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s3-waf: create a smbldap.so library.
[Samba/id10ts.git] / source3 / lib / ctdbd_conn.c
blobe0bdbd05a5f0bff8abb0a82b5908084db6828450
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 "ctdb_packet.h"
28 #include "messages.h"
29
30 /*
31 * It is not possible to include ctdb.h and tdb_compat.h (included via
32 * some other include above) without warnings. This fixes those
33 * warnings.
34 */
35
36 #ifdef typesafe_cb
37 #undef typesafe_cb
38 #endif
39
40 #ifdef typesafe_cb_preargs
41 #undef typesafe_cb_preargs
42 #endif
43
44 #ifdef typesafe_cb_postargs
45 #undef typesafe_cb_postargs
46 #endif
47
48 /* paths to these include files come from --with-ctdb= in configure */
49
50 #include "ctdb.h"
51 #include "ctdb_private.h"
52
53 struct ctdbd_connection {
54 struct messaging_context *msg_ctx;
55 uint32 reqid;
56 uint32 our_vnn;
57 uint64 rand_srvid;
58 struct ctdb_packet_context *pkt;
59 struct fd_event *fde;
60
61 void (*release_ip_handler)(const char *ip_addr, void *private_data);
62 void *release_ip_priv;
63 };
64
65 static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
66 {
67 conn->reqid += 1;
68 if (conn->reqid == 0) {
69 conn->reqid += 1;
70 }
71 return conn->reqid;
72 }
73
74 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
75 uint32_t vnn, uint32 opcode,
76 uint64_t srvid, uint32_t flags, TDB_DATA data,
77 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
78 int *cstatus);
79
80 /*
81 * exit on fatal communications errors with the ctdbd daemon
82 */
83 static void cluster_fatal(const char *why)
84 {
85 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
86 /* we don't use smb_panic() as we don't want to delay to write
87 a core file. We need to release this process id immediately
88 so that someone else can take over without getting sharing
89 violations */
90 _exit(1);
91 }
92
93 /*
94 *
95 */
96 static void ctdb_packet_dump(struct ctdb_req_header *hdr)
97 {
98 if (DEBUGLEVEL < 10) {
99 return;
100 }
101 DEBUGADD(10, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
102 (int)hdr->length, (int)hdr->ctdb_magic,
103 (int)hdr->ctdb_version, (int)hdr->generation,
104 (int)hdr->operation, (int)hdr->reqid));
105 }
106
107 /*
108 * Register a srvid with ctdbd
109 */
110 static NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn,
111 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
207 if (!sockname || !*sockname) {
208 sockname = CTDB_PATH;
209 }
210
211 fd = socket(AF_UNIX, SOCK_STREAM, 0);
212 if (fd == -1) {
213 DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
214 return map_nt_error_from_unix(errno);
215 }
216
217 ZERO_STRUCT(addr);
218 addr.sun_family = AF_UNIX;
219 strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
220
221 if (sys_connect(fd, (struct sockaddr *)(void *)&addr) == -1) {
222 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
223 strerror(errno)));
224 close(fd);
225 return map_nt_error_from_unix(errno);
226 }
227
228 if (!(result = ctdb_packet_init(mem_ctx, fd))) {
229 close(fd);
230 return NT_STATUS_NO_MEMORY;
231 }
232
233 *presult = result;
234 return NT_STATUS_OK;
235 }
236
237 /*
238 * Do we have a complete ctdb packet in the queue?
239 */
240
241 static bool ctdb_req_complete(const uint8_t *buf, size_t available,
242 size_t *length,
243 void *private_data)
244 {
245 uint32 msglen;
246
247 if (available < sizeof(msglen)) {
248 return False;
249 }
250
251 msglen = *((uint32 *)buf);
252
253 DEBUG(10, ("msglen = %d\n", msglen));
254
255 if (msglen < sizeof(struct ctdb_req_header)) {
256 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
257 "the req_header\n", (int)msglen,
258 (int)sizeof(struct ctdb_req_header)));
259 cluster_fatal("ctdbd protocol error\n");
260 }
261
262 if (available < msglen) {
263 return false;
264 }
265
266 *length = msglen;
267 return true;
268 }
269
270 /*
271 * State necessary to defer an incoming message while we are waiting for a
272 * ctdb reply.
