Add 3 scripts which are useful for making images for usermode, or any
embedded platform in particular. + mkimage will make an autosized image in a file (using vnd) from sets the resulting image can be mounted read-only, with tmpfs used for volatile files on top of read-only bases + mkpkgs will make an autosized image in a file (using vnd) from binary packages + usermode is an easy way to invoke usermode, making sure that bridging is set up properly, and that the host syscallemu module is loaded. This script then runs usermode with two file images (as produced by mkimage and mkpkgs)
This commit is contained in:
agc
parent
4b85474b41
commit
00c311bc00
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#! /bin/sh
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# $NetBSD: mkimage,v 1.1 2012/01/15 02:01:02 agc Exp $
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# Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# find next available vnd, from kre
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next_avail ()
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{
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local dev="$1"
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local N=$(( ${#dev} + 1 ))
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local unit units
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units=$(
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sysctl -n hw.disknames |
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tr ' ' '\012' |
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grep '^'"${dev}"'[0-9]' |
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sort -n -k 1.$N )
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test -z "${units}" && {
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test -e "/dev/${dev}0a" || {
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echo >&2 "No ${dev}s available!"
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return 1
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}
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echo "${dev}0"
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return
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}
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N=0
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for unit in ${units}
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do
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if [ "${unit}" = "${dev}${N}" ]
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then
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N=$(( N + 1 ))
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else
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echo "${dev}${N}"
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return
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fi
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done
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test -e /dev/"${dev}${N}a" || {
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echo >&2 "All ${dev}s in use"
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return 1
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}
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echo "${dev}${N}"
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}
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# find the size of the gzipped files in a .tgz archive
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sizeone() {
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case "$1" in
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*.tgz|*.tar.gz)
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tar tvzf "$1" | awk '{ tot += $5 } END { print tot }'
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;;
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*.tbz|*.tar.bz2)
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tar tvjf "$1" | awk '{ tot += $5 } END { print tot }'
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;;
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*)
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echo 0
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;;
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esac
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}
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setsdir=/usr/build/release/i386/binary/sets
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size=0 # in MB
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overhead=8 # in MB
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image=usermode.img
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h=usermode1.$(uname -n)
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sets="base etc modules"
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usermodedirs="/var.run /var.log /etc.cow /root.cow /pkgs"
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specialdirs="/kern /proc"
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bar="==="
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while [ $# -gt 0 ]; do
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case "$1" in
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-S) setsdir=$2; shift ;;
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-h) h=$2; shift ;;
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-s) size=$2; shift ;;
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-x) set -x ;;
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*) break ;;
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esac
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shift
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done
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if [ $# -gt 0 ]; then
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# take the next argument as being the image name
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image="$1"
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shift
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fi
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total=0
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for s in ${sets}; do
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total=$(expr ${total} + $(sizeone ${setsdir}/${s}.tgz))
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done
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total=$(expr \( ${total} / 1000000 \) + ${overhead})
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if [ $size -eq 0 ]; then
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# auto-size the pkgs fs
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size=${total}
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else
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# check that we've been given enough space
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if [ ${total} -gt ${size} ]; then
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echo "File system size given as ${size} MB, but it needs ${total} MB" >&2
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exit 1
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fi
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fi
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echo "${bar} making a new ${size} MB image in ${image} ${bar}"
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dd if=/dev/zero of=${image} bs=1m count=${size}
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vnddev=$(next_avail vnd)
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echo "${bar} mounting image via vnd ${vnddev} ${bar}"
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sudo vnconfig ${vnddev} ${image}
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sudo newfs /dev/r${vnddev}a
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sudo mount /dev/${vnddev}a /mnt
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echo "${bar} installing sets ${bar}"
