source4/scripting/python/samba/netcmd/fsmo.py

   1 #!/usr/bin/python
   2 #
   3 # Changes a FSMO role owner
   4 #
   5 # Copyright Nadezhda Ivanova 2009
   6 # Copyright Jelmer Vernooij 2009
   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 samba.getopt as options
  23 import ldb
  24 from ldb import LdbError
  25
  26 from samba.auth import system_session
  27 from samba.netcmd import (
  28     Command,
  29     CommandError,
  30     Option,
  31     )
  32 from samba.samdb import SamDB
  33
  34 class cmd_fsmo(Command):
  35     """Makes the targer DC transfer or seize a fsmo role"""
  36
  37     synopsis = "(show | transfer <options> | seize <options>)"
  38
  39     takes_optiongroups = {
  40         "sambaopts": options.SambaOptions,
  41         "credopts": options.CredentialsOptions,
  42         "versionopts": options.VersionOptions,
  43         }
  44
  45     takes_options = [
  46         Option("--host", help="LDB URL for database or target server", type=str),
  47         Option("--force", help="Force seizing of the role without attempting to transfer first.", action="store_true"),
  48         Option("--role", type="choice", choices=["rid", "pdc", "infrastructure","schema","naming","all"],
  49                help="""The FSMO role to seize or transfer.\n
  50 rid=RidAllocationMasterRole\n
  51 schema=SchemaMasterRole\n
  52 pdc=PdcEmulationMasterRole\n
  53 naming=DomainNamingMasterRole\n
  54 infrastructure=InfrastructureMasterRole\n
  55 all=all of the above"""),
  56         ]
  57
  58     takes_args = ["subcommand"]
  59
  60     def transfer_role(self, role, samdb):
  61         m = ldb.Message()
  62         m.dn = ldb.Dn(samdb, "")
  63         if role == "rid":
  64             m["becomeRidMaster"]= ldb.MessageElement(
  65                 "1", ldb.FLAG_MOD_REPLACE,
  66                 "becomeRidMaster")
  67         elif role == "pdc":
  68             domain_dn = SamDB.domain_dn(samdb)
  69             res = samdb.search(domain_dn,
  70                                scope=ldb.SCOPE_BASE, attrs=["objectSid"])
  71             assert(len(res) == 1)
  72             sid = res[0]["objectSid"][0]
  73             m["becomePdc"]= ldb.MessageElement(
  74                 sid, ldb.FLAG_MOD_REPLACE,
  75                 "becomePdc")
  76         elif role == "naming":
  77             m["becomeDomainMaster"]= ldb.MessageElement(
  78                 "1", ldb.FLAG_MOD_REPLACE,
  79                 "becomeDomainMaster")
  80             samdb.modify(m)
  81         elif role == "infrastructure":
  82             m["becomeInfrastructureMaster"]= ldb.MessageElement(
  83                 "1", ldb.FLAG_MOD_REPLACE,
  84                 "becomeInfrastructureMaster")
  85         elif role == "schema":
  86             m["becomeSchemaMaster"]= ldb.MessageElement(
  87                 "1", ldb.FLAG_MOD_REPLACE,
  88                 "becomeSchemaMaster")
  89         else:
  90             raise CommandError("Invalid FSMO role.")
  91         samdb.modify(m)
  92
  93     def seize_role(self, role, samdb, force):
  94         res = samdb.search("",
  95                            scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
  96         assert(len(res) == 1)
  97         serviceName = res[0]["dsServiceName"][0]
  98         domain_dn = SamDB.domain_dn(samdb)
  99         m = ldb.Message()
 100         if role == "rid":
 101             m.dn = ldb.Dn(samdb, self.rid_dn)
 102         elif role == "pdc":
 103             m.dn = ldb.Dn(samdb, domain_dn)
 104         elif role == "naming":
 105             m.dn = ldb.Dn(samdb, self.naming_dn)
 106         elif role == "infrastructure":
 107             m.dn = ldb.Dn(samdb, self.indrastructure_dn)
 108         elif role == "schema":
 109             m.dn = ldb.Dn(samdb, self.schema_dn)
 110         else:
 111             raise CommandError("Invalid FSMO role.")
 112         #first try to transfer to avoid problem if the owner is still active
 113         if force is None:
 114             self.message("Attempting transfer...")
