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samba-mirror/source4/dsdb/samdb/ldb_modules/repl_meta_data.c
Matthias Dieter Wallnöfer e3081b92c1 s4:dsdb - substitute the "show_deleted" with the "show_recycled" control 
We intend to see always all objects with the "show_deleted" control specified.
To see also recycled objects (beginning with 2008_R2 function level) we need to
use the new "show_recycled" control.

As far as I see this is only internal code and therefore we don't run into
problems if we do substitute it.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
2010-10-03 15:23:18 +00:00

4200 lines
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/*
ldb database library
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Andrew Tridgell 2005
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
Copyright (C) Matthieu Patou <mat@samba.org> 2010
This program is free software; you can redistribute it and/or modify
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/>.
*/
/*
* Name: ldb
*
* Component: ldb repl_meta_data module
*
* Description: - add a unique objectGUID onto every new record,
* - handle whenCreated, whenChanged timestamps
* - handle uSNCreated, uSNChanged numbers
* - handle replPropertyMetaData attribute
*
* Author: Simo Sorce
* Author: Stefan Metzmacher
*/
#include "includes.h"
#include "ldb_module.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/common/proto.h"
#include "../libds/common/flags.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "param/param.h"
#include "libcli/security/dom_sid.h"
#include "lib/util/dlinklist.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "lib/util/binsearch.h"
#include "libcli/security/security.h"
#include "lib/util/tsort.h"
struct replmd_private {
TALLOC_CTX *la_ctx;
struct la_entry *la_list;
TALLOC_CTX *bl_ctx;
struct la_backlink *la_backlinks;
struct nc_entry {
struct nc_entry *prev, *next;
struct ldb_dn *dn;
uint64_t mod_usn;
uint64_t mod_usn_urgent;
} *ncs;
};
struct la_entry {
struct la_entry *next, *prev;
struct drsuapi_DsReplicaLinkedAttribute *la;
};
struct replmd_replicated_request {
struct ldb_module *module;
struct ldb_request *req;
const struct dsdb_schema *schema;
/* the controls we pass down */
struct ldb_control **controls;
/* details for the mode where we apply a bunch of inbound replication meessages */
bool apply_mode;
uint32_t index_current;
struct dsdb_extended_replicated_objects *objs;
struct ldb_message *search_msg;
uint64_t seq_num;
bool is_urgent;
};
enum urgent_situation {
REPL_URGENT_ON_CREATE = 1,
REPL_URGENT_ON_UPDATE = 2,
REPL_URGENT_ON_DELETE = 4
};
static const struct {
const char *update_name;
enum urgent_situation repl_situation;
} urgent_objects[] = {
{"nTDSDSA", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_DELETE)},
{"crossRef", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_DELETE)},
{"attributeSchema", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
{"classSchema", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
{"secret", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
{"rIDManager", (REPL_URGENT_ON_CREATE | REPL_URGENT_ON_UPDATE)},
{NULL, 0}
};
/* Attributes looked for when updating or deleting, to check for a urgent replication needed */
static const char *urgent_attrs[] = {
"lockoutTime",
"pwdLastSet",
"userAccountControl",
NULL
};
static bool replmd_check_urgent_objectclass(const struct ldb_message_element *objectclass_el,
enum urgent_situation situation)
{
unsigned int i, j;
for (i=0; urgent_objects[i].update_name; i++) {
if ((situation & urgent_objects[i].repl_situation) == 0) {
continue;
}
for (j=0; j<objectclass_el->num_values; j++) {
const struct ldb_val *v = &objectclass_el->values[j];
if (ldb_attr_cmp((const char *)v->data, urgent_objects[i].update_name) == 0) {
return true;
}
}
}
return false;
}
static bool replmd_check_urgent_attribute(const struct ldb_message_element *el)
{
if (ldb_attr_in_list(urgent_attrs, el->name)) {
return true;
}
return false;
}
static int replmd_replicated_apply_next(struct replmd_replicated_request *ar);
/*
initialise the module
allocate the private structure and build the list
of partition DNs for use by replmd_notify()
*/
static int replmd_init(struct ldb_module *module)
{
struct replmd_private *replmd_private;
struct ldb_context *ldb = ldb_module_get_ctx(module);
replmd_private = talloc_zero(module, struct replmd_private);
if (replmd_private == NULL) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
ldb_module_set_private(module, replmd_private);
return ldb_next_init(module);
}
/*
cleanup our per-transaction contexts
*/
static void replmd_txn_cleanup(struct replmd_private *replmd_private)
{
talloc_free(replmd_private->la_ctx);
replmd_private->la_list = NULL;
replmd_private->la_ctx = NULL;
talloc_free(replmd_private->bl_ctx);
replmd_private->la_backlinks = NULL;
replmd_private->bl_ctx = NULL;
}
struct la_backlink {
struct la_backlink *next, *prev;
const char *attr_name;
struct GUID forward_guid, target_guid;
bool active;
};
/*
process a backlinks we accumulated during a transaction, adding and
deleting the backlinks from the target objects
*/
static int replmd_process_backlink(struct ldb_module *module, struct la_backlink *bl)
{
struct ldb_dn *target_dn, *source_dn;
int ret;
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_message *msg;
TALLOC_CTX *tmp_ctx = talloc_new(bl);
char *dn_string;
/*
- find DN of target
- find DN of source
- construct ldb_message
- either an add or a delete
*/
ret = dsdb_module_dn_by_guid(module, tmp_ctx, &bl->target_guid, &target_dn);
if (ret != LDB_SUCCESS) {
DEBUG(2,(__location__ ": WARNING: Failed to find target DN for linked attribute with GUID %s\n",
GUID_string(bl, &bl->target_guid)));
return LDB_SUCCESS;
}
ret = dsdb_module_dn_by_guid(module, tmp_ctx, &bl->forward_guid, &source_dn);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to find source DN for linked attribute with GUID %s\n",
GUID_string(bl, &bl->forward_guid));
talloc_free(tmp_ctx);
return ret;
}
msg = ldb_msg_new(tmp_ctx);
if (msg == NULL) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
/* construct a ldb_message for adding/deleting the backlink */
msg->dn = target_dn;
dn_string = ldb_dn_get_extended_linearized(tmp_ctx, source_dn, 1);
if (!dn_string) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_steal_string(msg, bl->attr_name, dn_string);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
msg->elements[0].flags = bl->active?LDB_FLAG_MOD_ADD:LDB_FLAG_MOD_DELETE;
ret = dsdb_module_modify(module, msg, DSDB_FLAG_NEXT_MODULE);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Failed to %s backlink from %s to %s - %s",
bl->active?"add":"remove",
ldb_dn_get_linearized(source_dn),
ldb_dn_get_linearized(target_dn),
ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
talloc_free(tmp_ctx);
return ret;
}
/*
add a backlink to the list of backlinks to add/delete in the prepare
commit
*/
static int replmd_add_backlink(struct ldb_module *module, const struct dsdb_schema *schema,
struct GUID *forward_guid, struct GUID *target_guid,
bool active, const struct dsdb_attribute *schema_attr, bool immediate)
{
const struct dsdb_attribute *target_attr;
struct la_backlink *bl;
struct replmd_private *replmd_private =
talloc_get_type_abort(ldb_module_get_private(module), struct replmd_private);
target_attr = dsdb_attribute_by_linkID(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
*/
return LDB_SUCCESS;
}
/* see if its already in the list */
for (bl=replmd_private->la_backlinks; bl; bl=bl->next) {
if (GUID_equal(forward_guid, &bl->forward_guid) &&
GUID_equal(target_guid, &bl->target_guid) &&
(target_attr->lDAPDisplayName == bl->attr_name ||
strcmp(target_attr->lDAPDisplayName, bl->attr_name) == 0)) {
break;
}
}
if (bl) {
/* we found an existing one */
if (bl->active == active) {
return LDB_SUCCESS;
}
DLIST_REMOVE(replmd_private->la_backlinks, bl);
talloc_free(bl);
return LDB_SUCCESS;
}
if (replmd_private->bl_ctx == NULL) {
replmd_private->bl_ctx = talloc_new(replmd_private);
if (replmd_private->bl_ctx == NULL) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
}
/* its a new one */
bl = talloc(replmd_private->bl_ctx, struct la_backlink);
if (bl == NULL) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
/* Ensure the schema does not go away before the bl->attr_name is used */
if (!talloc_reference(bl, schema)) {
talloc_free(bl);
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
bl->attr_name = target_attr->lDAPDisplayName;
bl->forward_guid = *forward_guid;
bl->target_guid = *target_guid;
bl->active = active;
/* the caller may ask for this backlink to be processed
immediately */
if (immediate) {
int ret = replmd_process_backlink(module, bl);
talloc_free(bl);
return ret;
}
DLIST_ADD(replmd_private->la_backlinks, bl);
return LDB_SUCCESS;
}
/*
* Callback for most write operations in this module:
*
* notify the repl task that a object has changed. The notifies are
* gathered up in the replmd_private structure then written to the
* @REPLCHANGED object in each partition during the prepare_commit
*/
static int replmd_op_callback(struct ldb_request *req, struct ldb_reply *ares)
{
int ret;
struct replmd_replicated_request *ac =
talloc_get_type_abort(req->context, struct replmd_replicated_request);
struct replmd_private *replmd_private =
talloc_get_type_abort(ldb_module_get_private(ac->module), struct replmd_private);
struct nc_entry *modified_partition;
struct ldb_control *partition_ctrl;
const struct dsdb_control_current_partition *partition;
struct ldb_control **controls;
partition_ctrl = ldb_reply_get_control(ares, DSDB_CONTROL_CURRENT_PARTITION_OID);
/* Remove the 'partition' control from what we pass up the chain */
controls = controls_except_specified(ares->controls, ares, partition_ctrl);
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb_module_get_ctx(ac->module), "Invalid reply type for notify\n!");
return ldb_module_done(ac->req, NULL,
NULL, LDB_ERR_OPERATIONS_ERROR);
}
if (!partition_ctrl) {
ldb_set_errstring(ldb_module_get_ctx(ac->module),"No partition control on reply");
return ldb_module_done(ac->req, NULL,
NULL, LDB_ERR_OPERATIONS_ERROR);
}
partition = talloc_get_type_abort(partition_ctrl->data,
struct dsdb_control_current_partition);
if (ac->seq_num > 0) {
for (modified_partition = replmd_private->ncs; modified_partition;
modified_partition = modified_partition->next) {
if (ldb_dn_compare(modified_partition->dn, partition->dn) == 0) {
break;
}
}
if (modified_partition == NULL) {
modified_partition = talloc_zero(replmd_private, struct nc_entry);
if (!modified_partition) {
ldb_oom(ldb_module_get_ctx(ac->module));
return ldb_module_done(ac->req, NULL,
NULL, LDB_ERR_OPERATIONS_ERROR);
}
modified_partition->dn = ldb_dn_copy(modified_partition, partition->dn);
if (!modified_partition->dn) {
ldb_oom(ldb_module_get_ctx(ac->module));
return ldb_module_done(ac->req, NULL,
NULL, LDB_ERR_OPERATIONS_ERROR);
}
DLIST_ADD(replmd_private->ncs, modified_partition);
}
if (ac->seq_num > modified_partition->mod_usn) {
modified_partition->mod_usn = ac->seq_num;
if (ac->is_urgent) {
modified_partition->mod_usn_urgent = ac->seq_num;
}
}
}
if (ac->apply_mode) {
talloc_free(ares);
ac->index_current++;
ret = replmd_replicated_apply_next(ac);
if (ret != LDB_SUCCESS) {
return ldb_module_done(ac->req, NULL, NULL, ret);
}
return ret;
} else {
/* free the partition control container here, for the
* common path. Other cases will have it cleaned up
* eventually with the ares */
talloc_free(partition_ctrl);
return ldb_module_done(ac->req,
controls_except_specified(controls, ares, partition_ctrl),
ares->response, LDB_SUCCESS);
}
}
/*
* update a @REPLCHANGED record in each partition if there have been
* any writes of replicated data in the partition
*/
static int replmd_notify_store(struct ldb_module *module)
{
struct replmd_private *replmd_private =
talloc_get_type(ldb_module_get_private(module), struct replmd_private);
while (replmd_private->ncs) {
int ret;
struct nc_entry *modified_partition = replmd_private->ncs;
ret = dsdb_module_save_partition_usn(module, modified_partition->dn,
modified_partition->mod_usn,
modified_partition->mod_usn_urgent);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to save partition uSN for %s\n",
ldb_dn_get_linearized(modified_partition->dn)));
return ret;
}
DLIST_REMOVE(replmd_private->ncs, modified_partition);
talloc_free(modified_partition);
}
return LDB_SUCCESS;
}
/*
created a replmd_replicated_request context
*/
static struct replmd_replicated_request *replmd_ctx_init(struct ldb_module *module,
struct ldb_request *req)
{
struct ldb_context *ldb;
struct replmd_replicated_request *ac;
ldb = ldb_module_get_ctx(module);
ac = talloc_zero(req, struct replmd_replicated_request);
if (ac == NULL) {
ldb_oom(ldb);
return NULL;
}
ac->module = module;
ac->req = req;
ac->schema = dsdb_get_schema(ldb, ac);
if (!ac->schema) {
ldb_debug_set(ldb, LDB_DEBUG_FATAL,
"replmd_modify: no dsdb_schema loaded");
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return NULL;
}
return ac;
}
/*
add a time element to a record
*/
static int add_time_element(struct ldb_message *msg, const char *attr, time_t t)
{
struct ldb_message_element *el;
char *s;
if (ldb_msg_find_element(msg, attr) != NULL) {
return LDB_SUCCESS;
}
s = ldb_timestring(msg, t);
if (s == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
if (ldb_msg_add_string(msg, attr, s) != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
el = ldb_msg_find_element(msg, attr);
/* always set as replace. This works because on add ops, the flag
is ignored */
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
/*
add a uint64_t element to a record
*/
static int add_uint64_element(struct ldb_message *msg, const char *attr, uint64_t v)
{
struct ldb_message_element *el;
if (ldb_msg_find_element(msg, attr) != NULL) {
return LDB_SUCCESS;
}
if (ldb_msg_add_fmt(msg, attr, "%llu", (unsigned long long)v) != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
el = ldb_msg_find_element(msg, attr);
/* always set as replace. This works because on add ops, the flag
is ignored */
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
static int replmd_replPropertyMetaData1_attid_sort(const struct replPropertyMetaData1 *m1,
const struct replPropertyMetaData1 *m2,
const uint32_t *rdn_attid)
{
if (m1->attid == m2->attid) {
return 0;
}
/*
* the rdn attribute should be at the end!
