usr/src/cmd/boot/scripts/root_archive.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22
  23 # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  24 # Use is subject to license terms.
  25 #
  26 # Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  27
  28 # utility to pack and unpack a boot/root archive
  29 # both ufs and hsfs (iso9660) format archives are unpacked
  30 # only ufs archives are generated
  31 #
  32 # usage: pack   <archive> <root>
  33 #        unpack <archive> <root>
  34 #
  35 #   Where <root> is the directory to unpack to and will be cleaned out
  36 #   if it exists.
  37 #
  38
  39 usage()
  40 {
  41         printf "usage: root_archive pack <archive> <root>\n"
  42         printf "       root_archive unpack <archive> <root>\n"
  43         exit 1
  44 }
  45
  46 cleanup()
  47 {
  48         if [ -d $MNT ] ; then
  49                 umount $MNT 2> /dev/null
  50                 rmdir $MNT
  51         fi
  52
  53         lofiadm -d "$TMR" 2>/dev/null
  54         if [ "$REALTHING" != true ] ; then
  55                 rm -f "$TMR"
  56         fi
  57         rm -f "$TMR.gz"
  58         rm -f /tmp/flist$$
  59 }
  60
  61 do_unpack()
  62 {
  63         (
  64                 cd $MNT
  65                 find . -print | cpio -pdum "$UNPACKED_ROOT" 2> /dev/null
  66         )
  67         # increase the chances the unmount will succeed
  68         umount -f $MNT
  69 }
  70
  71 unpack()
  72 {
  73         MR=$1
  74         if [ ! -f "$MR" ] ; then
  75                 printf "$MR: not found\n"
  76                 usage
  77         fi
  78
  79         if [ `uname -i` = i86pc ] ; then
  80                 gzcat "$MR" > $TMR
  81         else
  82                 REALTHING=true ; export REALTHING
  83                 TMR="$MR"
  84         fi
  85
  86         LOFIDEV=`/usr/sbin/lofiadm -a $TMR`
  87         if [ $? != 0 ] ; then
  88                 echo lofi plumb failed
  89                 exit 2
  90         fi
  91
  92         mkdir -p $MNT
  93
  94         FSTYP=`fstyp $LOFIDEV`
  95
  96         if [ "$FSTYP" = ufs ] ; then
  97                 /usr/sbin/mount -o ro,nologging $LOFIDEV $MNT
  98                 do_unpack
  99         elif [ "$FSTYP" = hsfs ] ; then
 100                 /usr/sbin/mount -F hsfs -o ro $LOFIDEV $MNT
 101                 do_unpack
 102         else
 103                 printf "invalid root archive\n"
 104         fi
 105
 106
 107         rmdir $MNT
 108         lofiadm -d $TMR ; LOFIDEV=
 109         if [ "$REALTHING" != true ] ; then
 110                 rm $TMR
 111         fi
 112 }
 113
 114 compress()
 115 {
 116         SRC=$1
 117         DST=$2
 118
 119         (
 120                 cd $SRC
 121                 filelist=`find .`
 122
 123                 for file in $filelist ; do
 124
 125                         file=`echo $file | sed s#^./##`
 126
 127                         # copy all files over to preserve hard links
 128                         #
 129                         echo $file | cpio -pdum $DST 2> /dev/null
 130
 131                         if [ -f $file ] && [ -s $file ] && [ ! -h $file ] ; then
 132                                 fiocompress -mc $file $DST/$file &
 133                         fi
 134
 135                 done
 136
 137                 wait `pgrep fiocompress`
 138
 139                 # now re-copy a couple of uncompressed files
 140
 141                 if [ -d "$SRC/platform/i86pc" ] ; then
 142                         find `cat boot/solaris/filelist.ramdisk` -type file \
 143                             -print 2> /dev/null > /tmp/flist$$
