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a308b39eae
BUG=None TEST=run the commands in various combinations. Change-Id: I94fb167d8312a90818910085adebfb1d0396cdbe Reviewed-on: http://gerrit.chromium.org/gerrit/6866 Reviewed-by: Chris Sosa <sosa@chromium.org> Reviewed-by: Vince Laviano <vlaviano@chromium.org> Tested-by: Richard Barnette <jrbarnette@chromium.org>
267 lines
9.4 KiB
Bash
Executable File
267 lines
9.4 KiB
Bash
Executable File
# Copyright (c) 2011 The Chromium OS 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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# Shell function library and global variable initialization for
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# creating an initial base image. The main function for export in
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# this library is 'create_base_image'; the remainder of the code is
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# not used outside this file.
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# Configure extra USE flags and packages for factory install shim
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# images.
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EXTRA_PACKAGES=""
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if [ ${FLAGS_factory_install} -eq ${FLAGS_TRUE} ] ; then
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# Factory install needs to have the factory installer added.
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EXTRA_PACKAGES="${EXTRA_PACKAGES} chromeos-base/chromeos-factoryinstall"
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# On x86, we boot the factory install shim from an SD card using
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# initramfs for our root. On ARM, we boot the factory install shim
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# over the network, so we don't require initramfs, but we do require
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# fbconsole to fix a display driver bug.
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if [ "${ARCH}" = "x86" ] ; then
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export USE="${USE} initramfs"
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fi
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# CONFIG_BLK_DEV_RAM is disabled by default.
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# But tftp install needs it to mount rootfs in ram
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if [ "${ARCH}" = "arm" ] ; then
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export USE="${USE} fbconsole blkdevram"
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fi
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fi
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ROOT_LOOP_DEV=
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STATEFUL_LOOP_DEV=
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ROOT_FS_IMG="${OUTPUT_DIR}/rootfs.image"
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STATEFUL_FS_IMG="${OUTPUT_DIR}/stateful_partition.image"
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ESP_FS_IMG=${OUTPUT_DIR}/esp.image
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cleanup_rootfs_loop() {
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sudo umount -d "${ROOT_FS_DIR}"
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}
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cleanup_stateful_fs_loop() {
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sudo umount "${ROOT_FS_DIR}/usr/local"
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sudo umount "${ROOT_FS_DIR}/var"
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sudo umount -d "${STATEFUL_FS_DIR}"
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}
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loopback_cleanup() {
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# Disable die on error.
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set +e
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if [[ -n "${STATEFUL_LOOP_DEV}" ]]; then
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cleanup_stateful_fs_loop
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STATEFUL_LOOP_DEV=
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fi
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if [[ -n "${ROOT_LOOP_DEV}" ]]; then
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cleanup_rootfs_loop
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ROOT_LOOP_DEV=
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fi
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# Turn die on error back on.
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set -e
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}
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zero_free_space() {
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local fs_mount_point=$1
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info "Zeroing freespace in ${fs_mount_point}"
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# dd is a silly thing and will produce a "No space left on device" message
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# that cannot be turned off and is confusing to unsuspecting victims.
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( sudo dd if=/dev/zero of="${fs_mount_point}/filler" bs=4096 \
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|| true ) 2>&1 | grep -v "No space left on device"
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}
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create_base_image() {
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local image_name=$1
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trap "loopback_cleanup && delete_prompt" EXIT
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# Create and format the root file system.
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# Create root file system disk image.
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ROOT_SIZE_BYTES=$((1024 * 1024 * ${FLAGS_rootfs_size}))
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# Pad out for the hash tree.
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ROOT_HASH_PAD=$((FLAGS_rootfs_hash_pad * 1024 * 1024))
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info "Padding the rootfs image by ${ROOT_HASH_PAD} bytes for hash data"
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dd if=/dev/zero of="${ROOT_FS_IMG}" bs=1 count=1 \
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seek=$((ROOT_SIZE_BYTES + ROOT_HASH_PAD - 1))
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ROOT_LOOP_DEV=$(sudo losetup --show -f "${ROOT_FS_IMG}")
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if [ -z "${ROOT_LOOP_DEV}" ] ; then
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echo "No free loop device. Free up a loop device or reboot. exiting. "
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exit 1
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fi
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# Specify a block size and block count to avoid using the hash pad.