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(cd /mnt &&
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for s in ${sets}; do
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echo ${s}
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sudo tar xpzf ${setsdir}/${s}.tgz
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done
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)
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echo "${bar} performing customisations ${bar}"
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sudo rm -f /mnt/etc/motd
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tmp=/tmp/usermode.$$
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cat > ${tmp} << EOF
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# NetBSD/usermode /etc/fstab
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/dev/ld0a / ffs ro 1 1
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/dev/ld1a /pkgs ffs ro 1 2
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kernfs /kern kernfs rw
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ptyfs /dev/pts ptyfs rw
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procfs /proc procfs rw
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# mount /root as tmpfs on top of existing dir
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tmpfs /root.cow tmpfs rw,-s2M 0 0
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/root.cow /root union rw,hidden 0 0
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# mount /etc as tmpfs on top of existing dir
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tmpfs /etc.cow tmpfs rw,-s12M 0 0
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/etc.cow /etc union rw,hidden 0 0
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# mount /var/run as tmpfs on top of existing dir
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tmpfs /var.run tmpfs rw,-s1M 0 0
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/var.run /var/run union rw,hidden - -
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# mount /var/log as tmpfs on top of existing dir
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tmpfs /var.log tmpfs rw,-s10M 0 0
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/var.log /var/log union rw,hidden - -
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tmpfs /var/db tmpfs rw,-s8M 0 0
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tmpfs /tmp tmpfs rw,-s32M 0 0
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/dev/cd0a /cdrom cd9660 ro,noauto
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EOF
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sudo mv ${tmp} /mnt/etc/fstab
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cat > ${tmp} << EOF
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# $NetBSD: mkimage,v 1.1 2012/01/15 02:01:02 agc Exp $
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#
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# see rc.conf(5) for more information.
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#
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# Use program=YES to enable program, NO to disable it. program_flags are
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# passed to the program on the command line.
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#
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# Load the defaults in from /etc/defaults/rc.conf (if it's readable).
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# These can be overridden below.
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#
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if [ -r /etc/defaults/rc.conf ]; then
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. /etc/defaults/rc.conf
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fi
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# If this is not set to YES, the system will drop into single-user mode.
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#
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rc_configured=YES
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# make sure we have the right rw filesystem at boot
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critical_filesystems_local="/var/db /var.run /var/run /var.log /var/log /etc.cow /etc /root.cow /root"
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# Add local overrides below
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#
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dhcpcd=YES
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sshd=YES
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hostname=${h}
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EOF
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sudo mv ${tmp} /mnt/etc/rc.conf
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echo "${bar} making extra directories ${bar}"
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for d in ${usermodedirs}; do
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sudo mkdir -p /mnt/${d}
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done
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for d in ${specialdirs}; do
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sudo mkdir -p /mnt/${d}
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done
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echo "${bar} customising /var/tmp ${bar}"
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sudo rm -rf /mnt/var/tmp
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(cd /mnt/var && sudo ln -s /tmp tmp)
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# package-related stuff
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(cat /mnt/etc/csh.cshrc;echo "setenv PKG_DBDIR /usr/pkg/.dbdir") > ${tmp}
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sudo mv ${tmp} /mnt/etc/csh.cshrc
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(cat /mnt/etc/profile;echo "export PKG_DBDIR=/usr/pkg/.dbdir") > ${tmp}
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sudo mv ${tmp} /mnt/etc/profile
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(echo "PKG_DBDIR=/usr/pkg/.dbdir") > ${tmp}
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sudo mv ${tmp} /mnt/etc/mk.conf
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(cd /mnt/usr && sudo ln -s /pkgs/usr/pkg pkg)
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df /mnt
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sudo umount /mnt
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sudo vnconfig -u ${vnddev}
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exit 0
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@ -0,0 +1,147 @@
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#! /bin/sh
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# $NetBSD: mkpkgs,v 1.1 2012/01/15 02:01:02 agc Exp $
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# Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# find next available vnd device, from kre
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next_avail ()
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{
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local dev="$1"
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local N=$(( ${#dev} + 1 ))
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local unit units
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units=$(
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sysctl -n hw.disknames |
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tr ' ' '\012' |
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grep '^'"${dev}"'[0-9]' |
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sort -n -k 1.$N )
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test -z "${units}" && {
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test -e "/dev/${dev}0a" || {
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echo >&2 "No ${dev}s available!"
