dracut/modules.d/90mdraid/module-setup.sh

#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

check() {
    local _rootdev
    # No mdadm?  No mdraid support.
    type -P mdadm >/dev/null || return 1

    check_mdraid() {
        local dev=$1 fs=$2 holder DEVPATH MD_UUID
        [[ "$fs" = "${fs%%_raid_member}" ]] && return 1

        MD_UUID=$(/sbin/mdadm --examine --export $dev \
            | while read line; do
                [[ ${line#MD_UUID} = $line ]] && continue
                eval "$line"
                echo $MD_UUID
                break
                done)

        [[ ${MD_UUID} ]] || return 1
        if ! [[ $kernel_only ]]; then
            echo " rd.md.uuid=${MD_UUID} " >> "${initdir}/etc/cmdline.d/90mdraid.conf"
        fi
        return 0
    }

    [[ $hostonly ]] || [[ $mount_needs ]] && {
        for_each_host_dev_fs check_mdraid || return 1
    }

    return 0
}

depends() {
    echo rootfs-block
    return 0
}

installkernel() {
    instmods =drivers/md
}

install() {
    dracut_install cat
    dracut_install -o mdmon
    inst $(command -v partx) /sbin/partx
    inst $(command -v mdadm) /sbin/mdadm

     # XXX: mdmon really needs to run as non-root?
     #      If so, write only the user it needs in the initrd's /etc/passwd (and maybe /etc/group)
     #      in a similar fashion to modules.d/95nfs.  Do not copy /etc/passwd and /etc/group from
     #      the system into the initrd.
     #      dledford has hardware to test this, so he should be able to clean this up.
     # inst /etc/passwd
     # inst /etc/group

     inst_rules 64-md-raid.rules
     # remove incremental assembly from stock rules, so they don't shadow
     # 65-md-inc*.rules and its fine-grained controls, or cause other problems
     # when we explicitly don't want certain components to be incrementally
     # assembled
     sed -i -r -e '/RUN\+?="[[:alpha:]/]*mdadm[[:blank:]]+(--incremental|-I)[[:blank:]]+(\$env\{DEVNAME\}|\$tempnode)"/d' "${initdir}${udevdir}/rules.d/64-md-raid.rules"

    inst_rules "$moddir/65-md-incremental-imsm.rules"

    # guard against pre-3.0 mdadm versions, that can't handle containers
    if ! mdadm -Q -e imsm /dev/null &> /dev/null; then
        inst_hook pre-trigger 30 "$moddir/md-noimsm.sh"
    fi
    if ! mdadm -Q -e ddf /dev/null &> /dev/null; then
        inst_hook pre-trigger 30 "$moddir/md-noddf.sh"
    fi

    if [[ $hostonly ]] || [[ $mdadmconf = "yes" ]]; then
        if [ -f /etc/mdadm.conf ]; then
            inst /etc/mdadm.conf
        else
            [ -f /etc/mdadm/mdadm.conf ] && inst /etc/mdadm/mdadm.conf /etc/mdadm.conf
        fi
    fi

    inst_hook pre-udev 30 "$moddir/mdmon-pre-udev.sh"
    inst_hook pre-trigger 30 "$moddir/parse-md.sh"
    inst_hook pre-mount 10 "$moddir/mdraid-waitclean.sh"
    inst_hook shutdown 30 "$moddir/md-shutdown.sh"
    inst_script "$moddir/mdraid-cleanup.sh" /sbin/mdraid-cleanup
    inst_script "$moddir/mdraid_start.sh" /sbin/mdraid_start
}