273 */
274
275 struct deferred_msg_state {
276 struct messaging_context *msg_ctx;
277 struct messaging_rec *rec;
278 };
279
280 /*
281 * Timed event handler for the deferred message
282 */
283
284 static void deferred_message_dispatch(struct event_context *event_ctx,
285 struct timed_event *te,
286 struct timeval now,
287 void *private_data)
288 {
289 struct deferred_msg_state *state = talloc_get_type_abort(
290 private_data, struct deferred_msg_state);
291
292 messaging_dispatch_rec(state->msg_ctx, state->rec);
293 TALLOC_FREE(state);
294 TALLOC_FREE(te);
295 }
296
297 struct req_pull_state {
298 TALLOC_CTX *mem_ctx;
299 DATA_BLOB req;
300 };
301
302 /*
303 * Pull a ctdb request out of the incoming ctdb_packet queue
304 */
305
306 static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
307 void *private_data)
308 {
309 struct req_pull_state *state = (struct req_pull_state *)private_data;
310
311 state->req.data = talloc_move(state->mem_ctx, &buf);
312 state->req.length = length;
313 return NT_STATUS_OK;
314 }
315
316 /*
317 * Fetch a messaging_rec from an incoming ctdb style message
318 */
319
320 static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
321 size_t overall_length,
322 struct ctdb_req_message *msg)
323 {
324 struct messaging_rec *result;
325 DATA_BLOB blob;
326 enum ndr_err_code ndr_err;
327
328 if ((overall_length < offsetof(struct ctdb_req_message, data))
329 || (overall_length
330 < offsetof(struct ctdb_req_message, data) + msg->datalen)) {
331
332 cluster_fatal("got invalid msg length");
333 }
334
335 if (!(result = talloc(mem_ctx, struct messaging_rec))) {
336 DEBUG(0, ("talloc failed\n"));
337 return NULL;
338 }
339
340 blob = data_blob_const(msg->data, msg->datalen);
341
342 ndr_err = ndr_pull_struct_blob(
343 &blob, result, result,
344 (ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
345
346 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
347 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
348 ndr_errstr(ndr_err)));
349 TALLOC_FREE(result);
350 return NULL;
351 }
352
353 if (DEBUGLEVEL >= 10) {
354 DEBUG(10, ("ctdb_pull_messaging_rec:\n"));
355 NDR_PRINT_DEBUG(messaging_rec, result);
356 }
357
358 return result;
359 }
360
361 static NTSTATUS ctdb_packet_fd_read_sync(struct ctdb_packet_context *ctx)
362 {
363 int timeout = lp_ctdb_timeout();
364
365 if (timeout == 0) {
366 timeout = -1;
367 }
368 return ctdb_packet_fd_read_sync_timeout(ctx, timeout);
369 }
370
371 /*
372 * Read a full ctdbd request. If we have a messaging context, defer incoming
373 * messages that might come in between.
374 */
375
376 static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
377 TALLOC_CTX *mem_ctx, void *result)
378 {
379 struct ctdb_req_header *hdr;
380 struct req_pull_state state;
381 NTSTATUS status;
382
383 next_pkt:
384 ZERO_STRUCT(state);
385 state.mem_ctx = mem_ctx;
386
387 while (!ctdb_packet_handler(conn->pkt, ctdb_req_complete,
388 ctdb_req_pull, &state, &status)) {
389 /*
390 * Not enough data
391 */
392 status = ctdb_packet_fd_read_sync(conn->pkt);
393
394 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
395 /* EAGAIN */
396 continue;
397 } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
398 /* EAGAIN */
399 continue;
400 }
401
402 if (!NT_STATUS_IS_OK(status)) {
403 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
404 cluster_fatal("ctdbd died\n");
405 }
406 }
407
408 if (!NT_STATUS_IS_OK(status)) {
409 DEBUG(0, ("Could not read ctdb_packet: %s\n", nt_errstr(status)));
410 cluster_fatal("ctdbd died\n");
411 }
412
413 hdr = (struct ctdb_req_header *)state.req.data;
414
415 DEBUG(10, ("Received ctdb packet\n"));
416 ctdb_packet_dump(hdr);
417
418 if (hdr->operation == CTDB_REQ_MESSAGE) {
419 struct timed_event *evt;
420 struct deferred_msg_state *msg_state;
421 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
422
423 if (conn->msg_ctx == NULL) {
424 DEBUG(1, ("Got a message without having a msg ctx, "
425 "dropping msg %llu\n",
426 (long long unsigned)msg->srvid));
427 goto next_pkt;
428 }
429
430 if ((conn->release_ip_handler != NULL)
431 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
432 /* must be dispatched immediately */
433 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
434 conn->release_ip_handler((const char *)msg->data,
435 conn->release_ip_priv);
436 TALLOC_FREE(hdr);
437 goto next_pkt;
438 }
439
440 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
441 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)) {
442
443 DEBUG(1, ("ctdb_read_req: Got %s message\n",
444 (msg->srvid == CTDB_SRVID_RECONFIGURE)
445 ? "cluster reconfigure" : "SAMBA_NOTIFY"));
446
447 messaging_send(conn->msg_ctx,
448 messaging_server_id(conn->msg_ctx),
449 MSG_SMB_BRL_VALIDATE, &data_blob_null);
450 messaging_send(conn->msg_ctx,
451 messaging_server_id(conn->msg_ctx),
452 MSG_DBWRAP_G_LOCK_RETRY,
453 &data_blob_null);
454 TALLOC_FREE(hdr);
455 goto next_pkt;
456 }
457
458 msg_state = talloc(NULL, struct deferred_msg_state);
459 if (msg_state == NULL) {
460 DEBUG(0, ("talloc failed\n"));
461 TALLOC_FREE(hdr);
462 goto next_pkt;
463 }
464
465 if (!(msg_state->rec = ctdb_pull_messaging_rec(
466 msg_state, state.req.length, msg))) {
467 DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
468 TALLOC_FREE(msg_state);
469 TALLOC_FREE(hdr);
470 goto next_pkt;
471 }
472
473 TALLOC_FREE(hdr);
474
475 msg_state->msg_ctx = conn->msg_ctx;
476
477 /*
478 * We're waiting for a call reply, but an async message has
479 * crossed. Defer dispatching to the toplevel event loop.
