7f564c55eb
As both kernel modules are not part of the standard Ubuntu kernel we need to build and load them at runtime. We bundle this together with the container manager start and reuse the classic snap scripts to do the actual build in a proper environment.
133 lines
3 KiB
Bash
Executable file
133 lines
3 KiB
Bash
Executable file
#!/bin/sh
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set -x
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# We need to put the rootfs somewhere where we can modify some
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# parts of the content on first boot (namely file permissions).
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# Other than that nothing should ever modify the content of the
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# rootfs.
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DATA_PATH=$SNAP_COMMON/var/lib/anbox
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ROOTFS_PATH=$DATA_PATH/rootfs
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RAMDISK_PATH=$DATA_PATH/ramdisk
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INITRD=$SNAP/ramdisk.img
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SYSTEM_IMG=$SNAP/system.img
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if [ ! -e $INITRD ]; then
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echo "ERROR: boot ramdisk does not exist"
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exit 1
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fi
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if [ ! -e $SYSTEM_IMG ]; then
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echo "ERROR: system image does not exist"
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exit 1
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fi
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build_kernel_modules() {
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kversion=$1
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rm -rf $SNAP_COMMON/kernel-*
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$SNAP/bin/classic-create || true
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rm -rf $SNAP_COMMON/classic/build
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mkdir -p $SNAP_COMMON/classic/build
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cp -rav $SNAP/ashmem $SNAP_COMMON/classic/build/
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cp -rav $SNAP/binder $SNAP_COMMON/classic/build/
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cat<<EOF > $SNAP_COMMON/classic/build/run.sh
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#!/bin/sh
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set -ex
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apt update
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apt install -y --force-yes linux-headers-$kversion build-essential
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cd /build/ashmem
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make
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cd /build/binder
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make
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EOF
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chmod +x $SNAP_COMMON/classic/build/run.sh
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$SNAP/bin/classic /build/run.sh
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mkdir -p $SNAP_COMMON/kernel-$kversion
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cp $SNAP_COMMON/classic/build/ashmem/ashmem_linux.ko \
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$SNAP_COMMON/kernel-$kversion/
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cp $SNAP_COMMON/classic/build/binder/binder_linux.ko \
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$SNAP_COMMON/kernel-$kversion/
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}
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load_kernel_modules() {
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kversion=`uname -r`
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rmmod ashmem_linux binder_linux || true
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echo "Loading kernel modules for version $kversion.."
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insmod $SNAP_COMMON/kernel-$kversion/binder_linux.ko
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insmod $SNAP_COMMON/kernel-$kversion/ashmem_linux.ko
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sleep 0.5
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chmod 666 /dev/binder
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chmod 666 /dev/ashmem
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}
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start() {
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# Extract ramdisk content instead of trying to bind mount the
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# cpio image file to allow modifications.
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rm -Rf $RAMDISK_PATH
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mkdir -p $RAMDISK_PATH
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cd $RAMDISK_PATH
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cat $INITRD | gzip -d | cpio -i
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# FIXME those things should be fixed in the build process
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chmod +x $RAMDISK_PATH/anbox-init.sh
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# Setup the read-only rootfs
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mkdir -p $ROOTFS_PATH
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mount -o bind,ro $RAMDISK_PATH $ROOTFS_PATH
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mount -o loop,ro $SYSTEM_IMG $ROOTFS_PATH/system
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# but certain top-level directories need to be in a writable space
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for dir in cache data; do
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mkdir -p $DATA_PATH/android-$dir
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mount -o bind $DATA_PATH/android-$dir $ROOTFS_PATH/$dir
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done
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# Make sure our setup path for the container rootfs
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# is present as lxc is statically configured for
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# this path.
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mkdir -p $SNAP_COMMON/lxc
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# We start the bridge here as long as a oneshot service unit is not
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# possible. See snapcraft.yaml for further details.
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$SNAP/bin/anbox-bridge.sh start
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kversion=`uname -r`
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if [ ! -e $SNAP_COMMON/kernel-$kversion ]; then
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build_kernel_modules $kversion
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fi
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load_kernel_modules
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exec $SNAP/usr/sbin/aa-exec -p unconfined -- $SNAP/bin/anbox-wrapper.sh container-manager
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}
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stop() {
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for dir in cache data; do
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umount $ROOTFS_PATH/$dir
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done
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umount $ROOTFS_PATH/system
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umount $ROOTFS_PATH
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$SNAP/bin/anbox-bridge.sh stop
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rmmod ashmem_linux binder_linux || true
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}
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case "$1" in
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start)
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start
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;;
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stop)
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stop
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;;
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*)
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echo "ERROR: Unknown command '$1'"
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exit 1
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;;
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esac
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