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