480 */
481 evt = event_add_timed(conn->msg_ctx->event_ctx,
482 conn->msg_ctx->event_ctx,
483 timeval_zero(),
484 deferred_message_dispatch,
485 msg_state);
486 if (evt == NULL) {
487 DEBUG(0, ("event_add_timed failed\n"));
488 TALLOC_FREE(msg_state);
489 TALLOC_FREE(hdr);
490 goto next_pkt;
491 }
492
493 goto next_pkt;
494 }
495
496 if ((reqid != 0) && (hdr->reqid != reqid)) {
497 /* we got the wrong reply */
498 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
499 "been %u\n", hdr->reqid, reqid));
500 TALLOC_FREE(hdr);
501 goto next_pkt;
502 }
503
504 *((void **)result) = talloc_move(mem_ctx, &hdr);
505
506 return NT_STATUS_OK;
507 }
508
509 /*
510 * Get us a ctdbd connection
511 */
512
513 static NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
514 struct ctdbd_connection **pconn)
515 {
516 struct ctdbd_connection *conn;
517 NTSTATUS status;
518
519 if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
520 DEBUG(0, ("talloc failed\n"));
521 return NT_STATUS_NO_MEMORY;
522 }
523
524 status = ctdbd_connect(conn, &conn->pkt);
525
526 if (!NT_STATUS_IS_OK(status)) {
527 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
528 goto fail;
529 }
530
531 status = get_cluster_vnn(conn, &conn->our_vnn);
532
533 if (!NT_STATUS_IS_OK(status)) {
534 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
535 goto fail;
536 }
537
538 if (!ctdbd_working(conn, conn->our_vnn)) {
539 DEBUG(2, ("Node is not working, can not connect\n"));
540 status = NT_STATUS_INTERNAL_DB_ERROR;
541 goto fail;
542 }
543
544 generate_random_buffer((unsigned char *)&conn->rand_srvid,
545 sizeof(conn->rand_srvid));
546
547 status = register_with_ctdbd(conn, conn->rand_srvid);
548
549 if (!NT_STATUS_IS_OK(status)) {
550 DEBUG(5, ("Could not register random srvid: %s\n",
551 nt_errstr(status)));
552 goto fail;
553 }
554
555 *pconn = conn;
556 return NT_STATUS_OK;
557
558 fail:
559 TALLOC_FREE(conn);
560 return status;
561 }
562
563 /*
564 * Get us a ctdbd connection and register us as a process
565 */
566
567 NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
568 struct ctdbd_connection **pconn)
569 {
570 struct ctdbd_connection *conn;
571 NTSTATUS status;
572
573 status = ctdbd_init_connection(mem_ctx, &conn);
574
575 if (!NT_STATUS_IS_OK(status)) {
576 return status;
577 }
578
579 status = register_with_ctdbd(conn, (uint64_t)sys_getpid());
580 if (!NT_STATUS_IS_OK(status)) {
581 goto fail;
582 }
583
584 status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
585 if (!NT_STATUS_IS_OK(status)) {
586 goto fail;
587 }
588
589 status = register_with_ctdbd(conn, CTDB_SRVID_SAMBA_NOTIFY);
590 if (!NT_STATUS_IS_OK(status)) {
591 goto fail;
592 }
593
594 *pconn = conn;
595 return NT_STATUS_OK;
596
597 fail:
598 TALLOC_FREE(conn);
599 return status;
600 }
601
602 struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
603 {
604 return conn->msg_ctx;
605 }
606
607 int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
608 {
609 return ctdb_packet_get_fd(conn->pkt);
610 }
611
612 /*
613 * Packet handler to receive and handle a ctdb message
614 */
615 static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
616 void *private_data)
617 {
618 struct ctdbd_connection *conn = talloc_get_type_abort(
619 private_data, struct ctdbd_connection);
620 struct ctdb_req_message *msg;
621 struct messaging_rec *msg_rec;
622
623 msg = (struct ctdb_req_message *)buf;
624
625 if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
626 DEBUG(0, ("Received async msg of type %u, discarding\n",
627 msg->hdr.operation));
628 TALLOC_FREE(buf);
629 return NT_STATUS_INVALID_PARAMETER;
630 }
631
632 if ((conn->release_ip_handler != NULL)
633 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
634 /* must be dispatched immediately */
635 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
636 conn->release_ip_handler((const char *)msg->data,
637 conn->release_ip_priv);
638 TALLOC_FREE(buf);
639 return NT_STATUS_OK;
640 }
641
642 SMB_ASSERT(conn->msg_ctx != NULL);
643
644 if ((msg->srvid == CTDB_SRVID_RECONFIGURE)
645 || (msg->srvid == CTDB_SRVID_SAMBA_NOTIFY)){
646 DEBUG(0,("Got cluster reconfigure message\n"));
647 /*
648 * when the cluster is reconfigured or someone of the
649 * family has passed away (SAMBA_NOTIFY), we need to
650 * clean the brl database
651 */
652 messaging_send(conn->msg_ctx,
653 messaging_server_id(conn->msg_ctx),
654 MSG_SMB_BRL_VALIDATE, &data_blob_null);
655
656 messaging_send(conn->msg_ctx,
657 messaging_server_id(conn->msg_ctx),
658 MSG_DBWRAP_G_LOCK_RETRY,
659 &data_blob_null);
660
661 TALLOC_FREE(buf);
662 return NT_STATUS_OK;
663 }
664
665 /* only messages to our pid or the broadcast are valid here */
666 if (msg->srvid != sys_getpid() && msg->srvid != MSG_SRVID_SAMBA) {
667 DEBUG(0,("Got unexpected message with srvid=%llu\n",
