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runqemu: Add network bridge support

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Qemu supports attaching the virtual machine to an existing network
bridge interface via the qemu-bridge-helper program (as long as the
system is correctly configured to give the user permissions). Add
support for runqemu to do this also via the "bridge=<INTERFACE>"
argument. Note that for this to work correctly, the host
qemu-bridge-helper must be used, not the one that might have been built
by qemu-native. In order for qemu to correctly find this program, a
qemu-oe-bridge-helper program has been added to qemu-helper-native, and
runqemu will use this helper as the bridge helper. The helper will look
for the host qemu-bridge-helper first by looking in the
QEMU_BRIDGE_HELPER environment variable, then by search common paths
where the helper is installed.

(From OE-Core rev: 9e7b38c61c6b84b7f137c733ac5da9414025693d)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Joshua Watt
2020-01-08 13:48:07 -06:00
committed by Richard Purdie
parent 1128c128ce
commit 08220028e5
3 changed files with 42 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/qemu/qemu-helper-native_1.0.bb
+6 -1
View File
@@ -5,7 +5,10 @@ PR = "r1"
LIC_FILES_CHKSUM = "file://${WORKDIR}/tunctl.c;endline=4;md5=ff3a09996bc5fff6bc5d4e0b4c28f999"
SRC_URI = "file://tunctl.c"
SRC_URI = "\
file://tunctl.c \
file://qemu-oe-bridge-helper \
"
S = "${WORKDIR}"
@@ -18,6 +21,8 @@ do_compile() {
do_install() {
install -d ${D}${bindir}
install tunctl ${D}${bindir}/
install -m 755 ${WORKDIR}/qemu-oe-bridge-helper ${D}${bindir}/
}
DEPENDS += "qemu-system-native"
meta/recipes-devtools/qemu/qemu-helper/qemu-oe-bridge-helper
Executable
+25
View File
@@ -0,0 +1,25 @@
#! /bin/sh
# Copyright 2020 Garmin Ltd. or its subsidiaries
#
# SPDX-License-Identifier: GPL-2.0
#
# Attempts to find and exec the host qemu-bridge-helper program
# If the QEMU_BRIDGE_HELPER variable is set by the user, exec it.
if [ -n "$QEMU_BRIDGE_HELPER" ]; then
exec "$QEMU_BRIDGE_HELPER" "$@"
fi
# Search common paths for the helper program
BN="qemu-bridge-helper"
PATHS="/usr/libexec/ /usr/lib/qemu/"
for p in $PATHS; do
if [ -e "$p/$BN" ]; then
exec "$p/$BN" "$@"
fi
done
echo "$BN not found!" > /dev/stderr
exit 1