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return 1
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}
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echo "${dev}0"
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return
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}
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N=0
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for unit in ${units}
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do
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if [ "${unit}" = "${dev}${N}" ]
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then
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N=$(( N + 1 ))
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else
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echo "${dev}${N}"
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return
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fi
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done
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test -e /dev/"${dev}${N}a" || {
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echo >&2 "All ${dev}s in use"
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return 1
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}
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echo "${dev}${N}"
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}
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# find the size of the gzipped files in a .tgz archive
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sizeone() {
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case "$1" in
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*.tgz|*.tar.gz)
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tar tvzf "$1" | awk '{ tot += $5 } END { print tot }'
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;;
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*.tbz|*.tar.bz2)
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tar tvjf "$1" | awk '{ tot += $5 } END { print tot }'
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;;
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*)
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echo 0
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;;
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esac
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}
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pkgdir=/usr/pkgsrc/packages/All
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size=0 # in MB
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image=pkgs.img
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pkgs="digest screen sudo"
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bar="==="
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while [ $# -gt 0 ]; do
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case "$1" in
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-S) pkgdir=$2; shift ;;
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-o) image=$2; shift ;;
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-s) size=$2; shift ;;
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-x) set -x ;;
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*) break ;;
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esac
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shift
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done
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while [ $# -gt 0 ]; do
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# take the next argument as being the image name
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pkgs="${pkgs} $1"
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shift
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done
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# find the size of the fs needed
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total=0
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for p in ${pkgs}; do
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total=$(expr $total + $(sizeone ${pkgdir}/${p}-*.tgz))
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done
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total=$(expr \( $total / 1000000 \) + 2)
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if [ $size -eq 0 ]; then
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# auto-size the pkgs fs
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size=${total}
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else
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# check that we've been given enough space
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if [ ${total} -gt ${size} ]; then
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echo "File system size given as ${size} MB, but it needs ${total} MB" >&2
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exit 1
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fi
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fi
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echo "${bar} making a new ${size} MB image in ${image} ${bar}"
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dd if=/dev/zero of=${image} bs=1m count=${size}
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vnddev=$(next_avail vnd)
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echo "${bar} mounting image via vnd ${vnddev} ${bar}"
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sudo vnconfig ${vnddev} ${image}
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sudo newfs /dev/r${vnddev}a
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sudo mount /dev/${vnddev}a /mnt
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echo "${bar} installing packages ${bar}"
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sudo mkdir -p /mnt/usr/pkg/.dbdir
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for p in ${pkgs}; do
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echo "${bar} Installing ${p} ${bar}"
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sudo pkg_add -K /usr/pkg/.dbdir -P /mnt -v ${pkgdir}/${p}-*.tgz
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done
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df /mnt
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sudo umount /mnt
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sudo vnconfig -u ${vnddev}
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exit 0
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@ -0,0 +1,65 @@
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#! /bin/sh
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# $NetBSD: usermode,v 1.1 2012/01/15 02:01:02 agc Exp $
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# Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
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||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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image=usermode.img
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pkgs=pkgs.img
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while [ $# -gt 0 ]; do
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case "$1" in
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-v) set -x ;;
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*) break ;;
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esac
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shift
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done
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if [ $# -gt 0 ]; then
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image=$1
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fi
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# check bridging is set up
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bridging=$(ifconfig tap0 | awk '$1 == "inet" { print $2 }')
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case "${bridging}" in
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*.*.*.*) echo "bridging is already up on ${bridging}" ;;
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*) interface=$(ifconfig -l | awk '{print $1}')
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sudo ifconfig tap0 create up
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sudo ifconfig bridge0 create
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sudo brconfig bridge0 add tap0 add ${interface} up
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sudo chmod 664 /dev/tap*
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;;
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esac
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# check syscall emulation module is loaded
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mod=$(modstat syscallemu | awk '$1 == "syscallemu" { print; exit }')
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case "${mod}" in
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syscallemu*) echo "Host syscall emulation module loaded" ;;
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*) sudo modload syscallemu ;;
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esac
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./netbsd disk=${image} disk=${pkgs} net=tap0,00:00:de:ad:be:ef
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exit 0
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Reference in New Issue