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#!/usr/bin/python

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# Copyright (C) 2006, 2007, 2010, 2012, 2013 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

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"""Script for unittesting the drbd module"""

import os

from ganeti import constants

from ganeti import errors

from ganeti.storage import drbd

from ganeti.storage import drbd_info

from ganeti.storage import drbd_cmdgen

import testutils

class TestDRBD8(testutils.GanetiTestCase):

  def testGetVersion(self):

    data = [

      "version: 8.0.0 (api:76/proto:80)",

      "version: 8.0.12 (api:76/proto:86-91)",

      "version: 8.2.7 (api:88/proto:0-100)",

      "version: 8.3.7.49 (api:188/proto:13-191)",

    ]

    result = [

      {

        "k_major": 8,

        "k_minor": 0,

        "k_point": 0,

        "api": 76,

        "proto": 80,

      },

      {

        "k_major": 8,

        "k_minor": 0,

        "k_point": 12,

        "api": 76,

        "proto": 86,

        "proto2": "91",

      },

      {

        "k_major": 8,

        "k_minor": 2,

        "k_point": 7,

        "api": 88,

        "proto": 0,

        "proto2": "100",

      },

      {

        "k_major": 8,

        "k_minor": 3,

        "k_point": 7,

        "k_fix": "49",

        "api": 188,

        "proto": 13,

        "proto2": "191",

      }

    ]

    for d, r in zip(data, result):

      info = drbd.DRBD8Info.CreateFromLines([d])

      self.assertEqual(info.GetVersion(), r)

      self.assertEqual(info.GetVersionString(), d.replace("version: ", ""))

class TestDRBD8Runner(testutils.GanetiTestCase):

  """Testing case for drbd.DRBD8Dev"""

  @staticmethod

  def _has_disk(data, dname, mname):

    """Check local disk corectness"""

    retval = (

      "local_dev" in data and

      data["local_dev"] == dname and

      "meta_dev" in data and

      data["meta_dev"] == mname and

      "meta_index" in data and

      data["meta_index"] == 0

      )

    return retval

  @staticmethod

  def _has_net(data, local, remote):

    """Check network connection parameters"""

    retval = (

      "local_addr" in data and

      data["local_addr"] == local and

      "remote_addr" in data and

      data["remote_addr"] == remote

      )

    return retval

  def testParser83Creation(self):

    """Test drbdsetup show parser creation"""

    drbd_info.DRBD83ShowInfo._GetShowParser()

  def testParser84Creation(self):

    """Test drbdsetup show parser creation"""

    drbd_info.DRBD84ShowInfo._GetShowParser()

  def testParser80(self):

    """Test drbdsetup show parser for disk and network version 8.0"""

    data = testutils.ReadTestData("bdev-drbd-8.0.txt")

    result = drbd_info.DRBD83ShowInfo.GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11000),

                                  ("192.0.2.2", 11000)),

                    "Wrong network info (8.0.x)")

  def testParser83(self):

    """Test drbdsetup show parser for disk and network version 8.3"""

    data = testutils.ReadTestData("bdev-drbd-8.3.txt")

    result = drbd_info.DRBD83ShowInfo.GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11000),

                                  ("192.0.2.2", 11000)),

                    "Wrong network info (8.3.x)")

  def testParser84(self):

    """Test drbdsetup show parser for disk and network version 8.4"""

    data = testutils.ReadTestData("bdev-drbd-8.4.txt")

    result = drbd_info.DRBD84ShowInfo.GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11000),

                                  ("192.0.2.2", 11000)),

                    "Wrong network info (8.4.x)")

  def testParserNetIP4(self):

    """Test drbdsetup show parser for IPv4 network"""

    data = testutils.ReadTestData("bdev-drbd-net-ip4.txt")

    result = drbd_info.DRBD83ShowInfo.GetDevInfo(data)

    self.failUnless(("local_dev" not in result and

                     "meta_dev" not in result and

                     "meta_index" not in result),

                    "Should not find local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11002),

                                  ("192.0.2.2", 11002)),

                    "Wrong network info (IPv4)")

  def testParserNetIP6(self):

