NEX-18462 SMB can't view ACL if posix ID can't be mapped
Review by: Gordon Ross <gordon.ross@nexenta.com>
Review by: Evan Layton <evan.layton@nexenta.com>

*** 20,29 ****
--- 20,31 ----
   */
  
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  *
+  * Copyright 2018 Nexenta Systems, Inc.
   */
  
  /*
   * Windows to Solaris Identity Mapping kernel API
   * This module provides an API to map Windows SIDs to
*** 1305,1314 ****
--- 1307,1322 ----
                              id->idmap_id_u.sid.prefix);
                          if (result->sid_prefix && result->rid) {
                                  *result->sid_prefix = sid_prefix;
                                  *result->rid = id->idmap_id_u.sid.rid;
                          }
+                         if (*result->stat == IDMAP_ERR_NOTFOUND &&
+                             sid_prefix != NULL) {
+                                 /* IDMAP generated a local SID. Use it. */
+                                 *result->stat = IDMAP_SUCCESS;
+                         }
+ 
                          if (*result->stat == IDMAP_SUCCESS &&
                              request->id1.idtype == IDMAP_UID)
                                  kidmap_cache_add_sid2uid(
                                      cache, sid_prefix,
                                      id->idmap_id_u.sid.rid,