-/*
+/*
ldb database library
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "ldb_module.h"
-#include "dlinklist.h"
+#include "util/dlinklist.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "dsdb/samdb/ldb_modules/util.h"
+struct la_private {
+ struct la_context *la_list;
+};
+
+struct la_op_store {
+ struct la_op_store *next;
+ struct la_op_store *prev;
+ enum la_op {LA_OP_ADD, LA_OP_DEL} op;
+ struct GUID guid;
+ char *name;
+ char *value;
+};
+
+struct replace_context {
+ struct la_context *ac;
+ unsigned int num_elements;
+ struct ldb_message_element *el;
+};
+
+struct la_context {
+ struct la_context *next, *prev;
+ const struct dsdb_schema *schema;
+ struct ldb_module *module;
+ struct ldb_request *req;
+ struct ldb_dn *add_dn;
+ struct ldb_dn *del_dn;
+ struct replace_context *rc;
+ struct la_op_store *ops;
+ struct ldb_extended *op_response;
+ struct ldb_control **op_controls;
+};
+
+static struct la_context *linked_attributes_init(struct ldb_module *module,
+ struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ struct la_context *ac;
+
+ ldb = ldb_module_get_ctx(module);
+
+ ac = talloc_zero(req, struct la_context);
+ if (ac == NULL) {
+ ldb_oom(ldb);
+ return NULL;
+ }
+
+ ac->schema = dsdb_get_schema(ldb, ac);
+ ac->module = module;
+ ac->req = req;
+
+ return ac;
+}
+
+/*
+ turn a DN into a GUID
+ */
+static int la_guid_from_dn(struct la_context *ac, struct ldb_dn *dn, struct GUID *guid)
+{
+ NTSTATUS status;
+ int ret;
+
+ status = dsdb_get_extended_dn_guid(dn, guid, "GUID");
+ if (NT_STATUS_IS_OK(status)) {
+ return LDB_SUCCESS;
+ }
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
+ DEBUG(4,(__location__ ": Unable to parse GUID for dn %s\n",
+ ldb_dn_get_linearized(dn)));
+ return ldb_operr(ldb_module_get_ctx(ac->module));
+ }
+
+ ret = dsdb_find_guid_by_dn(ldb_module_get_ctx(ac->module), dn, guid);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(4,(__location__ ": Failed to find GUID for dn %s\n",
+ ldb_dn_get_linearized(dn)));
+ return ret;
+ }
+ return LDB_SUCCESS;
+}
+
+
+/* Common routine to handle reading the attributes and creating a
+ * series of modify requests */
+static int la_store_op(struct la_context *ac,
+ enum la_op op, struct ldb_val *dn,
+ const char *name)
+{
+ struct ldb_context *ldb;
+ struct la_op_store *os;
+ struct ldb_dn *op_dn;
+ int ret;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ op_dn = ldb_dn_from_ldb_val(ac, ldb, dn);
+ if (!op_dn) {
+ ldb_asprintf_errstring(ldb,
+ "could not parse attribute as a DN");
+ return LDB_ERR_INVALID_DN_SYNTAX;
+ }
+
+ os = talloc_zero(ac, struct la_op_store);
+ if (!os) {
+ return ldb_oom(ldb);
+ }
+
+ os->op = op;
+
+ ret = la_guid_from_dn(ac, op_dn, &os->guid);
+ talloc_free(op_dn);
+ if (ret == LDB_ERR_NO_SUCH_OBJECT && ac->req->operation == LDB_DELETE) {
+ /* we are deleting an object, and we've found it has a
+ * forward link to a target that no longer
+ * exists. This is not an error in the delete, and we
+ * should just not do the deferred delete of the
+ * target attribute
+ */
+ talloc_free(os);
+ return LDB_SUCCESS;
+ }
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ os->name = talloc_strdup(os, name);
+ if (!os->name) {
+ return ldb_oom(ldb);
+ }
+
+ /* Do deletes before adds */
