Attachment 227827 Details for Bug 397816

activate_dm_linear

activate_dm_linear (text/plain), 1.71 KB, created by Hannes Reinecke on 2008-07-15 11:20:36 UTC

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Creator: Hannes Reinecke

Created: 2008-07-15 11:20:36 UTC

Size: 1.71 KB

patch

obsolete

>#!/bin/sh
>#
># activate_dm_linear
>#
># Activate a linear mapping on top of an existing block device.
># This allows for partitions to be mapped via kpartx, so all
># partitions on a device can be accessed.
>#
>
>RULE=/etc/udev/rules.d/62-dm_linear.rules
>
>if [ -z "$1" ] ; then
>    echo "Usage: $0 [-d] devname"
>    exit 1
>fi
>
>if [ "$1" == "-d" ] ; then
>    remove_only=1
>    shift
>fi
>
>if [ ! -b "$1" ] ; then
>    echo "$1 is not a block device"
>    exit 1
>fi
>
>dev=${1#/dev/}
>
>if [ ! -d /sys/block/$dev ] ; then
>    echo "$1 is not a disk device"
>    exit 1
>fi
>
>blksize=$(/sbin/blockdev --getsize $1)
>if [ $? -ne 0 ] ; then
>    echo "blockdev --getsize $1 failed: $?"
>    exit 1
>fi
>
>for link in $(udevinfo -q symlink -p /block/$dev) ; do
>    case "$link" in
>	*/by-id/ata*)
>            atalink=${link#*/by-id/ata-}
>	    ;;
>	*/by-id/scsi*)
>	    scsilink=${link#*/by-id/scsi-}
>	    ;;
>    esac
>done
>if [ "$atalink" ] ; then
>    # Remove existing rules
>    echo "/$atalink/d
>w
>q
>" | ed $RULE > /dev/null 2>&1
>    [ "$remove_only" = 1 ] && exit 0
>    cat >> $RULE <<EOF
>ACTION=="add", KERNEL=="sd*[!0-9]", ENV{ID_VENDOR}=="ATA", ENV{ID_ATA_COMPAT}=="$atalink", RUN+="/bin/bash -c 'echo 0 $blksize linear \$major:\$minor 0 | /sbin/dmsetup create ata-\$env{ID_ATA_COMPAT} -u linear-ata-\$env{ID_ATA_COMPAT}'"
>EOF
>fi
>if [ "$scsilink" ] ; then
>    # Remove existing rules
>    echo "/$scsilink/d
>w
>q
>" | ed $RULE > /dev/null 2>&1
>    [ "$remove_only" = 1 ] && exit 0
>    # And create a new one
>    cat >> $RULE <<EOF
>ACTION=="add", KERNEL=="sd*[!0-9]", ENV{ID_BUS}=="scsi", ENV{ID_SERIAL}=="$scsilink", RUN+="/bin/bash -c 'echo 0 $blksize linear \$major:\$minor 0 | /sbin/dmsetup create \$env{ID_BUS}-\$env{ID_SERIAL} -u linear-\$env{ID_BUS}-\$env{ID_SERIAL}'"
>EOF
>fi

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