Documentation for the linear target.  The last 2 scripts still need
testing.
--- diff/Documentation/device-mapper/linear.txt	1970-01-01 01:00:00.000000000 +0100
+++ source/Documentation/device-mapper/linear.txt	2004-04-07 11:33:29.378925920 +0100
@@ -0,0 +1,48 @@
+The linear target maps a linear range of the device mapper device on
+to a linear range of another device.  This is the basic building block
+of logical volume managers.
+
+Parameters: <devpath> <offset>
+
+[[
+#!/bin/sh
+# Create an identity mapping for a device
+dmsetup create identity <<EOF
+0 `blockdev --getsize $1` linear $1 0
+EOF
+]]
+
+[[
+#!/bin/sh
+# Join 2 devices together
+size1=`blockdev --getsize $1`
+size2=`blockdev --getsize $2`
+dmsetup create joined <<EOF
+0 $size1 linear $1 0
+$size1 `expr $size1 + $size2` linear $2 0
+EOF
+]]
+
+[[
+#!/bin/sh
+# Split a device into 4M chunks, and then join them together in
+# reverse order
+size=`blockdev --getsize $1`
+table=""
+extent=8196
+count=`expr $size / $extent`
+lcount=0
+while [ $count -g 0 ]
+do
+	lstart=`expr $lcount * $extent`
+	lcount=`expr $lcount + 1`
+
+	end=`expr $count * $extent`
+	count=`expr $count - 1`
+	start=`expr $count * $extent`
+
+	foo="$foo\n$lstart $end linear $1 $start"
+done
+
+echo $table | dmsetup create reversed
+]]
