?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3: Make ctdbd_messaging_send_blob available in non-clustered mode
[Samba/gebeck_regimport.git] / source3 / lib / ctdbd_conn.c
blob8219bd281be3482bbd6f3dce1149cf4afcbb1a3b
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 #include "serverid.h"
24 #include "ctdbd_conn.h"
25
26 #ifdef CLUSTER_SUPPORT
27
28 #include "ctdb_packet.h"
29 #include "messages.h"
30
31 /*
32 * It is not possible to include ctdb.h and tdb_compat.h (included via
33 * some other include above) without warnings. This fixes those
34 * warnings.
35 */
36
37 #ifdef typesafe_cb
38 #undef typesafe_cb
39 #endif
40
41 #ifdef typesafe_cb_preargs
42 #undef typesafe_cb_preargs
43 #endif
44
45 #ifdef typesafe_cb_postargs
46 #undef typesafe_cb_postargs
47 #endif
48
49 /* paths to these include files come from --with-ctdb= in configure */
50
51 #include "ctdb.h"
52 #include "ctdb_private.h"
53
54 struct ctdbd_connection {
55 struct messaging_context *msg_ctx;
56 uint32 reqid;
57 uint32 our_vnn;
58 uint64 rand_srvid;
59 struct ctdb_packet_context *pkt;
60 struct fd_event *fde;
61
62 void (*release_ip_handler)(const char *ip_addr, void *private_data);
63 void *release_ip_priv;
64 };
65
66 static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
67 {
68 conn->reqid += 1;
69 if (conn->reqid == 0) {
70 conn->reqid += 1;
71 }
72 return conn->reqid;
73 }
74
75 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
76 uint32_t vnn, uint32 opcode,
77 uint64_t srvid, uint32_t flags, TDB_DATA data,
78 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
79 int *cstatus);
80
81 /*
82 * exit on fatal communications errors with the ctdbd daemon
83 */
84 static void cluster_fatal(const char *why)
85 {
86 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
87 /* we don't use smb_panic() as we don't want to delay to write
88 a core file. We need to release this process id immediately
89 so that someone else can take over without getting sharing
90 violations */
91 _exit(1);
92 }
93
94 /*
95 *
96 */
97 static void ctdb_packet_dump(struct ctdb_req_header *hdr)
98 {
99 if (DEBUGLEVEL < 11) {
100 return;
101 }
102 DEBUGADD(11, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
103 (int)hdr->length, (int)hdr->ctdb_magic,
104 (int)hdr->ctdb_version, (int)hdr->generation,
105 (int)hdr->operation, (int)hdr->reqid));
106 }
107
108 /*
109 * Register a srvid with ctdbd
110 */
111 NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn, uint64_t srvid)
112 {
113
114 int cstatus;
115 return ctdbd_control(conn, CTDB_CURRENT_NODE,
116 CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
117 tdb_null, NULL, NULL, &cstatus);
118 }
119
120 /*
121 * get our vnn from the cluster
122 */
123 static NTSTATUS get_cluster_vnn(struct ctdbd_connection *conn, uint32 *vnn)
124 {
125 int32_t cstatus=-1;
126 NTSTATUS status;
127 status = ctdbd_control(conn,
128 CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
129 tdb_null, NULL, NULL, &cstatus);
130 if (!NT_STATUS_IS_OK(status)) {
131 cluster_fatal("ctdbd_control failed\n");
132 }
133 *vnn = (uint32_t)cstatus;
134 return status;
135 }
136
137 /*
138 * Are we active (i.e. not banned or stopped?)
139 */
140 static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
141 {
142 int32_t cstatus=-1;
143 NTSTATUS status;
144 TDB_DATA outdata;
145 struct ctdb_node_map *m;
146 uint32_t failure_flags;
147 bool ret = false;
148 int i;
149
150 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
151 CTDB_CONTROL_GET_NODEMAP, 0, 0,
152 tdb_null, talloc_tos(), &outdata, &cstatus);
153 if (!NT_STATUS_IS_OK(status)) {
154 cluster_fatal("ctdbd_control failed\n");
155 }
156 if ((cstatus != 0) || (outdata.dptr == NULL)) {
157 DEBUG(2, ("Received invalid ctdb data\n"));
158 return false;
159 }
160
161 m = (struct ctdb_node_map *)outdata.dptr;
162
163 for (i=0; i<m->num; i++) {
164 if (vnn == m->nodes[i].pnn) {
165 break;
166 }
167 }
168
169 if (i == m->num) {
170 DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
171 (int)vnn));
172 goto fail;
173 }
174
175 failure_flags = NODE_FLAGS_BANNED | NODE_FLAGS_DISCONNECTED
176 | NODE_FLAGS_PERMANENTLY_DISABLED | NODE_FLAGS_STOPPED;
177
178 if ((m->nodes[i].flags & failure_flags) != 0) {
179 DEBUG(2, ("Node has status %x, not active\n",
180 (int)m->nodes[i].flags));
181 goto fail;
182 }
183
184 ret = true;
185 fail:
186 TALLOC_FREE(outdata.dptr);
187 return ret;
188 }
189
190 uint32 ctdbd_vnn(const struct ctdbd_connection *conn)
191 {
192 return conn->our_vnn;
193 }
194
195 /*
196 * Get us a ctdb connection
197 */
198
199 static NTSTATUS ctdbd_connect(TALLOC_CTX *mem_ctx,
200 struct ctdb_packet_context **presult)
201 {
202 struct ctdb_packet_context *result;
203 const char *sockname = lp_ctdbd_socket();
204 struct sockaddr_un addr;
205 int fd;
206 socklen_t salen;
207
208 fd = socket(AF_UNIX, SOCK_STREAM, 0);
209 if (fd == -1) {
210 DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
211 return map_nt_error_from_unix(errno);
212 }
213
214 ZERO_STRUCT(addr);
215 addr.sun_family = AF_UNIX;
216 strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
217
218 salen = sizeof(struct sockaddr_un);
219 if (connect(fd, (struct sockaddr *)(void *)&addr, salen) == -1) {
220 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
221 strerror(errno)));
222 close(fd);
223 return map_nt_error_from_unix(errno);
224 }
225
226 if (!(result = ctdb_packet_init(mem_ctx, fd))) {
227 close(fd);
228 return NT_STATUS_NO_MEMORY;
229 }
230
231 *presult = result;
232 return NT_STATUS_OK;
233 }
234
235 /*
236 * Do we have a complete ctdb packet in the queue?
