source: vendor/current/source3/lib/ctdbd_conn.c@ 740

Last change on this file since 740 was 740, checked in by Silvan Scherrer, 12 years ago

Samba Server: update vendor to 3.6.0
File size: 35.6 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Samba internal messaging functions
4 Copyright (C) 2007 by Volker Lendecke
5 Copyright (C) 2007 by Andrew Tridgell
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include "includes.h"
22#include "util_tdb.h"
23
24#ifdef CLUSTER_SUPPORT
25
26#include "ctdbd_conn.h"
27#include "packet.h"
28#include "messages.h"
29
30/* paths to these include files come from --with-ctdb= in configure */
31#include "ctdb.h"
32#include "ctdb_private.h"
33
34struct ctdbd_connection {
35 struct messaging_context *msg_ctx;
36 uint32 reqid;
37 uint32 our_vnn;
38 uint64 rand_srvid;
39 struct packet_context *pkt;
40 struct fd_event *fde;
41
42 void (*release_ip_handler)(const char *ip_addr, void *private_data);
43 void *release_ip_priv;
44};
45
46static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
47 uint32_t vnn, uint32 opcode,
48 uint64_t srvid, uint32_t flags, TDB_DATA data,
49 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
50 int *cstatus);
51
52/*
53 * exit on fatal communications errors with the ctdbd daemon
54 */
55static void cluster_fatal(const char *why)
56{
57 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
58 /* we don't use smb_panic() as we don't want to delay to write
59 a core file. We need to release this process id immediately
60 so that someone else can take over without getting sharing
61 violations */
62 _exit(1);
63}
64
65/*
66 *
67 */
68static void ctdb_packet_dump(struct ctdb_req_header *hdr)
69{
70 if (DEBUGLEVEL < 10) {
71 return;
72 }
73 DEBUGADD(10, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
74 (int)hdr->length, (int)hdr->ctdb_magic,
75 (int)hdr->ctdb_version, (int)hdr->generation,
76 (int)hdr->operation, (int)hdr->reqid));
77}
78
79/*
80 * Register a srvid with ctdbd
81 */
82static NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn,
83 uint64_t srvid)
84{
85
86 int cstatus;
87 return ctdbd_control(conn, CTDB_CURRENT_NODE,
88 CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
89 tdb_null, NULL, NULL, &cstatus);
90}
91
92/*
93 * get our vnn from the cluster
94 */
95static NTSTATUS get_cluster_vnn(struct ctdbd_connection *conn, uint32 *vnn)
96{
97 int32_t cstatus=-1;
98 NTSTATUS status;
99 status = ctdbd_control(conn,
100 CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
101 tdb_null, NULL, NULL, &cstatus);
102 if (!NT_STATUS_IS_OK(status)) {
103 cluster_fatal("ctdbd_control failed\n");
104 }
105 *vnn = (uint32_t)cstatus;
106 return status;
107}
108
109/*
110 * Are we active (i.e. not banned or stopped?)
111 */
112static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
113{
114 int32_t cstatus=-1;
115 NTSTATUS status;
116 TDB_DATA outdata;
117 struct ctdb_node_map *m;
118 uint32_t failure_flags;
119 bool ret = false;
120 int i;
121
122 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
123 CTDB_CONTROL_GET_NODEMAP, 0, 0,
124 tdb_null, talloc_tos(), &outdata, &cstatus);
125 if (!NT_STATUS_IS_OK(status)) {
126 cluster_fatal("ctdbd_control failed\n");
127 }
128 if ((cstatus != 0) || (outdata.dptr == NULL)) {
129 DEBUG(2, ("Received invalid ctdb data\n"));
130 return false;
131 }
132
133 m = (struct ctdb_node_map *)outdata.dptr;
134
135 for (i=0; i<m->num; i++) {
136 if (vnn == m->nodes[i].pnn) {
137 break;
138 }
139 }
140
141 if (i == m->num) {
142 DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
143 (int)vnn));
144 goto fail;
145 }
146
147 failure_flags = NODE_FLAGS_BANNED | NODE_FLAGS_DISCONNECTED
148 | NODE_FLAGS_PERMANENTLY_DISABLED | NODE_FLAGS_STOPPED;
149
150 if ((m->nodes[i].flags & failure_flags) != 0) {
151 DEBUG(2, ("Node has status %x, not active\n",
152 (int)m->nodes[i].flags));
153 goto fail;
154 }
155
156 ret = true;
157fail:
158 TALLOC_FREE(outdata.dptr);
159 return ret;
160}
161
162uint32 ctdbd_vnn(const struct ctdbd_connection *conn)
163{
164 return conn->our_vnn;
165}
166
167/*
168 * Get us a ctdb connection
169 */
170
171static NTSTATUS ctdbd_connect(TALLOC_CTX *mem_ctx,
172 struct packet_context **presult)
173{
174 struct packet_context *result;
175 const char *sockname = lp_ctdbd_socket();
176 struct sockaddr_un addr;
177 int fd;
178
179 if (!sockname || !*sockname) {
180 sockname = CTDB_PATH;
181 }
182
183 fd = socket(AF_UNIX, SOCK_STREAM, 0);
184 if (fd == -1) {
185 DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
186 return map_nt_error_from_unix(errno);
187 }
188
189 ZERO_STRUCT(addr);
190 addr.sun_family = AF_UNIX;
191 strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
192
193 if (sys_connect(fd, (struct sockaddr *)(void *)&addr) == -1) {
194 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
195 strerror(errno)));
196 close(fd);
197 return map_nt_error_from_unix(errno);
198 }
199
200 if (!(result = packet_init(mem_ctx, fd))) {
201 close(fd);
202 return NT_STATUS_NO_MEMORY;
203 }
204
205 *presult = result;
206 return NT_STATUS_OK;
207}
208
209/*
210 * Do we have a complete ctdb packet in the queue?
