2 Unix SMB/CIFS implementation.
3 Database interface wrapper around ctdbd
4 Copyright (C) Volker Lendecke 2007-2009
5 Copyright (C) Michael Adam 2009
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/>.
22 #include "system/filesys.h"
23 #include "lib/tdb_wrap/tdb_wrap.h"
25 #include "dbwrap/dbwrap.h"
26 #include "dbwrap/dbwrap_ctdb.h"
27 #include "dbwrap/dbwrap_rbt.h"
28 #include "lib/param/param.h"
30 #ifdef CLUSTER_SUPPORT
33 * It is not possible to include ctdb.h and tdb_compat.h (included via
34 * some other include above) without warnings. This fixes those
42 #ifdef typesafe_cb_preargs
43 #undef typesafe_cb_preargs
46 #ifdef typesafe_cb_postargs
47 #undef typesafe_cb_postargs
51 #include "ctdb_private.h"
52 #include "ctdbd_conn.h"
53 #include "dbwrap/dbwrap.h"
54 #include "dbwrap/dbwrap_private.h"
55 #include "dbwrap/dbwrap_ctdb.h"
59 struct db_ctdb_transaction_handle
{
60 struct db_ctdb_ctx
*ctx
;
62 * we store the writes done under a transaction:
64 struct ctdb_marshall_buffer
*m_write
;
71 struct db_context
*db
;
72 struct tdb_wrap
*wtdb
;
74 struct db_ctdb_transaction_handle
*transaction
;
75 struct g_lock_ctx
*lock_ctx
;
79 struct db_ctdb_ctx
*ctdb_ctx
;
80 struct ctdb_ltdb_header header
;
81 struct timeval lock_time
;
84 static NTSTATUS
tdb_error_to_ntstatus(struct tdb_context
*tdb
)
86 enum TDB_ERROR tret
= tdb_error(tdb
);
88 return map_nt_error_from_tdb(tret
);
91 struct db_ctdb_ltdb_parse_state
{
92 void (*parser
)(TDB_DATA key
, struct ctdb_ltdb_header
*header
,
93 TDB_DATA data
, void *private_data
);
97 static int db_ctdb_ltdb_parser(TDB_DATA key
, TDB_DATA data
,
100 struct db_ctdb_ltdb_parse_state
*state
=
101 (struct db_ctdb_ltdb_parse_state
*)private_data
;
103 if (data
.dsize
< sizeof(struct ctdb_ltdb_header
)) {
107 key
, (struct ctdb_ltdb_header
*)data
.dptr
,
108 make_tdb_data(data
.dptr
+ sizeof(struct ctdb_ltdb_header
),
109 data
.dsize
- sizeof(struct ctdb_ltdb_header
)),
110 state
->private_data
);
114 static NTSTATUS
db_ctdb_ltdb_parse(
115 struct db_ctdb_ctx
*db
, TDB_DATA key
,
116 void (*parser
)(TDB_DATA key
, struct ctdb_ltdb_header
*header
,
117 TDB_DATA data
, void *private_data
),
120 struct db_ctdb_ltdb_parse_state state
;
123 state
.parser
= parser
;
124 state
.private_data
= private_data
;
126 ret
= tdb_parse_record(db
->wtdb
->tdb
, key
, db_ctdb_ltdb_parser
,
129 return NT_STATUS_NOT_FOUND
;
135 * Store a record together with the ctdb record header
136 * in the local copy of the database.
138 static NTSTATUS
db_ctdb_ltdb_store(struct db_ctdb_ctx
*db
,
140 struct ctdb_ltdb_header
*header
,
143 TALLOC_CTX
*tmp_ctx
= talloc_stackframe();
147 rec
.dsize
= data
.dsize
+ sizeof(struct ctdb_ltdb_header
);
148 rec
.dptr
= (uint8_t *)talloc_size(tmp_ctx
, rec
.dsize
);
150 if (rec
.dptr
== NULL
) {
151 talloc_free(tmp_ctx
);
152 return NT_STATUS_NO_MEMORY
;
155 memcpy(rec
.dptr
, header
, sizeof(struct ctdb_ltdb_header
));
156 memcpy(sizeof(struct ctdb_ltdb_header
) + (uint8_t *)rec
.dptr
, data
.dptr
, data
.dsize
);
158 ret
= tdb_store(db
->wtdb
->tdb
, key
, rec
, TDB_REPLACE
);
160 talloc_free(tmp_ctx
);
162 return (ret
== 0) ? NT_STATUS_OK
163 : tdb_error_to_ntstatus(db
->wtdb
->tdb
);
168 form a ctdb_rec_data record from a key/data pair
170 static struct ctdb_rec_data
*db_ctdb_marshall_record(TALLOC_CTX
*mem_ctx
, uint32_t reqid
,
172 struct ctdb_ltdb_header
*header
,
176 struct ctdb_rec_data
*d
;
178 length
= offsetof(struct ctdb_rec_data
, data
) + key
.dsize
+
179 data
.dsize
+ sizeof(*header
);
180 d
= (struct ctdb_rec_data
*)talloc_size(mem_ctx
, length
);
186 d
->keylen
= key
.dsize
;
187 memcpy(&d
->data
[0], key
.dptr
, key
.dsize
);
189 d
->datalen
= data
.dsize
+ sizeof(*header
);
190 memcpy(&d
->data
[key
.dsize
], header
, sizeof(*header
));
191 memcpy(&d
->data
[key
.dsize
+sizeof(*header
)], data
.dptr
, data
.dsize
);
196 /* helper function for marshalling multiple records */
197 static struct ctdb_marshall_buffer
*db_ctdb_marshall_add(TALLOC_CTX
*mem_ctx
,
198 struct ctdb_marshall_buffer
*m
,
202 struct ctdb_ltdb_header
*header
,
205 struct ctdb_rec_data
*r
;
206 size_t m_size
, r_size
;
207 struct ctdb_marshall_buffer
*m2
= NULL
;
209 r
= db_ctdb_marshall_record(talloc_tos(), reqid
, key
, header
, data
);
216 m
= (struct ctdb_marshall_buffer
*)talloc_zero_size(
217 mem_ctx
, offsetof(struct ctdb_marshall_buffer
, data
));
224 m_size
= talloc_get_size(m
);
225 r_size
= talloc_get_size(r
);
227 m2
= (struct ctdb_marshall_buffer
*)talloc_realloc_size(
228 mem_ctx
, m
, m_size
