source4/dsdb/samdb/ldb_modules/new_partition.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Simo Sorce  2004-2008
   5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   6    Copyright (C) Andrew Tridgell 2005
   7    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /*
  24  *  Name: ldb
  25  *
  26  *  Component: ldb new partition module
  27  *
  28  *  Description: Handle the add of new partitions
  29  *
  30  *  Author: Andrew Bartlett
  31  */
  32
  33 #include "includes.h"
  34 #include "ldb.h"
  35 #include "ldb_module.h"
  36 #include "librpc/gen_ndr/ndr_misc.h"
  37 #include "dsdb/samdb/samdb.h"
  38 #include "../libds/common/flags.h"
  39 #include "dsdb/common/util.h"
  40
  41 struct np_context {
  42         struct ldb_module *module;
  43         struct ldb_request *req;
  44         struct ldb_request *search_req;
  45         struct ldb_request *part_add;
  46 };
  47
  48 static int np_part_mod_callback(struct ldb_request *req, struct ldb_reply *ares)
  49 {
  50         struct ldb_context *ldb;
  51         struct np_context *ac;
  52
  53         ac = talloc_get_type(req->context, struct np_context);
  54         ldb = ldb_module_get_ctx(ac->module);
  55
  56         if (!ares) {
  57                 return ldb_module_done(ac->req, NULL, NULL,
  58                                         LDB_ERR_OPERATIONS_ERROR);
  59         }
  60
  61         /* We just want to update the @PARTITIONS record if the value does not exist */
  62         if (ares->error != LDB_SUCCESS && ares->error != LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS) {
  63                 return ldb_module_done(ac->req, ares->controls,
  64                                         ares->response, ares->error);
  65         }
  66
  67         if (ares->type != LDB_REPLY_DONE) {
  68                 ldb_asprintf_errstring(ldb, "Invalid LDB reply type %d", ares->type);
  69                 return ldb_module_done(ac->req, NULL, NULL,
  70                                         LDB_ERR_OPERATIONS_ERROR);
  71         }
  72
  73         ldb_reset_err_string(ldb);
  74
  75         /* Do the original add */
  76         return ldb_next_request(ac->module, ac->req);
  77 }
  78
  79 static int np_part_search_callback(struct ldb_request *req, struct ldb_reply *ares)
  80 {
  81         struct ldb_context *ldb;
  82         struct np_context *ac;
  83         struct dsdb_create_partition_exop *ex_op;
  84         int ret;
  85
  86         ac = talloc_get_type(req->context, struct np_context);
  87         ldb = ldb_module_get_ctx(ac->module);
  88
  89         if (!ares) {
  90                 return ldb_module_done(ac->req, NULL, NULL,
  91                                         LDB_ERR_OPERATIONS_ERROR);
  92         }
  93
  94         /* If this already exists, we really don't want to create a
  95          * partition - it would allow a duplicate entry to be
  96          * created */
  97         if (ares->error != LDB_ERR_NO_SUCH_OBJECT) {
  98                 if (ares->error == LDB_SUCCESS) {
  99                         return ldb_module_done(ac->req, ares->controls,
 100                                                ares->response, LDB_ERR_ENTRY_ALREADY_EXISTS);
 101                 } else {
 102                         return ldb_module_done(ac->req, ares->controls,
 103                                                ares->response, ares->error);
 104                 }
 105         }
 106
 107         if (ares->type != LDB_REPLY_DONE) {
 108                 ldb_set_errstring(ldb, "Invalid reply type - we must not get a result here!");
 109                 return ldb_module_done(ac->req, NULL, NULL,
 110                                         LDB_ERR_OPERATIONS_ERROR);
 111         }
 112
 113         ldb_reset_err_string(ldb);
 114
 115         /* Now that we know it does not exist, we can try and create the partition */
 116         ex_op = talloc(ac, struct dsdb_create_partition_exop);
 117         if (ex_op == NULL) {
 118                 return ldb_oom(ldb);
 119         }