211 */
212
213static bool ctdb_req_complete(const uint8_t *buf, size_t available,
214 size_t *length,
215 void *private_data)
216{
217 uint32 msglen;
218
219 if (available < sizeof(msglen)) {
220 return False;
221 }
222
223 msglen = *((uint32 *)buf);
224
225 DEBUG(10, ("msglen = %d\n", msglen));
226
227 if (msglen < sizeof(struct ctdb_req_header)) {
228 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
229 "the req_header\n", (int)msglen,
230 (int)sizeof(struct ctdb_req_header)));
231 cluster_fatal("ctdbd protocol error\n");
232 }
233
234 if (available < msglen) {
235 return false;
236 }
237
238 *length = msglen;
239 return true;
240}
241
242/*
243 * State necessary to defer an incoming message while we are waiting for a
244 * ctdb reply.
245 */
246
247struct deferred_msg_state {
248 struct messaging_context *msg_ctx;
249 struct messaging_rec *rec;
250};
251
252/*
253 * Timed event handler for the deferred message
254 */
255
256static void deferred_message_dispatch(struct event_context *event_ctx,
257 struct timed_event *te,
258 struct timeval now,
259 void *private_data)
260{
261 struct deferred_msg_state *state = talloc_get_type_abort(
262 private_data, struct deferred_msg_state);
263
264 messaging_dispatch_rec(state->msg_ctx, state->rec);
265 TALLOC_FREE(state);
266 TALLOC_FREE(te);
267}
268
269struct req_pull_state {
270 TALLOC_CTX *mem_ctx;
271 DATA_BLOB req;
272};
273
274/*
275 * Pull a ctdb request out of the incoming packet queue
276 */
277
278static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
279 void *private_data)
280{
281 struct req_pull_state *state = (struct req_pull_state *)private_data;
282
283 state->req.data = talloc_move(state->mem_ctx, &buf);
284 state->req.length = length;
285 return NT_STATUS_OK;
286}
287
288/*
289 * Fetch a messaging_rec from an incoming ctdb style message
290 */
291
292static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
293 size_t overall_length,
294 struct ctdb_req_message *msg)
295{
296 struct messaging_rec *result;
297 DATA_BLOB blob;
298 enum ndr_err_code ndr_err;
299
300 if ((overall_length < offsetof(struct ctdb_req_message, data))
301 || (overall_length
302 < offsetof(struct ctdb_req_message, data) + msg->datalen)) {
303
304 cluster_fatal("got invalid msg length");
305 }
306
307 if (!(result = TALLOC_P(mem_ctx, struct messaging_rec))) {
308 DEBUG(0, ("talloc failed\n"));
309 return NULL;
310 }
311
312 blob = data_blob_const(msg->data, msg->datalen);
313
314 ndr_err = ndr_pull_struct_blob(
315 &blob, result, result,
316 (ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
317
318 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
319 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
320 ndr_errstr(ndr_err)));
321 TALLOC_FREE(result);
322 return NULL;
323 }
324
325 if (DEBUGLEVEL >= 10) {
326 DEBUG(10, ("ctdb_pull_messaging_rec:\n"));
327 NDR_PRINT_DEBUG(messaging_rec, result);
328 }
329
330 return result;
331}
332
333static NTSTATUS ctdb_packet_fd_read_sync(struct packet_context *ctx)
334{
335 int timeout = lp_ctdb_timeout();
336
337 if (timeout == 0) {
338 timeout = -1;
339 }
340 return packet_fd_read_sync(ctx, timeout);
341}
342
343/*
344 * Read a full ctdbd request. If we have a messaging context, defer incoming
345 * messages that might come in between.
