d43c41fcaf
The *ip* command supports the creation and destruction of TAP devices since 2009 and might be more likely installed on systems then *tunctl*. Therefore it should be tried to setup or teardown the TAP interface with *ip* before falling back to *tunctl*. https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=580fbd88f75cc9eea0d28a48c025b090eb9419a7 (From OE-Core rev: 424ede206baae1c228583aab1df6c18513ac104f) Signed-off-by: Jörg Sommer <joerg.sommer@navimatix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
3.1 KiB
Executable File
#!/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.
SPDX-License-Identifier: GPL-2.0-only
uid=id -u
gid=id -g
if [ -n "$SUDO_UID" ]; then
uid=$SUDO_UID
fi
if [ -n "$SUDO_GID" ]; then
gid=$SUDO_GID
fi
usage() { echo "Usage: sudo $0 <staging_bindir_native>" echo "Where is the numeric user id the tap devices will be owned by" echo "Where is the numeric group id the tap devices will be owned by" echo " is the number of tap devices to create (0 to remove all)" echo " is the path to the build system's native sysroot" echo "For example:" echo "$ bitbake qemu-helper-native" echo "$ sudo $0 $uid $gid 4 tmp/sysroots-components/x86_64/qemu-helper-native/usr/bin" echo "" exit 1 }
if [ $# -ne 4 ]; then echo "Error: Incorrect number of arguments" usage fi
TUID=$1 GID=$2 COUNT=$3 STAGING_BINDIR_NATIVE=$4
check if COUNT is a number and >= 0
if ! [ $COUNT -ge 0 ]; then echo "Error: Incorrect count: $COUNT" exit 1 fi
if [ $EUID -ne 0 ]; then echo "Error: This script must be run with root privileges" exit 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 $SCRIPT_DIR"
exit 1
fi
TUNCTL=$STAGING_BINDIR_NATIVE/tunctl
ip_supports_tuntap=false
if interfaces=ip tuntap list 2>/dev/null; then
ip_supports_tuntap=true
interfaces=echo "$interfaces |cut -f1 -d:
elif ! -x "$TUNCTL" ; then
echo "Error: $TUNCTL is not an executable"
usage
elif interfaces=ip link 2>/dev/null; then
interfaces=echo "$interfaces" | sed '/^[0-9]\+: \(docker[0-9]\+\):.*/!d; s//\1/'
else
echo "Failed to call 'ip link'" >&2
exit 1
fi
Ensure we start with a clean slate
for tap in $interfaces; do echo "Note: Destroying pre-existing tap interface $tap..." if $ip_supports_tuntap; then ip tuntap del $tap mode tap else $TUNCTL -d $tap fi done rm -f /etc/runqemu-nosudo
if [ $COUNT -eq 0 ]; then exit 0 fi
echo "Creating $COUNT tap devices for UID: $TUID GID: $GID..."
for ((index=0; index < $COUNT; index++)); do
echo "Creating tap$index"
if ! ifup=$RUNQEMU_IFUP $TUID $GID $STAGING_BINDIR_NATIVE 2>&1; then
echo "Error running tunctl: $ifup"
exit 1
fi
done
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*"
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