* so we need to return a value greater than zero
* which means m1 is greater than m2
*/
if (m1->attid == *rdn_attid) {
return 1;
}
/*
* the rdn attribute should be at the end!
* so we need to return a value less than zero
* which means m2 is greater than m1
*/
if (m2->attid == *rdn_attid) {
return -1;
}
return m1->attid > m2->attid ? 1 : -1;
}
static int replmd_replPropertyMetaDataCtr1_sort(struct replPropertyMetaDataCtr1 *ctr1,
const struct dsdb_schema *schema,
struct ldb_dn *dn)
{
const char *rdn_name;
const struct dsdb_attribute *rdn_sa;
rdn_name = ldb_dn_get_rdn_name(dn);
if (!rdn_name) {
DEBUG(0,(__location__ ": No rDN for %s?\n", ldb_dn_get_linearized(dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
if (rdn_sa == NULL) {
DEBUG(0,(__location__ ": No sa found for rDN %s for %s\n", rdn_name, ldb_dn_get_linearized(dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
DEBUG(6,("Sorting rpmd with attid exception %u rDN=%s DN=%s\n",
rdn_sa->attributeID_id, rdn_name, ldb_dn_get_linearized(dn)));
LDB_TYPESAFE_QSORT(ctr1->array, ctr1->count, &rdn_sa->attributeID_id, replmd_replPropertyMetaData1_attid_sort);
return LDB_SUCCESS;
}
static int replmd_ldb_message_element_attid_sort(const struct ldb_message_element *e1,
const struct ldb_message_element *e2,
const struct dsdb_schema *schema)
{
const struct dsdb_attribute *a1;
const struct dsdb_attribute *a2;
/*
* TODO: make this faster by caching the dsdb_attribute pointer
* on the ldb_messag_element
*/
a1 = dsdb_attribute_by_lDAPDisplayName(schema, e1->name);
a2 = dsdb_attribute_by_lDAPDisplayName(schema, e2->name);
/*
* TODO: remove this check, we should rely on e1 and e2 having valid attribute names
* in the schema
*/
if (!a1 || !a2) {
return strcasecmp(e1->name, e2->name);
}
if (a1->attributeID_id == a2->attributeID_id) {
return 0;
}
return a1->attributeID_id > a2->attributeID_id ? 1 : -1;
}
static void replmd_ldb_message_sort(struct ldb_message *msg,
const struct dsdb_schema *schema)
{
LDB_TYPESAFE_QSORT(msg->elements, msg->num_elements, schema, replmd_ldb_message_element_attid_sort);
}
static int replmd_build_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
const struct GUID *invocation_id, uint64_t seq_num,
uint64_t local_usn, NTTIME nttime, uint32_t version, bool deleted);
/*
fix up linked attributes in replmd_add.
This involves setting up the right meta-data in extended DN
components, and creating backlinks to the object
*/
static int replmd_add_fix_la(struct ldb_module *module, struct ldb_message_element *el,
uint64_t seq_num, const struct GUID *invocationId, time_t t,
struct GUID *guid, const struct dsdb_attribute *sa)
{
unsigned int i;
TALLOC_CTX *tmp_ctx = talloc_new(el->values);
struct ldb_context *ldb = ldb_module_get_ctx(module);
/* We will take a reference to the schema in replmd_add_backlink */
const struct dsdb_schema *schema = dsdb_get_schema(ldb, NULL);
NTTIME now;
unix_to_nt_time(&now, t);
for (i=0; i<el->num_values; i++) {
struct ldb_val *v = &el->values[i];
struct dsdb_dn *dsdb_dn = dsdb_dn_parse(tmp_ctx, ldb, v, sa->syntax->ldap_oid);
struct GUID target_guid;
NTSTATUS status;
int ret;
/* note that the DN already has the extended
components from the extended_dn_store module */
status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &target_guid, "GUID");
if (!NT_STATUS_IS_OK(status) || GUID_all_zero(&target_guid)) {
ret = dsdb_module_guid_by_dn(module, dsdb_dn->dn, &target_guid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = dsdb_set_extended_dn_guid(dsdb_dn->dn, &target_guid, "GUID");
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
ret = replmd_build_la_val(el->values, v, dsdb_dn, invocationId,
seq_num, seq_num, now, 0, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = replmd_add_backlink(module, schema, guid, &target_guid, true, sa, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
/*
intercept add requests
*/
static int replmd_add(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_control *control;
struct replmd_replicated_request *ac;
enum ndr_err_code ndr_err;
struct ldb_request *down_req;
struct ldb_message *msg;
const DATA_BLOB *guid_blob;
struct GUID guid;
struct replPropertyMetaDataBlob nmd;
struct ldb_val nmd_value;
const struct GUID *our_invocation_id;
time_t t = time(NULL);
NTTIME now;
char *time_str;
int ret;
unsigned int i;
unsigned int functional_level;
uint32_t ni=0;
bool allow_add_guid = false;
bool remove_current_guid = false;
bool is_urgent = false;
struct ldb_message_element *objectclass_el;
/* check if there's a show relax control (used by provision to say 'I know what I'm doing') */
control = ldb_request_get_control(req, LDB_CONTROL_RELAX_OID);
if (control) {
allow_add_guid = true;
}
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.add.message->dn)) {
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
functional_level = dsdb_functional_level(ldb);
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_add\n");
ac = replmd_ctx_init(module, req);
if (!ac) {
return LDB_ERR_OPERATIONS_ERROR;
}
guid_blob = ldb_msg_find_ldb_val(req->op.add.message, "objectGUID");
if ( guid_blob != NULL ) {
if( !allow_add_guid ) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
"replmd_add: it's not allowed to add an object with objectGUID\n");
talloc_free(ac);
return LDB_ERR_UNWILLING_TO_PERFORM;
} else {
NTSTATUS status = GUID_from_data_blob(guid_blob,&guid);
if ( !NT_STATUS_IS_OK(status)) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
"replmd_add: Unable to parse as a GUID the attribute objectGUID\n");
talloc_free(ac);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* we remove this attribute as it can be a string and will not be treated
correctly and then we will readd it latter on in the good format*/
remove_current_guid = true;
}
} else {
/* a new GUID */
guid = GUID_random();
}
/* Get a sequence number from the backend */
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ac->seq_num);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* get our invocationId */
our_invocation_id = samdb_ntds_invocation_id(ldb);
if (!our_invocation_id) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
"replmd_add: unable to find invocationId\n");
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
/* we have to copy the message as the caller might have it as a const */
msg = ldb_msg_copy_shallow(ac, req->op.add.message);
if (msg == NULL) {
ldb_oom(ldb);
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
/* generated times */
unix_to_nt_time(&now, t);
time_str = ldb_timestring(msg, t);
if (!time_str) {
ldb_oom(ldb);
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
if (remove_current_guid) {
ldb_msg_remove_attr(msg,"objectGUID");
}
/*
* remove autogenerated attributes
*/
ldb_msg_remove_attr(msg, "whenCreated");
ldb_msg_remove_attr(msg, "whenChanged");
ldb_msg_remove_attr(msg, "uSNCreated");
ldb_msg_remove_attr(msg, "uSNChanged");
ldb_msg_remove_attr(msg, "replPropertyMetaData");
/*
* readd replicated attributes
*/
ret = ldb_msg_add_string(msg, "whenCreated", time_str);
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
/* build the replication meta_data */
ZERO_STRUCT(nmd);
nmd.version = 1;
nmd.ctr.ctr1.count = msg->num_elements;
nmd.ctr.ctr1.array = talloc_array(msg,
struct replPropertyMetaData1,
nmd.ctr.ctr1.count);
if (!nmd.ctr.ctr1.array) {
ldb_oom(ldb);
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
for (i=0; i < msg->num_elements; i++) {
struct ldb_message_element *e = &msg->elements[i];
struct replPropertyMetaData1 *m = &nmd.ctr.ctr1.array[ni];
const struct dsdb_attribute *sa;
if (e->name[0] == '@') continue;
sa = dsdb_attribute_by_lDAPDisplayName(ac->schema, e->name);
if (!sa) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR,
"replmd_add: attribute '%s' not defined in schema\n",
e->name);
talloc_free(ac);
return LDB_ERR_NO_SUCH_ATTRIBUTE;
}
if ((sa->systemFlags & DS_FLAG_ATTR_NOT_REPLICATED) || (sa->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED)) {
/* if the attribute is not replicated (0x00000001)
* or constructed (0x00000004) it has no metadata
*/
continue;
}
if (sa->linkID != 0 && functional_level > DS_DOMAIN_FUNCTION_2000) {
ret = replmd_add_fix_la(module, e, ac->seq_num, our_invocation_id, t, &guid, sa);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* linked attributes are not stored in
replPropertyMetaData in FL above w2k */
continue;
}
m->attid = sa->attributeID_id;
m->version = 1;
m->originating_change_time = now;
m->originating_invocation_id = *our_invocation_id;
m->originating_usn = ac->seq_num;
m->local_usn = ac->seq_num;
ni++;
}
/* fix meta data count */
nmd.ctr.ctr1.count = ni;
/*
* sort meta data array, and move the rdn attribute entry to the end
*/
ret = replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, ac->schema, msg->dn);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* generated NDR encoded values */
ndr_err = ndr_push_struct_blob(&nmd_value, msg,
&nmd,
(ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
ldb_oom(ldb);
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
/*
* add the autogenerated values
*/
ret = dsdb_msg_add_guid(msg, &guid, "objectGUID");
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
ret = ldb_msg_add_string(msg, "whenChanged", time_str);
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", ac->seq_num);
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ac->seq_num);
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
if (ret != LDB_SUCCESS) {
ldb_oom(ldb);
talloc_free(ac);
return ret;
}
/*
* sort the attributes by attid before storing the object
*/
replmd_ldb_message_sort(msg, ac->schema);
objectclass_el = ldb_msg_find_element(msg, "objectClass");
is_urgent = replmd_check_urgent_objectclass(objectclass_el,
REPL_URGENT_ON_CREATE);
ac->is_urgent = is_urgent;
ret = ldb_build_add_req(&down_req, ldb, ac,
msg,
req->controls,
ac, replmd_op_callback,
req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
if (functional_level == DS_DOMAIN_FUNCTION_2000) {
ret = ldb_request_add_control(down_req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
}
/* mark the control done */
if (control) {
control->critical = 0;
}
/* go on with the call chain */
return ldb_next_request(module, down_req);
}
/*
* update the replPropertyMetaData for one element
*/
static int replmd_update_rpmd_element(struct ldb_context *ldb,
struct ldb_message *msg,
struct ldb_message_element *el,
struct ldb_message_element *old_el,
struct replPropertyMetaDataBlob *omd,
const struct dsdb_schema *schema,
uint64_t *seq_num,
const struct GUID *our_invocation_id,
NTTIME now)
{
uint32_t i;
const struct dsdb_attribute *a;
struct replPropertyMetaData1 *md1;
a = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
if (a == NULL) {
DEBUG(0,(__location__ ": Unable to find attribute %s in schema\n",
el->name));
return LDB_ERR_OPERATIONS_ERROR;
}
if ((a->systemFlags & DS_FLAG_ATTR_NOT_REPLICATED) || (a->systemFlags & DS_FLAG_ATTR_IS_CONSTRUCTED)) {
return LDB_SUCCESS;
}
/* if the attribute's value haven't changed then return LDB_SUCCESS */
if (old_el != NULL && ldb_msg_element_compare(el, old_el) == 0) {
return LDB_SUCCESS;
}
for (i=0; i<omd->ctr.ctr1.count; i++) {
if (a->attributeID_id == omd->ctr.ctr1.array[i].attid) break;
}
if (a->linkID != 0 && dsdb_functional_level(ldb) > DS_DOMAIN_FUNCTION_2000) {
/* linked attributes are not stored in
replPropertyMetaData in FL above w2k, but we do
raise the seqnum for the object */
if (*seq_num == 0 &&
ldb_sequence_number(ldb, LDB_SEQ_NEXT, seq_num) != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
if (i == omd->ctr.ctr1.count) {
/* we need to add a new one */
omd->ctr.ctr1.array = talloc_realloc(msg, omd->ctr.ctr1.array,
struct replPropertyMetaData1, omd->ctr.ctr1.count+1);
if (omd->ctr.ctr1.array == NULL) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
omd->ctr.ctr1.count++;
ZERO_STRUCT(omd->ctr.ctr1.array[i]);
}
/* Get a new sequence number from the backend. We only do this
* if we have a change that requires a new
* replPropertyMetaData element
*/
if (*seq_num == 0) {
int ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, seq_num);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
}
md1 = &omd->ctr.ctr1.array[i];
md1->version++;
md1->attid = a->attributeID_id;
md1->originating_change_time = now;
