#!/bin/bash
################################################################################
# Mknfsinitrd Creates an initial ramdisk image for NFS boot
# T.Barnaby, BEAM Ltd, 14/2/04
# Some functions taken from /sbin/mkinitrd
################################################################################
#
modulesPreload="nfs e1000e igb fscache"
busyboxProgs="[ ash awk basename bunzip2 bzcat cat chgrp chmod\
chown chroot chvt clear cmp cp cut date dd deallocvt\
df dirname dmesg du echo egrep env expr false fgrep\
find free grep gunzip gzip halt head hexdump hostid hostname\
id ifconfig init insmod install ipaddr kill killall klogd\
linuxrc ln logger ls lsmod mkdir mknod mkswap mktemp\
modprobe more mount mv openvt pidof ping pivot_root poweroff\
ps pwd readlink reboot reset rm rmdir rmmod route sed\
sh sleep sort strings swapoff swapon sync syslogd tail\
tar tee test time touch tr true tty udhcpc umount uname uniq\
unzip uptime usleep vi wc wget which whoami xargs yes\
zcat stat switch_root"
baseDir=""
kernelVersion=""
modules=""
verbose="-v"
target=""
builtins=""
##############################################################################
# Script files
##############################################################################
#
fileInit(){
cat <<"EOF"
#!/bin/sh
################################################################################
# Init.rc Diskless NFS boot init script
# T.Barnaby, BEAM Ltd, 16/2/05
################################################################################
#
modules="mii pps_core e1000e i2c-core i2c-algo-bit dca igb sunrpc auth_rpcgss nfs_acl fscache lockd nfs"
echo "BEAM Diskless boot starting ..."
#mount -n -o remount,rw /
mount -n -t proc /proc /proc
mount -n -t sysfs none /sys
mount -n -t tmpfs /dev/shm /tmp
#/bin/sh
echo "Loading modules"
for m in $modules; do
insmod /lib/$m.ko
done
#/bin/sh
echo "Seting up network interface"
while true; do
if udhcpc -s /dhcpConfig -f -n -q -i eth0; then break; fi
if udhcpc -s /dhcpConfig -f -n -q -i eth1; then break; fi
done
. /tmp/dhcpInfo
if [ -n "$dhcp_hostname" ]; then
hostname $dhcp_hostname
fi
#/bin/sh
echo "Mounting root filesystem"
mount -n -t rpc_pipefs sunrpc /var/lib/nfs/rpc_pipefs
mount -n -r -t nfs -o async,nolock $dhcp_rootpath /sysroot
#/bin/sh
echo "Switching to new root"
echo 0x100 > /proc/sys/kernel/real-root-dev
umount /var/lib/nfs/rpc_pipefs
umount /sys
umount /proc
umount /tmp
echo "Doing switch_root"
exec switch_root /sysroot /sbin/init
#exec switch_root /sysroot /bin/sh
EOF
}
fileDhcpConfig(){
cat <<"EOF"
#!/bin/sh
################################################################################
# dhcpConfig Sets up network interface
# T.Barnaby, BEAM Ltd, 16/2/05
################################################################################
#
configureNetwork(){
ifconfig $interface $ip
if [ -n "$router" ]; then
route add default gw $router
fi
echo "dhcp_interface=$interface" > /tmp/dhcpInfo
echo "dhcp_ip=$ip" >> /tmp/dhcpInfo
echo "dhcp_mask=$mask" >> /tmp/dhcpInfo
echo "dhcp_subnet=$subnet" >> /tmp/dhcpInfo
echo "dhcp_broadcast=$broadcast" >> /tmp/dhcpInfo
echo "dhcp_router=$router" >> /tmp/dhcpInfo
echo "dhcp_dns=$dns" >> /tmp/dhcpInfo
echo "dhcp_namesvr=$namesvr" >> /tmp/dhcpInfo
echo "dhcp_hostname=$hostname" >> /tmp/dhcpInfo
echo "dhcp_domain=$domain" >> /tmp/dhcpInfo
echo "dhcp_siaddr=$siaddr" >> /tmp/dhcpInfo
echo "dhcp_rootpath=$rootpath" >> /tmp/dhcpInfo
echo "dhcp_timesvr=$timesvr" >> /tmp/dhcpInfo
echo "dhcp_ntpsrv=$ntpsrv" >> /tmp/dhcpInfo
echo "dhcp_tftp=$tftp" >> /tmp/dhcpInfo
echo "dhcp_timezone=$timezone" >> /tmp/dhcpInfo
echo "dhcp_logsvr=$logsvr" >> /tmp/dhcpInfo