+ r_size
);
234 memcpy(m_size
+ (uint8_t *)m2
, r
, r_size
);
243 /* we've finished marshalling, return a data blob with the marshalled records */
244 static TDB_DATA
db_ctdb_marshall_finish(struct ctdb_marshall_buffer
*m
)
247 data
.dptr
= (uint8_t *)m
;
248 data
.dsize
= talloc_get_size(m
);
253 loop over a marshalling buffer
255 - pass r==NULL to start
256 - loop the number of times indicated by m->count
258 static struct ctdb_rec_data
*db_ctdb_marshall_loop_next_key(
259 struct ctdb_marshall_buffer
*m
, struct ctdb_rec_data
*r
, TDB_DATA
*key
)
262 r
= (struct ctdb_rec_data
*)&m
->data
[0];
264 r
= (struct ctdb_rec_data
*)(r
->length
+ (uint8_t *)r
);
267 key
->dptr
= &r
->data
[0];
268 key
->dsize
= r
->keylen
;
272 static bool db_ctdb_marshall_buf_parse(
273 struct ctdb_rec_data
*r
, uint32_t *reqid
,
274 struct ctdb_ltdb_header
**header
, TDB_DATA
*data
)
276 if (r
->datalen
< sizeof(struct ctdb_ltdb_header
)) {
282 data
->dptr
= &r
->data
[r
->keylen
] + sizeof(struct ctdb_ltdb_header
);
283 data
->dsize
= r
->datalen
- sizeof(struct ctdb_ltdb_header
);
285 *header
= (struct ctdb_ltdb_header
*)&r
->data
[r
->keylen
];
291 * CTDB transaction destructor
293 static int db_ctdb_transaction_destructor(struct db_ctdb_transaction_handle
*h
)
297 status
= g_lock_unlock(h
->ctx
->lock_ctx
, h
->lock_name
);
298 if (!NT_STATUS_IS_OK(status
)) {
299 DEBUG(0, ("g_lock_unlock failed for %s: %s\n", h
->lock_name
,
307 * CTDB dbwrap API: transaction_start function
308 * starts a transaction on a persistent database
310 static int db_ctdb_transaction_start(struct db_context
*db
)
312 struct db_ctdb_transaction_handle
*h
;
314 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
317 if (!db
->persistent
) {
318 DEBUG(0,("transactions not supported on non-persistent database 0x%08x\n",
323 if (ctx
->transaction
) {
324 ctx
->transaction
->nesting
++;
325 DEBUG(5, (__location__
" transaction start on db 0x%08x: nesting %d -> %d\n",
326 ctx
->db_id
, ctx
->transaction
->nesting
- 1, ctx
->transaction
->nesting
));
330 h
= talloc_zero(db
, struct db_ctdb_transaction_handle
);
332 DEBUG(0,(__location__
" oom for transaction handle\n"));
338 h
->lock_name
= talloc_asprintf(h
, "transaction_db_0x%08x",
339 (unsigned int)ctx
->db_id
);
340 if (h
->lock_name
== NULL
) {
341 DEBUG(0, ("talloc_asprintf failed\n"));
347 * Wait a day, i.e. forever...
349 status
= g_lock_lock(ctx
->lock_ctx
, h
->lock_name
, G_LOCK_WRITE
,
350 timeval_set(86400, 0));
351 if (!NT_STATUS_IS_OK(status
)) {
352 DEBUG(0, ("g_lock_lock failed: %s\n", nt_errstr(status
)));
357 talloc_set_destructor(h
, db_ctdb_transaction_destructor
);
359 ctx
->transaction
= h
;
361 DEBUG(5,(__location__
" transaction started on db 0x%08x\n", ctx
->db_id
));
366 static bool parse_newest_in_marshall_buffer(
367 struct ctdb_marshall_buffer
*buf
, TDB_DATA key
,
368 void (*parser
)(TDB_DATA key
, struct ctdb_ltdb_header
*header
,
369 TDB_DATA data
, void *private_data
),
372 struct ctdb_rec_data
*rec
= NULL
;
373 struct ctdb_ltdb_header
*h
= NULL
;
382 * Walk the list of records written during this
383 * transaction. If we want to read one we have already
384 * written, return the last written sample. Thus we do not do
385 * a "break;" for the first hit, this record might have been
389 for (i
=0; i
<buf
->count
; i
++) {
393 rec
= db_ctdb_marshall_loop_next_key(buf
, rec
, &tkey
);
398 if (!tdb_data_equal(key
, tkey
)) {
402 if (!db_ctdb_marshall_buf_parse(rec
, &reqid
, &h
, &data
)) {
411 parser(key
, h
, data
, private_data
);
416 struct pull_newest_from_marshall_buffer_state
{
417 struct ctdb_ltdb_header
*pheader
;
422 static void pull_newest_from_marshall_buffer_parser(
423 TDB_DATA key
, struct ctdb_ltdb_header
*header
,
424 TDB_DATA data
, void *private_data
)
426 struct pull_newest_from_marshall_buffer_state
*state
=
427 (struct pull_newest_from_marshall_buffer_state
*)private_data
;
429 if (state
->pheader
!= NULL
) {
430 memcpy(state
->pheader
, header
, sizeof(*state
->pheader
));
432 if (state
->pdata
!= NULL
) {
433 state
->pdata
->dsize
= data
.dsize
;
434 state
->pdata
->dptr
= (uint8_t *)talloc_memdup(
435 state
->mem_ctx
, data
.dptr
, data
.dsize
);
439 static bool pull_newest_from_marshall_buffer(struct ctdb_marshall_buffer
*buf
,
441 struct ctdb_ltdb_header
*pheader
,
445 struct pull_newest_from_marshall_buffer_state state
;
447 state
.pheader
= pheader
;
448 state
.mem_ctx
= mem_ctx
;
451 if (!parse_newest_in_marshall_buffer(
452 buf
, key
, pull_newest_from_marshall_buffer_parser