 120
 121         ex_op->new_dn = ac->req->op.add.message->dn;
 122
 123         ret = ldb_build_extended_req(&ac->part_add,
 124                                      ldb, ac, DSDB_EXTENDED_CREATE_PARTITION_OID, ex_op,
 125                                      NULL, ac, np_part_mod_callback, req);
 126
 127         /* if the parent was asking for a partial replica, then we
 128          * need the extended operation to also ask for a partial
 129          * replica */
 130         if (ldb_request_get_control(req, DSDB_CONTROL_PARTIAL_REPLICA)) {
 131                 ret = dsdb_request_add_controls(ac->part_add, DSDB_MODIFY_PARTIAL_REPLICA);
 132                 if (ret != LDB_SUCCESS) {
 133                         return ret;
 134                 }
 135         }
 136
 137
 138         LDB_REQ_SET_LOCATION(ac->part_add);
 139         if (ret != LDB_SUCCESS) {
 140                 return ret;
 141         }
 142
 143         return ldb_next_request(ac->module, ac->part_add);
 144 }
 145
 146 /* add_record: add instancetype attribute */
 147 static int new_partition_add(struct ldb_module *module, struct ldb_request *req)
 148 {
 149         struct ldb_context *ldb;
 150         struct np_context *ac;
 151         int ret;
 152
 153         ldb = ldb_module_get_ctx(module);
 154
 155         ldb_debug(ldb, LDB_DEBUG_TRACE, "new_partition_add\n");
 156
 157         /* do not manipulate our control entries */
 158         if (ldb_dn_is_special(req->op.add.message->dn)) {
 159                 return ldb_next_request(module, req);
 160         }
 161
 162         if (ldb_msg_find_element(req->op.add.message, "instanceType")) {
 163                 /* This needs to be 'static' to ensure it does not move, and is not on the stack */
 164                 static const char *no_attrs[] = { NULL };
 165                 uint32_t instanceType = ldb_msg_find_attr_as_uint(req->op.add.message, "instanceType", 0);
 166
 167                 if (!(instanceType & INSTANCE_TYPE_IS_NC_HEAD)) {
 168                         return ldb_next_request(module, req);
 169                 }
 170
 171                 if (ldb_msg_find_attr_as_bool(req->op.add.message, "isDeleted", false)) {
 172                         DEBUG(0,(__location__ ": Skipping deleted partition %s\n",
 173                                  ldb_dn_get_linearized(req->op.add.message->dn)));
 174                         return ldb_next_request(module, req);
 175                 }
 176
 177                 /* Create an @PARTITIONS record for this partition -
 178                  * by asking the partitions module to do so via an
 179                  * extended operation, after first checking if the
 180                  * record already exists */
 181                 ac = talloc(req, struct np_context);
 182                 if (ac == NULL) {
 183                         return ldb_oom(ldb);
 184                 }
 185                 ac->module = module;
 186                 ac->req = req;
 187
 188                 ret = ldb_build_search_req(&ac->search_req, ldb, ac, req->op.add.message->dn,
 189                                            LDB_SCOPE_BASE, NULL, no_attrs, req->controls, ac,
 190                                            np_part_search_callback,
 191                                            req);
 192                 LDB_REQ_SET_LOCATION(ac->search_req);
 193                 if (ret != LDB_SUCCESS) {
 194                         return ret;
 195                 }
 196
 197                 return ldb_next_request(module, ac->search_req);
 198         }
 199
 200         /* go on with the call chain */
 201         return ldb_next_request(module, req);
 202 }
 203
 204 static const struct ldb_module_ops ldb_new_partition_module_ops = {
 205         .name          = "new_partition",
 206         .add           = new_partition_add,
 207 };
 208
 209 int ldb_new_partition_module_init(const char *version)
 210 {
 211         LDB_MODULE_CHECK_VERSION(version);
 212         return ldb_register_module(&ldb_new_partition_module_ops);
 213 }