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