,
456 if ((pdata
!= NULL
) && (pdata
->dsize
!= 0) && (pdata
->dptr
== NULL
)) {
463 static NTSTATUS
db_ctdb_store_transaction(struct db_record
*rec
, TDB_DATA data
, int flag
);
464 static NTSTATUS
db_ctdb_delete_transaction(struct db_record
*rec
);
466 static struct db_record
*db_ctdb_fetch_locked_transaction(struct db_ctdb_ctx
*ctx
,
470 struct db_record
*result
;
473 if (!(result
= talloc(mem_ctx
, struct db_record
))) {
474 DEBUG(0, ("talloc failed\n"));
478 result
->db
= ctx
->db
;
479 result
->private_data
= ctx
->transaction
;
481 result
->key
.dsize
= key
.dsize
;
482 result
->key
.dptr
= (uint8_t *)talloc_memdup(result
, key
.dptr
,
484 if (result
->key
.dptr
== NULL
) {
485 DEBUG(0, ("talloc failed\n"));
490 result
->store
= db_ctdb_store_transaction
;
491 result
->delete_rec
= db_ctdb_delete_transaction
;
493 if (pull_newest_from_marshall_buffer(ctx
->transaction
->m_write
, key
,
494 NULL
, result
, &result
->value
)) {
498 ctdb_data
= tdb_fetch_compat(ctx
->wtdb
->tdb
, key
);
499 if (ctdb_data
.dptr
== NULL
) {
500 /* create the record */
501 result
->value
= tdb_null
;
505 result
->value
.dsize
= ctdb_data
.dsize
- sizeof(struct ctdb_ltdb_header
);
506 result
->value
.dptr
= NULL
;
508 if ((result
->value
.dsize
!= 0)
509 && !(result
->value
.dptr
= (uint8_t *)talloc_memdup(
510 result
, ctdb_data
.dptr
+ sizeof(struct ctdb_ltdb_header
),
511 result
->value
.dsize
))) {
512 DEBUG(0, ("talloc failed\n"));
516 SAFE_FREE(ctdb_data
.dptr
);
521 static int db_ctdb_record_destructor(struct db_record
**recp
)
523 struct db_record
*rec
= talloc_get_type_abort(*recp
, struct db_record
);
524 struct db_ctdb_transaction_handle
*h
= talloc_get_type_abort(
525 rec
->private_data
, struct db_ctdb_transaction_handle
);
526 int ret
= h
->ctx
->db
->transaction_commit(h
->ctx
->db
);
528 DEBUG(0,(__location__
" transaction_commit failed\n"));
534 auto-create a transaction for persistent databases
536 static struct db_record
*db_ctdb_fetch_locked_persistent(struct db_ctdb_ctx
*ctx
,
541 struct db_record
*rec
, **recp
;
543 res
= db_ctdb_transaction_start(ctx
->db
);
548 rec
= db_ctdb_fetch_locked_transaction(ctx
, mem_ctx
, key
);
550 ctx
->db
->transaction_cancel(ctx
->db
);
554 /* destroy this transaction when we release the lock */
555 recp
= talloc(rec
, struct db_record
*);
557 ctx
->db
->transaction_cancel(ctx
->db
);
562 talloc_set_destructor(recp
, db_ctdb_record_destructor
);
568 stores a record inside a transaction
570 static NTSTATUS
db_ctdb_transaction_store(struct db_ctdb_transaction_handle
*h
,
571 TDB_DATA key
, TDB_DATA data
)
573 TALLOC_CTX
*tmp_ctx
= talloc_new(h
);
575 struct ctdb_ltdb_header header
;
579 /* we need the header so we can update the RSN */
581 if (!pull_newest_from_marshall_buffer(h
->m_write
, key
, &header
,
584 rec
= tdb_fetch_compat(h
->ctx
->wtdb
->tdb
, key
);
586 if (rec
.dptr
!= NULL
) {
587 memcpy(&header
, rec
.dptr
,
588 sizeof(struct ctdb_ltdb_header
));
589 rec
.dsize
-= sizeof(struct ctdb_ltdb_header
);
592 * a special case, we are writing the same
593 * data that is there now
595 if (data
.dsize
== rec
.dsize
&&
597 rec
.dptr
+ sizeof(struct ctdb_ltdb_header
),
600 talloc_free(tmp_ctx
);
607 header
.dmaster
= get_my_vnn();
610 h
->m_write
= db_ctdb_marshall_add(h
, h
->m_write
, h
->ctx
->db_id
, 0, key
, &header
, data
);
611 if (h
->m_write
== NULL
) {
612 DEBUG(0,(__location__
" Failed to add to marshalling record\n"));
613 talloc_free(tmp_ctx
);
614 return NT_STATUS_NO_MEMORY
;
617 talloc_free(tmp_ctx
);
623 a record store inside a transaction
625 static NTSTATUS
db_ctdb_store_transaction(struct db_record
*rec
, TDB_DATA data
, int flag
)
627 struct db_ctdb_transaction_handle
*h
= talloc_get_type_abort(
628 rec
->private_data
, struct db_ctdb_transaction_handle
);
631 status
= db_ctdb_transaction_store(h
, rec
->key
, data
);
636 a record delete inside a transaction
638 static NTSTATUS
db_ctdb_delete_transaction(struct db_record
*rec
)
640 struct db_ctdb_transaction_handle
*h
= talloc_get_type_abort(
641 rec
->private_data
, struct db_ctdb_transaction_handle
);
644 status
= db_ctdb_transaction_store(h
, rec
->key
, tdb_null
);
648 static void db_ctdb_fetch_db_seqnum_parser(
649 TDB_DATA key
, struct ctdb_ltdb_header
*header
,
650 TDB_DATA data
, void *private_data
)
652 uint64_t *seqnum
= (uint64_t *)private_data
;
654 if (data
.dsize
!= sizeof(uint64_t)) {
658 memcpy(seqnum
, data
.dptr
, sizeof(*seqnum
));
662 * Fetch the db sequence number of a persistent db directly from the db.