346 */
347
348static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
349 TALLOC_CTX *mem_ctx, void *result)
350{
351 struct ctdb_req_header *hdr;
352 struct req_pull_state state;
353 NTSTATUS status;
354
355 again:
356
357 status = ctdb_packet_fd_read_sync(conn->pkt);
358
359 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
360 /* EAGAIN */
361 goto again;
362 } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
363 /* EAGAIN */
364 goto again;
365 }
366
367 if (!NT_STATUS_IS_OK(status)) {
368 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
369 cluster_fatal("ctdbd died\n");
370 }
371
372 next_pkt:
373
374 ZERO_STRUCT(state);
375 state.mem_ctx = mem_ctx;
376
377 if (!packet_handler(conn->pkt, ctdb_req_complete, ctdb_req_pull,
378 &state, &status)) {
379 /*
380 * Not enough data
381 */
382 DEBUG(10, ("not enough data from ctdb socket, retrying\n"));
383 goto again;
384 }
385
386 if (!NT_STATUS_IS_OK(status)) {
387 DEBUG(0, ("Could not read packet: %s\n", nt_errstr(status)));
388 cluster_fatal("ctdbd died\n");
389 }
390
391 hdr = (struct ctdb_req_header *)state.req.data;
392
393 DEBUG(10, ("Received ctdb packet\n"));
394 ctdb_packet_dump(hdr);
395
396 if (hdr->operation == CTDB_REQ_MESSAGE) {
397 struct timed_event *evt;
398 struct deferred_msg_state *msg_state;
399 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
400
401 if (conn->msg_ctx == NULL) {
402 DEBUG(1, ("Got a message without having a msg ctx, "
403 "dropping msg %llu\n",
404 (long long unsigned)msg->srvid));
405 goto next_pkt;
406 }
407
408 if ((conn->release_ip_handler != NULL)
409 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
410 /* must be dispatched immediately */
411 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
412 conn->release_ip_handler((const char *)msg->data,
413 conn->release_ip_priv);
414 TALLOC_FREE(hdr);
415 goto next_pkt;
416 }
417
418 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
419 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)) {
420
421 DEBUG(1, ("ctdb_read_req: Got %s message\n",
422 (msg->srvid == CTDB_SRVID_RECONFIGURE)
423 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
424
425 messaging_send(conn->msg_ctx,
426 messaging_server_id(conn->msg_ctx),
427 MSG_SMB_BRL_VALIDATE, &data_blob_null);
428 messaging_send(conn->msg_ctx,
429 messaging_server_id(conn->msg_ctx),
430 MSG_DBWRAP_G_LOCK_RETRY,
431 &data_blob_null);
432 TALLOC_FREE(hdr);
433 goto next_pkt;
434 }
435
436 msg_state = TALLOC_P(NULL, struct deferred_msg_state);
437 if (msg_state == NULL) {
438 DEBUG(0, ("talloc failed\n"));
439 TALLOC_FREE(hdr);
440 goto next_pkt;
441 }
442
443 if (!(msg_state->rec = ctdb_pull_messaging_rec(
444 msg_state, state.req.length, msg))) {
445 DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
446 TALLOC_FREE(msg_state);
447 TALLOC_FREE(hdr);
448 goto next_pkt;
449 }
450
451 TALLOC_FREE(hdr);
452
453 msg_state->msg_ctx = conn->msg_ctx;
454
455 /*
456 * We're waiting for a call reply, but an async message has
457 * crossed. Defer dispatching to the toplevel event loop.
458 */
459 evt = event_add_timed(conn->msg_ctx->event_ctx,
460 conn->msg_ctx->event_ctx,
461 timeval_zero(),
462 deferred_message_dispatch,
463 msg_state);
464 if (evt == NULL) {
465 DEBUG(0, ("event_add_timed failed\n"));
466 TALLOC_FREE(msg_state);
467 TALLOC_FREE(hdr);
468 goto next_pkt;
469 }
470
471 goto next_pkt;
472 }
473
474 if (hdr->reqid != reqid) {
475 /* we got the wrong reply */
476 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
477 "been %u\n", hdr->reqid, reqid));
478 TALLOC_FREE(hdr);
479 goto again;
480 }
481
482 *((void **)result) = talloc_move(mem_ctx, &hdr);
483
484 return NT_STATUS_OK;
485}
486
487/*
488 * Get us a ctdbd connection
489 */
490
491static NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
492 struct ctdbd_connection **pconn)
493{
494 struct ctdbd_connection *conn;
495 NTSTATUS status;
496
497 if (!(conn = TALLOC_ZERO_P(mem_ctx, struct ctdbd_connection))) {
498 DEBUG(0, ("talloc failed\n"));
499 return NT_STATUS_NO_MEMORY;
500 }
501
502 status = ctdbd_connect(conn, &conn->pkt);
503
504 if (!NT_STATUS_IS_OK(status)) {
505 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
506 goto fail;
507 }
508
509 status = get_cluster_vnn(conn, &conn->our_vnn);
510
511 if (!NT_STATUS_IS_OK(status)) {
512 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
513 goto fail;
514 }
515
516 if (!ctdbd_working(conn, conn->our_vnn)) {
517 DEBUG(2, ("Node is not working, can not connect\n"));
518 status = NT_STATUS_INTERNAL_DB_ERROR;
519 goto fail;
520 }
521
522 generate_random_buffer((unsigned char *)&conn->rand_srvid,
523 sizeof(conn->rand_srvid));
524
525 status = register_with_ctdbd(conn, conn->rand_srvid);
526
527 if (!NT_STATUS_IS_OK(status)) {
528 DEBUG(5, ("Could not register random srvid: %s\n",
529 nt_errstr(status)));
530 goto fail;
