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ctdb-recoverd: Improve error messages on recovery lock coherence fail
[Samba.git] / ctdb / server / ctdb_recover.c
blob4b9407f6c8e787588ef2c6b22495417edf2cd9c1
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 "includes.h"
21 #include "tdb.h"
22 #include "system/time.h"
23 #include "system/network.h"
24 #include "system/filesys.h"
25 #include "system/wait.h"
26 #include "../include/ctdb_private.h"
27 #include "lib/util/dlinklist.h"
28 #include "lib/tdb_wrap/tdb_wrap.h"
29
30
31 int
32 ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
33 {
34 struct ctdb_vnn_map_wire *map;
35 size_t len;
36
37 CHECK_CONTROL_DATA_SIZE(0);
38
39 len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*ctdb->vnn_map->size;
40 map = talloc_size(outdata, len);
41 CTDB_NO_MEMORY(ctdb, map);
42
43 map->generation = ctdb->vnn_map->generation;
44 map->size = ctdb->vnn_map->size;
45 memcpy(map->map, ctdb->vnn_map->map, sizeof(uint32_t)*map->size);
46
47 outdata->dsize = len;
48 outdata->dptr = (uint8_t *)map;
49
50 return 0;
51 }
52
53 int
54 ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
55 {
56 struct ctdb_vnn_map_wire *map = (struct ctdb_vnn_map_wire *)indata.dptr;
57 int i;
58
59 for(i=1; i<=NUM_DB_PRIORITIES; i++) {
60 if (ctdb->freeze_mode[i] != CTDB_FREEZE_FROZEN) {
61 DEBUG(DEBUG_ERR,("Attempt to set vnnmap when not frozen\n"));
62 return -1;
63 }
64 }
65
66 talloc_free(ctdb->vnn_map);
67
68 ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
69 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
70
71 ctdb->vnn_map->generation = map->generation;
72 ctdb->vnn_map->size = map->size;
73 ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, map->size);
74 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
75
76 memcpy(ctdb->vnn_map->map, map->map, sizeof(uint32_t)*map->size);
77
78 return 0;
79 }
80
81 int
82 ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
83 {
84 uint32_t i, len;
85 struct ctdb_db_context *ctdb_db;
86 struct ctdb_dbid_map *dbid_map;
87
88 CHECK_CONTROL_DATA_SIZE(0);
89
90 len = 0;
91 for(ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next){
92 len++;
93 }
94
95
96 outdata->dsize = offsetof(struct ctdb_dbid_map, dbs) + sizeof(dbid_map->dbs[0])*len;
97 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
98 if (!outdata->dptr) {
99 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate dbmap array\n"));
100 exit(1);
101 }
102
103 dbid_map = (struct ctdb_dbid_map *)outdata->dptr;
104 dbid_map->num = len;
105 for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
106 dbid_map->dbs[i].dbid = ctdb_db->db_id;
107 if (ctdb_db->persistent != 0) {
108 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_PERSISTENT;
109 }
110 if (ctdb_db->readonly != 0) {
111 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_READONLY;
112 }
113 if (ctdb_db->sticky != 0) {
114 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_STICKY;
115 }
116 }
117
118 return 0;
119 }
120
121 int
122 ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
123 {
124 uint32_t i, num_nodes;
125 struct ctdb_node_map *node_map;
126
127 CHECK_CONTROL_DATA_SIZE(0);
128
129 num_nodes = ctdb->num_nodes;
130
131 outdata->dsize = offsetof(struct ctdb_node_map, nodes) + num_nodes*sizeof(struct ctdb_node_and_flags);
132 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
133 if (!outdata->dptr) {
134 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
135 exit(1);
136 }
137
138 node_map = (struct ctdb_node_map *)outdata->dptr;
139 node_map->num = num_nodes;
140 for (i=0; i<num_nodes; i++) {
141 if (parse_ip(ctdb->nodes[i]->address.address,
142 NULL, /* TODO: pass in the correct interface here*/
143 0,
144 &node_map->nodes[i].addr) == 0)
145 {
146 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
147 }
148
149 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
150 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
151 }
152
153 return 0;
154 }