 144                         find usr/kernel -type file -print 2> /dev/null \
 145                             >> /tmp/flist$$
 146                         # some of the files are replaced with links into
 147                         # tmp/root on the miniroot, so find the backing files
 148                         # from there as well and add them to the list ti
 149                         # be copied uncompressed
 150                         (
 151                                 cd $SRC/tmp/root
 152                                 find `cat ../../boot/solaris/filelist.ramdisk` \
 153                                     -type file -print 2> /dev/null | \
 154                                     sed 's#^#tmp/root/#' >> /tmp/flist$$
 155                         )
 156                         flist=`cat /tmp/flist$$`
 157                         (
 158                                 cd $DST
 159                                 rm -f $flist
 160                         )
 161                         for file in $flist ; do
 162                                 echo $file | cpio -pdum $DST 2> /dev/null
 163                         done
 164                 else
 165                         find kernel platform -name unix | \
 166                             cpio -pdum $DST 2> /dev/null
 167                         find kernel platform -name genunix | cpio -pdum $DST \
 168                             2> /dev/null
 169                         find kernel platform -name platmod | cpio -pdum $DST \
 170                             2> /dev/null
 171                         find `find kernel platform -name cpu` | \
 172                             cpio -pdum $DST 2> /dev/null
 173                         find `find kernel platform -name kmdb\*` | \
 174                                 cpio -pdum $DST 2> /dev/null
 175                         find kernel/misc/sparcv9/ctf kernel/fs/sparcv9/dcfs \
 176                             etc/system etc/name_to_major etc/path_to_inst \
 177                             etc/name_to_sysnum  etc/driver_aliases \
 178                             etc/driver_classes etc/minor_perm | \
 179                             cpio -pdum $DST 2> /dev/null
 180                 fi
 181         )
 182 }
 183
 184 root_is_ramdisk()
 185 {
 186         grep -v "set root_is_ramdisk=" "$UNPACKED_ROOT"/etc/system | \
 187             grep -v "set ramdisk_size=" > /tmp/system.$$
 188         cat /tmp/system.$$ > "$UNPACKED_ROOT"/etc/system
 189         rm /tmp/system.$$
 190
 191         echo set root_is_ramdisk=1 >> "$UNPACKED_ROOT"/etc/system
 192         echo set ramdisk_size=$1 >> "$UNPACKED_ROOT"/etc/system
 193 }
 194
 195 pack()
 196 {
 197         MR="$1"
 198         [ -d "$UNPACKED_ROOT" ] || usage
 199
 200         # always compress if fiocompress exists
 201         #
 202         if [ -x /usr/sbin/fiocompress ] ; then
 203                 COMPRESS=true
 204         fi
 205
 206         # Estimate image size and add %10 overhead for ufs stuff.
 207         # Note, we can't use du here in case $UNPACKED_ROOT is on a filesystem,
 208         # e.g. zfs, in which the disk usage is less than the sum of the file
 209         # sizes.  The nawk code
 210         #
 211         #       {t += ($7 % 1024) ? (int($7 / 1024) + 1) * 1024 : $7}
 212         #
 213         # below rounds up the size of a file/directory, in bytes, to the
 214         # next multiple of 1024.  This mimics the behavior of ufs especially
 215         # with directories.  This results in a total size that's slightly
 216         # bigger than if du was called on a ufs directory.