md1->originating_invocation_id = *our_invocation_id;
md1->originating_usn = *seq_num;
md1->local_usn = *seq_num;
return LDB_SUCCESS;
}
static uint64_t find_max_local_usn(struct replPropertyMetaDataBlob omd)
{
uint32_t count = omd.ctr.ctr1.count;
uint64_t max = 0;
uint32_t i;
for (i=0; i < count; i++) {
struct replPropertyMetaData1 m = omd.ctr.ctr1.array[i];
if (max < m.local_usn) {
max = m.local_usn;
}
}
return max;
}
/*
* update the replPropertyMetaData object each time we modify an
* object. This is needed for DRS replication, as the merge on the
* client is based on this object
*/
static int replmd_update_rpmd(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_request *req,
struct ldb_message *msg, uint64_t *seq_num,
time_t t,
bool *is_urgent)
{
const struct ldb_val *omd_value;
enum ndr_err_code ndr_err;
struct replPropertyMetaDataBlob omd;
unsigned int i;
NTTIME now;
const struct GUID *our_invocation_id;
int ret;
const char *attrs[] = { "replPropertyMetaData", "*", NULL };
const char *attrs2[] = { "uSNChanged", "objectClass", NULL };
struct ldb_result *res;
struct ldb_context *ldb;
struct ldb_message_element *objectclass_el;
enum urgent_situation situation;
bool rodc, rmd_is_provided;
ldb = ldb_module_get_ctx(module);
our_invocation_id = samdb_ntds_invocation_id(ldb);
if (!our_invocation_id) {
/* this happens during an initial vampire while
updating the schema */
DEBUG(5,("No invocationID - skipping replPropertyMetaData update\n"));
return LDB_SUCCESS;
}
unix_to_nt_time(&now, t);
if (ldb_request_get_control(req, DSDB_CONTROL_CHANGEREPLMETADATA_OID)) {
rmd_is_provided = true;
} else {
rmd_is_provided = false;
}
/* if isDeleted is present and is TRUE, then we consider we are deleting,
* otherwise we consider we are updating */
if (ldb_msg_check_string_attribute(msg, "isDeleted", "TRUE")) {
situation = REPL_URGENT_ON_DELETE;
} else {
situation = REPL_URGENT_ON_UPDATE;
}
if (rmd_is_provided) {
/* In this case the change_replmetadata control was supplied */
/* We check that it's the only attribute that is provided
* (it's a rare case so it's better to keep the code simplier)
* We also check that the highest local_usn is bigger than
* uSNChanged. */
uint64_t db_seq;
if( msg->num_elements != 1 ||
strncmp(msg->elements[0].name,
"replPropertyMetaData", 20) ) {
DEBUG(0,(__location__ ": changereplmetada control called without "\
"a specified replPropertyMetaData attribute or with others\n"));
return LDB_ERR_OPERATIONS_ERROR;
}
if (situation == REPL_URGENT_ON_DELETE) {
DEBUG(0,(__location__ ": changereplmetada control can't be called when deleting an object\n"));
return LDB_ERR_OPERATIONS_ERROR;
}
omd_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
if (!omd_value) {
DEBUG(0,(__location__ ": replPropertyMetaData was not specified for Object %s\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
ndr_err = ndr_pull_struct_blob(omd_value, msg, &omd,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,(__location__ ": Failed to parse replPropertyMetaData for %s\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
*seq_num = find_max_local_usn(omd);
ret = dsdb_module_search_dn(module, msg, &res, msg->dn, attrs2,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_SHOW_EXTENDED_DN |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
DSDB_SEARCH_REVEAL_INTERNALS);
if (ret != LDB_SUCCESS || res->count != 1) {
DEBUG(0,(__location__ ": Object %s failed to find uSNChanged\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
objectclass_el = ldb_msg_find_element(res->msgs[0], "objectClass");
if (is_urgent && replmd_check_urgent_objectclass(objectclass_el,
situation)) {
*is_urgent = true;
}
db_seq = ldb_msg_find_attr_as_uint64(res->msgs[0], "uSNChanged", 0);
if (*seq_num <= db_seq) {
DEBUG(0,(__location__ ": changereplmetada control provided but max(local_usn)"\
" is less or equal to uSNChanged (max = %lld uSNChanged = %lld)\n",
(long long)*seq_num, (long long)db_seq));
return LDB_ERR_OPERATIONS_ERROR;
}
} else {
/* search for the existing replPropertyMetaDataBlob. We need
* to use REVEAL and ask for DNs in storage format to support
* the check for values being the same in
* replmd_update_rpmd_element()
*/
ret = dsdb_module_search_dn(module, msg, &res, msg->dn, attrs,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_SHOW_EXTENDED_DN |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
DSDB_SEARCH_REVEAL_INTERNALS);
if (ret != LDB_SUCCESS || res->count != 1) {
DEBUG(0,(__location__ ": Object %s failed to find replPropertyMetaData\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
objectclass_el = ldb_msg_find_element(res->msgs[0], "objectClass");
if (is_urgent && replmd_check_urgent_objectclass(objectclass_el,
situation)) {
*is_urgent = true;
}
omd_value = ldb_msg_find_ldb_val(res->msgs[0], "replPropertyMetaData");
if (!omd_value) {
DEBUG(0,(__location__ ": Object %s does not have a replPropertyMetaData attribute\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
ndr_err = ndr_pull_struct_blob(omd_value, msg, &omd,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,(__location__ ": Failed to parse replPropertyMetaData for %s\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
if (omd.version != 1) {
DEBUG(0,(__location__ ": bad version %u in replPropertyMetaData for %s\n",
omd.version, ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
for (i=0; i<msg->num_elements; i++) {
struct ldb_message_element *old_el;
old_el = ldb_msg_find_element(res->msgs[0], msg->elements[i].name);
ret = replmd_update_rpmd_element(ldb, msg, &msg->elements[i], old_el, &omd, schema, seq_num,
our_invocation_id, now);
if (ret != LDB_SUCCESS) {
return ret;
}
if (is_urgent && !*is_urgent && (situation == REPL_URGENT_ON_UPDATE)) {
*is_urgent = replmd_check_urgent_attribute(&msg->elements[i]);
}
}
}
/*
* replmd_update_rpmd_element has done an update if the
* seq_num is set
*/
if (*seq_num != 0) {
struct ldb_val *md_value;
struct ldb_message_element *el;
/*if we are RODC and this is a DRSR update then its ok*/
if (!ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
ret = samdb_rodc(ldb, &rodc);
if (ret != LDB_SUCCESS) {
DEBUG(4, (__location__ ": unable to tell if we are an RODC\n"));
} else if (rodc) {
ldb_asprintf_errstring(ldb, "RODC modify is forbidden\n");
return LDB_ERR_REFERRAL;
}
}
md_value = talloc(msg, struct ldb_val);
if (md_value == NULL) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_replPropertyMetaDataCtr1_sort(&omd.ctr.ctr1, schema, msg->dn);
if (ret != LDB_SUCCESS) {
return ret;
}
ndr_err = ndr_push_struct_blob(md_value, msg, &omd,
(ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(0,(__location__ ": Failed to marshall replPropertyMetaData for %s\n",
ldb_dn_get_linearized(msg->dn)));
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_empty(msg, "replPropertyMetaData", LDB_FLAG_MOD_REPLACE, &el);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add updated replPropertyMetaData %s\n",
ldb_dn_get_linearized(msg->dn)));
return ret;
}
el->num_values = 1;
el->values = md_value;
}
return LDB_SUCCESS;
}
struct parsed_dn {
struct dsdb_dn *dsdb_dn;
struct GUID *guid;
struct ldb_val *v;
};
static int parsed_dn_compare(struct parsed_dn *pdn1, struct parsed_dn *pdn2)
{
return GUID_compare(pdn1->guid, pdn2->guid);
}
static struct parsed_dn *parsed_dn_find(struct parsed_dn *pdn, int count, struct GUID *guid, struct ldb_dn *dn)
{
struct parsed_dn *ret;
if (dn && GUID_all_zero(guid)) {
/* when updating a link using DRS, we sometimes get a
NULL GUID. We then need to try and match by DN */
int i;
for (i=0; i<count; i++) {
if (ldb_dn_compare(pdn[i].dsdb_dn->dn, dn) == 0) {
dsdb_get_extended_dn_guid(pdn[i].dsdb_dn->dn, guid, "GUID");
return &pdn[i];
}
}
return NULL;
}
BINARY_ARRAY_SEARCH(pdn, count, guid, guid, GUID_compare, ret);
return ret;
}
/*
get a series of message element values as an array of DNs and GUIDs
the result is sorted by GUID
*/
static int get_parsed_dns(struct ldb_module *module, TALLOC_CTX *mem_ctx,
struct ldb_message_element *el, struct parsed_dn **pdn,
const char *ldap_oid)
{
unsigned int i;
struct ldb_context *ldb = ldb_module_get_ctx(module);
if (el == NULL) {
*pdn = NULL;
return LDB_SUCCESS;
}
(*pdn) = talloc_array(mem_ctx, struct parsed_dn, el->num_values);
if (!*pdn) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
for (i=0; i<el->num_values; i++) {
struct ldb_val *v = &el->values[i];
NTSTATUS status;
struct ldb_dn *dn;
struct parsed_dn *p;
p = &(*pdn)[i];
p->dsdb_dn = dsdb_dn_parse(*pdn, ldb, v, ldap_oid);
if (p->dsdb_dn == NULL) {
return LDB_ERR_INVALID_DN_SYNTAX;
}
dn = p->dsdb_dn->dn;
p->guid = talloc(*pdn, struct GUID);
if (p->guid == NULL) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
status = dsdb_get_extended_dn_guid(dn, p->guid, "GUID");
if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
/* we got a DN without a GUID - go find the GUID */
int ret = dsdb_module_guid_by_dn(module, dn, p->guid);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "Unable to find GUID for DN %s\n",
ldb_dn_get_linearized(dn));
return ret;
}
ret = dsdb_set_extended_dn_guid(dn, p->guid, "GUID");
if (ret != LDB_SUCCESS) {
return ret;
}
} else if (!NT_STATUS_IS_OK(status)) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* keep a pointer to the original ldb_val */
p->v = v;
}
TYPESAFE_QSORT(*pdn, el->num_values, parsed_dn_compare);
return LDB_SUCCESS;
}
/*
build a new extended DN, including all meta data fields
RMD_FLAGS = DSDB_RMD_FLAG_* bits
RMD_ADDTIME = originating_add_time
RMD_INVOCID = originating_invocation_id
RMD_CHANGETIME = originating_change_time
RMD_ORIGINATING_USN = originating_usn
RMD_LOCAL_USN = local_usn
RMD_VERSION = version
*/
static int replmd_build_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
const struct GUID *invocation_id, uint64_t seq_num,
uint64_t local_usn, NTTIME nttime, uint32_t version, bool deleted)
{
struct ldb_dn *dn = dsdb_dn->dn;
const char *tstring, *usn_string, *flags_string;
struct ldb_val tval;
struct ldb_val iid;
struct ldb_val usnv, local_usnv;
struct ldb_val vers, flagsv;
NTSTATUS status;
int ret;
const char *dnstring;
char *vstring;
uint32_t rmd_flags = deleted?DSDB_RMD_FLAG_DELETED:0;
tstring = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)nttime);
if (!tstring) {
return LDB_ERR_OPERATIONS_ERROR;
}
tval = data_blob_string_const(tstring);
usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)seq_num);
if (!usn_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
usnv = data_blob_string_const(usn_string);
usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)local_usn);
if (!usn_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
local_usnv = data_blob_string_const(usn_string);
vstring = talloc_asprintf(mem_ctx, "%lu", (unsigned long)version);
if (!vstring) {
return LDB_ERR_OPERATIONS_ERROR;
}
vers = data_blob_string_const(vstring);
status = GUID_to_ndr_blob(invocation_id, dn, &iid);
if (!NT_STATUS_IS_OK(status)) {
return LDB_ERR_OPERATIONS_ERROR;
}
flags_string = talloc_asprintf(mem_ctx, "%u", rmd_flags);
if (!flags_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
flagsv = data_blob_string_const(flags_string);
ret = ldb_dn_set_extended_component(dn, "RMD_FLAGS", &flagsv);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_ADDTIME", &tval);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_INVOCID", &iid);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_CHANGETIME", &tval);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_LOCAL_USN", &local_usnv);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_ORIGINATING_USN", &usnv);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_VERSION", &vers);
if (ret != LDB_SUCCESS) return ret;
dnstring = dsdb_dn_get_extended_linearized(mem_ctx, dsdb_dn, 1);
if (dnstring == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
*v = data_blob_string_const(dnstring);
return LDB_SUCCESS;
}
static int replmd_update_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
struct dsdb_dn *old_dsdb_dn, const struct GUID *invocation_id,
uint64_t seq_num, uint64_t local_usn, NTTIME nttime,
uint32_t version, bool deleted);
/*
check if any links need upgrading from w2k format
The parent_ctx is the ldb_message_element which contains the values array that dns[i].v points at, and which should be used for allocating any new value.