664 static NTSTATUS
db_ctdb_fetch_db_seqnum_from_db(struct db_ctdb_ctx
*db
,
670 if (seqnum
== NULL
) {
671 return NT_STATUS_INVALID_PARAMETER
;
674 key
= string_term_tdb_data(CTDB_DB_SEQNUM_KEY
);
676 status
= db_ctdb_ltdb_parse(
677 db
, key
, db_ctdb_fetch_db_seqnum_parser
, seqnum
);
679 if (NT_STATUS_IS_OK(status
)) {
682 if (NT_STATUS_EQUAL(status
, NT_STATUS_NOT_FOUND
)) {
690 * Store the database sequence number inside a transaction.
692 static NTSTATUS
db_ctdb_store_db_seqnum(struct db_ctdb_transaction_handle
*h
,
696 const char *keyname
= CTDB_DB_SEQNUM_KEY
;
700 key
= string_term_tdb_data(keyname
);
702 data
.dptr
= (uint8_t *)&seqnum
;
703 data
.dsize
= sizeof(uint64_t);
705 status
= db_ctdb_transaction_store(h
, key
, data
);
713 static int db_ctdb_transaction_commit(struct db_context
*db
)
715 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
719 struct db_ctdb_transaction_handle
*h
= ctx
->transaction
;
720 uint64_t old_seqnum
, new_seqnum
;
724 DEBUG(0,(__location__
" transaction commit with no open transaction on db 0x%08x\n", ctx
->db_id
));
728 if (h
->nested_cancel
) {
729 db
->transaction_cancel(db
);
730 DEBUG(5,(__location__
" Failed transaction commit after nested cancel\n"));
734 if (h
->nesting
!= 0) {
736 DEBUG(5, (__location__
" transaction commit on db 0x%08x: nesting %d -> %d\n",
737 ctx
->db_id
, ctx
->transaction
->nesting
+ 1, ctx
->transaction
->nesting
));
741 if (h
->m_write
== NULL
) {
743 * No changes were made, so don't change the seqnum,
744 * don't push to other node, just exit with success.
750 DEBUG(5,(__location__
" transaction commit on db 0x%08x\n", ctx
->db_id
));
753 * As the last db action before committing, bump the database sequence
754 * number. Note that this undoes all changes to the seqnum records
755 * performed under the transaction. This record is not meant to be
756 * modified by user interaction. It is for internal use only...
758 rets
= db_ctdb_fetch_db_seqnum_from_db(ctx
, &old_seqnum
);
759 if (!NT_STATUS_IS_OK(rets
)) {
760 DEBUG(1, (__location__
" failed to fetch the db sequence number "
761 "in transaction commit on db 0x%08x\n", ctx
->db_id
));
766 new_seqnum
= old_seqnum
+ 1;
768 rets
= db_ctdb_store_db_seqnum(h
, new_seqnum
);
769 if (!NT_STATUS_IS_OK(rets
)) {
770 DEBUG(1, (__location__
"failed to store the db sequence number "
771 " in transaction commit on db 0x%08x\n", ctx
->db_id
));
777 /* tell ctdbd to commit to the other nodes */
778 rets
= ctdbd_control_local(messaging_ctdbd_connection(),
779 CTDB_CONTROL_TRANS3_COMMIT
,
781 db_ctdb_marshall_finish(h
->m_write
),
782 NULL
, NULL
, &status
);
783 if (!NT_STATUS_IS_OK(rets
) || status
!= 0) {
785 * The TRANS3_COMMIT control should only possibly fail when a
786 * recovery has been running concurrently. In any case, the db
787 * will be the same on all nodes, either the new copy or the
788 * old copy. This can be detected by comparing the old and new
789 * local sequence numbers.
791 rets
= db_ctdb_fetch_db_seqnum_from_db(ctx
, &new_seqnum
);
792 if (!NT_STATUS_IS_OK(rets
)) {
793 DEBUG(1, (__location__
" failed to refetch db sequence "
794 "number after failed TRANS3_COMMIT\n"));
799 if (new_seqnum
== old_seqnum
) {
800 /* Recovery prevented all our changes: retry. */
803 if (new_seqnum
!= (old_seqnum
+ 1)) {
804 DEBUG(0, (__location__
" ERROR: new_seqnum[%lu] != "
805 "old_seqnum[%lu] + (0 or 1) after failed "
806 "TRANS3_COMMIT - this should not happen!\n",
807 (unsigned long)new_seqnum
,
808 (unsigned long)old_seqnum
));
813 * Recovery propagated our changes to all nodes, completing
814 * our commit for us - succeed.
821 h
->ctx
->transaction
= NULL
;
830 static int db_ctdb_transaction_cancel(struct db_context
*db
)
832 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
834 struct db_ctdb_transaction_handle
*h
= ctx
->transaction
;
837 DEBUG(0,(__location__
" transaction cancel with no open transaction on db 0x%08x\n", ctx
->db_id
));
841 if (h
->nesting
!= 0) {
843 h
->nested_cancel
= true;
844 DEBUG(5, (__location__
" transaction cancel on db 0x%08x: nesting %d -> %d\n",
845 ctx
->db_id
, ctx
->transaction
->nesting
+ 1, ctx
->transaction
->nesting
));
849 DEBUG(5,(__location__
" Cancel transaction on db 0x%08x\n", ctx
->db_id
));
851 ctx
->transaction
= NULL
;
857 static NTSTATUS
db_ctdb_store(struct db_record
*rec
, TDB_DATA data
, int flag
)
859 struct db_ctdb_rec
*crec
= talloc_get_type_abort(
860 rec
->private_data
, struct db_ctdb_rec
);
862 return db_ctdb_ltdb_store(crec
->ctdb_ctx
, rec
->key
, &(crec
->header
), data
);
867 #ifdef HAVE_CTDB_CONTROL_SCHEDULE_FOR_DELETION_DECL
868 static NTSTATUS
db_ctdb_send_schedule_for_deletion(struct db_record