531 }
532
533 *pconn = conn;
534 return NT_STATUS_OK;
535
536 fail:
537 TALLOC_FREE(conn);
538 return status;
539}
540
541/*
542 * Get us a ctdbd connection and register us as a process
543 */
544
545NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
546 struct ctdbd_connection **pconn)
547{
548 struct ctdbd_connection *conn;
549 NTSTATUS status;
550
551 status = ctdbd_init_connection(mem_ctx, &conn);
552
553 if (!NT_STATUS_IS_OK(status)) {
554 return status;
555 }
556
557 status = register_with_ctdbd(conn, (uint64_t)sys_getpid());
558 if (!NT_STATUS_IS_OK(status)) {
559 goto fail;
560 }
561
562 status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
563 if (!NT_STATUS_IS_OK(status)) {
564 goto fail;
565 }
566
567 status = register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY);
568 if (!NT_STATUS_IS_OK(status)) {
569 goto fail;
570 }
571
572 *pconn = conn;
573 return NT_STATUS_OK;
574
575 fail:
576 TALLOC_FREE(conn);
577 return status;
578}
579
580struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
581{
582 return conn->msg_ctx;
583}
584
585int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
586{
587 return packet_get_fd(conn->pkt);
588}
589
590/*
591 * Packet handler to receive and handle a ctdb message
592 */
593static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
594 void *private_data)
595{
596 struct ctdbd_connection *conn = talloc_get_type_abort(
597 private_data, struct ctdbd_connection);
598 struct ctdb_req_message *msg;
599 struct messaging_rec *msg_rec;
600
601 msg = (struct ctdb_req_message *)buf;
602
603 if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
604 DEBUG(0, ("Received async msg of type %u, discarding\n",
605 msg->hdr.operation));
606 TALLOC_FREE(buf);
607 return NT_STATUS_INVALID_PARAMETER;
608 }
609
610 if ((conn->release_ip_handler != NULL)
611 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
612 /* must be dispatched immediately */
613 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
614 conn->release_ip_handler((const char *)msg->data,
615 conn->release_ip_priv);
616 TALLOC_FREE(buf);
617 return NT_STATUS_OK;
618 }
619
620 SMB_ASSERT(conn->msg_ctx != NULL);
621
622 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
623 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)){
624 DEBUG(0,("Got cluster reconfigure message\n"));
625 /*
626 * when the cluster is reconfigured or someone of the
627 * family has passed away (SAMBA_NOTIFY), we need to
628 * clean the brl database
629 */
630 messaging_send(conn->msg_ctx,
631 messaging_server_id(conn->msg_ctx),
632 MSG_SMB_BRL_VALIDATE, &data_blob_null);
633
634 messaging_send(conn->msg_ctx,
635 messaging_server_id(conn->msg_ctx),
636 MSG_DBWRAP_G_LOCK_RETRY,
637 &data_blob_null);
638
639 TALLOC_FREE(buf);
640 return NT_STATUS_OK;
641 }
642
643 /* only messages to our pid or the broadcast are valid here */
644 if (msg->srvid != sys_getpid() && msg->srvid != MSG_SRVID_SAMBA) {
645 DEBUG(0,("Got unexpected message with srvid=%llu\n",
646 (unsigned long long)msg->srvid));
647 TALLOC_FREE(buf);
648 return NT_STATUS_OK;
649 }
650
651 if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
652 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
653 TALLOC_FREE(buf);
654 return NT_STATUS_NO_MEMORY;
655 }
656
657 messaging_dispatch_rec(conn->msg_ctx, msg_rec);
658
659 TALLOC_FREE(msg_rec);
660 TALLOC_FREE(buf);
661 return NT_STATUS_OK;
662}
663
664/*
665 * The ctdbd socket is readable asynchronuously
666 */
667
668static void ctdbd_socket_handler(struct event_context *event_ctx,
669 struct fd_event *event,
670 uint16 flags,
671 void *private_data)
672{
673 struct ctdbd_connection *conn = talloc_get_type_abort(
674 private_data, struct ctdbd_connection);
675
676 NTSTATUS status;
677
678 status = packet_fd_read(conn->pkt);
679
680 if (!NT_STATUS_IS_OK(status)) {
681 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
682 cluster_fatal("ctdbd died\n");
683 }
684
685 while (packet_handler(conn->pkt, ctdb_req_complete,
686 ctdb_handle_message, conn, &status)) {
687 if (!NT_STATUS_IS_OK(status)) {
688 DEBUG(10, ("could not handle incoming message: %s\n",
689 nt_errstr(status)));
690 }
691 }
692}
693
694/*
695 * Prepare a ctdbd connection to receive messages
696 */
697
698NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
699 struct messaging_context *msg_ctx)
700{
701 SMB_ASSERT(conn->msg_ctx == NULL);
702 SMB_ASSERT(conn->fde == NULL);
703
704 if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
705 packet_get_fd(conn->pkt),
706 EVENT_FD_READ,
707 ctdbd_socket_handler,
708 conn))) {
709 DEBUG(0, ("event_add_fd failed\n"));
710 return NT_STATUS_NO_MEMORY;
711 }
712
713 conn->msg_ctx = msg_ctx;
714
715 return NT_STATUS_OK;
716}
717
718/*
719 * Send a messaging message across a ctdbd
720 */
721
722NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
