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ctdb-daemon: Make node inactive in the NODE_STOP control
[Samba.git] / ctdb / server / ctdb_recover.c
blob1654c6d3978c1c97b976d20edc4e269e7941750b
1 /*
2 ctdb recovery code
3
4 Copyright (C) Andrew Tridgell 2007
5 Copyright (C) Ronnie Sahlberg 2007
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 #include "replace.h"
21 #include "system/time.h"
22 #include "system/network.h"
23 #include "system/filesys.h"
24 #include "system/wait.h"
25
26 #include <talloc.h>
27 #include <tevent.h>
28 #include <tdb.h>
29
30 #include "lib/tdb_wrap/tdb_wrap.h"
31 #include "lib/util/dlinklist.h"
32 #include "lib/util/debug.h"
33 #include "lib/util/time.h"
34 #include "lib/util/util_process.h"
35
36 #include "ctdb_private.h"
37 #include "ctdb_client.h"
38
39 #include "common/system.h"
40 #include "common/common.h"
41 #include "common/logging.h"
42
43 #include "ctdb_cluster_mutex.h"
44
45 int
46 ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
47 {
48 struct ctdb_vnn_map_wire *map;
49 size_t len;
50
51 CHECK_CONTROL_DATA_SIZE(0);
52
53 len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*ctdb->vnn_map->size;
54 map = talloc_size(outdata, len);
55 CTDB_NO_MEMORY(ctdb, map);
56
57 map->generation = ctdb->vnn_map->generation;
58 map->size = ctdb->vnn_map->size;
59 memcpy(map->map, ctdb->vnn_map->map, sizeof(uint32_t)*map->size);
60
61 outdata->dsize = len;
62 outdata->dptr = (uint8_t *)map;
63
64 return 0;
65 }
66
67 int
68 ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
69 {
70 struct ctdb_vnn_map_wire *map = (struct ctdb_vnn_map_wire *)indata.dptr;
71
72 if (ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
73 DEBUG(DEBUG_ERR, ("Attempt to set vnnmap when not in recovery\n"));
74 return -1;
75 }
76
77 talloc_free(ctdb->vnn_map);
78
79 ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
80 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
81
82 ctdb->vnn_map->generation = map->generation;
83 ctdb->vnn_map->size = map->size;
84 ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, map->size);
85 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
86
87 memcpy(ctdb->vnn_map->map, map->map, sizeof(uint32_t)*map->size);
88
89 return 0;
90 }
91
92 int
93 ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
94 {
95 uint32_t i, len;
96 struct ctdb_db_context *ctdb_db;
97 struct ctdb_dbid_map_old *dbid_map;
98
99 CHECK_CONTROL_DATA_SIZE(0);
100
101 len = 0;
102 for(ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next){
103 len++;
104 }
105
106
107 outdata->dsize = offsetof(struct ctdb_dbid_map_old, dbs) + sizeof(dbid_map->dbs[0])*len;
108 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
109 if (!outdata->dptr) {
110 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate dbmap array\n"));
111 exit(1);
112 }
113
114 dbid_map = (struct ctdb_dbid_map_old *)outdata->dptr;
115 dbid_map->num = len;
116 for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
117 dbid_map->dbs[i].db_id = ctdb_db->db_id;
118 dbid_map->dbs[i].flags = ctdb_db->db_flags;
119 }
120
121 return 0;
122 }
123
124 int
125 ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
126 {
127 CHECK_CONTROL_DATA_SIZE(0);
128
129 outdata->dptr = (unsigned char *)ctdb_node_list_to_map(ctdb->nodes,
130 ctdb->num_nodes,
131 outdata);
132 if (outdata->dptr == NULL) {
133 return -1;
134 }
135
136 outdata->dsize = talloc_get_size(outdata->dptr);
137
138 return 0;
139 }
140
141 /*
142 reload the nodes file
143 */
144 int
145 ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
146 {
147 unsigned int i, num_nodes;
148 TALLOC_CTX *tmp_ctx;
149 struct ctdb_node **nodes;
150
151 tmp_ctx = talloc_new(ctdb);
152
153 /* steal the old nodes file for a while */
154 talloc_steal(tmp_ctx, ctdb->nodes);
155 nodes = ctdb->nodes;
156 ctdb->nodes = NULL;
157 num_nodes = ctdb->num_nodes;
158 ctdb->num_nodes = 0;
159
160 /* load the new nodes file */
161 ctdb_load_nodes_file(ctdb);
162
163 for (i=0; i<ctdb->num_nodes; i++) {
164 /* keep any identical pre-existing nodes and connections */
165 if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
166 talloc_free(ctdb->nodes[i]);
167 ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
168 continue;
169 }
170
171 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
172 continue;
173 }
174
175 /* any new or different nodes must be added */
176 if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
177 DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
178 ctdb_fatal(ctdb, "failed to add node. shutting down\n");
179 }
180 if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
181 DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
182 ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
183 }
184 }
185
186 /* tell the recovery daemon to reaload the nodes file too */
187 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
188
189 talloc_free(tmp_ctx);
190
191 return 0;
192 }
193
194 /*
195 a traverse function for pulling all relevent records from pulldb
196 */
197 struct pulldb_data {
198 struct ctdb_context *ctdb;
199 struct ctdb_db_context *ctdb_db;
200 struct ctdb_marshall_buffer *pulldata;
201 uint32_t len;
202 uint32_t allocated_len;
203 bool failed;
204 };
205
206 static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
207 {
208 struct pulldb_data *params = (struct pulldb_data *)p;
209 struct ctdb_rec_data_old *rec;