+ if (op == LA_OP_ADD) {
+ DLIST_ADD_END(ac->ops, os, struct la_op_store *);
+ } else {
+ /* By adding to the head of the list, we do deletes before
+ * adds when processing a replace */
+ DLIST_ADD(ac->ops, os);
+ }
+
+ return LDB_SUCCESS;
+}
+
+static int la_queue_mod_request(struct la_context *ac);
+static int la_down_req(struct la_context *ac);
+
+
+
+/* add */
+static int linked_attributes_add(struct ldb_module *module, struct ldb_request *req)
+{
+ struct ldb_context *ldb;
+ const struct dsdb_attribute *target_attr;
+ struct la_context *ac;
+ const char *attr_name;
+ struct ldb_control *ctrl;
+ unsigned int i, j;
+ int ret;
+
+ ldb = ldb_module_get_ctx(module);
+
+ if (ldb_dn_is_special(req->op.add.message->dn)) {
+ /* do not manipulate our control entries */
+ return ldb_next_request(module, req);
+ }
+
+ if (!(ctrl = ldb_request_get_control(req, DSDB_CONTROL_APPLY_LINKS))) {
+ /* don't do anything special for linked attributes, repl_meta_data has done it */
+ return ldb_next_request(module, req);
+ }
+ ctrl->critical = false;
+
+ ac = linked_attributes_init(module, req);
+ if (!ac) {
+ return ldb_operr(ldb);
+ }
+
+ if (!ac->schema) {
+ /* without schema, this doesn't make any sense */
+ talloc_free(ac);
+ return ldb_next_request(module, req);
+ }
+
+ /* Need to ensure we only have forward links being specified */
+ for (i=0; i < req->op.add.message->num_elements; i++) {
+ const struct ldb_message_element *el = &req->op.add.message->elements[i];
+ const struct dsdb_attribute *schema_attr
+ = dsdb_attribute_by_lDAPDisplayName(ac->schema, el->name);
+ if (!schema_attr) {
+ ldb_asprintf_errstring(ldb,
+ "%s: attribute %s is not a valid attribute in schema",
+ __FUNCTION__,
+ el->name);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+ /* We have a valid attribute, now find out if it is a forward link */
+ if ((schema_attr->linkID == 0)) {
+ continue;
+ }
+
+ if ((schema_attr->linkID & 1) == 1) {
+ unsigned int functional_level;
+
+ functional_level = dsdb_functional_level(ldb);
+ SMB_ASSERT(functional_level > DS_DOMAIN_FUNCTION_2000);
+ }
+
+ /* Even link IDs are for the originating attribute */
+ target_attr = dsdb_attribute_by_linkID(ac->schema, schema_attr->linkID + 1);
+ if (!target_attr) {
+ /*
+ * windows 2003 has a broken schema where
+ * the definition of msDS-IsDomainFor
+ * is missing (which is supposed to be
+ * the backlink of the msDS-HasDomainNCs
+ * attribute
+ */
+ continue;
+ }
+
+ attr_name = target_attr->lDAPDisplayName;
+
+ for (j = 0; j < el->num_values; j++) {
+ ret = la_store_op(ac, LA_OP_ADD,
+ &el->values[j],
+ attr_name);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+ }
+
+ /* if no linked attributes are present continue */
+ if (ac->ops == NULL) {
+ /* nothing to do for this module, proceed */
+ talloc_free(ac);
+ return ldb_next_request(module, req);
+ }
+
+ /* start with the original request */
+ return la_down_req(ac);
+}
+
+/* For a delete or rename, we need to find out what linked attributes
+ * are currently on this DN, and then deal with them. This is the
+ * callback to the base search */
+
+static int la_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+ struct ldb_context *ldb;
+ const struct dsdb_attribute *schema_attr;
