4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2007
5 Copyright (C) Simo Sorce <idra@samba.org> 2008
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * Component: ldb linked_attributes module
26 * Description: Module to ensure linked attribute pairs remain in sync
28 * Author: Andrew Bartlett
32 #include "ldb/include/ldb.h"
33 #include "ldb/include/ldb_errors.h"
34 #include "ldb/include/ldb_private.h"
35 #include "dsdb/samdb/samdb.h"
38 struct la_op_store
*next
;
39 enum la_op
{LA_OP_ADD
, LA_OP_DEL
} op
;
45 struct replace_context
{
46 struct la_context
*ac
;
47 unsigned int num_elements
;
48 struct ldb_message_element
*el
;
52 const struct dsdb_schema
*schema
;
53 struct ldb_module
*module
;
54 struct ldb_request
*req
;
56 struct replace_context
*rc
;
57 struct la_op_store
*ops
;
58 struct la_op_store
*cur
;
61 static struct la_context
*linked_attributes_init(struct ldb_module
*module
,
62 struct ldb_request
*req
)
64 struct la_context
*ac
;
66 ac
= talloc_zero(req
, struct la_context
);
68 ldb_set_errstring(module
->ldb
, "Out of Memory");
72 ac
->schema
= dsdb_get_schema(module
->ldb
);
79 /* Common routine to handle reading the attributes and creating a
80 * series of modify requests */
81 static int la_store_op(struct la_context
*ac
,
82 enum la_op op
, char *dn
,
83 const char *name
, const char *value
)
85 struct la_op_store
*os
, *tmp
;
88 op_dn
= ldb_dn_new(ac
, ac
->module
->ldb
, dn
);
90 return LDB_ERR_OPERATIONS_ERROR
;
93 /* optimize out del - add operations that would end up
95 if (ac
->ops
&& op
== LA_OP_DEL
) {
96 /* do a linear search to find out if there is
97 * an equivalent add */
102 if (tmp
->op
== LA_OP_ADD
) {
104 if ((strcmp(name
, tmp
->name
) == 0) &&
105 (strcmp(value
, tmp
->value
) == 0) &&
106 (ldb_dn_compare(op_dn
, tmp
->dn
) == 0)) {
114 /* pair found, remove it and return */
115 os
->next
= tmp
->next
;
122 os
= talloc_zero(ac
, struct la_op_store
);
124 return LDB_ERR_OPERATIONS_ERROR
;
129 os
->dn
= talloc_steal(os
, op_dn
);
131 return LDB_ERR_OPERATIONS_ERROR
;
134 os
->name
= talloc_strdup(os
, name
);
136 return LDB_ERR_OPERATIONS_ERROR
;
139 if ((op
!= LA_OP_DEL
) && (value
== NULL
)) {
140 return LDB_ERR_OPERATIONS_ERROR
;
143 os
->value
= talloc_strdup(os
, value
);
145 return LDB_ERR_OPERATIONS_ERROR
;
159 static int la_op_search_callback(struct ldb_request
*req
,
160 struct ldb_reply
*ares
);
161 static int la_do_mod_request(struct la_context
*ac
);
162 static int la_mod_callback(struct ldb_request
*req
,
163 struct ldb_reply
*ares
);
164 static int la_down_req(struct la_context
*ac
);
165 static int la_down_callback(struct ldb_request
*req
,
166 struct ldb_reply
*ares
);
171 static int linked_attributes_add(struct ldb_module
*module
, struct ldb_request
*req
)
173 const struct dsdb_attribute
*target_attr
;
174 struct la_context
*ac
;
175 const char *attr_name
;
176 const char *attr_val
;
180 if (ldb_dn_is_special(req
->op
.add
.message
->dn
)) {
181 /* do not manipulate our control entries */
182 return ldb_next_request(module
, req
);
185 ac
= linked_attributes_init(module
, req
);
187 return LDB_ERR_OPERATIONS_ERROR
;
191 /* without schema, this doesn't make any sense */
193 return ldb_next_request(module
, req
);
