mdadm/mkinitrd-boot.sh

#!/bin/bash
#%stage: softraid
#%programs: /sbin/mdadm /sbin/mdmon
#%modules: raid0 raid1 raid10 raid456
#%if: -n "$need_mdadm"
#
##### MD (Software-)Raid
##
## This activates and waits for an MD software raid.
##
## Command line parameters
## -----------------------
##
## need_mdadm=1		use MD raid
## md_uuid		the uuid of the raid to activate
## 

# load the necessary module before we initialize the raid system
load_modules

# put the mdmon socked and pid file to /dev/.mdadm
rm -rf /var/run/mdadm
mkdir -p /var/run
ln -s /dev/.mdadm /var/run/mdadm
mkdir -p /dev/.mdadm
[ "$mduuid" ] && md_uuid="$mduuid"

md_major=$(sed -ne 's/\s*\([0-9]\+\)\s*md$/\1/p' /proc/devices)
if [ -n "$md_major" -a "$md_major" = "$maj" ]; then
    md_minor="$min"
    md_dev="/dev/md$md_minor"
fi

# Always start md devices read/only. They will get set to rw as soon
# as the first write occurs. This way we can guarantee that no
# restore occurs before resume.
if [ -f /sys/module/md_mod/parameters/start_ro ]; then
    echo 1 > /sys/module/md_mod/parameters/start_ro
fi

md_assemble()
{
	local dev=$1 mdconf container

	if test -e "$dev"; then
		return
	fi
	case "$dev" in
	/dev/md[0-9]*p[0-9]*)
		dev=${dev%p[0-9]*}
	esac
	if test -f /etc/mdadm.conf; then
		mdconf="-c /etc/mdadm.conf"
		container=$( \
			sed -rn "s:^ARRAY +$dev .*container=([^ ]*).*:\\1:p" \
			/etc/mdadm.conf)
	else
		mdconf="-c partitions"
	fi
	case "$container" in
	"")
		;;
	/dev/*)
		mdadm -A $mdconf $container
		;;
	[0-9a-f]*[0-9a-f])
		mdadm -A $mdconf --uuid="$container" /dev/md/container
		;;
	*)
		echo "unrecognized container for $dev: $container"
		;;
	esac
	mdadm -A $mdconf $mdarg "$dev"
}

if [ -n "$need_mdadm" ]; then
	
	if [ -n "$md_uuid" ] ; then
	    mdarg="--uuid=$md_uuid"
	fi
	
	case $resumedev in
	/dev/md*)
		md_assemble "$resumedev"
	esac
	
	if [ -n "$md_dev" ] ; then
		md_assemble "$md_dev"
	fi
	for dev in $md_devs; do
		md_assemble "$dev"
	done
	wait_for_events
fi