*rec
)
871 struct ctdb_control_schedule_for_deletion
*dd
;
874 struct db_ctdb_rec
*crec
= talloc_get_type_abort(
875 rec
->private_data
, struct db_ctdb_rec
);
877 indata
.dsize
= offsetof(struct ctdb_control_schedule_for_deletion
, key
) + rec
->key
.dsize
;
878 indata
.dptr
= talloc_zero_array(crec
, uint8_t, indata
.dsize
);
879 if (indata
.dptr
== NULL
) {
880 DEBUG(0, (__location__
" talloc failed!\n"));
881 return NT_STATUS_NO_MEMORY
;
884 dd
= (struct ctdb_control_schedule_for_deletion
*)(void *)indata
.dptr
;
885 dd
->db_id
= crec
->ctdb_ctx
->db_id
;
886 dd
->hdr
= crec
->header
;
887 dd
->keylen
= rec
->key
.dsize
;
888 memcpy(dd
->key
, rec
->key
.dptr
, rec
->key
.dsize
);
890 status
= ctdbd_control_local(messaging_ctdbd_connection(),
891 CTDB_CONTROL_SCHEDULE_FOR_DELETION
,
892 crec
->ctdb_ctx
->db_id
,
893 CTDB_CTRL_FLAG_NOREPLY
, /* flags */
898 talloc_free(indata
.dptr
);
900 if (!NT_STATUS_IS_OK(status
) || cstatus
!= 0) {
901 DEBUG(1, (__location__
" Error sending local control "
902 "SCHEDULE_FOR_DELETION: %s, cstatus = %d\n",
903 nt_errstr(status
), cstatus
));
904 if (NT_STATUS_IS_OK(status
)) {
905 status
= NT_STATUS_UNSUCCESSFUL
;
913 static NTSTATUS
db_ctdb_delete(struct db_record
*rec
)
919 * We have to store the header with empty data. TODO: Fix the
925 status
= db_ctdb_store(rec
, data
, 0);
926 if (!NT_STATUS_IS_OK(status
)) {
930 #ifdef HAVE_CTDB_CONTROL_SCHEDULE_FOR_DELETION_DECL
931 status
= db_ctdb_send_schedule_for_deletion(rec
);
937 static int db_ctdb_record_destr(struct db_record
* data
)
939 struct db_ctdb_rec
*crec
= talloc_get_type_abort(
940 data
->private_data
, struct db_ctdb_rec
);
943 DEBUG(10, (DEBUGLEVEL
> 10
944 ? "Unlocking db %u key %s\n"
945 : "Unlocking db %u key %.20s\n",
946 (int)crec
->ctdb_ctx
->db_id
,
947 hex_encode_talloc(data
, (unsigned char *)data
->key
.dptr
,
950 tdb_chainunlock(crec
->ctdb_ctx
->wtdb
->tdb
, data
->key
);
952 threshold
= lp_ctdb_locktime_warn_threshold();
953 if (threshold
!= 0) {
954 double timediff
= timeval_elapsed(&crec
->lock_time
);
955 if ((timediff
* 1000) > threshold
) {
958 key
= hex_encode_talloc(data
,
959 (unsigned char *)data
->key
.dptr
,
961 DEBUG(0, ("Held tdb lock on db %s, key %s %f seconds\n",
962 tdb_name(crec
->ctdb_ctx
->wtdb
->tdb
), key
,
971 * Check whether we have a valid local copy of the given record,
972 * either for reading or for writing.
974 static bool db_ctdb_can_use_local_hdr(const struct ctdb_ltdb_header
*hdr
,
977 #ifdef HAVE_CTDB_WANT_READONLY_DECL
978 if (hdr
->dmaster
!= get_my_vnn()) {
979 /* If we're not dmaster, it must be r/o copy. */
980 return read_only
&& (hdr
->flags
& CTDB_REC_RO_HAVE_READONLY
);
984 * If we want write access, no one may have r/o copies.
986 return read_only
|| !(hdr
->flags
& CTDB_REC_RO_HAVE_DELEGATIONS
);
988 return (hdr
->dmaster
== get_my_vnn());
992 static bool db_ctdb_can_use_local_copy(TDB_DATA ctdb_data
, bool read_only
)
994 if (ctdb_data
.dptr
== NULL
)
997 if (ctdb_data
.dsize
< sizeof(struct ctdb_ltdb_header
))
1000 return db_ctdb_can_use_local_hdr(
1001 (struct ctdb_ltdb_header
*)ctdb_data
.dptr
, read_only
);
1004 static struct db_record
*fetch_locked_internal(struct db_ctdb_ctx
*ctx
,
1005 TALLOC_CTX
*mem_ctx
,
1009 struct db_record
*result
;
1010 struct db_ctdb_rec
*crec
;
1013 int migrate_attempts
= 0;
1016 if (!(result
= talloc(mem_ctx
, struct db_record
))) {
1017 DEBUG(0, ("talloc failed\n"));
1021 if (!(crec
= talloc_zero(result
, struct db_ctdb_rec
))) {
1022 DEBUG(0, ("talloc failed\n"));
1023 TALLOC_FREE(result
);
1027 result
->db
= ctx
->db
;
1028 result
->private_data
= (void *)crec
;
1029 crec
->ctdb_ctx
= ctx
;
1031 result
->key
.dsize
= key
.dsize
;
1032 result
->key
.dptr
= (uint8_t *)talloc_memdup(result
, key
.dptr
,
1034 if (result
->key
.dptr
== NULL
) {
1035 DEBUG(0, ("talloc failed\n"));
1036 TALLOC_FREE(result
);
1041 * Do a blocking lock on the record
1045 if (DEBUGLEVEL
>= 10) {
1046 char *keystr
= hex_encode_talloc(result
, key
.dptr
, key
.dsize
);
1047 DEBUG(10, (DEBUGLEVEL
> 10
1048 ? "Locking db %u key %s\n"
1049 : "Locking db %u key %.20s\n",
1050 (int)crec
->ctdb_ctx
->db_id
, keystr
));
1051 TALLOC_FREE(keystr
);
1055 ? tdb_chainlock_nonblock(ctx
->wtdb
->tdb
, key
)
1056 : tdb_chainlock(ctx
->wtdb
->tdb
, key
);
1058 DEBUG(3, ("tdb_chainlock failed\n"));
1059 TALLOC_FREE(result
);
1063 result
->store
= db_ctdb_store
;
1064 result
->delete_rec
= db_ctdb_delete
;
1065 talloc_set_destructor(result
, db_ctdb_record_destr
);
1067 ctdb_data
= tdb_fetch_compat(ctx
->wtdb
->tdb
, key
);
1070 * See if we have a valid record and we are the dmaster. If so, we can
1071 * take the shortcut and just return it.