237 */
238
239 static bool ctdb_req_complete(const uint8_t *buf, size_t available,
240 size_t *length,
241 void *private_data)
242 {
243 uint32 msglen;
244
245 if (available < sizeof(msglen)) {
246 return False;
247 }
248
249 msglen = *((uint32 *)buf);
250
251 DEBUG(11, ("msglen = %d\n", msglen));
252
253 if (msglen < sizeof(struct ctdb_req_header)) {
254 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
255 "the req_header\n", (int)msglen,
256 (int)sizeof(struct ctdb_req_header)));
257 cluster_fatal("ctdbd protocol error\n");
258 }
259
260 if (available < msglen) {
261 return false;
262 }
263
264 *length = msglen;
265 return true;
266 }
267
268 /*
269 * State necessary to defer an incoming message while we are waiting for a
270 * ctdb reply.
271 */
272
273 struct deferred_msg_state {
274 struct messaging_context *msg_ctx;
275 struct messaging_rec *rec;
276 };
277
278 /*
279 * Timed event handler for the deferred message
280 */
281
282 static void deferred_message_dispatch(struct event_context *event_ctx,
283 struct timed_event *te,
284 struct timeval now,
285 void *private_data)
286 {
287 struct deferred_msg_state *state = talloc_get_type_abort(
288 private_data, struct deferred_msg_state);
289
290 messaging_dispatch_rec(state->msg_ctx, state->rec);
291 TALLOC_FREE(state);
292 TALLOC_FREE(te);
293 }
294
295 struct req_pull_state {
296 TALLOC_CTX *mem_ctx;
297 DATA_BLOB req;
298 };
299
300 /*
301 * Pull a ctdb request out of the incoming ctdb_packet queue
302 */
303
304 static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
305 void *private_data)
306 {
307 struct req_pull_state *state = (struct req_pull_state *)private_data;
308
309 state->req.data = talloc_move(state->mem_ctx, &buf);
310 state->req.length = length;
311 return NT_STATUS_OK;
312 }
313
314 /*
315 * Fetch a messaging_rec from an incoming ctdb style message
316 */
317
318 static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
319 size_t overall_length,
320 struct ctdb_req_message *msg)
321 {
322 struct messaging_rec *result;
323 DATA_BLOB blob;
324 enum ndr_err_code ndr_err;
325
326 if ((overall_length < offsetof(struct ctdb_req_message, data))
327 || (overall_length
328 < offsetof(struct ctdb_req_message, data) + msg->datalen)) {
329
330 cluster_fatal("got invalid msg length");
331 }
332
333 if (!(result = talloc(mem_ctx, struct messaging_rec))) {
334 DEBUG(0, ("talloc failed\n"));
335 return NULL;
336 }
337
338 blob = data_blob_const(msg->data, msg->datalen);
339
340 ndr_err = ndr_pull_struct_blob(
341 &blob, result, result,
342 (ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
343
344 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
345 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
346 ndr_errstr(ndr_err)));
347 TALLOC_FREE(result);
348 return NULL;
349 }
350
351 if (DEBUGLEVEL >= 11) {
352 DEBUG(11, ("ctdb_pull_messaging_rec:\n"));
353 NDR_PRINT_DEBUG(messaging_rec, result);
354 }
355
356 return result;
357 }
358
359 static NTSTATUS ctdb_packet_fd_read_sync(struct ctdb_packet_context *ctx)
360 {
361 int timeout = lp_ctdb_timeout();
362
363 if (timeout == 0) {
364 timeout = -1;
365 }
366 return ctdb_packet_fd_read_sync_timeout(ctx, timeout);
367 }
368
369 /*
370 * Read a full ctdbd request. If we have a messaging context, defer incoming
371 * messages that might come in between.
372 */
373
374 static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
375 TALLOC_CTX *mem_ctx, void *result)
376 {
377 struct ctdb_req_header *hdr;
378 struct req_pull_state state;
379 NTSTATUS status;
380
381 next_pkt:
382 ZERO_STRUCT(state);
383 state.mem_ctx = mem_ctx;
384
385 while (!ctdb_packet_handler(conn->pkt, ctdb_req_complete,
386 ctdb_req_pull, &state, &status)) {
387 /*
388 * Not enough data
389 */
390 status = ctdb_packet_fd_read_sync(conn->pkt);
391
392 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
393 /* EAGAIN */
394 continue;
395 } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
396 /* EAGAIN */
397 continue;
398 }
399
400 if (!NT_STATUS_IS_OK(status)) {
401 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
402 cluster_fatal("ctdbd died\n");
403 }
404 }
405
406 if (!NT_STATUS_IS_OK(status)) {
407 DEBUG(0, ("Could not read ctdb_packet: %s\n", nt_errstr(status)));
408 cluster_fatal("ctdbd died\n");
409 }
410
411 hdr = (struct ctdb_req_header *)state.req.data;
412
413 DEBUG(11, ("Received ctdb packet\n"));
414 ctdb_packet_dump(hdr);
415
416 if (hdr->operation == CTDB_REQ_MESSAGE) {
417 struct timed_event *evt;
418 struct deferred_msg_state *msg_state;
419 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
420
421 if (conn->msg_ctx == NULL) {
422 DEBUG(1, ("Got a message without having a msg ctx, "
423 "dropping msg %llu\n",
424 (long long unsigned)msg->srvid));
425 goto next_pkt;
426 }
427
428 if ((conn->release_ip_handler != NULL)
429 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
430 /* must be dispatched immediately */
431 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
432 conn->release_ip_handler((const char *)msg->data,
433 conn->release_ip_priv);
434 TALLOC_FREE(hdr);
435 goto next_pkt;
436 }
437
438 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
439 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)) {
440
441 DEBUG(1, ("ctdb_read_req: Got %s message\n",
442 (msg->srvid == CTDB_SRVID_RECONFIGURE)
443 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
444
445 messaging_send(conn->msg_ctx,
446 messaging_server_id(conn->msg_ctx),
447 MSG_SMB_BRL_VALIDATE, &data_blob_null);
448 messaging_send(conn->msg_ctx,
449 messaging_server_id(conn->msg_ctx),
450 MSG_DBWRAP_G_LOCK_RETRY,
451 &data_blob_null);
452 TALLOC_FREE(hdr);
453 goto next_pkt;
454 }
455
456 msg_state = talloc(NULL, struct deferred_msg_state);
457 if (msg_state == NULL) {
458 DEBUG(0, ("talloc failed\n"));
459 TALLOC_FREE(hdr);
460 goto next_pkt;
461 }
462
463 if (!(msg_state->rec = ctdb_pull_messaging_rec(
464 msg_state, state.req.length, msg))) {
465 DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
466 TALLOC_FREE(msg_state);
467 TALLOC_FREE(hdr);
468 goto next_pkt;
469 }
470
471 TALLOC_FREE(hdr);
472
473 msg_state->msg_ctx = conn->msg_ctx;
474
475 /*
476 * We're waiting for a call reply, but an async message has
477 * crossed. Defer dispatching to the toplevel event loop.