*/
static int replmd_check_upgrade_links(struct parsed_dn *dns, uint32_t count, struct ldb_message_element *parent_ctx, const struct GUID *invocation_id)
{
uint32_t i;
for (i=0; i<count; i++) {
NTSTATUS status;
uint32_t version;
int ret;
status = dsdb_get_extended_dn_uint32(dns[i].dsdb_dn->dn, &version, "RMD_VERSION");
if (!NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
continue;
}
/* it's an old one that needs upgrading */
ret = replmd_update_la_val(parent_ctx->values, dns[i].v, dns[i].dsdb_dn, dns[i].dsdb_dn, invocation_id,
1, 1, 0, 0, false);
if (ret != LDB_SUCCESS) {
return ret;
}
}
return LDB_SUCCESS;
}
/*
update an extended DN, including all meta data fields
see replmd_build_la_val for value names
*/
static int replmd_update_la_val(TALLOC_CTX *mem_ctx, struct ldb_val *v, struct dsdb_dn *dsdb_dn,
struct dsdb_dn *old_dsdb_dn, const struct GUID *invocation_id,
uint64_t seq_num, uint64_t local_usn, NTTIME nttime,
uint32_t version, bool deleted)
{
struct ldb_dn *dn = dsdb_dn->dn;
const char *tstring, *usn_string, *flags_string;
struct ldb_val tval;
struct ldb_val iid;
struct ldb_val usnv, local_usnv;
struct ldb_val vers, flagsv;
const struct ldb_val *old_addtime;
uint32_t old_version;
NTSTATUS status;
int ret;
const char *dnstring;
char *vstring;
uint32_t rmd_flags = deleted?DSDB_RMD_FLAG_DELETED:0;
tstring = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)nttime);
if (!tstring) {
return LDB_ERR_OPERATIONS_ERROR;
}
tval = data_blob_string_const(tstring);
usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)seq_num);
if (!usn_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
usnv = data_blob_string_const(usn_string);
usn_string = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)local_usn);
if (!usn_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
local_usnv = data_blob_string_const(usn_string);
status = GUID_to_ndr_blob(invocation_id, dn, &iid);
if (!NT_STATUS_IS_OK(status)) {
return LDB_ERR_OPERATIONS_ERROR;
}
flags_string = talloc_asprintf(mem_ctx, "%u", rmd_flags);
if (!flags_string) {
return LDB_ERR_OPERATIONS_ERROR;
}
flagsv = data_blob_string_const(flags_string);
ret = ldb_dn_set_extended_component(dn, "RMD_FLAGS", &flagsv);
if (ret != LDB_SUCCESS) return ret;
/* get the ADDTIME from the original */
old_addtime = ldb_dn_get_extended_component(old_dsdb_dn->dn, "RMD_ADDTIME");
if (old_addtime == NULL) {
old_addtime = &tval;
}
if (dsdb_dn != old_dsdb_dn) {
ret = ldb_dn_set_extended_component(dn, "RMD_ADDTIME", old_addtime);
if (ret != LDB_SUCCESS) return ret;
}
/* use our invocation id */
ret = ldb_dn_set_extended_component(dn, "RMD_INVOCID", &iid);
if (ret != LDB_SUCCESS) return ret;
/* changetime is the current time */
ret = ldb_dn_set_extended_component(dn, "RMD_CHANGETIME", &tval);
if (ret != LDB_SUCCESS) return ret;
/* update the USN */
ret = ldb_dn_set_extended_component(dn, "RMD_ORIGINATING_USN", &usnv);
if (ret != LDB_SUCCESS) return ret;
ret = ldb_dn_set_extended_component(dn, "RMD_LOCAL_USN", &local_usnv);
if (ret != LDB_SUCCESS) return ret;
/* increase the version by 1 */
status = dsdb_get_extended_dn_uint32(old_dsdb_dn->dn, &old_version, "RMD_VERSION");
if (NT_STATUS_IS_OK(status) && old_version >= version) {
version = old_version+1;
}
vstring = talloc_asprintf(dn, "%lu", (unsigned long)version);
vers = data_blob_string_const(vstring);
ret = ldb_dn_set_extended_component(dn, "RMD_VERSION", &vers);
if (ret != LDB_SUCCESS) return ret;
dnstring = dsdb_dn_get_extended_linearized(mem_ctx, dsdb_dn, 1);
if (dnstring == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
*v = data_blob_string_const(dnstring);
return LDB_SUCCESS;
}
/*
handle adding a linked attribute
*/
static int replmd_modify_la_add(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_message *msg,
struct ldb_message_element *el,
struct ldb_message_element *old_el,
const struct dsdb_attribute *schema_attr,
uint64_t seq_num,
time_t t,
struct GUID *msg_guid)
{
unsigned int i;
struct parsed_dn *dns, *old_dns;
TALLOC_CTX *tmp_ctx = talloc_new(msg);
int ret;
struct ldb_val *new_values = NULL;
unsigned int num_new_values = 0;
unsigned old_num_values = old_el?old_el->num_values:0;
const struct GUID *invocation_id;
struct ldb_context *ldb = ldb_module_get_ctx(module);
NTTIME now;
unix_to_nt_time(&now, t);
ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
invocation_id = samdb_ntds_invocation_id(ldb);
if (!invocation_id) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_check_upgrade_links(old_dns, old_num_values, old_el, invocation_id);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
/* for each new value, see if it exists already with the same GUID */
for (i=0; i<el->num_values; i++) {
struct parsed_dn *p = parsed_dn_find(old_dns, old_num_values, dns[i].guid, NULL);
if (p == NULL) {
/* this is a new linked attribute value */
new_values = talloc_realloc(tmp_ctx, new_values, struct ldb_val, num_new_values+1);
if (new_values == NULL) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_build_la_val(new_values, &new_values[num_new_values], dns[i].dsdb_dn,
invocation_id, seq_num, seq_num, now, 0, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
num_new_values++;
} else {
/* this is only allowed if the GUID was
previously deleted. */
uint32_t rmd_flags = dsdb_dn_rmd_flags(p->dsdb_dn->dn);
if (!(rmd_flags & DSDB_RMD_FLAG_DELETED)) {
ldb_asprintf_errstring(ldb, "Attribute %s already exists for target GUID %s",
el->name, GUID_string(tmp_ctx, p->guid));
talloc_free(tmp_ctx);
return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
}
ret = replmd_update_la_val(old_el->values, p->v, dns[i].dsdb_dn, p->dsdb_dn,
invocation_id, seq_num, seq_num, now, 0, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
ret = replmd_add_backlink(module, schema, msg_guid, dns[i].guid, true, schema_attr, true);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
/* add the new ones on to the end of the old values, constructing a new el->values */
el->values = talloc_realloc(msg->elements, old_el?old_el->values:NULL,
struct ldb_val,
old_num_values+num_new_values);
if (el->values == NULL) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
memcpy(&el->values[old_num_values], new_values, num_new_values*sizeof(struct ldb_val));
el->num_values = old_num_values + num_new_values;
talloc_steal(msg->elements, el->values);
talloc_steal(el->values, new_values);
talloc_free(tmp_ctx);
/* we now tell the backend to replace all existing values
with the one we have constructed */
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
/*
handle deleting all active linked attributes
*/
static int replmd_modify_la_delete(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_message *msg,
struct ldb_message_element *el,
struct ldb_message_element *old_el,
const struct dsdb_attribute *schema_attr,
uint64_t seq_num,
time_t t,
struct GUID *msg_guid)
{
unsigned int i;
struct parsed_dn *dns, *old_dns;
TALLOC_CTX *tmp_ctx = talloc_new(msg);
int ret;
const struct GUID *invocation_id;
struct ldb_context *ldb = ldb_module_get_ctx(module);
NTTIME now;
unix_to_nt_time(&now, t);
/* check if there is nothing to delete */
if ((!old_el || old_el->num_values == 0) &&
el->num_values == 0) {
return LDB_SUCCESS;
}
if (!old_el || old_el->num_values == 0) {
return LDB_ERR_NO_SUCH_ATTRIBUTE;
}
ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
invocation_id = samdb_ntds_invocation_id(ldb);
if (!invocation_id) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_check_upgrade_links(old_dns, old_el->num_values, old_el, invocation_id);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
el->values = NULL;
/* see if we are being asked to delete any links that
don't exist or are already deleted */
for (i=0; i<el->num_values; i++) {
struct parsed_dn *p = &dns[i];
struct parsed_dn *p2;
uint32_t rmd_flags;
p2 = parsed_dn_find(old_dns, old_el->num_values, p->guid, NULL);
if (!p2) {
ldb_asprintf_errstring(ldb, "Attribute %s doesn't exist for target GUID %s",
el->name, GUID_string(tmp_ctx, p->guid));
return LDB_ERR_NO_SUCH_ATTRIBUTE;
}
rmd_flags = dsdb_dn_rmd_flags(p2->dsdb_dn->dn);
if (rmd_flags & DSDB_RMD_FLAG_DELETED) {
ldb_asprintf_errstring(ldb, "Attribute %s already deleted for target GUID %s",
el->name, GUID_string(tmp_ctx, p->guid));
return LDB_ERR_NO_SUCH_ATTRIBUTE;
}
}
/* for each new value, see if it exists already with the same GUID
if it is not already deleted and matches the delete list then delete it
*/
for (i=0; i<old_el->num_values; i++) {
struct parsed_dn *p = &old_dns[i];
uint32_t rmd_flags;
if (el->num_values && parsed_dn_find(dns, el->num_values, p->guid, NULL) == NULL) {
continue;
}
rmd_flags = dsdb_dn_rmd_flags(p->dsdb_dn->dn);
if (rmd_flags & DSDB_RMD_FLAG_DELETED) continue;
ret = replmd_update_la_val(old_el->values, p->v, p->dsdb_dn, p->dsdb_dn,
invocation_id, seq_num, seq_num, now, 0, true);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = replmd_add_backlink(module, schema, msg_guid, old_dns[i].guid, false, schema_attr, true);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
el->values = talloc_steal(msg->elements, old_el->values);
el->num_values = old_el->num_values;
talloc_free(tmp_ctx);
/* we now tell the backend to replace all existing values
with the one we have constructed */
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
/*
handle replacing a linked attribute
*/
static int replmd_modify_la_replace(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_message *msg,
struct ldb_message_element *el,
struct ldb_message_element *old_el,
const struct dsdb_attribute *schema_attr,
uint64_t seq_num,
time_t t,
struct GUID *msg_guid)
{
unsigned int i;
struct parsed_dn *dns, *old_dns;
TALLOC_CTX *tmp_ctx = talloc_new(msg);
int ret;
const struct GUID *invocation_id;
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_val *new_values = NULL;
unsigned int num_new_values = 0;
unsigned int old_num_values = old_el?old_el->num_values:0;
NTTIME now;
unix_to_nt_time(&now, t);
/* check if there is nothing to replace */
if ((!old_el || old_el->num_values == 0) &&
el->num_values == 0) {
return LDB_SUCCESS;
}
ret = get_parsed_dns(module, tmp_ctx, el, &dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = get_parsed_dns(module, tmp_ctx, old_el, &old_dns, schema_attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
invocation_id = samdb_ntds_invocation_id(ldb);
if (!invocation_id) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_check_upgrade_links(old_dns, old_num_values, old_el, invocation_id);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
/* mark all the old ones as deleted */
for (i=0; i<old_num_values; i++) {
struct parsed_dn *old_p = &old_dns[i];
struct parsed_dn *p;
uint32_t rmd_flags = dsdb_dn_rmd_flags(old_p->dsdb_dn->dn);
if (rmd_flags & DSDB_RMD_FLAG_DELETED) continue;
ret = replmd_add_backlink(module, schema, msg_guid, old_dns[i].guid, false, schema_attr, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
p = parsed_dn_find(dns, el->num_values, old_p->guid, NULL);
if (p) {
/* we don't delete it if we are re-adding it */
continue;
}
ret = replmd_update_la_val(old_el->values, old_p->v, old_p->dsdb_dn, old_p->dsdb_dn,
invocation_id, seq_num, seq_num, now, 0, true);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
/* for each new value, either update its meta-data, or add it
* to old_el
*/
for (i=0; i<el->num_values; i++) {
struct parsed_dn *p = &dns[i], *old_p;
if (old_dns &&
(old_p = parsed_dn_find(old_dns,
old_num_values, p->guid, NULL)) != NULL) {
/* update in place */
ret = replmd_update_la_val(old_el->values, old_p->v, old_p->dsdb_dn,
old_p->dsdb_dn, invocation_id,
seq_num, seq_num, now, 0, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
} else {
/* add a new one */
new_values = talloc_realloc(tmp_ctx, new_values, struct ldb_val,
num_new_values+1);
if (new_values == NULL) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_build_la_val(new_values, &new_values[num_new_values], dns[i].dsdb_dn,
invocation_id, seq_num, seq_num, now, 0, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
num_new_values++;
}
ret = replmd_add_backlink(module, schema, msg_guid, dns[i].guid, true, schema_attr, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
/* add the new values to the end of old_el */
if (num_new_values != 0) {
el->values = talloc_realloc(msg->elements, old_el?old_el->values:NULL,
struct ldb_val, old_num_values+num_new_values);
if (el->values == NULL) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
memcpy(&el->values[old_num_values], &new_values[0],
sizeof(struct ldb_val)*num_new_values);
el->num_values = old_num_values + num_new_values;
talloc_steal(msg->elements, new_values);
} else {
el->values = old_el->values;
el->num_values = old_el->num_values;
talloc_steal(msg->elements, el->values);
}
talloc_free(tmp_ctx);
/* we now tell the backend to replace all existing values
with the one we have constructed */
el->flags = LDB_FLAG_MOD_REPLACE;
return LDB_SUCCESS;
}
/*
handle linked attributes in modify requests
*/
static int replmd_modify_handle_linked_attribs(struct ldb_module *module,
struct ldb_message *msg,
uint64_t seq_num, time_t t)
{
struct ldb_result *res;
unsigned int i;
int ret;
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_message *old_msg;
const struct dsdb_schema *schema;
struct GUID old_guid;
if (seq_num == 0) {
/* there the replmd_update_rpmd code has already
* checked and saw that there are no linked
* attributes */
return LDB_SUCCESS;
}
if (dsdb_functional_level(ldb) == DS_DOMAIN_FUNCTION_2000) {
/* don't do anything special for linked attributes */
return LDB_SUCCESS;
}
ret = dsdb_module_search_dn(module, msg, &res, msg->dn, NULL,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_REVEAL_INTERNALS |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT);
if (ret != LDB_SUCCESS) {
return ret;
}
schema = dsdb_get_schema(ldb, res);
if (!schema) {
return LDB_ERR_OPERATIONS_ERROR;
}
old_msg = res->msgs[0];
old_guid = samdb_result_guid(old_msg, "objectGUID");
for (i=0; i<msg->num_elements; i++) {
struct ldb_message_element *el = &msg->elements[i];
struct ldb_message_element *old_el, *new_el;
const struct dsdb_attribute *schema_attr
= dsdb_attribute_by_lDAPDisplayName(schema, el->name);
if (!schema_attr) {
ldb_asprintf_errstring(ldb,
"attribute %s is not a valid attribute in schema", el->name);
return LDB_ERR_OBJECT_CLASS_VIOLATION;
}
if (schema_attr->linkID == 0) {
continue;
}
if ((schema_attr->linkID & 1) == 1) {
/* Odd is for the target. Illegal to modify */
ldb_asprintf_errstring(ldb,
"attribute %s must not be modified directly, it is a linked attribute", el->name);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
old_el = ldb_msg_find_element(old_msg, el->name);
switch (el->flags & LDB_FLAG_MOD_MASK) {
case LDB_FLAG_MOD_REPLACE:
ret = replmd_modify_la_replace(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid);
break;
case LDB_FLAG_MOD_DELETE:
ret = replmd_modify_la_delete(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid);
break;
case LDB_FLAG_MOD_ADD:
ret = replmd_modify_la_add(module, schema, msg, el, old_el, schema_attr, seq_num, t, &old_guid);
break;
default:
ldb_asprintf_errstring(ldb,
"invalid flags 0x%x for %s linked attribute",
el->flags, el->name);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
if (ret != LDB_SUCCESS) {
return ret;
}
if (old_el) {
ldb_msg_remove_attr(old_msg, el->name);
}
ldb_msg_add_empty(old_msg, el->name, 0, &new_el);
new_el->num_values = el->num_values;
new_el->values = talloc_steal(msg->elements, el->values);
/* TODO: this relises a bit too heavily on the exact
behaviour of ldb_msg_find_element and
ldb_msg_remove_element */
old_el = ldb_msg_find_element(msg, el->name);
if (old_el != el) {
ldb_msg_remove_element(msg, old_el);
i--;
}
}
talloc_free(res);
return ret;
}
static int replmd_modify(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct replmd_replicated_request *ac;
struct ldb_request *down_req;
struct ldb_message *msg;
time_t t = time(NULL);
int ret;
bool is_urgent = false;
struct loadparm_context *lp_ctx;
char *referral;
unsigned int functional_level;
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.mod.message->dn)) {
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
functional_level = dsdb_functional_level(ldb);
lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
struct loadparm_context);
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_modify\n");
ac = replmd_ctx_init(module, req);
if (!ac) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* we have to copy the message as the caller might have it as a const */
msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
if (msg == NULL) {
ldb_oom(ldb);
talloc_free(ac);
return LDB_ERR_OPERATIONS_ERROR;
}
ldb_msg_remove_attr(msg, "whenChanged");
ldb_msg_remove_attr(msg, "uSNChanged");
ret = replmd_update_rpmd(module, ac->schema, req, msg, &ac->seq_num, t, &is_urgent);
if (ret == LDB_ERR_REFERRAL) {
referral = talloc_asprintf(req,
"ldap://%s/%s",
lpcfg_dnsdomain(lp_ctx),
ldb_dn_get_linearized(msg->dn));
ret = ldb_module_send_referral(req, referral);
talloc_free(ac);
return ldb_module_done(req, NULL, NULL, ret);
}
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
ret = replmd_modify_handle_linked_attribs(module, msg, ac->seq_num, t);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* TODO:
* - replace the old object with the newly constructed one
*/
ac->is_urgent = is_urgent;
ret = ldb_build_mod_req(&down_req, ldb, ac,
msg,
req->controls,
ac, replmd_op_callback,
req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* If we are in functional level 2000, then
* replmd_modify_handle_linked_attribs will have done
* nothing */
if (functional_level == DS_DOMAIN_FUNCTION_2000) {
ret = ldb_request_add_control(down_req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
}
talloc_steal(down_req, msg);
/* we only change whenChanged and uSNChanged if the seq_num
has changed */
if (ac->seq_num != 0) {
if (add_time_element(msg, "whenChanged", t) != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
if (add_uint64_element(msg, "uSNChanged", ac->seq_num) != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
}
/* go on with the call chain */
return ldb_next_request(module, down_req);
}
static int replmd_rename_callback(struct ldb_request *req, struct ldb_reply *ares);
/*
handle a rename request
On a rename we need to do an extra ldb_modify which sets the
whenChanged and uSNChanged attributes. We do this in a callback after the success.