+ const struct dsdb_attribute *target_attr;
+ struct ldb_message_element *search_el;
+ struct replace_context *rc;
+ struct la_context *ac;
+ const char *attr_name;
+ unsigned int i, j;
+ int ret = LDB_SUCCESS;
+
+ ac = talloc_get_type(req->context, struct la_context);
+ ldb = ldb_module_get_ctx(ac->module);
+ rc = ac->rc;
+
+ if (!ares) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+ if (ares->error != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
+ }
+
+ /* Only entries are interesting, and we only want the olddn */
+ switch (ares->type) {
+ case LDB_REPLY_ENTRY:
+
+ if (ldb_dn_compare(ares->message->dn, ac->req->op.mod.message->dn) != 0) {
+ ldb_asprintf_errstring(ldb,
+ "linked_attributes: %s is not the DN we were looking for",
+ ldb_dn_get_linearized(ares->message->dn));
+ /* Guh? We only asked for this DN */
+ talloc_free(ares);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ ac->add_dn = ac->del_dn = talloc_steal(ac, ares->message->dn);
+
+ /* We don't populate 'rc' for ADD - it can't be deleting elements anyway */
+ for (i = 0; rc && i < rc->num_elements; i++) {
+
+ schema_attr = dsdb_attribute_by_lDAPDisplayName(ac->schema, rc->el[i].name);
+ if (!schema_attr) {
+ ldb_asprintf_errstring(ldb,
+ "%s: attribute %s is not a valid attribute in schema",
+ __FUNCTION__,
+ rc->el[i].name);
+ talloc_free(ares);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OBJECT_CLASS_VIOLATION);
+ }
+
+ search_el = ldb_msg_find_element(ares->message,
+ rc->el[i].name);
+
+ /* See if this element already exists */
+ /* otherwise just ignore as
+ * the add has already been scheduled */
+ if ( ! search_el) {
+ continue;
+ }
+
+ target_attr = dsdb_attribute_by_linkID(ac->schema, schema_attr->linkID + 1);
+ if (!target_attr) {
+ /*
+ * windows 2003 has a broken schema where
+ * the definition of msDS-IsDomainFor
+ * is missing (which is supposed to be
+ * the backlink of the msDS-HasDomainNCs
+ * attribute
+ */
+ continue;
+ }
+ attr_name = target_attr->lDAPDisplayName;
+
+ /* Now we know what was there, we can remove it for the re-add */
+ for (j = 0; j < search_el->num_values; j++) {
+ ret = la_store_op(ac, LA_OP_DEL,
+ &search_el->values[j],
+ attr_name);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(ares);
+ return ldb_module_done(ac->req,
+ NULL, NULL, ret);
+ }
+ }
+ }
+
+ break;
+
+ case LDB_REPLY_REFERRAL:
+ /* ignore */
+ break;
+
+ case LDB_REPLY_DONE:
+
+ talloc_free(ares);
+
+ if (ac->req->operation == LDB_ADD) {
+ /* Start the modifies to the backlinks */
+ ret = la_queue_mod_request(ac);
+
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ ret);
+ }
+ } else {
+ /* Start with the original request */
+ ret = la_down_req(ac);
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+ }
+ return LDB_SUCCESS;
+ }
+
+ talloc_free(ares);
+ return ret;
+}
+
+
+/* modify */
+static int linked_attributes_modify(struct ldb_module *module, struct ldb_request *req)
+{
+ /* Look over list of modifications */
+ /* Find if any are for linked attributes */
+ /* Determine the effect of the modification */
+ /* Apply the modify to the linked entry */
+
+ struct ldb_context *ldb;
+ unsigned int i, j;
+ struct la_context *ac;
+ struct ldb_request *search_req;
+ const char **attrs;
