mod-dmraid.sh

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