docs: device-mapper: move it to the admin-guide

[linux-2.6-microblaze.git] / Documentation / device-mapper / linear.rst

diff --git a/Documentation/device-mapper/linear.rst b/Documentation/device-mapper/linear.rst
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--- a/Documentation/device-mapper/linear.rst
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-=========
-dm-linear
-=========
-
-Device-Mapper's "linear" target maps a linear range of the Device-Mapper
-device onto a linear range of another device.  This is the basic building
-block of logical volume managers.
-
-Parameters: <dev path> <offset>
-    <dev path>:
-       Full pathname to the underlying block-device, or a
-        "major:minor" device-number.
-    <offset>:
-       Starting sector within the device.
-
-
-Example scripts
-===============
-
-::
-
-  #!/bin/sh
-  # Create an identity mapping for a device
-  echo "0 `blockdev --getsz $1` linear $1 0" | dmsetup create identity
-
-::
-
-  #!/bin/sh
-  # Join 2 devices together
-  size1=`blockdev --getsz $1`
-  size2=`blockdev --getsz $2`
-  echo "0 $size1 linear $1 0
-  $size1 $size2 linear $2 0" | dmsetup create joined
-
-::
-
-  #!/usr/bin/perl -w
-  # Split a device into 4M chunks and then join them together in reverse order.
-
-  my $name = "reverse";
-  my $extent_size = 4 * 1024 * 2;
-  my $dev = $ARGV[0];
-  my $table = "";
-  my $count = 0;
-
-  if (!defined($dev)) {
-          die("Please specify a device.\n");
-  }
-
-  my $dev_size = `blockdev --getsz $dev`;
-  my $extents = int($dev_size / $extent_size) -
-                (($dev_size % $extent_size) ? 1 : 0);
-
-  while ($extents > 0) {
-          my $this_start = $count * $extent_size;
-          $extents--;
-          $count++;
-          my $this_offset = $extents * $extent_size;
-
-          $table .= "$this_start $extent_size linear $dev $this_offset\n";
-  }
-
-  `echo \"$table\" | dmsetup create $name`;