210 struct ctdb_context *ctdb = params->ctdb;
211 struct ctdb_db_context *ctdb_db = params->ctdb_db;
212
213 /* add the record to the blob */
214 rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
215 if (rec == NULL) {
216 params->failed = true;
217 return -1;
218 }
219 if (params->len + rec->length >= params->allocated_len) {
220 params->allocated_len = rec->length + params->len + ctdb->tunable.pulldb_preallocation_size;
221 params->pulldata = talloc_realloc_size(NULL, params->pulldata, params->allocated_len);
222 }
223 if (params->pulldata == NULL) {
224 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
225 ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
226 }
227 params->pulldata->count++;
228 memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
229 params->len += rec->length;
230
231 if (ctdb->tunable.db_record_size_warn != 0 && rec->length > ctdb->tunable.db_record_size_warn) {
232 DEBUG(DEBUG_ERR,("Data record in %s is big. Record size is %d bytes\n", ctdb_db->db_name, (int)rec->length));
233 }
234
235 talloc_free(rec);
236
237 return 0;
238 }
239
240 /*
241 pull a bunch of records from a ltdb, filtering by lmaster
242 */
243 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
244 {
245 struct ctdb_pulldb *pull;
246 struct ctdb_db_context *ctdb_db;
247 struct pulldb_data params;
248 struct ctdb_marshall_buffer *reply;
249
250 pull = (struct ctdb_pulldb *)indata.dptr;
251
252 ctdb_db = find_ctdb_db(ctdb, pull->db_id);
253 if (!ctdb_db) {
254 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
255 return -1;
256 }
257
258 if (!ctdb_db_frozen(ctdb_db)) {
259 DEBUG(DEBUG_ERR,
260 ("rejecting ctdb_control_pull_db when not frozen\n"));
261 return -1;
262 }
263
264 reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
265 CTDB_NO_MEMORY(ctdb, reply);
266
267 reply->db_id = pull->db_id;
268
269 params.ctdb = ctdb;
270 params.ctdb_db = ctdb_db;
271 params.pulldata = reply;
272 params.len = offsetof(struct ctdb_marshall_buffer, data);
273 params.allocated_len = params.len;
274 params.failed = false;
275
276 if (ctdb_db->unhealthy_reason) {
277 /* this is just a warning, as the tdb should be empty anyway */
278 DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
279 ctdb_db->db_name, ctdb_db->unhealthy_reason));
280 }
281
282 /* If the records are invalid, we are done */
283 if (ctdb_db->invalid_records) {
284 goto done;
285 }
286
287 if (ctdb_lockdb_mark(ctdb_db) != 0) {
288 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entire db - failing\n"));
289 return -1;
290 }
291
292 if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, &params) == -1) {
293 DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
294 ctdb_lockdb_unmark(ctdb_db);
295 talloc_free(params.pulldata);
296 return -1;
297 }
298
299 ctdb_lockdb_unmark(ctdb_db);
300
301 done:
302 outdata->dptr = (uint8_t *)params.pulldata;
303 outdata->dsize = params.len;
304
305 if (ctdb->tunable.db_record_count_warn != 0 && params.pulldata->count > ctdb->tunable.db_record_count_warn) {
306 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d records\n", ctdb_db->db_name, params.pulldata->count));
307 }
308 if (ctdb->tunable.db_size_warn != 0 && outdata->dsize > ctdb->tunable.db_size_warn) {
309 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d bytes\n", ctdb_db->db_name, (int)outdata->dsize));
310 }
311
312
313 return 0;
314 }
315
316 struct db_pull_state {
317 struct ctdb_context *ctdb;
318 struct ctdb_db_context *ctdb_db;
319 struct ctdb_marshall_buffer *recs;
320 uint32_t pnn;
321 uint64_t srvid;
322 uint32_t num_records;
323 };
324
325 static int traverse_db_pull(struct tdb_context *tdb, TDB_DATA key,
326 TDB_DATA data, void *private_data)
327 {
328 struct db_pull_state *state = (struct db_pull_state *)private_data;
329 struct ctdb_marshall_buffer *recs;
330
331 recs = ctdb_marshall_add(state->ctdb, state->recs,
332 state->ctdb_db->db_id, 0, key, NULL, data);
333 if (recs == NULL) {
334 TALLOC_FREE(state->recs);
335 return -1;
336 }
337 state->recs = recs;
338
339 if (talloc_get_size(state->recs) >=
340 state->ctdb->tunable.rec_buffer_size_limit) {
341 TDB_DATA buffer;
342 int ret;
343
344 buffer = ctdb_marshall_finish(state->recs);
345 ret = ctdb_daemon_send_message(state->ctdb, state->pnn,
346 state->srvid, buffer);
347 if (ret != 0) {
348 TALLOC_FREE(state->recs);
349 return -1;
350 }
351
352 state->num_records += state->recs->count;
353 TALLOC_FREE(state->recs);
354 }
355
356 return 0;
357 }
358
359 int32_t ctdb_control_db_pull(struct ctdb_context *ctdb,
360 struct ctdb_req_control_old *c,
361 TDB_DATA indata, TDB_DATA *outdata)
362 {
363 struct ctdb_pulldb_ext *pulldb_ext;
364 struct ctdb_db_context *ctdb_db;
365 struct db_pull_state state;
366 int ret;
367
368 pulldb_ext = (struct ctdb_pulldb_ext *)indata.dptr;
369
370 ctdb_db = find_ctdb_db(ctdb, pulldb_ext->db_id);
371 if (ctdb_db == NULL) {
372 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n",
373 pulldb_ext->db_id));
374 return -1;
375 }
376
377 if (!ctdb_db_frozen(ctdb_db)) {
378 DEBUG(DEBUG_ERR,
379 ("rejecting ctdb_control_pull_db when not frozen\n"));
380 return -1;
381 }
382
383 if (ctdb_db->unhealthy_reason) {
384 /* this is just a warning, as the tdb should be empty anyway */
385 DEBUG(DEBUG_WARNING,
386 ("db(%s) unhealty in ctdb_control_db_pull: %s\n",
387 ctdb_db->db_name, ctdb_db->unhealthy_reason));
