src/allmydata/test/test_dirnode.py

   1
   2 import time
   3 from twisted.trial import unittest
   4 from twisted.internet import defer
   5 from allmydata import uri, dirnode
   6 from allmydata.client import Client
   7 from allmydata.immutable import upload
   8 from allmydata.interfaces import IFileNode, \
   9      ExistingChildError, NoSuchChildError, \
  10      IDeepCheckResults, IDeepCheckAndRepairResults, CannotPackUnknownNodeError
  11 from allmydata.mutable.filenode import MutableFileNode
  12 from allmydata.mutable.common import UncoordinatedWriteError
  13 from allmydata.util import hashutil, base32
  14 from allmydata.monitor import Monitor
  15 from allmydata.test.common import make_chk_file_uri, make_mutable_file_uri, \
  16      ErrorMixin
  17 from allmydata.test.no_network import GridTestMixin
  18 from allmydata.unknown import UnknownNode
  19 from allmydata.nodemaker import NodeMaker
  20 from base64 import b32decode
  21 import common_util as testutil
  22
  23 class Dirnode(GridTestMixin, unittest.TestCase,
  24               testutil.ShouldFailMixin, testutil.StallMixin, ErrorMixin):
  25     timeout = 240 # It takes longer than 120 seconds on Francois's arm box.
  26
  27     def test_basic(self):
  28         self.basedir = "dirnode/Dirnode/test_basic"
  29         self.set_up_grid()
  30         c = self.g.clients[0]
  31         d = c.create_dirnode()
  32         def _done(res):
  33             self.failUnless(isinstance(res, dirnode.DirectoryNode))
  34             rep = str(res)
  35             self.failUnless("RW" in rep)
  36         d.addCallback(_done)
  37         return d
  38
  39     def test_check(self):
  40         self.basedir = "dirnode/Dirnode/test_check"
  41         self.set_up_grid()
  42         c = self.g.clients[0]
  43         d = c.create_dirnode()
  44         d.addCallback(lambda dn: dn.check(Monitor()))
  45         def _done(res):
  46             self.failUnless(res.is_healthy())
  47         d.addCallback(_done)
  48         return d
  49
  50     def _test_deepcheck_create(self):
  51         # create a small tree with a loop, and some non-directories
  52         #  root/
  53         #  root/subdir/
  54         #  root/subdir/file1
  55         #  root/subdir/link -> root
  56         #  root/rodir
  57         c = self.g.clients[0]
  58         d = c.create_dirnode()
  59         def _created_root(rootnode):
  60             self._rootnode = rootnode
  61             return rootnode.create_empty_directory(u"subdir")
  62         d.addCallback(_created_root)
  63         def _created_subdir(subdir):
  64             self._subdir = subdir
  65             d = subdir.add_file(u"file1", upload.Data("data"*100, None))
  66             d.addCallback(lambda res: subdir.set_node(u"link", self._rootnode))
  67             d.addCallback(lambda res: c.create_dirnode())
  68             d.addCallback(lambda dn:
  69                           self._rootnode.set_uri(u"rodir",
  70                                                  dn.get_uri(),
  71                                                  dn.get_readonly_uri()))
  72             return d
  73         d.addCallback(_created_subdir)
  74         def _done(res):
  75             return self._rootnode
  76         d.addCallback(_done)
  77         return d
  78
  79     def test_deepcheck(self):
  80         self.basedir = "dirnode/Dirnode/test_deepcheck"
  81         self.set_up_grid()
  82         d = self._test_deepcheck_create()
  83         d.addCallback(lambda rootnode: rootnode.start_deep_check().when_done())
  84         def _check_results(r):
  85             self.failUnless(IDeepCheckResults.providedBy(r))
  86             c = r.get_counters()
  87             self.failUnlessEqual(c,
  88                                  {"count-objects-checked": 4,
  89                                   "count-objects-healthy": 4,
  90                                   "count-objects-unhealthy": 0,
  91                                   "count-objects-unrecoverable": 0,
  92                                   "count-corrupt-shares": 0,
  93                                   })
  94             self.failIf(r.get_corrupt_shares())
  95             self.failUnlessEqual(len(r.get_all_results()), 4)
  96         d.addCallback(_check_results)
  97         return d
  98
  99     def test_deepcheck_and_repair(self):
 100         self.basedir = "dirnode/Dirnode/test_deepcheck_and_repair"
 101         self.set_up_grid()
 102         d = self._test_deepcheck_create()
 103         d.addCallback(lambda rootnode:
 104                       rootnode.start_deep_check_and_repair().when_done())
 105         def _check_results(r):
 106             self.failUnless(IDeepCheckAndRepairResults.providedBy(r))
 107             c = r.get_counters()
 108             self.failUnlessEqual(c,
 109                                  {"count-objects-checked": 4,
 110                                   "count-objects-healthy-pre-repair": 4,
 111                                   "count-objects-unhealthy-pre-repair": 0,
 112                                   "count-objects-unrecoverable-pre-repair": 0,
 113                                   "count-corrupt-shares-pre-repair": 0,
 114                                   "count-objects-healthy-post-repair": 4,
 115                                   "count-objects-unhealthy-post-repair": 0,
 116                                   "count-objects-unrecoverable-post-repair": 0,
 117                                   "count-corrupt-shares-post-repair": 0,
 118                                   "count-repairs-attempted": 0,
 119                                   "count-repairs-successful": 0,
 120                                   "count-repairs-unsuccessful": 0,
 121                                   })
 122             self.failIf(r.get_corrupt_shares())
 123             self.failIf(r.get_remaining_corrupt_shares())
 124             self.failUnlessEqual(len(r.get_all_results()), 4)
 125         d.addCallback(_check_results)
 126         return d
 127
 128     def _mark_file_bad(self, rootnode):
 129         si = rootnode.get_storage_index()
 130         self.delete_shares_numbered(rootnode.get_uri(), [0])
 131         return rootnode
 132
 133     def test_deepcheck_problems(self):
 134         self.basedir = "dirnode/Dirnode/test_deepcheck_problems"
 135         self.set_up_grid()
 136         d = self._test_deepcheck_create()
 137         d.addCallback(lambda rootnode: self._mark_file_bad(rootnode))
