source4/dsdb/repl/replicated_objects.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    Helper functions for applying replicated objects
   4
   5    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include <ldb_errors.h>
  25 #include "../lib/util/dlinklist.h"
  26 #include "librpc/gen_ndr/ndr_misc.h"
  27 #include "librpc/gen_ndr/ndr_drsuapi.h"
  28 #include "librpc/gen_ndr/ndr_drsblobs.h"
  29 #include "../lib/crypto/crypto.h"
  30 #include "../libcli/drsuapi/drsuapi.h"
  31 #include "libcli/auth/libcli_auth.h"
  32 #include "param/param.h"
  33
  34 /**
  35  * Multi-pass working schema creation
  36  * Function will:
  37  *  - shallow copy initial schema supplied
  38  *  - create a working schema in multiple passes
  39  *    until all objects are resolved
  40  * Working schema is a schema with Attributes, Classes
  41  * and indexes, but w/o subClassOf, possibleSupperiors etc.
  42  * It is to be used just us cache for converting attribute values.
  43  */
  44 WERROR dsdb_repl_make_working_schema(struct ldb_context *ldb,
  45                                      const struct dsdb_schema *initial_schema,
  46                                      const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
  47                                      uint32_t object_count,
  48                                      const struct drsuapi_DsReplicaObjectListItemEx *first_object,
  49                                      const DATA_BLOB *gensec_skey,
  50                                      TALLOC_CTX *mem_ctx,
  51                                      struct dsdb_schema **_schema_out)
  52 {
  53         struct schema_list {
  54                 struct schema_list *next, *prev;
  55                 const struct drsuapi_DsReplicaObjectListItemEx *obj;
  56         };
  57
  58         WERROR werr;
  59         struct dsdb_schema_prefixmap *pfm_remote;
  60         struct schema_list *schema_list = NULL, *schema_list_item, *schema_list_next_item;
  61         struct dsdb_schema *working_schema;
  62         const struct drsuapi_DsReplicaObjectListItemEx *cur;
  63         int ret, pass_no;
  64         uint32_t ignore_attids[] = {
  65                         DRSUAPI_ATTID_auxiliaryClass,
  66                         DRSUAPI_ATTID_mayContain,
  67                         DRSUAPI_ATTID_mustContain,
  68                         DRSUAPI_ATTID_possSuperiors,
  69                         DRSUAPI_ATTID_systemPossSuperiors,
  70                         DRSUAPI_ATTID_INVALID
  71         };
  72
  73         /* make a copy of the iniatial_scheam so we don't mess with it */
  74         working_schema = dsdb_schema_copy_shallow(mem_ctx, ldb, initial_schema);
  75         if (!working_schema) {
  76                 DEBUG(0,(__location__ ": schema copy failed!\n"));
  77                 return WERR_NOMEM;
  78         }
  79
  80         /* we are going to need remote prefixMap for decoding */
  81         werr = dsdb_schema_pfm_from_drsuapi_pfm(mapping_ctr, true,
  82                                                 mem_ctx, &pfm_remote, NULL);
  83         if (!W_ERROR_IS_OK(werr)) {
  84                 DEBUG(0,(__location__ ": Failed to decode remote prefixMap: %s",
  85                          win_errstr(werr)));
  86                 return werr;
  87         }
  88
  89         /* create a list of objects yet to be converted */
  90         for (cur = first_object; cur; cur = cur->next_object) {
  91                 schema_list_item = talloc(mem_ctx, struct schema_list);
  92                 schema_list_item->obj = cur;
  93                 DLIST_ADD_END(schema_list, schema_list_item, struct schema_list);
  94         }
  95
  96         /* resolve objects until all are resolved and in local schema */
  97         pass_no = 1;
  98
  99         while (schema_list) {
 100                 uint32_t converted_obj_count = 0;
 101                 uint32_t failed_obj_count = 0;
 102                 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 103                 W_ERROR_HAVE_NO_MEMORY(tmp_ctx);
 104
 105                 for (schema_list_item = schema_list; schema_list_item; schema_list_item=schema_list_next_item) {
 106                         struct dsdb_extended_replicated_object object;
 107
 108                         cur = schema_list_item->obj;
 109
 110                         /* Save the next item, now we have saved out
 111                          * the current one, so we can DLIST_REMOVE it
 112                          * safely */
 113                         schema_list_next_item = schema_list_item->next;
 114
 115                         /*
 116                          * Convert the objects into LDB messages using the
 117                          * schema we have so far. It's ok if we fail to convert
 118                          * an object. We should convert more objects on next pass.
