mod-dmraid.sh

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