111 lines
2.5 KiB
Bash
111 lines
2.5 KiB
Bash
#!/bin/bash
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#
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# kpartx_id
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#
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# Generates ID information for device-mapper tables.
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#
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# Copyright (C) 2006 SUSE Linux Products GmbH
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# Author:
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# Hannes Reinecke <hare@suse.de>
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#
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation version 2 of the License.
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#
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# This script generates ID information used to generate persistent symlinks.
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# It relies on the UUID strings generated by the various programs; the name
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# of the tables are of no consequence.
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#
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# Please note that dmraid does not provide the UUIDs (yet); a patch has been
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# sent upstream but has not been accepted yet.
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#
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DMSETUP=/sbin/dmsetup
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MAJOR=$1
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MINOR=$2
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if [ -z "$MAJOR" -o -z "$MINOR" ]; then
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echo "usage: $0 major minor"
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exit 1;
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fi
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# Device-mapper not installed; not an error
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if [ ! -x $DMSETUP ] ; then
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exit 0
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fi
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# Get the table info
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tblinfo=$($DMSETUP info -c --noheadings -o name,uuid -j $MAJOR -m $MINOR)
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if [ $? -ne 0 ] || [ -z "$tblinfo" ]; then
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exit $?
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fi
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set -- $(IFS=":"; echo $tblinfo)
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tblname=$1
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tbluuid=$2
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if [ -z "$tbluuid" ] ; then
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exit 0
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fi
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# Table UUIDs are always '<type>-<uuid>'.
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dmuuid=${tbluuid#*-}
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dmtbl=${tbluuid%%-*}
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dmpart=${dmtbl#part}
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# kpartx types are 'part<num>'
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if [ "$dmpart" == "$dmtbl" ] ; then
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dmpart=
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else
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dmtbl=part
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fi
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# Set the name of the table. We're only interested in dmraid,
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# multipath, and kparts tables; everything else is ignored.
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if [ "$dmtbl" == "part" ] ; then
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# The name of the kpartx table is the name of the parent table
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dmname=$($DMSETUP info -c --noheadings -o name -u $dmuuid)
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# We need the dependencies of the parent table to figure out
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# the type if the parent is a multipath table
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case "$dmparent" in
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mpath-*)
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dmdeps=$($DMSETUP deps -u $dmuuid)
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;;
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esac
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elif [ "$dmtbl" == "mpath" ] ; then
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dmname=$tblname
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# We need the dependencies of the table to figure out the type
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dmdeps=$($DMSETUP deps -u $tbluuid)
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elif [ "$dmtbl" == "dmraid" ] ; then
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dmname=$tblname
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fi
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if [ -z "$dmname" ] ; then
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exit 0
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fi
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echo "ID_DM_TABLE=$dmtbl"
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echo "ID_DM_NAME=$dmname"
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[ -n "$dmpart" ] && echo "ID_DM_PART=$dmpart"
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# Figure out the type of the map. For non-multipath maps it's
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# always 'raid'.
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if [ -n "$dmdeps" ] ; then
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case "$dmdeps" in
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*\(94,*)
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echo "ID_DM_TYPE=dasd"
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;;
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*\(9*)
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echo "ID_DM_TYPE=raid"
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;;
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*)
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echo "ID_DM_TYPE=scsi"
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;;
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esac
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else
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echo "ID_DM_TYPE=raid"
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fi
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exit 0
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