723 uint32 dst_vnn, uint64 dst_srvid,
724 struct messaging_rec *msg)
725{
726 struct ctdb_req_message r;
727 TALLOC_CTX *mem_ctx;
728 DATA_BLOB blob;
729 NTSTATUS status;
730 enum ndr_err_code ndr_err;
731
732 if (!(mem_ctx = talloc_init("ctdbd_messaging_send"))) {
733 DEBUG(0, ("talloc failed\n"));
734 return NT_STATUS_NO_MEMORY;
735 }
736
737 ndr_err = ndr_push_struct_blob(
738 &blob, mem_ctx, msg,
739 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
740
741 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
742 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
743 ndr_errstr(ndr_err)));
744 status = ndr_map_error2ntstatus(ndr_err);
745 goto fail;
746 }
747
748 r.hdr.length = offsetof(struct ctdb_req_message, data) + blob.length;
749 r.hdr.ctdb_magic = CTDB_MAGIC;
750 r.hdr.ctdb_version = CTDB_VERSION;
751 r.hdr.generation = 1;
752 r.hdr.operation = CTDB_REQ_MESSAGE;
753 r.hdr.destnode = dst_vnn;
754 r.hdr.srcnode = conn->our_vnn;
755 r.hdr.reqid = 0;
756 r.srvid = dst_srvid;
757 r.datalen = blob.length;
758
759 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
760 ctdb_packet_dump(&r.hdr);
761
762 status = packet_send(
763 conn->pkt, 2,
764 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
765 blob);
766
767 if (!NT_STATUS_IS_OK(status)) {
768 DEBUG(0, ("packet_send failed: %s\n", nt_errstr(status)));
769 goto fail;
770 }
771
772 status = packet_flush(conn->pkt);
773
774 if (!NT_STATUS_IS_OK(status)) {
775 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
776 cluster_fatal("cluster dispatch daemon msg write error\n");
777 }
778
779 status = NT_STATUS_OK;
780 fail:
781 TALLOC_FREE(mem_ctx);
782 return status;
783}
784
785/*
786 * send/recv a generic ctdb control message
787 */
788static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
789 uint32_t vnn, uint32 opcode,
790 uint64_t srvid, uint32_t flags,
791 TDB_DATA data,
792 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
793 int *cstatus)
794{
795 struct ctdb_req_control req;
796 struct ctdb_reply_control *reply = NULL;
797 struct ctdbd_connection *new_conn = NULL;
798 NTSTATUS status;
799
800 /* the samba3 ctdb code can't handle NOREPLY yet */
801 flags &= ~CTDB_CTRL_FLAG_NOREPLY;
802
803 if (conn == NULL) {
804 status = ctdbd_init_connection(NULL, &new_conn);
805
806 if (!NT_STATUS_IS_OK(status)) {
807 DEBUG(10, ("Could not init temp connection: %s\n",
808 nt_errstr(status)));
809 goto fail;
810 }
811
812 conn = new_conn;
813 }
814
815 ZERO_STRUCT(req);
816 req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
817 req.hdr.ctdb_magic = CTDB_MAGIC;
818 req.hdr.ctdb_version = CTDB_VERSION;
819 req.hdr.operation = CTDB_REQ_CONTROL;
820 req.hdr.reqid = ++conn->reqid;
821 req.hdr.destnode = vnn;
822 req.opcode = opcode;
823 req.srvid = srvid;
824 req.datalen = data.dsize;
825 req.flags = flags;
826
827 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
828 ctdb_packet_dump(&req.hdr);
829
830 status = packet_send(
831 conn->pkt, 2,
832 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
833 data_blob_const(data.dptr, data.dsize));
834
835 if (!NT_STATUS_IS_OK(status)) {
836 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
837 goto fail;
838 }
839
840 status = packet_flush(conn->pkt);
841
842 if (!NT_STATUS_IS_OK(status)) {
843 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
844 cluster_fatal("cluster dispatch daemon control write error\n");
845 }
846
847 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
848 TALLOC_FREE(new_conn);
849 if (cstatus) {
850 *cstatus = 0;
851 }
852 return NT_STATUS_OK;
853 }
854
855 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
856
857 if (!NT_STATUS_IS_OK(status)) {
858 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
859 goto fail;
860 }
861
862 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
863 DEBUG(0, ("received invalid reply\n"));
864 goto fail;
865 }
866
867 if (outdata) {
868 if (!(outdata->dptr = (uint8 *)talloc_memdup(
869 mem_ctx, reply->data, reply->datalen))) {
870 TALLOC_FREE(reply);
871 return NT_STATUS_NO_MEMORY;
872 }
873 outdata->dsize = reply->datalen;
874 }
875 if (cstatus) {
876 (*cstatus) = reply->status;
877 }
878
879 status = NT_STATUS_OK;
880
881 fail:
882 TALLOC_FREE(new_conn);
883 TALLOC_FREE(reply);
884 return status;
885}
886
887/*
888 * see if a remote process exists
889 */
890bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
891{
892 NTSTATUS status;
893 TDB_DATA data;
894 int32_t cstatus;
895
896 data.dptr = (uint8_t*)&pid;
897 data.dsize = sizeof(pid);
898
899 status = ctdbd_control(conn, vnn, CTDB_CONTROL_PROCESS_EXISTS, 0, 0,
900 data, NULL, NULL, &cstatus);
901 if (!NT_STATUS_IS_OK(status)) {
902 DEBUG(0, (__location__ " ctdb_control for process_exists "
903 "failed\n"));
904 return False;
905 }
906
907 return cstatus == 0;
908}
909
910/*
911 * Get a db path
912 */