155
156 /*
157 get an old style ipv4-only nodemap
158 */
159 int
160 ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
161 {
162 uint32_t i, num_nodes;
163 struct ctdb_node_mapv4 *node_map;
164
165 CHECK_CONTROL_DATA_SIZE(0);
166
167 num_nodes = ctdb->num_nodes;
168
169 outdata->dsize = offsetof(struct ctdb_node_mapv4, nodes) + num_nodes*sizeof(struct ctdb_node_and_flagsv4);
170 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
171 if (!outdata->dptr) {
172 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
173 exit(1);
174 }
175
176 node_map = (struct ctdb_node_mapv4 *)outdata->dptr;
177 node_map->num = num_nodes;
178 for (i=0; i<num_nodes; i++) {
179 if (parse_ipv4(ctdb->nodes[i]->address.address, 0, &node_map->nodes[i].sin) == 0) {
180 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
181 return -1;
182 }
183
184 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
185 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
186 }
187
188 return 0;
189 }
190
191 static void
192 ctdb_reload_nodes_event(struct event_context *ev, struct timed_event *te,
193 struct timeval t, void *private_data)
194 {
195 int i, num_nodes;
196 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
197 TALLOC_CTX *tmp_ctx;
198 struct ctdb_node **nodes;
199
200 tmp_ctx = talloc_new(ctdb);
201
202 /* steal the old nodes file for a while */
203 talloc_steal(tmp_ctx, ctdb->nodes);
204 nodes = ctdb->nodes;
205 ctdb->nodes = NULL;
206 num_nodes = ctdb->num_nodes;
207 ctdb->num_nodes = 0;
208
209 /* load the new nodes file */
210 ctdb_load_nodes_file(ctdb);
211
212 for (i=0; i<ctdb->num_nodes; i++) {
213 /* keep any identical pre-existing nodes and connections */
214 if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
215 talloc_free(ctdb->nodes[i]);
216 ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
217 continue;
218 }
219
220 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
221 continue;
222 }
223
224 /* any new or different nodes must be added */
225 if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
226 DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
227 ctdb_fatal(ctdb, "failed to add node. shutting down\n");
228 }
229 if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
230 DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
231 ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
232 }
233 }
234
235 /* tell the recovery daemon to reaload the nodes file too */
236 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
237
238 talloc_free(tmp_ctx);
239 return;
240 }
241
242 /*
243 reload the nodes file after a short delay (so that we can send the response
244 back first
245 */
246 int
247 ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
248 {
249 event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(1,0), ctdb_reload_nodes_event, ctdb);
250
251 return 0;
252 }
253
254 /*
255 a traverse function for pulling all relevent records from pulldb
256 */
257 struct pulldb_data {
258 struct ctdb_context *ctdb;
259 struct ctdb_db_context *ctdb_db;
260 struct ctdb_marshall_buffer *pulldata;
261 uint32_t len;
262 uint32_t allocated_len;
263 bool failed;
264 };
265
266 static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
267 {
268 struct pulldb_data *params = (struct pulldb_data *)p;
269 struct ctdb_rec_data *rec;
270 struct ctdb_context *ctdb = params->ctdb;
271 struct ctdb_db_context *ctdb_db = params->ctdb_db;
272
273 /* add the record to the blob */
274 rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
275 if (rec == NULL) {
276 params->failed = true;
277 return -1;
278 }
279 if (params->len + rec->length >= params->allocated_len) {
280 params->allocated_len = rec->length + params->len + ctdb->tunable.pulldb_preallocation_size;
281 params->pulldata = talloc_realloc_size(NULL, params->pulldata, params->allocated_len);
282 }
283 if (params->pulldata == NULL) {
284 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
285 ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
