s4:provision Pass in the invoication ID and NTDS Settings DN to Schema()

By putting these values into the cache on the LDB, this reduces some
of the noise in provision, particularly with the LDAP backend.

Andrew Bartlett

source4/scripting/python/samba/provision.py

@@ -871,10 +871,9 @@ def setup_samdb(path, setup_path, session_info, provision_backend, lp,
     if schema is None:
         schema = Schema(setup_path, domainsid, schemadn=names.schemadn, serverdn=names.serverdn)
 
-    # Load the database, but importantly, use Ldb not SamDB as we don't want to
-    # load the global schema
-    samdb = Ldb(session_info=session_info, 
-                credentials=provision_backend.credentials, lp=lp)
+    # Load the database, but don's load the global schema and don't connect quite yet
+    samdb = SamDB(session_info=session_info, url=None, auto_connect=False,
+                  credentials=provision_backend.credentials, lp=lp, global_schema=False)
 
     message("Pre-loading the Samba 4 and AD schema")
 
@@ -901,6 +900,7 @@ def setup_samdb(path, setup_path, session_info, provision_backend, lp,
 
         samdb.set_domain_sid(str(domainsid))
         samdb.set_invocation_id(invocationid)
+        samdb.set_ntds_settings_dn("CN=NTDS Settings,%s" % names.serverdn)
 
         message("Adding DomainDN: %s" % names.domaindn)
 
@@ -1236,7 +1236,7 @@ def provision(setup_dir, message, session_info,
 
     ldapi_url = "ldapi://%s" % urllib.quote(paths.s4_ldapi_path, safe="")
  
-    schema = Schema(setup_path, domainsid, schemadn=names.schemadn,
+    schema = Schema(setup_path, domainsid, invocationid=invocationid, schemadn=names.schemadn,
                     serverdn=names.serverdn)
     
     if backend_type == "ldb":

source4/scripting/python/samba/samdb.py

@@ -37,9 +37,11 @@ class SamDB(samba.Ldb):
     """The SAM database."""
 
     def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
-                 credentials=None, flags=0, options=None, global_schema=True):
+                 credentials=None, flags=0, options=None, global_schema=True, auto_connect=True):
         self.lp = lp
-        if url is None:
+        if not auto_connect:
+            url = None
+        elif url is None and lp is not None:
             url = lp.get("sam database")
 
         super(SamDB, self).__init__(url=url, lp=lp, modules_dir=modules_dir,
@@ -50,7 +52,10 @@ class SamDB(samba.Ldb):
             dsdb.dsdb_set_global_schema(self)
 
     def connect(self, url=None, flags=0, options=None):
-        super(SamDB, self).connect(url=self.lp.private_path(url), flags=flags,
+        if self.lp is not None:
+            url = self.lp.private_path(url)
+
+        super(SamDB, self).connect(url=url, flags=flags,
                 options=options)
 
     def domain_dn(self):
@@ -261,6 +266,15 @@ accountExpires: %u
         "Get the invocation_id id"
         return dsdb.samdb_ntds_invocation_id(self)
 
+    def set_ntds_settings_dn(self, ntds_settings_dn):
+        """Set the NTDS Settings DN, as would be returned on the dsServiceName rootDSE attribute
+
+        This allows the DN to be set before the database fully exists
+
+        :param ntds_settings_dn: The new DN to use
+        """
+        dsdb.samdb_set_ntds_settings_dn(self, ntds_settings_dn)
+
     invocation_id = property(get_invocation_id, set_invocation_id)
 
     domain_sid = property(get_domain_sid, set_domain_sid)

source4/scripting/python/samba/schema.py

@@ -26,6 +26,7 @@ from base64 import b64encode
 from ms_schema import read_ms_schema
 from samba.dcerpc import security
 from samba import read_and_sub_file, substitute_var, check_all_substituted
+from samba.samdb import SamDB
 from samba import Ldb
 from samba.ndr import ndr_pack
 from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL
@@ -52,7 +53,7 @@ def get_schema_descriptor(domain_sid):
    
 class Schema(object):
 
-    def __init__(self, setup_path, domain_sid, schemadn=None,
+    def __init__(self, setup_path, domain_sid, invocationid=None, schemadn=None,
                  serverdn=None, files=None, prefixmap=None):
         """Load schema for the SamDB from the AD schema files and samba4_schema.ldif
         
@@ -65,7 +66,12 @@ class Schema(object):
         """
 
         self.schemadn = schemadn
-        self.ldb = Ldb()
+        self.ldb = SamDB(global_schema=False)
+        if serverdn is not None:
+            self.ldb.set_ntds_settings_dn("CN=NTDS Settings,%s" % serverdn)
+        if invocationid is not None:
+            self.ldb.set_invocation_id(invocationid)
+
         self.schema_data = read_ms_schema(
             setup_path('ad-schema/MS-AD_Schema_2K8_R2_Attributes.txt'),
             setup_path('ad-schema/MS-AD_Schema_2K8_R2_Classes.txt'))
@@ -100,7 +106,7 @@ class Schema(object):
         self.ldb.set_schema_from_ldif(prefixmap_ldif, self.schema_data)
 
     def write_to_tmp_ldb(self, schemadb_path):
-        self.ldb.connect(schemadb_path)
+        self.ldb.connect(url=schemadb_path)
         self.ldb.transaction_start()
         try:
             self.ldb.add_ldif("""dn: @ATTRIBUTES