#!/bin/sh # Description: main script for new type of initial ramdisk for # linux diskless clients version 4 # # Author(s): Dirk von Suchodoletz , 12-04-2006 # # Copyright: (c) 2006 - RZ Universitaet Freiburg # # Version: 0.2.4e # functions common for all distros, messages contains all error and info # output . /etc/messages . /etc/functions || ( echo -e $init_mff && exit 1 ) . /etc/distro-functions || ( echo -e $init_dff && exit 1 ) # configuration settings (several file and directory variables) . /etc/sysconfig/config || ( echo -e $init_dscf && exit 1 ) export PATH=/bin:/sbin:/usr/bin/:/usr/sbin export date="@@@DATE@@@" export DEBUGLEVEL=0 export KERNEL="@@@KERNVER@@@" export NWMODULES="@@@NWMODULES@@@" export DISTRO="@@@DISTRO@@@" # do not use dnbd cache file nodnbdcache="yes" DEVDIR="/dev" mount -n -t tmpfs -o 'size=25%,mode=0755' initramfsdevs ${DEVDIR} cp -a /tmp/null /tmp/console /dev mkdir -p ${DEVDIR}/pts mkdir -p ${DEVDIR}/shm mkdir -p ${DEVDIR}/.udevdb [ ! -f /proc/cpuinfo ] && mount -n -t proc proc /proc echo 256 > /proc/sys/kernel/real-root-dev [ ! -d /sys/class ] && mount -n -t sysfs sysfs /sys # redirect console (after /dev/console is available, and /dev mounted) exec < /dev/console > /dev/console 2>&1 # run pre init script preinit [ -x /bin/vendor_preinit ] && /bin/vendor_preinit # start device auto discovery service - distro specific function udev_hotplug # set defaults and create waitfor files TMPFSSIZE="50%" COWSIZE="50%" RWDIR=/dev/shm echo "noldap" > /tmp/ldap-done echo "nodhcp" > /tmp/dhcp-done echo "nofile" > /tmp/file-done # read kernel commandline read KCMDLINE < /proc/cmdline export KCMDLINE for opts in ${KCMDLINE} ; do case ${opts} in # localization country=*) COUNTRY=${opts#country=} echo -e "\n# localization information gotten via kernel command line \ in $0\ncountry=\"${COUNTRY}\"" >> /etc/machine-setup ;; # single token for debugging debug) DEBUGLEVEL=1;; # debug level debug=*) DEBUGLEVEL=${opts#debug=};; # if configuration should be gathered by dhcp client dhcp) DHCP="yes" rm /tmp/dhcp-done;; # if ldap configuration should be triggered ldap) LDAP="yes" rm /tmp/ldap-done;; # ldap configuration with host and port to contact (base) ldap*) LDAP="yes" rm /tmp/ldap-done;; # if (external, via tftp) configuration file retrieval should # be triggered, if no source is given try dhcp server and # predefined standard path file) FILE="yes" rm /tmp/file-done;; # file source with tftp server and file location on the server file*) FILE="yes" FILESRC=${opts#file=} rm /tmp/file-done;; # if ld.so.cache should not be generated noldsc) NOLDSC=yes;; # additional source to unify root filesystem with union=*) UNIONFS=1 UNIONDIRS=${opts#union=};; # if unionfs should be used unionfs) UNIONFS=1;; # if cowloop should be used, only ontop of network block device and in # combination with classical fs, like ext2 useful cowloop*) COWLOOP=1 #COWSIZE=${opts#cowloop=} ;; # dnbd server:port dnbdroot=*) NBD=dnbd # name of kernel module NBDOPT=${opts#dnbdroot=};; dcsize=*) # size of cache dnbd should use within ram DNBDCACHESIZE=${opts#dcsize=};; # nbd server:port,filesystem (filesystem is optional) nbdroot=*) NBD=nbd # name of kernel module NBDOPT=${opts#nbdroot=};; # ip configuration client-ip:server-ip:gateway:netmask ip=*) IPINFO=${opts#ip=};; # nfs server and path nfsroot=*) NFSROOT=${opts#nfsroot=} echo -e "\n# nfs root information gotten via kernel command line in $0\n\ nfsroot=\"${NFSROOT}\"\n" >> /etc/machine-setup ;; # size of tempfs if not max. 50% of RAM should be used tmpfssize=*) TMPFSSIZE=${opts#tmpfssize=};; # vendor code identifier for dhcp requests