source3/winbindd/idmap_rw.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  *
   4  * ID mapping: abstract r/w new-mapping mechanism
   5  *
   6  * Copyright (C) Michael Adam 2010
   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 #include "includes.h"
  23 #include "winbindd.h"
  24 #include "idmap.h"
  25 #include "idmap_rw.h"
  26 #include "libcli/security/dom_sid.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_IDMAP
  30
  31 NTSTATUS idmap_rw_new_mapping(struct idmap_domain *dom,
  32                               struct idmap_rw_ops *ops,
  33                               struct id_map *map)
  34 {
  35         struct dom_sid_buf buf;
  36         NTSTATUS status;
  37
  38         if (map == NULL) {
  39                 return NT_STATUS_INVALID_PARAMETER;
  40         }
  41
  42         if (map->sid == NULL) {
  43                 return NT_STATUS_INVALID_PARAMETER;
  44         }
  45
  46         switch (map->xid.type) {
  47         case ID_TYPE_NOT_SPECIFIED:
  48                 /*
  49                  * We need to know if we need a user or group mapping.
  50                  * Ask the winbindd parent to provide a valid type hint.
  51                  */
  52                 DBG_INFO("%s ID_TYPE_NOT_SPECIFIED => ID_REQUIRE_TYPE\n",
  53                          dom_sid_str_buf(map->sid, &buf));
  54                 map->status = ID_REQUIRE_TYPE;
  55                 return NT_STATUS_SOME_NOT_MAPPED;
  56
  57         case ID_TYPE_BOTH:
  58                 /*
  59                  * For now we still require
  60                  * an explicit type as hint
  61                  * and don't support ID_TYPE_BOTH
  62                  */
  63                 DBG_INFO("%s ID_TYPE_BOTH => ID_REQUIRE_TYPE\n",
  64                          dom_sid_str_buf(map->sid, &buf));
  65                 map->status = ID_REQUIRE_TYPE;
  66                 return NT_STATUS_SOME_NOT_MAPPED;
  67
  68         case ID_TYPE_UID:
  69                 break;
  70
  71         case ID_TYPE_GID:
  72                 break;
  73
  74         default:
  75                 return NT_STATUS_INVALID_PARAMETER;
  76         }
  77
  78         status = ops->get_new_id(dom, &map->xid);
  79
  80         if (!NT_STATUS_IS_OK(status)) {
  81                 DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(status)));
  82                 return status;
  83         }
  84
  85         DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
  86                    dom_sid_str_buf(map->sid, &buf),
  87                    (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
  88                    (unsigned long)map->xid.id));
  89
  90         map->status = ID_MAPPED;
  91         status = ops->set_mapping(dom, map);
  92
  93         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_COLLISION)) {
  94                 struct id_map *ids[2];
  95                 DEBUG(5, ("Mapping for %s exists - retrying to map sid\n",
  96                           dom_sid_str_buf(map->sid, &buf)));
  97                 ids[0] = map;
  98                 ids[1] = NULL;
  99                 status = dom->methods->sids_to_unixids(dom, ids);
 100         }
 101
 102         if (!NT_STATUS_IS_OK(status)) {
 103                 DEBUG(3, ("Could not store the new mapping: %s\n",
 104                           nt_errstr(status)));
 105                 return status;
 106         }
 107
 108         return NT_STATUS_OK;
 109 }