 119                          */
 120                         werr = dsdb_convert_object_ex(ldb, working_schema, pfm_remote,
 121                                                       cur, gensec_skey,
 122                                                       ignore_attids,
 123                                                       0,
 124                                                       tmp_ctx, &object);
 125                         if (!W_ERROR_IS_OK(werr)) {
 126                                 DEBUG(4,("debug: Failed to convert schema object %s into ldb msg, will try during next loop\n",
 127                                           cur->object.identifier->dn));
 128
 129                                 failed_obj_count++;
 130                         } else {
 131                                 /*
 132                                  * Convert the schema from ldb_message format
 133                                  * (OIDs as OID strings) into schema, using
 134                                  * the remote prefixMap
 135                                  */
 136                                 werr = dsdb_schema_set_el_from_ldb_msg(ldb,
 137                                                                        working_schema,
 138                                                                        object.msg);
 139                                 if (!W_ERROR_IS_OK(werr)) {
 140                                         DEBUG(4,("debug: failed to convert object %s into a schema element, will try during next loop: %s\n",
 141                                                  ldb_dn_get_linearized(object.msg->dn),
 142                                                  win_errstr(werr)));
 143                                         failed_obj_count++;
 144                                 } else {
 145                                         DLIST_REMOVE(schema_list, schema_list_item);
 146                                         talloc_free(schema_list_item);
 147                                         converted_obj_count++;
 148                                 }
 149                         }
 150                 }
 151                 talloc_free(tmp_ctx);
 152
 153                 DEBUG(4,("Schema load pass %d: %d/%d of %d objects left to be converted.\n",
 154                          pass_no, failed_obj_count, converted_obj_count, object_count));
 155                 pass_no++;
 156
 157                 /* check if we converted any objects in this pass */
 158                 if (converted_obj_count == 0) {
 159                         DEBUG(0,("Can't continue Schema load: didn't manage to convert any objects: all %d remaining of %d objects failed to convert\n", failed_obj_count, object_count));
 160                         return WERR_INTERNAL_ERROR;
 161                 }
 162
 163                 /* rebuild indexes */
 164                 ret = dsdb_setup_sorted_accessors(ldb, working_schema);
 165                 if (LDB_SUCCESS != ret) {
 166                         DEBUG(0,("Failed to create schema-cache indexes!\n"));
 167                         return WERR_INTERNAL_ERROR;
 168                 }
 169         };
 170
 171         *_schema_out = working_schema;
 172
 173         return WERR_OK;
 174 }
 175
 176 static bool dsdb_attid_in_list(const uint32_t attid_list[], uint32_t attid)
 177 {
 178         const uint32_t *cur;
 179         if (!attid_list) {
 180                 return false;
 181         }
 182         for (cur = attid_list; *cur != DRSUAPI_ATTID_INVALID; cur++) {
 183                 if (*cur == attid) {
 184                         return true;
 185                 }
 186         }
 187         return false;
 188 }
 189
 190 WERROR dsdb_convert_object_ex(struct ldb_context *ldb,
 191                               const struct dsdb_schema *schema,
 192                               const struct dsdb_schema_prefixmap *pfm_remote,
 193                               const struct drsuapi_DsReplicaObjectListItemEx *in,
 194                               const DATA_BLOB *gensec_skey,
 195                               const uint32_t *ignore_attids,
 196                               uint32_t dsdb_repl_flags,
 197                               TALLOC_CTX *mem_ctx,
 198                               struct dsdb_extended_replicated_object *out)
 199 {
 200         NTSTATUS nt_status;
 201         WERROR status;
 202         uint32_t i;
 203         struct ldb_message *msg;
 204         struct replPropertyMetaDataBlob *md;
 205         int instanceType;
 206         struct ldb_message_element *instanceType_e = NULL;
 207         struct ldb_val guid_value;
 208         struct ldb_val parent_guid_value;
 209         NTTIME whenChanged = 0;
 210         time_t whenChanged_t;
 211         const char *whenChanged_s;
 212         const char *rdn_name = NULL;
 213         const struct ldb_val *rdn_value = NULL;
 214         const struct dsdb_attribute *rdn_attr = NULL;
 215         uint32_t rdn_attid;
 216         struct drsuapi_DsReplicaAttribute *name_a = NULL;
 217         struct drsuapi_DsReplicaMetaData *name_d = NULL;
 218         struct replPropertyMetaData1 *rdn_m = NULL;
 219         struct dom_sid *sid = NULL;
 220         uint32_t rid = 0;
 221         uint32_t attr_count;
 222         int ret;
 223
 224         if (!in->object.identifier) {
 225                 return WERR_FOOBAR;
 226         }
 227
 228         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 229                 return WERR_FOOBAR;
 230         }
 231
 232         if (in->object.attribute_ctr.num_attributes != 0 && !in->meta_data_ctr) {
 233                 return WERR_FOOBAR;
 234         }
 235
 236         if (in->object.attribute_ctr.num_attributes != in->meta_data_ctr->count) {
 237                 return WERR_FOOBAR;
 238         }
 239
 240         sid = &in->object.identifier->sid;
 241         if (sid->num_auths > 0) {
 242                 rid = sid->sub_auths[sid->num_auths - 1];
 243         }
 244
 245         msg = ldb_msg_new(mem_ctx);
 246         W_ERROR_HAVE_NO_MEMORY(msg);
 247
 248         msg->dn                 = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 249         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 250
 251         rdn_name        = ldb_dn_get_rdn_name(msg->dn);