668 (unsigned long long)msg->srvid));
669 TALLOC_FREE(buf);
670 return NT_STATUS_OK;
671 }
672
673 if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
674 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
675 TALLOC_FREE(buf);
676 return NT_STATUS_NO_MEMORY;
677 }
678
679 messaging_dispatch_rec(conn->msg_ctx, msg_rec);
680
681 TALLOC_FREE(msg_rec);
682 TALLOC_FREE(buf);
683 return NT_STATUS_OK;
684 }
685
686 /*
687 * The ctdbd socket is readable asynchronuously
688 */
689
690 static void ctdbd_socket_handler(struct event_context *event_ctx,
691 struct fd_event *event,
692 uint16 flags,
693 void *private_data)
694 {
695 struct ctdbd_connection *conn = talloc_get_type_abort(
696 private_data, struct ctdbd_connection);
697
698 NTSTATUS status;
699
700 status = ctdb_packet_fd_read(conn->pkt);
701
702 if (!NT_STATUS_IS_OK(status)) {
703 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
704 cluster_fatal("ctdbd died\n");
705 }
706
707 while (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
708 ctdb_handle_message, conn, &status)) {
709 if (!NT_STATUS_IS_OK(status)) {
710 DEBUG(10, ("could not handle incoming message: %s\n",
711 nt_errstr(status)));
712 }
713 }
714 }
715
716 /*
717 * Prepare a ctdbd connection to receive messages
718 */
719
720 NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
721 struct messaging_context *msg_ctx)
722 {
723 SMB_ASSERT(conn->msg_ctx == NULL);
724 SMB_ASSERT(conn->fde == NULL);
725
726 if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
727 ctdb_packet_get_fd(conn->pkt),
728 EVENT_FD_READ,
729 ctdbd_socket_handler,
730 conn))) {
731 DEBUG(0, ("event_add_fd failed\n"));
732 return NT_STATUS_NO_MEMORY;
733 }
734
735 conn->msg_ctx = msg_ctx;
736
737 return NT_STATUS_OK;
738 }
739
740 /*
741 * Send a messaging message across a ctdbd
742 */
743
744 NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
745 uint32 dst_vnn, uint64 dst_srvid,
746 struct messaging_rec *msg)
747 {
748 struct ctdb_req_message r;
749 TALLOC_CTX *mem_ctx;
750 DATA_BLOB blob;
751 NTSTATUS status;
752 enum ndr_err_code ndr_err;
753
754 if (!(mem_ctx = talloc_init("ctdbd_messaging_send"))) {
755 DEBUG(0, ("talloc failed\n"));
756 return NT_STATUS_NO_MEMORY;
757 }
758
759 ndr_err = ndr_push_struct_blob(
760 &blob, mem_ctx, msg,
761 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
762
763 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
764 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
765 ndr_errstr(ndr_err)));
766 status = ndr_map_error2ntstatus(ndr_err);
767 goto fail;
768 }
769
770 r.hdr.length = offsetof(struct ctdb_req_message, data) + blob.length;
771 r.hdr.ctdb_magic = CTDB_MAGIC;
772 r.hdr.ctdb_version = CTDB_VERSION;
773 r.hdr.generation = 1;
774 r.hdr.operation = CTDB_REQ_MESSAGE;
775 r.hdr.destnode = dst_vnn;
776 r.hdr.srcnode = conn->our_vnn;
777 r.hdr.reqid = 0;
778 r.srvid = dst_srvid;
779 r.datalen = blob.length;
780
781 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
782 ctdb_packet_dump(&r.hdr);
783
784 status = ctdb_packet_send(
785 conn->pkt, 2,
786 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
787 blob);
788
789 if (!NT_STATUS_IS_OK(status)) {
790 DEBUG(0, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
791 goto fail;
792 }
793
794 status = ctdb_packet_flush(conn->pkt);
795
796 if (!NT_STATUS_IS_OK(status)) {
797 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
798 cluster_fatal("cluster dispatch daemon msg write error\n");
799 }
800
801 status = NT_STATUS_OK;
802 fail:
803 TALLOC_FREE(mem_ctx);
804 return status;
805 }
806
807 /*
808 * send/recv a generic ctdb control message
809 */
810 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
811 uint32_t vnn, uint32 opcode,
812 uint64_t srvid, uint32_t flags,
813 TDB_DATA data,
814 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
815 int *cstatus)
816 {
817 struct ctdb_req_control req;
818 struct ctdb_reply_control *reply = NULL;
819 struct ctdbd_connection *new_conn = NULL;
820 NTSTATUS status;
821
822 if (conn == NULL) {
823 status = ctdbd_init_connection(NULL, &new_conn);
824
825 if (!NT_STATUS_IS_OK(status)) {
826 DEBUG(10, ("Could not init temp connection: %s\n",
827 nt_errstr(status)));
828 goto fail;
829 }
830
831 conn = new_conn;
832 }
833
834 ZERO_STRUCT(req);
835 req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
836 req.hdr.ctdb_magic = CTDB_MAGIC;
837 req.hdr.ctdb_version = CTDB_VERSION;
838 req.hdr.operation = CTDB_REQ_CONTROL;
839 req.hdr.reqid = ctdbd_next_reqid(conn);
840 req.hdr.destnode = vnn;
841 req.opcode = opcode;
842 req.srvid = srvid;
843 req.datalen = data.dsize;
844 req.flags = flags;
845
846 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
847 ctdb_packet_dump(&req.hdr);
848
849 status = ctdb_packet_send(
850 conn->pkt, 2,