echo "dhcp_swapsvr=$swapsvr" >> /tmp/dhcpInfo
}
case $1 in
deconfig) ifconfig $interface 0.0.0.0;;
bound) configureNetwork;;
esac
exit 0
EOF
}
##############################################################################
# Functions
##############################################################################
#
moduledep() {
if [ ! -f "$baseDir/lib/modules/$kernelVersion/modules.dep" ]; then
echo "No dep file found for kernel $kernelVersion" >&2
exit 1
fi
[ -n "$verbose" ] && echo -n "Looking for deps of module $1"
deps=$(awk 'BEGIN { searched=ARGV[2]; ARGV[2]=""; rc=1 } \
function modname(filename) { match(filename, /([^\/]+)\.k?o:?$/, ret); return ret[1] } \
function show() { if (orig == searched) { print dep; orig=""; rc=0; exit } } \
/^.*/ { show(); \
orig=modname($1); dep=""; \
if ($2) { for (i = 2; i <= NF; i++) { dep=sprintf("%s %s", dep, modname($i)); } } } \
/^ / { dep=sprintf("%s %s", dep, modname($1)); } \
END { show(); exit(rc) }' $baseDir/lib/modules/$kernelVersion/modules.dep $1)
[ -n "$verbose" ] && echo -e "\t$deps"
}
findmodule() {
skiperrors=""
echo "FindModule: $1"
if [ $1 == "--skiperrors" ]; then
skiperrors=--skiperrors
shift
fi
local modName=$1
if [ "$modName" = "off" -o "$modName" = "null" ]; then
return
fi
if [ $(echo $modName | cut -b1) = "-" ]; then
skiperrors=--skiperrors
modName=$(echo $modName | cut -b2-)
fi
if echo $builtins | egrep -q '(^| )'$modName'( |$)' ; then
[ -n "$verbose" ] && echo "module $modName assumed to be built in"
set +x
return
fi
# special cases
if [ "$modName" = "i2o_block" ]; then
findmodule i2o_core
findmodule -i2o_pci
modName="i2o_block"
elif [ "$modName" = "ppa" ]; then
findmodule parport
findmodule parport_pc
modName="ppa"
elif [ "$modName" = "sbp2" ]; then
findmodule ieee1394
findmodule ohci1394
modName="sbp2"
elif [ "$modName" = "igb" ]; then
findmodule pps_core
findmodule i2c-core
findmodule i2c-algo-bit
findmodule dca
modName="igb"
else
moduledep $modName
for i in $deps; do
findmodule $i
done
fi
for modExt in o.gz o ko ; do
if [ -d $baseDir/lib/modules/$kernelVersion/updates ]; then
fmPath=`(cd $baseDir/lib/modules/$kernelVersion/updates; echo find . -name $modName.$modExt -type f | /bin/awk {'print $1; exit;'}`
fi
if [ -f $baseDir/lib/modules/$kernelVersion/updates/$fmPath ]; then
fmPath=updates/$fmPath
break
fi
fmPath=`(cd $baseDir/lib/modules/$kernelVersion; find . -name $modName.$modExt -type f) | /bin/awk {'print $1; exit;'}`
if [ -f $baseDir/lib/modules/$kernelVersion/$fmPath ]; then
break
fi
done
if [ ! -f $baseDir/lib/modules/$kernelVersion/$fmPath ]; then
if [ -n "$skiperrors" ]; then
return
fi
# ignore the absence of the scsi modules
for n in $PRESCSIMODS; do
if [ "$n" = "$modName" ]; then
return;
fi
done;
if [ -n "$allowmissing" ]; then
echo "WARNING: No module $modName found for kernel $kernelVersion, continuing anyway" >&2
return
fi
echo "No module $modName found for kernel $kernelVersion, aborting." >&2
exit 1
fi
# only need to add each module once
if ! echo $modules | grep -q "$fmPath" 2>/dev/null ; then
modules="$modules $fmPath"
fi
}
inst() {
if [ "$#" != "2" ];then
echo "usage: inst <file> <destination>"
return
fi
[ -n "$verbose" ] && echo "cp $1 -> $2"
cp $1 $2
}
usage () {
echo "usage: `basename $0` [-v][-d baseDir] <initrd-image> <kernel-version>" >&2
echo "" >&2
echo " (ex: `basename $0` initrd-2.6.10-1.760_FC3 2.6.10-1.760_FC3)" >&2
exit 1
}
##############################################################################
# Main code
##############################################################################
#
while [ $# -gt 0 ]; do
case $1 in
-v)
verbose=-v
;;
-d)
shift