 252         rdn_attr        = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
 253         if (!rdn_attr) {
 254                 return WERR_FOOBAR;
 255         }
 256         rdn_attid       = rdn_attr->attributeID_id;
 257         rdn_value       = ldb_dn_get_rdn_val(msg->dn);
 258
 259         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 260         msg->elements           = talloc_array(msg, struct ldb_message_element,
 261                                                msg->num_elements + 1); /* +1 because of the RDN attribute */
 262         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 263
 264         md = talloc(mem_ctx, struct replPropertyMetaDataBlob);
 265         W_ERROR_HAVE_NO_MEMORY(md);
 266
 267         md->version             = 1;
 268         md->reserved            = 0;
 269         md->ctr.ctr1.count      = in->meta_data_ctr->count;
 270         md->ctr.ctr1.reserved   = 0;
 271         md->ctr.ctr1.array      = talloc_array(mem_ctx,
 272                                                struct replPropertyMetaData1,
 273                                                md->ctr.ctr1.count + 1); /* +1 because of the RDN attribute */
 274         W_ERROR_HAVE_NO_MEMORY(md->ctr.ctr1.array);
 275
 276         for (i=0, attr_count=0; i < in->meta_data_ctr->count; i++, attr_count++) {
 277                 struct drsuapi_DsReplicaAttribute *a;
 278                 struct drsuapi_DsReplicaMetaData *d;
 279                 struct replPropertyMetaData1 *m;
 280                 struct ldb_message_element *e;
 281                 uint32_t j;
 282
 283                 a = &in->object.attribute_ctr.attributes[i];
 284                 d = &in->meta_data_ctr->meta_data[i];
 285                 m = &md->ctr.ctr1.array[attr_count];
 286                 e = &msg->elements[attr_count];
 287
 288                 if (dsdb_attid_in_list(ignore_attids, a->attid)) {
 289                         attr_count--;
 290                         continue;
 291                 }
 292
 293                 if (a->attid == DRSUAPI_ATTID_instanceType) {
 294                         if (instanceType_e != NULL) {
 295                                 return WERR_FOOBAR;
 296                         }
 297                         instanceType_e = e;
 298                 }
 299
 300                 for (j=0; j<a->value_ctr.num_values; j++) {
 301                         status = drsuapi_decrypt_attribute(a->value_ctr.values[j].blob, gensec_skey, rid, a);
 302                         W_ERROR_NOT_OK_RETURN(status);
 303                 }
 304
 305                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, pfm_remote,
 306                                                        a, msg->elements, e);
 307                 W_ERROR_NOT_OK_RETURN(status);
 308
 309                 m->attid                        = a->attid;
 310                 m->version                      = d->version;
 311                 m->originating_change_time      = d->originating_change_time;
 312                 m->originating_invocation_id    = d->originating_invocation_id;
 313                 m->originating_usn              = d->originating_usn;
 314                 m->local_usn                    = 0;
 315
 316                 if (d->originating_change_time > whenChanged) {
 317                         whenChanged = d->originating_change_time;
 318                 }
 319
 320                 if (a->attid == DRSUAPI_ATTID_name) {
 321                         name_a = a;
 322                         name_d = d;
 323                 }
 324         }
 325
 326         msg->num_elements = attr_count;
 327         md->ctr.ctr1.count = attr_count;
 328         if (name_a) {
 329                 rdn_m = &md->ctr.ctr1.array[md->ctr.ctr1.count];
 330         }
 331
 332         if (rdn_m) {
 333                 struct ldb_message_element *el;
 334                 el = ldb_msg_find_element(msg, rdn_attr->lDAPDisplayName);
 335                 if (!el) {
 336                         ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 337                         if (ret != LDB_SUCCESS) {
 338                                 return WERR_FOOBAR;
 339                         }
 340                 } else {
 341                         if (el->num_values != 1) {
 342                                 DEBUG(0,(__location__ ": Unexpected num_values=%u\n",
 343                                          el->num_values));
 344                                 return WERR_FOOBAR;
 345                         }
 346                         if (!ldb_val_equal_exact(&el->values[0], rdn_value)) {
 347                                 DEBUG(0,(__location__ ": RDN value changed? '%*.*s' '%*.*s'\n",
 348                                          (int)el->values[0].length, (int)el->values[0].length, el->values[0].data,
 349                                          (int)rdn_value->length, (int)rdn_value->length, rdn_value->data));
 350                                 return WERR_FOOBAR;
 351                         }
 352                 }
 353
 354                 rdn_m->attid                            = rdn_attid;
 355                 rdn_m->version                          = name_d->version;
 356                 rdn_m->originating_change_time          = name_d->originating_change_time;
 357                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 358                 rdn_m->originating_usn                  = name_d->originating_usn;
 359                 rdn_m->local_usn                        = 0;
 360                 md->ctr.ctr1.count++;
 361
 362         }
 363
 364         if (instanceType_e == NULL) {
 365                 return WERR_FOOBAR;
 366         }
 367
 368         instanceType = ldb_msg_find_attr_as_int(msg, "instanceType", 0);
 369         if (dsdb_repl_flags & DSDB_REPL_FLAG_PARTIAL_REPLICA) {
 370                 /* the instanceType type for partial_replica
 371                    replication is sent via DRS with TYPE_WRITE set, but
 372                    must be used on the client with TYPE_WRITE removed
 373                 */
 374                 if (instanceType & INSTANCE_TYPE_WRITE) {
 375                         /*
 376                          * Make sure we do not change the order
 377                          * of msg->elements!
