102 lines
3.2 KiB
Ruby
Executable File
102 lines
3.2 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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#
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# Copyright (C) 2013 Red Hat, GmbH
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#
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# Simple thinp provisioning XML metadata creation tool
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#
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require 'optparse'
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require 'pathname'
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#----------------------------------------------------------------
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$prg = Pathname.new($0).basename
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def check_opts(opts)
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abort "#{$prg} - 3 arguments required!" if opts.length < 3
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abort "#{$prg} - block size must be 2^^N with N > 1" if opts[:blocksize] < 2 || (opts[:blocksize] & opts[:blocksize] - 1)
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abort "#{$prg} - mappings must be > 0" if opts[:mappings] < 1
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abort "#{$prg} - number of thin provisioned devices or snapshots must be > 0" if opts[:thins].nil? || opts[:thins] < 1
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abort "#{$prg} - size variation too large!" if !opts[:variation].nil? && (opts[:mappings] < 2 || (opts[:variation] >= 2 * (opts[:mapings] - 1)))
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end
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def parse_command_line(argv)
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opts = {}
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os = OptionParser.new do |o|
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o.banner = "Thin Provisioning XML Test Metadata Generator.\nUsage: #{$prg} [opts]"
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o.on("-b", "--block-size #SECTORS", Integer, "Block size of thin provisioned devices in sectors.") { |bs| opts[:blocksize] = bs }
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o.on("-m", "--mappings #MAPPINGS", Integer, "Number of mappings per thin device or snapshot.") { |m| opts[:mappings] = m }
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o.on("-r", "--range-mappings", "Create range mappings") { opts[:range] = true }
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o.on("-t", "--thin-devices #THINS", Integer, "Sum of thin devices and snapshots.") { |mt| opts[:thins] = mt }
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o.on("-v", "--variations SIZE]", Integer, "Mapping variation of thin devices and snapshots.") { |mv| opts[:variation] = mv }
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o.on("-h", "--help", "Output this help.") { puts o; exit }
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end
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begin
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os.parse!(argv)
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rescue OptionParser::ParseError => e
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abort "#{$prg} #{e}\n#{$prg} #{os}"
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end
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check_opts(opts)
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opts
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end
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def begin_superblock(blocksize, nr_data_blocks)
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"<superblock uuid=\"\" time=\"0\" transaction=\"1\" data_block_size=\"#{blocksize}\" nr_data_blocks=\"#{nr_data_blocks}\">"
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end
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def end_superblock
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"</superblock>"
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end
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def begin_device(devid, size)
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" <device dev_id=\"#{devid}\" mapped_blocks=\"#{size}\" transaction=\"0\" creation_time=\"0\" snap_time=\"0\">"
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end
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def end_device
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" </device>"
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end
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def single_mapping(from, to)
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" <single_mapping origin_block=\"#{from}\" data_block=\"#{to}\" time=\"1\"/>"
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end
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def range_mapping(from, to, length)
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" <range_mapping origin_begin=\"#{from}\" data_begin=\"#{to}\" length=\"#{length}\" time=\"1\"/>"
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end
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def this_mappings(opts)
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opts[:variation].nil? ? opts[:mappings] : ((2 * opts[:mappings] - rand(opts[:variation])) / 2)
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end
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def xml_metadata(opts)
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mappings, dev_id, nr_data_blocks, to = [], 0, 0, 0
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0.step(opts[:thins] - 1) do
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mappings << (m = this_mappings(opts))
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nr_data_blocks += m
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end
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puts begin_superblock(opts[:blocksize], nr_data_blocks)
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mappings.each do |b|
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if opts[:range]
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puts begin_device(dev_id, b), range_mapping(0, to, b), end_device
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else
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puts begin_device(dev_id, b)
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0.step(b - 1) { |from| puts single_mapping(from, to + from) }
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puts end_device
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end
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dev_id += 1
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to += b
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end
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puts end_superblock
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end
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#----------------------------------------------------------------
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# Main
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#
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xml_metadata(parse_command_line(ARGV))
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