913char *ctdbd_dbpath(struct ctdbd_connection *conn,
914 TALLOC_CTX *mem_ctx, uint32_t db_id)
915{
916 NTSTATUS status;
917 TDB_DATA data;
918 int32_t cstatus;
919
920 data.dptr = (uint8_t*)&db_id;
921 data.dsize = sizeof(db_id);
922
923 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
924 CTDB_CONTROL_GETDBPATH, 0, 0, data,
925 mem_ctx, &data, &cstatus);
926 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
927 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
928 return NULL;
929 }
930
931 return (char *)data.dptr;
932}
933
934/*
935 * attach to a ctdb database
936 */
937NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
938 const char *name, uint32_t *db_id, int tdb_flags)
939{
940 NTSTATUS status;
941 TDB_DATA data;
942 int32_t cstatus;
943 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
944
945 data.dptr = (uint8_t*)name;
946 data.dsize = strlen(name)+1;
947
948 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
949 persistent
950 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
951 : CTDB_CONTROL_DB_ATTACH,
952 tdb_flags, 0, data, NULL, &data, &cstatus);
953 if (!NT_STATUS_IS_OK(status)) {
954 DEBUG(0, (__location__ " ctdb_control for db_attach "
955 "failed: %s\n", nt_errstr(status)));
956 return status;
957 }
958
959 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
960 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
961 return NT_STATUS_INTERNAL_ERROR;
962 }
963
964 *db_id = *(uint32_t *)data.dptr;
965 talloc_free(data.dptr);
966
967 if (!(tdb_flags & TDB_SEQNUM)) {
968 return NT_STATUS_OK;
969 }
970
971 data.dptr = (uint8_t *)db_id;
972 data.dsize = sizeof(*db_id);
973
974 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
975 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
976 NULL, NULL, &cstatus);
977 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
978 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
979 "failed\n"));
980 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
981 status;
982 }
983
984 return NT_STATUS_OK;
985}
986
987/*
988 * force the migration of a record to this node
989 */
990NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
991 TDB_DATA key)
992{
993 struct ctdb_req_call req;
994 struct ctdb_reply_call *reply;
995 NTSTATUS status;
996
997 ZERO_STRUCT(req);
998
999 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1000 req.hdr.ctdb_magic = CTDB_MAGIC;
1001 req.hdr.ctdb_version = CTDB_VERSION;
1002 req.hdr.operation = CTDB_REQ_CALL;
1003 req.hdr.reqid = ++conn->reqid;
1004 req.flags = CTDB_IMMEDIATE_MIGRATION;
1005 req.callid = CTDB_NULL_FUNC;
1006 req.db_id = db_id;
1007 req.keylen = key.dsize;
1008
1009 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
1010 ctdb_packet_dump(&req.hdr);
1011
1012 status = packet_send(
1013 conn->pkt, 2,
1014 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1015 data_blob_const(key.dptr, key.dsize));
1016
1017 if (!NT_STATUS_IS_OK(status)) {
1018 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
1019 return status;
1020 }
1021
1022 status = packet_flush(conn->pkt);
1023
1024 if (!NT_STATUS_IS_OK(status)) {
1025 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1026 cluster_fatal("cluster dispatch daemon control write error\n");
1027 }
1028
1029 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1030
1031 if (!NT_STATUS_IS_OK(status)) {
1032 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1033 goto fail;
1034 }
1035
1036 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1037 DEBUG(0, ("received invalid reply\n"));
1038 status = NT_STATUS_INTERNAL_ERROR;
1039 goto fail;
1040 }
1041
1042 status = NT_STATUS_OK;
1043 fail:
1044
1045 TALLOC_FREE(reply);
1046 return status;
1047}
1048
1049/*
1050 * remotely fetch a record without locking it or forcing a migration
1051 */
1052NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
1053 TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
1054{
1055 struct ctdb_req_call req;
1056 struct ctdb_reply_call *reply;
1057 NTSTATUS status;
1058
1059 ZERO_STRUCT(req);
1060
1061 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1062 req.hdr.ctdb_magic = CTDB_MAGIC;
1063 req.hdr.ctdb_version = CTDB_VERSION;
1064 req.hdr.operation = CTDB_REQ_CALL;
1065 req.hdr.reqid = ++conn->reqid;
1066 req.flags = 0;
1067 req.callid = CTDB_FETCH_FUNC;
1068 req.db_id = db_id;
1069 req.keylen = key.dsize;
1070
1071 status = packet_send(
1072 conn->pkt, 2,
1073 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1074 data_blob_const(key.dptr, key.dsize));
1075
1076 if (!NT_STATUS_IS_OK(status)) {
1077 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
1078 return status;
1079 }
1080
1081 status = packet_flush(conn->pkt);
1082
1083 if (!NT_STATUS_IS_OK(status)) {
1084 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1085 cluster_fatal("cluster dispatch daemon control write error\n");
