mod-dmraid.sh

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