286 }
287 params->pulldata->count++;
288 memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
289 params->len += rec->length;
290
291 if (ctdb->tunable.db_record_size_warn != 0 && rec->length > ctdb->tunable.db_record_size_warn) {
292 DEBUG(DEBUG_ERR,("Data record in %s is big. Record size is %d bytes\n", ctdb_db->db_name, (int)rec->length));
293 }
294
295 talloc_free(rec);
296
297 return 0;
298 }
299
300 /*
301 pull a bunch of records from a ltdb, filtering by lmaster
302 */
303 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
304 {
305 struct ctdb_control_pulldb *pull;
306 struct ctdb_db_context *ctdb_db;
307 struct pulldb_data params;
308 struct ctdb_marshall_buffer *reply;
309
310 pull = (struct ctdb_control_pulldb *)indata.dptr;
311
312 ctdb_db = find_ctdb_db(ctdb, pull->db_id);
313 if (!ctdb_db) {
314 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
315 return -1;
316 }
317
318 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
319 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_pull_db when not frozen\n"));
320 return -1;
321 }
322
323 reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
324 CTDB_NO_MEMORY(ctdb, reply);
325
326 reply->db_id = pull->db_id;
327
328 params.ctdb = ctdb;
329 params.ctdb_db = ctdb_db;
330 params.pulldata = reply;
331 params.len = offsetof(struct ctdb_marshall_buffer, data);
332 params.allocated_len = params.len;
333 params.failed = false;
334
335 if (ctdb_db->unhealthy_reason) {
336 /* this is just a warning, as the tdb should be empty anyway */
337 DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
338 ctdb_db->db_name, ctdb_db->unhealthy_reason));
339 }
340
341 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
342 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
343 return -1;
344 }
345
346 if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, &params) == -1) {
347 DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
348 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
349 talloc_free(params.pulldata);
350 return -1;
351 }
352
353 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
354
355 outdata->dptr = (uint8_t *)params.pulldata;
356 outdata->dsize = params.len;
357
358 if (ctdb->tunable.db_record_count_warn != 0 && params.pulldata->count > ctdb->tunable.db_record_count_warn) {
359 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d records\n", ctdb_db->db_name, params.pulldata->count));
360 }
361 if (ctdb->tunable.db_size_warn != 0 && outdata->dsize > ctdb->tunable.db_size_warn) {
362 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d bytes\n", ctdb_db->db_name, (int)outdata->dsize));
363 }
364
365
366 return 0;
367 }
368
369 /*
370 push a bunch of records into a ltdb, filtering by rsn
371 */
372 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
373 {
374 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
375 struct ctdb_db_context *ctdb_db;
376 int i, ret;
377 struct ctdb_rec_data *rec;
378
379 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
380 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
381 return -1;
382 }
383
384 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
385 if (!ctdb_db) {
386 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
387 return -1;
388 }
389
390 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
391 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_push_db when not frozen\n"));
392 return -1;
393 }
394
395 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
396 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
397 return -1;
398 }
399
400 rec = (struct ctdb_rec_data *)&reply->data[0];
401
402 DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
403 reply->count, reply->db_id));
404
405 for (i=0;i<reply->count;i++) {
406 TDB_DATA key, data;
407 struct ctdb_ltdb_header *hdr;
408
409 key.dptr = &rec->data[0];
410 key.dsize = rec->keylen;
411 data.dptr = &rec->data[key.dsize];
412 data.dsize = rec->datalen;
413