196 /* Need to ensure we only have forward links being specified */
197 for (i
=0; i
< req
->op
.add
.message
->num_elements
; i
++) {
198 const struct ldb_message_element
*el
= &req
->op
.add
.message
->elements
[i
];
199 const struct dsdb_attribute
*schema_attr
200 = dsdb_attribute_by_lDAPDisplayName(ac
->schema
, el
->name
);
202 ldb_asprintf_errstring(module
->ldb
,
203 "attribute %s is not a valid attribute in schema", el
->name
);
204 return LDB_ERR_OBJECT_CLASS_VIOLATION
;
206 /* We have a valid attribute, now find out if it is linked */
207 if (schema_attr
->linkID
== 0) {
211 if ((schema_attr
->linkID
& 1) == 1) {
212 /* Odd is for the target. Illigal to modify */
213 ldb_asprintf_errstring(module
->ldb
,
214 "attribute %s must not be modified directly, it is a linked attribute", el
->name
);
215 return LDB_ERR_UNWILLING_TO_PERFORM
;
218 /* Even link IDs are for the originating attribute */
219 target_attr
= dsdb_attribute_by_linkID(ac
->schema
, schema_attr
->linkID
+ 1);
222 * windows 2003 has a broken schema where
223 * the definition of msDS-IsDomainFor
224 * is missing (which is supposed to be
225 * the backlink of the msDS-HasDomainNCs
231 attr_name
= target_attr
->lDAPDisplayName
;
232 attr_val
= ldb_dn_get_linearized(ac
->req
->op
.add
.message
->dn
);
234 for (j
= 0; j
< el
->num_values
; j
++) {
235 ret
= la_store_op(ac
, LA_OP_ADD
,
236 (char *)el
->values
[j
].data
,
237 attr_name
, attr_val
);
238 if (ret
!= LDB_SUCCESS
) {
244 /* if no linked attributes are present continue */
245 if (ac
->ops
== NULL
) {
247 return ldb_next_request(module
, req
);
250 /* start with the first one */
251 return la_do_mod_request(ac
);
254 static int la_mod_search_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
256 const struct dsdb_attribute
*schema_attr
;
257 const struct dsdb_attribute
*target_attr
;
258 struct ldb_message_element
*search_el
;
259 struct replace_context
*rc
;
260 struct la_context
*ac
;
261 const char *attr_name
;
264 int ret
= LDB_SUCCESS
;
266 ac
= talloc_get_type(req
->context
, struct la_context
);
270 return ldb_module_done(ac
->req
, NULL
, NULL
,
271 LDB_ERR_OPERATIONS_ERROR
);
273 if (ares
->error
!= LDB_SUCCESS
) {
274 return ldb_module_done(ac
->req
, ares
->controls
,
275 ares
->response
, ares
->error
);
278 /* Only entries are interesting, and we only want the olddn */
279 switch (ares
->type
) {
280 case LDB_REPLY_ENTRY
:
282 if (ldb_dn_compare(ares
->message
->dn
, ac
->req
->op
.mod
.message
->dn
) != 0) {
283 /* Guh? We only asked for this DN */
284 ldb_oom(ac
->module
->ldb
);
286 return ldb_module_done(ac
->req
, NULL
, NULL
,
287 LDB_ERR_OPERATIONS_ERROR
);
290 dn
= ldb_dn_get_linearized(ac
->req
->op
.add
.message
->dn
);
292 for (i
= 0; i
< rc
->num_elements
; i
++) {
294 schema_attr
= dsdb_attribute_by_lDAPDisplayName(ac
->schema
, rc
->el
[i
].name
);
296 ldb_asprintf_errstring(ac
->module
->ldb
,
297 "attribute %s is not a valid attribute in schema",
300 return ldb_module_done(ac
->req
, NULL
, NULL
,
301 LDB_ERR_OBJECT_CLASS_VIOLATION
);
304 search_el
= ldb_msg_find_element(ares
->message
,
307 /* See if this element already exists */
308 /* otherwise just ignore as
309 * the add has already been scheduled */
314 target_attr
= dsdb_attribute_by_linkID(ac
->schema
, schema_attr