388 }
389
390 state.ctdb = ctdb;
391 state.ctdb_db = ctdb_db;
392 state.recs = NULL;
393 state.pnn = c->hdr.srcnode;
394 state.srvid = pulldb_ext->srvid;
395 state.num_records = 0;
396
397 /* If the records are invalid, we are done */
398 if (ctdb_db->invalid_records) {
399 goto done;
400 }
401
402 if (ctdb_lockdb_mark(ctdb_db) != 0) {
403 DEBUG(DEBUG_ERR,
404 (__location__ " Failed to get lock on entire db - failing\n"));
405 return -1;
406 }
407
408 ret = tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_db_pull, &state);
409 if (ret == -1) {
410 DEBUG(DEBUG_ERR,
411 (__location__ " Failed to get traverse db '%s'\n",
412 ctdb_db->db_name));
413 ctdb_lockdb_unmark(ctdb_db);
414 return -1;
415 }
416
417 /* Last few records */
418 if (state.recs != NULL) {
419 TDB_DATA buffer;
420
421 buffer = ctdb_marshall_finish(state.recs);
422 ret = ctdb_daemon_send_message(state.ctdb, state.pnn,
423 state.srvid, buffer);
424 if (ret != 0) {
425 TALLOC_FREE(state.recs);
426 ctdb_lockdb_unmark(ctdb_db);
427 return -1;
428 }
429
430 state.num_records += state.recs->count;
431 TALLOC_FREE(state.recs);
432 }
433
434 ctdb_lockdb_unmark(ctdb_db);
435
436 done:
437 outdata->dptr = talloc_size(outdata, sizeof(uint32_t));
438 if (outdata->dptr == NULL) {
439 DEBUG(DEBUG_ERR, (__location__ " Memory allocation error\n"));
440 return -1;
441 }
442
443 memcpy(outdata->dptr, (uint8_t *)&state.num_records, sizeof(uint32_t));
444 outdata->dsize = sizeof(uint32_t);
445
446 return 0;
447 }
448
449 /*
450 push a bunch of records into a ltdb, filtering by rsn
451 */
452 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
453 {
454 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
455 struct ctdb_db_context *ctdb_db;
456 unsigned int i;
457 int ret;
458 struct ctdb_rec_data_old *rec;
459
460 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
461 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
462 return -1;
463 }
464
465 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
466 if (!ctdb_db) {
467 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
468 return -1;
469 }
470
471 if (!ctdb_db_frozen(ctdb_db)) {
472 DEBUG(DEBUG_ERR,
473 ("rejecting ctdb_control_push_db when not frozen\n"));
474 return -1;
475 }
476
477 if (ctdb_lockdb_mark(ctdb_db) != 0) {
478 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entire db - failing\n"));
479 return -1;
480 }
481
482 rec = (struct ctdb_rec_data_old *)&reply->data[0];
483
484 DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
485 reply->count, reply->db_id));
486
487 for (i=0;i<reply->count;i++) {
488 TDB_DATA key, data;
489 struct ctdb_ltdb_header *hdr;
490
491 key.dptr = &rec->data[0];
492 key.dsize = rec->keylen;
493 data.dptr = &rec->data[key.dsize];
494 data.dsize = rec->datalen;
495
496 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
497 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
498 goto failed;
499 }
500 hdr = (struct ctdb_ltdb_header *)data.dptr;
501 /* strip off any read only record flags. All readonly records
502 are revoked implicitely by a recovery
503 */
504 hdr->flags &= ~CTDB_REC_RO_FLAGS;
505
506 data.dptr += sizeof(*hdr);
507 data.dsize -= sizeof(*hdr);
508
509 ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
510 if (ret != 0) {
511 DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
512 goto failed;
513 }
514
515 rec = (struct ctdb_rec_data_old *)(rec->length + (uint8_t *)rec);
516 }
517
518 DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
519 reply->count, reply->db_id));
520
521 if (ctdb_db_readonly(ctdb_db)) {
522 DEBUG(DEBUG_CRIT,("Clearing the tracking database for dbid 0x%x\n",
523 ctdb_db->db_id));
524 if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
525 DEBUG(DEBUG_ERR,("Failed to wipe tracking database for 0x%x. Dropping read-only delegation support\n", ctdb_db->db_id));
526 tdb_close(ctdb_db->rottdb);
527 ctdb_db->rottdb = NULL;
528 ctdb_db_reset_readonly(ctdb_db);
529 }
530 while (ctdb_db->revokechild_active != NULL) {
531 talloc_free(ctdb_db->revokechild_active);
532 }
533 }
534
535 ctdb_lockdb_unmark(ctdb_db);
536 return 0;
537
538 failed:
539 ctdb_lockdb_unmark(ctdb_db);
540 return -1;
541 }
542
543 struct db_push_state {
544 struct ctdb_context *ctdb;
545 struct ctdb_db_context *ctdb_db;
546 uint64_t srvid;
547 uint32_t num_records;
548 bool failed;
549 };
550
551 static void db_push_msg_handler(uint64_t srvid, TDB_DATA indata,
552 void *private_data)
553 {
554 struct db_push_state *state = talloc_get_type(
555 private_data, struct db_push_state);
556 struct ctdb_marshall_buffer *recs;
557 struct ctdb_rec_data_old *rec;
558 unsigned int i;
559 int ret;
560
561 if (state->failed) {
562 return;
563 }
564
565 recs = (struct ctdb_marshall_buffer *)indata.dptr;
566 rec = (struct ctdb_rec_data_old *)&recs->data[0];
567
568 DEBUG(DEBUG_INFO, ("starting push of %u records for dbid 0x%x\n",
569 recs->count, recs->db_id));
570
571 for (i=0; i<recs->count; i++) {
572 TDB_DATA key, data;
573 struct ctdb_ltdb_header *hdr;
574
575 key.dptr = &rec->data[0];
576 key.dsize = rec->keylen;
577 data.dptr = &rec->data[key.dsize];
578 data.dsize = rec->datalen;
579
580 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
581 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
582 goto failed;
583 }
584
585 hdr = (struct ctdb_ltdb_header *)data.dptr;
586 /* Strip off any read only record flags.