1074 if (!db_ctdb_can_use_local_copy(ctdb_data
, false)) {
1075 SAFE_FREE(ctdb_data
.dptr
);
1076 tdb_chainunlock(ctx
->wtdb
->tdb
, key
);
1077 talloc_set_destructor(result
, NULL
);
1079 if (tryonly
&& (migrate_attempts
!= 0)) {
1080 DEBUG(5, ("record migrated away again\n"));
1081 TALLOC_FREE(result
);
1085 migrate_attempts
+= 1;
1087 DEBUG(10, ("ctdb_data.dptr = %p, dmaster = %u (%u) %u\n",
1088 ctdb_data
.dptr
, ctdb_data
.dptr
?
1089 ((struct ctdb_ltdb_header
*)ctdb_data
.dptr
)->dmaster
: -1,
1092 ((struct ctdb_ltdb_header
*)ctdb_data
.dptr
)->flags
: 0));
1094 status
= ctdbd_migrate(messaging_ctdbd_connection(), ctx
->db_id
,
1096 if (!NT_STATUS_IS_OK(status
)) {
1097 DEBUG(5, ("ctdb_migrate failed: %s\n",
1098 nt_errstr(status
)));
1099 TALLOC_FREE(result
);
1102 /* now its migrated, try again */
1106 if (migrate_attempts
> 10) {
1107 DEBUG(0, ("db_ctdb_fetch_locked for %s key %s needed %d "
1108 "attempts\n", tdb_name(ctx
->wtdb
->tdb
),
1109 hex_encode_talloc(talloc_tos(),
1110 (unsigned char *)key
.dptr
,
1115 GetTimeOfDay(&crec
->lock_time
);
1117 memcpy(&crec
->header
, ctdb_data
.dptr
, sizeof(crec
->header
));
1119 result
->value
.dsize
= ctdb_data
.dsize
- sizeof(crec
->header
);
1120 result
->value
.dptr
= NULL
;
1122 if ((result
->value
.dsize
!= 0)
1123 && !(result
->value
.dptr
= (uint8_t *)talloc_memdup(
1124 result
, ctdb_data
.dptr
+ sizeof(crec
->header
),
1125 result
->value
.dsize
))) {
1126 DEBUG(0, ("talloc failed\n"));
1127 TALLOC_FREE(result
);
1130 SAFE_FREE(ctdb_data
.dptr
);
1135 static struct db_record
*db_ctdb_fetch_locked(struct db_context
*db
,
1136 TALLOC_CTX
*mem_ctx
,
1139 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
1140 struct db_ctdb_ctx
);
1142 if (ctx
->transaction
!= NULL
) {
1143 return db_ctdb_fetch_locked_transaction(ctx
, mem_ctx
, key
);
1146 if (db
->persistent
) {
1147 return db_ctdb_fetch_locked_persistent(ctx
, mem_ctx
, key
);
1150 return fetch_locked_internal(ctx
, mem_ctx
, key
, false);
1153 static struct db_record
*db_ctdb_try_fetch_locked(struct db_context
*db
,
1154 TALLOC_CTX
*mem_ctx
,
1157 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
1158 struct db_ctdb_ctx
);
1160 if (ctx
->transaction
!= NULL
) {
1161 return db_ctdb_fetch_locked_transaction(ctx
, mem_ctx
, key
);
1164 if (db
->persistent
) {
1165 return db_ctdb_fetch_locked_persistent(ctx
, mem_ctx
, key
);
1168 return fetch_locked_internal(ctx
, mem_ctx
, key
, true);
1171 struct db_ctdb_parse_record_state
{
1172 void (*parser
)(TDB_DATA key
, TDB_DATA data
, void *private_data
);
1174 bool ask_for_readonly_copy
;
1178 static void db_ctdb_parse_record_parser(
1179 TDB_DATA key
, struct ctdb_ltdb_header
*header
,
1180 TDB_DATA data
, void *private_data
)
1182 struct db_ctdb_parse_record_state
*state
=
1183 (struct db_ctdb_parse_record_state
*)private_data
;
1184 state
->parser(key
, data
, state
->private_data
);
1187 static void db_ctdb_parse_record_parser_nonpersistent(
1188 TDB_DATA key
, struct ctdb_ltdb_header
*header
,
1189 TDB_DATA data
, void *private_data
)
1191 struct db_ctdb_parse_record_state
*state
=
1192 (struct db_ctdb_parse_record_state
*)private_data
;
1194 if (db_ctdb_can_use_local_hdr(header
, true)) {
1195 state
->parser(key
, data
, state
->private_data
);
1199 * We found something in the db, so it seems that this record,
1200 * while not usable locally right now, is popular. Ask for a
1203 state
->ask_for_readonly_copy
= true;
1207 static NTSTATUS
db_ctdb_parse_record(struct db_context
*db
, TDB_DATA key
,
1208 void (*parser
)(TDB_DATA key
,
1210 void *private_data
),
1213 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(
1214 db
->private_data
, struct db_ctdb_ctx
);
1215 struct db_ctdb_parse_record_state state
;
1219 state
.parser
= parser
;
1220 state
.private_data
= private_data
;
1222 if (ctx
->transaction
!= NULL
) {
1223 struct db_ctdb_transaction_handle
*h
= ctx
->transaction
;
1227 * Transactions only happen for persistent db's.