414 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
415 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
416 goto failed;
417 }
418 hdr = (struct ctdb_ltdb_header *)data.dptr;
419 /* strip off any read only record flags. All readonly records
420 are revoked implicitely by a recovery
421 */
422 hdr->flags &= ~CTDB_REC_RO_FLAGS;
423
424 data.dptr += sizeof(*hdr);
425 data.dsize -= sizeof(*hdr);
426
427 ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
428 if (ret != 0) {
429 DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
430 goto failed;
431 }
432
433 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
434 }
435
436 DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
437 reply->count, reply->db_id));
438
439 if (ctdb_db->readonly) {
440 DEBUG(DEBUG_CRIT,("Clearing the tracking database for dbid 0x%x\n",
441 ctdb_db->db_id));
442 if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
443 DEBUG(DEBUG_ERR,("Failed to wipe tracking database for 0x%x. Dropping read-only delegation support\n", ctdb_db->db_id));
444 ctdb_db->readonly = false;
445 tdb_close(ctdb_db->rottdb);
446 ctdb_db->rottdb = NULL;
447 ctdb_db->readonly = false;
448 }
449 while (ctdb_db->revokechild_active != NULL) {
450 talloc_free(ctdb_db->revokechild_active);
451 }
452 }
453
454 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
455 return 0;
456
457 failed:
458 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
459 return -1;
460 }
461
462 struct ctdb_set_recmode_state {
463 struct ctdb_context *ctdb;
464 struct ctdb_req_control *c;
465 uint32_t recmode;
466 int fd[2];
467 struct timed_event *te;
468 struct fd_event *fde;
469 pid_t child;
470 struct timeval start_time;
471 };
472
473 /*
474 called if our set_recmode child times out. this would happen if
475 ctdb_recovery_lock() would block.
476 */
477 static void ctdb_set_recmode_timeout(struct event_context *ev, struct timed_event *te,
478 struct timeval t, void *private_data)
479 {
480 struct ctdb_set_recmode_state *state = talloc_get_type(private_data,
481 struct ctdb_set_recmode_state);
482
483 /* we consider this a success, not a failure, as we failed to
484 set the recovery lock which is what we wanted. This can be
485 caused by the cluster filesystem being very slow to
486 arbitrate locks immediately after a node failure.
487 */
488 DEBUG(DEBUG_ERR,(__location__ " set_recmode child process hung/timedout CFS slow to grant locks? (allowing recmode set anyway)\n"));
489 state->ctdb->recovery_mode = state->recmode;
490 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
491 talloc_free(state);
492 }
493
494
495 /* when we free the recmode state we must kill any child process.
496 */
497 static int set_recmode_destructor(struct ctdb_set_recmode_state *state)
498 {
499 double l = timeval_elapsed(&state->start_time);
500
501 CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock", reclock.ctdbd, l);
502
503 if (state->fd[0] != -1) {
504 state->fd[0] = -1;
505 }
506 if (state->fd[1] != -1) {
507 state->fd[1] = -1;
508 }
509 ctdb_kill(state->ctdb, state->child, SIGKILL);
510 return 0;
511 }
512
513 /* this is called when the client process has completed ctdb_recovery_lock()
514 and has written data back to us through the pipe.
515 */
516 static void set_recmode_handler(struct event_context *ev, struct fd_event *fde,
517 uint16_t flags, void *private_data)
518 {
519 struct ctdb_set_recmode_state *state= talloc_get_type(private_data,
520 struct ctdb_set_recmode_state);
521 char c = 0;
522 int ret;
523
524 /* we got a response from our child process so we can abort the
525 timeout.
526 */
527 talloc_free(state->te);
528 state->te = NULL;
529
530
531 /* If, as expected, the child was unable to take the recovery
532 * lock then it will have written 0 into the pipe, so
533 * continue. However, any other value (e.g. 1) indicates that
534 * it was able to take the recovery lock when it should have
535 * been held by the recovery daemon on the recovery master.