->linkID
+ 1);
317 * windows 2003 has a broken schema where
318 * the definition of msDS-IsDomainFor
319 * is missing (which is supposed to be
320 * the backlink of the msDS-HasDomainNCs
325 attr_name
= target_attr
->lDAPDisplayName
;
327 /* make sure we manage each value */
328 for (j
= 0; j
< search_el
->num_values
; j
++) {
329 ret
= la_store_op(ac
, LA_OP_DEL
,
330 (char *)search_el
->values
[j
].data
,
332 if (ret
!= LDB_SUCCESS
) {
334 return ldb_module_done(ac
->req
,
342 case LDB_REPLY_REFERRAL
:
350 /* All mods set up, start with the first one */
351 ret
= la_do_mod_request(ac
);
352 if (ret
!= LDB_SUCCESS
) {
353 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
364 static int linked_attributes_modify(struct ldb_module
*module
, struct ldb_request
*req
)
366 /* Look over list of modifications */
367 /* Find if any are for linked attributes */
368 /* Determine the effect of the modification */
369 /* Apply the modify to the linked entry */
372 struct la_context
*ac
;
373 struct ldb_request
*search_req
;
376 if (ldb_dn_is_special(req
->op
.mod
.message
->dn
)) {
377 /* do not manipulate our control entries */
378 return ldb_next_request(module
, req
);
381 ac
= linked_attributes_init(module
, req
);
383 return LDB_ERR_OPERATIONS_ERROR
;
387 /* without schema, this doesn't make any sense */
388 return ldb_next_request(module
, req
);
393 for (i
=0; i
< req
->op
.mod
.message
->num_elements
; i
++) {
394 bool store_el
= false;
395 const char *attr_name
;
396 const char *attr_val
;
397 const struct dsdb_attribute
*target_attr
;
398 const struct ldb_message_element
*el
= &req
->op
.mod
.message
->elements
[i
];
399 const struct dsdb_attribute
*schema_attr
400 = dsdb_attribute_by_lDAPDisplayName(ac
->schema
, el
->name
);
402 ldb_asprintf_errstring(module
->ldb
,
403 "attribute %s is not a valid attribute in schema", el
->name
);
404 return LDB_ERR_OBJECT_CLASS_VIOLATION
;
406 /* We have a valid attribute, now find out if it is linked */
407 if (schema_attr
->linkID
== 0) {
411 if ((schema_attr
->linkID
& 1) == 1) {
412 /* Odd is for the target. Illegal to modify */
413 ldb_asprintf_errstring(module
->ldb
,
414 "attribute %s must not be modified directly, it is a linked attribute", el
->name
);
415 return LDB_ERR_UNWILLING_TO_PERFORM
;
418 /* Even link IDs are for the originating attribute */
420 /* Now find the target attribute */
421 target_attr
= dsdb_attribute_by_linkID(ac
->schema
, schema_attr
->linkID
+ 1);
424 * windows 2003 has a broken schema where
425 * the definition of msDS-IsDomainFor
426 * is missing (which is supposed to be
427 * the backlink of the msDS-HasDomainNCs
433 attr_name
= target_attr
->lDAPDisplayName
;
434 attr_val
= ldb_dn_get_linearized(ac
->req
->op
.mod
.message
->dn
);
436 switch (el
->flags
& LDB_FLAG_MOD_MASK
) {
437 case LDB_FLAG_MOD_REPLACE
:
438 /* treat as just a normal add the delete part is handled by the callback */
441 /* break intentionally missing */
443 case LDB_FLAG_MOD_ADD
:
445 /* For each value being added, we need to setup the adds */
446 for (j
= 0; j
< el
->num_values
; j
++) {
447 ret
= la_store_op(ac
, LA_OP_ADD
,
448 (char *)el
->values
[j
].data
,
449 attr_name
, attr_val
);
450 if (ret
!= LDB_SUCCESS
) {
456 case LDB_FLAG_MOD_DELETE
:
458 if (el
->num_values
) {
459 /* For each value being deleted, we need to setup the delete */
460 for (j
= 0; j
< el
->num_values
; j
++) {
461 ret
= la_store_op(ac
, LA_OP_DEL
,
462 (char *)el
->values
[j
].data
,
463 attr_name
, attr_val
);
464 if (ret
!= LDB_SUCCESS
) {
469 /* Flag that there was a DELETE
470 * without a value specified, so we
471 * need to look for the old value */
479 struct ldb_message_element
*search_el
;
481 /* Fill out ac->rc only if we have to find the old values */
483 ac
->rc
= talloc_zero(ac
, struct replace_context
);
485 ldb_oom(module
->ldb
);
486 return LDB_ERR_OPERATIONS_ERROR
;
490 search_el
= talloc_realloc(ac
->rc
, ac
->rc
->el
,
491 struct ldb_message_element
,
492 ac
->rc
->num_elements
+1);
494 ldb_oom(module
->ldb
);
495 return LDB_ERR_OPERATIONS_ERROR
;
497 ac
->rc
->el
= search_el
;
499 ac
->rc
->el
[ac
->rc
->num_elements
] = *el
;
500 ac
->rc
->num_elements
++;
504 /* both replace and delete without values are handled in the callback
505 * after the search on the entry to be modified is performed */
507 /* Only bother doing a search of this entry (to find old
508 * values) if replace or delete operations are attempted */
512 attrs
= talloc_array(ac
->rc
, const char *, ac
->rc
->num_elements
+1);
514 ldb_oom(module
->ldb
);
515 return LDB_ERR_OPERATIONS_ERROR
;
517 for (i
= 0; i
< ac
->rc
->num_elements
; i
++) {
518 attrs
[i
] = ac
->rc
->el
[i
].name
;
522 /* The callback does all the hard work here */
523 ret
= ldb_build_search_req(&search_req
, module
->ldb
, ac
,
524 req
->op
.mod
.message
->dn
,
526 "(objectClass=*)", attrs
,
528 ac
, la_mod_search_callback
,
531 if (ret
== LDB_SUCCESS
) {
532 talloc_steal(search_req
, attrs
);
534 ret
= ldb_next_request(module
, search_req
);
540 /* Jump directly to handling the modifies */
541 ret
= la_do_mod_request(ac
);
543 /* nothing to do for this module, proceed */
545 ret
= ldb_next_request(module
, req
);
553 static int linked_attributes_op(struct ldb_module
*module
, struct ldb_request
*req
)
555 struct ldb_request
*search_req
;
556 struct ldb_dn
*base_dn
;
557 struct la_context
*ac
;
562 /* This gets complex: We need to:
563 - Do a search for the entry
564 - Wait for these result to appear
565 - In the callback for the result, issue a modify
566 request based on the linked attributes found
567 - Wait for each modify result
571 switch (req
->operation
) {
573 base_dn
= req
->op
.rename
.olddn
;
576 base_dn
= req
->op
.del
.dn
;
579 return LDB_ERR_OPERATIONS_ERROR
;
582 ac
= linked_attributes_init(module
, req
);
584 return LDB_ERR_OPERATIONS_ERROR
;
588 /* without schema, this doesn't make any sense */
589 return ldb_next_request(module
, req
);
592 werr
= dsdb_linked_attribute_lDAPDisplayName_list(ac
->schema
, ac
, &attrs
);
593 if (!W_ERROR_IS_OK(werr
)) {
594 return LDB_ERR_OPERATIONS_ERROR
;
597 ret
= ldb_build_search_req(&search_req
, module
->ldb
, req
,
598 base_dn
, LDB_SCOPE_BASE
,
599 "(objectClass=*)", attrs
,
601 ac
, la_op_search_callback
,
604 if (ret
!= LDB_SUCCESS
) {
608 talloc_steal(search_req
, attrs
);
610 return ldb_next_request(module
, search_req
);
613 static int la_op_search_callback(struct ldb_request
*req
,
614 struct ldb_reply
*ares
)
616 struct la_context
*ac
;
617 const struct dsdb_attribute