 115             try:
 116                 self.transfer_role(role, samdb)
 117             except LdbError, (num, _):
 118             #transfer failed, use the big axe...
 119                 self.message("Transfer unsuccessfull, seizing...")
 120                 m["fSMORoleOwner"]= ldb.MessageElement(
 121                     serviceName, ldb.FLAG_MOD_REPLACE,
 122                     "fSMORoleOwner")
 123                 samdb.modify(m)
 124             else:
 125                 self.message("Transfer succeeded.")
 126         else:
 127             self.message("Will not attempt transfer, seizing...")
 128             m["fSMORoleOwner"]= ldb.MessageElement(
 129                 serviceName, ldb.FLAG_MOD_REPLACE,
 130                 "fSMORoleOwner")
 131             samdb.modify(m)
 132
 133     def run(self, subcommand, force=None, host=None, role=None,
 134             credopts=None, sambaopts=None, versionopts=None):
 135         lp = sambaopts.get_loadparm()
 136         creds = credopts.get_credentials(lp)
 137
 138         if host is not None:
 139             url = host
 140         else:
 141             url = lp.get("sam database")
 142
 143         samdb = SamDB(url=url, session_info=system_session(),
 144             credentials=creds, lp=lp)
 145
 146         domain_dn = SamDB.domain_dn(samdb)
 147         self.infrastructure_dn = "CN=Infrastructure," + domain_dn
 148         self.naming_dn = "CN=Partitions,CN=Configuration," + domain_dn
 149         self.schema_dn = "CN=Schema,CN=Configuration," + domain_dn
 150         self.rid_dn = "CN=RID Manager$,CN=System," + domain_dn
 151
 152         res = samdb.search(self.infrastructure_dn,
 153                            scope=ldb.SCOPE_BASE, attrs=["fSMORoleOwner"])
 154         assert(len(res) == 1)
 155         self.infrastructureMaster = res[0]["fSMORoleOwner"][0]
 156
 157         res = samdb.search(domain_dn,
 158                            scope=ldb.SCOPE_BASE, attrs=["fSMORoleOwner"])
 159         assert(len(res) == 1)
 160         self.pdcEmulator = res[0]["fSMORoleOwner"][0]
 161
 162         res = samdb.search(self.naming_dn,
 163                            scope=ldb.SCOPE_BASE, attrs=["fSMORoleOwner"])
 164         assert(len(res) == 1)
 165         self.namingMaster = res[0]["fSMORoleOwner"][0]
 166
 167         res = samdb.search(self.schema_dn,
 168                            scope=ldb.SCOPE_BASE, attrs=["fSMORoleOwner"])
 169         assert(len(res) == 1)
 170         self.schemaMaster = res[0]["fSMORoleOwner"][0]
 171
 172         res = samdb.search(self.rid_dn,
 173                            scope=ldb.SCOPE_BASE, attrs=["fSMORoleOwner"])
 174         assert(len(res) == 1)
 175         self.ridMaster = res[0]["fSMORoleOwner"][0]
 176
 177         if subcommand == "show":
 178             self.message("InfrastructureMasterRole owner: " + self.infrastructureMaster)
 179             self.message("RidAllocationMasterRole owner: " + self.ridMaster)
 180             self.message("PdcEmulationMasterRole owner: " + self.pdcEmulator)
 181             self.message("DomainNamingMasterRole owner: " + self.namingMaster)
 182             self.message("SchemaMasterRole owner: " + self.schemaMaster)
 183         elif subcommand == "transfer":
 184             if role == "all":
 185                 self.transfer_role("rid", samdb)
 186                 self.transfer_role("pdc", samdb)
 187                 self.transfer_role("naming", samdb)
 188                 self.transfer_role("infrastructure", samdb)
 189                 self.transfer_role("schema", samdb)
 190             else:
 191                 self.transfer_role(role, samdb)
 192         elif subcommand == "seize":
 193             if role == "all":
 194                 self.seize_role("rid", samdb, force)
 195                 self.seize_role("pdc", samdb, force)
 196                 self.seize_role("naming", samdb, force)
 197                 self.seize_role("infrastructure", samdb, force)
 198                 self.zeize_role("schema", samdb, force)
 199             else:
 200                 self.seize_role(role, samdb, force)
 201         else:
 202             raise CommandError("Wrong argument '%s'!" % subcommand)