidia video cards.

VZCTL=vzctl
SELF=$(basename $0)

# Prepare nVidia video card for using in CT
handle_nvidia_device()
{
	local pci major minor dev card dev_num PCI
	local nv_proc=/proc/driver/nvidia
	PCI=$1

	lspci -s $PCI | grep -qi VGA.*nvidia || return

	modprobe nvidia > /dev/null
	if [ $? -ne 0 ]; then
		echo "$SELF: can't load module nvidia" 1>&2
		return
	fi

	major=$(cat /proc/devices | awk '/nvidia/ {print $1}')
	for card in $(ls $nv_proc/cards/); do
		pci=$(cat $nv_proc/cards/$card | awk '/Bus Location/ {print $3}')
		unify_dev()
		{
			echo $1 | sed 's/:/./g' # I love debian!
		}
		if [ "$(unify_dev $pci)" = "$(unify_dev $PCI)" ]; then
			dev_num=$card
			break
		fi
	done

	if [ -z "$dev_num" ]; then
		echo "$SELF: Unknown device $PCI" 1>&2
		return
	fi

	for dev in nvidiactl nvidia$dev_num; do
		if [ ! -e /dev/$dev ]; then
			if [ "nvidiactl" = "$dev" ]; then
				minor=255
			else
				minor=$dev_num
			fi
			mknod /dev/$dev c $major $minor
			if [ $? -ne 0 ]; then
				echo "$SELF: Can't create device $dev" 1>&2
				return
			fi
		fi
		if [ "$ADD" = 1 ]; then
			$VZCTL --quiet --skiplock set $VEID --devnodes $dev:rw
		else
			$VZCTL --quiet --skiplock set $VEID --devnodes $dev:none
		fi
		if [ $? -ne 0 ]; then
			echo "$SELF: Can't give access to device $dev" 1>&2
			return
		fi
	done
}

for dev in $PCI; do
	handle_nvidia_device $dev
done
exit 0