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s4:libcli/raw: remove unused SMB_SIGNING_AUTO handling
[Samba/gebeck_regimport.git] / source3 / lib / ctdbd_conn.c
blob5c3b7c1f4f6221e730f47205e62b73fec1708a3e
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
942 results[i] = false;
943 reqids[i] = ctdbd_next_reqid(conn);
944
945 ZERO_STRUCT(req);
946
947 DEBUG(10, ("Requesting PID %d/%d, reqid=%d\n",
948 (int)pids[i].vnn, (int)pids[i].pid,
949 (int)reqids[i]));
950
951 req.hdr.length = offsetof(struct ctdb_req_control, data);
952 req.hdr.length += sizeof(pid_t);
953 req.hdr.ctdb_magic = CTDB_MAGIC;
954 req.hdr.ctdb_version = CTDB_VERSION;
955 req.hdr.operation = CTDB_REQ_CONTROL;
956 req.hdr.reqid = reqids[i];
957 req.hdr.destnode = pids[i].vnn;
958 req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
959 req.srvid = 0;
960 req.datalen = sizeof(pids[i].pid);
961 req.flags = 0;
962
963 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
964 ctdb_packet_dump(&req.hdr);
965
966 status = ctdb_packet_send(
967 conn->pkt, 2,
968 data_blob_const(
969 &req, offsetof(struct ctdb_req_control, data)),
970 data_blob_const(&pids[i].pid, sizeof(pids[i].pid)));
971 if (!NT_STATUS_IS_OK(status)) {
972 DEBUG(10, ("ctdb_packet_send failed: %s\n",
973 nt_errstr(status)));
974 goto fail;
975 }
976 }
977
978 status = ctdb_packet_flush(conn->pkt);
979 if (!NT_STATUS_IS_OK(status)) {
980 DEBUG(10, ("ctdb_packet_flush failed: %s\n",
981 nt_errstr(status)));
982 goto fail;
983 }
984
985 num_received = 0;
986
987 while (num_received < num_pids) {
988 struct ctdb_reply_control *reply = NULL;
989 uint32_t reqid;
990
991 status = ctdb_read_req(conn, 0, talloc_tos(), (void *)&reply);
992 if (!NT_STATUS_IS_OK(status)) {
993 DEBUG(10, ("ctdb_read_req failed: %s\n",
994 nt_errstr(status)));
995 goto fail;
996 }
997
998 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
999 DEBUG(10, ("Received invalid reply\n"));
1000 goto fail;
1001 }
1002
1003 reqid = reply->hdr.reqid;
1004
1005 DEBUG(10, ("Received reqid %d\n", (int)reqid));
1006
1007 for (i=0; i<num_pids; i++) {
1008 if (reqid == reqids[i]) {
1009 break;
1010 }
1011 }
1012 if (i == num_pids) {
1013 DEBUG(10, ("Received unknown record number %u\n",
1014 (unsigned)reqid));
1015 goto fail;
1016 }
1017 results[i] = ((reply->status) == 0);
1018 TALLOC_FREE(reply);
1019 num_received += 1;
1020 }
1021
1022 result = true;
1023 fail:
1024 TALLOC_FREE(frame);
1025 return result;
1026 }
1027
1028 /*
1029 * Get a db path
1030 */
1031 char *ctdbd_dbpath(struct ctdbd_connection *conn,
1032 TALLOC_CTX *mem_ctx, uint32_t db_id)
1033 {
1034 NTSTATUS status;
1035 TDB_DATA data;
1036 int32_t cstatus;
1037
1038 data.dptr = (uint8_t*)&db_id;
1039 data.dsize = sizeof(db_id);
1040
1041 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1042 CTDB_CONTROL_GETDBPATH, 0, 0, data,
1043 mem_ctx, &data, &cstatus);
1044 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1045 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
1046 return NULL;
1047 }
1048
1049 return (char *)data.dptr;
1050 }
1051
1052 /*
1053 * attach to a ctdb database
1054 */
1055 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
1056 const char *name, uint32_t *db_id, int tdb_flags)
1057 {
1058 NTSTATUS status;
1059 TDB_DATA data;
1060 int32_t cstatus;
1061 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
1062
1063 data.dptr = (uint8_t*)name;
1064 data.dsize = strlen(name)+1;
1065
1066 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1067 persistent
1068 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
1069 : CTDB_CONTROL_DB_ATTACH,
1070 tdb_flags, 0, data, NULL, &data, &cstatus);
1071 if (!NT_STATUS_IS_OK(status)) {
1072 DEBUG(0, (__location__ " ctdb_control for db_attach "
1073 "failed: %s\n", nt_errstr(status)));
1074 return status;
1075 }
1076
1077 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
1078 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
1079 return NT_STATUS_INTERNAL_ERROR;
1080 }
1081
1082 *db_id = *(uint32_t *)data.dptr;
1083 talloc_free(data.dptr);
1084
1085 if (!(tdb_flags & TDB_SEQNUM)) {
1086 return NT_STATUS_OK;