478 */
479 evt = event_add_timed(conn->msg_ctx->event_ctx,
480 conn->msg_ctx->event_ctx,
481 timeval_zero(),
482 deferred_message_dispatch,
483 msg_state);
484 if (evt == NULL) {
485 DEBUG(0, ("event_add_timed failed\n"));
486 TALLOC_FREE(msg_state);
487 TALLOC_FREE(hdr);
488 goto next_pkt;
489 }
490
491 goto next_pkt;
492 }
493
494 if ((reqid != 0) && (hdr->reqid != reqid)) {
495 /* we got the wrong reply */
496 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
497 "been %u\n", hdr->reqid, reqid));
498 TALLOC_FREE(hdr);
499 goto next_pkt;
500 }
501
502 *((void **)result) = talloc_move(mem_ctx, &hdr);
503
504 return NT_STATUS_OK;
505 }
506
507 /*
508 * Get us a ctdbd connection
509 */
510
511 static NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
512 struct ctdbd_connection **pconn)
513 {
514 struct ctdbd_connection *conn;
515 NTSTATUS status;
516
517 if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
518 DEBUG(0, ("talloc failed\n"));
519 return NT_STATUS_NO_MEMORY;
520 }
521
522 status = ctdbd_connect(conn, &conn->pkt);
523
524 if (!NT_STATUS_IS_OK(status)) {
525 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
526 goto fail;
527 }
528
529 status = get_cluster_vnn(conn, &conn->our_vnn);
530
531 if (!NT_STATUS_IS_OK(status)) {
532 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
533 goto fail;
534 }
535
536 if (!ctdbd_working(conn, conn->our_vnn)) {
537 DEBUG(2, ("Node is not working, can not connect\n"));
538 status = NT_STATUS_INTERNAL_DB_ERROR;
539 goto fail;
540 }
541
542 generate_random_buffer((unsigned char *)&conn->rand_srvid,
543 sizeof(conn->rand_srvid));
544
545 status = register_with_ctdbd(conn, conn->rand_srvid);
546
547 if (!NT_STATUS_IS_OK(status)) {
548 DEBUG(5, ("Could not register random srvid: %s\n",
549 nt_errstr(status)));
550 goto fail;
551 }
552
553 *pconn = conn;
554 return NT_STATUS_OK;
555
556 fail:
557 TALLOC_FREE(conn);
558 return status;
559 }
560
561 /*
562 * Get us a ctdbd connection and register us as a process
563 */
564
565 NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
566 struct ctdbd_connection **pconn)
567 {
568 struct ctdbd_connection *conn;
569 NTSTATUS status;
570
571 status = ctdbd_init_connection(mem_ctx, &conn);
572
573 if (!NT_STATUS_IS_OK(status)) {
574 return status;
575 }
576
577 status = register_with_ctdbd(conn, (uint64_t)getpid());
578 if (!NT_STATUS_IS_OK(status)) {
579 goto fail;
580 }
581
582 status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
583 if (!NT_STATUS_IS_OK(status)) {
584 goto fail;
585 }
586
587 status = register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY);
588 if (!NT_STATUS_IS_OK(status)) {
589 goto fail;
590 }
591
592 *pconn = conn;
593 return NT_STATUS_OK;
594
595 fail:
596 TALLOC_FREE(conn);
597 return status;
598 }
599
600 struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
601 {
602 return conn->msg_ctx;
603 }
604
605 int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
606 {
607 return ctdb_packet_get_fd(conn->pkt);
608 }
609
610 /*
611 * Packet handler to receive and handle a ctdb message
612 */
613 static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
614 void *private_data)
615 {
616 struct ctdbd_connection *conn = talloc_get_type_abort(
617 private_data, struct ctdbd_connection);
618 struct ctdb_req_message *msg;
619 struct messaging_rec *msg_rec;
620
621 msg = (struct ctdb_req_message *)buf;
622
623 if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
624 DEBUG(0, ("Received async msg of type %u, discarding\n",
625 msg->hdr.operation));
626 TALLOC_FREE(buf);
627 return NT_STATUS_INVALID_PARAMETER;
628 }
629
630 if ((conn->release_ip_handler != NULL)
631 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
632 /* must be dispatched immediately */
633 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
634 conn->release_ip_handler((const char *)msg->data,
635 conn->release_ip_priv);
636 TALLOC_FREE(buf);
637 return NT_STATUS_OK;
638 }
639
640 SMB_ASSERT(conn->msg_ctx != NULL);
641
642 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
643 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)){
644 DEBUG(0,("Got cluster reconfigure message\n"));
645 /*
646 * when the cluster is reconfigured or someone of the
647 * family has passed away (SAMBA_NOTIFY), we need to
648 * clean the brl database
649 */
650 messaging_send(conn->msg_ctx,
651 messaging_server_id(conn->msg_ctx),
652 MSG_SMB_BRL_VALIDATE, &data_blob_null);
653
654 messaging_send(conn->msg_ctx,
655 messaging_server_id(conn->msg_ctx),
656 MSG_DBWRAP_G_LOCK_RETRY,
657 &data_blob_null);
658
659 TALLOC_FREE(buf);
660 return NT_STATUS_OK;
661 }
662
663 /* only messages to our pid or the broadcast are valid here */
664 if (msg->srvid != getpid() && msg->srvid != MSG_SRVID_SAMBA) {
665 DEBUG(0,("Got unexpected message with srvid=%llu\n",
666 (unsigned long long)msg->srvid));
667 TALLOC_FREE(buf);
668 return NT_STATUS_OK;
669 }
670
671 if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
672 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
673 TALLOC_FREE(buf);
674 return NT_STATUS_NO_MEMORY;
675 }
676
677 messaging_dispatch_rec(conn->msg_ctx, msg_rec);
678
679 TALLOC_FREE(msg_rec);
680 TALLOC_FREE(buf);
681 return NT_STATUS_OK;
682 }
683
684 /*
685 * The ctdbd socket is readable asynchronuously
686 */
687
688 static void ctdbd_socket_handler(struct event_context *event_ctx,
689 struct fd_event *event,
690 uint16 flags,
691 void *private_data)
692 {
693 struct ctdbd_connection *conn = talloc_get_type_abort(
694 private_data, struct ctdbd_connection);
695
696 NTSTATUS status;
697
698 status = ctdb_packet_fd_read(conn->pkt);
699
700 if (!NT_STATUS_IS_OK(status)) {
701 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
702 cluster_fatal("ctdbd died\n");
703 }
704
705 while (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
706 ctdb_handle_message, conn, &status)) {
707 if (!NT_STATUS_IS_OK(status)) {
708 DEBUG(10, ("could not handle incoming message: %s\n",
709 nt_errstr(status)));
710 }
711 }
712 }
713
714 /*