851 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
852 data_blob_const(data.dptr, data.dsize));
853
854 if (!NT_STATUS_IS_OK(status)) {
855 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
856 goto fail;
857 }
858
859 status = ctdb_packet_flush(conn->pkt);
860
861 if (!NT_STATUS_IS_OK(status)) {
862 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
863 cluster_fatal("cluster dispatch daemon control write error\n");
864 }
865
866 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
867 TALLOC_FREE(new_conn);
868 if (cstatus) {
869 *cstatus = 0;
870 }
871 return NT_STATUS_OK;
872 }
873
874 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
875
876 if (!NT_STATUS_IS_OK(status)) {
877 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
878 goto fail;
879 }
880
881 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
882 DEBUG(0, ("received invalid reply\n"));
883 goto fail;
884 }
885
886 if (outdata) {
887 if (!(outdata->dptr = (uint8 *)talloc_memdup(
888 mem_ctx, reply->data, reply->datalen))) {
889 TALLOC_FREE(reply);
890 return NT_STATUS_NO_MEMORY;
891 }
892 outdata->dsize = reply->datalen;
893 }
894 if (cstatus) {
895 (*cstatus) = reply->status;
896 }
897
898 status = NT_STATUS_OK;
899
900 fail:
901 TALLOC_FREE(new_conn);
902 TALLOC_FREE(reply);
903 return status;
904 }
905
906 /*
907 * see if a remote process exists
908 */
909 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
910 {
911 struct server_id id;
912 bool result;
913
914 id.pid = pid;
915 id.vnn = vnn;
916
917 if (!ctdb_processes_exist(conn, &id, 1, &result)) {
918 DEBUG(10, ("ctdb_processes_exist failed\n"));
919 return false;
920 }
921 return result;
922 }
923
924 bool ctdb_processes_exist(struct ctdbd_connection *conn,
925 const struct server_id *pids, int num_pids,
926 bool *results)
927 {
928 TALLOC_CTX *frame = talloc_stackframe();
929 int i, num_received;
930 NTSTATUS status;
931 uint32_t *reqids;
932 bool result = false;
933
934 reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
935 if (reqids == NULL) {
936 goto fail;
937 }
938
939 for (i=0; i<num_pids; i++) {
940 struct ctdb_req_control req;
941 pid_t pid;
942
943 results[i] = false;
944 reqids[i] = ctdbd_next_reqid(conn);
945
946 ZERO_STRUCT(req);
947
948 /*
949 * pids[i].pid is uint64_t, scale down to pid_t which
950 * is the wire protocol towards ctdb.
951 */
952 pid = pids[i].pid;
953
954 DEBUG(10, ("Requesting PID %d/%d, reqid=%d\n",
955 (int)pids[i].vnn, (int)pid,
956 (int)reqids[i]));
957
958 req.hdr.length = offsetof(struct ctdb_req_control, data);
959 req.hdr.length += sizeof(pid);
960 req.hdr.ctdb_magic = CTDB_MAGIC;
961 req.hdr.ctdb_version = CTDB_VERSION;
962 req.hdr.operation = CTDB_REQ_CONTROL;
963 req.hdr.reqid = reqids[i];
964 req.hdr.destnode = pids[i].vnn;
965 req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
966 req.srvid = 0;
967 req.datalen = sizeof(pid);
968 req.flags = 0;
969
970 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
971 ctdb_packet_dump(&req.hdr);
972
973 status = ctdb_packet_send(
974 conn->pkt, 2,
975 data_blob_const(
976 &req, offsetof(struct ctdb_req_control, data)),
977 data_blob_const(&pid, sizeof(pid)));
978 if (!NT_STATUS_IS_OK(status)) {
979 DEBUG(10, ("ctdb_packet_send failed: %s\n",
980 nt_errstr(status)));
981 goto fail;
982 }
983 }
984
985 status = ctdb_packet_flush(conn->pkt);
986 if (!NT_STATUS_IS_OK(status)) {
987 DEBUG(10, ("ctdb_packet_flush failed: %s\n",
988 nt_errstr(status)));
989 goto fail;
990 }
991
992 num_received = 0;
993
994 while (num_received < num_pids) {
995 struct ctdb_reply_control *reply = NULL;
996 uint32_t reqid;
997
998 status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
999 if (!NT_STATUS_IS_OK(status)) {
1000 DEBUG(10, ("ctdb_read_req failed: %s\n",
1001 nt_errstr(status)));
1002 goto fail;
1003 }
1004
1005 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
1006 DEBUG(10, ("Received invalid reply\n"));
1007 goto fail;
1008 }
1009
1010 reqid = reply->hdr.reqid;
1011
1012 DEBUG(10, ("Received reqid %d\n", (int)reqid));
1013
1014 for (i=0; i<num_pids; i++) {
1015 if (reqid == reqids[i]) {
1016 break;
1017 }
1018 }
1019 if (i == num_pids) {
1020 DEBUG(10, ("Received unknown record number %u\n",
1021 (unsigned)reqid));
1022 goto fail;
1023 }
1024 results[i] = ((reply->status) == 0);
1025 TALLOC_FREE(reply);
1026 num_received += 1;
1027 }
1028
1029 result = true;
1030 fail:
1031 TALLOC_FREE(frame);
1032 return result;
1033 }
1034
1035 /*
1036 * Get a db path
1037 */
1038 char *ctdbd_dbpath(struct ctdbd_connection *conn,
1039 TALLOC_CTX *mem_ctx, uint32_t db_id)
1040 {
1041 NTSTATUS status;
1042 TDB_DATA data;
1043 int32_t cstatus;
1044
1045 data.dptr = (uint8_t*)&db_id;
1046 data.dsize = sizeof(db_id);
1047
