dracut/modules.d/90mdraid/check

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

# No mdadm?  No mdraid support.
type -P mdadm >/dev/null || exit 1

. $dracutfunctions
[[ $debug ]] && set -x

is_mdraid() { [[ -d "/sys/dev/block/$1/md" ]]; }

[[ $1 = '-h' ]] && {
    rootdev=$(find_root_block_device)
    if [[ $rootdev ]]; then
        # root lives on a block device, so we can be more precise about 
        # hostonly checking
        check_block_and_slaves is_mdraid "$rootdev" || exit 1
    else
        # root is not on a block device, use the shotgun approach
        blkid | egrep -q '(linux|isw)_raid' || exit 1
    fi
}

exit 0