1230 found
= parse_newest_in_marshall_buffer(
1231 h
->m_write
, key
, db_ctdb_parse_record_parser
, &state
);
1234 return NT_STATUS_OK
;
1238 if (db
->persistent
) {
1240 * Persistent db, but not found in the transaction buffer
1242 return db_ctdb_ltdb_parse(
1243 ctx
, key
, db_ctdb_parse_record_parser
, &state
);
1247 state
.ask_for_readonly_copy
= false;
1249 status
= db_ctdb_ltdb_parse(
1250 ctx
, key
, db_ctdb_parse_record_parser_nonpersistent
, &state
);
1251 if (NT_STATUS_IS_OK(status
) && state
.done
) {
1252 return NT_STATUS_OK
;
1255 status
= ctdbd_fetch(messaging_ctdbd_connection(), ctx
->db_id
, key
,
1256 talloc_tos(), &data
, state
.ask_for_readonly_copy
);
1257 if (!NT_STATUS_IS_OK(status
)) {
1260 parser(key
, data
, private_data
);
1261 TALLOC_FREE(data
.dptr
);
1262 return NT_STATUS_OK
;
1265 struct traverse_state
{
1266 struct db_context
*db
;
1267 int (*fn
)(struct db_record
*rec
, void *private_data
);
1272 static void traverse_callback(TDB_DATA key
, TDB_DATA data
, void *private_data
)
1274 struct traverse_state
*state
= (struct traverse_state
*)private_data
;
1275 struct db_record
*rec
;
1276 TALLOC_CTX
*tmp_ctx
= talloc_new(state
->db
);
1277 /* we have to give them a locked record to prevent races */
1278 rec
= db_ctdb_fetch_locked(state
->db
, tmp_ctx
, key
);
1279 if (rec
&& rec
->value
.dsize
> 0) {
1280 state
->fn(rec
, state
->private_data
);
1282 talloc_free(tmp_ctx
);
1285 static int traverse_persistent_callback(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, TDB_DATA dbuf
,
1288 struct traverse_state
*state
= (struct traverse_state
*)private_data
;
1289 struct db_record
*rec
;
1290 TALLOC_CTX
*tmp_ctx
= talloc_new(state
->db
);
1294 * Skip the __db_sequence_number__ key:
1295 * This is used for persistent transactions internally.
1297 if (kbuf
.dsize
== strlen(CTDB_DB_SEQNUM_KEY
) + 1 &&
1298 strcmp((const char*)kbuf
.dptr
, CTDB_DB_SEQNUM_KEY
) == 0)
1303 /* we have to give them a locked record to prevent races */
1304 rec
= db_ctdb_fetch_locked(state
->db
, tmp_ctx
, kbuf
);
1305 if (rec
&& rec
->value
.dsize
> 0) {
1306 ret
= state
->fn(rec
, state
->private_data
);
1310 talloc_free(tmp_ctx
);
1314 /* wrapper to use traverse_persistent_callback with dbwrap */
1315 static int traverse_persistent_callback_dbwrap(struct db_record
*rec
, void* data
)
1317 return traverse_persistent_callback(NULL
, rec
->key
, rec
->value
, data
);
1321 static int db_ctdb_traverse(struct db_context
*db
,
1322 int (*fn
)(struct db_record
*rec
,
1323 void *private_data
),
1327 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
1328 struct db_ctdb_ctx
);
1329 struct traverse_state state
;
1333 state
.private_data
= private_data
;
1336 if (db
->persistent
) {
1337 struct tdb_context
*ltdb
= ctx
->wtdb
->tdb
;
1340 /* for persistent databases we don't need to do a ctdb traverse,
1341 we can do a faster local traverse */
1342 ret
= tdb_traverse(ltdb
, traverse_persistent_callback
, &state
);
1346 if (ctx
->transaction
&& ctx
->transaction
->m_write
) {
1348 * we now have to handle keys not yet
1349 * present at transaction start
1351 struct db_context
*newkeys
= db_open_rbt(talloc_tos());
1352 struct ctdb_marshall_buffer
*mbuf
= ctx
->transaction
->m_write
;
1353 struct ctdb_rec_data
*rec
=NULL
;
1357 if (newkeys
== NULL
) {
1361 for (i
=0; i
<mbuf
->count
; i
++) {
1363 rec
= db_ctdb_marshall_loop_next_key(
1365 SMB_ASSERT(rec
!= NULL
);
1367 if (!tdb_exists(ltdb
, key
)) {
1368 dbwrap_store(newkeys
, key
, tdb_null
, 0);
1371 status
= dbwrap_traverse(newkeys
,
1372 traverse_persistent_callback_dbwrap
,
1375 talloc_free(newkeys
);
1376 if (!NT_STATUS_IS_OK(status
)) {
1384 status
= ctdbd_traverse(ctx
->db_id
, traverse_callback
, &state
);
1385 if (!NT_STATUS_IS_OK(status
)) {
1391 static NTSTATUS
db_ctdb_store_deny(struct db_record
*rec
, TDB_DATA data
, int flag
)
1393 return NT_STATUS_MEDIA_WRITE_PROTECTED
;
1396 static NTSTATUS
db_ctdb_delete_deny(struct db_record
*rec
)
1398 return NT_STATUS_MEDIA_WRITE_PROTECTED
;
1401 static void traverse_read_callback(TDB_DATA key
, TDB_DATA data
, void *private_data
)
1403 struct traverse_state
*state
= (struct traverse_state
*)private_data
;
1404 struct db_record rec
;
1408 rec
.store
= db_ctdb_store_deny
;
1409 rec
.delete_rec
= db_ctdb_delete_deny
;
1410 rec
.private_data
= NULL
;
1411 state
->fn(&rec
, state
->private_data
);
1415 static int traverse_persistent_callback_read(TDB_CONTEXT
*tdb
, TDB_DATA kbuf
, TDB_DATA dbuf
,
1418 struct traverse_state
*state
= (struct traverse_state
*)private_data
;
1419 struct db_record rec
;
1422 * Skip the __db_sequence_number__ key:
1423 * This is used for persistent transactions internally.
