source4/scripting/python/samba/dbchecker.py

   1 #!/usr/bin/env python
   2 #
   3 # Samba4 AD database checker
   4 #
   5 # Copyright (C) Andrew Tridgell 2011
   6 # Copyright (C) Matthieu Patou <mat@matws.net> 2011
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 import ldb
  23 from samba import dsdb
  24 from samba import common
  25 from samba.dcerpc import misc
  26 from samba.ndr import ndr_unpack
  27 from samba.dcerpc import drsblobs
  28 from samba.common import dsdb_Dn
  29
  30 class dbcheck(object):
  31     """check a SAM database for errors"""
  32
  33     def __init__(self, samdb, samdb_schema=None, verbose=False, fix=False, yes=False, quiet=False):
  34         self.samdb = samdb
  35         self.dict_oid_name = None
  36         self.samdb_schema = (samdb_schema or samdb)
  37         self.verbose = verbose
  38         self.fix = fix
  39         self.yes = yes
  40         self.quiet = quiet
  41         self.remove_all_unknown_attributes = False
  42         self.remove_all_empty_attributes = False
  43         self.fix_all_normalisation = False
  44         self.fix_all_DN_GUIDs = False
  45         self.remove_all_deleted_DN_links = False
  46         self.fix_all_target_mismatch = False
  47         self.fix_all_metadata = False
  48         self.fix_time_metadata = False
  49         self.fix_all_missing_backlinks = False
  50         self.fix_all_orphaned_backlinks = False
  51
  52     def check_database(self, DN=None, scope=ldb.SCOPE_SUBTREE, controls=[], attrs=['*']):
  53         '''perform a database check, returning the number of errors found'''
  54
  55         res = self.samdb.search(base=DN, scope=scope, attrs=['dn'], controls=controls)
  56         self.report('Checking %u objects' % len(res))
  57         error_count = 0
  58
  59         for object in res:
  60             error_count += self.check_object(object.dn, attrs=attrs)
  61
  62         if DN is None:
  63             error_count += self.check_rootdse()
  64
  65         if error_count != 0 and not self.fix:
  66             self.report("Please use --fix to fix these errors")
  67
  68
  69         self.report('Checked %u objects (%u errors)' % (len(res), error_count))
  70
  71         return error_count
  72
  73
  74     def report(self, msg):
  75         '''print a message unless quiet is set'''
  76         if not self.quiet:
  77             print(msg)
  78
  79
  80     ################################################################
  81     # a local confirm function that obeys the --fix and --yes options
  82     def confirm(self, msg, allow_all=False, forced=False):
  83         '''confirm a change'''
  84         if not self.fix:
  85             return False
  86         if self.quiet:
  87             return self.yes
  88         if self.yes:
  89             forced = True
  90         return common.confirm(msg, forced=forced, allow_all=allow_all)
  91
  92     ################################################################
  93     # a local confirm function with support for 'all'
  94     def confirm_all(self, msg, all_attr):
  95         '''confirm a change with support for "all" '''
  96         if not self.fix:
  97             return False
  98         if self.quiet:
  99             return self.yes
 100         if getattr(self, all_attr) == 'NONE':
 101             return False
 102         if getattr(self, all_attr) == 'ALL':
 103             forced = True
 104         else:
 105             forced = self.yes
 106         c = common.confirm(msg, forced=forced, allow_all=True)
 107         if c == 'ALL':
 108             setattr(self, all_attr, 'ALL')
 109             return True
 110         if c == 'NONE':
 111             setattr(self, all_attr, 'NONE')
 112             return True
 113         return c
 114
 115
 116     def do_modify(self, m, controls, msg, validate=True):
 117         '''perform a modify with optional verbose output'''
 118         if self.verbose:
 119             self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
 120         try:
 121             self.samdb.modify(m, controls=controls, validate=validate)
 122         except Exception, err:
 123             self.report("%s : %s" % (msg, err))
 124             return False
 125         return True
 126
 127
 128     ################################################################
 129     # handle empty attributes