587 * All readonly records are revoked implicitely by a recovery.
588 */
589 hdr->flags &= ~CTDB_REC_RO_FLAGS;
590
591 data.dptr += sizeof(*hdr);
592 data.dsize -= sizeof(*hdr);
593
594 ret = ctdb_ltdb_store(state->ctdb_db, key, hdr, data);
595 if (ret != 0) {
596 DEBUG(DEBUG_ERR,
597 (__location__ " Unable to store record\n"));
598 goto failed;
599 }
600
601 rec = (struct ctdb_rec_data_old *)(rec->length + (uint8_t *)rec);
602 }
603
604 DEBUG(DEBUG_DEBUG, ("finished push of %u records for dbid 0x%x\n",
605 recs->count, recs->db_id));
606
607 state->num_records += recs->count;
608 return;
609
610 failed:
611 state->failed = true;
612 }
613
614 int32_t ctdb_control_db_push_start(struct ctdb_context *ctdb, TDB_DATA indata)
615 {
616 struct ctdb_pulldb_ext *pulldb_ext;
617 struct ctdb_db_context *ctdb_db;
618 struct db_push_state *state;
619 int ret;
620
621 pulldb_ext = (struct ctdb_pulldb_ext *)indata.dptr;
622
623 ctdb_db = find_ctdb_db(ctdb, pulldb_ext->db_id);
624 if (ctdb_db == NULL) {
625 DEBUG(DEBUG_ERR,
626 (__location__ " Unknown db 0x%08x\n", pulldb_ext->db_id));
627 return -1;
628 }
629
630 if (!ctdb_db_frozen(ctdb_db)) {
631 DEBUG(DEBUG_ERR,
632 ("rejecting ctdb_control_db_push_start when not frozen\n"));
633 return -1;
634 }
635
636 if (ctdb_db->push_started) {
637 DEBUG(DEBUG_WARNING,
638 (__location__ " DB push already started for %s\n",
639 ctdb_db->db_name));
640
641 /* De-register old state */
642 state = (struct db_push_state *)ctdb_db->push_state;
643 if (state != NULL) {
644 srvid_deregister(ctdb->srv, state->srvid, state);
645 talloc_free(state);
646 ctdb_db->push_state = NULL;
647 }
648 }
649
650 state = talloc_zero(ctdb_db, struct db_push_state);
651 if (state == NULL) {
652 DEBUG(DEBUG_ERR, (__location__ " Memory allocation error\n"));
653 return -1;
654 }
655
656 state->ctdb = ctdb;
657 state->ctdb_db = ctdb_db;
658 state->srvid = pulldb_ext->srvid;
659 state->failed = false;
660
661 ret = srvid_register(ctdb->srv, state, state->srvid,
662 db_push_msg_handler, state);
663 if (ret != 0) {
664 DEBUG(DEBUG_ERR,
665 (__location__ " Failed to register srvid for db push\n"));
666 talloc_free(state);
667 return -1;
668 }
669
670 if (ctdb_lockdb_mark(ctdb_db) != 0) {
671 DEBUG(DEBUG_ERR,
672 (__location__ " Failed to get lock on entire db - failing\n"));
673 srvid_deregister(ctdb->srv, state->srvid, state);
674 talloc_free(state);
675 return -1;
676 }
677
678 ctdb_db->push_started = true;
679 ctdb_db->push_state = state;
680
681 return 0;
682 }
683
684 int32_t ctdb_control_db_push_confirm(struct ctdb_context *ctdb,
685 TDB_DATA indata, TDB_DATA *outdata)
686 {
687 uint32_t db_id;
688 struct ctdb_db_context *ctdb_db;
689 struct db_push_state *state;
690
691 db_id = *(uint32_t *)indata.dptr;
692
693 ctdb_db = find_ctdb_db(ctdb, db_id);
694 if (ctdb_db == NULL) {
695 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", db_id));
696 return -1;
697 }
698
699 if (!ctdb_db_frozen(ctdb_db)) {
700 DEBUG(DEBUG_ERR,
701 ("rejecting ctdb_control_db_push_confirm when not frozen\n"));
702 return -1;
703 }
704
705 if (!ctdb_db->push_started) {
706 DEBUG(DEBUG_ERR, (__location__ " DB push not started\n"));
707 return -1;
708 }
709
710 if (ctdb_db_readonly(ctdb_db)) {
711 DEBUG(DEBUG_ERR,
712 ("Clearing the tracking database for dbid 0x%x\n",
713 ctdb_db->db_id));
714 if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
715 DEBUG(DEBUG_ERR,
716 ("Failed to wipe tracking database for 0x%x."