536 */
537 ret = sys_read(state->fd[0], &c, 1);
538 if (ret != 1 || c != 0) {
539 ctdb_request_control_reply(
540 state->ctdb, state->c, NULL, -1,
541 "Took recovery lock from daemon during recovery - probably a cluster filesystem lock coherence problem");
542 talloc_free(state);
543 return;
544 }
545
546 state->ctdb->recovery_mode = state->recmode;
547
548 /* release any deferred attach calls from clients */
549 if (state->recmode == CTDB_RECOVERY_NORMAL) {
550 ctdb_process_deferred_attach(state->ctdb);
551 }
552
553 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
554 talloc_free(state);
555 return;
556 }
557
558 static void
559 ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te,
560 struct timeval t, void *private_data)
561 {
562 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
563
564 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
565 talloc_free(ctdb->release_ips_ctx);
566 ctdb->release_ips_ctx = NULL;
567
568 ctdb_release_all_ips(ctdb);
569 }
570
571 /*
572 * Set up an event to drop all public ips if we remain in recovery for too
573 * long
574 */
575 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
576 {
577 if (ctdb->release_ips_ctx != NULL) {
578 talloc_free(ctdb->release_ips_ctx);
579 }
580 ctdb->release_ips_ctx = talloc_new(ctdb);
581 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
582
583 event_add_timed(ctdb->ev, ctdb->release_ips_ctx, timeval_current_ofs(ctdb->tunable.recovery_drop_all_ips, 0), ctdb_drop_all_ips_event, ctdb);
584 return 0;
585 }
586
587 /*
588 set the recovery mode
589 */
590 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
591 struct ctdb_req_control *c,
592 TDB_DATA indata, bool *async_reply,
593 const char **errormsg)
594 {
595 uint32_t recmode = *(uint32_t *)indata.dptr;
596 int i, ret;
597 struct ctdb_set_recmode_state *state;
598 pid_t parent = getpid();
599
600 /* if we enter recovery but stay in recovery for too long
601 we will eventually drop all our ip addresses
602 */
603 if (recmode == CTDB_RECOVERY_NORMAL) {
604 talloc_free(ctdb->release_ips_ctx);
605 ctdb->release_ips_ctx = NULL;
606 } else {
607 if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
608 DEBUG(DEBUG_ERR,("Failed to set up deferred drop all ips\n"));
609 }
610 }
611
612 if (recmode != ctdb->recovery_mode) {
613 DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n",
614 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
615 }
616
617 if (recmode != CTDB_RECOVERY_NORMAL ||
618 ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
619 ctdb->recovery_mode = recmode;
620 return 0;
621 }
622
623 /* some special handling when ending recovery mode */
624
625 /* force the databases to thaw */
626 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
627 if (ctdb->freeze_handles[i] != NULL) {
628 ctdb_control_thaw(ctdb, i, false);
629 }
630 }
631
632 state = talloc(ctdb, struct ctdb_set_recmode_state);
633 CTDB_NO_MEMORY(ctdb, state);
634
635 state->start_time = timeval_current();
636 state->fd[0] = -1;
637 state->fd[1] = -1;
638
639 /* release any deferred attach calls from clients */
640 if (recmode == CTDB_RECOVERY_NORMAL) {
641 ctdb_process_deferred_attach(ctdb);
642 }
643
644 if (ctdb->recovery_lock_file == NULL) {
645 /* Not using recovery lock file */
646 ctdb->recovery_mode = recmode;
647 return 0;
648 }
649
650 /* For the rest of what needs to be done, we need to do this in
651 a child process since
652 1, the call to ctdb_recovery_lock() can block if the cluster
653 filesystem is in the process of recovery.