1048 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1049 CTDB_CONTROL_GETDBPATH, 0, 0, data,
1050 mem_ctx, &data, &cstatus);
1051 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1052 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
1053 return NULL;
1054 }
1055
1056 return (char *)data.dptr;
1057 }
1058
1059 /*
1060 * attach to a ctdb database
1061 */
1062 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
1063 const char *name, uint32_t *db_id, int tdb_flags)
1064 {
1065 NTSTATUS status;
1066 TDB_DATA data;
1067 int32_t cstatus;
1068 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
1069
1070 data.dptr = (uint8_t*)name;
1071 data.dsize = strlen(name)+1;
1072
1073 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1074 persistent
1075 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
1076 : CTDB_CONTROL_DB_ATTACH,
1077 tdb_flags, 0, data, NULL, &data, &cstatus);
1078 if (!NT_STATUS_IS_OK(status)) {
1079 DEBUG(0, (__location__ " ctdb_control for db_attach "
1080 "failed: %s\n", nt_errstr(status)));
1081 return status;
1082 }
1083
1084 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
1085 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
1086 return NT_STATUS_INTERNAL_ERROR;
1087 }
1088
1089 *db_id = *(uint32_t *)data.dptr;
1090 talloc_free(data.dptr);
1091
1092 if (!(tdb_flags & TDB_SEQNUM)) {
1093 return NT_STATUS_OK;
1094 }
1095
1096 data.dptr = (uint8_t *)db_id;
1097 data.dsize = sizeof(*db_id);
1098
1099 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1100 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
1101 NULL, NULL, &cstatus);
1102 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1103 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
1104 "failed\n"));
1105 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
1106 status;
1107 }
1108
1109 return NT_STATUS_OK;
1110 }
1111
1112 /*
1113 * force the migration of a record to this node
1114 */
1115 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
1116 TDB_DATA key)
1117 {
1118 struct ctdb_req_call req;
1119 struct ctdb_reply_call *reply;
1120 NTSTATUS status;
1121
1122 ZERO_STRUCT(req);
1123
1124 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1125 req.hdr.ctdb_magic = CTDB_MAGIC;
1126 req.hdr.ctdb_version = CTDB_VERSION;
1127 req.hdr.operation = CTDB_REQ_CALL;
1128 req.hdr.reqid = ctdbd_next_reqid(conn);
1129 req.flags = CTDB_IMMEDIATE_MIGRATION;
1130 req.callid = CTDB_NULL_FUNC;
1131 req.db_id = db_id;
1132 req.keylen = key.dsize;
1133
1134 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
1135 ctdb_packet_dump(&req.hdr);
1136
1137 status = ctdb_packet_send(
1138 conn->pkt, 2,
1139 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1140 data_blob_const(key.dptr, key.dsize));
1141
1142 if (!NT_STATUS_IS_OK(status)) {
1143 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1144 return status;
1145 }
1146
1147 status = ctdb_packet_flush(conn->pkt);
1148
1149 if (!NT_STATUS_IS_OK(status)) {
1150 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1151 cluster_fatal("cluster dispatch daemon control write error\n");
1152 }
1153
1154 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1155
1156 if (!NT_STATUS_IS_OK(status)) {
1157 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1158 goto fail;
1159 }
1160
1161 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1162 DEBUG(0, ("received invalid reply\n"));
1163 status = NT_STATUS_INTERNAL_ERROR;
1164 goto fail;
1165 }
1166
1167 status = NT_STATUS_OK;
1168 fail:
1169
1170 TALLOC_FREE(reply);
1171 return status;
1172 }
1173
1174 /*
1175 * remotely fetch a record without locking it or forcing a migration
1176 */
1177 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
1178 TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
1179 {
1180 struct ctdb_req_call req;
1181 struct ctdb_reply_call *reply;
1182 NTSTATUS status;
1183
1184 ZERO_STRUCT(req);
1185
1186 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1187 req.hdr.ctdb_magic = CTDB_MAGIC;
1188 req.hdr.ctdb_version = CTDB_VERSION;
1189 req.hdr.operation = CTDB_REQ_CALL;
1190 req.hdr.reqid = ctdbd_next_reqid(conn);
1191 req.flags = 0;
1192 req.callid = CTDB_FETCH_FUNC;
1193 req.db_id = db_id;
1194 req.keylen = key.dsize;
1195
1196 status = ctdb_packet_send(
1197 conn->pkt, 2,
1198 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1199 data_blob_const(key.dptr, key.dsize));
1200
1201 if (!NT_STATUS_IS_OK(status)) {
1202 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1203 return status;
1204 }
1205
1206 status = ctdb_packet_flush(conn->pkt);
1207
1208 if (!NT_STATUS_IS_OK(status)) {
1209 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1210 cluster_fatal("cluster dispatch daemon control write error\n");
1211 }
1212
1213 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1214