*schema_attr
;
618 const struct dsdb_attribute
*target_attr
;
619 const struct ldb_message_element
*el
;
620 const char *attr_name
;
626 ac
= talloc_get_type(req
->context
, struct la_context
);
629 return ldb_module_done(ac
->req
, NULL
, NULL
,
630 LDB_ERR_OPERATIONS_ERROR
);
632 if (ares
->error
!= LDB_SUCCESS
) {
633 return ldb_module_done(ac
->req
, ares
->controls
,
634 ares
->response
, ares
->error
);
637 /* Only entries are interesting, and we only want the olddn */
638 switch (ares
->type
) {
639 case LDB_REPLY_ENTRY
:
640 ret
= ldb_dn_compare(ares
->message
->dn
, req
->op
.search
.base
);
642 /* Guh? We only asked for this DN */
644 return ldb_module_done(ac
->req
, NULL
, NULL
,
645 LDB_ERR_OPERATIONS_ERROR
);
647 if (ares
->message
->num_elements
== 0) {
648 /* only bother at all if there were some
649 * linked attributes found */
654 switch (ac
->req
->operation
) {
656 deldn
= ldb_dn_get_linearized(ac
->req
->op
.del
.dn
);
660 deldn
= ldb_dn_get_linearized(ac
->req
->op
.rename
.olddn
);
661 adddn
= ldb_dn_get_linearized(ac
->req
->op
.rename
.newdn
);
665 return ldb_module_done(ac
->req
, NULL
, NULL
,
666 LDB_ERR_OPERATIONS_ERROR
);
669 for (i
= 0; i
< ares
->message
->num_elements
; i
++) {
670 el
= &ares
->message
->elements
[i
];
672 schema_attr
= dsdb_attribute_by_lDAPDisplayName(ac
->schema
, el
->name
);
674 ldb_asprintf_errstring(ac
->module
->ldb
,
675 "attribute %s is not a valid attribute"
676 " in schema", el
->name
);
678 return ldb_module_done(ac
->req
, NULL
, NULL
,
679 LDB_ERR_OBJECT_CLASS_VIOLATION
);
682 /* Valid attribute, now find out if it is linked */
683 if (schema_attr
->linkID
== 0) {
684 /* Not a linked attribute, skip */
688 if ((schema_attr
->linkID
& 1) == 0) {
689 /* Odd is for the target. */
690 target_attr
= dsdb_attribute_by_linkID(ac
->schema
, schema_attr
->linkID
+ 1);
694 attr_name
= target_attr
->lDAPDisplayName
;
696 target_attr
= dsdb_attribute_by_linkID(ac
->schema
, schema_attr
->linkID
- 1);
700 attr_name
= target_attr
->lDAPDisplayName
;
702 for (j
= 0; j
< el
->num_values
; j
++) {
703 ret
= la_store_op(ac
, LA_OP_DEL
,
704 (char *)el
->values
[j
].data
,
706 if (ret
!= LDB_SUCCESS
) {
708 return ldb_module_done(ac
->req
,
711 if (!adddn
) continue;
712 ret
= la_store_op(ac
, LA_OP_ADD
,
713 (char *)el
->values
[j
].data
,
715 if (ret
!= LDB_SUCCESS
) {
717 return ldb_module_done(ac
->req
,
725 case LDB_REPLY_REFERRAL
:
734 /* start the mod requests chain */
735 ret
= la_do_mod_request(ac
);
737 ret
= la_down_req(ac
);
739 if (ret
!= LDB_SUCCESS
) {
740 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
749 /* do a linked attributes modify request */
750 static int la_do_mod_request(struct la_context
*ac
)
752 struct ldb_message_element
*ret_el
;
753 struct ldb_request
*mod_req
;
754 struct ldb_message
*new_msg
;
755 struct ldb_context
*ldb
;
758 ldb
= ac
->module
->ldb
;
760 /* Create the modify request */
761 new_msg
= ldb_msg_new(ac
);
764 return LDB_ERR_OPERATIONS_ERROR
;
766 new_msg
->dn
= ldb_dn_copy(new_msg
, ac
->ops
->dn
);
768 return LDB_ERR_OPERATIONS_ERROR
;
771 if (ac
->ops
->op
== LA_OP_ADD
) {
772 ret
= ldb_msg_add_empty(new_msg
, ac
->ops
->name
,
773 LDB_FLAG_MOD_ADD
, &ret_el
);
775 ret
= ldb_msg_add_empty(new_msg
