mkinitrd-suse.sh

   1 #!/bin/bash --norc
   2 #
   3 # mkinitrd compability wrapper for SUSE.
   4 #
   5 # Copyright (c) 2013 SUSE Linux Products GmbH. All rights reserved.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 boot_dir="/boot"
  22 quiet=0
  23 host_only=1
  24 force=0
  25 logfile=/var/log/YaST2/mkinitrd.log
  26 dracut_cmd=dracut
  27
  28 error() { echo "$@" >&2; }
  29
  30 usage () {
  31     [[ $1 = '-n' ]] && cmd=echo || cmd=error
  32
  33     $cmd "usage: ${0##*/} [options]"
  34     $cmd ""
  35     $cmd "      Create initial ramdisk images that contain all kernel modules needed"
  36     $cmd "      in the early boot process, before the root file system becomes"
  37     $cmd "      available."
  38     $cmd "      This usually includes SCSI and/or RAID modules, a file system module"
  39     $cmd "      for the root file system, or a network interface driver module for dhcp."
  40     $cmd ""
  41     $cmd "      options:"
  42     $cmd "      -f \"feature list\"     Features to be enabled when generating initrd."
  43     $cmd "                              Available features are:"
  44     $cmd "                                      iscsi, md, multipath, lvm, lvm2,"
  45     $cmd "                                      ifup, fcoe, dcbd"
  46     $cmd "      -k \"kernel list\"      List of kernel images for which initrd files are"
  47     $cmd "                              created. Defaults to all kernels found in /boot."
  48     $cmd "      -i \"initrd list\"      List of file names for the initrd; position have"
  49     $cmd "                              match to \"kernel list\". Defaults to all kernels"
  50     $cmd "                              found in /boot."
  51     $cmd "      -b boot_dir             Boot directory. Defaults to /boot."
  52     $cmd "      -t tmp_dir              Temporary directory. Defaults to /var/tmp."
  53     $cmd "      -M map                  System.map file to use."
  54     $cmd "      -A                      Create a so called \"monster initrd\" which"
  55     $cmd "                              includes all features and modules possible."
  56     $cmd "      -B                      Do not update bootloader configuration."
  57     $cmd "      -v                      Verbose mode."
  58     $cmd "      -L                      Disable logging."
  59     $cmd "      -h                      This help screen."
  60     $cmd "      -m \"module list\"      Modules to include in initrd. Defaults to the"
  61     $cmd "                              INITRD_MODULES variable in /etc/sysconfig/kernel"
  62     $cmd "      -u \"DomU module list\" Modules to include in initrd. Defaults to the"
  63     $cmd "                              DOMU_INITRD_MODULES variable in"
  64     $cmd "                              /etc/sysconfig/kernel."
  65     $cmd "      -d root_device          Root device. Defaults to the device from"
  66     $cmd "                              which / is mounted. Overrides the rootdev"
  67     $cmd "                              enviroment variable if set."
  68     $cmd "      -j device               Journal device"
  69     $cmd "      -D interface            Run dhcp on the specified interface."
  70     $cmd "      -I interface            Configure the specified interface statically."
  71     $cmd "      -a acpi_dsdt            Attach compiled ACPI DSDT (Differentiated"
  72     $cmd "                              System Description Table) to initrd. This"
  73     $cmd "                              replaces the DSDT of the BIOS. Defaults to"
  74     $cmd "                              the ACPI_DSDT variable in /etc/sysconfig/kernel."
  75     $cmd "      -s size                 Add splash animation and bootscreen to initrd."
  76
  77     [[ $1 = '-n' ]] && exit 0
  78     exit 1
  79 }
  80
  81 # Little helper function for reading args from the commandline.
  82 # it automatically handles -a b and -a=b variants, and returns 1 if
  83 # we need to shift $3.
  84 read_arg() {
  85     # $1 = arg name
  86     # $2 = arg value
  87     # $3 = arg parameter
  88     param="$1"
  89     local rematch='^[^=]*=(.*)$' result
  90     if [[ $2 =~ $rematch ]]; then
  91         read "$param" <<< "${BASH_REMATCH[1]}"
  92     else
  93         for ((i=3; $i <= $#; i++)); do
  94             # Only read next arg if it not an arg itself.
  95             if [[ ${@:$i:1} = -* ]];then
  96                 break
  97             fi
  98             result="$result ${@:$i:1}"
  99             # There is no way to shift our callers args, so
 100             # return "no of args" to indicate they should do it instead.