    """Test drbdsetup show parser for IPv6 network"""

    data = testutils.ReadTestData("bdev-drbd-net-ip6.txt")

    result = drbd_info.DRBD83ShowInfo.GetDevInfo(data)

    self.failUnless(("local_dev" not in result and

                     "meta_dev" not in result and

                     "meta_index" not in result),

                    "Should not find local disk info")

    self.failUnless(self._has_net(result, ("2001:db8:65::1", 11048),

                                  ("2001:db8:66::1", 11048)),

                    "Wrong network info (IPv6)")

  def testParserDisk(self):

    """Test drbdsetup show parser for disk"""

    data = testutils.ReadTestData("bdev-drbd-disk.txt")

    result = drbd_info.DRBD83ShowInfo.GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(("local_addr" not in result and

                     "remote_addr" not in result),

                    "Should not find network info")

  def testBarriersOptions(self):

    """Test class method that generates drbdsetup options for disk barriers"""

    # Tests that should fail because of wrong version/options combinations

    should_fail = [

      (8, 0, 12, "bfd", True),

      (8, 0, 12, "fd", False),

      (8, 0, 12, "b", True),

      (8, 2, 7, "bfd", True),

      (8, 2, 7, "b", True)

    ]

    for vmaj, vmin, vrel, opts, meta in should_fail:

      self.assertRaises(errors.BlockDeviceError,

                        drbd_cmdgen.DRBD83CmdGenerator._ComputeDiskBarrierArgs,

                        vmaj, vmin, vrel, opts, meta)

    # get the valid options from the frozenset(frozenset()) in constants.

    valid_options = [list(x)[0] for x in constants.DRBD_VALID_BARRIER_OPT]

    # Versions that do not support anything

    for vmaj, vmin, vrel in ((8, 0, 0), (8, 0, 11), (8, 2, 6)):

      for opts in valid_options:

        self.assertRaises(

          errors.BlockDeviceError,

          drbd_cmdgen.DRBD83CmdGenerator._ComputeDiskBarrierArgs,

          vmaj, vmin, vrel, opts, True)

    # Versions with partial support (testing only options that are supported)

    tests = [

      (8, 0, 12, "n", False, []),

      (8, 0, 12, "n", True, ["--no-md-flushes"]),

      (8, 2, 7, "n", False, []),

      (8, 2, 7, "fd", False, ["--no-disk-flushes", "--no-disk-drain"]),

      (8, 0, 12, "n", True, ["--no-md-flushes"]),

      ]

    # Versions that support everything

    for vmaj, vmin, vrel in ((8, 3, 0), (8, 3, 12)):

      tests.append((vmaj, vmin, vrel, "bfd", True,

                    ["--no-disk-barrier", "--no-disk-drain",

                     "--no-disk-flushes", "--no-md-flushes"]))

      tests.append((vmaj, vmin, vrel, "n", False, []))

      tests.append((vmaj, vmin, vrel, "b", True,

                    ["--no-disk-barrier", "--no-md-flushes"]))

      tests.append((vmaj, vmin, vrel, "fd", False,

                    ["--no-disk-flushes", "--no-disk-drain"]))

      tests.append((vmaj, vmin, vrel, "n", True, ["--no-md-flushes"]))

    # Test execution

    for test in tests:

      vmaj, vmin, vrel, disabled_barriers, disable_meta_flush, expected = test

      args = \

        drbd_cmdgen.DRBD83CmdGenerator._ComputeDiskBarrierArgs(

          vmaj, vmin, vrel,

          disabled_barriers,

          disable_meta_flush)

      self.failUnless(set(args) == set(expected),

                      "For test %s, got wrong results %s" % (test, args))

    # Unsupported or invalid versions

    for vmaj, vmin, vrel in ((0, 7, 25), (9, 0, 0), (7, 0, 0), (8, 4, 0)):

      self.assertRaises(errors.BlockDeviceError,

                        drbd_cmdgen.DRBD83CmdGenerator._ComputeDiskBarrierArgs,

                        vmaj, vmin, vrel, "n", True)