 378                          *
 379                          * That's why we use
 380                          * instanceType_e->num_values = 0
 381                          * instead of
 382                          * ldb_msg_remove_attr(msg, "instanceType");
 383                          */
 384                         struct ldb_message_element *e;
 385
 386                         e = ldb_msg_find_element(msg, "instanceType");
 387                         if (e != instanceType_e) {
 388                                 DEBUG(0,("instanceType_e[%p] changed to e[%p]\n",
 389                                          instanceType_e, e));
 390                                 return WERR_FOOBAR;
 391                         }
 392
 393                         instanceType_e->num_values = 0;
 394
 395                         instanceType &= ~INSTANCE_TYPE_WRITE;
 396                         if (ldb_msg_add_fmt(msg, "instanceType", "%d", instanceType) != LDB_SUCCESS) {
 397                                 return WERR_INTERNAL_ERROR;
 398                         }
 399                 }
 400         } else {
 401                 if (!(instanceType & INSTANCE_TYPE_WRITE)) {
 402                         DEBUG(0, ("Refusing to replicate %s from a read-only repilca into a read-write replica!\n",
 403                                   ldb_dn_get_linearized(msg->dn)));
 404                         return WERR_DS_DRA_SOURCE_IS_PARTIAL_REPLICA;
 405                 }
 406         }
 407
 408         whenChanged_t = nt_time_to_unix(whenChanged);
 409         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 410         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 411
 412         nt_status = GUID_to_ndr_blob(&in->object.identifier->guid, msg, &guid_value);
 413         if (!NT_STATUS_IS_OK(nt_status)) {
 414                 return ntstatus_to_werror(nt_status);
 415         }
 416
 417         if (in->parent_object_guid) {
 418                 nt_status = GUID_to_ndr_blob(in->parent_object_guid, msg, &parent_guid_value);
 419                 if (!NT_STATUS_IS_OK(nt_status)) {
 420                         return ntstatus_to_werror(nt_status);
 421                 }
 422         } else {
 423                 parent_guid_value = data_blob_null;
 424         }
 425
 426         out->msg                = msg;
 427         out->guid_value         = guid_value;
 428         out->parent_guid_value  = parent_guid_value;
 429         out->when_changed       = whenChanged_s;
 430         out->meta_data          = md;
 431         return WERR_OK;
 432 }
 433
 434 WERROR dsdb_replicated_objects_convert(struct ldb_context *ldb,
 435                                        const struct dsdb_schema *schema,
 436                                        const char *partition_dn_str,
 437                                        const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 438                                        uint32_t object_count,
 439                                        const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 440                                        uint32_t linked_attributes_count,
 441                                        const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 442                                        const struct repsFromTo1 *source_dsa,
 443                                        const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 444                                        const DATA_BLOB *gensec_skey,
 445                                        uint32_t dsdb_repl_flags,
 446                                        TALLOC_CTX *mem_ctx,
 447                                        struct dsdb_extended_replicated_objects **objects)
 448 {
 449         WERROR status;
 450         struct ldb_dn *partition_dn;
 451         struct dsdb_schema_prefixmap *pfm_remote;
 452         struct dsdb_extended_replicated_objects *out;
 453         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 454         uint32_t i;
 455
 456         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 457         W_ERROR_HAVE_NO_MEMORY(out);
 458         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 459         out->dsdb_repl_flags    = dsdb_repl_flags;
 460
 461         /*
 462          * Ensure schema is kept valid for as long as 'out'
 463          * which may contain pointers to it
 464          */
 465         schema = talloc_reference(out, schema);
 466         W_ERROR_HAVE_NO_MEMORY(schema);
 467
 468         partition_dn = ldb_dn_new(out, ldb, partition_dn_str);
 469         W_ERROR_HAVE_NO_MEMORY_AND_FREE(partition_dn, out);
 470
 471         status = dsdb_schema_pfm_from_drsuapi_pfm(mapping_ctr, true,
 472                                                   out, &pfm_remote, NULL);
 473         if (!W_ERROR_IS_OK(status)) {