 101         done
 102         read "$1" <<< "$result"
 103         return $(($i - 3))
 104     fi
 105 }
 106
 107 # Helper functions to calculate ipconfig command line
 108 calc_netmask() {
 109     local prefix=$1
 110
 111     [ -z "$prefix" ] && return
 112     mask=$(echo "(2 ^ 32) - (2 ^ $prefix)" | bc -l)
 113     byte1=$(( mask >> 24 ))
 114     byte2=$(( mask >> 16 ))
 115     byte3=$(( mask >> 8 ))
 116     byte4=$(( mask & 0xff ))
 117     netmask=$(printf "%d.%d.%d.%d" $(( byte1 & 0xff )) $(( byte2 & 0xff )) $(( byte3 & 0xff )) $byte4);
 118
 119     echo $netmask
 120 }
 121
 122 ipconfig() {
 123     local interface=$1
 124     local iplink macaddr broadcast gateway ipaddr prefix netmask
 125
 126     iplink=$(ip addr show dev $interface | sed -n 's/ *inet \(.*\) brd.*/\1/p')
 127     macaddr=$(ip addr show dev $interface | sed -n 's/.*ether \(.*\) brd.*/\1/p')
 128     broadcast=$(ip addr show dev $interface | sed -n 's/.*brd \(.*\) scope.*/\1/p')
 129     gateway=$(ip route show dev $interface | sed -n 's/default via \([0-9\.]*\).*/\1/p')
 130
 131     ipaddr=${iplink%%/*}
 132     prefix=${iplink##*/}
 133     netmask=$(calc_netmask $prefix)
 134
 135     echo "${ipaddr}:${serveraddr}:${gateway}:${netmask}:${hostname}:${interface}:none::${macaddr}"
 136 }
 137
 138 is_xen_kernel() {
 139     local kversion=$1
 140     local root_dir=$2
 141     local cfg
 142
 143     for cfg in ${root_dir}/boot/config-$kversion $root_dir/lib/modules/$kversion/build/.config
 144     do
 145         test -r $cfg || continue
 146         grep -q "^CONFIG_XEN=y\$" $cfg
 147         return
 148     done
 149     test $kversion != "${kversion%-xen*}"
 150     return
 151 }
 152
 153
 154 # Taken over from SUSE mkinitrd
 155 default_kernel_images() {
 156     local regex kernel_image kernel_version version_version initrd_image
 157     local qf='%{NAME}-%{VERSION}-%{RELEASE}\n'
 158
 159     case "$(uname -m)" in
 160         s390|s390x)
 161             regex='image'
 162             ;;
 163         ppc|ppc64)
 164             regex='vmlinux'
 165             ;;
 166         i386|x86_64)
 167             regex='vmlinuz'
 168             ;;
 169         arm*)
 170             regex='[uz]Image'
 171             ;;
 172         aarch64)
 173             regex='Image'
 174             ;;
 175         *)  regex='vmlinu.'
 176             ;;
 177     esac
 178
 179     kernel_images=""
 180     initrd_images=""
 181     for kernel_image in $(ls $boot_dir \
 182             | sed -ne "\|^$regex\(-[0-9.]\+-[0-9]\+-[a-z0-9]\+$\)\?|p" \
 183             | grep -v kdump$ ) ; do
 184
 185         # Note that we cannot check the RPM database here -- this
 186         # script is itself called from within the binary kernel
 187         # packages, and rpm does not allow recursive calls.
 188
 189         [ -L "$boot_dir/$kernel_image" ] && continue
 190         [ "${kernel_image%%.gz}" != "$kernel_image" ] && continue
 191         kernel_version=$(/usr/bin/get_kernel_version \
 192                          $boot_dir/$kernel_image 2> /dev/null)
 193         initrd_image=$(echo $kernel_image | sed -e "s|${regex}|initrd|")
 194         if [ "$kernel_image" != "$initrd_image" -a \
 195              -n "$kernel_version" -a \
 196              -d "/lib/modules/$kernel_version" ]; then
 197                 kernel_images="$kernel_images $boot_dir/$kernel_image"
 198                 initrd_images="$initrd_images $boot_dir/$initrd_image"
 199         fi
 200     done
 201     for kernel_image in $kernel_images;do
 202         kernels="$kernels ${kernel_image#*-}"
 203     done
 204     for initrd_image in $initrd_images;do
 205         targets="$targets $initrd_image"
 206     done
 207     host_only=1
 208     force=1
 209 }
 210
 211 while (($# > 0)); do
 212     case ${1%%=*} in
 213         -f) read_arg feature_list "$@" || shift $?
 214             # Could be several features
 215             ;;
 216         -k) # Would be nice to get a list of images here
 217             read_arg kernel_images "$@" || shift $?
 218             for kernel_image in $kernel_images;do
 219                 kernels="$kernels ${kernel_image#*-}"
 220             done
 221             host_only=1
 222             force=1
 223             ;;
 224         -i) read_arg initrd_images "$@" || shift $?
 225             for initrd_image in $initrd_images;do
 226                 # Check if the initrd_image contains a path.
 227                 # if not, then add the default boot_dir
 228                 dname=`dirname $initrd_image`
 229                 if [ "$dname" == "." ]; then
 230                     targets="$targets $boot_dir/$initrd_image";
 231                 else
 232                     targets="$targets $initrd_image";
 233                 fi
 234             done
 235             ;;
 236         -b) read_arg boot_dir "$@" || shift $?
 237             if [ ! -d $boot_dir ];then
 238                 error "Boot directory $boot_dir does not exist"
 239                 exit 1
 240             fi
 241             ;;
 242         -t) read_arg tmp_dir "$@" || shift $?