+ struct ldb_control *ctrl;
+ int ret;
+
+ ldb = ldb_module_get_ctx(module);
+
+ if (ldb_dn_is_special(req->op.mod.message->dn)) {
+ /* do not manipulate our control entries */
+ return ldb_next_request(module, req);
+ }
+
+ if (!(ctrl = ldb_request_get_control(req, DSDB_CONTROL_APPLY_LINKS))) {
+ /* don't do anything special for linked attributes, repl_meta_data has done it */
+ return ldb_next_request(module, req);
+ }
+ ctrl->critical = false;
+
+ ac = linked_attributes_init(module, req);
+ if (!ac) {
+ return ldb_operr(ldb);
+ }
+
+ if (!ac->schema) {
+ /* without schema, this doesn't make any sense */
+ return ldb_next_request(module, req);
+ }
+
+ ac->rc = talloc_zero(ac, struct replace_context);
+ if (!ac->rc) {
+ return ldb_oom(ldb);
+ }
+
+ for (i=0; i < req->op.mod.message->num_elements; i++) {
+ bool store_el = false;
+ const char *attr_name;
+ const struct dsdb_attribute *target_attr;
+ const struct ldb_message_element *el = &req->op.mod.message->elements[i];
+ const struct dsdb_attribute *schema_attr
+ = dsdb_attribute_by_lDAPDisplayName(ac->schema, el->name);
+ if (!schema_attr) {
+ ldb_asprintf_errstring(ldb,
+ "%s: attribute %s is not a valid attribute in schema",
+ __FUNCTION__,
+ el->name);
+ return LDB_ERR_OBJECT_CLASS_VIOLATION;
+ }
+ /* We have a valid attribute, now find out if it is a forward link
+ (Even link IDs are for the originating attribute) */
+ if (schema_attr->linkID == 0) {
+ continue;
+ }
+
+ if ((schema_attr->linkID & 1) == 1) {
+ unsigned int functional_level;
+
+ functional_level = dsdb_functional_level(ldb);
+ SMB_ASSERT(functional_level > DS_DOMAIN_FUNCTION_2000);
+ }
+ /* Now find the target attribute */
+ target_attr = dsdb_attribute_by_linkID(ac->schema, schema_attr->linkID + 1);
+ if (!target_attr) {
+ /*
+ * windows 2003 has a broken schema where
+ * the definition of msDS-IsDomainFor
+ * is missing (which is supposed to be
+ * the backlink of the msDS-HasDomainNCs
+ * attribute
+ */
+ continue;
+ }
+
+ attr_name = target_attr->lDAPDisplayName;
+
+ switch (el->flags & LDB_FLAG_MOD_MASK) {
+ case LDB_FLAG_MOD_REPLACE:
+ /* treat as just a normal add the delete part is handled by the callback */
+ store_el = true;
+
+ /* break intentionally missing */
+
+ case LDB_FLAG_MOD_ADD:
+
+ /* For each value being added, we need to setup the adds */
+ for (j = 0; j < el->num_values; j++) {
+ ret = la_store_op(ac, LA_OP_ADD,
+ &el->values[j],
+ attr_name);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+ break;
+
+ case LDB_FLAG_MOD_DELETE:
+
+ if (el->num_values) {
+ /* For each value being deleted, we need to setup the delete */
+ for (j = 0; j < el->num_values; j++) {
+ ret = la_store_op(ac, LA_OP_DEL,
+ &el->values[j],
+ attr_name);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ }
+ } else {
+ /* Flag that there was a DELETE
+ * without a value specified, so we
+ * need to look for the old value */
+ store_el = true;
+ }
+
+ break;
+ }
+
+ if (store_el) {
+ struct ldb_message_element *search_el;
+
+ search_el = talloc_realloc(ac->rc, ac->rc->el,
+ struct ldb_message_element,
+ ac->rc->num_elements +1);
+ if (!search_el) {
+ return ldb_oom(ldb);
+ }
+ ac->rc->el = search_el;
+
+ ac->rc->el[ac->rc->num_elements] = *el;
+ ac->rc->num_elements++;
