| #!/bin/bash |
| # |
| # Copyright (C) 2021 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| set -e |
| set -u |
| |
| trap "echo 1 >${exitcode}" ERR |
| |
| # So we have a rw location to extract kmod |
| mount -t tmpfs tmpfs /tmp |
| |
| # Extract kmod utility to /tmp |
| dpkg-deb -x /var/cache/apt/archives/kmod*.deb /tmp |
| ln -s /tmp/bin/kmod /tmp/insmod |
| |
| # Load just enough to get the rootfs from virtio_blk |
| module_dir=/lib/modules/$(uname -r)/kernel |
| # virtio_pci_modern_dev.ko for 5.12-5.19 kernel |
| if [ -e "${module_dir}/drivers/virtio/virtio_pci_modern_dev.ko" ]; then |
| /tmp/insmod ${module_dir}/drivers/virtio/virtio_pci_modern_dev.ko || sh |
| fi |
| # virtio_pci_legacy_dev.ko for 6.0+ kernel |
| if [ -e "${module_dir}/drivers/virtio/virtio_pci_legacy_dev.ko" ]; then |
| /tmp/insmod ${module_dir}/drivers/virtio/virtio_pci_legacy_dev.ko |
| fi |
| /tmp/insmod ${module_dir}/drivers/virtio/virtio_pci.ko |
| /tmp/insmod ${module_dir}/drivers/block/virtio_blk.ko |
| /tmp/insmod ${module_dir}/drivers/char/hw_random/virtio-rng.ko |
| |
| # Mount devtmpfs so we can see /dev/vda |
| mount -t devtmpfs devtmpfs /dev |
| |
| # Mount /dev/vda over the top of /root |
| rm -f /dev/ram0 |
| mount -n -t proc proc /proc |
| mount LABEL=ROOT /root |
| if [[ "${install_grub}" = "1" ]]; then |
| mkdir -p /root/boot/efi |
| mount LABEL=SYSTEM /root/boot/efi |
| fi |
| umount /proc |
| |
| # Switch to the new root and start stage 2 |
| mount -n --move /dev /root/dev |
| mount -n --move /tmp /root/tmp |
| mount -n -t proc none /root/proc |
| mount -n -t sysfs none /root/sys |
| mount -n -t tmpfs tmpfs /root/run |
| pivot_root /root /root/host |
| exec chroot / /root/stage2.sh ${exitcode} </dev/console >/dev/console 2>&1 |