, ac
->ops
->name
,
776 LDB_FLAG_MOD_DELETE
, &ret_el
);
778 if (ret
!= LDB_SUCCESS
) {
781 ret_el
->values
= talloc_array(new_msg
, struct ldb_val
, 1);
782 if (!ret_el
->values
) {
784 return LDB_ERR_OPERATIONS_ERROR
;
786 ret_el
->values
[0] = data_blob_string_const(ac
->ops
->value
);
787 ret_el
->num_values
= 1;
789 /* use ac->ops as the mem_ctx so that the request will be freed
790 * in the callback as soon as completed */
791 ret
= ldb_build_mod_req(&mod_req
, ldb
, ac
->ops
,
796 if (ret
!= LDB_SUCCESS
) {
799 talloc_steal(mod_req
, new_msg
);
801 /* Run the new request */
802 return ldb_next_request(ac
->module
, mod_req
);
805 static int la_mod_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
807 struct la_context
*ac
;
808 struct la_op_store
*os
;
811 ac
= talloc_get_type(req
->context
, struct la_context
);
814 return ldb_module_done(ac
->req
, NULL
, NULL
,
815 LDB_ERR_OPERATIONS_ERROR
);
817 if (ares
->error
!= LDB_SUCCESS
) {
818 return ldb_module_done(ac
->req
, ares
->controls
,
819 ares
->response
, ares
->error
);
822 if (ares
->type
!= LDB_REPLY_DONE
) {
823 ldb_set_errstring(ac
->module
->ldb
,
824 "invalid ldb_reply_type in callback");
826 return ldb_module_done(ac
->req
, NULL
, NULL
,
827 LDB_ERR_OPERATIONS_ERROR
);
836 /* this frees the request too
837 * DO NOT access 'req' after this point */
841 /* as last op run the original request */
843 ret
= la_do_mod_request(ac
);
845 ret
= la_down_req(ac
);
848 if (ret
!= LDB_SUCCESS
) {
849 return ldb_module_done(ac
->req
, NULL
, NULL
, ret
);
854 static int la_down_req(struct la_context
*ac
)
856 struct ldb_request
*down_req
;
859 switch (ac
->req
->operation
) {
861 ret
= ldb_build_add_req(&down_req
, ac
->module
->ldb
, ac
,
862 ac
->req
->op
.add
.message
,
864 ac
, la_down_callback
,
868 ret
= ldb_build_mod_req(&down_req
, ac
->module
->ldb
, ac
,
869 ac
->req
->op
.mod
.message
,
871 ac
, la_down_callback
,
875 ret
= ldb_build_del_req(&down_req
, ac
->module
->ldb
, ac
,
878 ac
, la_down_callback
,
882 ret
= ldb_build_rename_req(&down_req
, ac
->module
->ldb
, ac
,
883 ac
->req
->op
.rename
.olddn
,
884 ac
->req
->op
.rename
.newdn
,
886 ac
, la_down_callback
,
890 ret
= LDB_ERR_OPERATIONS_ERROR
;
892 if (ret
!= LDB_SUCCESS
) {
896 return ldb_next_request(ac
->module
, down_req
);
899 static int la_down_callback(struct ldb_request
*req
, struct ldb_reply
*ares
)
901 struct la_context
*ac
;
903 ac
= talloc_get_type(req
->context
, struct la_context
);
906 return ldb_module_done(ac
->req
, NULL
, NULL
,
907 LDB_ERR_OPERATIONS_ERROR
);
909 if (ares
->error
!= LDB_SUCCESS
) {
910 return ldb_module_done(ac
->req
, ares
->controls
,
911 ares
->response
, ares
->error
);
914 if (ares
->type
!= LDB_REPLY_DONE
) {
915 ldb_set_errstring(ac
->module
->ldb
,
916 "invalid ldb_reply_type in callback");
918 return ldb_module_done(ac
->req
, NULL
, NULL
,
919 LDB_ERR_OPERATIONS_ERROR
);
922 return ldb_module_done(ac
->req
, ares
->controls
,
923 ares
->response
, ares
->error
);
926 _PUBLIC_
const struct ldb_module_ops ldb_linked_attributes_module_ops
= {
927 .name
= "linked_attributes",
928 .add
= linked_attributes_add
,
929 .modify
= linked_attributes_modify
,
930 .del
= linked_attributes_op
,
931 .rename
= linked_attributes_op
,