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eb7bf00306
Instead, load them as part of the rc.d system. This allows us to prioritize the initidiskless script so it runs before the configuration files are loaded and allows us to get rid of the exit 2 hack in /etc/rc. The exit 2 never worked anyway since it did not unset the prior configuration, causing the diskless code to not operate properly. Do a major cleanup and revamping of the diskless code for RCNG. This will be backported to the non-RCNG scripts as well as -stable. With suggestions from: Mike Makonnen <mtm@identd.net> MFC after: 7 days
224 lines
7.4 KiB
Bash
224 lines
7.4 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 1999 Matt Dillion
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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 AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# PROVIDE: initdiskless
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# KEYWORD: FreeBSD
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# On entry to this script the entire system consists of a read-only root
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# mounted via NFS. We use the contents of /conf to create and populate
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# memory filesystems. The kernel has run BOOTP and configured an interface
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# (otherwise it would not have been able to mount the NFS root!)
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#
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# The following directories are scanned. Each sucessive directory overrides
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# (is merged into) the previous one.
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#
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# /conf/base universal base
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# /conf/default modified by a secondary universal base
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# /conf/${ipba} modified based on the assigned broadcast IP
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# /conf/${ip} modified based on the machine's assigned IP
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#
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# Each of these directories may contain any number of subdirectories which
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# represent directories in / on the diskless machine. The existance of
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# these subdirectories causes this script to create a MEMORY FILESYSTEM for
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# /<sub_directory_name>. For example, if /conf/base/etc exists then a
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# memory filesystem will be created for /etc.
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#
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# If a subdirectory contains the file 'diskless_remount' the contents of
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# the file is used to remount the subdirectory prior to it being copied to
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# the memory filesystem. For example, if /conf/base/etc/diskless_remount
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# contains the string 'my.server.com:/etc' then my.server.com:/etc will be
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# mounted in place of the subdirectory. This allows you to avoid making
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# duplicates of system directories in /conf.
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#
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# If a subdirectory contains the file 'md_size', the contents of the
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# file is used to determine the size of the memory filesystem, in 512
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# byte sectors. The default is 8192 (4MB). You only have to specify an
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# md_size if the default doesn't work for you (i.e. if it is too big or
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# too small). Note that in -current the default is 4096 (2MB). For
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# example, /conf/base/etc/md_size might contain '16384'.
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#
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# If /conf/<special_dir>/SUBDIR.cpio.gz exists, the file is cpio'd into
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# the specified /SUBDIR (and a memory filesystem is created for /SUBDIR
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# if necessary).
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#
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# If /conf/<special_dir>/SUBDIR.remove exists, the file contains a list
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# of paths which are rm -rf'd relative to /SUBDIR.
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#
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# You will almost universally want to create a /conf/base/etc containing
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# a diskless_remount and possibly an md_size file. You will then almost
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# universally want to override rc.conf, rc.local, and fstab by creating
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# /conf/default/etc/{rc.conf,rc.local,fstab}. Your fstab should be sure
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# to mount a /usr... typically an NFS readonly /usr.
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#
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# NOTE! rc.diskless2 will create /var, /tmp, and /dev. Those filesystems
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# should not be specified in /conf. At least not yet.
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dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null`
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[ ${dlv:=0} -eq 0 ] && exit 0
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# chkerr:
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#
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# Routine to check for error
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#
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# checks error code and drops into shell on failure.
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# if shell exits, terminates script as well as /etc/rc.
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#
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chkerr() {
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case $1 in
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0)
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;;
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*)
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echo "$2 failed: dropping into /bin/sh"
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/bin/sh
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# RESUME
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;;
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esac
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}
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# Create a generic memory disk
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#
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mount_md() {
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/sbin/mdmfs -i 4096 -s $1 -M md $2
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}
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# Create the memory filesystem if it has not already been created
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#
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create_md() {
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if [ "x`eval echo \\$md_created_$1`" = "x" ]; then
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if [ "x`eval echo \$md_size_$1`" = "x" ]; then
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md_size=4096
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else
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md_size=`eval echo \\$md_size_$1`
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fi
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mount_md $md_size /$1
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/bin/chmod 755 /$1
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eval md_created_$1=created
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fi
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}
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# DEBUGGING
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#
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# set -v
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# Figure out our interface and IP.
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#
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bootp_ifc=""
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bootp_ipa=""
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bootp_ipbca=""
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iflist=`ifconfig -l`
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for i in ${iflist} ; do
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set `ifconfig ${i}`
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while [ $# -ge 1 ] ; do
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if [ "${bootp_ifc}" = "" -a "$1" = "inet" ] ; then
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bootp_ifc=${i} ; bootp_ipa=${2} ; shift
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fi
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if [ "${bootp_ipbca}" = "" -a "$1" = "broadcast" ] ; then
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bootp_ipbca=$2; shift
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fi
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shift
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done
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if [ "${bootp_ifc}" != "" ] ; then
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break
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fi
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done
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echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
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# Resolve templates in /conf/base, /conf/default, /conf/${bootp_ipbca},
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# and /conf/${bootp_ipa}. For each subdirectory found within these
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# directories:
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#
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# - calculate memory filesystem sizes. If the subdirectory (prior to
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# NFS remounting) contains the file 'md_size', the contents specified
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# in 512 byte sectors will be used to size the memory filesystem. Otherwise
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# 8192 sectors (4MB) is used.
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#
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# - handle NFS remounts. If the subdirectory contains the file
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# diskless_remount, the contents of the file is NFS mounted over
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# the directory. For example /conf/base/etc/diskless_remount
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# might contain 'myserver:/etc'. NFS remounts allow you to avoid
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# having to dup your system directories in /conf. Your server must
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# be sure to export those filesystems -alldirs, however.
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#
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for i in base default ${bootp_ipbca} ${bootp_ipa} ; do
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for j in /conf/$i/* ; do
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# memory filesystem size specification
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#
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subdir=${j##*/}
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if [ -d $j -a -f $j/md_size ]; then
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eval md_size_$subdir=`cat $j/md_size`
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fi
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# NFS remount
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#
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if [ -d $j -a -f $j/diskless_remount ]; then
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nfspt=`/bin/cat $j/diskless_remount`
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mount_nfs $nfspt $j
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chkerr $? "mount_nfs $nfspt $j"
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fi
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done
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done
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# - Create all required MFS filesystems and populate them from
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# our templates. Support both a direct template and a dir.cpio.gz
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# archive. Support dir.remove files containing a list of relative
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# paths to remove.
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#
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# TODO:
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# + find a way to assign a 'group' identifier to a machine
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# so we can use group-specific configurations;
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for i in base default ${bootp_ipbca} ${bootp_ipa} ; do
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for j in /conf/$i/* ; do
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subdir=${j##*/}
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if [ -d $j ]; then
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create_md $subdir
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cp -Rp $j/* /$subdir
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fi
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done
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for j in /conf/$i/*.cpio.gz ; do
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subdir=${j%*.cpio.gz}
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subdir=${subdir##*/}
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if [ -f $j ]; then
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create_md $subdir
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echo "Loading /$subdir from cpio archive $j"
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(cd / ; /stand/gzip -d < $j | /stand/cpio --extract -d )
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fi
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done
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for j in /conf/$i/*.remove ; do
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subdir=${j%*.remove}
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subdir=${subdir##*/}
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if [ -f $j ]; then
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# doubly sure it is a memory disk before rm -rf'ing
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create_md $subdir
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(cd /$subdir; rm -rf `/bin/cat $j`)
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fi
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done
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done
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