baseDir=$1
;;
*)
if [ -z "$target" ]; then
target=$1
elif [ -z "$kernelVersion" ]; then
kernelVersion=$1
else
usage
fi
;;
esac
shift
done
echo "BaseDir: $baseDir";
if [ -z "$target" -o -z "$kernelVersion" ]; then
usage
fi
if [ ! -d $baseDir/lib/modules/$kernelVersion ]; then
echo "$baseDir/lib/modules/$kernelVersion is not a directory." >&2
exit 1
fi
if false; then
if [ $UID != 0 ]; then
echo "mknfsinitrd must be run as root"
exit 1
fi
fi
# find a temporary directory which doesn't use tmpfs
TMPDIR=""
for t in /tmp /var/tmp /root ${PWD}; do
if [ ! -d $t ]; then continue; fi
if ! echo access -w $t; then continue; fi
fs=$(df -T $t 2>/dev/null | awk '{line=$1;} END {printf $2;}')
if [ "$fs" != "tmpfs" ]; then
TMPDIR=$t
break
fi
done
if [ -z "$TMPDIR" ]; then
echo "no temporary directory could be found" >&2
exit 1
fi
if [ $TMPDIR = "/root" -o $TMPDIR = "${PWD}" ]; then
echo "WARNING: using $TMPDIR for temporary files" >&2
fi
# Add preload modules
for n in $modulesPreload; do
findmodule $n
done
if [ -n "$verbose" ]; then
echo "Using modules: $modules"
fi
#echo "TMPDIR: $TMPDIR"
#exit 0
##############################################################################
# Main wor
##############################################################################
#
MNTIMAGE=`mktemp -d ${TMPDIR}/initrd.XXXXXX`
IMAGE=`mktemp ${TMPDIR}/initrd.img.XXXXXX`
#MNTIMAGE=/tmp/initrd
if [ -z "$MNTIMAGE" -o -z "$IMAGE" ]; then
echo "Error creating temporaries. Try again" >&2
exit 1
fi
echo "MNTIMAGE: $MNTIMAGE"
mkdir -p $MNTIMAGE
mkdir -p $MNTIMAGE/lib
mkdir -p $MNTIMAGE/bin
mkdir -p $MNTIMAGE/etc
mkdir -p $MNTIMAGE/dev
mkdir -p $MNTIMAGE/proc
mkdir -p $MNTIMAGE/sys
mkdir -p $MNTIMAGE/sysroot
mkdir -p $MNTIMAGE/usr
mkdir -p $MNTIMAGE/usr/bin
mkdir -p $MNTIMAGE/usr/sbin
mkdir -p $MNTIMAGE/var
mkdir -p $MNTIMAGE/var/lib/nfs/rpc_pipefs
mkdir -p $MNTIMAGE/tmp
rm -f $MNTIMAGE/sbin
ln -s bin $MNTIMAGE/sbin
# Install needed programs
#inst /sbin/nash "$MNTIMAGE/bin/nash"
#inst /sbin/insmod.static "$MNTIMAGE/bin/insmod"
#ln -s /sbin/nash $MNTIMAGE/sbin/modprobe
#inst /bin/bash $MNTIMAGE/bin
#ln -s bash $MNTIMAGE/bin/sh
# Test progs
if false; then
# Install libs
inst /lib/libtermcap.so.2 $MNTIMAGE/lib
inst /lib/libdl.so.2 $MNTIMAGE/lib
inst /lib/libc.so.6 $MNTIMAGE/lib
inst /lib/ld-linux.so.2 $MNTIMAGE/lib
#inst /sbin/ifconfig $MNTIMAGE/bin/ifconfig1
#inst /bin/dmesg $MNTIMAGE/bin
inst /usr/bin/strace $MNTIMAGE/bin
#inst /sbin/lsmod $MNTIMAGE/bin
fi
# Install busybox
inst /sbin/busybox-beam $MNTIMAGE/bin/busybox
for p in $busyboxProgs; do
ln -sf busybox $MNTIMAGE/bin/$p
done
# Copy modules
for m in $modules; do
echo "Copy kernel module: $m"
if [ -x /usr/bin/strip ]; then
/usr/bin/strip -g $baseDir/lib/modules/$kernelVersion/$m -o $MNTIMAGE/lib/$(basename $m)
else
cp -a $baseDir/lib/modules/$kernelVersion/$m $MNTIMAGE/lib
fi
done
if false; then
# Create main devices
mknod $MNTIMAGE/dev/console c 5 1
mknod $MNTIMAGE/dev/null c 1 3
mknod $MNTIMAGE/dev/ram b 1 1
mknod $MNTIMAGE/dev/urandom c 1 9
mknod $MNTIMAGE/dev/systty c 4 0
mknod $MNTIMAGE/dev/tty c 5 0
for i in 1 2 3 4; do
mknod $MNTIMAGE/dev/tty$i c 4 $i
done
fi
#touch $MNTIMAGE/etc/fstab
# Setup udev
#inst /sbin/udev.static $MNTIMAGE/sbin/udev
#ln -s udev $MNTIMAGE/sbin/udevstart
#mkdir -p $MNTIMAGE/etc/udev
#inst /etc/udev/udev.conf $MNTIMAGE/etc/udev/udev.conf
#ln -s /sbin/nash $MNTIMAGE/sbin/hotplug
# Create rc script filea
fileInit > $MNTIMAGE/init
fileDhcpConfig > $MNTIMAGE/dhcpConfig
chmod +x $MNTIMAGE/init
chmod +x $MNTIMAGE/dhcpConfig
(cd $MNTIMAGE; find . | cpio --quiet -c -o) > $IMAGE
gzip -9 < $IMAGE > $target || rc=1
rm -rf $MNTIMAGE $IMAGE
exit 0