 130     def err_empty_attribute(self, dn, attrname):
 131         '''fix empty attributes'''
 132         self.report("ERROR: Empty attribute %s in %s" % (attrname, dn))
 133         if not self.confirm_all('Remove empty attribute %s from %s?' % (attrname, dn), 'remove_all_empty_attributes'):
 134             self.report("Not fixing empty attribute %s" % attrname)
 135             return
 136
 137         m = ldb.Message()
 138         m.dn = dn
 139         m[attrname] = ldb.MessageElement('', ldb.FLAG_MOD_DELETE, attrname)
 140         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 141                           "Failed to remove empty attribute %s" % attrname, validate=False):
 142             self.report("Removed empty attribute %s" % attrname)
 143
 144
 145     ################################################################
 146     # handle normalisation mismatches
 147     def err_normalise_mismatch(self, dn, attrname, values):
 148         '''fix attribute normalisation errors'''
 149         self.report("ERROR: Normalisation error for attribute %s in %s" % (attrname, dn))
 150         mod_list = []
 151         for val in values:
 152             normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
 153             if len(normalised) != 1:
 154                 self.report("Unable to normalise value '%s'" % val)
 155                 mod_list.append((val, ''))
 156             elif (normalised[0] != val):
 157                 self.report("value '%s' should be '%s'" % (val, normalised[0]))
 158                 mod_list.append((val, normalised[0]))
 159         if not self.confirm_all('Fix normalisation for %s from %s?' % (attrname, dn), 'fix_all_normalisation'):
 160             self.report("Not fixing attribute %s" % attrname)
 161             return
 162
 163         m = ldb.Message()
 164         m.dn = dn
 165         for i in range(0, len(mod_list)):
 166             (val, nval) = mod_list[i]
 167             m['value_%u' % i] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 168             if nval != '':
 169                 m['normv_%u' % i] = ldb.MessageElement(nval, ldb.FLAG_MOD_ADD, attrname)
 170
 171         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 172                           "Failed to normalise attribute %s" % attrname,
 173                           validate=False):
 174             self.report("Normalised attribute %s" % attrname)
 175
 176     def is_deleted_objects_dn(self, dsdb_dn):
 177         '''see if a dsdb_Dn is the special Deleted Objects DN'''
 178         return dsdb_dn.prefix == "B:32:18E2EA80684F11D2B9AA00C04F79F805:"
 179
 180
 181     ################################################################
 182     # handle a DN pointing to a deleted object
 183     def err_deleted_dn(self, dn, attrname, val, dsdb_dn, correct_dn):
 184         self.report("ERROR: target DN is deleted for %s in object %s - %s" % (attrname, dn, val))
 185         self.report("Target GUID points at deleted DN %s" % correct_dn)
 186         if not self.confirm_all('Remove DN link?', 'remove_all_deleted_DN_links'):
 187             self.report("Not removing")
 188             return
 189         m = ldb.Message()
 190         m.dn = dn
 191         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 192         if self.do_modify(m, ["show_recycled:1", "local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK],
 193                           "Failed to remove deleted DN attribute %s" % attrname):
 194             self.report("Removed deleted DN on attribute %s" % attrname)
 195
 196     ################################################################
 197     # handle a missing target DN (both GUID and DN string form are missing)
 198     def err_missing_dn_GUID(self, dn, attrname, val, dsdb_dn):
 199         # check if its a backlink
 200         linkID = self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)
 201         if (linkID & 1 == 0) and str(dsdb_dn).find('DEL\\0A') == -1:
 202             self.report("Not removing dangling forward link")
 203             return
 204         self.err_deleted_dn(dn, attrname, val, dsdb_dn, dsdb_dn)
 205
 206
 207     ################################################################
 208     # handle a missing GUID extended DN component
 209     def err_incorrect_dn_GUID(self, dn, attrname, val, dsdb_dn, errstr):
 210         self.report("ERROR: %s component for %s in object %s - %s" % (errstr, attrname, dn, val))