+ }
+ }
+
+ if (ac->ops || ac->rc->el) {
+ /* both replace and delete without values are handled in the callback
+ * after the search on the entry to be modified is performed */
+
+ attrs = talloc_array(ac->rc, const char *, ac->rc->num_elements + 1);
+ if (!attrs) {
+ return ldb_oom(ldb);
+ }
+ for (i = 0; ac->rc && i < ac->rc->num_elements; i++) {
+ attrs[i] = ac->rc->el[i].name;
+ }
+ attrs[i] = NULL;
+
+ /* The callback does all the hard work here */
+ ret = ldb_build_search_req(&search_req, ldb, ac,
+ req->op.mod.message->dn,
+ LDB_SCOPE_BASE,
+ "(objectClass=*)", attrs,
+ NULL,
+ ac, la_mod_search_callback,
+ req);
+ LDB_REQ_SET_LOCATION(search_req);
+
+ /* We need to figure out our own extended DN, to fill in as the backlink target */
+ if (ret == LDB_SUCCESS) {
+ ret = ldb_request_add_control(search_req,
+ LDB_CONTROL_EXTENDED_DN_OID,
+ false, NULL);
+ }
+ if (ret == LDB_SUCCESS) {
+ talloc_steal(search_req, attrs);
+
+ ret = ldb_next_request(module, search_req);
+ }
+
+ } else {
+ /* nothing to do for this module, proceed */
+ talloc_free(ac);
+ ret = ldb_next_request(module, req);
+ }
+
+ return ret;
+}
static int linked_attributes_fix_links(struct ldb_module *module,
struct ldb_dn *old_dn, struct ldb_dn *new_dn,
struct ldb_message_element *el, struct dsdb_schema *schema,
- const struct dsdb_attribute *schema_attr)
+ const struct dsdb_attribute *schema_attr,
+ struct ldb_request *parent)
{
- int i;
+ unsigned int i, j;
TALLOC_CTX *tmp_ctx = talloc_new(module);
struct ldb_context *ldb = ldb_module_get_ctx(module);
const struct dsdb_attribute *target;
const char *attrs[2];
+ int ret;
target = dsdb_attribute_by_linkID(schema, schema_attr->linkID ^ 1);
if (target == NULL) {
for (i=0; i<el->num_values; i++) {
struct dsdb_dn *dsdb_dn;
- int ret, j;
struct ldb_result *res;
struct ldb_message *msg;
struct ldb_message_element *el2;
ret = dsdb_module_search_dn(module, tmp_ctx, &res, dsdb_dn->dn,
attrs,
- DSDB_SEARCH_SHOW_DELETED |
+ DSDB_FLAG_NEXT_MODULE |
+ DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
- DSDB_SEARCH_REVEAL_INTERNALS);
+ DSDB_SEARCH_REVEAL_INTERNALS, parent);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Linked attribute %s->%s between %s and %s - remote not found - %s",
el->name, target->lDAPDisplayName,
}
msg = res->msgs[0];
- if (msg->num_elements != 1 ||
- ldb_attr_cmp(msg->elements[0].name, target->lDAPDisplayName) != 0) {
- ldb_set_errstring(ldb, "Bad msg elements in linked_attributes_fix_links");
+ if (msg->num_elements == 0) {
+ /* Forward link without backlink remaining - nothing to do here */
+ continue;
+ } else if (msg->num_elements != 1) {
+ ldb_asprintf_errstring(ldb, "Bad msg elements - got %u elements, expected one element to be returned in linked_attributes_fix_links for %s",
+ msg->num_elements, ldb_dn_get_linearized(msg->dn));
+ talloc_free(tmp_ctx);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+ if (ldb_attr_cmp(msg->elements[0].name, target->lDAPDisplayName) != 0) {
+ ldb_asprintf_errstring(ldb, "Bad returned attribute in linked_attributes_fix_links: got %s, expected %s for %s", msg->elements[0].name, target->lDAPDisplayName, ldb_dn_get_linearized(msg->dn));
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
return ret;
}
