create_xml_data: new xml metadata creation tool

thin-provisioning/create_xml_data

@@ -0,0 +1,124 @@
+#!/usr/bin/env ruby
+#
+# Copyright (C) 2013 Red Hat, GmbH
+# 
+# Simple XML metadata creation tool
+#
+
+require 'optparse'
+require 'pathname'
+
+#----------------------------------------------------------------
+
+$prg = Pathname.new($0).basename
+
+def init_units
+  units = {}
+  units[:bytes_per_sector] = 512
+  units[:chars] = "bsKkMmGgTtPpEeZzYy"
+  units[:strings] = [ 'bytes', 'sectors',
+                      'kilobytes', 'kibibytes', 'megabytes',  'mebibytes',
+                      'gigabytes', 'gibibytes', 'terabytes',  'tebibytes',
+                      'petabytes', 'pebibytes', 'exabytes',   'ebibytes',
+                      'zetabytes', 'zebibytes', 'yottabytes', 'yobibytes' ]
+  units[:factors] = [ 1, units[:bytes_per_sector] ]
+  1.step(8) { |e| units[:factors] += [ 1024**e, 1000**e ] }
+  units
+end
+
+def get_index(unit_char, units)
+  unit_char ? units[:chars].index(unit_char) : 1
+end
+
+def to_sectors(size, units)
+  a = size.split(/[#{units[:chars]}]/)
+  s = size.to_i.to_s
+  abort "#{$prg} - only one unit character allowed!" if a.length > 1 || size.length - s.length > 1
+  abort "#{$prg} - invalid unit specifier!" if s != a[0]
+  size.to_i * units[:factors][get_index(size[a[0].length], units)] / units[:bytes_per_sector]
+end
+
+def check_opts(opts)
+  abort "#{$prg} - 3 arguments required!" if opts.length < 3
+  abort "#{$prg} - size must be much greater/equal blocksize" if opts[:thinsize] < opts[:blocksize]
+  abort "#{$prg} - number of thin provisioned devices or snapshots must be > 0" if opts[:thins].nil? || opts[:thins] == 0
+end
+
+def parse_command_line(argv, units)
+  opts = {}
+
+  os = OptionParser.new do |o|
+    o.banner = "Thin Provisioning XML Test Metadata Generator.\nUsage: #{$prg} [opts]"
+    o.on("-b", "--block-size BLOCKSIZE[#{units[:chars]}]", String,
+         "Block size of thin provisioned devices.") do |bs|
+      opts[:blocksize] = to_sectors(bs, units)
+    end
+    o.on("-s", "--thin-size SIZE[#{units[:chars]}]", String, "Average size of thin devices and snapshots.") do |sz|
+      opts[:thinsize] = to_sectors(sz, units)
+    end
+    o.on("-r", "--range-mappings", "Create range mappings") do
+      opts[:range] = true
+    end
+    o.on("-t", "--thins #THINS", Integer, "Sum of thin devices and snapshots.") do |mt|
+      opts[:thins] = mt
+    end
+    o.on("-h", "--help", "Output this help.") do
+      puts o
+      exit
+    end
+  end
+
+  begin
+    os.parse!(argv)
+  rescue OptionParser::ParseError => e
+    abort "#{$prg} #{e}\n#{$prg} #{os}"
+  end
+
+  check_opts(opts)
+  opts
+end
+
+def begin_superblock(blocksize, nr_data_blocks)
+  "<superblock uuid=\"\" time=\"0\" transaction=\"0\" data_block_size=\"#{blocksize}\" nr_data_blocks=\"#{nr_data_blocks}\">\n"
+end
+
+def end_superblock
+  "</superblock>\n"
+end
+
+def begin_device(devid, size)
+  "  <device dev_id =\"#{devid}\" mapped_blocks=\"#{size}\" transaction=\"0\" creation_time=\"0\" snap_time=\"0\">\n"
+end
+
+def end_device
+  "  </device>\n"
+end
+
+def single_mapping(from, to = 4711)
+  "    <single_mapping time=\"0\" origin_block=\"#{from}\" data_block=\"#{to}\"/>\n"
+end
+
+def range_mapping(mapping, length)
+  "    <range_mapping time=\"0\" origin_begin=\"#{mapping}\" data_begin=.\"1169\" length=\"#{lenght}\"/>\n"
+end
+
+def xml_metadata(opts, units)
+  blocks, to = opts[:thinsize] / opts[:blocksize], 0
+
+  puts begin_superblock(opts[:blocksize], blocks)
+  0.step(opts[:thins] - 1) do |devid|
+    puts begin_device(devid, opts[:thinsize])
+    0.step(blocks - 1) do |from|
+      puts single_mapping(from, to)
+      to += 1
+    end
+    puts end_device
+  end
+  puts end_superblock
+end
+
+
+#----------------------------------------------------------------
+# Main
+#
+xml_metadata(parse_command_line(ARGV, (units = init_units)), units)

thin-provisioning/thin_metadata_size

@@ -95,7 +95,7 @@ end
 def estimated_result(opts, units)
   idx = get_index(opts[:units], units)
   # double-fold # of nodes, because they aren't fully populated in average
-  r = (1.0 + (2 * (opts[:poolsize] / opts[:blocksize] / mappings_per_block) + opts[:maxthins])) * 8 * units[:bytes_per_sector] # in bytes!
+  r = (1.0 + (2 * opts[:poolsize] / opts[:blocksize] / mappings_per_block + opts[:maxthins])) * 8 * units[:bytes_per_sector] # in bytes!
   r /= units[:factors][idx] # in requested unit
   tmp = "%.2f" % r
   if tmp.to_f > 0.0