1425 if (kbuf
.dsize
== strlen(CTDB_DB_SEQNUM_KEY
) + 1 &&
1426 strcmp((const char*)kbuf
.dptr
, CTDB_DB_SEQNUM_KEY
) == 0)
1434 rec
.store
= db_ctdb_store_deny
;
1435 rec
.delete_rec
= db_ctdb_delete_deny
;
1436 rec
.private_data
= NULL
;
1438 if (rec
.value
.dsize
<= sizeof(struct ctdb_ltdb_header
)) {
1439 /* a deleted record */
1442 rec
.value
.dsize
-= sizeof(struct ctdb_ltdb_header
);
1443 rec
.value
.dptr
+= sizeof(struct ctdb_ltdb_header
);
1446 return state
->fn(&rec
, state
->private_data
);
1449 static int db_ctdb_traverse_read(struct db_context
*db
,
1450 int (*fn
)(struct db_record
*rec
,
1451 void *private_data
),
1455 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
1456 struct db_ctdb_ctx
);
1457 struct traverse_state state
;
1461 state
.private_data
= private_data
;
1464 if (db
->persistent
) {
1465 /* for persistent databases we don't need to do a ctdb traverse,
1466 we can do a faster local traverse */
1467 return tdb_traverse_read(ctx
->wtdb
->tdb
, traverse_persistent_callback_read
, &state
);
1470 status
= ctdbd_traverse(ctx
->db_id
, traverse_read_callback
, &state
);
1471 if (!NT_STATUS_IS_OK(status
)) {
1477 static int db_ctdb_get_seqnum(struct db_context
*db
)
1479 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(db
->private_data
,
1480 struct db_ctdb_ctx
);
1481 return tdb_get_seqnum(ctx
->wtdb
->tdb
);
1484 static void db_ctdb_id(struct db_context
*db
, const uint8_t **id
,
1487 struct db_ctdb_ctx
*ctx
= talloc_get_type_abort(
1488 db
->private_data
, struct db_ctdb_ctx
);
1490 *id
= (uint8_t *)&ctx
->db_id
;
1491 *idlen
= sizeof(ctx
->db_id
);
1494 struct db_context
*db_open_ctdb(TALLOC_CTX
*mem_ctx
,
1496 int hash_size
, int tdb_flags
,
1497 int open_flags
, mode_t mode
,
1498 enum dbwrap_lock_order lock_order
)
1500 struct db_context
*result
;
1501 struct db_ctdb_ctx
*db_ctdb
;
1503 struct ctdbd_connection
*conn
;
1504 struct loadparm_context
*lp_ctx
;
1505 struct ctdb_db_priority prio
;
1509 if (!lp_clustering()) {
1510 DEBUG(10, ("Clustering disabled -- no ctdb\n"));
1514 if (!(result
= talloc_zero(mem_ctx
, struct db_context
))) {
1515 DEBUG(0, ("talloc failed\n"));
1516 TALLOC_FREE(result
);
1520 if (!(db_ctdb
= talloc(result
, struct db_ctdb_ctx
))) {
1521 DEBUG(0, ("talloc failed\n"));
1522 TALLOC_FREE(result
);
1526 result
->name
= talloc_strdup(result
, name
);
1527 if (result
->name
== NULL
) {
1528 DEBUG(0, ("talloc failed\n"));
1529 TALLOC_FREE(result
);
1533 db_ctdb
->transaction
= NULL
;
1534 db_ctdb
->db
= result
;
1536 conn
= messaging_ctdbd_connection();
1538 DEBUG(1, ("Could not connect to ctdb\n"));
1539 TALLOC_FREE(result
);
1543 if (!NT_STATUS_IS_OK(ctdbd_db_attach(conn
, name
, &db_ctdb
->db_id
, tdb_flags
))) {
1544 DEBUG(0, ("ctdbd_db_attach failed for %s\n", name
));
1545 TALLOC_FREE(result
);
1549 db_path
= ctdbd_dbpath(conn
, db_ctdb
, db_ctdb
->db_id
);
1551 result
->persistent
= ((tdb_flags
& TDB_CLEAR_IF_FIRST
) == 0);
1552 result
->lock_order
= lock_order
;
1554 /* only pass through specific flags */
1555 tdb_flags
&= TDB_SEQNUM
;
1557 /* honor permissions if user has specified O_CREAT */
1558 if (open_flags
& O_CREAT
) {
1559 chmod(db_path
, mode
);
1562 prio
.db_id
= db_ctdb
->db_id
;
1563 prio
.priority
= lock_order
;
1565 status
= ctdbd_control_local(
1566 conn
, CTDB_CONTROL_SET_DB_PRIORITY
, 0, 0,
1567 make_tdb_data((uint8_t *)&prio
, sizeof(prio
)),
1568 NULL
, NULL
, &cstatus
);
1570 if (!NT_STATUS_IS_OK(status
) || (cstatus
!= 0)) {
1571 DEBUG(1, ("CTDB_CONTROL_SET_DB_PRIORITY failed: %s, %d\n",
1572 nt_errstr(status
), cstatus
));
1573 TALLOC_FREE(result
);
1577 lp_ctx
= loadparm_init_s3(db_path
, loadparm_s3_helpers());
1579 db_ctdb
->wtdb
= tdb_wrap_open(db_ctdb
, db_path
, hash_size
, tdb_flags
,
1581 talloc_unlink(db_path
, lp_ctx
);
1582 if (db_ctdb
->wtdb
== NULL
) {
1583 DEBUG(0, ("Could not open tdb %s: %s\n", db_path
, strerror(errno
)));
1584 TALLOC_FREE(result
);
1587 talloc_free(db_path
);
1589 if (result
->persistent
) {
1590 db_ctdb
->lock_ctx
= g_lock_ctx_init(db_ctdb
,
1591 ctdb_conn_msg_ctx(conn
));
1592 if (db_ctdb
->lock_ctx
== NULL
) {
1593 DEBUG(0, ("g_lock_ctx_init failed\n"));
1594 TALLOC_FREE(result
);
1599 result
->private_data
= (void *)db_ctdb
;
1600 result
->fetch_locked
= db_ctdb_fetch_locked
;
1601 result
->try_fetch_locked
= db_ctdb_try_fetch_locked
;
1602 result
->parse_record
= db_ctdb_parse_record
;
1603 result
->traverse
= db_ctdb_traverse
;
1604 result
->traverse_read
= db_ctdb_traverse_read
;
1605 result
->get_seqnum
= db_ctdb_get_seqnum
;
1606 result
->transaction_start
= db_ctdb_transaction_start
;
1607 result
->transaction_commit
= db_ctdb_transaction_commit
;
1608 result
->transaction_cancel
= db_ctdb_transaction_cancel
;
1609 result
->id
= db_ctdb_id
;
1610 result
->stored_callback
= NULL
;
1612 DEBUG(3,("db_open_ctdb: opened database '%s' with dbid 0x%x\n",
1613 name
, db_ctdb
->db_id
));
1618 #else /* CLUSTER_SUPPORT */
1620 struct db_context
*db_open_ctdb(TALLOC_CTX
*mem_ctx
,
1622 int hash_size
, int tdb_flags
,
1623 int open_flags
, mode_t mode
,
1624 enum dbwrap_lock_order lock_order
)
1626 DEBUG(3, ("db_open_ctdb: no cluster support!\n"));