 138         d.addCallback(lambda rootnode: rootnode.start_deep_check().when_done())
 139         def _check_results(r):
 140             c = r.get_counters()
 141             self.failUnlessEqual(c,
 142                                  {"count-objects-checked": 4,
 143                                   "count-objects-healthy": 3,
 144                                   "count-objects-unhealthy": 1,
 145                                   "count-objects-unrecoverable": 0,
 146                                   "count-corrupt-shares": 0,
 147                                   })
 148             #self.failUnlessEqual(len(r.get_problems()), 1) # TODO
 149         d.addCallback(_check_results)
 150         return d
 151
 152     def test_readonly(self):
 153         self.basedir = "dirnode/Dirnode/test_readonly"
 154         self.set_up_grid()
 155         c = self.g.clients[0]
 156         nm = c.nodemaker
 157         filecap = make_chk_file_uri(1234)
 158         filenode = nm.create_from_cap(filecap)
 159         uploadable = upload.Data("some data", convergence="some convergence string")
 160
 161         d = c.create_dirnode()
 162         def _created(rw_dn):
 163             d2 = rw_dn.set_uri(u"child", filecap, filecap)
 164             d2.addCallback(lambda res: rw_dn)
 165             return d2
 166         d.addCallback(_created)
 167
 168         def _ready(rw_dn):
 169             ro_uri = rw_dn.get_readonly_uri()
 170             ro_dn = c.create_node_from_uri(ro_uri)
 171             self.failUnless(ro_dn.is_readonly())
 172             self.failUnless(ro_dn.is_mutable())
 173
 174             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 175                             ro_dn.set_uri, u"newchild", filecap, filecap)
 176             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 177                             ro_dn.set_node, u"newchild", filenode)
 178             self.shouldFail(dirnode.NotMutableError, "set_nodes ro", None,
 179                             ro_dn.set_nodes, [ (u"newchild", filenode) ])
 180             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 181                             ro_dn.add_file, u"newchild", uploadable)
 182             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 183                             ro_dn.delete, u"child")
 184             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 185                             ro_dn.create_empty_directory, u"newchild")
 186             self.shouldFail(dirnode.NotMutableError, "set_metadata_for ro", None,
 187                             ro_dn.set_metadata_for, u"child", {})
 188             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 189                             ro_dn.move_child_to, u"child", rw_dn)
 190             self.shouldFail(dirnode.NotMutableError, "set_uri ro", None,
 191                             rw_dn.move_child_to, u"child", ro_dn)
 192             return ro_dn.list()
 193         d.addCallback(_ready)
 194         def _listed(children):
 195             self.failUnless(u"child" in children)
 196         d.addCallback(_listed)
 197         return d
 198
 199     def failUnlessGreaterThan(self, a, b):
 200         self.failUnless(a > b, "%r should be > %r" % (a, b))
 201
 202     def failUnlessGreaterOrEqualThan(self, a, b):
 203         self.failUnless(a >= b, "%r should be >= %r" % (a, b))
 204
 205     def test_create(self):
 206         self.basedir = "dirnode/Dirnode/test_create"
 207         self.set_up_grid()
 208         c = self.g.clients[0]
 209
 210         self.expected_manifest = []
 211         self.expected_verifycaps = set()
 212         self.expected_storage_indexes = set()
 213
 214         d = c.create_dirnode()
 215         def _then(n):
 216             # /
 217             self.rootnode = n
 218             self.failUnless(n.is_mutable())
 219             u = n.get_uri()
 220             self.failUnless(u)
 221             self.failUnless(u.startswith("URI:DIR2:"), u)
 222             u_ro = n.get_readonly_uri()
 223             self.failUnless(u_ro.startswith("URI:DIR2-RO:"), u_ro)
 224             u_v = n.get_verify_cap().to_string()
 225             self.failUnless(u_v.startswith("URI:DIR2-Verifier:"), u_v)
 226             u_r = n.get_repair_cap().to_string()
 227             self.failUnlessEqual(u_r, u)
 228             self.expected_manifest.append( ((), u) )
 229             self.expected_verifycaps.add(u_v)
 230             si = n.get_storage_index()
 231             self.expected_storage_indexes.add(base32.b2a(si))
 232             expected_si = n._uri._filenode_uri.storage_index
 233             self.failUnlessEqual(si, expected_si)
 234
 235             d = n.list()
 236             d.addCallback(lambda res: self.failUnlessEqual(res, {}))
 237             d.addCallback(lambda res: n.has_child(u"missing"))
 238             d.addCallback(lambda res: self.failIf(res))
 239
 240             fake_file_uri = make_mutable_file_uri()
 241             other_file_uri = make_mutable_file_uri()
 242             m = c.nodemaker.create_from_cap(fake_file_uri)
 243             ffu_v = m.get_verify_cap().to_string()
 244             self.expected_manifest.append( ((u"child",) , m.get_uri()) )
 245             self.expected_verifycaps.add(ffu_v)
 246             self.expected_storage_indexes.add(base32.b2a(m.get_storage_index()))
 247             d.addCallback(lambda res: n.set_uri(u"child",
 248                                                 fake_file_uri, fake_file_uri))
 249             d.addCallback(lambda res:
 250                           self.shouldFail(ExistingChildError, "set_uri-no",
 251                                           "child 'child' already exists",
 252                                           n.set_uri, u"child",
 253                                           other_file_uri, other_file_uri,
 254                                           overwrite=False))
 255             # /
 256             # /child = mutable
 257
 258             d.addCallback(lambda res: n.create_empty_directory(u"subdir"))
 259
 260             # /
 261             # /child = mutable
 262             # /subdir = directory
 263             def _created(subdir):
 264                 self.failUnless(isinstance(subdir, dirnode.DirectoryNode))
 265                 self.subdir = subdir
 266                 new_v = subdir.get_verify_cap().to_string()
 267                 assert isinstance(new_v, str)
 268                 self.expected_manifest.append( ((u"subdir",), subdir.get_uri()) )
 269                 self.expected_verifycaps.add(new_v)