- ret = dsdb_module_modify(module, msg, DSDB_MODIFY_RELAX);
+ /* we may be putting multiple values in an attribute -
+ disable checking for this attribute */
+ el2->flags |= LDB_FLAG_INTERNAL_DISABLE_SINGLE_VALUE_CHECK;
+
+ ret = dsdb_module_modify(module, msg, DSDB_FLAG_NEXT_MODULE, parent);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Linked attribute %s->%s between %s and %s - update failed - %s",
el->name, target->lDAPDisplayName,
{
struct ldb_result *res;
struct ldb_message *msg;
- int ret, i;
+ unsigned int i;
struct ldb_context *ldb = ldb_module_get_ctx(module);
- struct dsdb_schema *schema = dsdb_get_schema(ldb);
+ struct dsdb_schema *schema;
+ int ret;
/*
- load the current msg
- find any linked attributes
- modify the target linked attributes with the new DN
*/
ret = dsdb_module_search_dn(module, req, &res, req->op.rename.olddn,
- NULL, DSDB_SEARCH_SHOW_DELETED);
+ NULL,
+ DSDB_FLAG_NEXT_MODULE |
+ DSDB_SEARCH_SHOW_RECYCLED, req);
if (ret != LDB_SUCCESS) {
return ret;
}
+
+ schema = dsdb_get_schema(ldb, res);
+ if (!schema) {
+ return ldb_oom(ldb);
+ }
+
msg = res->msgs[0];
for (i=0; i<msg->num_elements; i++) {
continue;
}
ret = linked_attributes_fix_links(module, msg->dn, req->op.rename.newdn, el,
- schema, schema_attr);
+ schema, schema_attr, req);
if (ret != LDB_SUCCESS) {
talloc_free(res);
return ret;
}
-_PUBLIC_ const struct ldb_module_ops ldb_linked_attributes_module_ops = {
+/* queue a linked attributes modify request in the la_private
+ structure */
+static int la_queue_mod_request(struct la_context *ac)
+{
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(ac->module), struct la_private);
+
+ if (la_private == NULL) {
+ ldb_debug(ldb_module_get_ctx(ac->module), LDB_DEBUG_ERROR, __location__ ": No la_private transaction setup\n");
+ return ldb_operr(ldb_module_get_ctx(ac->module));
+ }
+
+ talloc_steal(la_private, ac);
+ DLIST_ADD(la_private->la_list, ac);
+
+ return ldb_module_done(ac->req, ac->op_controls,
+ ac->op_response, LDB_SUCCESS);
+}
+
+/* Having done the original operation, then try to fix up all the linked attributes for modify and delete */
+static int la_mod_del_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+ struct la_context *ac;
+ struct ldb_context *ldb;
+ int ret;
+
+ ac = talloc_get_type(req->context, struct la_context);
+ ldb = ldb_module_get_ctx(ac->module);
+
+ if (!ares) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+ if (ares->error != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
+ }
+
+ if (ares->type != LDB_REPLY_DONE) {
+ ldb_set_errstring(ldb,
+ "invalid ldb_reply_type in callback");
+ talloc_free(ares);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ ac->op_controls = talloc_steal(ac, ares->controls);
+ ac->op_response = talloc_steal(ac, ares->response);
+
+ /* If we have modfies to make, this is the time to do them for modify and delete */
+ ret = la_queue_mod_request(ac);
+
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL, ret);
+ }
+ talloc_free(ares);
+
+ /* la_queue_mod_request has already sent the callbacks */
+ return LDB_SUCCESS;
+
+}
+
+/* Having done the original add, then try to fix up all the linked attributes
+
+ This is done after the add so the links can get the extended DNs correctly.