1215 if (!NT_STATUS_IS_OK(status)) {
1216 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1217 goto fail;
1218 }
1219
1220 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1221 DEBUG(0, ("received invalid reply\n"));
1222 status = NT_STATUS_INTERNAL_ERROR;
1223 goto fail;
1224 }
1225
1226 data->dsize = reply->datalen;
1227 if (data->dsize == 0) {
1228 data->dptr = NULL;
1229 goto done;
1230 }
1231
1232 data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1233 reply->datalen);
1234 if (data->dptr == NULL) {
1235 DEBUG(0, ("talloc failed\n"));
1236 status = NT_STATUS_NO_MEMORY;
1237 goto fail;
1238 }
1239
1240 done:
1241 status = NT_STATUS_OK;
1242 fail:
1243 TALLOC_FREE(reply);
1244 return status;
1245 }
1246
1247 struct ctdbd_traverse_state {
1248 void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1249 void *private_data;
1250 };
1251
1252 /*
1253 * Handle a traverse record coming in on the ctdbd connection
1254 */
1255
1256 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1257 void *private_data)
1258 {
1259 struct ctdbd_traverse_state *state =
1260 (struct ctdbd_traverse_state *)private_data;
1261
1262 struct ctdb_req_message *m;
1263 struct ctdb_rec_data *d;
1264 TDB_DATA key, data;
1265
1266 m = (struct ctdb_req_message *)buf;
1267
1268 if (length < sizeof(*m) || m->hdr.length != length) {
1269 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1270 TALLOC_FREE(buf);
1271 return NT_STATUS_UNEXPECTED_IO_ERROR;
1272 }
1273
1274 d = (struct ctdb_rec_data *)&m->data[0];
1275 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1276 DEBUG(0, ("Got invalid traverse data of length %d\n",
1277 (int)m->datalen));
1278 TALLOC_FREE(buf);
1279 return NT_STATUS_UNEXPECTED_IO_ERROR;
1280 }
1281
1282 key.dsize = d->keylen;
1283 key.dptr = &d->data[0];
1284 data.dsize = d->datalen;
1285 data.dptr = &d->data[d->keylen];
1286
1287 if (key.dsize == 0 && data.dsize == 0) {
1288 /* end of traverse */
1289 return NT_STATUS_END_OF_FILE;
1290 }
1291
1292 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1293 DEBUG(0, ("Got invalid ltdb header length %d\n",
1294 (int)data.dsize));
1295 TALLOC_FREE(buf);
1296 return NT_STATUS_UNEXPECTED_IO_ERROR;
1297 }
1298 data.dsize -= sizeof(struct ctdb_ltdb_header);
1299 data.dptr += sizeof(struct ctdb_ltdb_header);
1300
1301 if (state->fn) {
1302 state->fn(key, data, state->private_data);
1303 }
1304
1305 TALLOC_FREE(buf);
1306 return NT_STATUS_OK;
1307 }
1308
1309 /*
1310 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1311 connection to ctdbd to avoid the hairy recursive and async problems with
1312 everything in-line.
1313 */
1314
1315 NTSTATUS ctdbd_traverse(uint32 db_id,
1316 void (*fn)(TDB_DATA key, TDB_DATA data,
1317 void *private_data),
1318 void *private_data)
1319 {
1320 struct ctdbd_connection *conn;
1321 NTSTATUS status;
1322
1323 TDB_DATA data;
1324 struct ctdb_traverse_start t;
1325 int cstatus;
1326 struct ctdbd_traverse_state state;
1327
1328 status = ctdbd_init_connection(NULL, &conn);
1329 if (!NT_STATUS_IS_OK(status)) {
1330 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1331 nt_errstr(status)));
1332 return status;
1333 }
1334
1335 t.db_id = db_id;
1336 t.srvid = conn->rand_srvid;
1337 t.reqid = ctdbd_next_reqid(conn);
1338
1339 data.dptr = (uint8_t *)&t;
1340 data.dsize = sizeof(t);
1341
1342 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1343 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1344 data, NULL, NULL, &cstatus);
1345
1346 if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1347
1348 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1349 cstatus));
1350
1351 if (NT_STATUS_IS_OK(status)) {
1352 /*
1353 * We need a mapping here
1354 */
1355 status = NT_STATUS_UNSUCCESSFUL;
1356 }
1357 goto done;
1358 }
1359
1360 state.fn = fn;
1361 state.private_data = private_data;
1362
1363 while (True) {
1364
1365 status = NT_STATUS_OK;
1366
1367 if (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
1368 ctdb_traverse_handler, &state, &status)) {
1369
1370 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1371 status = NT_STATUS_OK;
1372 break;
1373 }
1374
1375 /*
1376 * There might be more in the queue
1377 */
1378 continue;
1379 }
1380
1381 if (!NT_STATUS_IS_OK(status)) {
1382 break;
1383 }
1384
1385 status = ctdb_packet_fd_read_sync(conn->pkt);
1386
1387 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1388 /*
1389 * There might be more in the queue
1390 */
1391 continue;
1392 }
1393
1394 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1395 status = NT_STATUS_OK;
1396 break;
1397 }
1398
1399 if (!NT_STATUS_IS_OK(status)) {
1400 DEBUG(0, ("ctdb_packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1401 cluster_fatal("ctdbd died\n");
1402 }
1403 }
1404
1405 done:
1406 TALLOC_FREE(conn);
1407 return status;
