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#!/usr/bin/python # # Copyright (c) 2018 Red Hat, Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # """ vdoStats - Report statistics from an Albireo VDO. $Id: //eng/vdo-releases/magnesium/src/python/vdo/vdoStats#3 $ """ from __future__ import print_function import errno import gettext import locale import os import sys from optparse import OptionParser # Temporary patch to address layout changes for dir in sys.path: vdoDir = os.path.join(dir, 'vdo') if os.path.isdir(vdoDir): sys.path.append(vdoDir) break from statistics import * from utils import Command, CommandError, runCommand gettext.install('vdo') parser = OptionParser(usage="%prog [options] [device ...]"); parser.add_option("--all", action="store_true", dest="all", help=_("Equivalent to --verbose")) parser.add_option("--human-readable", action="store_true", dest="humanReadable", help=_("Display stats in human-readable form")) parser.add_option("--si", action="store_true", dest="si", help=_("Use SI units, implies --human-readable")) parser.add_option("--verbose", action="store_true", dest="verbose", help=_("Include verbose statistics")) parser.add_option("--version", action="store_true", dest="version", help=_("Print the vdostats version number and exit")) UNITS = [ 'B', 'K', 'M', 'G', 'T' ] ######################################################################## def makeDedupeFormatter(options): """ Make the formatter for dedupe stats if needed. :param options: The command line options :return: A formatter if needed or None """ if not options.verbose: return None return StatFormatter([{ 'namer' : '+' }, { 'indent': ' ', 'namer' : True }], hierarchical=False) ######################################################################## def enumerateDevices(): """ Enumerate the list of VDO devices on this host. :return: A list of VDO device names """ names = [] try: names = [name for name in runCommand(["vdo", "list"]).splitlines() if len(name) > 0] paths = [os.path.sep.join(["", "dev", "mapper", name]) for name in names] names = filter(os.path.exists, paths) except CommandError as e: print(_("Error enumerating VDO devices: {0}".format(e)), file = sys.stderr) return names ######################################################################## def transformDevices(devices): """ Iterates over the list of provided devices transforming any standalone device name or absolute path that represents a resolved vdo device to the name/path of the vdo device using the vdo name specified at its creation. Returns a list of sampling dictionaries. :param devices: A list of devices to sample. :return: The dictionary list of devices to sample. """ paths = enumerateDevices() names = [os.path.basename(x) for x in paths] resolvedPaths = [os.path.realpath(x) for x in paths] resolvedNames = [os.path.basename(x) for x in resolvedPaths] resolvedToVdoName = dict(zip(resolvedNames, names)) resolvedToVdoPath = dict(zip(resolvedPaths, paths)) transformedDevices = [] for (original, (head, tail)) in [(x, os.path.split(x)) for x in devices]: if tail in names: transformedDevices.append(Samples.samplingDevice(original, original)) continue if tail in resolvedNames: if head == '': transformedDevices.append( Samples.samplingDevice(original, resolvedToVdoName[tail])) continue if os.path.isabs(original) and (original in resolvedPaths): transformedDevices.append( Samples.samplingDevice(original, resolvedToVdoPath[original])) continue transformedDevices.append(Samples.samplingDevice(original, original)) return transformedDevices ######################################################################## def getDeviceStats(devices, assays): """ Get the statistics for a given device. :param devices: A list of devices to sample. If empty, all VDOs will be sampled. :param assays: The types of samples to take for each device :return: A tuple whose first entry is the Samples and whose second entry is the exit status to use if no subsequent error occurs. """ exitStatus = 0 if not devices: mustBeVDO = False devices = [Samples.samplingDevice(x, x) for x in enumerateDevices()] else: mustBeVDO = True # Get the device dictionary containing transformations of references to a # vdo device's resolved name/path to references to its symbolic name/path. devices = transformDevices(devices) # Filter out any specified devices that do not exist. # # Any specified device that passes os.path.exists is passed through. # If it fails os.path.exists and is not a full path it is checked # against being an entry in either /dev/mapper or /proc/vdo. # If either of those exists the original device is passed through # unchanged. existingDevices = [] for device in devices: user = device["user"] sample = device["sample"] if os.path.exists(sample): existingDevices.append(device) else: exists = False if (not os.path.isabs(sample)): exists = os.path.exists(os.path.sep.join(["", "dev", "mapper", sample])) if (not exists): sample = os.path.sep.join(["", "proc", "vdo", sample]) if ((not exists) and (not os.path.exists(sample))): print("'{0}': {1}".format(user, os.strerror(errno.ENOENT)), file = sys.stderr) exitStatus = 1 else: existingDevices.append(device) devices = existingDevices if len(devices) > 0: return (Samples.assayDevices(assays, devices, mustBeVDO), exitStatus) return (None, exitStatus) ######################################################################## def formatSize(size, options): """ Format a size (in KB) for printing. :param size: The size in bytes. :param options: The command line options :return: The size formatted for printing based on the options """ if isinstance(size, NotAvailable): return size if not options.humanReadable: return size size *= 1024 divisor = 1000.0 if options.si else 1024.0 unit = 0 while ((size >= divisor) and (unit < (len(UNITS) - 1))): size /= divisor unit += 1 return "{0:>.1f}{1}".format(size, UNITS[unit]) ######################################################################## def formatPercent(value): """ Format a percentage for printing. :param value: The value to format :return: The formatted value """ return value if isinstance(value, NotAvailable) else "{0}%".format(value) ######################################################################## def dfStats(sample, options): """ Extract the values needed for df-style output from a sample. :param sample: The sample from which to extract df values :param options: The command line options """ return ([formatSize(sample.getStat(statName), options) for statName in ["oneKBlocks", "oneKBlocksUsed", "oneKBlocksAvailable"]] + [formatPercent(sample.getStat(statName)) for statName in ["usedPercent", "savingPercent"]]) ######################################################################## def printDF(stats, options): """ Print stats in df-style. :param stats: A list of samples, one for each device sampled :param options: The command line options """ dfFormat = "{0:<20} {1:>9} {2:>9} {3:>9} {4:>4} {5:>13}" print(dfFormat.format("Device", "Size" if options.humanReadable else "1K-blocks", "Used", "Available", "Use%", "Space saving%")) for stat in stats: print(apply(dfFormat.format, [stat.getDevice()] + dfStats(stat.getSamples()[0], options))) ######################################################################## def printYAML(stats, dedupeFormatter): """ Print stats as (pseudo) YAML. :param stats: A list of Samples, one for each device sampled :param dedupeFormatter: The formatter for dedupe stats (may be None) """ for stat in stats: samples = stat.getSamples() if dedupeFormatter: dedupeFormatter.output(LabeledValue.make(stat.getDevice(), [s.labeled() for s in samples])) ######################################################################## def main(): try: locale.setlocale(locale.LC_ALL, '') except locale.Error: pass (options, devices) = parser.parse_args() if options.version: print("{0}.{1}".format(CURRENT_RELEASE_VERSION_NUMBER, VDOStatistics.statisticsVersion)) sys.exit(0) if options.all: options.verbose = True if options.si: options.humanReadable = True dedupeFormatter = makeDedupeFormatter(options) if options.verbose: statsTypes = [VDOStatistics(), KernelStatistics()] else: statsTypes = [VDOStatistics()] exitStatus = 0 try: (stats, exitStatus) = getDeviceStats(devices, statsTypes) if not stats: return exitStatus except Exception as e: print(e, file = sys.stderr) return 1 if options.verbose: printYAML(stats, dedupeFormatter) else: printDF(stats, options) return exitStatus ######################################################################## if __name__ == "__main__": sys.exit(main())

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