+ */
+static int la_add_callback(struct ldb_request *req, struct ldb_reply *ares)
+{
+ struct la_context *ac;
+ struct ldb_context *ldb;
+ int ret;
+
+ ac = talloc_get_type(req->context, struct la_context);
+ ldb = ldb_module_get_ctx(ac->module);
+
+ if (!ares) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+ if (ares->error != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
+ }
+
+ if (ares->type != LDB_REPLY_DONE) {
+ ldb_set_errstring(ldb,
+ "invalid ldb_reply_type in callback");
+ talloc_free(ares);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ if (ac->ops) {
+ struct ldb_request *search_req;
+ static const char *attrs[] = { NULL };
+
+ /* The callback does all the hard work here - we need
+ * the objectGUID and SID of the added record */
+ ret = ldb_build_search_req(&search_req, ldb, ac,
+ ac->req->op.add.message->dn,
+ LDB_SCOPE_BASE,
+ "(objectClass=*)", attrs,
+ NULL,
+ ac, la_mod_search_callback,
+ ac->req);
+ LDB_REQ_SET_LOCATION(search_req);
+
+ if (ret == LDB_SUCCESS) {
+ ret = ldb_request_add_control(search_req,
+ LDB_CONTROL_EXTENDED_DN_OID,
+ false, NULL);
+ }
+ if (ret != LDB_SUCCESS) {
+ return ldb_module_done(ac->req, NULL, NULL,
+ ret);
+ }
+
+ ac->op_controls = talloc_steal(ac, ares->controls);
+ ac->op_response = talloc_steal(ac, ares->response);
+
+ return ldb_next_request(ac->module, search_req);
+
+ } else {
+ return ldb_module_done(ac->req, ares->controls,
+ ares->response, ares->error);
+ }
+}
+
+/* Reconstruct the original request, but pointing at our local callback to finish things off */
+static int la_down_req(struct la_context *ac)
+{
+ struct ldb_request *down_req;
+ struct ldb_context *ldb;
+ int ret;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ switch (ac->req->operation) {
+ case LDB_ADD:
+ ret = ldb_build_add_req(&down_req, ldb, ac,
+ ac->req->op.add.message,
+ ac->req->controls,
+ ac, la_add_callback,
+ ac->req);
+ LDB_REQ_SET_LOCATION(down_req);
+ break;
+ case LDB_MODIFY:
+ ret = ldb_build_mod_req(&down_req, ldb, ac,
+ ac->req->op.mod.message,
+ ac->req->controls,
+ ac, la_mod_del_callback,
+ ac->req);
+ LDB_REQ_SET_LOCATION(down_req);
+ break;
+ default:
+ ret = LDB_ERR_OPERATIONS_ERROR;
+ }
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ return ldb_next_request(ac->module, down_req);
+}
+
+/*
+ use the GUID part of an extended DN to find the target DN, in case
+ it has moved
+ */
+static int la_find_dn_target(struct ldb_module *module, struct la_context *ac,
+ struct GUID *guid, struct ldb_dn **dn)
+{
+ return dsdb_find_dn_by_guid(ldb_module_get_ctx(ac->module), ac, guid, dn);
+}
+
+/* apply one la_context op change */
+static int la_do_op_request(struct ldb_module *module, struct la_context *ac, struct la_op_store *op)
+{
+ struct ldb_message_element *ret_el;
+ struct ldb_message *new_msg;
+ struct ldb_context *ldb;
+ int ret;
+
+ ldb = ldb_module_get_ctx(ac->module);
+
+ /* Create the modify request */
+ new_msg = ldb_msg_new(ac);
+ if (!new_msg) {
+ return ldb_oom(ldb);
+ }
+
+ ret = la_find_dn_target(module, ac, &op->guid, &new_msg->dn);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ if (op->op == LA_OP_ADD) {
+ ret = ldb_msg_add_empty(new_msg, op->name,
+ LDB_FLAG_MOD_ADD, &ret_el);
+ } else {
+ ret = ldb_msg_add_empty(new_msg, op->name,
+ LDB_FLAG_MOD_DELETE, &ret_el);
+ }
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ ret_el->values = talloc_array(new_msg, struct ldb_val, 1);
+ if (!ret_el->values) {
+ return ldb_oom(ldb);
+ }
+ ret_el->num_values = 1;
+ if (op->op == LA_OP_ADD) {
+ ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->add_dn, 1));
+ } else {
+ ret_el->values[0] = data_blob_string_const(ldb_dn_get_extended_linearized(new_msg, ac->del_dn, 1));
+ }
+
+#if 0
+ ldb_debug(ldb, LDB_DEBUG_WARNING,
+ "link on %s %s: %s %s\n",
+ ldb_dn_get_linearized(new_msg->dn), ret_el->name,
