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- #!/bin/sh
- #
- # kpartx_id
- #
- # Generates ID information for device-mapper tables.
- #
- # Copyright (C) 2006 SUSE Linux Products GmbH
- # Author:
- # Hannes Reinecke <hare@suse.de>
- #
- #
- # 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 version 2 of the License.
- #
- # This script generates ID information used to generate persistent symlinks.
- # It relies on the UUID strings generated by the various programs; the name
- # of the tables are of no consequence.
- #
- # Please note that dmraid does not provide the UUIDs (yet); a patch has been
- # sent upstream but has not been accepted yet.
- #
-
- DMSETUP=/sbin/dmsetup
-
- MAJOR=$1
- MINOR=$2
- UUID=$3
-
- if [ -z "$MAJOR" -o -z "$MINOR" ]; then
- echo "usage: $0 major minor"
- exit 1;
- fi
-
- # Device-mapper not installed; not an error
- if [ ! -x $DMSETUP ] ; then
- exit 0
- fi
-
-
- # Table UUIDs are always '<type>-<uuid>'.
- dmuuid=${UUID#*-}
- dmtbl=${UUID%%-*}
- dmpart=${dmtbl#part}
- # kpartx types are 'part<num>'
- if [ "$dmpart" = "$dmtbl" ] ; then
- dmpart=
- else
- dmtbl=part
- fi
-
- # Set the name of the table. We're only interested in dmraid,
- # multipath, and kpartx tables; everything else is ignored.
- if [ "$dmtbl" = "part" ] ; then
- # The name of the kpartx table is the name of the parent table
- dmname=$($DMSETUP info -c --noheadings -o name -u $dmuuid)
- echo "DM_NAME=$dmname"
- # We need the dependencies of the parent table to figure out
- # the type if the parent is a multipath table
- case "$dmuuid" in
- mpath-*)
- dmdeps=$($DMSETUP deps -u $dmuuid)
- ;;
- esac
- elif [ "$dmtbl" = "mpath" ] ; then
- dmname=$tblname
- # We need the dependencies of the table to figure out the type
- dmdeps=$($DMSETUP deps -u $UUID)
- elif [ "$dmtbl" = "dmraid" ] ; then
- dmname=$tblname
- fi
-
- [ -n "$dmpart" ] && echo "DM_PART=$dmpart"
-
- # Figure out the type of the map. For non-multipath maps it's
- # always 'raid'.
- if [ -n "$dmdeps" ] ; then
- case "$dmdeps" in
- *\(94,*)
- echo "DM_TYPE=dasd"
- ;;
- *\(9*)
- echo "DM_TYPE=raid"
- ;;
- *)
- echo "DM_TYPE=scsi"
- ;;
- esac
- else
- echo "DM_TYPE=raid"
- fi
-
- exit 0
-