vci=*) VCI=${opts#vci=};; esac done # load block device driver if needed if [ -n "${NBD}" ] ; then modprobe ${MODPRV} ${NBD} || error "$init_errnbd" fi # check if at least one type of IP configuration is availabe if [ -z "$DHCP" -a -z "$LDAP" -a -z "$IPINFO" ] ; then echo -e "# You did not specify any advanced configuration mode for your \ clients. You\nmight want to add the token 'dhcp' for DHCP configuration, \ 'file(=source)'\nfor config file get via TFTP or 'ldap(=source)' for LDAP \ configuration to\nyour kernel command line." >> /etc/machine-setup if strinfile "clientip" /etc/machine-setup ; then # IP configuration seems to be present in machine-setup file . /etc/machine-setup IPINFO="ip=$clientip:$serverip:$gateway:$subnet_mask" else error "$init_errip" fi fi # for ldap configuration at least basic IP setup is needed to contact the # server [ -z "$DHCP" -a -n "$LDAP" -a -z "$IPINFO" ] && error "$init_errldap" # set debug level and logfile echo "Setting debuglevel to ${DEBUGLEVEL}" export MODPRV=" " export LOGFILE if [ "${DEBUGLEVEL}" -gt 0 ] ; then # if LOGFILE should be used within initial ramdisk add '/mnt' in front # of the variable LOGFILE="/var/log/dxs-boot.log" echo "1 4 1 7" >/proc/sys/kernel/printk [ "${DEBUGLEVEL}" -ge 2 ] && MODPRV="-v" [ "${DEBUGLEVEL}" -gt 3 ] && { set -x # and the kernel too echo "7 7 7 7" >/proc/sys/kernel/printk; } else # switch off most of kernel debug output echo "0 0 0 0" >/proc/sys/kernel/printk # modprobe should stay quiet MODPRV="-q" LOGFILE="/dev/null" fi # load network adaptor modules modprobe ${MODPRV} -a ${NWMODULES} || error "$init_errnwad" # set up loopback networking (ipsetup - function defined in /etc/functions) ipsetup 127.0.0.1 255.0.0.0 0.0.0.0 127.255.255.255 lo # analyze ip information from the kernel command line and put parts # of it into several variables if [ -n "$IPINFO" ] ; then getip () { val=$IPINFO; i=$(expr $1 - 1); while [ $i -gt 0 ] ; do val=${val#*:} ; i=$(expr $i - 1); done; echo $val|sed "s/:.*//"; } IP=$(getip 1) SERVER=$(getip 2) GW=$(getip 3) NM=$(getip 4) echo -e "# ip configuration written by $0 script\nclientip=$IP\n\ sub_netmask=$NM\ngateway=$GW\nserverip=$SERVER" \ >>/etc/machine-setup # set static ip address via function ipsetup ipsetup $IP $NM $GW 255.255.255.255 eth0 else noipyet="yes" fi # get configuration data via dhcp (with vendor code identifier if present # in ${VCI} (from kernel command line) ... [ -n "$DHCP" ] && rundhcp ${VCI} & if [ -n "$noipyet" ] ; then waitfor /tmp/dhcp-done 20000 . /etc/machine-setup [ -z "$clientip" -o -z "$subnet_mask" -o -z "$gateway" \ -o -z "$broadcast_address" ] && error "$init_errdhcp" ipsetup $clientip $subnet_mask $gateway $broadcast_address eth0 fi # ... or ldap if available (in background) [ -n "$LDAP" ] && ldapconf & # ... or via tftp file get (in background) [ -n "$FILE" ] && fileget & # if root filesystem should be imported via (d) network block device if [ -n "${NBD}" ] ; then nbdhost=${NBDOPT%:*} nbdopt=${NBDOPT#*:} nbdport=${nbdopt%,*} nbdfs=${nbdopt#$nbdport*} if [ -z "$nbdfs" ]; then RFST=ext2; else RFST=${nbdfs#*,}; fi echo "Diskless client using ${NBD} on $nbdhost:$nbdport with $RFST" # fixme: check for fs in /proc/filesystems before trying to load the module modprobe ${MODPRV} ${RFST} || error "$init_errnbd" nonfatal case "${NBD}" in # network block device present in standard kernel nbd) RDEV=/dev/nbd0 waitfor "${RDEV}" 30000 || error "$init_nbddev" echo "0" > /sys/block/nbd0/queue/read_ahead_kb nbd-client $nbdhost $nbdport ${RDEV} || error "$init_nbdcl" # switch off unneeded block read ahead echo "0" > /sys/block/nbd0/queue/read_ahead_kb ;; # dnbd by Thorsten Zitterell dnbd) if [ -z $nodnbdcache ] ; then # variable not really used yet mkdir /dnbd mount -n -o 'size=10%' -t tmpfs tmpfs /dnbd ( cat /dev/zero > /dnbd/cache 2>/dev/null || echo "ok" >/tmp/cache ) & clientopt="-c /dnbd/cache" waitfor /tmp/cache 10000 fi waitfor /dev/dnbd0 10000 || error "$init_nbddev" while ! dnbd-client -b $nbdhost -d /dev/dnbd0 $clientopt ; do usleep 10 done echo "0" > /sys/block/dnbd0/queue/read_ahead_kb RDEV=/dev/dnbd0 ;; esac usleep 20 RWRO="ro" if [ -n "${COWLOOP}" -a -x /bin/cowdev ] ; then modprobe ${MODPRV} cowloop || { error "$init_loadcow" nonfatal COWLOOP=""; } fi if [ -n "${COWLOOP}" ] ; then if [ -n "${UNIONFS}" ] ; then error "$init_cownonbd" UNIONFS=""; fi echo "Using Copy-on-Write block device for rw access" mount -n -t tmpfs -o size=${COWSIZE} ramfs ${RWDIR} mkdir /dev/cow && cp -a /tmp/ctl /dev/cow ln -s /dev/cowloop0 /dev/cow/0 cowdev -a /dev/nbd0 ${RWDIR}/nbd.cow usleep 10 RWRO="rw" RDEV=/dev/cow/0 # run ldconfig if not switched off via kernel command line ldcfg fi # finally mount the block device mount -n -t $RFST -o $RWRO $RDEV /mnt fi # if no type of root filesystem is passed via kernel command line try # information gathered from dhcp process if [ -z "${DNBDOPT}" -a -z "${NBDOPT}" -a -z "${NFSROOT}" ] ; then # information has to be read from dhcp configuration if [ -z "$noipyet" ] ; then waitfor /tmp/dhcp-done 20000 fi waitfor /tmp/ldap-done 20000 . /etc/machine-setup NFSROOT=${serverip}:${root_path} fi # call function for nfs mounts if [ -z "${DNBDOPT}" -a -z "${NBDOPT}" ] ; then nfsmnt ${NFSROOT} || error "$init_nfs" fi # get the complete collection of kernel modules available mount -n --bind /mnt/lib/modules/${KERNEL} /lib/modules/${KERNEL} || \ error "$init_moddir" # start hardware configuration as background process hwautocfg & # try to use unionfs for rw access if available if [ -n "${UNIONFS}" -o -n "${UNION}" ] ; then modprobe ${MODPRV} unionfs || { error "$init_loadufs" nonfatal UNIONFS=""; } fi # setup of client root filesystem dependent on the availability of UnionFS if [ -n "${UNIONFS}" ] ; then echo "Using UnionFS for rw access" [ -n ${NFSROOT} ] && NFSRO=nfs mkdir -p ${RWDIR}/union ${RWDIR}/uniontmp mount -n -t tmpfs none ${RWDIR}/uniontmp mount -n -t unionfs -o dirs=${RWDIR}/uniontmp=rw:/mnt=${NFSRO}ro \ none /mnt mkdir -p /mnt/uniontmp mount -n --move ${RWDIR}/uniontmp /mnt/uniontmp # if additional sources should be used for a combined root filesystem # probably more sources should be merged into union (${UNION} is defined) if [ -n "${UNION}" ] ; then # unionctl : fi # run ldconfig if not switched off via kernel command line ldcfg elif [ -z "$COWLOOP" ] ; then echo "Using bind mounts to ramdisk for rw access" mount -n -t tmpfs -o size=${TMPFSSIZE} ramfs ${RWDIR} for path in ${D_BINDMPTS} ; do mkdir -p ${RWDIR}/${path} >/dev/null 2>&1 mount -n --bind ${RWDIR}/${path} /mnt/${path} done # see above ... ldcfg for path in ${D_RODIRSINRW}; do if [ -d /mnt/${path} ] ; then LIST=${path}" "$LIST # exclude them from etc copy process too echo ${path}|sed -e "s,/root/,," >>/tmp/etc.exclude mkdir -p /root/${path} >/dev/null 2>&1 #[ ${DEBUGLEVEL} -gt 0 ] && | #echo " ${path} (without /root path component)" >>$LOGFILE mount -n --bind /mnt/${path} /root/${path} >/dev/null 2>&1 fi done for path in /etc/${D_SYSCONFDIR} ${D_DIRINBINDMNT} ${LIST}; do mkdir -p ${RWDIR}/${path} done testmkd ${RWDIR}/var/tmp chmod a+rwxt ${RWDIR}/var/tmp >/dev/null 2>&1 echo -e "${D_ETCEXCL} @@@COMETCEXCL@@@" >>/tmp/etc.exclude # if ld.so.cache is to be generated then do not copy the file [ -z "${NOLDSC}" ] && echo -e "ld.so.cache*" >>/tmp/etc.exclude # for tar exclude lists might be used, more difficult for cp cd /mnt tar -X /tmp/etc.exclude -cp etc/* | \ tar -xp -C ${RWDIR} 2>/dev/null ; cd / mount -n --bind ${RWDIR}/etc /mnt/etc mount -n --bind ${RWDIR}/var /mnt/var # get the "covered" mounts back into filesystem structure for i in ${LIST}; do mount -n --move /root/$i /mnt/$i #>>$LOGFILE 2>&1 done #rm -rf /root/* >/dev/null 2>&1 # run some specific stuff !? fi # script for stuff to execute during early bootup d_mkrlscript init boot.ld "Running configuration postponed from InitRD" echo "fs complete" >/tmp/fscmpl # write debug file information after filesystem setup completed echo -e "# /etc${D_SYSCONFDIR}/logfile - file created by $0 (initramfs \ from $date)\n#\n# logfile \ for linux diskless client specific debugging output\nLOGFILE=\"$LOGFILE\"\n#\ \n# debug level\nDEBUGLEVEL=\"$DEBUGLEVEL\"" \ > /mnt/etc/${D_SYSCONFDIR}/logfile || error "$init_errlog" # run distribution independent and dependent configuration of files and # services servconfig & for path in @@@COMDIRINDXS@@@ ${D_DIRINDXS} ${D_DIRINBINDMNT} ; do testmkd /mnt/${path} done for i in /var/run/utmp /var/log/wtmp /var/log/lastlog /etc/mtab ; do echo -n > /mnt/$i done chmod a+rwxt /mnt/tmp /mnt/tmp/scratch 2>/dev/null & chown 65534:0 /mnt/var/lib/nobody & echo -e "# /etc/fstab - file generated by $0 (initramfs from $date)\n#\ \tDirk von \ Suchodoletz, dirk@goe.net\n\nrootfs\t\t/\t\trootfs\t\tro\t\t 0 0\n\ proc\t\t/proc\t\tproc\t\tdefaults\t 0 0\ninitramdevs\t/dev\t\ttmpfs\ \t\trw\t\t 0 0\ndevpts\t\t/dev/pts\tdevpts\t\tmode=0620,gid=5\t 0 0\n\ usbfs\t\t/proc/bus/usb\tusbfs\t\tnoauto\t\t 0 0" >>/mnt/etc/fstab || \ error "$init_fstab" echo -e "rootfs / rootfs rw 0 0" > /mnt/etc/mtab # copy library cache if generated if [ -z "${NOLDSC}" ] ; then if waitfor /tmp/ldcfg 50000 ; then test -s /mnt/tmp/ld.so.cache && { cp /mnt/tmp/ld.so.cache /mnt/etc/ld.so.cache rm /mnt/tmp/ld.so.cache; } else error "$init_errldcfg" fi else error "$init_infldcfg" nonfatal fi # copy machine configuration (from global settings, additions made within # here and from dhcp/ldap sources) to client /etc for later checks cp /etc/machine-setup /mnt/etc waitfor /tmp/hwcfg 20000 || error "$init_errhw" waitfor /tmp/svcfg 20000 || error "$init_errsw" # IP configuration is made and should not be updated automatically, udevd # should be killed if started within init killall -9 dhcpcd dhclient pump 2>/dev/null # post init for some distro specific postinit [ -x /bin/vendor_postinit ] && /bin/vendor_postinit # start a debug shell in higher debug levels [ $DEBUGLEVEL -gt 2 ] && /bin/sh # unmount the bind mounted modules directory for i in 0 40 100 200 300 500 800 1000 1200; do usleep $i && umount -n /lib/modules/${KERNEL} 2>/dev/null && break error "$init_wait" nonfatal done [ $i -gt 1000 ] && error "$init_errumnt" # check for inittab file test -f /mnt/etc/inittab || error "$init_erritab" # close runlevel script for stuff to execute during early bootup d_mkrlscript close boot.ld "" # preparations to leave initrd - umounting ... umount -n /sys || error "$init_errsys" nonfatal umount -n /proc/bus/usb >/dev/null 2>&1 mount -n --move /dev /mnt/dev killall -9 udevd 2>/dev/null umount -n /proc # unset old environment variables unset debug date initrd ip dnbdroot nbdroot nfsroot vci vga unset BOOT_IMAGE KCMDLINE KERNEL MODPRV NWMODULES OLDPWD UDEVD_EVENT_TIMEOUT \ UDEVD_EXPECTED_SEQNUM #strinstr "bash" "$(ls -la /bin/sh)" && EE="-c" # new style of pivoting (exec -c would set an empty environment in bash) exec run-init -c dev/console /mnt /sbin/init || error "$init_runinit"