144 lines
4.3 KiB
Ruby
Executable File
144 lines
4.3 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 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($0).basename
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def init_units
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units = {}
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units[:bytes_per_sector] = 512
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units[:chars] = "bskKmMgGtTpPeEzZyY"
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units[:strings] = [ 'bytes', 'sectors',
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'kilobytes', 'kibibytes', 'megabytes', 'mebibytes',
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'gigabytes', 'gibibytes', 'terabytes', 'tebibytes',
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'petabytes', 'pebibytes', 'exabytes', 'ebibytes',
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'zetabytes', 'zebibytes', 'yottabytes', 'yobibytes' ]
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units[:factors] = [ 1, units[:bytes_per_sector] ]
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1.step(8) { |e| units[:factors] += [ 1024**e, 1000**e ] }
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units
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end
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def get_index(unit_char, units)
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unit_char ? units[:chars].index(unit_char) : 1
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end
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def to_sectors(size, units)
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a = size.split(/[#{units[:chars]}]/)
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s = size.to_i.to_s
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abort "#{$prg} - only one unit character allowed!" if a.length > 1 || size.length - s.length > 1
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abort "#{$prg} - invalid unit specifier!" if s != a[0]
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size.to_i * units[:factors][get_index(size[a[0].length], units)] / units[:bytes_per_sector]
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end
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def check_opts(opts)
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abort "#{$prg} - 3 arguments required!" if opts.length < 3
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abort "#{$prg} - block size must be > 0" if opts[:blocksize] <= 0
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abort "#{$prg} - size must be much greater/equal blocksize" if opts[:thinsize] < opts[:blocksize]
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abort "#{$prg} - number of thin provisioned devices or snapshots must be > 0" if opts[:thins].nil? || opts[:thins] == 0
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abort "#{$prg} - size variation too large!" if !opts[:variation].nil? && (opts[:variation] > 2 * (opts[:thinsize] - opts[:blocksize]))
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end
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def parse_command_line(argv, units)
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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 BLOCKSIZE[#{units[:chars]}]", String,
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"Block size of thin provisioned devices.") do |bs|
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opts[:blocksize] = to_sectors(bs, units)
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end
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o.on("-s", "--thin-size SIZE[#{units[:chars]}]", String, "Average size of thin devices and snapshots.") do |sz|
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opts[:thinsize] = to_sectors(sz, units)
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end
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o.on("-r", "--range-mappings", "Create range mappings") do
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opts[:range] = true
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end
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o.on("-t", "--thins #THINS", Integer, "Sum of thin devices and snapshots.") do |mt|
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opts[:thins] = mt
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end
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o.on("-v", "--size-variation SIZE[#{units[:chars]}]", String, "Size variation of thin devices and snapshots.") do |sv|
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opts[:variation] = to_sectors(sv, units)
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end
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o.on("-h", "--help", "Output this help.") do
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puts o
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exit
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end
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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=\"0\" data_block_size=\"#{blocksize}\" nr_data_blocks=\"#{nr_data_blocks}\">\n"
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end
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def end_superblock
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"</superblock>\n"
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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\">\n"
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end
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def end_device
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" </device>\n"
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end
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def single_mapping(from, to)
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" <single_mapping time=\"0\" origin_block=\"#{from}\" data_block=\"#{to}\"/>\n"
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end
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def range_mapping(from, to, length)
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" <range_mapping time=\"0\" origin_begin=\"#{from}\" data_begin=\"#{to}\" length=\"#{length}\"/>\n"
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end
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def blocks(opts)
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opts[:thinsize] / opts[:blocksize]
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end
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def this_blocks(opts)
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opts[:variation].nil? ? blocks(opts) : (2 * opts[:thinsize] - rand(opts[:variation])) / 2 / opts[:blocksize]
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end
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def xml_metadata(opts, units)
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to = 0
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puts begin_superblock(opts[:blocksize], 2 * opts[:thins] * blocks(opts))
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0.step(opts[:thins] - 1) do |dev_id|
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b = this_blocks(opts)
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puts begin_device(dev_id, b)
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if opts[:range]
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puts range_mapping(0, to, b)
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to += b
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else
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0.step(b - 1) do |from|
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puts single_mapping(from, to)
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to += 1
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end
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end
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puts end_device
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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, (units = init_units)), units)
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