717 " Dropping read-only delegation support\n",
718 ctdb_db->db_id));
719 tdb_close(ctdb_db->rottdb);
720 ctdb_db->rottdb = NULL;
721 ctdb_db_reset_readonly(ctdb_db);
722 }
723
724 while (ctdb_db->revokechild_active != NULL) {
725 talloc_free(ctdb_db->revokechild_active);
726 }
727 }
728
729 ctdb_lockdb_unmark(ctdb_db);
730
731 state = (struct db_push_state *)ctdb_db->push_state;
732 if (state == NULL) {
733 DEBUG(DEBUG_ERR, (__location__ " Missing push db state\n"));
734 return -1;
735 }
736
737 srvid_deregister(ctdb->srv, state->srvid, state);
738
739 outdata->dptr = talloc_size(outdata, sizeof(uint32_t));
740 if (outdata->dptr == NULL) {
741 DEBUG(DEBUG_ERR, (__location__ " Memory allocation error\n"));
742 talloc_free(state);
743 ctdb_db->push_state = NULL;
744 return -1;
745 }
746
747 memcpy(outdata->dptr, (uint8_t *)&state->num_records, sizeof(uint32_t));
748 outdata->dsize = sizeof(uint32_t);
749
750 talloc_free(state);
751 ctdb_db->push_started = false;
752 ctdb_db->push_state = NULL;
753
754 return 0;
755 }
756
757 struct set_recmode_state {
758 struct ctdb_context *ctdb;
759 struct ctdb_req_control_old *c;
760 };
761
762 static void set_recmode_handler(char status,
763 double latency,
764 void *private_data)
765 {
766 struct set_recmode_state *state = talloc_get_type_abort(
767 private_data, struct set_recmode_state);
768 int s = 0;
769 const char *err = NULL;
770
771 switch (status) {
772 case '0':
773 /* Mutex taken */
774 DEBUG(DEBUG_ERR,
775 ("ERROR: Daemon able to take recovery lock on \"%s\" during recovery\n",
776 state->ctdb->recovery_lock));
777 s = -1;
778 err = "Took recovery lock from daemon during recovery - probably a cluster filesystem lock coherence problem";
779 break;
780
781 case '1':
782 /* Contention */
783 DEBUG(DEBUG_DEBUG, (__location__ " Recovery lock check OK\n"));
784 state->ctdb->recovery_mode = CTDB_RECOVERY_NORMAL;
785 ctdb_process_deferred_attach(state->ctdb);
786
787 s = 0;
788
789 CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock",
790 reclock.ctdbd, latency);
791 break;
792
793 case '2':
794 /* Timeout. Consider this a success, not a failure,
795 * as we failed to set the recovery lock which is what
796 * we wanted. This can be caused by the cluster
797 * filesystem being very slow to arbitrate locks
798 * immediately after a node failure. */
799 DEBUG(DEBUG_WARNING,
800 (__location__
801 "Time out getting recovery lock, allowing recmode set anyway\n"));
802 state->ctdb->recovery_mode = CTDB_RECOVERY_NORMAL;
803 ctdb_process_deferred_attach(state->ctdb);
804
805 s = 0;
806 break;
807
808 default:
809 DEBUG(DEBUG_ERR,
810 ("Unexpected error when testing recovery lock\n"));
811 s = -1;
812 err = "Unexpected error when testing recovery lock";
813 }
814
815 ctdb_request_control_reply(state->ctdb, state->c, NULL, s, err);
816 talloc_free(state);
817 }
818
819 static void
820 ctdb_drop_all_ips_event(struct tevent_context *ev, struct tevent_timer *te,
821 struct timeval t, void *private_data)
822 {
823 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
824
825 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
826 talloc_free(ctdb->release_ips_ctx);
827 ctdb->release_ips_ctx = NULL;
828
829 ctdb_release_all_ips(ctdb);
830 }
831
832 /*
833 * Set up an event to drop all public ips if we remain in recovery for too
834 * long
835 */
836 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
837 {
838 if (ctdb->release_ips_ctx != NULL) {
839 talloc_free(ctdb->release_ips_ctx);
840 }
841 ctdb->release_ips_ctx = talloc_new(ctdb);
842 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
843
844 tevent_add_timer(ctdb->ev, ctdb->release_ips_ctx,
845 timeval_current_ofs(ctdb->tunable.recovery_drop_all_ips, 0),
846 ctdb_drop_all_ips_event, ctdb);
847 return 0;
848 }
849
850 /*
851 set the recovery mode
852 */
853 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
854 struct ctdb_req_control_old *c,
855 TDB_DATA indata, bool *async_reply,
856 const char **errormsg)
857 {
858 uint32_t recmode = *(uint32_t *)indata.dptr;
859 struct ctdb_db_context *ctdb_db;
860 struct set_recmode_state *state;
861 struct ctdb_cluster_mutex_handle *h;
862
863 if (recmode == ctdb->recovery_mode) {
864 D_INFO("Recovery mode already set to %s\n",
865 recmode == CTDB_RECOVERY_NORMAL ? "NORMAL" : "ACTIVE");
866 return 0;
867 }
868
869 D_NOTICE("Recovery mode set to %s\n",
870 recmode == CTDB_RECOVERY_NORMAL ? "NORMAL" : "ACTIVE");
871
872 /* if we enter recovery but stay in recovery for too long
873 we will eventually drop all our ip addresses
874 */
875 if (recmode == CTDB_RECOVERY_ACTIVE) {
876 if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
877 D_ERR("Failed to set up deferred drop all ips\n");
878 }
879
880 ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
881 return 0;
882 }
883
884 /* From this point: recmode == CTDB_RECOVERY_NORMAL
885 *
886 * Therefore, what follows is special handling when setting
887 * recovery mode back to normal */
888
889 TALLOC_FREE(ctdb->release_ips_ctx);
890
891 for (ctdb_db = ctdb->db_list; ctdb_db != NULL; ctdb_db = ctdb_db->next) {
892 if (ctdb_db->generation != ctdb->vnn_map->generation) {
893 DEBUG(DEBUG_ERR,
894 ("Inconsistent DB generation %u for %s\n",
895 ctdb_db->generation, ctdb_db->db_name));
896 DEBUG(DEBUG_ERR, ("Recovery mode set to ACTIVE\n"));
897 return -1;
898 }
899 }
900
901 /* force the databases to thaw */
902 if (ctdb_db_all_frozen(ctdb)) {
903 ctdb_control_thaw(ctdb, false);
904 }
905
906 if (ctdb->recovery_lock == NULL) {
907 /* Not using recovery lock file */
908 ctdb->recovery_mode = CTDB_RECOVERY_NORMAL;
909 ctdb_process_deferred_attach(ctdb);
910 return 0;
911 }
912
913 state = talloc_zero(ctdb, struct set_recmode_state);
914 if (state == NULL) {
915 DEBUG(DEBUG_ERR, (__location__ " out of memory\n"));
916 return -1;
917 }
918 state->ctdb = ctdb;
919 state->c = NULL;
920
921 h = ctdb_cluster_mutex(state, ctdb, ctdb->recovery_lock, 5,
922 set_recmode_handler, state, NULL, NULL);
923 if (h == NULL) {
924 talloc_free(state);
925 return -1;
926 }
927
928 state->c = talloc_steal(state, c);
929 *async_reply = true;
930
931 return 0;
932 }
933
934
935 /*
936 delete a record as part of the vacuum process
937 only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
938 use non-blocking locks
939
940 return 0 if the record was successfully deleted (i.e. it does not exist
941 when the function returns)
942 or !0 is the record still exists in the tdb after returning.