 217         #
 218         # if the operation in turn is compressing the files the amount
 219         # of typical shrinkage is used to come up with a useful archive
 220         # size
 221         size=$(find "$UNPACKED_ROOT" -ls | nawk '
 222             {t += ($7 % 1024) ? (int($7 / 1024) + 1) * 1024 : $7}
 223             END {print int(t * 1.10 / 1024)}')
 224         if [ "$COMPRESS" = true ] ; then
 225                 size=`echo $size | nawk '{s = $1} END {print int(s * 0.6)}'`
 226         fi
 227
 228         /usr/sbin/mkfile ${size}k "$TMR"
 229
 230         LOFIDEV=`/usr/sbin/lofiadm -a "$TMR"`
 231         if [ $? != 0 ] ; then
 232                 echo lofi plumb failed
 233                 exit 2
 234         fi
 235
 236         RLOFIDEV=`echo $LOFIDEV | sed s/lofi/rlofi/`
 237         newfs $RLOFIDEV < /dev/null 2> /dev/null
 238         mkdir -p $MNT
 239         mount -o nologging $LOFIDEV $MNT
 240         rmdir $MNT/lost+found
 241
 242         if [ -d "$UNPACKED_ROOT/kernel/drv/sparcv9" ] ; then
 243                 root_is_ramdisk $size
 244         fi
 245
 246         (
 247                 cd "$UNPACKED_ROOT"
 248                 if [ "$COMPRESS" = true ] ; then
 249                         compress . $MNT
 250                 else
 251                         find . -print | cpio -pdum $MNT 2> /dev/null
 252                 fi
 253         )
 254         lockfs -f $MNT
 255         umount $MNT
 256         rmdir $MNT
 257
 258         if [ -d "$UNPACKED_ROOT/kernel/drv/sparcv9" ] ; then
 259                 "$UNPACKED_ROOT/usr/sbin/installboot" \
 260                     "$UNPACKED_ROOT/platform/sun4u/lib/fs/ufs/bootblk" \
 261                     $RLOFIDEV
 262         fi
 263
 264         lofiadm -d $LOFIDEV
 265         LOFIDEV=
 266
 267         rm -f "$TMR.gz"
 268
 269         if [ -d "$UNPACKED_ROOT/kernel/drv/sparcv9" ] ; then
 270                 mv "$TMR" "$MR"
 271         else
 272                 gzip -f "$TMR"
 273                 mv "$TMR.gz" "$MR"
 274         fi
 275
 276         chmod a+r "$MR"
 277 }
 278
 279 strip_amd64()
 280 {
 281         find "$UNPACKED_ROOT" -name amd64 -type directory | xargs rm -rf
 282 }
 283
 284 # main
 285 #
 286
 287 EXTRA_SPACE=0
 288 STRIP_AMD64=
 289 COMPRESS=
 290
 291 PATH=/usr/sbin:/usr/bin:/opt/sfw/bin ; export PATH
 292
 293 while getopts s:6c opt ; do
 294         case $opt in
 295         s)      EXTRA_SPACE="$OPTARG"
 296                 ;;
 297         6)      STRIP_AMD64=false
 298                 ;;
 299         c)      COMPRESS=true
 300                 ;;
 301         *)      usage
 302                 ;;
 303         esac
 304 done
 305 shift `expr $OPTIND - 1`
 306
 307 [ $# == 3 ] || usage
 308
 309 UNPACKED_ROOT="$3"
 310 BASE="`pwd`"
 311 MNT=/tmp/mnt$$
 312 TMR=/tmp/mr$$
 313 LOFIDEV=
 314 MR="$2"
 315
 316 # sanity check
 317 [ "$UNPACKED_ROOT" != "/" ] || usage
 318
 319 if [ "`dirname $MR`" = . ] ; then
 320         MR="$BASE/$MR"
 321 fi
 322 if [ "`dirname $UNPACKED_ROOT`" = . ] ; then
 323         UNPACKED_ROOT="$BASE/$UNPACKED_ROOT"
 324 fi
 325
 326 trap cleanup EXIT
 327
 328 # always unpack into a fresh root
 329 case $1 in
 330         unpack)
 331                 rm -rf "$UNPACKED_ROOT"
 332                 mkdir -p "$UNPACKED_ROOT"
 333                 ;;
 334 esac
 335 [ -d "$UNPACKED_ROOT" ] || usage
 336
 337 case $1 in
 338         pack)   pack "$MR"
 339                 ;;
 340         unpack) unpack "$MR"
 341                 ;;
 342         *)      usage
 343                 ;;
 344 esac