715 * Prepare a ctdbd connection to receive messages
716 */
717
718 NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
719 struct messaging_context *msg_ctx)
720 {
721 SMB_ASSERT(conn->msg_ctx == NULL);
722 SMB_ASSERT(conn->fde == NULL);
723
724 if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
725 ctdb_packet_get_fd(conn->pkt),
726 EVENT_FD_READ,
727 ctdbd_socket_handler,
728 conn))) {
729 DEBUG(0, ("event_add_fd failed\n"));
730 return NT_STATUS_NO_MEMORY;
731 }
732
733 conn->msg_ctx = msg_ctx;
734
735 return NT_STATUS_OK;
736 }
737
738 /*
739 * Send a messaging message across a ctdbd
740 */
741
742 NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
743 uint32 dst_vnn, uint64 dst_srvid,
744 struct messaging_rec *msg)
745 {
746 DATA_BLOB blob;
747 NTSTATUS status;
748 enum ndr_err_code ndr_err;
749
750 ndr_err = ndr_push_struct_blob(
751 &blob, talloc_tos(), msg,
752 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
753
754 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
755 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
756 ndr_errstr(ndr_err)));
757 return ndr_map_error2ntstatus(ndr_err);
758 }
759
760 status = ctdbd_messaging_send_blob(conn, dst_vnn, dst_srvid,
761 blob.data, blob.length);
762 TALLOC_FREE(blob.data);
763 return NT_STATUS_OK;
764 }
765
766 NTSTATUS ctdbd_messaging_send_blob(struct ctdbd_connection *conn,
767 uint32 dst_vnn, uint64 dst_srvid,
768 const uint8_t *buf, size_t buflen)
769 {
770 struct ctdb_req_message r;
771 NTSTATUS status;
772
773 r.hdr.length = offsetof(struct ctdb_req_message, data) + buflen;
774 r.hdr.ctdb_magic = CTDB_MAGIC;
775 r.hdr.ctdb_version = CTDB_VERSION;
776 r.hdr.generation = 1;
777 r.hdr.operation = CTDB_REQ_MESSAGE;
778 r.hdr.destnode = dst_vnn;
779 r.hdr.srcnode = conn->our_vnn;
780 r.hdr.reqid = 0;
781 r.srvid = dst_srvid;
782 r.datalen = buflen;
783
784 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
785 ctdb_packet_dump(&r.hdr);
786
787 status = ctdb_packet_send(
788 conn->pkt, 2,
789 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
790 data_blob_const(buf, buflen));
791
792 if (!NT_STATUS_IS_OK(status)) {
793 DEBUG(0, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
794 return status;
795 }
796
797 status = ctdb_packet_flush(conn->pkt);
798 if (!NT_STATUS_IS_OK(status)) {
799 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
800 cluster_fatal("cluster dispatch daemon msg write error\n");
801 }
802 return NT_STATUS_OK;
803 }
804
805 /*
806 * send/recv a generic ctdb control message
807 */
808 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
809 uint32_t vnn, uint32 opcode,
810 uint64_t srvid, uint32_t flags,
811 TDB_DATA data,
812 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
813 int *cstatus)
814 {
815 struct ctdb_req_control req;
816 struct ctdb_reply_control *reply = NULL;
817 struct ctdbd_connection *new_conn = NULL;
818 NTSTATUS status;
819
820 if (conn == NULL) {
821 status = ctdbd_init_connection(NULL, &new_conn);
822
823 if (!NT_STATUS_IS_OK(status)) {
824 DEBUG(10, ("Could not init temp connection: %s\n",
825 nt_errstr(status)));
826 goto fail;
827 }
828
829 conn = new_conn;
830 }
831
832 ZERO_STRUCT(req);
833 req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
834 req.hdr.ctdb_magic = CTDB_MAGIC;
835 req.hdr.ctdb_version = CTDB_VERSION;
836 req.hdr.operation = CTDB_REQ_CONTROL;
837 req.hdr.reqid = ctdbd_next_reqid(conn);
838 req.hdr.destnode = vnn;
839 req.opcode = opcode;
840 req.srvid = srvid;
841 req.datalen = data.dsize;
842 req.flags = flags;
843
844 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
845 ctdb_packet_dump(&req.hdr);
846
847 status = ctdb_packet_send(
848 conn->pkt, 2,
849 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
850 data_blob_const(data.dptr, data.dsize));
851
852 if (!NT_STATUS_IS_OK(status)) {
853 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
854 goto fail;
855 }
856
857 status = ctdb_packet_flush(conn->pkt);
858
859 if (!NT_STATUS_IS_OK(status)) {
860 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
861 cluster_fatal("cluster dispatch daemon control write error\n");
862 }
863
864 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
865 TALLOC_FREE(new_conn);
866 if (cstatus) {
867 *cstatus = 0;
868 }
869 return NT_STATUS_OK;
870 }
871
872 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
873
874 if (!NT_STATUS_IS_OK(status)) {
875 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
876 goto fail;
877 }
878
879 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
880 DEBUG(0, ("received invalid reply\n"));
881 goto fail;
882 }
883
884 if (outdata) {
885 if (!(outdata->dptr = (uint8 *)talloc_memdup(
886 mem_ctx, reply->data, reply->datalen))) {
887 TALLOC_FREE(reply);
888 return NT_STATUS_NO_MEMORY;
889 }
890 outdata->dsize = reply->datalen;
891 }
892 if (cstatus) {
893 (*cstatus) = reply->status;
894 }
895
896 status = NT_STATUS_OK;
897
898 fail:
899 TALLOC_FREE(new_conn);
900 TALLOC_FREE(reply);
901 return status;
902 }
903
904 /*
905 * see if a remote process exists
906 */
907 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
908 {
909 struct server_id id;
910 bool result;
911
912 id.pid = pid;
913 id.vnn = vnn;
914
915 if (!ctdb_processes_exist(conn, &id, 1, &result)) {
916 DEBUG(10, ("ctdb_processes_exist failed\n"));
917 return false;
918 }
919 return result;
920 }
921
922 bool ctdb_processes_exist(struct ctdbd_connection *conn,
923 const struct server_id *pids, int num_pids,
924 bool *results)
925 {
926 TALLOC_CTX *frame = talloc_stackframe();
927 int i, num_received;
928 NTSTATUS status;
929 uint32_t *reqids;
930 bool result = false;
931
932 reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
933 if (reqids == NULL) {
934 goto fail;
935 }
936
937 for (i=0; i<num_pids; i++) {
938 struct ctdb_req_control req;
939 pid_t pid;
940
941 results[i] = false;
942 reqids[i] = ctdbd_next_reqid(conn);
943
944 ZERO_STRUCT(req);
945
946 /*
947 * pids[i].pid is uint64_t, scale down to pid_t which
948 * is the wire protocol towards ctdb.