 474                 DEBUG(0,(__location__ ": Failed to decode remote prefixMap: %s",
 475                          win_errstr(status)));
 476                 talloc_free(out);
 477                 return status;
 478         }
 479
 480         if (ldb_dn_compare(partition_dn, ldb_get_schema_basedn(ldb)) != 0) {
 481                 /*
 482                  * check for schema changes in case
 483                  * we are not replicating Schema NC
 484                  */
 485                 status = dsdb_schema_info_cmp(schema, mapping_ctr);
 486                 if (!W_ERROR_IS_OK(status)) {
 487                         DEBUG(1,("Remote schema has changed while replicating %s\n",
 488                                  partition_dn_str));
 489                         talloc_free(out);
 490                         return status;
 491                 }
 492         }
 493
 494         out->partition_dn       = partition_dn;
 495
 496         out->source_dsa         = source_dsa;
 497         out->uptodateness_vector= uptodateness_vector;
 498
 499         out->num_objects        = object_count;
 500         out->objects            = talloc_array(out,
 501                                                struct dsdb_extended_replicated_object,
 502                                                out->num_objects);
 503         W_ERROR_HAVE_NO_MEMORY_AND_FREE(out->objects, out);
 504
 505         /* pass the linked attributes down to the repl_meta_data
 506            module */
 507         out->linked_attributes_count = linked_attributes_count;
 508         out->linked_attributes       = linked_attributes;
 509
 510         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 511                 if (i == out->num_objects) {
 512                         talloc_free(out);
 513                         return WERR_FOOBAR;
 514                 }
 515
 516                 status = dsdb_convert_object_ex(ldb, schema, pfm_remote,
 517                                                 cur, gensec_skey,
 518                                                 NULL,
 519                                                 dsdb_repl_flags,
 520                                                 out->objects, &out->objects[i]);
 521                 if (!W_ERROR_IS_OK(status)) {
 522                         talloc_free(out);
 523                         DEBUG(0,("Failed to convert object %s: %s\n",
 524                                  cur->object.identifier->dn,
 525                                  win_errstr(status)));
 526                         return status;
 527                 }
 528         }
 529         if (i != out->num_objects) {
 530                 talloc_free(out);
 531                 return WERR_FOOBAR;
 532         }
 533
 534         /* free pfm_remote, we won't need it anymore */
 535         talloc_free(pfm_remote);
 536
 537         *objects = out;
 538         return WERR_OK;
 539 }
 540
 541 /**
 542  * Commits a list of replicated objects.
 543  *
 544  * @param working_schema dsdb_schema to be used for resolving
 545  *                       Classes/Attributes during Schema replication. If not NULL,
 546  *                       it will be set on ldb and used while committing replicated objects
 547  */
 548 WERROR dsdb_replicated_objects_commit(struct ldb_context *ldb,
 549                                       struct dsdb_schema *working_schema,
 550                                       struct dsdb_extended_replicated_objects *objects,
 551                                       uint64_t *notify_uSN)
 552 {
 553         WERROR werr;
 554         struct ldb_result *ext_res;
 555         struct dsdb_schema *cur_schema = NULL;
 556         struct dsdb_schema *new_schema = NULL;
 557         int ret;
 558         uint64_t seq_num1, seq_num2;
 559         bool used_global_schema = false;
 560
 561         TALLOC_CTX *tmp_ctx = talloc_new(objects);
 562         if (!tmp_ctx) {
 563                 DEBUG(0,("Failed to start talloc\n"));
 564                 return WERR_NOMEM;
 565         }
 566
 567         /* TODO: handle linked attributes */
 568
 569         /* wrap the extended operation in a transaction
 570            See [MS-DRSR] 3.3.2 Transactions
 571          */
 572         ret = ldb_transaction_start(ldb);
 573         if (ret != LDB_SUCCESS) {
 574                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 575                 return WERR_FOOBAR;
 576         }
 577
 578         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num1, NULL);
 579         if (ret != LDB_SUCCESS) {
 580                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 581                 ldb_transaction_cancel(ldb);
 582                 TALLOC_FREE(tmp_ctx);
 583                 return WERR_FOOBAR;
 584         }
 585
 586         /*
 587          * Set working_schema for ldb in case we are replicating from Schema NC.
