Date: Wed, 10 Mar 2004 00:16:37 +0100 From: Poul-Henning Kamp <phk@phk.freebsd.dk> To: current@freebsd.org, small@freebsd.org Subject: "nanobsd" prototype Message-ID: <36090.1078874197@critter.freebsd.dk>
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This patch contains my "nanobsd" prototype which I have been mumbling
about.
What this does is build a CF friendly image with three slices, two
"image" slices and an "etc" slice.
The two image slices can be booted as read-only root filesystems
and when one is used, the other can be updated with a new image.
Boot0 is used so you can select which of the two you want to boot
from.
If you update the image in slice2 you need to change /etc/fstab
to match (sed -i "" -e s/ad0s1/ad0s2/ /mnt/etc/fstab)
The etc slice (ad0s3) is where all the machine specific files
for /etc should go.
To try this out you need a -current system which has the
etc/rc.d/initdiskless commit I made a minute ago and then:
mkdir /usr/src/nanobsd
cd /usr/src/nanobsd
patch < this_file
# possibly edit Makefile and make.conf
make obj
make
dd if=/usr/obj/`pwd`/_.i of=/dev/$CFDEVICE bs=64k
mount /dev/${CFDEVICE}s3 /mnt
cp /the/stuff/I/want/in/etc/* /mnt
umount /mnt
# move CF device to embedded platform and try it.
Feedback of all sorts most welcome! And more documentation
to arrive as it gets written.
Poul-Henning
--- /dev/null Wed Mar 10 00:02:50 2004
+++ Makefile Tue Mar 9 23:54:53 2004
@@ -0,0 +1,121 @@
+# $FreeBSD$
+
+MAKEJ="-j12"
+
+HD=16
+SC=32
+SECTS=501760
+DATASLICE=2048
+
+KERNCONF?= GENERIC
+WORLDDIR?= ${.CURDIR}/..
+WD?= ${.OBJDIR}/_.w
+
+all: buildworld installworld buildimage
+
+
+#
+# This is where you customizations to the image can be performed
+# Please make sure to do everything relative to ${WD} here.
+#
+Customize: _.cs
+_.cs: _.iw _.di _.ik _.di
+ echo "/dev/ad0s1a / ufs ro 1 1" > ${WD}/etc/fstab
+ sed -i "" -e /beastie/d ${WD}/boot/loader.rc
+ sed -i "" -e /ttyd0/s/off/on/ ${WD}/etc/ttys
+ echo " -h" > ${WD}/boot.config
+ touch _.cs
+
+###########################################################################
+#
+# The rest is pretty (or ugly if you prefer) magic, and should generally
+# not need to be fiddled with. Good luck if you need to venture past this
+# point.
+#
+
+# Run a buildworld with our private make.conf
+buildworld: _.bw
+_.bw:
+ (cd ${WORLDDIR} && \
+ make ${MAKEJ} -s buildworld __MAKE_CONF=${.CURDIR}/make.conf \
+ ) > _.bw.tmp 2>&1
+ mv _.bw.tmp _.bw
+
+# Run installworld and install into our object directory
+installworld: _.iw
+_.iw: _.bw
+ -rm -rf ${WD} > /dev/null 2>&1
+ -chflags -R noschg ${WD} > /dev/null 2>&1
+ rm -rf ${WD}
+ mkdir -p ${WD}
+ (cd ${WORLDDIR} && \
+ make ${MAKEJ} -s installworld \
+ DESTDIR=${WD} \
+ __MAKE_CONF=${.CURDIR}/make.conf \
+ ) > _.iw.tmp 2>&1
+ mv _.iw.tmp _.iw
+
+# Run distribution target in /etc.