*/
static int replmd_rename(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct replmd_replicated_request *ac;
int ret;
struct ldb_request *down_req;
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.mod.message->dn)) {
return ldb_next_request(module, req);
}
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_rename\n");
ac = replmd_ctx_init(module, req);
if (!ac) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_build_rename_req(&down_req, ldb, ac,
ac->req->op.rename.olddn,
ac->req->op.rename.newdn,
ac->req->controls,
ac, replmd_rename_callback,
ac->req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* go on with the call chain */
return ldb_next_request(module, down_req);
}
/* After the rename is compleated, update the whenchanged etc */
static int replmd_rename_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct replmd_replicated_request *ac;
struct ldb_request *down_req;
struct ldb_message *msg;
time_t t = time(NULL);
int ret;
ac = talloc_get_type(req->context, struct replmd_replicated_request);
ldb = ldb_module_get_ctx(ac->module);
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);
}
/* Get a sequence number from the backend */
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ac->seq_num);
if (ret != LDB_SUCCESS) {
return ret;
}
/* TODO:
* - replace the old object with the newly constructed one
*/
msg = ldb_msg_new(ac);
if (msg == NULL) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
msg->dn = ac->req->op.rename.newdn;
ret = ldb_build_mod_req(&down_req, ldb, ac,
msg,
req->controls,
ac, replmd_op_callback,
req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
talloc_steal(down_req, msg);
if (add_time_element(msg, "whenChanged", t) != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
if (add_uint64_element(msg, "uSNChanged", ac->seq_num) != LDB_SUCCESS) {
talloc_free(ac);
return ret;
}
/* go on with the call chain - do the modify after the rename */
return ldb_next_request(ac->module, down_req);
}
/*
remove links from objects that point at this object when an object
is deleted
*/
static int replmd_delete_remove_link(struct ldb_module *module,
const struct dsdb_schema *schema,
struct ldb_dn *dn,
struct ldb_message_element *el,
const struct dsdb_attribute *sa)
{
unsigned int i;
TALLOC_CTX *tmp_ctx = talloc_new(module);
struct ldb_context *ldb = ldb_module_get_ctx(module);
for (i=0; i<el->num_values; i++) {
struct dsdb_dn *dsdb_dn;
NTSTATUS status;
int ret;
struct GUID guid2;
struct ldb_message *msg;
const struct dsdb_attribute *target_attr;
struct ldb_message_element *el2;
struct ldb_val dn_val;
if (dsdb_dn_is_deleted_val(&el->values[i])) {
continue;
}
dsdb_dn = dsdb_dn_parse(tmp_ctx, ldb, &el->values[i], sa->syntax->ldap_oid);
if (!dsdb_dn) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid2, "GUID");
if (!NT_STATUS_IS_OK(status)) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
/* remove the link */
msg = ldb_msg_new(tmp_ctx);
if (!msg) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
msg->dn = dsdb_dn->dn;
target_attr = dsdb_attribute_by_linkID(schema, sa->linkID ^ 1);
if (target_attr == NULL) {
continue;
}
ret = ldb_msg_add_empty(msg, target_attr->lDAPDisplayName, LDB_FLAG_MOD_DELETE, &el2);
if (ret != LDB_SUCCESS) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
dn_val = data_blob_string_const(ldb_dn_get_linearized(dn));
el2->values = &dn_val;
el2->num_values = 1;
ret = dsdb_module_modify(module, msg, DSDB_FLAG_OWN_MODULE);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
/*
handle update of replication meta data for deletion of objects
This also handles the mapping of delete to a rename operation
to allow deletes to be replicated.
*/
static int replmd_delete(struct ldb_module *module, struct ldb_request *req)
{
int ret = LDB_ERR_OTHER;
bool retb, disallow_move_on_delete;
struct ldb_dn *old_dn, *new_dn;
const char *rdn_name;
const struct ldb_val *rdn_value, *new_rdn_value;
struct GUID guid;
struct ldb_context *ldb = ldb_module_get_ctx(module);
const struct dsdb_schema *schema;
struct ldb_message *msg, *old_msg;
struct ldb_message_element *el;
TALLOC_CTX *tmp_ctx;
struct ldb_result *res, *parent_res;
const char *preserved_attrs[] = {
/* yes, this really is a hard coded list. See MS-ADTS
section 3.1.1.5.5.1.1 */
"nTSecurityDescriptor", "attributeID", "attributeSyntax", "dNReferenceUpdate", "dNSHostName",
"flatName", "governsID", "groupType", "instanceType", "lDAPDisplayName", "legacyExchangeDN",
"isDeleted", "isRecycled", "lastKnownParent", "msDS-LastKnownRDN", "mS-DS-CreatorSID",
"mSMQOwnerID", "nCName", "objectClass", "distinguishedName", "objectGUID", "objectSid",
"oMSyntax", "proxiedObjectName", "name", "replPropertyMetaData", "sAMAccountName",
"securityIdentifier", "sIDHistory", "subClassOf", "systemFlags", "trustPartner", "trustDirection",
"trustType", "trustAttributes", "userAccountControl", "uSNChanged", "uSNCreated", "whenCreated",
"whenChanged", NULL};
unsigned int i, el_count = 0;
enum deletion_state { OBJECT_NOT_DELETED=1, OBJECT_DELETED=2, OBJECT_RECYCLED=3,
OBJECT_TOMBSTONE=4, OBJECT_REMOVED=5 };
enum deletion_state deletion_state, next_deletion_state;
bool enabled;
if (ldb_dn_is_special(req->op.del.dn)) {
return ldb_next_request(module, req);
}
tmp_ctx = talloc_new(ldb);
if (!tmp_ctx) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
schema = dsdb_get_schema(ldb, tmp_ctx);
if (!schema) {
return LDB_ERR_OPERATIONS_ERROR;
}
old_dn = ldb_dn_copy(tmp_ctx, req->op.del.dn);
/* we need the complete msg off disk, so we can work out which
attributes need to be removed */
ret = dsdb_module_search_dn(module, tmp_ctx, &res, old_dn, NULL,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_REVEAL_INTERNALS |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
old_msg = res->msgs[0];
ret = dsdb_recyclebin_enabled(module, &enabled);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (ldb_msg_check_string_attribute(old_msg, "isDeleted", "TRUE")) {
if (!enabled) {
deletion_state = OBJECT_TOMBSTONE;
next_deletion_state = OBJECT_REMOVED;
} else if (ldb_msg_check_string_attribute(old_msg, "isRecycled", "TRUE")) {
deletion_state = OBJECT_RECYCLED;
next_deletion_state = OBJECT_REMOVED;
} else {
deletion_state = OBJECT_DELETED;
next_deletion_state = OBJECT_RECYCLED;
}
} else {
deletion_state = OBJECT_NOT_DELETED;
if (enabled) {
next_deletion_state = OBJECT_DELETED;
} else {
next_deletion_state = OBJECT_TOMBSTONE;
}
}
if (next_deletion_state == OBJECT_REMOVED) {
struct auth_session_info *session_info =
(struct auth_session_info *)ldb_get_opaque(ldb, "sessionInfo");
if (security_session_user_level(session_info, NULL) != SECURITY_SYSTEM) {
ldb_asprintf_errstring(ldb, "Refusing to delete deleted object %s",
ldb_dn_get_linearized(old_msg->dn));
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* it is already deleted - really remove it this time */
talloc_free(tmp_ctx);
return ldb_next_request(module, req);
}
rdn_name = ldb_dn_get_rdn_name(old_dn);
rdn_value = ldb_dn_get_rdn_val(old_dn);
msg = ldb_msg_new(tmp_ctx);
if (msg == NULL) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
msg->dn = old_dn;
if (deletion_state == OBJECT_NOT_DELETED){
/* consider the SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE flag */
disallow_move_on_delete =
(ldb_msg_find_attr_as_int(old_msg, "systemFlags", 0)
& SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE);
/* work out where we will be renaming this object to */
if (!disallow_move_on_delete) {
ret = dsdb_get_deleted_objects_dn(ldb, tmp_ctx, old_dn,
&new_dn);
if (ret != LDB_SUCCESS) {
/* this is probably an attempted delete on a partition
* that doesn't allow delete operations, such as the
* schema partition */
ldb_asprintf_errstring(ldb, "No Deleted Objects container for DN %s",
ldb_dn_get_linearized(old_dn));
talloc_free(tmp_ctx);
return LDB_ERR_UNWILLING_TO_PERFORM;
}
} else {
new_dn = ldb_dn_get_parent(tmp_ctx, old_dn);
if (new_dn == NULL) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
}
/* get the objects GUID from the search we just did */
guid = samdb_result_guid(old_msg, "objectGUID");
/* Add a formatted child */
retb = ldb_dn_add_child_fmt(new_dn, "%s=%s\\0ADEL:%s",
rdn_name,
rdn_value->data,
GUID_string(tmp_ctx, &guid));
if (!retb) {
DEBUG(0,(__location__ ": Unable to add a formatted child to dn: %s",
ldb_dn_get_linearized(new_dn)));
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_string(msg, "isDeleted", "TRUE");
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add isDeleted string to the msg\n"));
ldb_module_oom(module);
talloc_free(tmp_ctx);
return ret;
}
msg->elements[el_count++].flags = LDB_FLAG_MOD_ADD;
}
/*
now we need to modify the object in the following ways:
- add isDeleted=TRUE
- update rDN and name, with new rDN
- remove linked attributes
- remove objectCategory and sAMAccountType
- remove attribs not on the preserved list
- preserved if in above list, or is rDN
- remove all linked attribs from this object
- remove all links from other objects to this object
- add lastKnownParent
- update replPropertyMetaData?