654 */
655 ret = pipe(state->fd);
656 if (ret != 0) {
657 talloc_free(state);
658 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
659 return -1;
660 }
661
662 state->child = ctdb_fork(ctdb);
663 if (state->child == (pid_t)-1) {
664 close(state->fd[0]);
665 close(state->fd[1]);
666 talloc_free(state);
667 return -1;
668 }
669
670 if (state->child == 0) {
671 char cc = 0;
672 close(state->fd[0]);
673
674 ctdb_set_process_name("ctdb_recmode");
675 debug_extra = talloc_asprintf(NULL, "set_recmode:");
676 /* Daemon should not be able to get the recover lock,
677 * as it should be held by the recovery master */
678 if (ctdb_recovery_lock(ctdb)) {
679 DEBUG(DEBUG_ERR,
680 ("ERROR: Daemon able to take recovery lock on \"%s\" during recovery\n",
681 ctdb->recovery_lock_file));
682 ctdb_recovery_unlock(ctdb);
683 cc = 1;
684 }
685
686 sys_write(state->fd[1], &cc, 1);
687 /* make sure we die when our parent dies */
688 while (ctdb_kill(ctdb, parent, 0) == 0 || errno != ESRCH) {
689 sleep(5);
690 sys_write(state->fd[1], &cc, 1);
691 }
692 _exit(0);
693 }
694 close(state->fd[1]);
695 set_close_on_exec(state->fd[0]);
696
697 state->fd[1] = -1;
698
699 talloc_set_destructor(state, set_recmode_destructor);
700
701 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
702
703 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
704 ctdb_set_recmode_timeout, state);
705
706 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
707 EVENT_FD_READ,
708 set_recmode_handler,
709 (void *)state);
710
711 if (state->fde == NULL) {
712 talloc_free(state);
713 return -1;
714 }
715 tevent_fd_set_auto_close(state->fde);
716
717 state->ctdb = ctdb;
718 state->recmode = recmode;
719 state->c = talloc_steal(state, c);
720
721 *async_reply = true;
722
723 return 0;
724 }
725
726
727 bool ctdb_recovery_have_lock(struct ctdb_context *ctdb)
728 {
729 return ctdb->recovery_lock_fd != -1;
730 }
731
732 /*
733 try and get the recovery lock in shared storage - should only work
734 on the recovery master recovery daemon. Anywhere else is a bug
735 */
736 bool ctdb_recovery_lock(struct ctdb_context *ctdb)
737 {
738 struct flock lock;
739
740 ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file,
741 O_RDWR|O_CREAT, 0600);
742 if (ctdb->recovery_lock_fd == -1) {
743 DEBUG(DEBUG_ERR,
744 ("ctdb_recovery_lock: Unable to open %s - (%s)\n",
745 ctdb->recovery_lock_file, strerror(errno)));
746 return false;
747 }
748
749 set_close_on_exec(ctdb->recovery_lock_fd);
750
751 lock.l_type = F_WRLCK;
752 lock.l_whence = SEEK_SET;
753 lock.l_start = 0;
754 lock.l_len = 1;
755 lock.l_pid = 0;
756
757 if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
758 int saved_errno = errno;
759 close(ctdb->recovery_lock_fd);
760 ctdb->recovery_lock_fd = -1;
761 /* Fail silently on these errors, since they indicate
762 * lock contention, but log an error for any other
763 * failure. */
764 if (saved_errno != EACCES &&
765 saved_errno != EAGAIN) {
766 DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Failed to get "
767 "recovery lock on '%s' - (%s)\n",
768 ctdb->recovery_lock_file,
769 strerror(saved_errno)));
770 }
771 return false;
772 }
773
774 return true;
775 }
776
777 void ctdb_recovery_unlock(struct ctdb_context *ctdb)
778 {
779 if (ctdb->recovery_lock_fd != -1) {
780 DEBUG(DEBUG_NOTICE, ("Releasing recovery lock\n"));
781 close(ctdb->recovery_lock_fd);
782 ctdb->recovery_lock_fd = -1;
783 }
784 }
785
786 /*
787 delete a record as part of the vacuum process
788 only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
789 use non-blocking locks
790
791 return 0 if the record was successfully deleted (i.e. it does not exist
792 when the function returns)
793 or !0 is the record still exists in the tdb after returning.
