mdadm/mkinitrd-boot.sh

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#!/bin/bash
#%stage: softraid
# grep needed for udev rules file.
#%programs: /sbin/mdadm /sbin/mdmon
#%modules: raid0 raid1 raid10 raid456
#%if: -n "$need_mdadm"
#
##### MD (Software-)Raid
##
## This activates and waits for an MD software raid.
##
## Command line parameters
## -----------------------
##
## need_mdadm=1 use MD raid
##
# load the necessary module before we initialize the raid system
load_modules
# Create dir for socket and pid files
mkdir -p /run/mdadm
[ "$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
if test -n "$debug_linuxrc"; then
mdadm="mdadm -v"
else
mdadm="mdadm"
fi
# uuid -> array name
get_md_name()
{
local uuid=$1 res
if ! test -f /etc/mdadm.conf; then
return 1
fi
res=$(sed -rn "s/^ARRAY +([^ ]+).* UUID=$uuid.*/\1/p" /etc/mdadm.conf)
case "$res" in
"" | \<* | *=*)
return 1
;;
/*)
echo "$res"
;;
*)
echo "/dev/md/$res"
;;
esac
return 0
}
md_assemble()
{
local dev=$1 uuid mdconf container container_name
if test -e "$dev"; then
return
fi
case "$dev" in
/dev/md[0-9]*p[0-9]*)
dev=${dev%p[0-9]*}
;;
/dev/md*)
;;
/dev/disk/by-id/md-uuid-*)
uuid=${dev#/dev/disk/by-id/md-uuid-}
uuid=${uuid%-part*}
dev=
;;
*)
return
esac
if test -f /etc/mdadm.conf; then
mdconf="-c /etc/mdadm.conf"
local line
if test -n "$dev"; then
line=$(sed -rn "\:^ARRAY +$dev :p" /etc/mdadm.conf)
else
line=$(sed -rn "/^ARRAY .* UUID=$uuid/p" /etc/mdadm.conf)
fi
container=$(echo "$line" | \
sed -rn 's/.* container=([^ ]*).*/\1/p')
else
mdconf="-c partitions"
fi
case "$container" in
"")
;;
/dev/*)
$mdadm -A $mdconf $container
;;
[0-9a-f]*[0-9a-f])
container_name=$(get_md_name "$container")
if test -z "$container_name"; then
container_name=/dev/md/container
fi
$mdadm -A $mdconf --uuid="$container" "$container_name"
;;
*)
echo "unrecognized container for $dev: $container"
esac
if test -n "$dev"; then
$mdadm -A $mdconf "$dev"
else
dev=$(get_md_name "$uuid")
if test -z "$dev"; then
# mdadm will pick a device name
$mdadm -A $mdconf --uuid=$uuid
else
$mdadm -A $mdconf --uuid=$uuid "$dev"
fi
fi
}
md_assemble "$resumedev"
md_assemble "$rootdev"
if [ -n "$md_dev" ] ; then
md_assemble "$md_dev"
fi
# assemble any md devices seen by setup-md.sh at initrd build time
for dev in $md_devs; do
md_assemble "$dev"
done
wait_for_events