#RAID2 hook for mkinitcpio

r2_am ()
{
        modprobe -q "${1}" >/dev/null 2>&1
        eval "${1}=1"
}

run_hook ()
{
        ## 1) discover which modules are actually needed
        fil=/etc/mdadm.conf
        if [ ! -f "${fil}" ] ; then
                #If user didn't supply proper mdadm.conf, create one.
                #Partitions in this case will be assembled as partitionable,
                #user SHOULD provide proper mdadm.conf for their system and
                #rebuild initramfs afterwards.
                echo "CREATE mode=0660 owner=0 group=6 auto=part16 symlinks=yes" >"${fil}"
                mdadm -Es >>"${fil}"
        fi
        while read dat ; do
                #get raid type per device
                lev="${dat##*level=}"
                lev="${lev%% metadata*}"
                #and load required module
                case "${lev}" in
                        raid0     ) [ -z "${raid0}" ] && r2_am raid0 ;;
                        raid1     ) [ -z "${raid1}" ] && r2_am raid1 ;;
                        raid4     ) [ -z "${raid456}" ] && r2_am raid456 ;;
                        raid5     ) [ -z "${raid456}" ] && r2_am raid456 ;;
                        raid6     ) [ -z "${raid456}" ] && r2_am raid456 ;;
                        linear    ) [ -z "${linear}" ] && r2_am linear ;;
                        multipath ) [ -z "${multipath}" ] && r2_am multipath ;;
                        faulty    ) [ -z "${faulty}" ] && r2_am faulty ;;
                esac
        done <"${fil}"
        ## 2) modules ready, now assembly
        # things to watch out for:
        # raid-partitions require access to device, to make linux actually
        # notice exisitng partitions. Without that, there will be no uevents
        # right after (dis)assembly, and lvm using sysfs will not check them
        # for lvm volumes (unless sysfs_scan = 0). The easiest thing to do
        # that, is just to run mdadm -As twice.
        # Neil knows about it, and according to him, current mdadm (2.6.4)
        # doesn't do mentioned access in one case. It should get fixed in
        # one of the future versions. If udev rules access device later
        # while processing the rules, i.e. through vol_id helper,
        # it would "self" trigger partitions uevents.
        # Either way, it's safer to just do it explicitely.

        /sbin/mdadm -As >/dev/null 2>&1
        /sbin/mdadm -As >/dev/null 2>&1
}

#RAID2 install for mkinitcpio

install ()
{
    MODULES=" $(checked_modules "drivers/md/*" | grep -v "dm-") "
    BINARIES="mdadm"
    FILES=""
    SCRIPT="raid2"
    add_dir "/dev/md"
    add_file "/etc/mdadm.conf"
}

help ()
{
cat<<HELPEOF
  This hook is responsible for raid initialisation. It supports both
  partitionable and non-partitionable arrays.

  Proper mdadm.conf SHOULD be included. If it's not, all raid devices
  will be detected during run and assembled as partitionable devices.
  User should rebuild initramfs with proper mdadm.conf.
HELPEOF
}


#small lvm diff

--- lvm2_hook   2008-01-05 14:21:14.000000000 +0100
+++ lvm2        2008-01-05 14:21:30.000000000 +0100
@@ -3,13 +3,11 @@
 {
     /sbin/modprobe -q dm-mod >/dev/null 2>&1
     if [ -e "/sys/class/misc/device-mapper" ]; then
-        read dev_t < /sys/class/misc/device-mapper/dev
-        /bin/mknod "/dev/mapper/control" c $(/bin/replace "${dev_t}" ':')

         [ "${quiet}" = "y" ] && LVMQUIET=">/dev/null"

         msg "Scanning logical volumes..."
-        eval /bin/lvm vgscan --ignorelockingfailure $LVMQUIET
+        eval /bin/lvm vgscan --mknodes --ignorelockingfailure $LVMQUIET
         msg "Activating logical volumes..."
         eval /bin/lvm vgchange --ignorelockingfailure -ay $LVMQUIET
     fi