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 # return true if dmraid is set on $devpath
  16 # @param        string $devpath device node to be examined
  17 # @access       public
  18 is_dmraid() {
  19         local devpath="$1"
  20
  21         # dmraid disabled
  22         if ! is_yes "$USE_DMRAID"; then
  23                 return 1
  24         fi
  25
  26         if ! is_yes "$(echo "$devpath" | awk '/^\/dev\/mapper\/(sil|hpt37x|hpt45x|isw|lsi|nvidia|pdc|sil|via|dos)_/ { print "yes"; }')"; then
  27                 return
  28         fi
  29 }
  30
  31 # find dmraid modules for $devpath
  32 # @param        $devpath        device to be examined
  33 # @return       false if $devpath is not on dmraid
  34 # @access       public
  35 find_modules_dmraid() {
  36         local devpath="$1"
  37
  38         # get blockdev itself (without partition)
  39         # /dev/mapper/sil_ahbgadcbchfc3 -> /dev/mapper/sil_ahbgadcbchfc
  40         local blockdev=${devpath%%[0-9]*}
  41         local raidname=${blockdev#/dev/mapper/}
  42         local found=0
  43
  44         local dev phydevs=$(dmraid -r -cdevpath,raidname | awk -F, -vv="$raidname" '{if ($2 == v) print $1}')
  45         for dev in $phydevs; do
  46                 find_modules_for_devpath $dev
  47                 lvm_ignore_devices="$lvm_ignore_devices $dev"
  48                 found=1
  49         done
  50
  51         if [ $found = 0 ]; then
  52                 return 1
  53         fi
  54
  55         find_module "dm-mirror"
  56         have_dmraid=yes
  57         return 0
  58 }
  59
  60 # generate initrd fragment for dmraid
  61 # @access       public
  62 initrd_gen_dmraid() {
  63         inst_d /sbin
  64         inst_exec $dmraid /sbin/dmraid
  65
  66         mount_dev
  67         mount_sys
  68         initrd_gen_devices
  69         add_linuxrc <<-EOF
  70                 # 2 secs was enough for my system to initialize.
  71                 # XXX: shouldn't just call 'udevadm settle' ?
  72                 usleep 2000000
  73                 : 'Activating Device-Mapper RAID(s)'
  74                 /sbin/dmraid -ay -i
  75
  76                 debugshell
  77         EOF
  78 }