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sudo mkfs.ext2 -b 4096 "${ROOT_LOOP_DEV}" "$((ROOT_SIZE_BYTES / 4096))"
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# Tune and mount rootfs.
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DISK_LABEL="C-ROOT"
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# Disable checking and minimize metadata differences across builds
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# and wasted reserved space.
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sudo tune2fs -L "${DISK_LABEL}" \
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-U clear \
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-T 20091119110000 \
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-c 0 \
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-i 0 \
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-m 0 \
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-r 0 \
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-e remount-ro \
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"${ROOT_LOOP_DEV}"
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# TODO(wad) call tune2fs prior to finalization to set the mount count to 0.
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sudo mount -t ext2 "${ROOT_LOOP_DEV}" "${ROOT_FS_DIR}"
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# Create stateful partition of the same size as the rootfs.
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STATEFUL_SIZE_BYTES=$((1024 * 1024 * ${FLAGS_statefulfs_size}))
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dd if=/dev/zero of="${STATEFUL_FS_IMG}" bs=1 count=1 \
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seek=$((STATEFUL_SIZE_BYTES - 1))
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# Tune and mount the stateful partition.
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UUID=$(uuidgen)
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DISK_LABEL="C-STATE"
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STATEFUL_LOOP_DEV=$(sudo losetup --show -f "${STATEFUL_FS_IMG}")
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if [ -z "${STATEFUL_LOOP_DEV}" ] ; then
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echo "No free loop device. Free up a loop device or reboot. exiting. "
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exit 1
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fi
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sudo mkfs.ext3 "${STATEFUL_LOOP_DEV}"
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sudo tune2fs -L "${DISK_LABEL}" -U "${UUID}" -c 0 -i 0 "${STATEFUL_LOOP_DEV}"
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sudo mount -t ext3 "${STATEFUL_LOOP_DEV}" "${STATEFUL_FS_DIR}"
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# -- Install packages into the root file system --
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# Prepare stateful partition with some pre-created directories.
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sudo mkdir -p "${DEV_IMAGE_ROOT}"
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sudo mkdir -p "${STATEFUL_FS_DIR}/var"
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# Create symlinks so that /usr/local/usr based directories are symlinked to
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# /usr/local/ directories e.g. /usr/local/usr/bin -> /usr/local/bin, etc.
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setup_symlinks_on_root "${DEV_IMAGE_ROOT}" "${STATEFUL_FS_DIR}/var" \
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"${STATEFUL_FS_DIR}"
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# Perform binding rather than symlinking because directories must exist
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# on rootfs so that we can bind at run-time since rootfs is read-only.
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echo "Binding directories from stateful partition onto the rootfs"
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sudo mkdir -p "${ROOT_FS_DIR}/usr/local"
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sudo mount --bind "${DEV_IMAGE_ROOT}" "${ROOT_FS_DIR}/usr/local"
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sudo mkdir -p "${ROOT_FS_DIR}/var"
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sudo mount --bind "${STATEFUL_FS_DIR}/var" "${ROOT_FS_DIR}/var"
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sudo mkdir -p "${ROOT_FS_DIR}/dev"
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# We need to install libc manually from the cross toolchain.
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# TODO: Improve this? It would be ideal to use emerge to do this.
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PKGDIR="/var/lib/portage/pkgs"
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LIBC_TAR="glibc-${LIBC_VERSION}.tbz2"
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LIBC_PATH="${PKGDIR}/cross-${CHOST}/${LIBC_TAR}"
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sudo tar jxvpf "${LIBC_PATH}" -C "${ROOT_FS_DIR}" ./usr/${CHOST} \
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--strip-components=3 --exclude=usr/include --exclude=sys-include \
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--exclude=*.a --exclude=*.o
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# If it's a developer image, also copy over the libc debug info so that gdb
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# works with threads and also for a better debugging experience.
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if [[ ${FLAGS_withdev} -eq ${FLAGS_TRUE} ]] ; then
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sudo mkdir -p "${ROOT_FS_DIR}/usr/local/lib/debug"
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sudo tar jxvpf "${LIBC_PATH}" -C "${ROOT_FS_DIR}/usr/local/lib/debug" \
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./usr/lib/debug/usr/${CHOST} --strip-components=6
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fi
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. "${SRC_ROOT}/platform/dev/toolchain_utils.sh"
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board_ctarget=$(get_ctarget_from_board "${BOARD}")
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for atom in $(portageq match / cross-$board_ctarget/gcc); do
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copy_gcc_libs "${ROOT_FS_DIR}" $atom
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done
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if [ ${FLAGS_factory_install} -eq ${FLAGS_TRUE} ]; then
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# Install our custom factory install kernel with the appropriate use flags
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# to the image.