 211         controls=["extended_dn:1:1", "show_recycled:1"]
 212         try:
 213             res = self.samdb.search(base=str(dsdb_dn.dn), scope=ldb.SCOPE_BASE,
 214                                     attrs=[], controls=controls)
 215         except ldb.LdbError, (enum, estr):
 216             self.report("unable to find object for DN %s - (%s)" % (dsdb_dn.dn, estr))
 217             self.err_missing_dn_GUID(dn, attrname, val, dsdb_dn)
 218             return
 219         if len(res) == 0:
 220             self.report("unable to find object for DN %s" % dsdb_dn.dn)
 221             self.err_missing_dn_GUID(dn, attrname, val, dsdb_dn)
 222             return
 223         dsdb_dn.dn = res[0].dn
 224
 225         if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_DN_GUIDs'):
 226             self.report("Not fixing %s" % errstr)
 227             return
 228         m = ldb.Message()
 229         m.dn = dn
 230         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 231         m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
 232
 233         if self.do_modify(m, ["show_recycled:1"],
 234                           "Failed to fix %s on attribute %s" % (errstr, attrname)):
 235             self.report("Fixed %s on attribute %s" % (errstr, attrname))
 236
 237
 238     ################################################################
 239     # handle a DN string being incorrect
 240     def err_dn_target_mismatch(self, dn, attrname, val, dsdb_dn, correct_dn, errstr):
 241         self.report("ERROR: incorrect DN string component for %s in object %s - %s" % (attrname, dn, val))
 242         dsdb_dn.dn = correct_dn
 243
 244         if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_target_mismatch'):
 245             self.report("Not fixing %s" % errstr)
 246             return
 247         m = ldb.Message()
 248         m.dn = dn
 249         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 250         m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
 251         if self.do_modify(m, ["show_recycled:1"],
 252                           "Failed to fix incorrect DN string on attribute %s" % attrname):
 253             self.report("Fixed incorrect DN string on attribute %s" % (attrname))
 254
 255     ################################################################
 256     # handle an unknown attribute error
 257     def err_unknown_attribute(self, obj, attrname):
 258         '''handle an unknown attribute error'''
 259         self.report("ERROR: unknown attribute '%s' in %s" % (attrname, obj.dn))
 260         if not self.confirm_all('Remove unknown attribute %s' % attrname, 'remove_all_unknown_attributes'):
 261             self.report("Not removing %s" % attrname)
 262             return
 263         m = ldb.Message()
 264         m.dn = obj.dn
 265         m['old_value'] = ldb.MessageElement([], ldb.FLAG_MOD_DELETE, attrname)
 266         if self.do_modify(m, ["relax:0", "show_recycled:1"],
 267                           "Failed to remove unknown attribute %s" % attrname):
 268             self.report("Removed unknown attribute %s" % (attrname))
 269
 270
 271     ################################################################
 272     # handle a missing backlink
 273     def err_missing_backlink(self, obj, attrname, val, backlink_name, target_dn):
 274         '''handle a missing backlink value'''
 275         self.report("ERROR: missing backlink attribute '%s' in %s for link %s in %s" % (backlink_name, target_dn, attrname, obj.dn))
 276         if not self.confirm_all('Fix missing backlink %s' % backlink_name, 'fix_all_missing_backlinks'):
 277             self.report("Not fixing missing backlink %s" % backlink_name)
 278             return
 279         m = ldb.Message()
 280         m.dn = obj.dn
 281         m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 282         m['new_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_ADD, attrname)
 283         if self.do_modify(m, ["show_recycled:1"],
 284                           "Failed to fix missing backlink %s" % backlink_name):
 285             self.report("Fixed missing backlink %s" % (backlink_name))
 286
 287
 288     ################################################################
 289     # handle a orphaned backlink
 290     def err_orphaned_backlink(self, obj, attrname, val, link_name, target_dn):