1087 }
1088
1089 data.dptr = (uint8_t *)db_id;
1090 data.dsize = sizeof(*db_id);
1091
1092 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1093 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
1094 NULL, NULL, &cstatus);
1095 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
1096 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
1097 "failed\n"));
1098 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
1099 status;
1100 }
1101
1102 return NT_STATUS_OK;
1103 }
1104
1105 /*
1106 * force the migration of a record to this node
1107 */
1108 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
1109 TDB_DATA key)
1110 {
1111 struct ctdb_req_call req;
1112 struct ctdb_reply_call *reply;
1113 NTSTATUS status;
1114
1115 ZERO_STRUCT(req);
1116
1117 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1118 req.hdr.ctdb_magic = CTDB_MAGIC;
1119 req.hdr.ctdb_version = CTDB_VERSION;
1120 req.hdr.operation = CTDB_REQ_CALL;
1121 req.hdr.reqid = ctdbd_next_reqid(conn);
1122 req.flags = CTDB_IMMEDIATE_MIGRATION;
1123 req.callid = CTDB_NULL_FUNC;
1124 req.db_id = db_id;
1125 req.keylen = key.dsize;
1126
1127 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
1128 ctdb_packet_dump(&req.hdr);
1129
1130 status = ctdb_packet_send(
1131 conn->pkt, 2,
1132 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1133 data_blob_const(key.dptr, key.dsize));
1134
1135 if (!NT_STATUS_IS_OK(status)) {
1136 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1137 return status;
1138 }
1139
1140 status = ctdb_packet_flush(conn->pkt);
1141
1142 if (!NT_STATUS_IS_OK(status)) {
1143 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1144 cluster_fatal("cluster dispatch daemon control write error\n");
1145 }
1146
1147 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1148
1149 if (!NT_STATUS_IS_OK(status)) {
1150 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1151 goto fail;
1152 }
1153
1154 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1155 DEBUG(0, ("received invalid reply\n"));
1156 status = NT_STATUS_INTERNAL_ERROR;
1157 goto fail;
1158 }
1159
1160 status = NT_STATUS_OK;
1161 fail:
1162
1163 TALLOC_FREE(reply);
1164 return status;
1165 }
1166
1167 /*
1168 * remotely fetch a record without locking it or forcing a migration
1169 */
1170 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
1171 TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
1172 {
1173 struct ctdb_req_call req;
1174 struct ctdb_reply_call *reply;
1175 NTSTATUS status;
1176
1177 ZERO_STRUCT(req);
1178
1179 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
1180 req.hdr.ctdb_magic = CTDB_MAGIC;
1181 req.hdr.ctdb_version = CTDB_VERSION;
1182 req.hdr.operation = CTDB_REQ_CALL;
1183 req.hdr.reqid = ctdbd_next_reqid(conn);
1184 req.flags = 0;
1185 req.callid = CTDB_FETCH_FUNC;
1186 req.db_id = db_id;
1187 req.keylen = key.dsize;
1188
1189 status = ctdb_packet_send(
1190 conn->pkt, 2,
1191 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
1192 data_blob_const(key.dptr, key.dsize));
1193
1194 if (!NT_STATUS_IS_OK(status)) {
1195 DEBUG(3, ("ctdb_packet_send failed: %s\n", nt_errstr(status)));
1196 return status;
1197 }
1198
1199 status = ctdb_packet_flush(conn->pkt);
1200
1201 if (!NT_STATUS_IS_OK(status)) {
1202 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
1203 cluster_fatal("cluster dispatch daemon control write error\n");
1204 }
1205
1206 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1207
1208 if (!NT_STATUS_IS_OK(status)) {
1209 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1210 goto fail;
1211 }
1212
1213 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1214 DEBUG(0, ("received invalid reply\n"));
1215 status = NT_STATUS_INTERNAL_ERROR;
1216 goto fail;
1217 }
1218
1219 data->dsize = reply->datalen;
1220 if (data->dsize == 0) {
1221 data->dptr = NULL;
1222 goto done;
1223 }
1224
1225 data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1226 reply->datalen);
1227 if (data->dptr == NULL) {
1228 DEBUG(0, ("talloc failed\n"));
1229 status = NT_STATUS_NO_MEMORY;
1230 goto fail;
1231 }
1232
1233 done:
1234 status = NT_STATUS_OK;
1235 fail:
1236 TALLOC_FREE(reply);
1237 return status;
1238 }
1239
1240 struct ctdbd_traverse_state {
1241 void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1242 void *private_data;
1243 };
1244
1245 /*
1246 * Handle a traverse record coming in on the ctdbd connection
1247 */
1248
1249 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1250 void *private_data)
1251 {
1252 struct ctdbd_traverse_state *state =
1253 (struct ctdbd_traverse_state *)private_data;
1254
1255 struct ctdb_req_message *m;
1256 struct ctdb_rec_data *d;
1257 TDB_DATA key, data;
1258
1259 m = (struct ctdb_req_message *)buf;
1260
1261 if (length < sizeof(*m) || m->hdr.length != length) {
1262 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1263 TALLOC_FREE(buf);
1264 return NT_STATUS_UNEXPECTED_IO_ERROR;
1265 }
1266
1267 d = (struct ctdb_rec_data *)&m->data[0];
1268 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1269 DEBUG(0, ("Got invalid traverse data of length %d\n",
1270 (int)m->datalen));
1271 TALLOC_FREE(buf);
1272 return NT_STATUS_UNEXPECTED_IO_ERROR;
1273 }
1274
1275 key.dsize = d->keylen;
1276 key.dptr = &d->data[0];
1277 data.dsize = d->datalen;
1278 data.dptr = &d->data[d->keylen];
1279
1280 if (key.dsize == 0 && data.dsize == 0) {
1281 /* end of traverse */
1282 return NT_STATUS_END_OF_FILE;
1283 }
1284
1285 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1286 DEBUG(0, ("Got invalid ltdb header length %d\n",
1287 (int)data.dsize));
1288 TALLOC_FREE(buf);
1289 return NT_STATUS_UNEXPECTED_IO_ERROR;
1290 }
1291 data.dsize -= sizeof(struct ctdb_ltdb_header);
1292 data.dptr += sizeof(struct ctdb_ltdb_header);
1293
1294 if (state->fn) {
1295 state->fn(key, data, state->private_data);
1296 }
1297
1298 TALLOC_FREE(buf);
1299 return NT_STATUS_OK;
1300 }
1301
1302 /*
1303 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1304 connection to ctdbd to avoid the hairy recursive and async problems with
1305 everything in-line.
1306 */
1307
1308 NTSTATUS ctdbd_traverse(uint32 db_id,
1309 void (*fn)(TDB_DATA key, TDB_DATA data,
1310 void *private_data),
1311 void *private_data)
1312 {
1313 struct ctdbd_connection *conn;
1314 NTSTATUS status;
1315
1316 TDB_DATA data;
1317 struct ctdb_traverse_start t;
1318 int cstatus;
1319 struct ctdbd_traverse_state state;
1320
1321 status = ctdbd_init_connection(NULL, &conn);
1322 if (!NT_STATUS_IS_OK(status)) {
1323 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1324 nt_errstr(status)));
1325 return status;
1326 }
1327
1328 t.db_id = db_id;
1329 t.srvid = conn->rand_srvid;
1330 t.reqid = ctdbd_next_reqid(conn);
1331
1332 data.dptr = (uint8_t *)&t;
1333 data.dsize = sizeof(t);
1334
1335 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1336 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1337 data, NULL, NULL, &cstatus);
1338
1339 if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1340
1341 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1342 cstatus));
1343
1344 if (NT_STATUS_IS_OK(status)) {
1345 /*
1346 * We need a mapping here
1347 */
1348 status = NT_STATUS_UNSUCCESSFUL;
1349 }
1350 goto done;
1351 }
1352
1353 state.fn = fn;
1354 state.private_data = private_data;
1355
1356 while (True) {
1357
1358 status = NT_STATUS_OK;
1359
1360 if (ctdb_packet_handler(conn->pkt, ctdb_req_complete,
1361 ctdb_traverse_handler, &state, &status)) {
1362
1363 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1364 status = NT_STATUS_OK;
1365 break;
1366 }
1367
1368 /*
1369 * There might be more in the queue
1370 */
1371 continue;
1372 }
1373
1374 if (!NT_STATUS_IS_OK(status)) {
1375 break;
1376 }
1377
1378 status = ctdb_packet_fd_read_sync(conn->pkt);
1379
1380 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1381 /*
1382 * There might be more in the queue
1383 */
1384 continue;
1385 }
1386
1387 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1388 status = NT_STATUS_OK;
1389 break;
1390 }
1391
1392 if (!NT_STATUS_IS_OK(status)) {
1393 DEBUG(0, ("ctdb_packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1394 cluster_fatal("ctdbd died\n");
1395 }
1396 }
1397
1398 done:
1399 TALLOC_FREE(conn);
1400 return status;