see MS-ADTS "Tombstone Requirements" section 3.1.1.5.5.1.1
*/
/* we need the storage form of the parent GUID */
ret = dsdb_module_search_dn(module, tmp_ctx, &parent_res,
ldb_dn_get_parent(tmp_ctx, old_dn), NULL,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
DSDB_SEARCH_REVEAL_INTERNALS|
DSDB_SEARCH_SHOW_RECYCLED);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (deletion_state == OBJECT_NOT_DELETED){
ret = ldb_msg_add_steal_string(msg, "lastKnownParent",
ldb_dn_get_extended_linearized(tmp_ctx, parent_res->msgs[0]->dn, 1));
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add lastKnownParent string to the msg\n"));
ldb_module_oom(module);
talloc_free(tmp_ctx);
return ret;
}
msg->elements[el_count++].flags = LDB_FLAG_MOD_ADD;
}
switch (next_deletion_state){
case OBJECT_DELETED:
ret = ldb_msg_add_value(msg, "msDS-LastKnownRDN", rdn_value, NULL);
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add msDS-LastKnownRDN string to the msg\n"));
ldb_module_oom(module);
talloc_free(tmp_ctx);
return ret;
}
msg->elements[el_count++].flags = LDB_FLAG_MOD_ADD;
ret = ldb_msg_add_empty(msg, "objectCategory", LDB_FLAG_MOD_DELETE, NULL);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return ret;
}
ret = ldb_msg_add_empty(msg, "sAMAccountType", LDB_FLAG_MOD_DELETE, NULL);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return ret;
}
break;
case OBJECT_RECYCLED:
case OBJECT_TOMBSTONE:
/* we also mark it as recycled, meaning this object can't be
recovered (we are stripping its attributes) */
if (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008_R2) {
ret = ldb_msg_add_string(msg, "isRecycled", "TRUE");
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Failed to add isRecycled string to the msg\n"));
ldb_module_oom(module);
talloc_free(tmp_ctx);
return ret;
}
msg->elements[el_count++].flags = LDB_FLAG_MOD_ADD;
}
/* work out which of the old attributes we will be removing */
for (i=0; i<old_msg->num_elements; i++) {
const struct dsdb_attribute *sa;
el = &old_msg->elements[i];
sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
if (!sa) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
if (ldb_attr_cmp(el->name, rdn_name) == 0) {
/* don't remove the rDN */
continue;
}
if (sa->linkID && sa->linkID & 1) {
ret = replmd_delete_remove_link(module, schema, old_dn, el, sa);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
continue;
}
if (!sa->linkID && ldb_attr_in_list(preserved_attrs, el->name)) {
continue;
}
ret = ldb_msg_add_empty(msg, el->name, LDB_FLAG_MOD_DELETE, &el);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
ldb_module_oom(module);
return ret;
}
}
break;
default:
break;
}
if (deletion_state == OBJECT_NOT_DELETED) {
const struct dsdb_attribute *sa;
/* work out what the new rdn value is, for updating the
rDN and name fields */
new_rdn_value = ldb_dn_get_rdn_val(new_dn);
sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
if (!sa) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ldb_msg_add_value(msg, sa->lDAPDisplayName, new_rdn_value,
&el);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
el->flags = LDB_FLAG_MOD_REPLACE;
el = ldb_msg_find_element(old_msg, "name");
if (el) {
ret = ldb_msg_add_value(msg, "name", new_rdn_value, &el);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
el->flags = LDB_FLAG_MOD_REPLACE;
}
}
ret = dsdb_module_modify(module, msg, DSDB_FLAG_OWN_MODULE);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb, "replmd_delete: Failed to modify object %s in delete - %s",
ldb_dn_get_linearized(old_dn), ldb_errstring(ldb));
talloc_free(tmp_ctx);
return ret;
}
if (deletion_state == OBJECT_NOT_DELETED) {
/* now rename onto the new DN */
ret = dsdb_module_rename(module, old_dn, new_dn, DSDB_FLAG_NEXT_MODULE);
if (ret != LDB_SUCCESS){
DEBUG(0,(__location__ ": Failed to rename object from '%s' to '%s' - %s\n",
ldb_dn_get_linearized(old_dn),
ldb_dn_get_linearized(new_dn),
ldb_errstring(ldb)));
talloc_free(tmp_ctx);
return ret;
}
}
talloc_free(tmp_ctx);
return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
}
static int replmd_replicated_request_error(struct replmd_replicated_request *ar, int ret)
{
return ret;
}
static int replmd_replicated_request_werror(struct replmd_replicated_request *ar, WERROR status)
{
int ret = LDB_ERR_OTHER;
/* TODO: do some error mapping */
return ret;
}
static int replmd_replicated_apply_add(struct replmd_replicated_request *ar)
{
struct ldb_context *ldb;
struct ldb_request *change_req;
enum ndr_err_code ndr_err;
struct ldb_message *msg;
struct replPropertyMetaDataBlob *md;
struct ldb_val md_value;
unsigned int i;
int ret;
/*
* TODO: check if the parent object exist
*/
/*
* TODO: handle the conflict case where an object with the
* same name exist
*/
ldb = ldb_module_get_ctx(ar->module);
msg = ar->objs->objects[ar->index_current].msg;
md = ar->objs->objects[ar->index_current].meta_data;
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ar->seq_num);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = ldb_msg_add_value(msg, "objectGUID", &ar->objs->objects[ar->index_current].guid_value, NULL);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNCreated", ar->seq_num);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ar->seq_num);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
/* remove any message elements that have zero values */
for (i=0; i<msg->num_elements; i++) {
struct ldb_message_element *el = &msg->elements[i];
if (el->num_values == 0) {
DEBUG(4,(__location__ ": Removing attribute %s with num_values==0\n",
el->name));
memmove(el, el+1, sizeof(*el)*(msg->num_elements - (i+1)));
msg->num_elements--;
i--;
continue;
}
}
/*
* the meta data array is already sorted by the caller
*/
for (i=0; i < md->ctr.ctr1.count; i++) {
md->ctr.ctr1.array[i].local_usn = ar->seq_num;
}
ndr_err = ndr_push_struct_blob(&md_value, msg, md,
(ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
ret = ldb_msg_add_value(msg, "replPropertyMetaData", &md_value, NULL);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
replmd_ldb_message_sort(msg, ar->schema);
if (DEBUGLVL(4)) {
char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_ADD, msg);
DEBUG(4, ("DRS replication add message:\n%s\n", s));
talloc_free(s);
}
ret = ldb_build_add_req(&change_req,
ldb,
ar,
msg,
ar->controls,
ar,
replmd_op_callback,
ar->req);
LDB_REQ_SET_LOCATION(change_req);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
return ldb_next_request(ar->module, change_req);
}
/*
return true if an update is newer than an existing entry
see section 5.11 of MS-ADTS
*/
static bool replmd_update_is_newer(const struct GUID *current_invocation_id,
const struct GUID *update_invocation_id,
uint32_t current_version,
uint32_t update_version,
uint32_t current_usn,
uint32_t update_usn,
NTTIME current_change_time,
NTTIME update_change_time)
{
if (GUID_compare(update_invocation_id, current_invocation_id) == 0) {
if (update_usn != current_usn) {
return update_usn >= current_usn;
}
}
if (update_version != current_version) {
return update_version >= current_version;
}
if (update_change_time != current_change_time) {
return update_change_time >= current_change_time;
}
return GUID_compare(update_invocation_id, current_invocation_id) >= 0;
}
static bool replmd_replPropertyMetaData1_is_newer(struct replPropertyMetaData1 *cur_m,
struct replPropertyMetaData1 *new_m)
{
return replmd_update_is_newer(&cur_m->originating_invocation_id,
&new_m->originating_invocation_id,
cur_m->version,
new_m->version,
cur_m->originating_usn,
new_m->originating_usn,
cur_m->originating_change_time,
new_m->originating_change_time);
}
static struct replPropertyMetaData1 *
replmd_replPropertyMetaData1_find_attid(struct replPropertyMetaDataBlob *md_blob,
enum drsuapi_DsAttributeId attid)
{
uint32_t i;
struct replPropertyMetaDataCtr1 *rpmd_ctr = &md_blob->ctr.ctr1;
for (i = 0; i < rpmd_ctr->count; i++) {
if (rpmd_ctr->array[i].attid == attid) {
return &rpmd_ctr->array[i];
}
}
return NULL;
}
/*
handle renames that come in over DRS replication
*/
static int replmd_replicated_handle_rename(struct replmd_replicated_request *ar,
struct ldb_message *msg,
struct replPropertyMetaDataBlob *rmd,
struct replPropertyMetaDataBlob *omd)
{
struct replPropertyMetaData1 *md_remote;
struct replPropertyMetaData1 *md_local;
if (ldb_dn_compare(msg->dn, ar->search_msg->dn) == 0) {
/* no rename */
return LDB_SUCCESS;
}
/* now we need to check for double renames. We could have a
* local rename pending which our replication partner hasn't
* received yet. We choose which one wins by looking at the
* attribute stamps on the two objects, the newer one wins
*/
md_remote = replmd_replPropertyMetaData1_find_attid(rmd, DRSUAPI_ATTRIBUTE_name);
md_local = replmd_replPropertyMetaData1_find_attid(omd, DRSUAPI_ATTRIBUTE_name);
/* if there is no name attribute then we have to assume the
object we've received is in fact newer */
if (!md_remote || !md_local ||
replmd_replPropertyMetaData1_is_newer(md_local, md_remote)) {
DEBUG(4,("replmd_replicated_request rename %s => %s\n",
ldb_dn_get_linearized(ar->search_msg->dn),
ldb_dn_get_linearized(msg->dn)));
/* pass rename to the next module
* so it doesn't appear as an originating update */
return dsdb_module_rename(ar->module,
ar->search_msg->dn, msg->dn,
DSDB_FLAG_NEXT_MODULE | DSDB_MODIFY_RELAX);
}
/* we're going to keep our old object */
DEBUG(4,(__location__ ": Keeping object %s and rejecting older rename to %s\n",
ldb_dn_get_linearized(ar->search_msg->dn),
ldb_dn_get_linearized(msg->dn)));
return LDB_SUCCESS;
}
static int replmd_replicated_apply_merge(struct replmd_replicated_request *ar)
{
struct ldb_context *ldb;
struct ldb_request *change_req;
enum ndr_err_code ndr_err;
struct ldb_message *msg;
struct replPropertyMetaDataBlob *rmd;
struct replPropertyMetaDataBlob omd;
const struct ldb_val *omd_value;
struct replPropertyMetaDataBlob nmd;
struct ldb_val nmd_value;
unsigned int i;
uint32_t j,ni=0;
unsigned int removed_attrs = 0;
int ret;
ldb = ldb_module_get_ctx(ar->module);
msg = ar->objs->objects[ar->index_current].msg;
rmd = ar->objs->objects[ar->index_current].meta_data;
ZERO_STRUCT(omd);
omd.version = 1;
/* find existing meta data */
omd_value = ldb_msg_find_ldb_val(ar->search_msg, "replPropertyMetaData");
if (omd_value) {
ndr_err = ndr_pull_struct_blob(omd_value, ar, &omd,
(ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
if (omd.version != 1) {
return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
}
}
/* handle renames that come in over DRS */
ret = replmd_replicated_handle_rename(ar, msg, rmd, &omd);
if (ret != LDB_SUCCESS) {
ldb_debug(ldb, LDB_DEBUG_FATAL,
"replmd_replicated_request rename %s => %s failed - %s\n",
ldb_dn_get_linearized(ar->search_msg->dn),
ldb_dn_get_linearized(msg->dn),
ldb_errstring(ldb));
return replmd_replicated_request_werror(ar, WERR_DS_DRA_DB_ERROR);
}
ZERO_STRUCT(nmd);
nmd.version = 1;
nmd.ctr.ctr1.count = omd.ctr.ctr1.count + rmd->ctr.ctr1.count;
nmd.ctr.ctr1.array = talloc_array(ar,
struct replPropertyMetaData1,
nmd.ctr.ctr1.count);
if (!nmd.ctr.ctr1.array) return replmd_replicated_request_werror(ar, WERR_NOMEM);
/* first copy the old meta data */
for (i=0; i < omd.ctr.ctr1.count; i++) {
nmd.ctr.ctr1.array[ni] = omd.ctr.ctr1.array[i];
ni++;
}
/* now merge in the new meta data */
for (i=0; i < rmd->ctr.ctr1.count; i++) {
bool found = false;
for (j=0; j < ni; j++) {
bool cmp;
if (rmd->ctr.ctr1.array[i].attid != nmd.ctr.ctr1.array[j].attid) {
continue;
}
cmp = replmd_replPropertyMetaData1_is_newer(&nmd.ctr.ctr1.array[j],
&rmd->ctr.ctr1.array[i]);
if (cmp) {
/* replace the entry */
nmd.ctr.ctr1.array[j] = rmd->ctr.ctr1.array[i];
found = true;
break;
}
if (rmd->ctr.ctr1.array[i].attid != DRSUAPI_ATTRIBUTE_instanceType) {
DEBUG(3,("Discarding older DRS attribute update to %s on %s from %s\n",
msg->elements[i-removed_attrs].name,
ldb_dn_get_linearized(msg->dn),
GUID_string(ar, &rmd->ctr.ctr1.array[i].originating_invocation_id)));
}
/* we don't want to apply this change so remove the attribute */
ldb_msg_remove_element(msg, &msg->elements[i-removed_attrs]);
removed_attrs++;
found = true;
break;
}
if (found) continue;
nmd.ctr.ctr1.array[ni] = rmd->ctr.ctr1.array[i];
ni++;
}
/*
* finally correct the size of the meta_data array
*/
nmd.ctr.ctr1.count = ni;
/*
* the rdn attribute (the alias for the name attribute),
* 'cn' for most objects is the last entry in the meta data array
* we have stored
*
* sort the new meta data array
*/
ret = replmd_replPropertyMetaDataCtr1_sort(&nmd.ctr.ctr1, ar->schema, msg->dn);
if (ret != LDB_SUCCESS) {
return ret;
}
/*
* check if some replicated attributes left, otherwise skip the ldb_modify() call
*/
if (msg->num_elements == 0) {
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: skip replace\n",
ar->index_current);
ar->index_current++;
return replmd_replicated_apply_next(ar);
}
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_replicated_apply_merge[%u]: replace %u attributes\n",
ar->index_current, msg->num_elements);
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &ar->seq_num);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
for (i=0; i<ni; i++) {
nmd.ctr.ctr1.array[i].local_usn = ar->seq_num;
}
/* create the meta data value */
ndr_err = ndr_push_struct_blob(&nmd_value, msg, &nmd,
(ndr_push_flags_fn_t)ndr_push_replPropertyMetaDataBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
/*
* when we know that we'll modify the record, add the whenChanged, uSNChanged
* and replPopertyMetaData attributes
*/
ret = ldb_msg_add_string(msg, "whenChanged", ar->objs->objects[ar->index_current].when_changed);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = samdb_msg_add_uint64(ldb, msg, msg, "uSNChanged", ar->seq_num);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
