boot/scripts/create_ramdisk.ksh

	create_ramdisk.ksh revision 7c478bd95313f5f23a4c958a745db2134aa03244
#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License").  You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#

# Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.

#pragma ident   "%Z%%M% %I% %E% SMI"

#
# basic setup
#
rdfile=/tmp/ramdisk.$$
rdmnt=/tmp/rd_mount.$$
format=ufs
ALT_ROOT=
NO_AMD64=

BOOT_ARCHIVE=platform/i86pc/boot_archive

export PATH=${PATH}:/usr/sbin:/usr/bin:/sbin

#
# Parse options
#
while getopts R: OPT 2> /dev/null
do
        case $OPT in
        R)      ALT_ROOT="$OPTARG"
        if [ "$ALT_ROOT" != "/" ]; then
            echo "Creating ram disk on ${ALT_ROOT}"
        fi
        ;;
        ?)      echo Usage: ${0##*/}: [-R \<root\>]
        exit ;;
        esac
done

if [ -x /usr/bin/mkisofs -o -x /tmp/bfubin/mkisofs ] ; then
    format=isofs
fi

shift `expr $OPTIND - 1`

if [ $# -eq 1 ]; then
    ALT_ROOT=$1
    echo "Creating ram disk on ${ALT_ROOT}"
fi

# Clean up upon exit.
trap 'cleanup' EXIT

function cleanup {
    umount -f $rdmnt 2>/dev/null
    lofiadm -d $rdfile 2>/dev/null
    rm -fr $rdfile $rdfile.gz $rdmnt 2> /dev/null
}

function getsize {
    # Estimate image size, add %10 overhead for ufs stuff
    total_size=0
    for file in $filelist
    do
        du -sk ${ALT_ROOT}/${file} | read size name
        (( total_size += size ))
    done
    (( total_size += total_size * 10 / 100 ))
}

function create_ufs
{
    # should we exclude amd64 binaries?
    [ $is_amd64 -eq 0 ] && NO_AMD64="-name amd64 -prune"

    # calculate image size
    getsize

    mkfile ${total_size}k ${rdfile}
    lofidev=`lofiadm -a ${rdfile}`
    newfs ${lofidev} < /dev/null 2> /dev/null
    mkdir ${rdmnt}
    mount -F mntfs mnttab /etc/mnttab > /dev/null 2>&1
    mount -o nologging ${lofidev} ${rdmnt}


    # do the actual copy
    cd /${ALT_ROOT}
    find $filelist -print ${NO_AMD64}| cpio -pdum $rdmnt 2> /dev/null
    umount ${rdmnt}
    lofiadm -d ${rdfile}
    rmdir ${rdmnt}
    gzip -c ${rdfile} > ${ALT_ROOT}/${BOOT_ARCHIVE}-new
}

function create_isofs
{
    # should we exclude amd64 binaries?
    [ $is_amd64 = 0 ] && NO_AMD64="-m amd64"

    # create image directory seed with graft points
    mkdir ${rdmnt}
    files=
    isocmd="mkisofs -quiet -graft-points -dlrDJN -relaxed-filenames ${NO_AMD64}"
    for path in $filelist
    do
        if [ -d ${ALT_ROOT}/$path ]; then
            isocmd="$isocmd $path/=${ALT_ROOT}/$path"
            mkdir -p ${rdmnt}/$path
        elif [ -f ${ALT_ROOT}/$path ]; then
            files="$files $path"
        else
            echo "/${ALT_ROOT}/$path not present"
        fi
    done
    cd /${ALT_ROOT}
    find $files 2> /dev/null | cpio -pdum ${rdmnt} 2> /dev/null
    isocmd="$isocmd ${rdmnt}"
    ${isocmd} 2> /dev/null | gzip > ${ALT_ROOT}/${BOOT_ARCHIVE}-new
}

#
# get filelist
#
filelist=$(< ${ALT_ROOT}/boot/solaris/filelist.ramdisk)
if [ -f ${ALT_ROOT}/etc/boot/solaris/filelist.ramdisk ]; then
    filelist="$filelist $(< ${ALT_ROOT}/etc/boot/solaris/filelist.ramdisk)"
fi

#
# decide if cpu is amd64 capable
#
prtconf -v /devices | grep CPU_not_amd64 > /dev/null 2>&1
is_amd64=$?

echo "updating ${ALT_ROOT}/${BOOT_ARCHIVE}...this may take a minute"

if [ $format = "ufs" ]; then
    create_ufs
else
    create_isofs
fi

#
# For the diskless case, hardlink archive to /boot to make it
# visible via tftp. /boot is lofs mounted under /tftpboot/<hostname>.
# NOTE: this script must work on both client and server
#
grep "[  ]/[     ]*nfs[  ]" $ALT_ROOT/etc/vfstab > /dev/null
if [ $? = 0 ]; then
    mv ${ALT_ROOT}/${BOOT_ARCHIVE}-new ${ALT_ROOT}/${BOOT_ARCHIVE}
    rm -f ${ALT_ROOT}/boot/boot_archive
    ln ${ALT_ROOT}/${BOOT_ARCHIVE} ${ALT_ROOT}/boot/boot_archive
    exit
fi

lockfs -f /$ALT_ROOT
mv ${ALT_ROOT}/${BOOT_ARCHIVE}-new ${ALT_ROOT}/${BOOT_ARCHIVE}
lockfs -f /$ALT_ROOT