thin-provisioning-tools/thin-provisioning/create_xml_data

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#!/usr/bin/env ruby
#
# Copyright (C) 2013 Red Hat, GmbH
#
# Simple XML metadata creation tool
#
require 'optparse'
require 'pathname'
#----------------------------------------------------------------
$prg = Pathname.new($0).basename
def init_units
units = {}
units[:bytes_per_sector] = 512
units[:chars] = "bsKkMmGgTtPpEeZzYy"
units[:strings] = [ 'bytes', 'sectors',
'kilobytes', 'kibibytes', 'megabytes', 'mebibytes',
'gigabytes', 'gibibytes', 'terabytes', 'tebibytes',
'petabytes', 'pebibytes', 'exabytes', 'ebibytes',
'zetabytes', 'zebibytes', 'yottabytes', 'yobibytes' ]
units[:factors] = [ 1, units[:bytes_per_sector] ]
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1.step(8) { |e| units[:factors] += [ 1000**e, 1024**e ] }
units
end
def get_index(unit_char, units)
unit_char ? units[:chars].index(unit_char) : 1
end
def to_sectors(size, units)
a = size.split(/[#{units[:chars]}]/)
s = size.to_i.to_s
abort "#{$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
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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"
end
def xml_metadata(opts, units)
blocks, to = opts[:thinsize] / opts[:blocksize], 0
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puts begin_superblock(opts[:blocksize], opts[:thins] * blocks)
0.step(opts[:thins] - 1) do |devid|
puts begin_device(devid, opts[:thinsize])
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if opts[:range]
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puts range_mapping(0, to, blocks)
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to += blocks
else
0.step(blocks - 1) do |from|
puts single_mapping(from, to)
to += 1
end
end
puts end_device
end
puts end_superblock
end
#----------------------------------------------------------------
# Main
#
xml_metadata(parse_command_line(ARGV, (units = init_units)), units)