 588          * Schema won't be reloaded during Replicated Objects commit, as it is
 589          * done in a transaction. So we need some way to search for newly
 590          * added Classes and Attributes
 591          */
 592         if (working_schema) {
 593                 /* store current schema so we can fall back in case of failure */
 594                 cur_schema = dsdb_get_schema(ldb, tmp_ctx);
 595                 used_global_schema = dsdb_uses_global_schema(ldb);
 596
 597                 ret = dsdb_reference_schema(ldb, working_schema, false);
 598                 if (ret != LDB_SUCCESS) {
 599                         DEBUG(0,(__location__ "Failed to reference working schema - %s\n",
 600                                  ldb_strerror(ret)));
 601                         /* TODO: Map LDB Error to NTSTATUS? */
 602                         ldb_transaction_cancel(ldb);
 603                         TALLOC_FREE(tmp_ctx);
 604                         return WERR_INTERNAL_ERROR;
 605                 }
 606         }
 607
 608         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, objects, &ext_res);
 609         if (ret != LDB_SUCCESS) {
 610                 /* restore previous schema */
 611                 if (used_global_schema) {
 612                         dsdb_set_global_schema(ldb);
 613                 } else if (cur_schema) {
 614                         dsdb_reference_schema(ldb, cur_schema, false);
 615                 }
 616
 617                 DEBUG(0,("Failed to apply records: %s: %s\n",
 618                          ldb_errstring(ldb), ldb_strerror(ret)));
 619                 ldb_transaction_cancel(ldb);
 620                 TALLOC_FREE(tmp_ctx);
 621                 return WERR_FOOBAR;
 622         }
 623         talloc_free(ext_res);
 624
 625         /* Save our updated prefixMap */
 626         if (working_schema) {
 627                 werr = dsdb_write_prefixes_from_schema_to_ldb(working_schema,
 628                                                               ldb,
 629                                                               working_schema);
 630                 if (!W_ERROR_IS_OK(werr)) {
 631                         /* restore previous schema */
 632                         if (used_global_schema) {
 633                                 dsdb_set_global_schema(ldb);
 634                         } else if (cur_schema ) {
 635                                 dsdb_reference_schema(ldb, cur_schema, false);
 636                         }
 637                         DEBUG(0,("Failed to save updated prefixMap: %s\n",
 638                                  win_errstr(werr)));
 639                         TALLOC_FREE(tmp_ctx);
 640                         return werr;
 641                 }
 642         }
 643
 644         ret = ldb_transaction_prepare_commit(ldb);
 645         if (ret != LDB_SUCCESS) {
 646                 /* restore previous schema */
 647                 if (used_global_schema) {
 648                         dsdb_set_global_schema(ldb);
 649                 } else if (cur_schema ) {
 650                         dsdb_reference_schema(ldb, cur_schema, false);
 651                 }
 652                 DEBUG(0,(__location__ " Failed to prepare commit of transaction: %s\n",
 653                          ldb_errstring(ldb)));
 654                 TALLOC_FREE(tmp_ctx);
 655                 return WERR_FOOBAR;
 656         }
 657
 658         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num2, NULL);
 659         if (ret != LDB_SUCCESS) {
 660                 /* restore previous schema */
 661                 if (used_global_schema) {
 662                         dsdb_set_global_schema(ldb);
 663                 } else if (cur_schema ) {
 664                         dsdb_reference_schema(ldb, cur_schema, false);
 665                 }
 666                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 667                 ldb_transaction_cancel(ldb);
 668                 TALLOC_FREE(tmp_ctx);
 669                 return WERR_FOOBAR;
 670         }
 671
 672         /* if this replication partner didn't need to be notified
 673            before this transaction then it still doesn't need to be
 674            notified, as the changes came from this server */
 675         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 676                 *notify_uSN = seq_num2;
 677         }
 678
 679         ret = ldb_transaction_commit(ldb);
 680         if (ret != LDB_SUCCESS) {
 681                 /* restore previous schema */
 682                 if (used_global_schema) {
 683                         dsdb_set_global_schema(ldb);
 684                 } else if (cur_schema ) {
 685                         dsdb_reference_schema(ldb, cur_schema, false);
 686                 }
 687                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 688                 TALLOC_FREE(tmp_ctx);
 689                 return WERR_FOOBAR;
 690         }
 691
 692         /*
 693          * Reset the Schema used by ldb. This will lead to
 694          * a schema cache being refreshed from database.