943 */
944 static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data_old *rec)
945 {
946 TDB_DATA key, data, data2;
947 struct ctdb_ltdb_header *hdr, *hdr2;
948
949 /* these are really internal tdb functions - but we need them here for
950 non-blocking lock of the freelist */
951 int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
952 int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
953
954
955 key.dsize = rec->keylen;
956 key.dptr = &rec->data[0];
957 data.dsize = rec->datalen;
958 data.dptr = &rec->data[rec->keylen];
959
960 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
961 DBG_INFO("Called delete on record where we are lmaster\n");
962 return -1;
963 }
964
965 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
966 DBG_ERR("Bad record size\n");
967 return -1;
968 }
969
970 hdr = (struct ctdb_ltdb_header *)data.dptr;
971
972 /* use a non-blocking lock */
973 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
974 DBG_INFO("Failed to get non-blocking chain lock\n");
975 return -1;
976 }
977
978 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
979 if (data2.dptr == NULL) {
980 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
981 return 0;
982 }
983
984 if (data2.dsize < sizeof(struct ctdb_ltdb_header)) {
985 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
986 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
987 DBG_ERR("Failed to delete corrupt record\n");
988 }
989 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
990 DBG_ERR("Deleted corrupt record\n");
991 }
992 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
993 free(data2.dptr);
994 return 0;
995 }
996
997 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
998
999 if (hdr2->rsn > hdr->rsn) {
1000 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1001 DBG_INFO("Skipping record with rsn=%llu - called with rsn=%llu\n",
1002 (unsigned long long)hdr2->rsn,
1003 (unsigned long long)hdr->rsn);
1004 free(data2.dptr);
1005 return -1;
1006 }
1007
1008 /* do not allow deleting record that have readonly flags set. */
1009 if (hdr->flags & CTDB_REC_RO_FLAGS) {
1010 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1011 DBG_INFO("Skipping record with readonly flags set\n");
1012 free(data2.dptr);
1013 return -1;
1014 }
1015 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
1016 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1017 DBG_INFO("Skipping record with readonly flags set locally\n");
1018 free(data2.dptr);
1019 return -1;
1020 }
1021
1022 if (hdr2->dmaster == ctdb->pnn) {
1023 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1024 DBG_INFO("Attempted delete record where we are the dmaster\n");
1025 free(data2.dptr);
1026 return -1;
1027 }
1028
1029 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
1030 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1031 DBG_INFO("Failed to get non-blocking freelist lock\n");
1032 free(data2.dptr);
1033 return -1;
1034 }
1035
1036 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
1037 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
1038 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1039 DBG_INFO("Failed to delete record\n");
1040 free(data2.dptr);
1041 return -1;
1042 }
1043
1044 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
1045 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1046 free(data2.dptr);
1047 return 0;
1048 }
1049
1050
1051
1052 struct recovery_callback_state {
1053 struct ctdb_req_control_old *c;
1054 };
1055
1056
1057 /*
1058 called when the 'recovered' event script has finished
1059 */
1060 static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
1061 {
1062 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
1063
1064 CTDB_INCREMENT_STAT(ctdb, num_recoveries);
1065
1066 if (status != 0) {
1067 DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
1068 if (status == -ETIMEDOUT) {
1069 ctdb_ban_self(ctdb);
1070 }
1071 }
1072
1073 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
1074 talloc_free(state);
1075
1076 gettimeofday(&ctdb->last_recovery_finished, NULL);
1077
1078 if (ctdb->runstate == CTDB_RUNSTATE_FIRST_RECOVERY) {
1079 ctdb_set_runstate(ctdb, CTDB_RUNSTATE_STARTUP);
1080 }
1081 }
1082
1083 /*
1084 recovery has finished
1085 */
1086 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
1087 struct ctdb_req_control_old *c,
1088 bool *async_reply)
1089 {
1090 int ret;
1091 struct recovery_callback_state *state;
1092
1093 DEBUG(DEBUG_ERR,("Recovery has finished\n"));
1094
1095 ctdb_persistent_finish_trans3_commits(ctdb);
1096
1097 state = talloc(ctdb, struct recovery_callback_state);
1098 CTDB_NO_MEMORY(ctdb, state);
1099
1100 state->c = c;
1101
1102 ret = ctdb_event_script_callback(ctdb, state,
1103 ctdb_end_recovery_callback,
1104 state,
1105 CTDB_EVENT_RECOVERED, "%s", "");
1106
1107 if (ret != 0) {
1108 DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
1109 talloc_free(state);
1110 return -1;
1111 }
1112
1113 /* tell the control that we will be reply asynchronously */
1114 state->c = talloc_steal(state, c);
1115 *async_reply = true;
1116 return 0;
1117 }
1118
1119 /*
1120 called when the 'startrecovery' event script has finished
1121 */
1122 static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