 270                 si = subdir.get_storage_index()
 271                 self.expected_storage_indexes.add(base32.b2a(si))
 272             d.addCallback(_created)
 273
 274             d.addCallback(lambda res:
 275                           self.shouldFail(ExistingChildError, "mkdir-no",
 276                                           "child 'subdir' already exists",
 277                                           n.create_empty_directory, u"subdir",
 278                                           overwrite=False))
 279
 280             d.addCallback(lambda res: n.list())
 281             d.addCallback(lambda children:
 282                           self.failUnlessEqual(sorted(children.keys()),
 283                                                sorted([u"child", u"subdir"])))
 284
 285             d.addCallback(lambda res: n.start_deep_stats().when_done())
 286             def _check_deepstats(stats):
 287                 self.failUnless(isinstance(stats, dict))
 288                 expected = {"count-immutable-files": 0,
 289                             "count-mutable-files": 1,
 290                             "count-literal-files": 0,
 291                             "count-files": 1,
 292                             "count-directories": 2,
 293                             "size-immutable-files": 0,
 294                             "size-literal-files": 0,
 295                             #"size-directories": 616, # varies
 296                             #"largest-directory": 616,
 297                             "largest-directory-children": 2,
 298                             "largest-immutable-file": 0,
 299                             }
 300                 for k,v in expected.iteritems():
 301                     self.failUnlessEqual(stats[k], v,
 302                                          "stats[%s] was %s, not %s" %
 303                                          (k, stats[k], v))
 304                 self.failUnless(stats["size-directories"] > 500,
 305                                 stats["size-directories"])
 306                 self.failUnless(stats["largest-directory"] > 500,
 307                                 stats["largest-directory"])
 308                 self.failUnlessEqual(stats["size-files-histogram"], [])
 309             d.addCallback(_check_deepstats)
 310
 311             d.addCallback(lambda res: n.build_manifest().when_done())
 312             def _check_manifest(res):
 313                 manifest = res["manifest"]
 314                 self.failUnlessEqual(sorted(manifest),
 315                                      sorted(self.expected_manifest))
 316                 stats = res["stats"]
 317                 _check_deepstats(stats)
 318                 self.failUnlessEqual(self.expected_verifycaps,
 319                                      res["verifycaps"])
 320                 self.failUnlessEqual(self.expected_storage_indexes,
 321                                      res["storage-index"])
 322             d.addCallback(_check_manifest)
 323
 324             def _add_subsubdir(res):
 325                 return self.subdir.create_empty_directory(u"subsubdir")
 326             d.addCallback(_add_subsubdir)
 327             # /
 328             # /child = mutable
 329             # /subdir = directory
 330             # /subdir/subsubdir = directory
 331             d.addCallback(lambda res: n.get_child_at_path(u"subdir/subsubdir"))
 332             d.addCallback(lambda subsubdir:
 333                           self.failUnless(isinstance(subsubdir,
 334                                                      dirnode.DirectoryNode)))
 335             d.addCallback(lambda res: n.get_child_at_path(u""))
 336             d.addCallback(lambda res: self.failUnlessEqual(res.get_uri(),
 337                                                            n.get_uri()))
 338
 339             d.addCallback(lambda res: n.get_metadata_for(u"child"))
 340             d.addCallback(lambda metadata:
 341                           self.failUnlessEqual(set(metadata.keys()),
 342                                                set(["tahoe", "ctime", "mtime"])))
 343
 344             d.addCallback(lambda res:
 345                           self.shouldFail(NoSuchChildError, "gcamap-no",
 346                                           "nope",
 347                                           n.get_child_and_metadata_at_path,
 348                                           u"subdir/nope"))
 349             d.addCallback(lambda res:
 350                           n.get_child_and_metadata_at_path(u""))
 351             def _check_child_and_metadata1(res):
 352                 child, metadata = res
 353                 self.failUnless(isinstance(child, dirnode.DirectoryNode))
 354                 # edge-metadata needs at least one path segment
 355                 self.failUnlessEqual(sorted(metadata.keys()), [])
 356             d.addCallback(_check_child_and_metadata1)
 357             d.addCallback(lambda res:
 358                           n.get_child_and_metadata_at_path(u"child"))
 359
 360             def _check_child_and_metadata2(res):
 361                 child, metadata = res
 362                 self.failUnlessEqual(child.get_uri(),
 363                                      fake_file_uri)
 364                 self.failUnlessEqual(set(metadata.keys()),
 365                                      set(["tahoe", "ctime", "mtime"]))
 366             d.addCallback(_check_child_and_metadata2)
 367
 368             d.addCallback(lambda res:
 369                           n.get_child_and_metadata_at_path(u"subdir/subsubdir"))
 370             def _check_child_and_metadata3(res):
 371                 child, metadata = res
 372                 self.failUnless(isinstance(child, dirnode.DirectoryNode))
 373                 self.failUnlessEqual(set(metadata.keys()),
 374                                      set(["tahoe", "ctime", "mtime"]))
 375             d.addCallback(_check_child_and_metadata3)
 376
 377             # set_uri + metadata
 378             # it should be possible to add a child without any metadata
 379             d.addCallback(lambda res: n.set_uri(u"c2",
 380                                                 fake_file_uri, fake_file_uri,
 381                                                 {}))
 382             d.addCallback(lambda res: n.get_metadata_for(u"c2"))
 383             d.addCallback(lambda metadata: self.failUnlessEqual(metadata.keys(), ['tahoe']))
 384
 385             # You can't override the link timestamps.
