rc.initdiskless revision 110942
150565Sphk#!/bin/sh 250565Sphk# 350565Sphk# Copyright (c) 1999 Matt Dillion 450565Sphk# All rights reserved. 550565Sphk# 650565Sphk# Redistribution and use in source and binary forms, with or without 750565Sphk# modification, are permitted provided that the following conditions 850565Sphk# are met: 950565Sphk# 1. Redistributions of source code must retain the above copyright 1050565Sphk# notice, this list of conditions and the following disclaimer. 1150565Sphk# 2. Redistributions in binary form must reproduce the above copyright 1250565Sphk# notice, this list of conditions and the following disclaimer in the 1350565Sphk# documentation and/or other materials provided with the distribution. 1450565Sphk# 1550565Sphk# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1651111Sjulian# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1750565Sphk# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1850565Sphk# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1950565Sphk# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2050565Sphk# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2150728Sphk# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2250565Sphk# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2350565Sphk# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2450565Sphk# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2550565Sphk# SUCH DAMAGE. 2650565Sphk# 2750565Sphk# $FreeBSD: head/etc/rc.initdiskless 110942 2003-02-15 16:29:20Z jhay $ 2850565Sphk# 2950565Sphk# PROVIDE: initdiskless 3050565Sphk# KEYWORD: FreeBSD 3150565Sphk 3251215Sphk 3350565Sphk# On entry to this script the entire system consists of a read-only root 3450565Sphk# mounted via NFS. We use the contents of /conf to create and populate 3550565Sphk# memory filesystems. The kernel has run BOOTP and configured an interface 3651198Sphk# (otherwise it would not have been able to mount the NFS root!) 3751198Sphk# 3850565Sphk# The following directories are scanned. Each sucessive directory overrides 3951198Sphk# (is merged into) the previous one. 4051215Sphk# 4151215Sphk# /conf/base universal base 4251215Sphk# /conf/default modified by a secondary universal base 4351215Sphk# /conf/${ipba} modified based on the assigned broadcast IP 4451215Sphk# /conf/${ip} modified based on the machine's assigned IP 4551215Sphk# 4651215Sphk# Each of these directories may contain any number of subdirectories which 4750565Sphk# represent directories in / on the diskless machine. The existance of 4850565Sphk# these subdirectories causes this script to create a MEMORY FILESYSTEM for 4953437Sjkh# /<sub_directory_name>. For example, if /conf/base/etc exists then a 5053437Sjkh# memory filesystem will be created for /etc. 5151243Sphk# 5251198Sphk# If a subdirectory contains the file 'diskless_remount' the contents of 5350565Sphk# the file is used to remount the subdirectory prior to it being copied to 5450565Sphk# the memory filesystem. For example, if /conf/base/etc/diskless_remount 5550565Sphk# contains the string 'my.server.com:/etc' then my.server.com:/etc will be 5652917Sphk# mounted in place of the subdirectory. This allows you to avoid making 5751215Sphk# duplicates of system directories in /conf. 5850565Sphk# 5950565Sphk# If a subdirectory contains the file 'md_size', the contents of the 6050565Sphk# file is used to determine the size of the memory filesystem, in 512 6150728Sphk# byte sectors. The default is 8192 (4MB). You only have to specify an 6250728Sphk# md_size if the default doesn't work for you (i.e. if it is too big or 6350728Sphk# too small). Note that in -current the default is 4096 (2MB). For 6450728Sphk# example, /conf/base/etc/md_size might contain '16384'. 6550728Sphk# 6650728Sphk# If /conf/<special_dir>/SUBDIR.cpio.gz exists, the file is cpio'd into 6750728Sphk# the specified /SUBDIR (and a memory filesystem is created for /SUBDIR 6850728Sphk# if necessary). 6950728Sphk# 7050728Sphk# If /conf/<special_dir>/SUBDIR.remove exists, the file contains a list 7150728Sphk# of paths which are rm -rf'd relative to /SUBDIR. 7250728Sphk# 7350728Sphk# You will almost universally want to create a /conf/base/etc containing 7450728Sphk# a diskless_remount and possibly an md_size file. You will then almost 7550728Sphk# universally want to override rc.conf, rc.local, and fstab by creating 7650728Sphk# /conf/default/etc/{rc.conf,rc.local,fstab}. Your fstab should be sure 7750728Sphk# to mount a /usr... typically an NFS readonly /usr. 7850728Sphk# 7950728Sphk# NOTE! rc.diskless2 will create /var, /tmp, and /dev. Those filesystems 8050728Sphk# should not be specified in /conf. At least not yet. 8150728Sphk 8250728Sphkdlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null` 8350728Sphk[ ${dlv:=0} -eq 0 ] && exit 0 8450728Sphk 8550728Sphk# chkerr: 8650728Sphk# 8750728Sphk# Routine to check for error 8850728Sphk# 8950728Sphk# checks error code and drops into shell on failure. 