949 */
950 pid = pids[i].pid;
951
952 DEBUG(10, ("Requesting PID %d/%d, reqid=%d\n",
953 (int)pids[i].vnn, (int)pid,
954 (int)reqids[i]));
955
956 req.hdr.length = offsetof(struct ctdb_req_control, data);
957 req.hdr.length += sizeof(pid);
958 req.hdr.ctdb_magic = CTDB_MAGIC;
959 req.hdr.ctdb_version = CTDB_VERSION;
960 req.hdr.operation = CTDB_REQ_CONTROL;
961 req.hdr.reqid = reqids[i];
962 req.hdr.destnode = pids[i].vnn;
963 req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
964 req.srvid = 0;
965 req.datalen = sizeof(pid);
966 req.flags = 0;
967
968 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
969 ctdb_packet_dump(&req.hdr);
970
971 status = ctdb_packet_send(
972 conn->pkt, 2,
973 data_blob_const(
974 &req, offsetof(struct ctdb_req_control, data)),
975 data_blob_const(&pid, sizeof(pid)));
976 if (!NT_STATUS_IS_OK(status)) {
977 DEBUG(10, ("ctdb_packet_send failed: %s\n",
978 nt_errstr(status)));
979 goto fail;
980 }
981 }
982
983 status = ctdb_packet_flush(conn->pkt);
984 if (!NT_STATUS_IS_OK(status)) {
985 DEBUG(10, ("ctdb_packet_flush failed: %s\n",
986 nt_errstr(status)));
987 goto fail;
988 }
989
990 num_received = 0;
991
992 while (num_received < num_pids) {
993 struct ctdb_reply_control *reply = NULL;
994 uint32_t reqid;
995
996 status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
997 if (!NT_STATUS_IS_OK(status)) {
998 DEBUG(10, ("ctdb_read_req failed: %s\n",
999 nt_errstr(status)));
1000 goto fail;
1001 }
1002
1003 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
1004 DEBUG(10, ("Received invalid reply\n"));
1005 goto fail;
1006 }
1007
1008 reqid = reply->hdr.reqid;
1009
1010 DEBUG(10, ("Received reqid %d\n", (int)reqid));
1011
1012 for (i=0; i<num_pids; i++) {
1013 if (reqid == reqids[i]) {
1014 break;
1015 }
1016 }
1017 if (i == num_pids) {
1018 DEBUG(10, ("Received unknown record number %u\n",
1019 (unsigned)reqid));
1020 goto fail;
1021 }
1022 results[i] = ((reply->status) == 0);
1023 TALLOC_FREE(reply);
1024 num_received += 1;
1025 }
1026
1027 result = true;
1028 fail:
1029 TALLOC_FREE(frame);
1030 return result;
1031 }
1032
1033 struct ctdb_vnn_list {
1034 uint32_t vnn;
1035 uint32_t reqid;
1036 unsigned num_srvids;
1037 unsigned num_filled;
1038 uint64_t *srvids;
1039 unsigned *pid_indexes;
1040 };
1041
1042 /*
1043 * Get a list of all vnns mentioned in a list of
1044 * server_ids. vnn_indexes tells where in the vnns array we have to
1045 * place the pids.
1046 */
1047 static bool ctdb_collect_vnns(TALLOC_CTX *mem_ctx,
1048 const struct server_id *pids, unsigned num_pids,
1049 struct ctdb_vnn_list **pvnns,
1050 unsigned *pnum_vnns)
1051 {
1052 struct ctdb_vnn_list *vnns = NULL;
1053 unsigned *vnn_indexes = NULL;
1054 unsigned i, num_vnns = 0;
1055
1056 vnn_indexes = talloc_array(mem_ctx, unsigned, num_pids);
1057 if (vnn_indexes == NULL) {
1058 goto fail;
1059 }
1060
1061 for (i=0; i<num_pids; i++) {
1062 unsigned j;
1063 uint32_t vnn = pids[i].vnn;
1064
1065 for (j=0; j<num_vnns; j++) {
1066 if (vnn == vnns[j].vnn) {
1067 break;
1068 }
1069 }
1070 vnn_indexes[i] = j;
1071
1072 if (j < num_vnns) {
1073 /*
1074 * Already in the array
1075 */
1076 vnns[j].num_srvids += 1;
1077 continue;
1078 }
1079 vnns = talloc_realloc(mem_ctx, vnns, struct ctdb_vnn_list,
1080 num_vnns+1);
1081 if (vnns == NULL) {
1082 goto fail;
1083 }
1084 vnns[num_vnns].vnn = vnn;
1085 vnns[num_vnns].num_srvids = 1;
1086 vnns[num_vnns].num_filled = 0;
1087 num_vnns += 1;
1088 }
1089 for (i=0; i<num_vnns; i++) {
1090 struct ctdb_vnn_list *vnn = &vnns[i];
1091
1092 vnn->srvids = talloc_array(vnns, uint64_t, vnn->num_srvids);
1093 if (vnn->srvids == NULL) {
1094 goto fail;
1095 }
1096 vnn->pid_indexes = talloc_array(vnns, unsigned,
1097 vnn->num_srvids);
1098 if (vnn->pid_indexes == NULL) {
1099 goto fail;
1100 }
1101 }
1102 for (i=0; i<num_pids; i++) {
1103 struct ctdb_vnn_list *vnn = &vnns[vnn_indexes[i]];
1104 vnn->srvids[vnn->num_filled] = pids[i].unique_id;
1105 vnn->pid_indexes[vnn->num_filled] = i;
1106 vnn->num_filled += 1;
1107 }
1108
1109 TALLOC_FREE(vnn_indexes);
1110 *pvnns = vnns;
1111 *pnum_vnns = num_vnns;
1112 return true;
1113 fail:
1114 TALLOC_FREE(vnns);
1115 TALLOC_FREE(vnn_indexes);
1116 return false;
1117 }
1118
1119 #ifdef HAVE_CTDB_CONTROL_CHECK_SRVIDS_DECL
1120
1121 bool ctdb_serverids_exist(struct ctdbd_connection *conn,
1122 const struct server_id *pids, unsigned num_pids,
1123 bool *results)
1124 {
1125 unsigned i, num_received;
1126 NTSTATUS status;
1127 struct ctdb_vnn_list *vnns = NULL;
1128 unsigned num_vnns;
1129 bool result = false;
1130
1131 if (!ctdb_collect_vnns(talloc_tos(), pids, num_pids,
1132 &vnns, &num_vnns)) {
1133 goto fail;
1134 }
1135
1136 for (i=0; i<num_vnns; i++) {
1137 struct ctdb_vnn_list *vnn = &vnns[i];
1138 struct ctdb_req_control req;
1139
1140 vnn->reqid = ctdbd_next_reqid(conn);
1141
1142 ZERO_STRUCT(req);
1143
1144 DEBUG(10, ("Requesting VNN %d, reqid=%d, num_srvids=%u\n",
1145 (int)vnn->vnn, (int)vnn->reqid, vnn->num_srvids));
1146
1147 req.hdr.length = offsetof(struct ctdb_req_control, data);
1148 req.hdr.ctdb_magic = CTDB_MAGIC;
1149 req.hdr.ctdb_version = CTDB_VERSION;
1150 req.hdr.operation = CTDB_REQ_CONTROL;
