python/samba/netcmd/dbcheck.py

   1 # Samba4 AD database checker
   2 #
   3 # Copyright (C) Andrew Tridgell 2011
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19 import ldb
  20 import sys
  21 import samba.getopt as options
  22 from samba.auth import system_session
  23 from samba.samdb import SamDB
  24 from samba.netcmd import (
  25     Command,
  26     CommandError,
  27     Option
  28 )
  29 from samba.dbchecker import dbcheck
  30
  31
  32 class cmd_dbcheck(Command):
  33     """Check local AD database for errors."""
  34     synopsis = "%prog [<DN>] [options]"
  35
  36     takes_optiongroups = {
  37         "sambaopts": options.SambaOptions,
  38         "versionopts": options.VersionOptions,
  39         "credopts": options.CredentialsOptionsDouble,
  40     }
  41
  42     def process_yes(option, opt, value, parser):
  43         assert value is None
  44         rargs = parser.rargs
  45         if rargs:
  46             arg = rargs[0]
  47             if ((arg[:2] == "--" and len(arg) > 2) or
  48                 (arg[:1] == "-" and len(arg) > 1 and arg[1] != "-")):
  49                 setattr(parser.values, "yes", True)
  50             else:
  51                 setattr(parser.values, "yes_rules", arg.split())
  52                 del rargs[0]
  53         else:
  54             setattr(parser.values, "yes", True)
  55
  56     takes_args = ["DN?"]
  57
  58     takes_options = [
  59         Option("--scope", dest="scope", default="SUB",
  60                help="Pass search scope that builds DN list. Options: SUB, ONE, BASE"),
  61         Option("--fix", dest="fix", default=False, action='store_true',
  62                help='Fix any errors found'),
  63         Option("--yes", action='callback', callback=process_yes,
  64                help="don't confirm changes individually. Applies all as a single transaction (will not succeed if any errors are found)"),
  65         Option("--cross-ncs", dest="cross_ncs", default=False, action='store_true',
  66                help="cross naming context boundaries"),
  67         Option("-v", "--verbose", dest="verbose", action="store_true", default=False,
  68                help="Print more details of checking"),
  69         Option("-q", "--quiet", action="store_true", default=False,
  70                help="don't print details of checking"),
  71         Option("--attrs", dest="attrs", default=None, help="list of attributes to check (space separated)"),
  72         Option("--reindex", dest="reindex", default=False, action="store_true", help="force database re-index"),
  73         Option("--force-modules", dest="force_modules", default=False, action="store_true", help="force loading of Samba modules and ignore the @MODULES record (for very old databases)"),
  74         Option("--reset-well-known-acls", dest="reset_well_known_acls", default=False, action="store_true", help="reset ACLs on objects with well known default ACL values to the default"),
  75         Option("--quick-membership-checks", dest="quick_membership_checks",
  76                help=("Skips missing/orphaned memberOf backlinks checks, "
  77                      "but speeds up dbcheck dramatically for domains with "
  78                      "large groups"),
  79                default=False, action="store_true"),
  80         Option("-H", "--URL", help="LDB URL for database or target server (defaults to local SAM database)",
  81                type=str, metavar="URL", dest="H"),
  82     ]
  83
  84     def run(self, DN=None, H=None, verbose=False, fix=False, yes=False,
  85             cross_ncs=False, quiet=False,
  86             scope="SUB", credopts=None, sambaopts=None, versionopts=None,
  87             attrs=None, reindex=False, force_modules=False,
  88             quick_membership_checks=False,
  89             reset_well_known_acls=False, yes_rules=[]):
  90
  91         lp = sambaopts.get_loadparm()
  92
  93         over_ldap = H is not None and H.startswith('ldap')
  94
  95         if over_ldap:
  96             creds = credopts.get_credentials(lp, fallback_machine=True)
  97         else:
  98             creds = None
  99
 100         if force_modules:
 101             samdb = SamDB(session_info=system_session(), url=H,
 102                           credentials=creds, lp=lp, options=["modules=samba_dsdb"])
 103         else:
 104             try:
 105                 samdb = SamDB(session_info=system_session(), url=H,
 106                               credentials=creds, lp=lp)
 107             except:
 108                 raise CommandError("Failed to connect to DB at %s.  If this is a really old sam.ldb (before alpha9), then try again with --force-modules" % H)
 109
 110         if H is None or not over_ldap:
 111             samdb_schema = samdb
 112         else:
 113             samdb_schema = SamDB(session_info=system_session(), url=None,
 114                                  credentials=creds, lp=lp)
 115
 116         scope_map = {"SUB": ldb.SCOPE_SUBTREE, "BASE": ldb.SCOPE_BASE, "ONE": ldb.SCOPE_ONELEVEL}
 117         scope = scope.upper()
 118         if scope not in scope_map:
 119             raise CommandError("Unknown scope %s" % scope)
 120         search_scope = scope_map[scope]
 121
 122         controls = ['show_deleted:1']
 123         if over_ldap:
 124             controls.append('paged_results:1:1000')
 125         if cross_ncs:
 126             controls.append("search_options:1:2")
 127
 128         if not attrs:
 129             attrs = ['*']
 130         else:
 131             attrs = attrs.split()
 132
 133         started_transaction = False
 134         if yes and fix:
 135             samdb.transaction_start()
 136             started_transaction = True
 137         try:
 138             chk = dbcheck(samdb, samdb_schema=samdb_schema, verbose=verbose,
 139                           fix=fix, yes=yes, quiet=quiet,
 140                           in_transaction=started_transaction,
 141                           quick_membership_checks=quick_membership_checks,
 142                           reset_well_known_acls=reset_well_known_acls)
 143
 144             for option in yes_rules:
 145                 if hasattr(chk, option):
 146                     setattr(chk, option, 'ALL')
 147                 else:
 148                     raise CommandError("Invalid fix rule %s" % option)
 149
 150             if reindex:
 151                 self.outf.write("Re-indexing...\n")
 152                 error_count = 0
 153                 if chk.reindex_database():
 154                     self.outf.write("completed re-index OK\n")
 155
 156             elif force_modules:
 157                 self.outf.write("Resetting @MODULES...\n")
 158                 error_count = 0
 159                 if chk.reset_modules():
 160                     self.outf.write("completed @MODULES reset OK\n")
 161
 162             else:
 163                 error_count = chk.check_database(DN=DN, scope=search_scope,
 164                                                  controls=controls, attrs=attrs)
 165         except:
 166             if started_transaction:
 167                 samdb.transaction_cancel()
 168             raise
 169
 170         if started_transaction:
 171             samdb.transaction_commit()
 172
 173         if error_count != 0:
 174             sys.exit(1)