+ ret_el->values[0].data, ac->ops->op == LA_OP_ADD ? "added" : "deleted");
+#endif
+
+ if (DEBUGLVL(4)) {
+ DEBUG(4,("Applying linked attribute change:\n%s\n",
+ ldb_ldif_message_string(ldb, op, LDB_CHANGETYPE_MODIFY, new_msg)));
+ }
+
+ ret = dsdb_module_modify(module, new_msg, DSDB_FLAG_NEXT_MODULE, ac->req);
+ if (ret != LDB_SUCCESS) {
+ ldb_debug(ldb, LDB_DEBUG_WARNING, "Failed to apply linked attribute change '%s'\n%s\n",
+ ldb_errstring(ldb),
+ ldb_ldif_message_string(ldb, op, LDB_CHANGETYPE_MODIFY, new_msg));
+ }
+
+ return ret;
+}
+
+/* apply one set of la_context changes */
+static int la_do_mod_request(struct ldb_module *module, struct la_context *ac)
+{
+ struct la_op_store *op;
+
+ for (op = ac->ops; op; op=op->next) {
+ int ret = la_do_op_request(module, ac, op);
+ if (ret != LDB_SUCCESS) {
+ if (ret != LDB_ERR_NO_SUCH_OBJECT) {
+ return ret;
+ }
+ }
+ }
+
+ return LDB_SUCCESS;
+}
+
+
+/*
+ we hook into the transaction operations to allow us to
+ perform the linked attribute updates at the end of the whole
+ transaction. This allows a forward linked attribute to be created
+ before the target is created, as long as the target is created
+ in the same transaction
+ */
+static int linked_attributes_start_transaction(struct ldb_module *module)
+{
+ /* create our private structure for this transaction */
+ struct la_private *la_private = talloc_get_type(ldb_module_get_private(module),
+ struct la_private);
+ talloc_free(la_private);
+ la_private = talloc(module, struct la_private);
+ if (la_private == NULL) {
+ return ldb_oom(ldb_module_get_ctx(module));
+ }
+ la_private->la_list = NULL;
+ ldb_module_set_private(module, la_private);
+ return ldb_next_start_trans(module);
+}
+
+/*
+ on prepare commit we loop over our queued la_context structures
+ and apply each of them
+ */
+static int linked_attributes_prepare_commit(struct ldb_module *module)
+{
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(module), struct la_private);
+ struct la_context *ac;
+
+ if (!la_private) {
+ /* prepare commit without begin_transaction - let someone else return the error, just don't segfault */
+ return ldb_next_prepare_commit(module);
+ }
+ /* walk the list backwards, to do the first entry first, as we
+ * added the entries with DLIST_ADD() which puts them at the
+ * start of the list */
+
+ /* Start at the end of the list - so we can start
+ * there, but ensure we don't create a loop by NULLing
+ * it out in the first element */
+ ac = DLIST_TAIL(la_private->la_list);
+
+ for (; ac; ac=DLIST_PREV(ac)) {
+ int ret;
+ ac->req = NULL;
+ ret = la_do_mod_request(module, ac);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(0,(__location__ ": Failed mod request ret=%d\n", ret));
+ talloc_free(la_private);
+ ldb_module_set_private(module, NULL);
+ return ret;
+ }
+ }
+
+ talloc_free(la_private);
+ ldb_module_set_private(module, NULL);
+
+ return ldb_next_prepare_commit(module);
+}
+
+static int linked_attributes_del_transaction(struct ldb_module *module)
+{
+ struct la_private *la_private =
+ talloc_get_type(ldb_module_get_private(module), struct la_private);
+ talloc_free(la_private);
+ ldb_module_set_private(module, NULL);
+ return ldb_next_del_trans(module);
+}
+
+
+static const struct ldb_module_ops ldb_linked_attributes_module_ops = {
.name = "linked_attributes",
- .rename = linked_attributes_rename,
+ .add = linked_attributes_add,
+ .modify = linked_attributes_modify,
+ .rename = linked_attributes_rename,
+ .start_transaction = linked_attributes_start_transaction,
+ .prepare_commit = linked_attributes_prepare_commit,
+ .del_transaction = linked_attributes_del_transaction,
};
+
+int ldb_linked_attributes_module_init(const char *version)
+{
+ LDB_MODULE_CHECK_VERSION(version);
+ return ldb_register_module(&ldb_linked_attributes_module_ops);
+}
git.samba.org / samba.git / blobdiff