1151 req.hdr.reqid = vnn->reqid;
1152 req.hdr.destnode = vnn->vnn;
1153 req.opcode = CTDB_CONTROL_CHECK_SRVIDS;
1154 req.srvid = 0;
1155 req.datalen = sizeof(uint64_t) * vnn->num_srvids;
1156 req.hdr.length += req.datalen;
1157 req.flags = 0;
1158
1159 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
1160 ctdb_packet_dump(&req.hdr);
1161
1162 status = ctdb_packet_send(
1163 conn->pkt, 2,
1164 data_blob_const(
1165 &req, offsetof(struct ctdb_req_control,
1166 data)),
1167 data_blob_const(vnn->srvids, req.datalen));
1168 if (!NT_STATUS_IS_OK(status)) {
1169 DEBUG(10, ("ctdb_packet_send failed: %s\n",
1170 nt_errstr(status)));
1171 goto fail;
1172 }
1173 }
1174
1175 status = ctdb_packet_flush(conn->pkt);
1176 if (!NT_STATUS_IS_OK(status)) {
1177 DEBUG(10, ("ctdb_packet_flush failed: %s\n",
1178 nt_errstr(status)));
1179 goto fail;
1180 }
1181
1182 num_received = 0;
1183
1184 while (num_received < num_vnns) {
1185 struct ctdb_reply_control *reply = NULL;
1186 struct ctdb_vnn_list *vnn;
1187 uint32_t reqid;
1188
1189 status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
1190 if (!NT_STATUS_IS_OK(status)) {
1191 DEBUG(10, ("ctdb_read_req failed: %s\n",
1192 nt_errstr(status)));
1193 goto fail;
1194 }
1195
1196 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
1197 DEBUG(10, ("Received invalid reply\n"));
1198 goto fail;
1199 }
1200
1201 reqid = reply->hdr.reqid;
1202
1203 DEBUG(10, ("Received reqid %d\n", (int)reqid));
1204
1205 for (i=0; i<num_vnns; i++) {
1206 if (reqid == vnns[i].reqid) {
1207 break;
1208 }
1209 }
1210 if (i == num_vnns) {
1211 DEBUG(10, ("Received unknown reqid number %u\n",
1212 (unsigned)reqid));
1213 goto fail;
1214 }
1215
1216 DEBUG(10, ("Found index %u\n", i));
1217
1218 vnn = &vnns[i];
1219
1220 DEBUG(10, ("Received vnn %u, vnn->num_srvids %u, datalen %u\n",
1221 (unsigned)vnn->vnn, vnn->num_srvids,
1222 (unsigned)reply->datalen));
1223
1224 if (reply->datalen < ((vnn->num_srvids+7)/8)) {
1225 DEBUG(10, ("Received short reply\n"));
1226 goto fail;
1227 }
1228
1229 for (i=0; i<vnn->num_srvids; i++) {
1230 int idx = vnn->pid_indexes[i];
1231
1232 if (pids[i].unique_id ==
1233 SERVERID_UNIQUE_ID_NOT_TO_VERIFY) {
1234 results[idx] = true;
1235 continue;
1236 }
1237 results[idx] = ((reply->data[i/8] & (1<<(i%8))) != 0);
1238 }
1239
1240 TALLOC_FREE(reply);
1241 num_received += 1;
1242 }
1243
1244 result = true;
1245 fail:
1246 TALLOC_FREE(vnns);
1247 return result;
1248 }
1249
1250 #endif /* HAVE_CTDB_CONTROL_CHECK_SRVIDS_DECL */
1251
1252 /*
1253 * Get a db path
1254 */
1255 char *ctdbd_dbpath(struct ctdbd_connection *conn,
1256 TALLOC_CTX *mem_ctx, uint32_t db_id)
1257 {
1258 NTSTATUS status;
1259 TDB_DATA data;
1260 int32_t cstatus;
1261
1262 data.dptr = (uint8_t*)&db_id;
1263 data.dsize = sizeof(db_id);
1264
1265 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1266 CTDB_CONTROL_GETDBPATH, 0, 0, data,
1267 mem_ctx, &data, &cstatus);
1268 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1269 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
1270 return NULL;
1271 }
1272
1273 return (char *)data.dptr;
1274 }
1275
1276 /*
1277 * attach to a ctdb database
1278 */
1279 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
1280 const char *name, uint32_t *db_id, int tdb_flags)
1281 {
1282 NTSTATUS status;
1283 TDB_DATA data;
1284 int32_t cstatus;
1285 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
1286
1287 data.dptr = (uint8_t*)name;
1288 data.dsize = strlen(name)+1;
1289
1290 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1291 persistent
1292 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
1293 : CTDB_CONTROL_DB_ATTACH,
1294 tdb_flags, 0, data, NULL, &data, &cstatus);
1295 if (!NT_STATUS_IS_OK(status)) {
1296 DEBUG(0, (__location__ " ctdb_control for db_attach "
1297 "failed: %s\n", nt_errstr(status)));
1298 return status;
1299 }
1300
1301 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
1302 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
1303 return NT_STATUS_INTERNAL_ERROR;
1304 }
1305
1306 *db_id = *(uint32_t *)data.dptr;
1307 talloc_free(data.dptr);
1308
1309 if (!(tdb_flags & TDB_SEQNUM)) {
1310 return NT_STATUS_OK;
1311 }
1312
1313 data.dptr = (uint8_t *)db_id;
1314 data.dsize = sizeof(*db_id);
1315
1316 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1317 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
1318 NULL, NULL, &cstatus);
1319 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1320 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
1321 "failed\n"));
1322 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
1323 status;
1324 }
1325
1326 return NT_STATUS_OK;
1327 }
1328
1329 /*
1330 * force the migration of a record to this node
1331 */
1332 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
1333 TDB_DATA key)
1334 {
1335 struct ctdb_req_call req;
1336 struct ctdb_reply_call *reply;
1337 NTSTATUS status;
1338
1339 ZERO_STRUCT(req);
1340
1341 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1342 req.hdr.ctdb_magic = CTDB_MAGIC;
1343 req.hdr.ctdb_version = CTDB_VERSION;
1344 req.hdr.operation = CTDB_REQ_CALL;
1345 req.hdr.reqid = ctdbd_next_reqid(conn);
1346 req.flags = CTDB_IMMEDIATE_MIGRATION;