    # Invalid options

    for option in ("", "c", "whatever", "nbdfc", "nf"):

      self.assertRaises(errors.BlockDeviceError,

                        drbd_cmdgen.DRBD83CmdGenerator._ComputeDiskBarrierArgs,

                        8, 3, 11, option, True)

class TestDRBD8Status(testutils.GanetiTestCase):

  """Testing case for DRBD8Dev /proc status"""

  def setUp(self):

    """Read in txt data"""

    testutils.GanetiTestCase.setUp(self)

    proc_data = testutils.TestDataFilename("proc_drbd8.txt")

    proc80e_data = testutils.TestDataFilename("proc_drbd80-emptyline.txt")

    proc83_data = testutils.TestDataFilename("proc_drbd83.txt")

    proc83_sync_data = testutils.TestDataFilename("proc_drbd83_sync.txt")

    proc83_sync_krnl_data = \

      testutils.TestDataFilename("proc_drbd83_sync_krnl2.6.39.txt")

    proc84_data = testutils.TestDataFilename("proc_drbd84.txt")

    proc84_sync_data = testutils.TestDataFilename("proc_drbd84_sync.txt")

    self.proc80ev_data = \

      testutils.TestDataFilename("proc_drbd80-emptyversion.txt")

    self.drbd_info = drbd.DRBD8Info.CreateFromFile(filename=proc_data)

    self.drbd_info80e = drbd.DRBD8Info.CreateFromFile(filename=proc80e_data)

    self.drbd_info83 = drbd.DRBD8Info.CreateFromFile(filename=proc83_data)

    self.drbd_info83_sync = \

      drbd.DRBD8Info.CreateFromFile(filename=proc83_sync_data)

    self.drbd_info83_sync_krnl = \

      drbd.DRBD8Info.CreateFromFile(filename=proc83_sync_krnl_data)

    self.drbd_info84 = drbd.DRBD8Info.CreateFromFile(filename=proc84_data)

    self.drbd_info84_sync = \

      drbd.DRBD8Info.CreateFromFile(filename=proc84_sync_data)

  def testIOErrors(self):

    """Test handling of errors while reading the proc file."""

    temp_file = self._CreateTempFile()

    os.unlink(temp_file)

    self.failUnlessRaises(errors.BlockDeviceError,

                          drbd.DRBD8Info.CreateFromFile, filename=temp_file)

  def testHelper(self):

    """Test reading usermode_helper in /sys."""

    sys_drbd_helper = testutils.TestDataFilename("sys_drbd_usermode_helper.txt")

    drbd_helper = drbd.DRBD8.GetUsermodeHelper(filename=sys_drbd_helper)

    self.failUnlessEqual(drbd_helper, "/bin/true")

  def testHelperIOErrors(self):

    """Test handling of errors while reading usermode_helper in /sys."""

    temp_file = self._CreateTempFile()

    os.unlink(temp_file)

    self.failUnlessRaises(errors.BlockDeviceError,

                          drbd.DRBD8.GetUsermodeHelper, filename=temp_file)

  def testMinorNotFound(self):

    """Test not-found-minor in /proc"""

    self.failUnless(not self.drbd_info.HasMinorStatus(9))

    self.failUnless(not self.drbd_info83.HasMinorStatus(9))

    self.failUnless(not self.drbd_info80e.HasMinorStatus(3))

  def testLineNotMatch(self):

    """Test wrong line passed to drbd_info.DRBD8Status"""

    self.assertRaises(errors.BlockDeviceError, drbd_info.DRBD8Status, "foo")

  def testMinor0(self):

    """Test connected, primary device"""

    for info in [self.drbd_info, self.drbd_info83, self.drbd_info84]:

      stats = info.GetMinorStatus(0)

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_primary and

                      stats.peer_secondary and stats.is_disk_uptodate)

  def testMinor1(self):

    """Test connected, secondary device"""

    for info in [self.drbd_info, self.drbd_info83, self.drbd_info84]:

      stats = info.GetMinorStatus(1)

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_secondary and

                      stats.peer_primary and stats.is_disk_uptodate)

  def testMinor2(self):

    """Test unconfigured device"""

    for info in [self.drbd_info, self.drbd_info83,

                 self.drbd_info80e, self.drbd_info84]:

      stats = info.GetMinorStatus(2)

      self.failIf(stats.is_in_use)

  def testMinor4(self):