 386             d.addCallback(lambda res: n.set_uri(u"c2",
 387                                                 fake_file_uri, fake_file_uri,
 388                                                 { 'tahoe': {'linkcrtime': "bogus"}}))
 389             d.addCallback(lambda res: n.get_metadata_for(u"c2"))
 390             def _has_good_linkcrtime(metadata):
 391                 self.failUnless(metadata.has_key('tahoe'))
 392                 self.failUnless(metadata['tahoe'].has_key('linkcrtime'))
 393                 self.failIfEqual(metadata['tahoe']['linkcrtime'], 'bogus')
 394             d.addCallback(_has_good_linkcrtime)
 395
 396             # if we don't set any defaults, the child should get timestamps
 397             d.addCallback(lambda res: n.set_uri(u"c3",
 398                                                 fake_file_uri, fake_file_uri))
 399             d.addCallback(lambda res: n.get_metadata_for(u"c3"))
 400             d.addCallback(lambda metadata:
 401                           self.failUnlessEqual(set(metadata.keys()),
 402                                                set(["tahoe", "ctime", "mtime"])))
 403
 404             # or we can add specific metadata at set_uri() time, which
 405             # overrides the timestamps
 406             d.addCallback(lambda res: n.set_uri(u"c4",
 407                                                 fake_file_uri, fake_file_uri,
 408                                                 {"key": "value"}))
 409             d.addCallback(lambda res: n.get_metadata_for(u"c4"))
 410             d.addCallback(lambda metadata:
 411                               self.failUnless((set(metadata.keys()) == set(["key", "tahoe"])) and
 412                                               (metadata['key'] == "value"), metadata))
 413
 414             d.addCallback(lambda res: n.delete(u"c2"))
 415             d.addCallback(lambda res: n.delete(u"c3"))
 416             d.addCallback(lambda res: n.delete(u"c4"))
 417
 418             # set_node + metadata
 419             # it should be possible to add a child without any metadata
 420             d.addCallback(lambda res: n.set_node(u"d2", n, {}))
 421             d.addCallback(lambda res: c.create_dirnode())
 422             d.addCallback(lambda n2:
 423                           self.shouldFail(ExistingChildError, "set_node-no",
 424                                           "child 'd2' already exists",
 425                                           n.set_node, u"d2", n2,
 426                                           overwrite=False))
 427             d.addCallback(lambda res: n.get_metadata_for(u"d2"))
 428             d.addCallback(lambda metadata: self.failUnlessEqual(metadata.keys(), ['tahoe']))
 429
 430             # if we don't set any defaults, the child should get timestamps
 431             d.addCallback(lambda res: n.set_node(u"d3", n))
 432             d.addCallback(lambda res: n.get_metadata_for(u"d3"))
 433             d.addCallback(lambda metadata:
 434                           self.failUnlessEqual(set(metadata.keys()),
 435                                                set(["tahoe", "ctime", "mtime"])))
 436
 437             # or we can add specific metadata at set_node() time, which
 438             # overrides the timestamps
 439             d.addCallback(lambda res: n.set_node(u"d4", n,
 440                                                 {"key": "value"}))
 441             d.addCallback(lambda res: n.get_metadata_for(u"d4"))
 442             d.addCallback(lambda metadata:
 443                           self.failUnless((set(metadata.keys()) == set(["key", "tahoe"])) and
 444                                           (metadata['key'] == "value"), metadata))
 445
 446             d.addCallback(lambda res: n.delete(u"d2"))
 447             d.addCallback(lambda res: n.delete(u"d3"))
 448             d.addCallback(lambda res: n.delete(u"d4"))
 449
 450             # metadata through set_children()
 451             d.addCallback(lambda res:
 452                           n.set_children([
 453                               (u"e1", fake_file_uri, fake_file_uri),
 454                               (u"e2", fake_file_uri, fake_file_uri, {}),
 455                               (u"e3", fake_file_uri, fake_file_uri,
 456                                {"key": "value"}),
 457                               ]))
 458             d.addCallback(lambda res:
 459                           self.shouldFail(ExistingChildError, "set_children-no",
 460                                           "child 'e1' already exists",
 461                                           n.set_children,
 462                                           [ (u"e1", other_file_uri, other_file_uri),
 463                                             (u"new", other_file_uri, other_file_uri), ],
 464                                           overwrite=False))
 465             # and 'new' should not have been created
 466             d.addCallback(lambda res: n.list())
 467             d.addCallback(lambda children: self.failIf(u"new" in children))
 468             d.addCallback(lambda res: n.get_metadata_for(u"e1"))
 469             d.addCallback(lambda metadata:
 470                           self.failUnlessEqual(set(metadata.keys()),
 471                                                set(["tahoe", "ctime", "mtime"])))
 472             d.addCallback(lambda res: n.get_metadata_for(u"e2"))
 473             d.addCallback(lambda metadata:
 474                           self.failUnlessEqual(set(metadata.keys()), set(['tahoe'])))
 475             d.addCallback(lambda res: n.get_metadata_for(u"e3"))
 476             d.addCallback(lambda metadata:
 477                               self.failUnless((set(metadata.keys()) == set(["key", "tahoe"]))
 478                                               and (metadata['key'] == "value"), metadata))
 479
 480             d.addCallback(lambda res: n.delete(u"e1"))
 481             d.addCallback(lambda res: n.delete(u"e2"))
 482             d.addCallback(lambda res: n.delete(u"e3"))
 483
 484             # metadata through set_nodes()
 485             d.addCallback(lambda res: n.set_nodes([ (u"f1", n),
 486                                                     (u"f2", n, {}),
 487                                                     (u"f3", n,
 488                                                      {"key": "value"}),
 489                                                     ]))
 490             d.addCallback(lambda res:
 491                           self.shouldFail(ExistingChildError, "set_nodes-no",
 492                                           "child 'f1' already exists",
 493                                           n.set_nodes,
 494                                           [ (u"f1", n),
 495                                             (u"new", n), ],
 496                                           overwrite=False))
 497             # and 'new' should not have been created
 498             d.addCallback(lambda res: n.list())
 499             d.addCallback(lambda children: self.failIf(u"new" in children))
 500             d.addCallback(lambda res: n.get_metadata_for(u"f1"))
 501             d.addCallback(lambda metadata:
 502                           self.failUnlessEqual(set(metadata.keys()),
 503                                                set(["tahoe", "ctime", "mtime"])))
 504             d.addCallback(lambda res: n.get_metadata_for(u"f2"))
 505             d.addCallback(
 506                 lambda metadata: self.failUnlessEqual(set(metadata.keys()), set(['tahoe'])))
 507             d.addCallback(lambda res: n.get_metadata_for(u"f3"))
 508             d.addCallback(lambda metadata:
 509                               self.failUnless((set(metadata.keys()) == set(["key", "tahoe"])) and
 510                                               (metadata['key'] == "value"), metadata))
 511
 512             d.addCallback(lambda res: n.delete(u"f1"))
 513             d.addCallback(lambda res: n.delete(u"f2"))
 514             d.addCallback(lambda res: n.delete(u"f3"))
 515
 516
 517             d.addCallback(lambda res:
 518                           n.set_metadata_for(u"child",
 519                                              {"tags": ["web2.0-compatible"]}))
 520             d.addCallback(lambda n1: n1.get_metadata_for(u"child"))
 521             d.addCallback(lambda metadata:
 522                           self.failUnlessEqual(metadata,
 523                                                {"tags": ["web2.0-compatible"]}))
 524
 525             def _start(res):
 526                 self._start_timestamp = time.time()
 527             d.addCallback(_start)
 528             # simplejson-1.7.1 (as shipped on Ubuntu 'gutsy') rounds all
 529             # floats to hundredeths (it uses str(num) instead of repr(num)).