1123 {
1124 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
1125
1126 if (status != 0) {
1127 DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
1128 }
1129
1130 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
1131 talloc_free(state);
1132 }
1133
1134 static void run_start_recovery_event(struct ctdb_context *ctdb,
1135 struct recovery_callback_state *state)
1136 {
1137 int ret;
1138
1139 ret = ctdb_event_script_callback(ctdb, state,
1140 ctdb_start_recovery_callback,
1141 state,
1142 CTDB_EVENT_START_RECOVERY,
1143 "%s", "");
1144
1145 if (ret != 0) {
1146 DEBUG(DEBUG_ERR,("Unable to run startrecovery event\n"));
1147 ctdb_request_control_reply(ctdb, state->c, NULL, -1, NULL);
1148 talloc_free(state);
1149 return;
1150 }
1151
1152 return;
1153 }
1154
1155 static bool reclock_strings_equal(const char *a, const char *b)
1156 {
1157 return (a == NULL && b == NULL) ||
1158 (a != NULL && b != NULL && strcmp(a, b) == 0);
1159 }
1160
1161 static void start_recovery_reclock_callback(struct ctdb_context *ctdb,
1162 int32_t status,
1163 TDB_DATA data,
1164 const char *errormsg,
1165 void *private_data)
1166 {
1167 struct recovery_callback_state *state = talloc_get_type_abort(
1168 private_data, struct recovery_callback_state);
1169 const char *local = ctdb->recovery_lock;
1170 const char *remote = NULL;
1171
1172 if (status != 0) {
1173 DEBUG(DEBUG_ERR, (__location__ " GET_RECLOCK failed\n"));
1174 ctdb_request_control_reply(ctdb, state->c, NULL,
1175 status, errormsg);
1176 talloc_free(state);
1177 return;
1178 }
1179
1180 /* Check reclock consistency */
1181 if (data.dsize > 0) {
1182 /* Ensure NUL-termination */
1183 data.dptr[data.dsize-1] = '\0';
1184 remote = (const char *)data.dptr;
1185 }
1186 if (! reclock_strings_equal(local, remote)) {
1187 /* Inconsistent */
1188 ctdb_request_control_reply(ctdb, state->c, NULL, -1, NULL);
1189 DEBUG(DEBUG_ERR,
1190 ("Recovery lock configuration inconsistent: "
1191 "recmaster has %s, this node has %s, shutting down\n",
1192 remote == NULL ? "NULL" : remote,
1193 local == NULL ? "NULL" : local));
1194 talloc_free(state);
1195 ctdb_shutdown_sequence(ctdb, 1);
1196 }
1197 DEBUG(DEBUG_INFO,
1198 ("Recovery lock consistency check successful\n"));
1199
1200 run_start_recovery_event(ctdb, state);
1201 }
1202
1203 /* Check recovery lock consistency and run eventscripts for the
1204 * "startrecovery" event */
1205 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
1206 struct ctdb_req_control_old *c,
1207 bool *async_reply)
1208 {
1209 int ret;
1210 struct recovery_callback_state *state;
1211 uint32_t recmaster = c->hdr.srcnode;
1212
1213 DEBUG(DEBUG_ERR, ("Recovery has started\n"));
1214 gettimeofday(&ctdb->last_recovery_started, NULL);
1215
1216 state = talloc(ctdb, struct recovery_callback_state);
1217 CTDB_NO_MEMORY(ctdb, state);
1218
1219 state->c = c;
1220
1221 /* Although the recovery master sent this node a start
1222 * recovery control, this node might still think the recovery
1223 * master is disconnected. In this case defer the recovery
1224 * lock consistency check. */
1225 if (ctdb->nodes[recmaster]->flags & NODE_FLAGS_DISCONNECTED) {
1226 run_start_recovery_event(ctdb, state);
1227 } else {
1228 /* Ask the recovery master about its reclock setting */
1229 ret = ctdb_daemon_send_control(ctdb,
1230 recmaster,
1231 0,
1232 CTDB_CONTROL_GET_RECLOCK_FILE,
1233 0, 0,
1234 tdb_null,
1235 start_recovery_reclock_callback,
1236 state);
1237
1238 if (ret != 0) {
1239 DEBUG(DEBUG_ERR, (__location__ " GET_RECLOCK failed\n"));
1240 talloc_free(state);
1241 return -1;
1242 }
1243 }
1244
1245 /* tell the control that we will be reply asynchronously */
1246 state->c = talloc_steal(state, c);
1247 *async_reply = true;
1248
1249 return 0;
1250 }
1251
1252 /*
1253 try to delete all these records as part of the vacuuming process
1254 and return the records we failed to delete
1255 */
1256 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1257 {
1258 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1259 struct ctdb_db_context *ctdb_db;
1260 unsigned int i;
1261 struct ctdb_rec_data_old *rec;
1262 struct ctdb_marshall_buffer *records;
1263
1264 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1265 DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
1266 return -1;
1267 }
1268
1269 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1270 if (!ctdb_db) {
1271 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
1272 return -1;
1273 }
1274
1275
1276 DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
1277 reply->count, reply->db_id));
1278
1279
1280 /* create a blob to send back the records we couldnt delete */
1281 records = (struct ctdb_marshall_buffer *)
1282 talloc_zero_size(outdata,
1283 offsetof(struct ctdb_marshall_buffer, data));
1284 if (records == NULL) {
1285 DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
1286 return -1;
1287 }
1288 records->db_id = ctdb_db->db_id;
1289
1290
1291 rec = (struct ctdb_rec_data_old *)&reply->data[0];
1292 for (i=0;i<reply->count;i++) {
1293 TDB_DATA key, data;
1294
1295 key.dptr = &rec->data[0];
1296 key.dsize = rec->keylen;
1297 data.dptr = &rec->data[key.dsize];
1298 data.dsize = rec->datalen;
1299