1347 req.callid = CTDB_NULL_FUNC;
1348 req.db_id = db_id;
1349 req.keylen = key.dsize;
1350
1351 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
1352 ctdb_packet_dump(&req.hdr);
1353
1354 status = ctdb_packet_send(
1355 conn->pkt, 2,
1356 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1357 data_blob_const(key.dptr, key.dsize));
1358
1359 if (!NT_STATUS_IS_OK(status)) {
1360 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1361 return status;
1362 }
1363
1364 status = ctdb_packet_flush(conn->pkt);
1365
1366 if (!NT_STATUS_IS_OK(status)) {
1367 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1368 cluster_fatal("cluster dispatch daemon control write error\n");
1369 }
1370
1371 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1372
1373 if (!NT_STATUS_IS_OK(status)) {
1374 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1375 goto fail;
1376 }
1377
1378 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1379 DEBUG(0, ("received invalid reply\n"));
1380 status = NT_STATUS_INTERNAL_ERROR;
1381 goto fail;
1382 }
1383
1384 status = NT_STATUS_OK;
1385 fail:
1386
1387 TALLOC_FREE(reply);
1388 return status;
1389 }
1390
1391 /*
1392 * remotely fetch a record (read-only)
1393 */
1394 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
1395 TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data,
1396 bool local_copy)
1397 {
1398 struct ctdb_req_call req;
1399 struct ctdb_reply_call *reply;
1400 NTSTATUS status;
1401 uint32_t flags;
1402
1403 #ifdef HAVE_CTDB_WANT_READONLY_DECL
1404 flags = local_copy ? CTDB_WANT_READONLY : 0;
1405 #else
1406 flags = 0;
1407 #endif
1408
1409 ZERO_STRUCT(req);
1410
1411 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1412 req.hdr.ctdb_magic = CTDB_MAGIC;
1413 req.hdr.ctdb_version = CTDB_VERSION;
1414 req.hdr.operation = CTDB_REQ_CALL;
1415 req.hdr.reqid = ctdbd_next_reqid(conn);
1416 req.flags = flags;
1417 req.callid = CTDB_FETCH_FUNC;
1418 req.db_id = db_id;
1419 req.keylen = key.dsize;
1420
1421 status = ctdb_packet_send(
1422 conn->pkt, 2,
1423 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1424 data_blob_const(key.dptr, key.dsize));
1425
1426 if (!NT_STATUS_IS_OK(status)) {
1427 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1428 return status;
1429 }
1430
1431 status = ctdb_packet_flush(conn->pkt);
1432
1433 if (!NT_STATUS_IS_OK(status)) {
1434 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1435 cluster_fatal("cluster dispatch daemon control write error\n");
1436 }
1437
1438 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1439
1440 if (!NT_STATUS_IS_OK(status)) {
1441 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1442 goto fail;
1443 }
1444
1445 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1446 DEBUG(0, ("received invalid reply\n"));
1447 status = NT_STATUS_INTERNAL_ERROR;
1448 goto fail;
1449 }
1450
1451 data->dsize = reply->datalen;
1452 if (data->dsize == 0) {
1453 data->dptr = NULL;
1454 goto done;
1455 }
1456
1457 data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1458 reply->datalen);
1459 if (data->dptr == NULL) {
1460 DEBUG(0, ("talloc failed\n"));
1461 status = NT_STATUS_NO_MEMORY;
1462 goto fail;
1463 }
1464
1465 done:
1466 status = NT_STATUS_OK;
1467 fail:
1468 TALLOC_FREE(reply);
1469 return status;
1470 }
1471
1472 struct ctdbd_traverse_state {
1473 void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1474 void *private_data;
1475 };
1476
1477 /*
1478 * Handle a traverse record coming in on the ctdbd connection
1479 */
1480
1481 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1482 void *private_data)
1483 {
1484 struct ctdbd_traverse_state *state =
1485 (struct ctdbd_traverse_state *)private_data;
1486
1487 struct ctdb_req_message *m;
1488 struct ctdb_rec_data *d;
1489 TDB_DATA key, data;
1490
1491 m = (struct ctdb_req_message *)buf;
1492
1493 if (length < sizeof(*m) || m->hdr.length != length) {
1494 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1495 TALLOC_FREE(buf);
1496 return NT_STATUS_UNEXPECTED_IO_ERROR;
1497 }
1498
1499 d = (struct ctdb_rec_data *)&m->data[0];
1500 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1501 DEBUG(0, ("Got invalid traverse data of length %d\n",
1502 (int)m->datalen));
1503 TALLOC_FREE(buf);
1504 return NT_STATUS_UNEXPECTED_IO_ERROR;
1505 }
1506
1507 key.dsize = d->keylen;
1508 key.dptr = &d->data[0];
1509 data.dsize = d->datalen;
1510 data.dptr = &d->data[d->keylen];
1511
1512 if (key.dsize == 0 && data.dsize == 0) {
1513 /* end of traverse */
1514 return NT_STATUS_END_OF_FILE;
1515 }
1516
1517 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1518 DEBUG(0, ("Got invalid ltdb header length %d\n",
1519 (int)data.dsize));
1520 TALLOC_FREE(buf);
1521 return NT_STATUS_UNEXPECTED_IO_ERROR;
1522 }
1523 data.dsize -= sizeof(struct ctdb_ltdb_header);
1524 data.dptr += sizeof(struct ctdb_ltdb_header);
1525
1526 if (state->fn) {
1527 state->fn(key, data, state->private_data);
1528 }
1529
1530 TALLOC_FREE(buf);
1531 return NT_STATUS_OK;
1532 }
1533
1534 /*
1535 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1536 connection to ctdbd to avoid the hairy recursive and async problems with
1537 everything in-line.