1086 }
1087
1088 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1089
1090 if (!NT_STATUS_IS_OK(status)) {
1091 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1092 goto fail;
1093 }
1094
1095 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1096 DEBUG(0, ("received invalid reply\n"));
1097 status = NT_STATUS_INTERNAL_ERROR;
1098 goto fail;
1099 }
1100
1101 data->dsize = reply->datalen;
1102 if (data->dsize == 0) {
1103 data->dptr = NULL;
1104 goto done;
1105 }
1106
1107 data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1108 reply->datalen);
1109 if (data->dptr == NULL) {
1110 DEBUG(0, ("talloc failed\n"));
1111 status = NT_STATUS_NO_MEMORY;
1112 goto fail;
1113 }
1114
1115 done:
1116 status = NT_STATUS_OK;
1117 fail:
1118 TALLOC_FREE(reply);
1119 return status;
1120}
1121
1122struct ctdbd_traverse_state {
1123 void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1124 void *private_data;
1125};
1126
1127/*
1128 * Handle a traverse record coming in on the ctdbd connection
1129 */
1130
1131static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1132 void *private_data)
1133{
1134 struct ctdbd_traverse_state *state =
1135 (struct ctdbd_traverse_state *)private_data;
1136
1137 struct ctdb_req_message *m;
1138 struct ctdb_rec_data *d;
1139 TDB_DATA key, data;
1140
1141 m = (struct ctdb_req_message *)buf;
1142
1143 if (length < sizeof(*m) || m->hdr.length != length) {
1144 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1145 TALLOC_FREE(buf);
1146 return NT_STATUS_UNEXPECTED_IO_ERROR;
1147 }
1148
1149 d = (struct ctdb_rec_data *)&m->data[0];
1150 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1151 DEBUG(0, ("Got invalid traverse data of length %d\n",
1152 (int)m->datalen));
1153 TALLOC_FREE(buf);
1154 return NT_STATUS_UNEXPECTED_IO_ERROR;
1155 }
1156
1157 key.dsize = d->keylen;
1158 key.dptr = &d->data[0];
1159 data.dsize = d->datalen;
1160 data.dptr = &d->data[d->keylen];
1161
1162 if (key.dsize == 0 && data.dsize == 0) {
1163 /* end of traverse */
1164 return NT_STATUS_END_OF_FILE;
1165 }
1166
1167 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1168 DEBUG(0, ("Got invalid ltdb header length %d\n",
1169 (int)data.dsize));
1170 TALLOC_FREE(buf);
1171 return NT_STATUS_UNEXPECTED_IO_ERROR;
1172 }
1173 data.dsize -= sizeof(struct ctdb_ltdb_header);
1174 data.dptr += sizeof(struct ctdb_ltdb_header);
1175
1176 if (state->fn) {
1177 state->fn(key, data, state->private_data);
1178 }
1179
1180 TALLOC_FREE(buf);
1181 return NT_STATUS_OK;
1182}
1183
1184/*
1185 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1186 connection to ctdbd to avoid the hairy recursive and async problems with
1187 everything in-line.
1188*/
1189
1190NTSTATUS ctdbd_traverse(uint32 db_id,
1191 void (*fn)(TDB_DATA key, TDB_DATA data,
1192 void *private_data),
1193 void *private_data)
1194{
1195 struct ctdbd_connection *conn;
1196 NTSTATUS status;
1197
1198 TDB_DATA data;
1199 struct ctdb_traverse_start t;
1200 int cstatus;
1201 struct ctdbd_traverse_state state;
1202
1203 status = ctdbd_init_connection(NULL, &conn);
1204 if (!NT_STATUS_IS_OK(status)) {
1205 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1206 nt_errstr(status)));
1207 return status;
1208 }
1209
1210 t.db_id = db_id;
1211 t.srvid = conn->rand_srvid;
1212 t.reqid = ++conn->reqid;
1213
1214 data.dptr = (uint8_t *)&t;
1215 data.dsize = sizeof(t);
1216
1217 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1218 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1219 data, NULL, NULL, &cstatus);
1220
1221 if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1222
1223 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1224 cstatus));
1225
1226 if (NT_STATUS_IS_OK(status)) {
1227 /*
1228 * We need a mapping here
1229 */
1230 status = NT_STATUS_UNSUCCESSFUL;
1231 }
1232 goto done;
1233 }
1234
1235 state.fn = fn;
1236 state.private_data = private_data;
1237
1238 while (True) {
1239
1240 status = NT_STATUS_OK;
1241
1242 if (packet_handler(conn->pkt, ctdb_req_complete,
1243 ctdb_traverse_handler, &state, &status)) {
1244
1245 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1246 status = NT_STATUS_OK;
1247 break;
1248 }
1249
1250 /*
1251 * There might be more in the queue
1252 */
1253 continue;
1254 }
1255
1256 if (!NT_STATUS_IS_OK(status)) {
1257 break;
1258 }
1259
1260 status = ctdb_packet_fd_read_sync(conn->pkt);
1261
1262 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1263 /*
1264 * There might be more in the queue
1265 */
1266 continue;
1267 }
1268
1269 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1270 status = NT_STATUS_OK;
1271 break;
1272 }
1273
1274 if (!NT_STATUS_IS_OK(status)) {
1275 DEBUG(0, ("packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1276 cluster_fatal("ctdbd died\n");
1277 }
1278 }
1279
1280 done:
1281 TALLOC_FREE(conn);
1282 return status;