 291         '''handle a orphaned backlink value'''
 292         self.report("ERROR: orphaned backlink attribute '%s' in %s for link %s in %s" % (attrname, obj.dn, link_name, target_dn))
 293         if not self.confirm_all('Remove orphaned backlink %s' % link_name, 'fix_all_orphaned_backlinks'):
 294             self.report("Not removing orphaned backlink %s" % link_name)
 295             return
 296         m = ldb.Message()
 297         m.dn = obj.dn
 298         m['value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
 299         if self.do_modify(m, ["show_recycled:1", "relax:0"],
 300                           "Failed to fix orphaned backlink %s" % link_name):
 301             self.report("Fixed orphaned backlink %s" % (link_name))
 302
 303
 304     ################################################################
 305     # specialised checking for a dn attribute
 306     def check_dn(self, obj, attrname, syntax_oid):
 307         '''check a DN attribute for correctness'''
 308         error_count = 0
 309         for val in obj[attrname]:
 310             dsdb_dn = dsdb_Dn(self.samdb, val, syntax_oid)
 311
 312             # all DNs should have a GUID component
 313             guid = dsdb_dn.dn.get_extended_component("GUID")
 314             if guid is None:
 315                 error_count += 1
 316                 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn, "missing GUID")
 317                 continue
 318
 319             guidstr = str(misc.GUID(guid))
 320
 321             attrs=['isDeleted']
 322             linkID = self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)
 323             reverse_link_name = self.samdb_schema.get_backlink_from_lDAPDisplayName(attrname)
 324             if reverse_link_name is not None:
 325                 attrs.append(reverse_link_name)
 326
 327             # check its the right GUID
 328             try:
 329                 res = self.samdb.search(base="<GUID=%s>" % guidstr, scope=ldb.SCOPE_BASE,
 330                                         attrs=attrs, controls=["extended_dn:1:1", "show_recycled:1"])
 331             except ldb.LdbError, (enum, estr):
 332                 error_count += 1
 333                 self.err_incorrect_dn_GUID(obj.dn, attrname, val, dsdb_dn, "incorrect GUID")
 334                 continue
 335
 336             # now we have two cases - the source object might or might not be deleted
 337             is_deleted = 'isDeleted' in obj and obj['isDeleted'][0].upper() == 'TRUE'
 338             target_is_deleted = 'isDeleted' in res[0] and res[0]['isDeleted'][0].upper() == 'TRUE'
 339
 340             # the target DN is not allowed to be deleted, unless the target DN is the
 341             # special Deleted Objects container
 342             if target_is_deleted and not is_deleted and not self.is_deleted_objects_dn(dsdb_dn):
 343                 error_count += 1
 344                 self.err_deleted_dn(obj.dn, attrname, val, dsdb_dn, res[0].dn)
 345                 continue
 346
 347             # check the DN matches in string form
 348             if res[0].dn.extended_str() != dsdb_dn.dn.extended_str():
 349                 error_count += 1
 350                 self.err_dn_target_mismatch(obj.dn, attrname, val, dsdb_dn,
 351                                             res[0].dn, "incorrect string version of DN")
 352                 continue
 353
 354             # check the reverse_link is correct if there should be one
 355             if reverse_link_name is not None:
 356                 match_count = 0
 357                 if reverse_link_name in res[0]:
 358                     for v in res[0][reverse_link_name]:
 359                         if v == obj.dn.extended_str():
 360                             match_count += 1
 361                 if match_count != 1:
 362                     error_count += 1
 363                     if linkID & 1:
 364                         self.err_orphaned_backlink(obj, attrname, val, reverse_link_name, dsdb_dn.dn)
 365                     else:
 366                         self.err_missing_backlink(obj, attrname, val, reverse_link_name, dsdb_dn.dn)
 367                     continue
 368
 369         return error_count
 370
 371
 372     def get_originating_time(self, val, attid):
 373         '''Read metadata properties and return the originating time for
 374            a given attributeId.