 530             # simplejson-1.7.3 does not have this bug. To prevent this bug
 531             # from causing the test to fail, stall for more than a few
 532             # hundrededths of a second.
 533             d.addCallback(self.stall, 0.1)
 534             d.addCallback(lambda res: n.add_file(u"timestamps",
 535                                                  upload.Data("stamp me", convergence="some convergence string")))
 536             d.addCallback(self.stall, 0.1)
 537             def _stop(res):
 538                 self._stop_timestamp = time.time()
 539             d.addCallback(_stop)
 540
 541             d.addCallback(lambda res: n.get_metadata_for(u"timestamps"))
 542             def _check_timestamp1(metadata):
 543                 self.failUnless("ctime" in metadata)
 544                 self.failUnless("mtime" in metadata)
 545                 self.failUnlessGreaterOrEqualThan(metadata["ctime"],
 546                                                   self._start_timestamp)
 547                 self.failUnlessGreaterOrEqualThan(self._stop_timestamp,
 548                                                   metadata["ctime"])
 549                 self.failUnlessGreaterOrEqualThan(metadata["mtime"],
 550                                                   self._start_timestamp)
 551                 self.failUnlessGreaterOrEqualThan(self._stop_timestamp,
 552                                                   metadata["mtime"])
 553                 # Our current timestamp rules say that replacing an existing
 554                 # child should preserve the 'ctime' but update the mtime
 555                 self._old_ctime = metadata["ctime"]
 556                 self._old_mtime = metadata["mtime"]
 557             d.addCallback(_check_timestamp1)
 558             d.addCallback(self.stall, 2.0) # accomodate low-res timestamps
 559             d.addCallback(lambda res: n.set_node(u"timestamps", n))
 560             d.addCallback(lambda res: n.get_metadata_for(u"timestamps"))
 561             def _check_timestamp2(metadata):
 562                 self.failUnlessEqual(metadata["ctime"], self._old_ctime,
 563                                      "%s != %s" % (metadata["ctime"],
 564                                                    self._old_ctime))
 565                 self.failUnlessGreaterThan(metadata["mtime"], self._old_mtime)
 566                 return n.delete(u"timestamps")
 567             d.addCallback(_check_timestamp2)
 568
 569             # also make sure we can add/update timestamps on a
 570             # previously-existing child that didn't have any, since there are
 571             # a lot of 0.7.0-generated edges around out there
 572             d.addCallback(lambda res: n.set_node(u"no_timestamps", n, {}))
 573             d.addCallback(lambda res: n.set_node(u"no_timestamps", n))
 574             d.addCallback(lambda res: n.get_metadata_for(u"no_timestamps"))
 575             d.addCallback(lambda metadata:
 576                           self.failUnlessEqual(set(metadata.keys()),
 577                                                set(["tahoe", "ctime", "mtime"])))
 578             d.addCallback(lambda res: n.delete(u"no_timestamps"))
 579
 580             d.addCallback(lambda res: n.delete(u"subdir"))
 581             d.addCallback(lambda old_child:
 582                           self.failUnlessEqual(old_child.get_uri(),
 583                                                self.subdir.get_uri()))
 584
 585             d.addCallback(lambda res: n.list())
 586             d.addCallback(lambda children:
 587                           self.failUnlessEqual(sorted(children.keys()),
 588                                                sorted([u"child"])))
 589
 590             uploadable1 = upload.Data("some data", convergence="converge")
 591             d.addCallback(lambda res: n.add_file(u"newfile", uploadable1))
 592             d.addCallback(lambda newnode:
 593                           self.failUnless(IFileNode.providedBy(newnode)))
 594             uploadable2 = upload.Data("some data", convergence="stuff")
 595             d.addCallback(lambda res:
 596                           self.shouldFail(ExistingChildError, "add_file-no",
 597                                           "child 'newfile' already exists",
 598                                           n.add_file, u"newfile",
 599                                           uploadable2,
 600                                           overwrite=False))
 601             d.addCallback(lambda res: n.list())
 602             d.addCallback(lambda children:
 603                           self.failUnlessEqual(sorted(children.keys()),
 604                                                sorted([u"child", u"newfile"])))
 605             d.addCallback(lambda res: n.get_metadata_for(u"newfile"))
 606             d.addCallback(lambda metadata:
 607                           self.failUnlessEqual(set(metadata.keys()),
 608                                                set(["tahoe", "ctime", "mtime"])))
 609
 610             uploadable3 = upload.Data("some data", convergence="converge")
 611             d.addCallback(lambda res: n.add_file(u"newfile-metadata",
 612                                                  uploadable3,
 613                                                  {"key": "value"}))
 614             d.addCallback(lambda newnode:
 615                           self.failUnless(IFileNode.providedBy(newnode)))
 616             d.addCallback(lambda res: n.get_metadata_for(u"newfile-metadata"))
 617             d.addCallback(lambda metadata:
 618                               self.failUnless((set(metadata.keys()) == set(["key", "tahoe"])) and
 619                                               (metadata['key'] == "value"), metadata))
 620             d.addCallback(lambda res: n.delete(u"newfile-metadata"))
 621
 622             d.addCallback(lambda res: n.create_empty_directory(u"subdir2"))
 623             def _created2(subdir2):
 624                 self.subdir2 = subdir2
 625                 # put something in the way, to make sure it gets overwritten