1538 */
1539
1540 NTSTATUS ctdbd_traverse(uint32 db_id,
1541 void (*fn)(TDB_DATA key, TDB_DATA data,
1542 void *private_data),
1543 void *private_data)
1544 {
1545 struct ctdbd_connection *conn;
1546 NTSTATUS status;
1547
1548 TDB_DATA data;
1549 struct ctdb_traverse_start t;
1550 int cstatus;
1551 struct ctdbd_traverse_state state;
1552
1553 become_root();
1554 status = ctdbd_init_connection(NULL, &conn);
1555 unbecome_root();
1556 if (!NT_STATUS_IS_OK(status)) {
1557 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1558 nt_errstr(status)));
1559 return status;
1560 }
1561
1562 t.db_id = db_id;
1563 t.srvid = conn->rand_srvid;
1564 t.reqid = ctdbd_next_reqid(conn);
1565
1566 data.dptr = (uint8_t *)&t;
1567 data.dsize = sizeof(t);
1568
1569 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1570 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1571 data, NULL, NULL, &cstatus);
1572
1573 if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1574
1575 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1576 cstatus));
1577
1578 if (NT_STATUS_IS_OK(status)) {
1579 /*
1580 * We need a mapping here
1581 */
1582 status = NT_STATUS_UNSUCCESSFUL;
1583 }
1584 goto done;
1585 }
1586
1587 state.fn = fn;
1588 state.private_data = private_data;
1589
1590 while (True) {
1591
1592 status = NT_STATUS_OK;
1593
1594 if (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
1595 ctdb_traverse_handler, &state, &status)) {
1596
1597 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1598 status = NT_STATUS_OK;
1599 break;
1600 }
1601
1602 /*
1603 * There might be more in the queue
1604 */
1605 continue;
1606 }
1607
1608 if (!NT_STATUS_IS_OK(status)) {
1609 break;
1610 }
1611
1612 status = ctdb_packet_fd_read_sync(conn->pkt);
1613
1614 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1615 /*
1616 * There might be more in the queue
1617 */
1618 continue;
1619 }
1620
1621 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1622 status = NT_STATUS_OK;
1623 break;
1624 }
1625
1626 if (!NT_STATUS_IS_OK(status)) {
1627 DEBUG(0, ("ctdb_packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1628 cluster_fatal("ctdbd died\n");
1629 }
1630 }
1631
1632 done:
1633 TALLOC_FREE(conn);
1634 return status;
1635 }
1636
1637 /*
1638 This is used to canonicalize a ctdb_sock_addr structure.
1639 */
1640 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1641 struct sockaddr_storage *out)
1642 {
1643 memcpy(out, in, sizeof (*out));
1644
1645 #ifdef HAVE_IPV6
1646 if (in->ss_family == AF_INET6) {
1647 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1648 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1649 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1650 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1651 memset(out, 0, sizeof(*out));
1652 #ifdef HAVE_SOCK_SIN_LEN
1653 out4->sin_len = sizeof(*out);
1654 #endif
1655 out4->sin_family = AF_INET;
1656 out4->sin_port = in6->sin6_port;
1657 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr[12], 4);
1658 }
1659 }
1660 #endif
1661 }
1662
1663 /*
1664 * Register us as a server for a particular tcp connection
1665 */
1666
1667 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1668 const struct sockaddr_storage *_server,
1669 const struct sockaddr_storage *_client,
1670 void (*release_ip_handler)(const char *ip_addr,
1671 void *private_data),
1672 void *private_data)
1673 {
1674 /*
1675 * we still use ctdb_control_tcp for ipv4
1676 * because we want to work against older ctdb
1677 * versions at runtime
1678 */
1679 struct ctdb_control_tcp p4;
1680 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1681 struct ctdb_control_tcp_addr p;
1682 #endif
1683 TDB_DATA data;
1684 NTSTATUS status;
1685 struct sockaddr_storage client;
1686 struct sockaddr_storage server;
1687
1688 /*
1689 * Only one connection so far
1690 */
1691 SMB_ASSERT(conn->release_ip_handler == NULL);
1692
1693 smbd_ctdb_canonicalize_ip(_client, &client);
1694 smbd_ctdb_canonicalize_ip(_server, &server);
1695
1696 switch (client.ss_family) {
1697 case AF_INET:
1698 memcpy(&p4.dest, &server, sizeof(p4.dest));
1699 memcpy(&p4.src, &client, sizeof(p4.src));
1700 data.dptr = (uint8_t *)&p4;
1701 data.dsize = sizeof(p4);
1702 break;
1703 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1704 case AF_INET6:
1705 memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
1706 memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
1707 data.dptr = (uint8_t *)&p;
1708 data.dsize = sizeof(p);
1709 break;
1710 #endif
1711 default:
1712 return NT_STATUS_INTERNAL_ERROR;
1713 }
1714
1715 conn->release_ip_handler = release_ip_handler;
1716 conn->release_ip_priv = private_data;
1717
1718 /*
1719 * We want to be told about IP releases
1720 */
1721
1722 status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1723 if (!NT_STATUS_IS_OK(status)) {
1724 return status;
1725 }
1726
1727 /*
1728 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1729 * can send an extra ack to trigger a reset for our client, so it
1730 * immediately reconnects
1731 */
1732 return ctdbd_control(conn, CTDB_CURRENT_NODE,
1733 CTDB_CONTROL_TCP_CLIENT, 0,
1734 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1735 }
1736
1737 /*
1738 * We want to handle reconfigure events
1739 */
1740 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1741 {
1742 return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1743 }
1744
1745 /*
1746 call a control on the local node
1747 */
1748 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1749 uint64_t srvid, uint32_t flags, TDB_DATA data,
1750 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1751 int *cstatus)
1752 {
1753 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1754 }
1755
1756 NTSTATUS ctdb_watch_us(struct ctdbd_connection *conn)
1757 {
1758 struct ctdb_client_notify_register reg_data;
1759 size_t struct_len;
1760 NTSTATUS status;
1761 int cstatus;
1762
1763 reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1764 reg_data.len = 1;
1765 reg_data.notify_data[0] = 0;
1766
1767 struct_len = offsetof(struct ctdb_client_notify_register,
1768 notify_data) + reg_data.len;
1769
1770 status = ctdbd_control_local(
1771 conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
1772 make_tdb_data((uint8_t *)&reg_data, struct_len),
1773 NULL, NULL, &cstatus);
1774 if (!NT_STATUS_IS_OK(status)) {
1775 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1776 nt_errstr(status)));
1777 }
1778 return status;
1779 }
1780
1781 NTSTATUS ctdb_unwatch(struct ctdbd_connection *conn)
1782 {
1783 struct ctdb_client_notify_deregister dereg_data;
1784 NTSTATUS status;
1785 int cstatus;
1786
1787 dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1788
1789 status = ctdbd_control_local(
1790 conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
1791 make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
1792 NULL, NULL, &cstatus);
1793 if (!NT_STATUS_IS_OK(status)) {
1794 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1795 nt_errstr(status)));
1796 }
1797 return status;
1798 }
1799
1800 #else
1801
1802 NTSTATUS ctdbd_messaging_send_blob(struct ctdbd_connection *conn,
1803 uint32 dst_vnn, uint64 dst_srvid,
1804 const uint8_t *buf, size_t buflen)
1805 {
1806 return NT_STATUS_NOT_IMPLEMENTED;
1807 }
1808
1809 #endif
reg import