 695          */
 696         if (working_schema) {
 697                 struct ldb_message *msg;
 698                 struct ldb_request *req;
 699
 700                 /* Force a reload */
 701                 working_schema->last_refresh = 0;
 702                 new_schema = dsdb_get_schema(ldb, tmp_ctx);
 703                 /* TODO:
 704                  * If dsdb_get_schema() fails, we just fall back
 705                  * to what we had.  However, the database is probably
 706                  * unable to operate for other users from this
 707                  * point... */
 708                 if (new_schema && used_global_schema) {
 709                         dsdb_make_schema_global(ldb, new_schema);
 710                 } else if (used_global_schema) {
 711                         DEBUG(0,("Failed to re-load schema after commit of transaction\n"));
 712                         dsdb_set_global_schema(ldb);
 713                         TALLOC_FREE(tmp_ctx);
 714                         return WERR_INTERNAL_ERROR;
 715                 } else {
 716                         DEBUG(0,("Failed to re-load schema after commit of transaction\n"));
 717                         dsdb_reference_schema(ldb, cur_schema, false);
 718                         TALLOC_FREE(tmp_ctx);
 719                         return WERR_INTERNAL_ERROR;
 720                 }
 721                 msg = ldb_msg_new(tmp_ctx);
 722                 if (msg == NULL) {
 723                         TALLOC_FREE(tmp_ctx);
 724                         return WERR_NOMEM;
 725                 }
 726                 msg->dn = ldb_dn_new(msg, ldb, "");
 727                 if (msg->dn == NULL) {
 728                         TALLOC_FREE(tmp_ctx);
 729                         return WERR_NOMEM;
 730                 }
 731
 732                 ret = ldb_msg_add_string(msg, "schemaUpdateNow", "1");
 733                 if (ret != LDB_SUCCESS) {
 734                         TALLOC_FREE(tmp_ctx);
 735                         return WERR_INTERNAL_ERROR;
 736                 }
 737
 738                 ret = ldb_build_mod_req(&req, ldb, objects,
 739                                 msg,
 740                                 LDB_SCOPE_BASE,
 741                                 NULL,
 742                                 ldb_op_default_callback,
 743                                 NULL);
 744
 745                 if (ret != LDB_SUCCESS) {
 746                         TALLOC_FREE(tmp_ctx);
 747                         return WERR_DS_DRA_INTERNAL_ERROR;
 748                 }
 749
 750                 ret = ldb_transaction_start(ldb);
 751                 if (ret != LDB_SUCCESS) {
 752                         TALLOC_FREE(tmp_ctx);
 753                         DEBUG(0, ("Autotransaction start failed\n"));
 754                         return WERR_DS_DRA_INTERNAL_ERROR;
 755                 }
 756
 757                 ret = ldb_request(ldb, req);
 758                 if (ret == LDB_SUCCESS) {
 759                         ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 760                 }
 761
 762                 if (ret == LDB_SUCCESS) {
 763                         ret = ldb_transaction_commit(ldb);
 764                 } else {
 765                         DEBUG(0, ("Schema update now failed: %s\n",
 766                                   ldb_errstring(ldb)));
 767                         ldb_transaction_cancel(ldb);
 768                 }
 769
 770                 if (ret != LDB_SUCCESS) {
 771                         DEBUG(0, ("Commit failed: %s\n", ldb_errstring(ldb)));
 772                         TALLOC_FREE(tmp_ctx);
 773                         return WERR_DS_INTERNAL_FAILURE;
 774                 }
 775         }
 776
 777         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 778                  objects->num_objects, objects->linked_attributes_count,
 779                  ldb_dn_get_linearized(objects->partition_dn)));
 780
 781         TALLOC_FREE(tmp_ctx);
 782         return WERR_OK;
 783 }
 784
 785 static WERROR dsdb_origin_object_convert(struct ldb_context *ldb,
 786                                          const struct dsdb_schema *schema,
 787                                          const struct drsuapi_DsReplicaObjectListItem *in,
 788                                          TALLOC_CTX *mem_ctx,
 789                                          struct ldb_message **_msg)
 790 {
 791         WERROR status;
 792         unsigned int i;
 793         struct ldb_message *msg;
 794
 795         if (!in->object.identifier) {
 796                 return WERR_FOOBAR;
 797         }
 798
 799         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 800                 return WERR_FOOBAR;
 801         }
 802
 803         msg = ldb_msg_new(mem_ctx);
 804         W_ERROR_HAVE_NO_MEMORY(msg);
 805
 806         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 807         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 808
 809         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 810         msg->elements           = talloc_array(msg, struct ldb_message_element,
 811                                                msg->num_elements);
 812         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 813
 814         for (i=0; i < msg->num_elements; i++) {
 815                 struct drsuapi_DsReplicaAttribute *a;
 816                 struct ldb_message_element *e;
 817
 818                 a = &in->object.attribute_ctr.attributes[i];
 819                 e = &msg->elements[i];
 820
 821                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, schema->prefixmap,
 822                                                        a, msg->elements, e);
 823                 W_ERROR_NOT_OK_RETURN(status);
 824         }
 825
 826
 827         *_msg = msg;
 828
 829         return WERR_OK;
 830 }
 831
 832 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 833                                   TALLOC_CTX *mem_ctx,
 834                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 835                                   uint32_t *_num,
 836                                   uint32_t dsdb_repl_flags,
 837                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 838 {