1401 }
1402
1403 /*
1404 This is used to canonicalize a ctdb_sock_addr structure.
1405 */
1406 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1407 struct sockaddr_storage *out)
1408 {
1409 memcpy(out, in, sizeof (*out));
1410
1411 #ifdef HAVE_IPV6
1412 if (in->ss_family == AF_INET6) {
1413 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1414 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1415 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1416 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1417 memset(out, 0, sizeof(*out));
1418 #ifdef HAVE_SOCK_SIN_LEN
1419 out4->sin_len = sizeof(*out);
1420 #endif
1421 out4->sin_family = AF_INET;
1422 out4->sin_port = in6->sin6_port;
1423 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1424 }
1425 }
1426 #endif
1427 }
1428
1429 /*
1430 * Register us as a server for a particular tcp connection
1431 */
1432
1433 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1434 const struct sockaddr_storage *_server,
1435 const struct sockaddr_storage *_client,
1436 void (*release_ip_handler)(const char *ip_addr,
1437 void *private_data),
1438 void *private_data)
1439 {
1440 /*
1441 * we still use ctdb_control_tcp for ipv4
1442 * because we want to work against older ctdb
1443 * versions at runtime
1444 */
1445 struct ctdb_control_tcp p4;
1446 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1447 struct ctdb_control_tcp_addr p;
1448 #endif
1449 TDB_DATA data;
1450 NTSTATUS status;
1451 struct sockaddr_storage client;
1452 struct sockaddr_storage server;
1453
1454 /*
1455 * Only one connection so far
1456 */
1457 SMB_ASSERT(conn->release_ip_handler == NULL);
1458
1459 smbd_ctdb_canonicalize_ip(_client, &client);
1460 smbd_ctdb_canonicalize_ip(_server, &server);
1461
1462 switch (client.ss_family) {
1463 case AF_INET:
1464 memcpy(&p4.dest, &server, sizeof(p4.dest));
1465 memcpy(&p4.src, &client, sizeof(p4.src));
1466 data.dptr = (uint8_t *)&p4;
1467 data.dsize = sizeof(p4);
1468 break;
1469 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1470 case AF_INET6:
1471 memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
1472 memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
1473 data.dptr = (uint8_t *)&p;
1474 data.dsize = sizeof(p);
1475 break;
1476 #endif
1477 default:
1478 return NT_STATUS_INTERNAL_ERROR;
1479 }
1480
1481 conn->release_ip_handler = release_ip_handler;
1482 conn->release_ip_priv = private_data;
1483
1484 /*
1485 * We want to be told about IP releases
1486 */
1487
1488 status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1489 if (!NT_STATUS_IS_OK(status)) {
1490 return status;
1491 }
1492
1493 /*
1494 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1495 * can send an extra ack to trigger a reset for our client, so it
1496 * immediately reconnects
1497 */
1498 return ctdbd_control(conn, CTDB_CURRENT_NODE,
1499 CTDB_CONTROL_TCP_CLIENT, 0,
1500 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1501 }
1502
1503 /*
1504 * We want to handle reconfigure events
1505 */
1506 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1507 {
1508 return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1509 }
1510
1511 /*
1512 call a control on the local node
1513 */
1514 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1515 uint64_t srvid, uint32_t flags, TDB_DATA data,
1516 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1517 int *cstatus)
1518 {
1519 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1520 }
1521
1522 NTSTATUS ctdb_watch_us(struct ctdbd_connection *conn)
1523 {
1524 struct ctdb_client_notify_register reg_data;
1525 size_t struct_len;
1526 NTSTATUS status;
1527 int cstatus;
1528
1529 reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1530 reg_data.len = 1;
1531 reg_data.notify_data[0] = 0;
1532
1533 struct_len = offsetof(struct ctdb_client_notify_register,
1534 notify_data) + reg_data.len;
1535
1536 status = ctdbd_control_local(
1537 conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
1538 make_tdb_data((uint8_t *)&reg_data, struct_len),
1539 NULL, NULL, &cstatus);
1540 if (!NT_STATUS_IS_OK(status)) {
1541 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1542 nt_errstr(status)));
1543 }
1544 return status;
1545 }
1546
1547 NTSTATUS ctdb_unwatch(struct ctdbd_connection *conn)
1548 {
1549 struct ctdb_client_notify_deregister dereg_data;
1550 NTSTATUS status;
1551 int cstatus;
1552
1553 dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
1554
1555 status = ctdbd_control_local(
1556 conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
1557 make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
1558 NULL, NULL, &cstatus);
1559 if (!NT_STATUS_IS_OK(status)) {
1560 DEBUG(1, ("ctdbd_control_local failed: %s\n",
1561 nt_errstr(status)));
1562 }
1563 return status;
1564 }
1565
1566 #endif
reg import