 626                 return subdir2.add_file(u"child", upload.Data("overwrite me",
 627                                                               "converge"))
 628             d.addCallback(_created2)
 629
 630             d.addCallback(lambda res:
 631                           n.move_child_to(u"child", self.subdir2))
 632             d.addCallback(lambda res: n.list())
 633             d.addCallback(lambda children:
 634                           self.failUnlessEqual(sorted(children.keys()),
 635                                                sorted([u"newfile", u"subdir2"])))
 636             d.addCallback(lambda res: self.subdir2.list())
 637             d.addCallback(lambda children:
 638                           self.failUnlessEqual(sorted(children.keys()),
 639                                                sorted([u"child"])))
 640             d.addCallback(lambda res: self.subdir2.get(u"child"))
 641             d.addCallback(lambda child:
 642                           self.failUnlessEqual(child.get_uri(),
 643                                                fake_file_uri))
 644
 645             # move it back, using new_child_name=
 646             d.addCallback(lambda res:
 647                           self.subdir2.move_child_to(u"child", n, u"newchild"))
 648             d.addCallback(lambda res: n.list())
 649             d.addCallback(lambda children:
 650                           self.failUnlessEqual(sorted(children.keys()),
 651                                                sorted([u"newchild", u"newfile",
 652                                                        u"subdir2"])))
 653             d.addCallback(lambda res: self.subdir2.list())
 654             d.addCallback(lambda children:
 655                           self.failUnlessEqual(sorted(children.keys()), []))
 656
 657             # now make sure that we honor overwrite=False
 658             d.addCallback(lambda res:
 659                           self.subdir2.set_uri(u"newchild",
 660                                                other_file_uri, other_file_uri))
 661
 662             d.addCallback(lambda res:
 663                           self.shouldFail(ExistingChildError, "move_child_to-no",
 664                                           "child 'newchild' already exists",
 665                                           n.move_child_to, u"newchild",
 666                                           self.subdir2,
 667                                           overwrite=False))
 668             d.addCallback(lambda res: self.subdir2.get(u"newchild"))
 669             d.addCallback(lambda child:
 670                           self.failUnlessEqual(child.get_uri(),
 671                                                other_file_uri))
 672
 673             return d
 674
 675         d.addCallback(_then)
 676
 677         d.addErrback(self.explain_error)
 678         return d
 679
 680 class Packing(unittest.TestCase):
 681     # This is a base32-encoded representation of the directory tree
 682     # root/file1
 683     # root/file2
 684     # root/file3
 685     # as represented after being fed to _pack_contents.
 686     # We have it here so we can decode it, feed it to
 687     # _unpack_contents, and verify that _unpack_contents
 688     # works correctly.
 689
 690     known_tree = 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
 691
 692     def test_unpack_and_pack_behavior(self):
 693         known_tree = b32decode(self.known_tree)
 694         nodemaker = NodeMaker(None, None, None,
 695                               None, None, None,
 696                               {"k": 3, "n": 10}, None)
 697         writecap = "URI:SSK-RO:e3mdrzfwhoq42hy5ubcz6rp3o4:ybyibhnp3vvwuq2vaw2ckjmesgkklfs6ghxleztqidihjyofgw7q"
 698         filenode = nodemaker.create_from_cap(writecap)
 699         node = dirnode.DirectoryNode(filenode, nodemaker, None)
 700         children = node._unpack_contents(known_tree)
 701         self._check_children(children)
 702
 703         packed_children = node._pack_contents(children)
 704         children = node._unpack_contents(packed_children)
 705         self._check_children(children)
 706
 707     def _check_children(self, children):
 708         # Are all the expected child nodes there?
 709         self.failUnless(children.has_key(u'file1'))
 710         self.failUnless(children.has_key(u'file2'))
 711         self.failUnless(children.has_key(u'file3'))
 712
 713         # Are the metadata for child 3 right?
 714         file3_rocap = "URI:CHK:cmtcxq7hwxvfxan34yiev6ivhy:qvcekmjtoetdcw4kmi7b3rtblvgx7544crnwaqtiewemdliqsokq:3:10:5"
 715         file3_rwcap = "URI:CHK:cmtcxq7hwxvfxan34yiev6ivhy:qvcekmjtoetdcw4kmi7b3rtblvgx7544crnwaqtiewemdliqsokq:3:10:5"
 716         file3_metadata = {'ctime': 1246663897.4336269, 'tahoe': {'linkmotime': 1246663897.4336269, 'linkcrtime': 1246663897.4336269}, 'mtime': 1246663897.4336269}
 717         self.failUnlessEqual(file3_metadata, children[u'file3'][1])
 718         self.failUnlessEqual(file3_rocap,
 719                              children[u'file3'][0].get_readonly_uri())
 720         self.failUnlessEqual(file3_rwcap,
 721                              children[u'file3'][0].get_uri())
 722
 723         # Are the metadata for child 2 right?
 724         file2_rocap = "URI:CHK:apegrpehshwugkbh3jlt5ei6hq:5oougnemcl5xgx4ijgiumtdojlipibctjkbwvyygdymdphib2fvq:3:10:4"
 725         file2_rwcap = "URI:CHK:apegrpehshwugkbh3jlt5ei6hq:5oougnemcl5xgx4ijgiumtdojlipibctjkbwvyygdymdphib2fvq:3:10:4"
 726         file2_metadata = {'ctime': 1246663897.430218, 'tahoe': {'linkmotime': 1246663897.430218, 'linkcrtime': 1246663897.430218}, 'mtime': 1246663897.430218}
 727         self.failUnlessEqual(file2_metadata, children[u'file2'][1])
 728         self.failUnlessEqual(file2_rocap,
 729                              children[u'file2'][0].get_readonly_uri())
 730         self.failUnlessEqual(file2_rwcap,
 731                              children[u'file2'][0].get_uri())
 732
 733         # Are the metadata for child 1 right?