 375
 376            :return: the originating time or 0 if not found
 377         '''
 378
 379         repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(val))
 380         obj = repl.ctr
 381
 382         for o in repl.ctr.array:
 383             if o.attid == attid:
 384                 return o.originating_change_time
 385
 386         return 0
 387
 388     def process_metadata(self, val):
 389         '''Read metadata properties and list attributes in it'''
 390
 391         list_att = []
 392
 393         repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(val))
 394         obj = repl.ctr
 395
 396         for o in repl.ctr.array:
 397             att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
 398             list_att.append(att.lower())
 399
 400         return list_att
 401
 402
 403     def fix_metadata(self, dn, attr):
 404         '''re-write replPropertyMetaData elements for a single attribute for a
 405         object. This is used to fix missing replPropertyMetaData elements'''
 406         res = self.samdb.search(base = dn, scope=ldb.SCOPE_BASE, attrs = [attr],
 407                                 controls = ["search_options:1:2", "show_recycled:1"])
 408         msg = res[0]
 409         nmsg = ldb.Message()
 410         nmsg.dn = dn
 411         nmsg[attr] = ldb.MessageElement(msg[attr], ldb.FLAG_MOD_REPLACE, attr)
 412         if self.do_modify(nmsg, ["relax:0", "provision:0", "show_recycled:1"],
 413                           "Failed to fix metadata for attribute %s" % attr):
 414             self.report("Fixed metadata for attribute %s" % attr)
 415
 416
 417     ################################################################
 418     # check one object - calls to individual error handlers above
 419     def check_object(self, dn, attrs=['*']):
 420         '''check one object'''
 421         if self.verbose:
 422             self.report("Checking object %s" % dn)
 423         if '*' in attrs:
 424             attrs.append("replPropertyMetaData")
 425
 426         res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
 427                 controls=["extended_dn:1:1", "show_recycled:1", "show_deleted:1"],
 428                                 attrs=attrs)
 429         if len(res) != 1:
 430             self.report("Object %s disappeared during check" % dn)
 431             return 1
 432         obj = res[0]
 433         error_count = 0
 434         list_attrs_from_md = []
 435         list_attrs_seen = []
 436         got_repl_property_meta_data = False
 437
 438         for attrname in obj:
 439             if attrname == 'dn':
 440                 continue
 441
 442             if str(attrname).lower() == 'replpropertymetadata':
 443                 list_attrs_from_md = self.process_metadata(obj[attrname])
 444                 got_repl_property_meta_data = True
 445                 continue
 446
 447
 448             # check for empty attributes
 449             for val in obj[attrname]:
 450                 if val == '':
 451                     self.err_empty_attribute(dn, attrname)
 452                     error_count += 1
 453                     continue
 454
 455             # get the syntax oid for the attribute, so we can can have
 456             # special handling for some specific attribute types
 457             try:
 458                 syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
 459             except Exception, msg:
 460                 self.err_unknown_attribute(obj, attrname)
 461                 error_count += 1
 462                 continue
 463
 464             flag = self.samdb_schema.get_systemFlags_from_lDAPDisplayName(attrname)
 465             if (not flag & dsdb.DS_FLAG_ATTR_NOT_REPLICATED
 466                 and not flag & dsdb.DS_FLAG_ATTR_IS_CONSTRUCTED
 467                 and not self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)):
 468                 list_attrs_seen.append(str(attrname).lower())
 469
 470             if syntax_oid in [ dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_OR_NAME,
 471                                dsdb.DSDB_SYNTAX_STRING_DN, ldb.SYNTAX_DN ]:
 472                 # it's some form of DN, do specialised checking on those
 473                 error_count += self.check_dn(obj, attrname, syntax_oid)
 474
 475             # check for incorrectly normalised attributes
 476             for val in obj[attrname]:
 477                 normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