ret = ldb_msg_add_value(msg, "replPropertyMetaData", &nmd_value, NULL);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
replmd_ldb_message_sort(msg, ar->schema);
/* we want to replace the old values */
for (i=0; i < msg->num_elements; i++) {
msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
}
if (DEBUGLVL(4)) {
char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_MODIFY, msg);
DEBUG(4, ("DRS replication modify message:\n%s\n", s));
talloc_free(s);
}
ret = ldb_build_mod_req(&change_req,
ldb,
ar,
msg,
ar->controls,
ar,
replmd_op_callback,
ar->req);
LDB_REQ_SET_LOCATION(change_req);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
return ldb_next_request(ar->module, change_req);
}
static int replmd_replicated_apply_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct replmd_replicated_request *ar = talloc_get_type(req->context,
struct replmd_replicated_request);
int ret;
if (!ares) {
return ldb_module_done(ar->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS &&
ares->error != LDB_ERR_NO_SUCH_OBJECT) {
return ldb_module_done(ar->req, ares->controls,
ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
ar->search_msg = talloc_steal(ar, ares->message);
break;
case LDB_REPLY_REFERRAL:
/* we ignore referrals */
break;
case LDB_REPLY_DONE:
if (ar->search_msg != NULL) {
ret = replmd_replicated_apply_merge(ar);
} else {
ret = replmd_replicated_apply_add(ar);
}
if (ret != LDB_SUCCESS) {
return ldb_module_done(ar->req, NULL, NULL, ret);
}
}
talloc_free(ares);
return LDB_SUCCESS;
}
static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar);
static int replmd_replicated_apply_next(struct replmd_replicated_request *ar)
{
struct ldb_context *ldb;
int ret;
char *tmp_str;
char *filter;
struct ldb_request *search_req;
struct ldb_search_options_control *options;
if (ar->index_current >= ar->objs->num_objects) {
/* done with it, go to next stage */
return replmd_replicated_uptodate_vector(ar);
}
ldb = ldb_module_get_ctx(ar->module);
ar->search_msg = NULL;
tmp_str = ldb_binary_encode(ar, ar->objs->objects[ar->index_current].guid_value);
if (!tmp_str) return replmd_replicated_request_werror(ar, WERR_NOMEM);
filter = talloc_asprintf(ar, "(objectGUID=%s)", tmp_str);
if (!filter) return replmd_replicated_request_werror(ar, WERR_NOMEM);
talloc_free(tmp_str);
ret = ldb_build_search_req(&search_req,
ldb,
ar,
NULL,
LDB_SCOPE_SUBTREE,
filter,
NULL,
NULL,
ar,
replmd_replicated_apply_search_callback,
ar->req);
LDB_REQ_SET_LOCATION(search_req);
ret = ldb_request_add_control(search_req, LDB_CONTROL_SHOW_RECYCLED_OID,
true, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
/* we need to cope with cross-partition links, so search for
the GUID over all partitions */
options = talloc(search_req, struct ldb_search_options_control);
if (options == NULL) {
DEBUG(0, (__location__ ": out of memory\n"));
return LDB_ERR_OPERATIONS_ERROR;
}
options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
ret = ldb_request_add_control(search_req,
LDB_CONTROL_SEARCH_OPTIONS_OID,
true, options);
if (ret != LDB_SUCCESS) {
return ret;
}
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
return ldb_next_request(ar->module, search_req);
}
static int replmd_replicated_uptodate_modify_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct replmd_replicated_request *ar = talloc_get_type(req->context,
struct replmd_replicated_request);
ldb = ldb_module_get_ctx(ar->module);
if (!ares) {
return ldb_module_done(ar->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ar->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Invalid reply type\n!");
return ldb_module_done(ar->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
talloc_free(ares);
return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
}
static int replmd_replicated_uptodate_modify(struct replmd_replicated_request *ar)
{
struct ldb_context *ldb;
struct ldb_request *change_req;
enum ndr_err_code ndr_err;
struct ldb_message *msg;
struct replUpToDateVectorBlob ouv;
const struct ldb_val *ouv_value;
const struct drsuapi_DsReplicaCursor2CtrEx *ruv;
struct replUpToDateVectorBlob nuv;
struct ldb_val nuv_value;
struct ldb_message_element *nuv_el = NULL;
const struct GUID *our_invocation_id;
struct ldb_message_element *orf_el = NULL;
struct repsFromToBlob nrf;
struct ldb_val *nrf_value = NULL;
struct ldb_message_element *nrf_el = NULL;
unsigned int i;
uint32_t j,ni=0;
bool found = false;
time_t t = time(NULL);
NTTIME now;
int ret;
uint32_t instanceType;
ldb = ldb_module_get_ctx(ar->module);
ruv = ar->objs->uptodateness_vector;
ZERO_STRUCT(ouv);
ouv.version = 2;
ZERO_STRUCT(nuv);
nuv.version = 2;
unix_to_nt_time(&now, t);
instanceType = ldb_msg_find_attr_as_uint(ar->search_msg, "instanceType", 0);
if (! (instanceType & INSTANCE_TYPE_IS_NC_HEAD)) {
DEBUG(4,(__location__ ": Skipping UDV and repsFrom update as not NC root: %s\n",
ldb_dn_get_linearized(ar->search_msg->dn)));
return ldb_module_done(ar->req, NULL, NULL, LDB_SUCCESS);
}
/*
* first create the new replUpToDateVector
*/
ouv_value = ldb_msg_find_ldb_val(ar->search_msg, "replUpToDateVector");
if (ouv_value) {
ndr_err = ndr_pull_struct_blob(ouv_value, ar, &ouv,
(ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
if (ouv.version != 2) {
return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
}
}
/*
* the new uptodateness vector will at least
* contain 1 entry, one for the source_dsa
*
* plus optional values from our old vector and the one from the source_dsa
*/
nuv.ctr.ctr2.count = 1 + ouv.ctr.ctr2.count;
if (ruv) nuv.ctr.ctr2.count += ruv->count;
nuv.ctr.ctr2.cursors = talloc_array(ar,
struct drsuapi_DsReplicaCursor2,
nuv.ctr.ctr2.count);
if (!nuv.ctr.ctr2.cursors) return replmd_replicated_request_werror(ar, WERR_NOMEM);
/* first copy the old vector */
for (i=0; i < ouv.ctr.ctr2.count; i++) {
nuv.ctr.ctr2.cursors[ni] = ouv.ctr.ctr2.cursors[i];
ni++;
}
/* get our invocation_id if we have one already attached to the ldb */
our_invocation_id = samdb_ntds_invocation_id(ldb);
/* merge in the source_dsa vector is available */
for (i=0; (ruv && i < ruv->count); i++) {
found = false;
if (our_invocation_id &&
GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
our_invocation_id)) {
continue;
}
for (j=0; j < ni; j++) {
if (!GUID_equal(&ruv->cursors[i].source_dsa_invocation_id,
&nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
continue;
}
found = true;
/*
* we update only the highest_usn and not the latest_sync_success time,
* because the last success stands for direct replication
*/
if (ruv->cursors[i].highest_usn > nuv.ctr.ctr2.cursors[j].highest_usn) {
nuv.ctr.ctr2.cursors[j].highest_usn = ruv->cursors[i].highest_usn;
}
break;
}
if (found) continue;
/* if it's not there yet, add it */
nuv.ctr.ctr2.cursors[ni] = ruv->cursors[i];
ni++;
}
/*
* merge in the current highwatermark for the source_dsa
*/
found = false;
for (j=0; j < ni; j++) {
if (!GUID_equal(&ar->objs->source_dsa->source_dsa_invocation_id,
&nuv.ctr.ctr2.cursors[j].source_dsa_invocation_id)) {
continue;
}
found = true;
/*
* here we update the highest_usn and last_sync_success time
* because we're directly replicating from the source_dsa
*
* and use the tmp_highest_usn because this is what we have just applied
* to our ldb
*/
nuv.ctr.ctr2.cursors[j].highest_usn = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
nuv.ctr.ctr2.cursors[j].last_sync_success = now;
break;
}
if (!found) {
/*
* here we update the highest_usn and last_sync_success time
* because we're directly replicating from the source_dsa
*
* and use the tmp_highest_usn because this is what we have just applied
* to our ldb
*/
nuv.ctr.ctr2.cursors[ni].source_dsa_invocation_id= ar->objs->source_dsa->source_dsa_invocation_id;
nuv.ctr.ctr2.cursors[ni].highest_usn = ar->objs->source_dsa->highwatermark.tmp_highest_usn;
nuv.ctr.ctr2.cursors[ni].last_sync_success = now;
ni++;
}
/*
* finally correct the size of the cursors array
*/
nuv.ctr.ctr2.count = ni;
/*
* sort the cursors
*/
TYPESAFE_QSORT(nuv.ctr.ctr2.cursors, nuv.ctr.ctr2.count, drsuapi_DsReplicaCursor2_compare);
/*
* create the change ldb_message
*/
msg = ldb_msg_new(ar);
if (!msg) return replmd_replicated_request_werror(ar, WERR_NOMEM);
msg->dn = ar->search_msg->dn;
ndr_err = ndr_push_struct_blob(&nuv_value, msg, &nuv,
(ndr_push_flags_fn_t)ndr_push_replUpToDateVectorBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
ret = ldb_msg_add_value(msg, "replUpToDateVector", &nuv_value, &nuv_el);
if (ret != LDB_SUCCESS) {
return replmd_replicated_request_error(ar, ret);
}
nuv_el->flags = LDB_FLAG_MOD_REPLACE;
/*
* now create the new repsFrom value from the given repsFromTo1 structure
*/
ZERO_STRUCT(nrf);
nrf.version = 1;
nrf.ctr.ctr1 = *ar->objs->source_dsa;
/* and fix some values... */
nrf.ctr.ctr1.consecutive_sync_failures = 0;
nrf.ctr.ctr1.last_success = now;
nrf.ctr.ctr1.last_attempt = now;
nrf.ctr.ctr1.result_last_attempt = WERR_OK;
nrf.ctr.ctr1.highwatermark.highest_usn = nrf.ctr.ctr1.highwatermark.tmp_highest_usn;
/*
* first see if we already have a repsFrom value for the current source dsa
* if so we'll later replace this value
*/
orf_el = ldb_msg_find_element(ar->search_msg, "repsFrom");
if (orf_el) {
for (i=0; i < orf_el->num_values; i++) {
struct repsFromToBlob *trf;
trf = talloc(ar, struct repsFromToBlob);
if (!trf) return replmd_replicated_request_werror(ar, WERR_NOMEM);
ndr_err = ndr_pull_struct_blob(&orf_el->values[i], trf, trf,
(ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
if (trf->version != 1) {
return replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
}
/*
* we compare the source dsa objectGUID not the invocation_id
* because we want only one repsFrom value per source dsa
* and when the invocation_id of the source dsa has changed we don't need
* the old repsFrom with the old invocation_id
*/
if (!GUID_equal(&trf->ctr.ctr1.source_dsa_obj_guid,
&ar->objs->source_dsa->source_dsa_obj_guid)) {
talloc_free(trf);
continue;
}
talloc_free(trf);
nrf_value = &orf_el->values[i];
break;
}
/*
* copy over all old values to the new ldb_message
*/
ret = ldb_msg_add_empty(msg, "repsFrom", 0, &nrf_el);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
*nrf_el = *orf_el;
}
/*
* if we haven't found an old repsFrom value for the current source dsa
* we'll add a new value
*/
if (!nrf_value) {
struct ldb_val zero_value;
ZERO_STRUCT(zero_value);
ret = ldb_msg_add_value(msg, "repsFrom", &zero_value, &nrf_el);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
nrf_value = &nrf_el->values[nrf_el->num_values - 1];
}
/* we now fill the value which is already attached to ldb_message */
ndr_err = ndr_push_struct_blob(nrf_value, msg,
&nrf,
(ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
return replmd_replicated_request_werror(ar, ntstatus_to_werror(nt_status));
}
/*
* the ldb_message_element for the attribute, has all the old values and the new one
* so we'll replace the whole attribute with all values
*/
nrf_el->flags = LDB_FLAG_MOD_REPLACE;
if (DEBUGLVL(4)) {
char *s = ldb_ldif_message_string(ldb, ar, LDB_CHANGETYPE_MODIFY, msg);
DEBUG(4, ("DRS replication uptodate modify message:\n%s\n", s));
talloc_free(s);
}
/* prepare the ldb_modify() request */
ret = ldb_build_mod_req(&change_req,
ldb,
ar,
msg,
ar->controls,
ar,
replmd_replicated_uptodate_modify_callback,
ar->req);
LDB_REQ_SET_LOCATION(change_req);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
return ldb_next_request(ar->module, change_req);
}
static int replmd_replicated_uptodate_search_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct replmd_replicated_request *ar = talloc_get_type(req->context,
struct replmd_replicated_request);
int ret;
if (!ares) {
return ldb_module_done(ar->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->error != LDB_SUCCESS &&
ares->error != LDB_ERR_NO_SUCH_OBJECT) {
return ldb_module_done(ar->req, ares->controls,
ares->response, ares->error);
}
switch (ares->type) {
case LDB_REPLY_ENTRY:
ar->search_msg = talloc_steal(ar, ares->message);
break;
case LDB_REPLY_REFERRAL:
/* we ignore referrals */
break;
case LDB_REPLY_DONE:
if (ar->search_msg == NULL) {
ret = replmd_replicated_request_werror(ar, WERR_DS_DRA_INTERNAL_ERROR);
} else {
ret = replmd_replicated_uptodate_modify(ar);
}
if (ret != LDB_SUCCESS) {
return ldb_module_done(ar->req, NULL, NULL, ret);
}
}
talloc_free(ares);
return LDB_SUCCESS;
}
static int replmd_replicated_uptodate_vector(struct replmd_replicated_request *ar)
{
struct ldb_context *ldb;
int ret;
static const char *attrs[] = {
"replUpToDateVector",
"repsFrom",
"instanceType",
NULL
};
struct ldb_request *search_req;
ldb = ldb_module_get_ctx(ar->module);
ar->search_msg = NULL;
ret = ldb_build_search_req(&search_req,
ldb,
ar,
ar->objs->partition_dn,
LDB_SCOPE_BASE,
"(objectClass=*)",
attrs,
NULL,
ar,
replmd_replicated_uptodate_search_callback,
ar->req);
LDB_REQ_SET_LOCATION(search_req);
if (ret != LDB_SUCCESS) return replmd_replicated_request_error(ar, ret);
return ldb_next_request(ar->module, search_req);
}
static int replmd_extended_replicated_objects(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct dsdb_extended_replicated_objects *objs;
struct replmd_replicated_request *ar;
struct ldb_control **ctrls;
int ret;
uint32_t i;
struct replmd_private *replmd_private =
talloc_get_type(ldb_module_get_private(module), struct replmd_private);
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "replmd_extended_replicated_objects\n");
objs = talloc_get_type(req->op.extended.data, struct dsdb_extended_replicated_objects);
if (!objs) {
ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: invalid extended data\n");
return LDB_ERR_PROTOCOL_ERROR;
}
if (objs->version != DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION) {
ldb_debug(ldb, LDB_DEBUG_FATAL, "replmd_extended_replicated_objects: extended data invalid version [%u != %u]\n",
objs->version, DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION);
return LDB_ERR_PROTOCOL_ERROR;
}
ar = replmd_ctx_init(module, req);
if (!ar)
return LDB_ERR_OPERATIONS_ERROR;
/* Set the flags to have the replmd_op_callback run over the full set of objects */
ar->apply_mode = true;
ar->objs = objs;
ar->schema = dsdb_get_schema(ldb, ar);
if (!ar->schema) {
ldb_debug_set(ldb, LDB_DEBUG_FATAL, "replmd_ctx_init: no loaded schema found\n");
talloc_free(ar);
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return LDB_ERR_CONSTRAINT_VIOLATION;
}
ctrls = req->controls;
if (req->controls) {
req->controls = talloc_memdup(ar, req->controls,
talloc_get_size(req->controls));
if (!req->controls) return replmd_replicated_request_werror(ar, WERR_NOMEM);
}
/* This allows layers further down to know if a change came in over replication */
ret = ldb_request_add_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID, false, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
/* If this change contained linked attributes in the body
* (rather than in the links section) we need to update
* backlinks in linked_attributes */
ret = ldb_request_add_control(req, DSDB_CONTROL_APPLY_LINKS, false, NULL);
if (ret != LDB_SUCCESS) {
return ret;
}
ar->controls = req->controls;
req->controls = ctrls;
DEBUG(4,("linked_attributes_count=%u\n", objs->linked_attributes_count));
/* save away the linked attributes for the end of the
transaction */
for (i=0; i<ar->objs->linked_attributes_count; i++) {
struct la_entry *la_entry;
if (replmd_private->la_ctx == NULL) {
replmd_private->la_ctx = talloc_new(replmd_private);
}
la_entry = talloc(replmd_private->la_ctx, struct la_entry);
if (la_entry == NULL) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
la_entry->la = talloc(la_entry, struct drsuapi_DsReplicaLinkedAttribute);
if (la_entry->la == NULL) {
talloc_free(la_entry);
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
*la_entry->la = ar->objs->linked_attributes[i];
/* we need to steal the non-scalars so they stay
around until the end of the transaction */
talloc_steal(la_entry->la, la_entry->la->identifier);
talloc_steal(la_entry->la, la_entry->la->value.blob);
DLIST_ADD(replmd_private->la_list, la_entry);
}
return replmd_replicated_apply_next(ar);
}
/*
process one linked attribute structure
*/
static int replmd_process_linked_attribute(struct ldb_module *module,
struct la_entry *la_entry)
{
struct drsuapi_DsReplicaLinkedAttribute *la = la_entry->la;
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_message *msg;
TALLOC_CTX *tmp_ctx = talloc_new(la_entry);
const struct dsdb_schema *schema = dsdb_get_schema(ldb, tmp_ctx);
int ret;
const struct dsdb_attribute *attr;
struct dsdb_dn *dsdb_dn;
uint64_t seq_num = 0;
struct ldb_message_element *old_el;
WERROR status;
time_t t = time(NULL);
struct ldb_result *res;
const char *attrs[2];
struct parsed_dn *pdn_list, *pdn;
struct GUID guid = GUID_zero();
NTSTATUS ntstatus;
bool active = (la->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)?true:false;
const struct GUID *our_invocation_id;
/*
linked_attributes[0]:
&objs->linked_attributes[i]: struct drsuapi_DsReplicaLinkedAttribute
identifier : *
identifier: struct drsuapi_DsReplicaObjectIdentifier
__ndr_size : 0x0000003a (58)
__ndr_size_sid : 0x00000000 (0)
guid : 8e95b6a9-13dd-4158-89db-3220a5be5cc7
sid : S-0-0
__ndr_size_dn : 0x00000000 (0)
dn : ''
attid : DRSUAPI_ATTRIBUTE_member (0x1F)
value: struct drsuapi_DsAttributeValue
__ndr_size : 0x0000007e (126)
blob : *
blob : DATA_BLOB length=126
flags : 0x00000001 (1)
1: DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE
originating_add_time : Wed Sep 2 22:20:01 2009 EST
meta_data: struct drsuapi_DsReplicaMetaData
version : 0x00000015 (21)
originating_change_time : Wed Sep 2 23:39:07 2009 EST
originating_invocation_id: 794640f3-18cf-40ee-a211-a93992b67a64
originating_usn : 0x000000000001e19c (123292)
(for cases where the link is to a normal DN)
&target: struct drsuapi_DsReplicaObjectIdentifier3
__ndr_size : 0x0000007e (126)
__ndr_size_sid : 0x0000001c (28)
guid : 7639e594-db75-4086-b0d4-67890ae46031
sid : S-1-5-21-2848215498-2472035911-1947525656-19924
__ndr_size_dn : 0x00000022 (34)
dn : 'CN=UOne,OU=TestOU,DC=vsofs8,DC=com'
*/
/* find the attribute being modified */
attr = dsdb_attribute_by_attributeID_id(schema, la->attid);
if (attr == NULL) {
DEBUG(0, (__location__ ": Unable to find attributeID 0x%x\n", la->attid));
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
attrs[0] = attr->lDAPDisplayName;
attrs[1] = NULL;
/* get the existing message from the db for the object with
this GUID, returning attribute being modified. We will then
use this msg as the basis for a modify call */
ret = dsdb_module_search(module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE, attrs,
DSDB_FLAG_NEXT_MODULE |
DSDB_SEARCH_SEARCH_ALL_PARTITIONS |
DSDB_SEARCH_SHOW_RECYCLED |
DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT |
DSDB_SEARCH_REVEAL_INTERNALS,
"objectGUID=%s", GUID_string(tmp_ctx, &la->identifier->guid));
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (res->count != 1) {
ldb_asprintf_errstring(ldb, "DRS linked attribute for GUID %s - DN not found",
GUID_string(tmp_ctx, &la->identifier->guid));
talloc_free(tmp_ctx);
return LDB_ERR_NO_SUCH_OBJECT;
}
msg = res->msgs[0];
if (msg->num_elements == 0) {
ret = ldb_msg_add_empty(msg, attr->lDAPDisplayName, LDB_FLAG_MOD_REPLACE, &old_el);
if (ret != LDB_SUCCESS) {
ldb_module_oom(module);
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
} else {
old_el = &msg->elements[0];
old_el->flags = LDB_FLAG_MOD_REPLACE;
}
/* parse the existing links */
ret = get_parsed_dns(module, tmp_ctx, old_el, &pdn_list, attr->syntax->ldap_oid);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
/* get our invocationId */
our_invocation_id = samdb_ntds_invocation_id(ldb);
if (!our_invocation_id) {
ldb_debug_set(ldb, LDB_DEBUG_ERROR, __location__ ": unable to find invocationId\n");
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = replmd_check_upgrade_links(pdn_list, old_el->num_values, old_el, our_invocation_id);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
status = dsdb_dn_la_from_blob(ldb, attr, schema, tmp_ctx, la->value.blob, &dsdb_dn);
if (!W_ERROR_IS_OK(status)) {
ldb_asprintf_errstring(ldb, "Failed to parsed linked attribute blob for %s on %s - %s\n",
old_el->name, ldb_dn_get_linearized(msg->dn), win_errstr(status));
return LDB_ERR_OPERATIONS_ERROR;
}
ntstatus = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid, "GUID");
if (!NT_STATUS_IS_OK(ntstatus) && active) {
ldb_asprintf_errstring(ldb, "Failed to find GUID in linked attribute blob for %s on %s from %s",
old_el->name,
ldb_dn_get_linearized(dsdb_dn->dn),
ldb_dn_get_linearized(msg->dn));
return LDB_ERR_OPERATIONS_ERROR;
}
/* re-resolve the DN by GUID, as the DRS server may give us an
old DN value */
ret = dsdb_module_dn_by_guid(module, dsdb_dn, &guid, &dsdb_dn->dn);
if (ret != LDB_SUCCESS) {
DEBUG(2,(__location__ ": WARNING: Failed to re-resolve GUID %s - using %s",
GUID_string(tmp_ctx, &guid),
ldb_dn_get_linearized(dsdb_dn->dn)));
}
/* see if this link already exists */
pdn = parsed_dn_find(pdn_list, old_el->num_values, &guid, dsdb_dn->dn);
if (pdn != NULL) {
/* see if this update is newer than what we have already */
struct GUID invocation_id = GUID_zero();
uint32_t version = 0;
uint32_t originating_usn = 0;
NTTIME change_time = 0;
uint32_t rmd_flags = dsdb_dn_rmd_flags(pdn->dsdb_dn->dn);
dsdb_get_extended_dn_guid(pdn->dsdb_dn->dn, &invocation_id, "RMD_INVOCID");
dsdb_get_extended_dn_uint32(pdn->dsdb_dn->dn, &version, "RMD_VERSION");
dsdb_get_extended_dn_uint32(pdn->dsdb_dn->dn, &originating_usn, "RMD_ORIGINATING_USN");
dsdb_get_extended_dn_nttime(pdn->dsdb_dn->dn, &change_time, "RMD_CHANGETIME");
if (!replmd_update_is_newer(&invocation_id,
&la->meta_data.originating_invocation_id,
version,
la->meta_data.version,
originating_usn,
la->meta_data.originating_usn,
change_time,
la->meta_data.originating_change_time)) {
DEBUG(3,("Discarding older DRS linked attribute update to %s on %s from %s\n",
old_el->name, ldb_dn_get_linearized(msg->dn),
GUID_string(tmp_ctx, &la->meta_data.originating_invocation_id)));
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
/* get a seq_num for this change */
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (!(rmd_flags & DSDB_RMD_FLAG_DELETED)) {
/* remove the existing backlink */
ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid, false, attr, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
ret = replmd_update_la_val(tmp_ctx, pdn->v, dsdb_dn, pdn->dsdb_dn,
&la->meta_data.originating_invocation_id,
la->meta_data.originating_usn, seq_num,
la->meta_data.originating_change_time,
la->meta_data.version,
!active);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (active) {
/* add the new backlink */
ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid, true, attr, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
} else {
/* get a seq_num for this change */
ret = ldb_sequence_number(ldb, LDB_SEQ_NEXT, &seq_num);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
old_el->values = talloc_realloc(msg->elements, old_el->values,
struct ldb_val, old_el->num_values+1);
if (!old_el->values) {
ldb_module_oom(module);
return LDB_ERR_OPERATIONS_ERROR;
}
old_el->num_values++;
ret = replmd_build_la_val(tmp_ctx, &old_el->values[old_el->num_values-1], dsdb_dn,
&la->meta_data.originating_invocation_id,
la->meta_data.originating_usn, seq_num,
la->meta_data.originating_change_time,
la->meta_data.version,
(la->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)?false:true);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
if (active) {
ret = replmd_add_backlink(module, schema, &la->identifier->guid, &guid,
true, attr, false);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
}
}
/* we only change whenChanged and uSNChanged if the seq_num
has changed */
if (add_time_element(msg, "whenChanged", t) != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ldb_operr(ldb);
}
if (add_uint64_element(msg, "uSNChanged", seq_num) != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ldb_operr(ldb);
}
old_el = ldb_msg_find_element(msg, attr->lDAPDisplayName);
if (old_el == NULL) {
talloc_free(tmp_ctx);
return ldb_operr(ldb);
}
ret = dsdb_check_single_valued_link(attr, old_el);
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ret;
}
ret = dsdb_module_modify(module, msg, DSDB_FLAG_NEXT_MODULE | DSDB_MODIFY_RELAX);
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, tmp_ctx, LDB_CHANGETYPE_MODIFY, msg));
talloc_free(tmp_ctx);
return ret;
}
talloc_free(tmp_ctx);
return ret;
}
static int replmd_extended(struct ldb_module *module, struct ldb_request *req)
{
if (strcmp(req->op.extended.oid, DSDB_EXTENDED_REPLICATED_OBJECTS_OID) == 0) {
return replmd_extended_replicated_objects(module, req);
}
return ldb_next_request(module, req);
}
/*
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 object is created. During a vampire, w2k8 sends us linked
attributes before the objects they are part of.
*/
static int replmd_start_transaction(struct ldb_module *module)
{
/* create our private structure for this transaction */
struct replmd_private *replmd_private = talloc_get_type(ldb_module_get_private(module),
struct replmd_private);
replmd_txn_cleanup(replmd_private);
/* free any leftover mod_usn records from cancelled
transactions */
while (replmd_private->ncs) {
struct nc_entry *e = replmd_private->ncs;
DLIST_REMOVE(replmd_private->ncs, e);
talloc_free(e);
}
return ldb_next_start_trans(module);
}
/*
on prepare commit we loop over our queued la_context structures and
apply each of them
*/
static int replmd_prepare_commit(struct ldb_module *module)
{
struct replmd_private *replmd_private =
talloc_get_type(ldb_module_get_private(module), struct replmd_private);
struct la_entry *la, *prev;
struct la_backlink *bl;
int ret;
/* 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 */
for (la = DLIST_TAIL(replmd_private->la_list); la; la=prev) {
prev = DLIST_PREV(la);
DLIST_REMOVE(replmd_private->la_list, la);
ret = replmd_process_linked_attribute(module, la);
if (ret != LDB_SUCCESS) {
replmd_txn_cleanup(replmd_private);
return ret;
}
}
/* process our backlink list, creating and deleting backlinks
as necessary */
for (bl=replmd_private->la_backlinks; bl; bl=bl->next) {
ret = replmd_process_backlink(module, bl);
if (ret != LDB_SUCCESS) {
replmd_txn_cleanup(replmd_private);
return ret;
}
}
replmd_txn_cleanup(replmd_private);
/* possibly change @REPLCHANGED */
ret = replmd_notify_store(module);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_prepare_commit(module);
}
static int replmd_del_transaction(struct ldb_module *module)
{
struct replmd_private *replmd_private =
talloc_get_type(ldb_module_get_private(module), struct replmd_private);
replmd_txn_cleanup(replmd_private);
return ldb_next_del_trans(module);
}
_PUBLIC_ const struct ldb_module_ops ldb_repl_meta_data_module_ops = {
.name = "repl_meta_data",
.init_context = replmd_init,
.add = replmd_add,
.modify = replmd_modify,
.rename = replmd_rename,
.del = replmd_delete,
.extended = replmd_extended,
.start_transaction = replmd_start_transaction,
.prepare_commit = replmd_prepare_commit,
.del_transaction = replmd_del_transaction,
};
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