 734         file1_rocap = "URI:CHK:olxtimympo7f27jvhtgqlnbtn4:emzdnhk2um4seixozlkw3qx2nfijvdkx3ky7i7izl47yedl6e64a:3:10:10"
 735         file1_rwcap = "URI:CHK:olxtimympo7f27jvhtgqlnbtn4:emzdnhk2um4seixozlkw3qx2nfijvdkx3ky7i7izl47yedl6e64a:3:10:10"
 736         file1_metadata = {'ctime': 1246663897.4275661, 'tahoe': {'linkmotime': 1246663897.4275661, 'linkcrtime': 1246663897.4275661}, 'mtime': 1246663897.4275661}
 737         self.failUnlessEqual(file1_metadata, children[u'file1'][1])
 738         self.failUnlessEqual(file1_rocap,
 739                              children[u'file1'][0].get_readonly_uri())
 740         self.failUnlessEqual(file1_rwcap,
 741                              children[u'file1'][0].get_uri())
 742
 743     def test_caching_dict(self):
 744         d = dirnode.CachingDict()
 745         d.set_both_items("test", "test2", ("test3", "test4"))
 746         cached, value = d.get_both_items("test")
 747
 748         self.failUnlessEqual(cached, "test2")
 749         self.failUnlessEqual(value, ("test3", "test4"))
 750
 751         d['test'] = ("test3", "test2")
 752
 753         cached, value = d.get_both_items("test")
 754
 755         self.failUnlessEqual(cached, None)
 756         self.failUnlessEqual(value, ("test3", "test2"))
 757
 758 class FakeMutableFile:
 759     counter = 0
 760     def __init__(self, initial_contents=""):
 761         self.data = initial_contents
 762         counter = FakeMutableFile.counter
 763         FakeMutableFile.counter += 1
 764         writekey = hashutil.ssk_writekey_hash(str(counter))
 765         fingerprint = hashutil.ssk_pubkey_fingerprint_hash(str(counter))
 766         self.uri = uri.WriteableSSKFileURI(writekey, fingerprint)
 767     def get_uri(self):
 768         return self.uri.to_string()
 769     def download_best_version(self):
 770         return defer.succeed(self.data)
 771     def get_writekey(self):
 772         return "writekey"
 773     def is_readonly(self):
 774         return False
 775     def is_mutable(self):
 776         return True
 777     def modify(self, modifier):
 778         self.data = modifier(self.data, None, True)
 779         return defer.succeed(None)
 780
 781 class FakeNodeMaker(NodeMaker):
 782     def create_mutable_file(self, contents="", keysize=None):
 783         return defer.succeed(FakeMutableFile(contents))
 784
 785 class FakeClient2(Client):
 786     def __init__(self):
 787         self.nodemaker = FakeNodeMaker(None, None, None,
 788                                        None, None, None,
 789                                        {"k":3,"n":10}, None)
 790     def create_node_from_uri(self, rwcap, rocap):
 791         return self.nodemaker.create_from_cap(rwcap, rocap)
 792
 793 class Dirnode2(unittest.TestCase, testutil.ShouldFailMixin):
 794     def setUp(self):
 795         self.client = FakeClient2()
 796         self.nodemaker = self.client.nodemaker
 797
 798     def test_from_future(self):
 799         # create a dirnode that contains unknown URI types, and make sure we
 800         # tolerate them properly. Since dirnodes aren't allowed to add
 801         # unknown node types, we have to be tricky.
 802         d = self.nodemaker.create_new_mutable_directory()
 803         future_writecap = "x-tahoe-crazy://I_am_from_the_future."
 804         future_readcap = "x-tahoe-crazy-readonly://I_am_from_the_future."
 805         future_node = UnknownNode(future_writecap, future_readcap)
 806         def _then(n):
 807             self._node = n
 808             return n.set_node(u"future", future_node)
 809         d.addCallback(_then)
 810
 811         # we should be prohibited from adding an unknown URI to a directory,
 812         # since we don't know how to diminish the cap to a readcap (for the
 813         # dirnode's rocap slot), and we don't want to accidentally grant
 814         # write access to a holder of the dirnode's readcap.
 815         d.addCallback(lambda ign:
 816              self.shouldFail(CannotPackUnknownNodeError,
 817                              "copy unknown",
 818                              "cannot pack unknown node as child add",
 819                              self._node.set_uri, u"add",
 820                              future_writecap, future_readcap))
 821         d.addCallback(lambda ign: self._node.list())
 822         def _check(children):
 823             self.failUnlessEqual(len(children), 1)
 824             (fn, metadata) = children[u"future"]
 825             self.failUnless(isinstance(fn, UnknownNode), fn)
 826             self.failUnlessEqual(fn.get_uri(), future_writecap)
 827             self.failUnlessEqual(fn.get_readonly_uri(), future_readcap)
 828             # but we *should* be allowed to copy this node, because the
 829             # UnknownNode contains all the information that was in the
 830             # original directory (readcap and writecap), so we're preserving
 831             # everything.
 832             return self._node.set_node(u"copy", fn)
 833         d.addCallback(_check)
 834         d.addCallback(lambda ign: self._node.list())
 835         def _check2(children):
 836             self.failUnlessEqual(len(children), 2)
 837             (fn, metadata) = children[u"copy"]
 838             self.failUnless(isinstance(fn, UnknownNode), fn)
 839             self.failUnlessEqual(fn.get_uri(), future_writecap)
 840             self.failUnlessEqual(fn.get_readonly_uri(), future_readcap)
 841         return d
 842
 843 class DeepStats(unittest.TestCase):
 844     timeout = 240 # It takes longer than 120 seconds on Francois's arm box.
