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dmraid-activate
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2009-10-06
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#!/bin/sh
#
# dmraid-activate: Script to reformat the output of dmraid to be useful with
# udev.
#
# (c) 2008 Canonical Ltd.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# Arguments: $1 = Name of array you want activated.
activate_array ()
{
Raid_Setinfo=$(dmraid -i -si "$1")
if [ -z "$Raid_Setinfo" ]; then
log_error "Cannot retrieve RAID set information for $1"
return 1
fi
Raid_Type=$(dmraid -i -si -ct "$1")
Raid_Nodevs=$(dmraid -i -si -cd "$1")
case "$Raid_Type" in
stripe)
if [ "$Raid_Nodevs" -lt 2 ]; then
if [ -n "$Degraded" ]; then
log_error "Cannot bring up a RAID0 array in degraded mode, not all devices present."
fi
return 2
fi
;;
mirror)
if [ "$Raid_Nodevs" -lt 2 ]; then
if [ -z "$Degraded" ]; then
log_error "Raid set $Raid_Name is degraded. Not activating"
return 2
else
log_warning "Activating $Raid_Name in degraded mode"
Return_Val=3
fi
fi
;;
raid5_*)
modprobe -q dm_raid45
if [ "$Raid_Nodevs" -lt 3 ]; then
if [ -z "$Degraded" ]; then
log_error "Raid set $Raid_Name is degraded. Not activating"
return 2
else
log_warning "Activating $Raid_Name in degraded mode"
Return_Val=3
fi
fi
;;
esac
# At this point we have the required number of devs, or the user wants the
# array brought up in degraded mode, except in the case of striped arrays.
dmraid -i -ay -Z "$1"
return $Return_Val
}
log_warning()
{
if type logger > /dev/null ; then
logger -t dmraid-activate "WARNING: $1"
else
echo "dmraid-activate: WARNING: $1"
fi
}
log_error()
{
if type logger > /dev/null ; then
logger -t dmraid-activate "ERROR: $1"
else
echo "dmraid-activate: ERROR: $1"
fi
}
if grep -qs "\<nodmraid\>" /proc/cmdline; then
log_warning "dmraid disabled by boot option"
exit 0
fi
modprobe -q dm_mod
if [ -z "$1" ] || [ "$1" = "--degraded" ] && [ "$#" -lt 2 ]; then
echo "Node name not specified." >&2
exit 1
fi
if [ "$1" = "--degraded" ]; then
Degraded=1
Node_Name=$2
else
Node_Name=$1
fi
Raid_Name=$(dmraid -i -r -cr /dev/$Node_Name | grep -vi "No RAID disks" | grep -vi "formats discovered")
if [ -z "$Raid_Name" ]; then
exit 0
fi
# We need a special case for isw arrays, since it is possible to have several
# subsets of a RAID group, of varying RAID types.
case "$Raid_Name" in
isw_*)
Isw_Group_Name=$Raid_Name
Isw_Subsets=$(dmraid -i -n "/dev/$Node_Name" | grep volume | sed 's/.*volume: " *\(.*\)"$/\1/')
for isw_subset in $Isw_Subsets
do
activate_array "${Isw_Group_Name}_${isw_subset}"
done
break
;;
*)
activate_array "$Raid_Name"
break
;;
esac
exit $Return_Val