1300 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1301 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
1302 talloc_free(records);
1303 return -1;
1304 }
1305
1306 /* If we cant delete the record we must add it to the reply
1307 so the lmaster knows it may not purge this record
1308 */
1309 if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
1310 size_t old_size;
1311 struct ctdb_ltdb_header *hdr;
1312
1313 hdr = (struct ctdb_ltdb_header *)data.dptr;
1314 data.dptr += sizeof(*hdr);
1315 data.dsize -= sizeof(*hdr);
1316
1317 DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
1318
1319 old_size = talloc_get_size(records);
1320 records = talloc_realloc_size(outdata, records, old_size + rec->length);
1321 if (records == NULL) {
1322 DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
1323 return -1;
1324 }
1325 records->count++;
1326 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1327 }
1328
1329 rec = (struct ctdb_rec_data_old *)(rec->length + (uint8_t *)rec);
1330 }
1331
1332
1333 *outdata = ctdb_marshall_finish(records);
1334
1335 return 0;
1336 }
1337
1338 /*
1339 report capabilities
1340 */
1341 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1342 {
1343 uint32_t *capabilities = NULL;
1344
1345 capabilities = talloc(outdata, uint32_t);
1346 CTDB_NO_MEMORY(ctdb, capabilities);
1347 *capabilities = ctdb->capabilities;
1348
1349 outdata->dsize = sizeof(uint32_t);
1350 outdata->dptr = (uint8_t *)capabilities;
1351
1352 return 0;
1353 }
1354
1355 /* The recovery daemon will ping us at regular intervals.
1356 If we havent been pinged for a while we assume the recovery
1357 daemon is inoperable and we restart.
1358 */
1359 static void ctdb_recd_ping_timeout(struct tevent_context *ev,
1360 struct tevent_timer *te,
1361 struct timeval t, void *p)
1362 {
1363 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1364 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1365
1366 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1367
1368 if (*count < ctdb->tunable.recd_ping_failcount) {
1369 (*count)++;
1370 tevent_add_timer(ctdb->ev, ctdb->recd_ping_count,
1371 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1372 ctdb_recd_ping_timeout, ctdb);
1373 return;
1374 }
1375
1376 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
1377
1378 ctdb_stop_recoverd(ctdb);
1379 ctdb_start_recoverd(ctdb);
1380 }
1381
1382 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1383 {
1384 talloc_free(ctdb->recd_ping_count);
1385
1386 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1387 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1388
1389 if (ctdb->tunable.recd_ping_timeout != 0) {
1390 tevent_add_timer(ctdb->ev, ctdb->recd_ping_count,
1391 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1392 ctdb_recd_ping_timeout, ctdb);
1393 }
1394
1395 return 0;
1396 }
1397
1398
1399
1400 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1401 {
1402 uint32_t new_recmaster;
1403
1404 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1405 new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
1406
1407 if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
1408 DEBUG(DEBUG_ERR,
1409 ("Remote node (%u) is now the recovery master\n",
1410 new_recmaster));
1411 }
1412
1413 if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
1414 DEBUG(DEBUG_ERR,
1415 ("This node (%u) is now the recovery master\n",
1416 ctdb->pnn));
1417 }
1418
1419 ctdb->recovery_master = new_recmaster;
1420 return 0;
1421 }
1422
1423 void ctdb_node_become_inactive(struct ctdb_context *ctdb)
1424 {
1425 struct ctdb_db_context *ctdb_db;
1426
1427 D_WARNING("Making node INACTIVE\n");
1428
1429 /*
1430 * Do not service database calls - reset generation to invalid
1431 * so this node ignores any REQ/REPLY CALL/DMASTER
1432 */
1433 ctdb->vnn_map->generation = INVALID_GENERATION;
1434 for (ctdb_db = ctdb->db_list; ctdb_db != NULL; ctdb_db = ctdb_db->next) {
1435 ctdb_db->generation = INVALID_GENERATION;
1436 }
1437
1438 /*
1439 * Although this bypasses the control, the only thing missing
1440 * is the deferred drop of all public IPs, which isn't
1441 * necessary because they are dropped below
1442 */
1443 if (ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
1444 D_NOTICE("Recovery mode set to ACTIVE\n");
1445 ctdb->recovery_mode = CTDB_RECOVERY_ACTIVE;
1446 }
1447
1448 /*
1449 * Initiate database freeze - this will be scheduled for
1450 * immediate execution and will be in progress long before the
1451 * calling control returns
1452 */
1453 ctdb_daemon_send_control(ctdb,
1454 ctdb->pnn,
1455 0,
1456 CTDB_CONTROL_FREEZE,
1457 0,
1458 CTDB_CTRL_FLAG_NOREPLY,
1459 tdb_null,
1460 NULL,
1461 NULL);
1462
1463 D_NOTICE("Dropping all public IP addresses\n");
1464 ctdb_release_all_ips(ctdb);
1465 }
1466
1467 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
1468 {
1469 DEBUG(DEBUG_ERR, ("Stopping node\n"));
1470 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1471
1472 ctdb_node_become_inactive(ctdb);
1473
1474 return 0;
1475 }
1476
1477 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1478 {
1479 DEBUG(DEBUG_ERR, ("Continue node\n"));
1480 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1481
1482 return 0;
1483 }
1484
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