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Richard Purdie 609fc15718 runqemu/qemu-helper: Drop tunctl

ip tuntap provides the functionality that we obtained from tunctl. We only
needed tunctl when ifconfig was more available than ip. That isn't the case
now so we can drop tunctl and all the hoops we need to jump through to build
and provide it.

(From OE-Core rev: 2abfbca690ff00cb58ce08a65cde006578ee3de9)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2023-06-16 15:40:11 +01:00

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#!/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

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

if interfaces=ip tuntap list 2>/dev/null; then interfaces=echo "$interfaces |cut -f1 -d: else echo "Failed to call 'ip tuntap list'" >&2 exit 1 fi

Ensure we start with a clean slate

for tap in $interfaces; do echo "Note: Destroying pre-existing tap interface $tap..." ip tuntap del $tap mode tap 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 2>&1; then echo "Error bringing up interface: $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

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