 839         WERROR status;
 840         const struct dsdb_schema *schema;
 841         const struct drsuapi_DsReplicaObjectListItem *cur;
 842         struct ldb_message **objects;
 843         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 844         uint32_t i;
 845         uint32_t num_objects = 0;
 846         const char * const attrs[] = {
 847                 "objectGUID",
 848                 "objectSid",
 849                 NULL
 850         };
 851         struct ldb_result *res;
 852         int ret;
 853
 854         for (cur = first_object; cur; cur = cur->next_object) {
 855                 num_objects++;
 856         }
 857
 858         if (num_objects == 0) {
 859                 return WERR_OK;
 860         }
 861
 862         ret = ldb_transaction_start(ldb);
 863         if (ret != LDB_SUCCESS) {
 864                 return WERR_DS_INTERNAL_FAILURE;
 865         }
 866
 867         objects = talloc_array(mem_ctx, struct ldb_message *,
 868                                num_objects);
 869         if (objects == NULL) {
 870                 status = WERR_NOMEM;
 871                 goto cancel;
 872         }
 873
 874         schema = dsdb_get_schema(ldb, objects);
 875         if (!schema) {
 876                 return WERR_DS_SCHEMA_NOT_LOADED;
 877         }
 878
 879         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 880                 status = dsdb_origin_object_convert(ldb, schema, cur,
 881                                                     objects, &objects[i]);
 882                 if (!W_ERROR_IS_OK(status)) {
 883                         goto cancel;
 884                 }
 885         }
 886
 887         ids = talloc_array(mem_ctx,
 888                            struct drsuapi_DsReplicaObjectIdentifier2,
 889                            num_objects);
 890         if (ids == NULL) {
 891                 status = WERR_NOMEM;
 892                 goto cancel;
 893         }
 894
 895         if (dsdb_repl_flags & DSDB_REPL_FLAG_ADD_NCNAME) {
 896                 /* check for possible NC creation */
 897                 for (i=0; i < num_objects; i++) {
 898                         struct ldb_message *msg = objects[i];
 899                         struct ldb_message_element *el;
 900                         struct ldb_dn *nc_dn;
 901
 902                         if (ldb_msg_check_string_attribute(msg, "objectClass", "crossRef") == 0) {
 903                                 continue;
 904                         }
 905                         el = ldb_msg_find_element(msg, "nCName");
 906                         if (el == NULL || el->num_values != 1) {
 907                                 continue;
 908                         }
 909                         nc_dn = ldb_dn_from_ldb_val(objects, ldb, &el->values[0]);
 910                         if (!ldb_dn_validate(nc_dn)) {
 911                                 continue;
 912                         }
 913                         ret = dsdb_create_partial_replica_NC(ldb, nc_dn);
 914                         if (ret != LDB_SUCCESS) {
 915                                 status = WERR_DS_INTERNAL_FAILURE;
 916                                 goto cancel;
 917                         }
 918                 }
 919         }
 920
 921         for (i=0; i < num_objects; i++) {
 922                 struct dom_sid *sid = NULL;
 923                 struct ldb_request *add_req;
 924
 925                 DEBUG(6,(__location__ ": adding %s\n",
 926                          ldb_dn_get_linearized(objects[i]->dn)));
 927
 928                 ret = ldb_build_add_req(&add_req,
 929                                         ldb,
 930                                         objects,
 931                                         objects[i],
 932                                         NULL,
 933                                         NULL,
 934                                         ldb_op_default_callback,
 935                                         NULL);
 936                 if (ret != LDB_SUCCESS) {
 937                         status = WERR_DS_INTERNAL_FAILURE;
 938                         goto cancel;
 939                 }
 940
 941                 ret = ldb_request_add_control(add_req, LDB_CONTROL_RELAX_OID, true, NULL);
 942                 if (ret != LDB_SUCCESS) {
 943                         status = WERR_DS_INTERNAL_FAILURE;
 944                         goto cancel;
 945                 }
 946
 947                 ret = ldb_request(ldb, add_req);
 948                 if (ret == LDB_SUCCESS) {
 949                         ret = ldb_wait(add_req->handle, LDB_WAIT_ALL);
 950                 }
 951                 if (ret != LDB_SUCCESS) {
 952                         DEBUG(0,(__location__ ": Failed add of %s - %s\n",
 953                                  ldb_dn_get_linearized(objects[i]->dn), ldb_errstring(ldb)));
 954                         status = WERR_DS_INTERNAL_FAILURE;
 955                         goto cancel;
 956                 }
 957
 958                 talloc_free(add_req);
 959
 960                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 961                                  LDB_SCOPE_BASE, attrs,
 962                                  "(objectClass=*)");
 963                 if (ret != LDB_SUCCESS) {
 964                         status = WERR_DS_INTERNAL_FAILURE;
 965                         goto cancel;
 966                 }
 967                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 968                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 969                 if (sid) {
 970                         ids[i].sid = *sid;
 971                 } else {
 972                         ZERO_STRUCT(ids[i].sid);
 973                 }
 974         }
 975
 976         ret = ldb_transaction_commit(ldb);
 977         if (ret != LDB_SUCCESS) {
 978                 return WERR_DS_INTERNAL_FAILURE;
 979         }
 980
 981         talloc_free(objects);
 982
 983         *_num = num_objects;
 984         *_ids = ids;
 985         return WERR_OK;
 986
 987 cancel:
 988         talloc_free(objects);
 989         ldb_transaction_cancel(ldb);
 990         return status;
 991 }