+_.di: _.iw
+ mkdir -p ${WD}
+ (cd ${WORLDDIR}/etc && \
+ make ${MAKEJ} -s distribution \
+ DESTDIR=${WD} \
+ __MAKE_CONF=${.CURDIR}/make.conf \
+ ) > _.di.tmp 2>&1
+ mv _.di.tmp _.di
+
+# Build kernel
+_.bk: ${WORLDDIR}/sys/i386/conf/${KERNCONF}
+ (cd ${WORLDDIR} && \
+ make ${MAKEJ} -s buildkernel \
+ KERNCONF=${KERNCONF} \
+ __MAKE_CONF=${.CURDIR}/make.conf \
+ ) > _.bk.tmp 2>&1
+ mv _.bk.tmp _.bk
+
+# Install kernel and hints file
+_.ik: _.bk _.di
+ cp ${WORLDDIR}/sys/i386/conf/GENERIC.hints ${WD}/boot/device.hints
+ (cd ${WORLDDIR} && \
+ make ${MAKEJ} installkernel \
+ KERNCONF=${KERNCONF} \
+ DESTDIR=${WD} \
+ __MAKE_CONF=${.CURDIR}/make.conf \
+ ) > _.ik.tmp 2>&1
+ mv _.ik.tmp _.ik
+
+
+# Create a disk image from the installed image
+buildimage: _.md
+_.md: _.cs
+ -umount ${WD}/dev > /dev/null 2>&1
+ chflags -R noschg ${WD} > /dev/null 2>&1
+ rm -rf ${WD}/var/* ${WD}/dev/* ${WD}/tmp
+ # create trigger file for etc/rc.d/initdiskless
+ touch ${WD}/etc/diskless
+ mkdir -p ${WD}/conf/base/var
+ mtree -deU -f ${WD}/etc/mtree/BSD.var.dist -p ${WD}/conf/base/var
+ mkdir -p ${WD}/conf/base/etc
+ ( cd ${WD}/etc && find . -print | cpio -dumpl ../conf/base/etc )
+ mkdir -p ${WD}/conf/default/etc
+ echo "mount -o ro /dev/ad0s3" > ${WD}/conf/default/etc/remount
+ ln -s var/tmp ${WD}/tmp
+ mtree -deU -f ${WD}/etc/mtree/BSD.root.dist -p ${WD}/
+ mtree -deU -f ${WD}/etc/mtree/BSD.usr.dist -p ${WD}/usr
+ mtree -deU -f ${WD}/etc/mtree/BSD.include.dist -p ${WD}/usr/include
+.if exists(${WD}/etc/mtree/BSD.sendmail.dist)
+ mtree -deU -f ${WD}/etc/mtree/BSD.sendmail.dist -p ${WD}/
+.endif
+ (cd ${WD} && mtree -c -Kmd5digest ) > _.mtree.tmp
+ ${.CURDIR}/i386.diskimage \
+ ${SECTS} \
+ ${HD} \
+ ${SC} \
+ ${DATASLICE} \
+ ${WD} ${.OBJDIR}/_.i \
+ > _.md.tmp 2>&1
+ mv _.mtree.tmp _.mtree
+ mv _.md.tmp _.md
+
+.include <bsd.obj.mk>
--- /dev/null Wed Mar 10 00:02:50 2004
+++ i386.diskimage Tue Mar 9 22:52:49 2004
@@ -0,0 +1,31 @@
+#!/bin/sh
+# ${.CURDIR}/i386.diskimage $SECTS $HD $SC $DATASLICE ${.OBJDIR}/_.w ${.OBJDIR}/_.i
+# XXX: newfs params.
+
+set -ex
+
+dd if=/dev/zero of=/tmp/$$.d count=$1
+MD=`mdconfig -a -t vnode -f /tmp/$$.d -x $3 -y $2`
+rm -f /tmp/$$.d
+(
+sl=`expr "(" $1 - $3 - $4 ")" / 2`
+echo p 1 165 $3 $sl
+echo p 2 165 `expr $3 + $sl` $sl
+echo p 3 165 `expr $3 + $sl + $sl` $4
+) > /tmp/$$
+cat /tmp/$$
+fdisk -i -f /tmp/$$ $MD
+fdisk $MD
+boot0cfg -B -b /boot/boot0sio -s 1 -m 3 $MD
+rm -f /tmp/$$
+bsdlabel -w -B ${MD}s1
+newfs -O1 -U ${MD}s1a
+newfs -O1 -U ${MD}s3
+mount /dev/${MD}s1a /mnt
+(cd $5 && find . -print | cpio -dump /mnt) || true
+df /mnt
+umount /mnt
+dd if=/dev/${MD}s1 of=/dev/${MD}s2 bs=64k
+dd if=/dev/${MD} of=$6 bs=64k
+dd if=/dev/${MD}s1 of=${6}.s1 bs=64k
+mdconfig -d -u ${MD}
--- /dev/null Wed Mar 10 00:02:50 2004
+++ make.conf Tue Mar 9 22:50:34 2004
@@ -0,0 +1,31 @@
+NO_SENDMAIL=yes
+NO_KERBEROS=yes
+NO_IPFILTER=yes
+NO_LPR=yes
+NO_I4B=yes
+NO_CXX=yes
+NO_FORTRAN=yes
+NO_OBJC=yes
+NOHTML=yes
+NO_GDB=yes
+NO_GCOV=yes
+NOINET6=yes
+NORADIUS=yes
+NOPROFILE=yes
+NOLIBPTHREAD=yes
+NOLIBTHR=yes
+#NO_YP_LIBC=yes
+NO_HESIOD_LIBC=yes
+NO_SHAREDOCS=yes
+NO_CVS=yes
+NOMAN=yes
+NOATM=yes
+NO_USB=yes
+NO_VINUM=yes
+NO_TOOLCHAIN=yes
+NO_ACPI=yes
+NO_RESCUE=yes
+NOGAMES=yes
+NOINFO=yes
+NO_MODULES=yes
+NO_PF=YES
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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