 845     def test_stats(self):
 846         ds = dirnode.DeepStats(None)
 847         ds.add("count-files")
 848         ds.add("size-immutable-files", 123)
 849         ds.histogram("size-files-histogram", 123)
 850         ds.max("largest-directory", 444)
 851
 852         s = ds.get_results()
 853         self.failUnlessEqual(s["count-files"], 1)
 854         self.failUnlessEqual(s["size-immutable-files"], 123)
 855         self.failUnlessEqual(s["largest-directory"], 444)
 856         self.failUnlessEqual(s["count-literal-files"], 0)
 857
 858         ds.add("count-files")
 859         ds.add("size-immutable-files", 321)
 860         ds.histogram("size-files-histogram", 321)
 861         ds.max("largest-directory", 2)
 862
 863         s = ds.get_results()
 864         self.failUnlessEqual(s["count-files"], 2)
 865         self.failUnlessEqual(s["size-immutable-files"], 444)
 866         self.failUnlessEqual(s["largest-directory"], 444)
 867         self.failUnlessEqual(s["count-literal-files"], 0)
 868         self.failUnlessEqual(s["size-files-histogram"],
 869                              [ (101, 316, 1), (317, 1000, 1) ])
 870
 871         ds = dirnode.DeepStats(None)
 872         for i in range(1, 1100):
 873             ds.histogram("size-files-histogram", i)
 874         ds.histogram("size-files-histogram", 4*1000*1000*1000*1000) # 4TB
 875         s = ds.get_results()
 876         self.failUnlessEqual(s["size-files-histogram"],
 877                              [ (1, 3, 3),
 878                                (4, 10, 7),
 879                                (11, 31, 21),
 880                                (32, 100, 69),
 881                                (101, 316, 216),
 882                                (317, 1000, 684),
 883                                (1001, 3162, 99),
 884                                (3162277660169L, 10000000000000L, 1),
 885                                ])
 886
 887 class UCWEingMutableFileNode(MutableFileNode):
 888     please_ucwe_after_next_upload = False
 889
 890     def _upload(self, new_contents, servermap):
 891         d = MutableFileNode._upload(self, new_contents, servermap)
 892         def _ucwe(res):
 893             if self.please_ucwe_after_next_upload:
 894                 self.please_ucwe_after_next_upload = False
 895                 raise UncoordinatedWriteError()
 896             return res
 897         d.addCallback(_ucwe)
 898         return d
 899
 900 class UCWEingNodeMaker(NodeMaker):
 901     def _create_mutable(self, cap):
 902         n = UCWEingMutableFileNode(self.storage_broker, self.secret_holder,
 903                                    self.default_encoding_parameters,
 904                                    self.history)
 905         return n.init_from_uri(cap)
 906
 907
 908 class Deleter(GridTestMixin, unittest.TestCase):
 909     timeout = 3600 # It takes longer than 433 seconds on Zandr's ARM box.
 910     def test_retry(self):
 911         # ticket #550, a dirnode.delete which experiences an
 912         # UncoordinatedWriteError will fail with an incorrect "you're
 913         # deleting something which isn't there" NoSuchChildError exception.
 914
 915         # to trigger this, we start by creating a directory with a single
 916         # file in it. Then we create a special dirnode that uses a modified
 917         # MutableFileNode which will raise UncoordinatedWriteError once on
 918         # demand. We then call dirnode.delete, which ought to retry and
 919         # succeed.
 920
 921         self.basedir = self.mktemp()
 922         self.set_up_grid()
 923         c0 = self.g.clients[0]
 924         d = c0.create_dirnode()
 925         small = upload.Data("Small enough for a LIT", None)
 926         def _created_dir(dn):
 927             self.root = dn
 928             self.root_uri = dn.get_uri()
 929             return dn.add_file(u"file", small)
 930         d.addCallback(_created_dir)
 931         def _do_delete(ignored):
 932             nm = UCWEingNodeMaker(c0.storage_broker, c0._secret_holder,
 933                                   c0.get_history(), c0.getServiceNamed("uploader"),
 934                                   c0.downloader,
 935                                   c0.download_cache_dirman,
 936                                   c0.get_encoding_parameters(),
 937                                   c0._key_generator)
 938             n = nm.create_from_cap(self.root_uri)
 939             assert n._node.please_ucwe_after_next_upload == False
 940             n._node.please_ucwe_after_next_upload = True
 941             # This should succeed, not raise an exception
 942             return n.delete(u"file")
 943         d.addCallback(_do_delete)
 944
 945         return d
 946
 947 class Adder(GridTestMixin, unittest.TestCase, testutil.ShouldFailMixin):
 948
 949     def test_overwrite(self):
 950         # note: This functionality could be tested without actually creating
 951         # several RSA keys. It would be faster without the GridTestMixin: use
 952         # dn.set_node(nodemaker.create_from_cap(make_chk_file_uri())) instead
 953         # of dn.add_file, and use a special NodeMaker that creates fake
 954         # mutable files.
 955         self.basedir = "dirnode/Adder/test_overwrite"
 956         self.set_up_grid()
 957         c = self.g.clients[0]
 958         fileuri = make_chk_file_uri(1234)
 959         filenode = c.nodemaker.create_from_cap(fileuri)
 960         d = c.create_dirnode()
 961
 962         def _create_directory_tree(root_node):
 963             # Build
 964             # root/file1
 965             # root/file2
 966             # root/dir1
 967             d = root_node.add_file(u'file1', upload.Data("Important Things",
 968                 None))
 969             d.addCallback(lambda res:
 970                 root_node.add_file(u'file2', upload.Data("Sekrit Codes", None)))
 971             d.addCallback(lambda res:
 972                 root_node.create_empty_directory(u"dir1"))
 973             d.addCallback(lambda res: root_node)
 974             return d
 975
 976         d.addCallback(_create_directory_tree)
 977
 978         def _test_adder(root_node):
 979             d = root_node.set_node(u'file1', filenode)
 980             # We've overwritten file1. Let's try it with a directory
 981             d.addCallback(lambda res:
 982                 root_node.create_empty_directory(u'dir2'))
 983             d.addCallback(lambda res:
 984                 root_node.set_node(u'dir2', filenode))
 985             # We try overwriting a file with a child while also specifying
 986             # overwrite=False. We should receive an ExistingChildError
 987             # when we do this.
 988             d.addCallback(lambda res:
 989                 self.shouldFail(ExistingChildError, "set_node",
 990                                 "child 'file1' already exists",
 991                                root_node.set_node, u"file1",
 992                                filenode, overwrite=False))
 993             # If we try with a directory, we should see the same thing
 994             d.addCallback(lambda res:
 995                 self.shouldFail(ExistingChildError, "set_node",
 996                                 "child 'dir1' already exists",
 997                                 root_node.set_node, u'dir1', filenode,
 998                                 overwrite=False))
 999             d.addCallback(lambda res:
1000                  root_node.set_node(u'file1', filenode,
1001                                     overwrite="only-files"))
1002             d.addCallback(lambda res:
1003                  self.shouldFail(ExistingChildError, "set_node",
1004                                 "child 'dir1' already exists",
1005                                 root_node.set_node, u'dir1', filenode,
1006                                 overwrite="only-files"))
1007             return d
1008
1009         d.addCallback(_test_adder)
1010         return d