 243             dracut_args="${dracut_args} --tmpdir $tmp_dir"
 244             ;;
 245         -M) read_arg map_file "$@" || shift $?
 246             ;;
 247         -A) host_only=0;;
 248         -B) skip_update_bootloader=1;;
 249         -v|--verbose) dracut_args="${dracut_args} -v";;
 250         -L) logfile=;;
 251         -h|--help) usage -n;;
 252         -m) read_arg module_list "$@" || shift $? ;;
 253         -u) read_arg domu_module_list "$@" || shift $?
 254             echo "mkinitrd: DomU modules not yet supported" ;;
 255         -d) read_arg rootfs "$@" || shift $?
 256             dracut_args="${dracut_args} --filesystems $rootfs" ;;
 257         -D) read_arg dhcp_if "$@" || shift $?
 258             dracut_cmdline="${dracut_cmdline} ip=${dhcp_if}:dhcp"
 259             ;;
 260         -I) read_arg static_if "$@" || shift $?
 261             dracut_cmdline="${dracut_cmdline} ip=$(ipconfig $static_if)":
 262             ;;
 263         -a) read_arg acpi_dsdt "$@" || shift $?
 264             echo "mkinitrd: custom DSDT not yet supported"
 265             exit 1
 266             ;;
 267         -s) read_arg boot_splash "$@" || shift $?
 268             echo "mkinitrd: boot splash not yet supported"
 269             exit 1
 270             ;;
 271         -V) echo "mkinitrd: vendor scipts are no longer supported"
 272             exit 1;;
 273         --dracut)
 274             read_arg dracut_cmd "$@" || shift $? ;;
 275         --version|-R)
 276             echo "mkinitrd: dracut compatibility wrapper"
 277             exit 0;;
 278         --force) force=1;;
 279         --quiet|-q) quiet=1;;
 280         *)  if [[ ! $targets ]]; then
 281             targets=$1
 282             elif [[ ! $kernels ]]; then
 283             kernels=$1
 284             else
 285             usage
 286             fi;;
 287     esac
 288     shift
 289 done
 290
 291 [[ $targets && $kernels ]] || default_kernel_images
 292 [[ $targets && $kernels ]] || (error "No kernel found in $boot_dir" && usage)
 293
 294 # We can have several targets/kernels, transform the list to an array
 295 targets=( $targets )
 296 [[ $kernels ]] && kernels=( $kernels )
 297
 298 [[ $logfile ]]        && dracut_args="${dracut_args} --logfile $logfile"
 299 [[ $host_only == 1 ]] && dracut_args="${dracut_args} --hostonly"
 300 [[ $force == 1 ]]     && dracut_args="${dracut_args} --force"
 301 [[ $dracut_cmdline ]] && dracut_args="${dracut_args} --kernel-cmdline ${dracut_cmdline}"
 302 [ -z "$(type -p update-bootloader)" ] && skip_update_bootloader=1
 303
 304 # Update defaults from /etc/sysconfig/kernel
 305 if [ -f /etc/sysconfig/kernel ] ; then
 306     . /etc/sysconfig/kernel
 307 fi
 308 [[ $module_list ]] || module_list="${INITRD_MODULES}"
 309 basicmodules="$basicmodules ${module_list}"
 310 [[ $domu_module_list ]] || domu_module_list="${DOMU_INITRD_MODULES}"
 311 [[ $acpi_dsdt ]] || acpi_dsdt="${ACPI_DSDT}"
 312
 313 echo "Creating: target|kernel|dracut args|basicmodules "
 314 for ((i=0 ; $i<${#targets[@]} ; i++)); do
 315
 316     if [[ $img_vers ]];then
 317         target="${targets[$i]}-${kernels[$i]}"
 318     else
 319         target="${targets[$i]}"
 320     fi
 321     kernel="${kernels[$i]}"
 322
 323     # Duplicate code: No way found how to redirect output based on $quiet
 324     if [[ $quiet == 1 ]];then
 325         echo "$target|$kernel|$dracut_args|$basicmodules"
 326         if is_xen_kernel $kernel $rootfs ; then
 327             basicmodules="$basicmodules ${domu_module_list}"
 328         fi
 329         if [[ $basicmodules ]]; then
 330             $dracut_cmd $dracut_args --add-drivers "$basicmodules" "$target" \
 331                 "$kernel" &>/dev/null
 332         else
 333             $dracut_cmd $dracut_args "$target" "$kernel" &>/dev/null
 334         fi
 335     else
 336         if is_xen_kernel $kernel $rootfs ; then
 337             basicmodules="$basicmodules ${domu_module_list}"
 338         fi
 339         if [[ $basicmodules ]]; then
 340             $dracut_cmd $dracut_args --add-drivers "$basicmodules" "$target" \
 341                 "$kernel"
 342         else
 343             $dracut_cmd $dracut_args "$target" "$kernel"
 344         fi
 345     fi
 346 done
 347
 348 if [ "$skip_update_bootloader" ] ; then
 349     echo 2>&1 "Did not refresh the bootloader. You might need to refresh it manually."
 350 else
 351     update-bootloader --refresh
 352 fi