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emerge_custom_kernel "${ROOT_FS_DIR}"
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fi
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# We "emerge --root=${ROOT_FS_DIR} --root-deps=rdeps --usepkgonly" all of the
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# runtime packages for chrome os. This builds up a chrome os image from
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# binary packages with runtime dependencies only. We use INSTALL_MASK to
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# trim the image size as much as possible.
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emerge_to_image --root="${ROOT_FS_DIR}" chromeos ${EXTRA_PACKAGES}
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# Set /etc/lsb-release on the image.
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"${OVERLAY_CHROMEOS_DIR}/scripts/cros_set_lsb_release" \
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--root="${ROOT_FS_DIR}" \
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--board="${BOARD}"
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# Populates the root filesystem with legacy bootloader templates
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# appropriate for the platform. The autoupdater and installer will
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# use those templates to update the legacy boot partition (12/ESP)
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# on update.
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# (This script does not populate vmlinuz.A and .B needed by syslinux.)
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local enable_rootfs_verification=
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if [[ ${FLAGS_enable_rootfs_verification} -eq ${FLAGS_TRUE} ]]; then
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enable_rootfs_verification="--enable_rootfs_verification"
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fi
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${BUILD_LIBRARY_DIR}/create_legacy_bootloader_templates.sh \
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--arch=${ARCH} \
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--to="${ROOT_FS_DIR}"/boot \
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--boot_args="${FLAGS_boot_args}" \
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${enable_rootfs_verification}
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# Don't test the factory install shim
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if [ ${FLAGS_factory_install} -eq ${FLAGS_FALSE} ]; then
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# Check that the image has been correctly created.
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test_image_content "$ROOT_FS_DIR"
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fi
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# Clean up symlinks so they work on a running target rooted at "/".
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# Here development packages are rooted at /usr/local. However, do not
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# create /usr/local or /var on host (already exist on target).
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setup_symlinks_on_root "/usr/local" "/var" "${STATEFUL_FS_DIR}"
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# Create EFI System Partition to boot stock EFI BIOS (but not
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# ChromeOS EFI BIOS). ARM uses this space to determine which
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# partition is bootable. NOTE: The size argument for mkfs.vfat is
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# in 1024-byte blocks. We'll hard-code it to 16M for now.
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/usr/sbin/mkfs.vfat -C "${ESP_FS_IMG}" 16384
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# Zero rootfs free space to make it more compressible so auto-update
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# payloads become smaller
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zero_free_space "${ROOT_FS_DIR}"
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loopback_cleanup
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trap delete_prompt EXIT
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# Now that the filler file has been sync'd to disk and has filled
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# up all free space with zeros, re-mount the rootfs to delete the
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# filler file.
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ROOT_LOOP_DEV=$(sudo losetup --show -f "${ROOT_FS_IMG}")
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sudo mount -t ext2 "${ROOT_LOOP_DEV}" "${ROOT_FS_DIR}"
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sudo rm -f "${ROOT_FS_DIR}/filler"
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sudo umount -d "${ROOT_FS_DIR}"
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# Create the GPT-formatted image.
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build_gpt "${OUTPUT_DIR}/${image_name}" \
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"${ROOT_FS_IMG}" \
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"${STATEFUL_FS_IMG}" \
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"${ESP_FS_IMG}"
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# Clean up temporary files.
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rm -f "${ROOT_FS_IMG}" "${STATEFUL_FS_IMG}" "${ESP_FS_IMG}"
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# Emit helpful scripts for testers, etc.
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emit_gpt_scripts "${OUTPUT_DIR}/${image_name}" "${OUTPUT_DIR}"
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trap - EXIT
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USE_DEV_KEYS=
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if [ ${FLAGS_factory_install} -eq ${FLAGS_TRUE} ]; then
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USE_DEV_KEYS="--use_dev_keys"
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fi
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# Place flags before positional args
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${SCRIPTS_DIR}/bin/cros_make_image_bootable "${OUTPUT_DIR}" \
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"${PRISTINE_IMAGE_NAME}" \
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${USE_DEV_KEYS}
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}
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