diff options
Diffstat (limited to 'scripts/runqemu-gen-tapdevs')
| -rwxr-xr-x | scripts/runqemu-gen-tapdevs | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/scripts/runqemu-gen-tapdevs b/scripts/runqemu-gen-tapdevs new file mode 100755 index 0000000..624deac --- /dev/null +++ b/scripts/runqemu-gen-tapdevs @@ -0,0 +1,100 @@ +#!/bin/bash +# +# Create a "bank" of tap network devices that can be used by the +# runqemu script. This script needs to be run as root, and will +# use the tunctl binary from the build system sysroot. Note: many Linux +# distros these days still use an older version of tunctl which does not +# support the group permissions option, hence the need to use the build +# system provided version. +# +# Copyright (C) 2010 Intel Corp. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 2 as +# published by the Free Software Foundation. +# +# 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., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +usage() { + echo "Usage: sudo $0 <uid> <gid> <num> <native-sysroot-basedir>" + echo "Where <uid> is the numeric user id the tap devices will be owned by" + echo "Where <gid> is the numeric group id the tap devices will be owned by" + echo "<num> is the number of tap devices to create (0 to remove all)" + echo "<native-sysroot-basedir> is the path to the build system's native sysroot" + exit 1 +} + +if [ $EUID -ne 0 ]; then + echo "Error: This script must be run with root privileges" + exit +fi + +if [ $# -ne 4 ]; then + echo "Error: Incorrect number of arguments" + usage +fi + +TUID=$1 +GID=$2 +COUNT=$3 +SYSROOT=$4 + +TUNCTL=$SYSROOT/usr/bin/tunctl +if [[ ! -x "$TUNCTL" || -d "$TUNCTL" ]]; then + echo "Error: $TUNCTL is not an executable" + usage +fi + +SCRIPT_DIR=`dirname $0` +RUNQEMU_IFUP="$SCRIPT_DIR/runqemu-ifup" +if [ ! -x "$RUNQEMU_IFUP" ]; then + echo "Error: Unable to find the runqemu-ifup script in $SCRIPT_DIR" + exit 1 +fi + +IFCONFIG=`which ip 2> /dev/null` +if [ -z "$IFCONFIG" ]; then + # Is it ever anywhere else? + IFCONFIG=/sbin/ip +fi +if [ ! -x "$IFCONFIG" ]; then + echo "$IFCONFIG cannot be executed" + exit 1 +fi + +# Ensure we start with a clean slate +for tap in `$IFCONFIG link | grep tap | awk '{ print \$2 }' | sed s/://`; do + echo "Note: Destroying pre-existing tap interface $tap..." + $TUNCTL -d $tap +done + +echo "Creating $COUNT tap devices for UID: $TUID GID: $GID..." +for ((index=0; index < $COUNT; index++)); do + echo "Creating tap$index" + ifup=`$RUNQEMU_IFUP $TUID $GID $SYSROOT 2>&1` + if [ $? -ne 0 ]; then + echo "Error running tunctl: $ifup" + exit 1 + fi +done + +if [ $COUNT -gt 0 ]; then + echo "Note: For systems running NetworkManager, it's recommended" + echo "Note: that the tap devices be set as unmanaged in the" + echo "Note: NetworkManager.conf file. Add the following lines to" + echo "Note: /etc/NetworkManager/NetworkManager.conf" + echo "[keyfile]" + echo "unmanaged-devices=interface-name:tap*" +fi + +# The runqemu script will check for this file, and if it exists, +# will use the existing bank of tap devices without creating +# additional ones via sudo. +touch /etc/runqemu-nosudo |