mod-dmraid.sh

   1 #!/bin/sh
   2 RCSID='$Revision$ $Date::                            $'
   3
   4 # geninitrd mod: dmraid
   5 USE_DMRAID=${USE_DMRAID:-yes}
   6
   7 # if we should init dmraid at boot
   8 have_dmraid=no
   9
  10 # setup geninitrd module
  11 # @access       public
  12 setup_mod_dmraid() {
  13         dmraid=$(find_tool $initrd_dir/dmraid /sbin/dmraid-initrd)
  14         if [ ! -x /sbin/dmraid ] || [ ! -x "$dmraid" ]; then
  15                 USE_DMRAID=no
  16         fi
  17
  18         if [ "$kernel_version" -lt "002006" ]; then
  19                 USE_DMRAID=no
  20         fi
  21 }
  22
  23 # return true if dmraid is set on $devpath
  24 # @param        string $devpath device node to be examined
  25 # @access       public
  26 is_dmraid() {
  27         local devpath="$1"
  28
  29         # dmraid disabled
  30         if ! is_yes "$USE_DMRAID"; then
  31                 return 1
  32         fi
  33
  34         if ! is_yes "$(echo "$devpath" | awk '/^\/dev\/mapper\/(sil|hpt37x|hpt45x|isw|lsi|nvidia|pdc|sil|via|dos)_/ { print "yes"; }')"; then
  35                 return
  36         fi
  37 }
  38
  39 # find dmraid modules for $devpath
  40 # @param        $devpath        device to be examined
  41 # @return       false if $devpath is not on dmraid
  42 # @access       public
  43 find_modules_dmraid() {
  44         local devpath="$1"
  45
  46         # get blockdev itself (without partition)
  47         # /dev/mapper/sil_ahbgadcbchfc3 -> /dev/mapper/sil_ahbgadcbchfc
  48         local blockdev=${devpath%%[0-9]*}
  49         local raidname=${blockdev#/dev/mapper/}
  50         local found=0
  51
  52         local dev phydevs=$(dmraid -r -cdevpath,raidname | awk -F, -vv="$raidname" '{if ($2 == v) print $1}')
  53         for dev in $phydevs; do
  54                 find_modules_for_devpath $dev
  55                 lvm_ignore_devices="$lvm_ignore_devices $dev"
  56                 found=1
  57         done
  58
  59         if [ $found = 0 ]; then
  60                 return 1
  61         fi
  62
  63         find_module "dm-mirror"
  64         have_dmraid=yes
  65         return 0
  66 }
  67
  68 # generate initrd fragment for dmraid
  69 # @access       public
  70 initrd_gen_dmraid() {
  71         if ! is_yes "$have_dmraid"; then
  72                 return
  73         fi
  74
  75         inst_d /sbin
  76         inst_exec $dmraid /sbin/dmraid
  77
  78         mount_dev
  79         mount_sys
  80         initrd_gen_devices
  81         add_linuxrc <<-EOF
  82                 # 2 secs was enough for my system to initialize.
  83                 # XXX: shouldn't just call 'udevadm settle' ?
  84                 usleep 2000000
  85                 : 'Activating Device-Mapper RAID(s)'
  86                 /sbin/dmraid -ay -i
  87
  88                 debugshell
  89         EOF
  90 }