1283}
1284
1285/*
1286 This is used to canonicalize a ctdb_sock_addr structure.
1287*/
1288static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1289 struct sockaddr_storage *out)
1290{
1291 memcpy(out, in, sizeof (*out));
1292
1293#ifdef HAVE_IPV6
1294 if (in->ss_family == AF_INET6) {
1295 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1296 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1297 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1298 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1299 memset(out, 0, sizeof(*out));
1300#ifdef HAVE_SOCK_SIN_LEN
1301 out4->sin_len = sizeof(*out);
1302#endif
1303 out4->sin_family = AF_INET;
1304 out4->sin_port = in6->sin6_port;
1305 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1306 }
1307 }
1308#endif
1309}
1310
1311/*
1312 * Register us as a server for a particular tcp connection
1313 */
1314
1315NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1316 const struct sockaddr_storage *_server,
1317 const struct sockaddr_storage *_client,
1318 void (*release_ip_handler)(const char *ip_addr,
1319 void *private_data),
1320 void *private_data)
1321{
1322 /*
1323 * we still use ctdb_control_tcp for ipv4
1324 * because we want to work against older ctdb
1325 * versions at runtime
1326 */
1327 struct ctdb_control_tcp p4;
1328#ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1329 struct ctdb_control_tcp_addr p;
1330#endif
1331 TDB_DATA data;
1332 NTSTATUS status;
1333 struct sockaddr_storage client;
1334 struct sockaddr_storage server;
1335
1336 /*
1337 * Only one connection so far
1338 */
1339 SMB_ASSERT(conn->release_ip_handler == NULL);
1340
1341 smbd_ctdb_canonicalize_ip(_client, &client);
1342 smbd_ctdb_canonicalize_ip(_server, &server);
1343
1344 switch (client.ss_family) {
1345 case AF_INET:
1346 p4.dest = *(struct sockaddr_in *)(void *)&server;
1347 p4.src = *(struct sockaddr_in *)(void *)&client;
1348 data.dptr = (uint8_t *)&p4;
1349 data.dsize = sizeof(p4);
1350 break;
1351#ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1352 case AF_INET6:
1353 p.dest.ip6 = *(struct sockaddr_in6 *)(void *)&server;
1354 p.src.ip6 = *(struct sockaddr_in6 *)(void *)&client;
1355 data.dptr = (uint8_t *)&p;
1356 data.dsize = sizeof(p);
1357 break;
1358#endif
1359 default:
1360 return NT_STATUS_INTERNAL_ERROR;
1361 }
1362
1363 conn->release_ip_handler = release_ip_handler;
1364 /*
1365 * store the IP address of the server socket for later
1366 * comparison in release_ip()
1367 */
1368 conn->release_ip_priv = private_data;
1369
1370 /*
1371 * We want to be told about IP releases
1372 */
1373
1374 status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1375 if (!NT_STATUS_IS_OK(status)) {
1376 return status;
1377 }
1378
1379 /*
1380 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1381 * can send an extra ack to trigger a reset for our client, so it
1382 * immediately reconnects
1383 */
1384 return ctdbd_control(conn, CTDB_CURRENT_NODE,
1385 CTDB_CONTROL_TCP_CLIENT, 0,
1386 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1387}
1388
1389/*
1390 * We want to handle reconfigure events
1391 */
1392NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1393{
1394 return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1395}
1396
1397/*
1398 call a control on the local node
1399 */
1400NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1401 uint64_t srvid, uint32_t flags, TDB_DATA data,
1402 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1403 int *cstatus)
1404{
1405 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1406}
1407
1408NTSTATUS ctdb_watch_us(struct ctdbd_connection *conn)
1409{
1410 struct ctdb_client_notify_register reg_data;
1411 size_t struct_len;
1412 NTSTATUS status;
1413 int cstatus;
1414
1415 reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1416 reg_data.len = 1;
1417 reg_data.notify_data[0] = 0;
1418
1419 struct_len = offsetof(struct ctdb_client_notify_register,
1420 notify_data) + reg_data.len;
1421
1422 status = ctdbd_control_local(
1423 conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
1424 make_tdb_data((uint8_t *)&reg_data, struct_len),
1425 NULL, NULL, &cstatus);
1426 if (!NT_STATUS_IS_OK(status)) {
1427 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1428 nt_errstr(status)));
1429 }
1430 return status;
1431}
1432
1433NTSTATUS ctdb_unwatch(struct ctdbd_connection *conn)
1434{
1435 struct ctdb_client_notify_deregister dereg_data;
1436 NTSTATUS status;
1437 int cstatus;
1438
1439 dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1440
1441 status = ctdbd_control_local(
1442 conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
1443 make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
1444 NULL, NULL, &cstatus);
1445 if (!NT_STATUS_IS_OK(status)) {
1446 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1447 nt_errstr(status)));
1448 }
1449 return status;
1450}
1451
1452#endif
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