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bb1c2559fb
I am unsure exactly what situation is causing the loopback partition device node to not exist when it is being mounted but this should help work around the situation and log loudly about it so we can hopefully figure out where to dig further.
147 lines
4.5 KiB
Bash
Executable File
147 lines
4.5 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2014 The CoreOS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# Replacement script for 'grub-install' which does not detect drives
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# properly when partitions are mounted via individual loopback devices.
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SCRIPT_ROOT=$(readlink -f $(dirname "$0")/..)
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. "${SCRIPT_ROOT}/common.sh" || exit 1
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# We're invoked only by build_image, which runs in the chroot
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assert_inside_chroot
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# Flags.
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DEFINE_string target "" \
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"The GRUB target to install such as i386-pc or x86_64-efi"
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DEFINE_string esp_dir "" \
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"Path to EFI System partition mount point."
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DEFINE_string disk_image "" \
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"The disk image containing the EFI System partition."
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# Parse flags
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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switch_to_strict_mode
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# Our GRUB lives under coreos/grub so new pygrub versions cannot find grub.cfg
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GRUB_DIR="coreos/grub/${FLAGS_target}"
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# Assumes the ESP is the first partition, GRUB cannot search for it by type.
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GRUB_PREFIX="(,gpt1)/coreos/grub"
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# Modules required to find and read everything else from ESP
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CORE_MODULES=( fat part_gpt gzio )
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# Name of the core image, depends on target
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CORE_NAME=
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case "${FLAGS_target}" in
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i386-pc)
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CORE_MODULES+=( biosdisk )
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CORE_NAME="core.img"
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;;
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x86_64-efi)
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CORE_NAME="core.efi"
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;;
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*)
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die_notrace "Unknown GRUB target ${FLAGS_target}"
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;;
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esac
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# In order for grub-setup-bios to properly detect the layout of the disk
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# image it expects a normal partitioned block device. For most of the build
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# disk_util maps individual loop devices to each partition in the image so
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# the kernel can automatically detach the loop devices on unmount. When
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# using a single loop device with partitions there is no such cleanup.
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# That's the story of why this script has all this goo for loop and mount.
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STAGE_DIR=
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ESP_DIR=
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LOOP_DEV=
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cleanup() {
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if [[ -d "${STAGE_DIR}" ]]; then
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rm -rf "${STAGE_DIR}"
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fi
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if [[ -d "${ESP_DIR}" ]]; then
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if mountpoint -q "${ESP_DIR}"; then
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sudo umount "${ESP_DIR}"
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fi
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rm -rf "${ESP_DIR}"
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fi
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if [[ -b "${LOOP_DEV}" ]]; then
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sudo losetup --detach "${LOOP_DEV}"
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fi
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}
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trap cleanup EXIT
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STAGE_DIR=$(mktemp --directory)
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mkdir -p "${STAGE_DIR}/${GRUB_DIR}"
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info "Compressing modules in ${GRUB_DIR}"
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for file in "/usr/lib/grub/${FLAGS_target}"/*{.lst,.mod}; do
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out="${STAGE_DIR}/${GRUB_DIR}/${file##*/}"
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gzip --best --stdout "${file}" > "${out}"
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done
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info "Generating ${GRUB_DIR}/${CORE_NAME}"
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grub-mkimage \
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--compression=auto \
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--format "${FLAGS_target}" \
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--prefix "${GRUB_PREFIX}" \
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--output "${STAGE_DIR}/${GRUB_DIR}/${CORE_NAME}" \
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"${CORE_MODULES[@]}"
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info "Installing GRUB ${FLAGS_target} to ${FLAGS_disk_image##*/}"
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LOOP_DEV=$(sudo losetup --find --show --partscan "${FLAGS_disk_image}")
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ESP_DIR=$(mktemp --directory)
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# work around slow/buggy udev, make sure the node is there before mounting
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if [[ ! -b "${LOOP_DEV}p1" ]]; then
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# sleep a little just in case udev is ok but just not finished yet
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warn "loopback device node ${LOOP_DEV}p1 missing, waiting on udev..."
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sleep 0.5
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for (( i=0; i<5; i++ )); do
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if [[ -b "${LOOP_DEV}p1" ]]; then
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break
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fi
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warn "looback device node still ${LOOP_DEV}p1 missing, reprobing..."
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blockdev --rereadpt ${LOOP_DEV}
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sleep 0.5
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done
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if [[ ! -b "${LOOP_DEV}p1" ]]; then
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failboat "${LOOP_DEV}p1 where art thou? udev has forsaken us!"
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fi
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fi
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sudo mount -t vfat "${LOOP_DEV}p1" "${ESP_DIR}"
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sudo cp -r "${STAGE_DIR}/." "${ESP_DIR}/."
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# This script will get called a few times, no need to re-copy grub.cfg
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if [[ ! -f "${ESP_DIR}/coreos/grub/grub.cfg" ]]; then
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info "Installing grub.cfg"
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sudo cp "${BUILD_LIBRARY_DIR}/grub.cfg" "${ESP_DIR}/coreos/grub/grub.cfg"
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fi
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# Now target specific steps to make the system bootable
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case "${FLAGS_target}" in
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i386-pc)
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info "Installing MBR and the BIOS Boot partition."
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sudo cp "/usr/lib/grub/i386-pc/boot.img" "${ESP_DIR}/${GRUB_DIR}"
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sudo grub-bios-setup --device-map=/dev/null \
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--directory="${ESP_DIR}/${GRUB_DIR}" "${LOOP_DEV}"
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;;
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x86_64-efi)
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info "Installing default x86_64 UEFI bootloader."
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sudo mkdir -p "${ESP_DIR}/EFI/boot"
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sudo cp "${STAGE_DIR}/${GRUB_DIR}/${CORE_NAME}" \
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"${ESP_DIR}/EFI/boot/bootx64.efi"
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;;
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esac
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cleanup
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trap - EXIT
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command_completed
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