3 # Copyright (c) 2010, 2018
4 # The DragonFly Project. All rights reserved.
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
10 # 1. Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in
14 # the documentation and/or other materials provided with the
16 # 3. Neither the name of The DragonFly Project nor the names of its
17 # contributors may be used to endorse or promote products derived
18 # from this software without specific, prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 # COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 # INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 # This tool packs the (statically linked) rescue tools (at /rescue by
38 # default) and contents specified by "-c <content_dirs>", such as the
39 # necessary etc files, into an UFS-formatted VN image. This image is
40 # installed at /boot/kernel/initrd.img.gz and used as the initial ramdisk
41 # to help mount the real root filesystem when it is encrypted or on LVM.
46 # Default configurations
49 # Directory hierarchy on the initrad
51 # * 'new_root' will always be created
52 # * 'sbin' will be symlinked to 'bin'
53 # * 'tmp' will be symlinked to 'var/tmp'
55 INITRD_DIRS="bin dev etc mnt var"
57 # Directory of the statically linked rescue tools which will be copied
61 # Specify the location that the initrd will be installed to, i.e.,
62 # <BOOT_DIR>/kernel/initrd.img.gz
65 # Maximum size (number of MB) allowed for the initrd image
66 INITRD_SIZE_MAX="15" # MB
87 error 1 "Directory '${_dir}' does not exist"
92 # Calculate the total size of the given directory, taking care of the
95 # NOTE: Do not use 'du' since it gives the disk usage of the files,
96 # which varies between different filesystems.
100 awk '{ print $7,$1 }' | \
103 awk '{ sum+=$1 } END { print sum }' # byte
112 log "Calculating required initrd size ..."
115 csize=$(calc_size ${_dir})
116 log "* ${_dir}: ${csize} bytes"
117 isize=$((${isize} + ${csize}))
119 # Round initrd size up by MB
120 isize_mb=$(echo ${isize} | awk '
123 return (x>y ? y+1 : y);
129 # Add additional 1 MB
130 echo $((${isize_mb} + 1))
135 VN_DEV=$(vnconfig -c -S ${INITRD_SIZE}m -Z -T vn ${INITRD_FILE}) &&
136 echo "Configured ${VN_DEV}" ||
137 error 1 "Failed to configure VN device"
139 newfs -i 131072 -m 0 /dev/${VN_DEV}s0 &&
140 echo "Formatted initrd image with UFS" ||
141 error 1 "Failed to format the initrd image"
142 mount_ufs /dev/${VN_DEV}s0 ${BUILD_DIR} &&
143 echo "Mounted initrd image on ${BUILD_DIR}" ||
144 error 1 "Failed to mount initrd image on ${BUILD_DIR}"
148 umount /dev/${VN_DEV}s0 &&
149 echo "Unmounted initrd image" ||
150 error 1 "Failed to umount initrd image"
151 vnconfig -u ${VN_DEV} &&
152 echo "Unconfigured ${VN_DEV}" ||
153 error 1 "Failed to unconfigure ${VN_DEV}"
157 mkdir -p ${BUILD_DIR}/new_root
158 # Symlink 'sbin' to 'bin'
159 ln -sf bin ${BUILD_DIR}/sbin
160 # Symlink 'tmp' to 'var/tmp', as '/var' will be mounted with
161 # tmpfs, saving a second tmpfs been mounted on '/tmp'.
162 ln -sf var/tmp ${BUILD_DIR}/tmp
163 for _dir in ${INITRD_DIRS}; do
164 [ ! -d "${BUILD_DIR}/${_dir}" ] &&
165 mkdir -p ${BUILD_DIR}/${_dir}
167 echo "Created directory structure"
171 cpdup -o -u ${RESCUE_DIR}/ ${BUILD_DIR}/bin/ &&
172 echo "Copied ${RESCUE_DIR} to ${BUILD_DIR}/bin" ||
173 error 1 "Failed to copy ${RESCUE_DIR} to ${BUILD_DIR}/bin"
177 for _dir in ${CONTENT_DIRS}; do
178 cpdup -o -u ${_dir}/ ${BUILD_DIR}/ &&
179 echo "Copied ${_dir} to ${BUILD_DIR}" ||
180 error 1 "Failed to copy ${dir} to ${BUILD_DIR}"
189 # Check the validity of the created initrd image before moving over.
190 # This prevents creating an empty and broken initrd image by running
191 # this tool but without ${CONTENT_DIRS} prepared.
193 # NOTE: Need more improvements.
197 [ -x "${BUILD_DIR}/sbin/oinit" ] || {
199 error 1 "Created initrd image is invalid!"
205 "usage: ${0##*/} [-b boot_dir] [-r rescue_dir]" \
206 "[-s size] [-S max_size] -c <content_dirs>"
214 while getopts :b:c:hr:s:S: opt; do
220 CONTENT_DIRS="${OPTARG}"
226 RESCUE_DIR="${OPTARG}"
229 INITRD_SIZE="${OPTARG}"
232 INITRD_SIZE_MAX="${OPTARG}"
235 log "Invalid option -${OPTARG}"
239 log "Option -${OPTARG} requires an argument"
245 shift $((OPTIND - 1))
246 [ $# -ne 0 ] && usage
247 [ -z "${BOOT_DIR}" -o -z "${RESCUE_DIR}" -o -z "${CONTENT_DIRS}" ] && usage
248 check_dirs ${BOOT_DIR} ${RESCUE_DIR} ${CONTENT_DIRS}
251 INITRD_SIZE=${INITRD_SIZE%[mM]} # MB
252 INITRD_SIZE_MAX=${INITRD_SIZE_MAX%[mM]} # MB
254 BUILD_DIR=$(mktemp -d -t initrd) || error $? "Cannot create build directory"
255 echo "Initrd build directory: ${BUILD_DIR}"
256 INITRD_FILE="${BUILD_DIR}.img"
257 INITRD_DEST="${BOOT_DIR}/kernel/initrd.img.gz"
259 CSIZE=$(calc_initrd_size ${RESCUE_DIR} ${CONTENT_DIRS})
260 echo "Required initrd image size: ${CSIZE} MB"
261 if [ -n "${INITRD_SIZE}" -a "${INITRD_SIZE}" != "0" ]; then
262 if [ ${CSIZE} -gt ${INITRD_SIZE} ]; then
263 error 1 "Given initrd size (${INITRD_SIZE} MB) too small"
268 echo "Initrd size: ${INITRD_SIZE} MB"
270 if [ -n "${INITRD_SIZE_MAX}" -a "${INITRD_SIZE_MAX}" != "0" ] && \
271 [ ${INITRD_SIZE} -gt ${INITRD_SIZE_MAX} ]; then
272 error 1 "Exceeded the maximum size (${INITRD_SIZE_MAX} MB)"
283 echo -n "Compressing ${INITRD_FILE} ..."
284 gzip -9 ${INITRD_FILE}
287 if [ -f "${INITRD_DEST}" ]; then
288 echo -n "Backing up ${INITRD_DEST} ..."
289 mv ${INITRD_DEST} ${INITRD_DEST}.old
290 echo " OK (${INITRD_DEST}.old)"
293 echo -n "Copying ${INITRD_FILE}.gz to ${INITRD_DEST} ..."
294 mv ${INITRD_FILE}.gz ${INITRD_DEST}