9050728Sphk# if shell exits, terminates script as well as /etc/rc. 9150728Sphk# 9250728Sphkchkerr() { 9350728Sphk case $1 in 9450565Sphk 0) 9550565Sphk ;; 9650565Sphk *) 9750565Sphk echo "$2 failed: dropping into /bin/sh" 9850565Sphk /bin/sh 9950565Sphk # RESUME 10050728Sphk ;; 10150728Sphk esac 10250728Sphk} 10350728Sphk 10450565Sphk# Create a generic memory disk 10550565Sphk# 10650565Sphkmount_md() { 10750565Sphk /sbin/mdmfs -i 4096 -s $1 -M md $2 10850565Sphk} 10950565Sphk 11050565Sphk# Create the memory filesystem if it has not already been created 11150728Sphk# 11250565Sphkcreate_md() { 11350728Sphk if [ "x`eval echo \\$md_created_$1`" = "x" ]; then 11450565Sphk if [ "x`eval echo \\$md_size_$1`" = "x" ]; then 11550565Sphk md_size=4096 11650565Sphk else 11750728Sphk md_size=`eval echo \\$md_size_$1` 11852917Sphk fi 11952917Sphk mount_md $md_size /$1 12054815Sphk /bin/chmod 755 /$1 12154815Sphk eval md_created_$1=created 12254815Sphk fi 12352917Sphk} 12452917Sphk 12552917Sphk# DEBUGGING 12651860Sphk# 12751878Ssos# set -v 12851878Ssos 12951826Sphk# Figure out our interface and IP. 13051860Sphk# 13151826Sphkbootp_ifc="" 13251826Sphkbootp_ipa="" 13351826Sphkbootp_ipbca="" 13450728Sphkiflist=`ifconfig -l` 13550728Sphkfor i in ${iflist} ; do 13651826Sphk set `ifconfig ${i}` 13751826Sphk while [ $# -ge 1 ] ; do 13851826Sphk if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then 13950728Sphk bootp_ifc=${i} ; bootp_ipa=${2} ; shift 14050728Sphk fi 14152917Sphk if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then 14250728Sphk bootp_ipbca=$2; shift 14352917Sphk fi 14450565Sphk shift 14550728Sphk done 14651924Sphk if [ "${bootp_ifc}" != "" ] ; then 14752917Sphk break 14852917Sphk fi 14952917Sphkdone 15052917Sphkecho "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}" 15152917Sphk 15252917Sphk# Resolve templates in /conf/base, /conf/default, /conf/${bootp_ipbca}, 15350728Sphk# and /conf/${bootp_ipa}. For each subdirectory found within these 15450565Sphk# directories: 15550565Sphk# 15650565Sphk# - calculate memory filesystem sizes. If the subdirectory (prior to 15750565Sphk# NFS remounting) contains the file 'md_size', the contents specified 15850565Sphk# in 512 byte sectors will be used to size the memory filesystem. Otherwise 15950565Sphk# 8192 sectors (4MB) is used. 16050565Sphk# 16150565Sphk# - handle NFS remounts. If the subdirectory contains the file 16250565Sphk# diskless_remount, the contents of the file is NFS mounted over 16350565Sphk# the directory. For example /conf/base/etc/diskless_remount 16450565Sphk# might contain 'myserver:/etc'. NFS remounts allow you to avoid 16551822Sphk# having to dup your system directories in /conf. Your server must 16651826Sphk# be sure to export those filesystems -alldirs, however. 16751924Sphk# 16851826Sphkfor i in base default ${bootp_ipbca} ${bootp_ipa} ; do 16950565Sphk for j in /conf/$i/* ; do 17050565Sphk # memory filesystem size specification 17150565Sphk # 17250565Sphk subdir=${j##*/} 17350565Sphk if [ -d $j -a -f $j/md_size ]; then 17450565Sphk eval md_size_$subdir=`cat $j/md_size` 17550565Sphk fi 17650565Sphk 17750565Sphk # NFS remount 17850565Sphk # 17950565Sphk if [ -d $j -a -f $j/diskless_remount ]; then 18050565Sphk nfspt=`/bin/cat $j/diskless_remount` 18151860Sphk mount_nfs $nfspt $j 18250565Sphk chkerr $? "mount_nfs $nfspt $j" 18350565Sphk fi 18451860Sphk done 18551860Sphkdone 18651860Sphk 18750565Sphk# - Create all required MFS filesystems and populate them from 18850565Sphk# our templates. Support both a direct template and a dir.cpio.gz 18950565Sphk# archive. Support dir.remove files containing a list of relative 19050565Sphk# paths to remove. 19150565Sphk# 19250565Sphk# TODO: 19350565Sphk# + find a way to assign a 'group' identifier to a machine 19450565Sphk# so we can use group-specific configurations; 19550565Sphk 19655763Sphkfor i in base default ${bootp_ipbca} ${bootp_ipa} ; do 19750565Sphk for j in /conf/$i/* ; do 19850565Sphk subdir=${j##*/} 19950565Sphk if [ -d $j ]; then 20050565Sphk create_md $subdir 20151215Sphk cp -Rp $j/* /$subdir 20250565Sphk fi 20350565Sphk done 20450565Sphk for j in /conf/$i/*.cpio.gz ; do 20550565Sphk subdir=${j%*.cpio.gz} 20650565Sphk subdir=${subdir##*/} 20750565Sphk if [ -f $j ]; then 20850565Sphk create_md $subdir 20950565Sphk echo "Loading /$subdir from cpio archive $j" 21050565Sphk (cd / ; /stand/gzip -d < $j | /stand/cpio --extract -d ) 21150565Sphk fi 21250565Sphk done 21350565Sphk for j in /conf/$i/*.remove ; do 21450565Sphk subdir=${j%*.remove} 21551215Sphk subdir=${subdir##*/} 21650565Sphk if [ -f $j ]; then 21750565Sphk # doubly sure it is a memory disk before rm -rf'ing 21850565Sphk create_md $subdir 21950565Sphk (cd /$subdir; rm -rf `/bin/cat $j`) 22050565Sphk fi 22150565Sphk done 22250565Sphkdone 22350728Sphk 22450565Sphk