1408 }
1409
1410 /*
1411 This is used to canonicalize a ctdb_sock_addr structure.
1412 */
1413 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1414 struct sockaddr_storage *out)
1415 {
1416 memcpy(out, in, sizeof (*out));
1417
1418 #ifdef HAVE_IPV6
1419 if (in->ss_family == AF_INET6) {
1420 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1421 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1422 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1423 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1424 memset(out, 0, sizeof(*out));
1425 #ifdef HAVE_SOCK_SIN_LEN
1426 out4->sin_len = sizeof(*out);
1427 #endif
1428 out4->sin_family = AF_INET;
1429 out4->sin_port = in6->sin6_port;
1430 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1431 }
1432 }
1433 #endif
1434 }
1435
1436 /*
1437 * Register us as a server for a particular tcp connection
1438 */
1439
1440 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1441 const struct sockaddr_storage *_server,
1442 const struct sockaddr_storage *_client,
1443 void (*release_ip_handler)(const char *ip_addr,
1444 void *private_data),
1445 void *private_data)
1446 {
1447 /*
1448 * we still use ctdb_control_tcp for ipv4
1449 * because we want to work against older ctdb
1450 * versions at runtime
1451 */
1452 struct ctdb_control_tcp p4;
1453 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1454 struct ctdb_control_tcp_addr p;
1455 #endif
1456 TDB_DATA data;
1457 NTSTATUS status;
1458 struct sockaddr_storage client;
1459 struct sockaddr_storage server;
1460
1461 /*
1462 * Only one connection so far
1463 */
1464 SMB_ASSERT(conn->release_ip_handler == NULL);
1465
1466 smbd_ctdb_canonicalize_ip(_client, &client);
1467 smbd_ctdb_canonicalize_ip(_server, &server);
1468
1469 switch (client.ss_family) {
1470 case AF_INET:
1471 memcpy(&p4.dest, &server, sizeof(p4.dest));
1472 memcpy(&p4.src, &client, sizeof(p4.src));
1473 data.dptr = (uint8_t *)&p4;
1474 data.dsize = sizeof(p4);
1475 break;
1476 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1477 case AF_INET6:
1478 memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
1479 memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
1480 data.dptr = (uint8_t *)&p;
1481 data.dsize = sizeof(p);
1482 break;
1483 #endif
1484 default:
1485 return NT_STATUS_INTERNAL_ERROR;
1486 }
1487
1488 conn->release_ip_handler = release_ip_handler;
1489 conn->release_ip_priv = private_data;
1490
1491 /*
1492 * We want to be told about IP releases
1493 */
1494
1495 status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1496 if (!NT_STATUS_IS_OK(status)) {
1497 return status;
1498 }
1499
1500 /*
1501 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1502 * can send an extra ack to trigger a reset for our client, so it
1503 * immediately reconnects
1504 */
1505 return ctdbd_control(conn, CTDB_CURRENT_NODE,
1506 CTDB_CONTROL_TCP_CLIENT, 0,
1507 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1508 }
1509
1510 /*
1511 * We want to handle reconfigure events
1512 */
1513 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1514 {
1515 return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1516 }
1517
1518 /*
1519 call a control on the local node
1520 */
1521 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1522 uint64_t srvid, uint32_t flags, TDB_DATA data,
1523 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1524 int *cstatus)
1525 {
1526 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1527 }
1528
1529 NTSTATUS ctdb_watch_us(struct ctdbd_connection *conn)
1530 {
1531 struct ctdb_client_notify_register reg_data;
1532 size_t struct_len;
1533 NTSTATUS status;
1534 int cstatus;
1535
1536 reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1537 reg_data.len = 1;
1538 reg_data.notify_data[0] = 0;
1539
1540 struct_len = offsetof(struct ctdb_client_notify_register,
1541 notify_data) + reg_data.len;
1542
1543 status = ctdbd_control_local(
1544 conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
1545 make_tdb_data((uint8_t *)&reg_data, struct_len),
1546 NULL, NULL, &cstatus);
1547 if (!NT_STATUS_IS_OK(status)) {
1548 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1549 nt_errstr(status)));
1550 }
1551 return status;
1552 }
1553
1554 NTSTATUS ctdb_unwatch(struct ctdbd_connection *conn)
1555 {
1556 struct ctdb_client_notify_deregister dereg_data;
1557 NTSTATUS status;
1558 int cstatus;
1559
1560 dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1561
1562 status = ctdbd_control_local(
1563 conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
1564 make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
1565 NULL, NULL, &cstatus);
1566 if (!NT_STATUS_IS_OK(status)) {
1567 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1568 nt_errstr(status)));
1569 }
1570 return status;
1571 }
1572
1573 #endif
Working branch of Samba for id10ts