    """Test WFconn device"""

    for info in [self.drbd_info, self.drbd_info83, self.drbd_info84]:

      stats = info.GetMinorStatus(4)

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_wfconn and stats.is_primary and

                      stats.rrole == "Unknown" and

                      stats.is_disk_uptodate)

  def testMinor6(self):

    """Test diskless device"""

    for info in [self.drbd_info, self.drbd_info83, self.drbd_info84]:

      stats = info.GetMinorStatus(6)

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_secondary and

                      stats.peer_primary and stats.is_diskless)

  def testMinor8(self):

    """Test standalone device"""

    for info in [self.drbd_info, self.drbd_info83, self.drbd_info84]:

      stats = info.GetMinorStatus(8)

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_standalone and

                      stats.rrole == "Unknown" and

                      stats.is_disk_uptodate)

  def testDRBD83SyncFine(self):

    stats = self.drbd_info83_sync.GetMinorStatus(3)

    self.failUnless(stats.is_in_resync)

    self.assertAlmostEqual(stats.sync_percent, 34.9)

  def testDRBD83SyncBroken(self):

    stats = self.drbd_info83_sync_krnl.GetMinorStatus(3)

    self.failUnless(stats.is_in_resync)

    self.assertAlmostEqual(stats.sync_percent, 2.4)

  def testDRBD84Sync(self):

    stats = self.drbd_info84_sync.GetMinorStatus(5)

    self.failUnless(stats.is_in_resync)

    self.assertAlmostEqual(stats.sync_percent, 68.5)

  def testDRBDEmptyVersion(self):

    self.assertRaises(errors.BlockDeviceError,

                      drbd.DRBD8Info.CreateFromFile,

                      filename=self.proc80ev_data)

class TestDRBD8Construction(testutils.GanetiTestCase):

  def setUp(self):

    """Read in txt data"""

    testutils.GanetiTestCase.setUp(self)

    self.proc80_info = \

      drbd_info.DRBD8Info.CreateFromFile(

        filename=testutils.TestDataFilename("proc_drbd8.txt"))

    self.proc83_info = \

      drbd_info.DRBD8Info.CreateFromFile(

        filename=testutils.TestDataFilename("proc_drbd83.txt"))

    self.proc84_info = \

      drbd_info.DRBD8Info.CreateFromFile(

        filename=testutils.TestDataFilename("proc_drbd84.txt"))

    self.test_unique_id = ("hosta.com", 123, "host2.com", 123, 0, "secret")

  @testutils.patch_object(drbd.DRBD8, "GetProcInfo")

  def testConstructionWith80Data(self, mock_create_from_file):

    mock_create_from_file.return_value = self.proc80_info

    inst = drbd.DRBD8Dev(self.test_unique_id, [], 123, {})

    self.assertEqual(inst._show_info_cls, drbd_info.DRBD83ShowInfo)

    self.assertTrue(isinstance(inst._cmd_gen, drbd_cmdgen.DRBD83CmdGenerator))

  @testutils.patch_object(drbd.DRBD8, "GetProcInfo")

  def testConstructionWith83Data(self, mock_create_from_file):

    mock_create_from_file.return_value = self.proc83_info

    inst = drbd.DRBD8Dev(self.test_unique_id, [], 123, {})

    self.assertEqual(inst._show_info_cls, drbd_info.DRBD83ShowInfo)

    self.assertTrue(isinstance(inst._cmd_gen, drbd_cmdgen.DRBD83CmdGenerator))

  @testutils.patch_object(drbd.DRBD8, "GetProcInfo")

  def testConstructionWith84Data(self, mock_create_from_file):

    mock_create_from_file.return_value = self.proc84_info

    inst = drbd.DRBD8Dev(self.test_unique_id, [], 123, {})

    self.assertEqual(inst._show_info_cls, drbd_info.DRBD84ShowInfo)

    self.assertTrue(isinstance(inst._cmd_gen, drbd_cmdgen.DRBD84CmdGenerator))

if __name__ == "__main__":

  testutils.GanetiTestProgram()