boot/scripts/create_ramdisk.ksh

	create_ramdisk.ksh revision 4681df02a975abaaef76edec9f765eb3bf66585b
#!/bin/ksh -p
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (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 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.

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

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 for $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

#
# mkisofs on s8 doesn't support functionality used by GRUB boot.
# Use ufs format for boot archive instead.
#
release=`uname -r`
if [ "$release" = "5.8" ]; then
   format=ufs
fi

shift `expr $OPTIND - 1`

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

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

function getsize
{
    # Estimate image size and add %10 overhead for ufs stuff.
    # Note, we can't use du here in case we're on a filesystem, e.g. zfs,
    # in which the disk usage is less than the sum of the file sizes.
    # The nawk code
    #
    #   {t += ($7 % 1024) ? (int($7 / 1024) + 1) * 1024 : $7}
    #
    # below rounds up the size of a file/directory, in bytes, to the
    # next multiple of 1024.  This mimics the behavior of ufs especially
    # with directories.  This results in a total size that's slightly
    # bigger than if du was called on a ufs directory.
    total_size=$(find $filelist -ls 2>/dev/null | nawk '
        {t += ($7 % 1024) ? (int($7 / 1024) + 1) * 1024 : $7}
        END {print int(t * 1.10 / 1024)}')
}

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


    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 $NO_AMD64 2> /dev/null | \
         cpio -pdum "$rdmnt" 2> /dev/null
    umount "$rdmnt"
    lofiadm -d "$rdfile"
    rmdir "$rdmnt"

    # Check if gzip exists in /usr/bin, so we only try to run gzip
    # on systems that have gzip. Then run gzip out of the patch to
    # pick it up from bfubin or something like that if needed.
    #
    if [ -x /usr/bin/gzip ] ; then
        gzip -c "$rdfile" > "$ALT_ROOT/$BOOT_ARCHIVE-new"
    else
        cat "$rdfile" > "$ALT_ROOT/$BOOT_ARCHIVE-new"
    fi
}

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 $path"
        fi
    done
    cd "/$ALT_ROOT"
    find $files 2> /dev/null | cpio -pdum "$rdmnt" 2> /dev/null
    isocmd="$isocmd \"$rdmnt\""
    rm -f "$errlog"

    # Check if gzip exists in /usr/bin, so we only try to run gzip
    # on systems that have gzip. Then run gzip out of the patch to
    # pick it up from bfubin or something like that if needed.
    #
    if [ -x /usr/bin/gzip ] ; then
        ksh -c "$isocmd" 2> "$errlog" | \
            gzip > "$ALT_ROOT/$BOOT_ARCHIVE-new"
    else
        ksh -c "$isocmd" 2> "$errlog" > "$ALT_ROOT/$BOOT_ARCHIVE-new"
    fi

    if [ -s "$errlog" ]; then
        grep Error: "$errlog" >/dev/null 2>&1
        if [ $? -eq 0 ]; then
            grep Error: "$errlog"
            rm -f "$ALT_ROOT/$BOOT_ARCHIVE-new"
        fi
    fi
    rm -f "$errlog"
}

#
# get filelist
#
filelist=`cat "$ALT_ROOT/boot/solaris/filelist.ramdisk"`
if [ -f "$ALT_ROOT/etc/boot/solaris/filelist.ramdisk" ]; then
    filelistI=`cat "$ALT_ROOT/etc/boot/solaris/filelist.ramdisk"`
fi
filelist=`echo $filelist $filelistI | sort -u`

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

scratch=tmp

if [ $format = ufs ] ; then
    # calculate image size
    getsize

    # check to see if there is sufficient space in tmpfs
    #
    tmp_free=`df -b /tmp | tail -1 | awk '{ printf ($2) }'`
    (( tmp_free = tmp_free / 2 ))

    if [ $total_size -gt $tmp_free  ] ; then
        # assumes we have enough scratch space on $ALT_ROOT
            scratch="$ALT_ROOT"
    fi
fi

rddir="/$scratch/create_ramdisk.$$.tmp"
rdfile="$rddir/rd.file"
rdmnt="$rddir/rd.mount"
errlog="$rddir/rd.errlog"

# make directory for temp files safely
rm -rf "$rddir"
mkdir "$rddir"

# Clean up upon exit.
trap 'cleanup' EXIT

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

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

# sanity check the archive before moving it into place
# the file type check also establishes that the file exists at all
#
ARCHIVE_SIZE=$(/bin/ls -l "$ALT_ROOT/$BOOT_ARCHIVE-new" |
    nawk '{print int($5 / 1024)}')
file "$ALT_ROOT/$BOOT_ARCHIVE-new" | grep gzip > /dev/null

if [ $? = 1 ] && [ -x /usr/bin/gzip ] || [ $ARCHIVE_SIZE -lt 5000 ]; then
    echo "update of $ALT_ROOT/$BOOT_ARCHIVE failed"
    rm -rf "$rddir"
    exit 1
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" "$ALT_ROOT/boot/boot_archive"
    rm -rf "$rddir"
    exit
fi

lockfs -f "/$ALT_ROOT"
mv "$ALT_ROOT/$BOOT_ARCHIVE-new" "$ALT_ROOT/$BOOT_ARCHIVE"
lockfs -f "/$ALT_ROOT"

rm -rf "$rddir"