 478                 if len(normalised) != 1 or normalised[0] != val:
 479                     self.err_normalise_mismatch(dn, attrname, obj[attrname])
 480                     error_count += 1
 481                     break
 482
 483         show_dn = True
 484         if got_repl_property_meta_data:
 485             rdn = (str(dn).split(","))[0]
 486             if rdn == "CN=Deleted Objects":
 487                 isDeletedAttId = 131120
 488                 # It's 29/12/9999 at 23:59:59 UTC as specified in MS-ADTS 7.1.1.4.2 Deleted Objects Container
 489
 490                 expectedTimeDo = 2650466015990000000
 491                 originating = self.get_originating_time(obj["replPropertyMetaData"], isDeletedAttId)
 492                 if originating != expectedTimeDo:
 493                     if self.confirm_all("Fix isDeleted originating_change_time on '%s'" % str(dn), 'fix_time_metadata'):
 494                         nmsg = ldb.Message()
 495                         nmsg.dn = dn
 496                         nmsg["isDeleted"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isDeleted")
 497                         error_count += 1
 498                         self.samdb.modify(nmsg, controls=["provision:0"])
 499
 500                     else:
 501                         self.report("Not fixing isDeleted originating_change_time on '%s'" % str(dn))
 502             for att in list_attrs_seen:
 503                 if not att in list_attrs_from_md:
 504                     if show_dn:
 505                         self.report("On object %s" % dn)
 506                         show_dn = False
 507                     error_count += 1
 508                     self.report("ERROR: Attribute %s not present in replication metadata" % att)
 509                     if not self.confirm_all("Fix missing replPropertyMetaData element '%s'" % att, 'fix_all_metadata'):
 510                         self.report("Not fixing missing replPropertyMetaData element '%s'" % att)
 511                         continue
 512                     self.fix_metadata(dn, att)
 513
 514         return error_count
 515
 516     ################################################################
 517     # check special @ROOTDSE attributes
 518     def check_rootdse(self):
 519         '''check the @ROOTDSE special object'''
 520         dn = ldb.Dn(self.samdb, '@ROOTDSE')
 521         if self.verbose:
 522             self.report("Checking object %s" % dn)
 523         res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE)
 524         if len(res) != 1:
 525             self.report("Object %s disappeared during check" % dn)
 526             return 1
 527         obj = res[0]
 528         error_count = 0
 529
 530         # check that the dsServiceName is in GUID form
 531         if not 'dsServiceName' in obj:
 532             self.report('ERROR: dsServiceName missing in @ROOTDSE')
 533             return error_count+1
 534
 535         if not obj['dsServiceName'][0].startswith('<GUID='):
 536             self.report('ERROR: dsServiceName not in GUID form in @ROOTDSE')
 537             error_count += 1
 538             if not self.confirm('Change dsServiceName to GUID form?'):
 539                 return error_count
 540             res = self.samdb.search(base=ldb.Dn(self.samdb, obj['dsServiceName'][0]),
 541                                     scope=ldb.SCOPE_BASE, attrs=['objectGUID'])
 542             guid_str = str(ndr_unpack(misc.GUID, res[0]['objectGUID'][0]))
 543             m = ldb.Message()
 544             m.dn = dn
 545             m['dsServiceName'] = ldb.MessageElement("<GUID=%s>" % guid_str,
 546                                                     ldb.FLAG_MOD_REPLACE, 'dsServiceName')
 547             if self.do_modify(m, [], "Failed to change dsServiceName to GUID form", validate=False):
 548                 self.report("Changed dsServiceName to GUID form")
 549         return error_count
 550
 551
 552     ###############################################
 553     # re-index the database
 554     def reindex_database(self):
 555         '''re-index the whole database'''
 556         m = ldb.Message()
 557         m.dn = ldb.Dn(self.samdb, "@ATTRIBUTES")
 558         m['add']    = ldb.MessageElement('NONE', ldb.FLAG_MOD_ADD, 'force_reindex')
 559         m['delete'] = ldb.MessageElement('NONE', ldb.FLAG_MOD_DELETE, 'force_reindex')
 560         return self.do_modify(m, [], 're-indexed database', validate=False)