794 */
795 static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data *rec)
796 {
797 TDB_DATA key, data, data2;
798 struct ctdb_ltdb_header *hdr, *hdr2;
799
800 /* these are really internal tdb functions - but we need them here for
801 non-blocking lock of the freelist */
802 int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
803 int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
804
805
806 key.dsize = rec->keylen;
807 key.dptr = &rec->data[0];
808 data.dsize = rec->datalen;
809 data.dptr = &rec->data[rec->keylen];
810
811 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
812 DEBUG(DEBUG_INFO,(__location__ " Called delete on record where we are lmaster\n"));
813 return -1;
814 }
815
816 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
817 DEBUG(DEBUG_ERR,(__location__ " Bad record size\n"));
818 return -1;
819 }
820
821 hdr = (struct ctdb_ltdb_header *)data.dptr;
822
823 /* use a non-blocking lock */
824 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
825 return -1;
826 }
827
828 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
829 if (data2.dptr == NULL) {
830 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
831 return 0;
832 }
833
834 if (data2.dsize < sizeof(struct ctdb_ltdb_header)) {
835 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
836 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
837 DEBUG(DEBUG_CRIT,(__location__ " Failed to delete corrupt record\n"));
838 }
839 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
840 DEBUG(DEBUG_CRIT,(__location__ " Deleted corrupt record\n"));
841 }
842 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
843 free(data2.dptr);
844 return 0;
845 }
846
847 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
848
849 if (hdr2->rsn > hdr->rsn) {
850 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
851 DEBUG(DEBUG_INFO,(__location__ " Skipping record with rsn=%llu - called with rsn=%llu\n",
852 (unsigned long long)hdr2->rsn, (unsigned long long)hdr->rsn));
853 free(data2.dptr);
854 return -1;
855 }
856
857 /* do not allow deleting record that have readonly flags set. */
858 if (hdr->flags & CTDB_REC_RO_FLAGS) {
859 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
860 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
861 free(data2.dptr);
862 return -1;
863 }
864 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
865 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
866 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
867 free(data2.dptr);
868 return -1;
869 }
870
871 if (hdr2->dmaster == ctdb->pnn) {
872 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
873 DEBUG(DEBUG_INFO,(__location__ " Attempted delete record where we are the dmaster\n"));
874 free(data2.dptr);
875 return -1;
876 }
877
878 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
879 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
880 free(data2.dptr);
881 return -1;
882 }
883
884 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
885 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
886 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
887 DEBUG(DEBUG_INFO,(__location__ " Failed to delete record\n"));
888 free(data2.dptr);
889 return -1;
890 }
891
892 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
893 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
894 free(data2.dptr);
895 return 0;
896 }
897
898
899
900 struct recovery_callback_state {
901 struct ctdb_req_control *c;
902 };
903
904
905 /*
906 called when the 'recovered' event script has finished
907 */
908 static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
909 {
910 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
911
912 ctdb_enable_monitoring(ctdb);
913 CTDB_INCREMENT_STAT(ctdb, num_recoveries);
914
915 if (status != 0) {
916 DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
917 if (status == -ETIME) {
918 ctdb_ban_self(ctdb);
919 }
920 }
921
922 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
923 talloc_free(state);
924
925 gettimeofday(&ctdb->last_recovery_finished, NULL);
926
927 if (ctdb->runstate == CTDB_RUNSTATE_FIRST_RECOVERY) {
928 ctdb_set_runstate(ctdb, CTDB_RUNSTATE_STARTUP);
929 }
930 }
931
932 /*
933 recovery has finished
934 */
935 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
936 struct ctdb_req_control *c,
937 bool *async_reply)
938 {
939 int ret;
940 struct recovery_callback_state *state;
941
942 DEBUG(DEBUG_NOTICE,("Recovery has finished\n"));
943
944 ctdb_persistent_finish_trans3_commits(ctdb);
945
946 state = talloc(ctdb, struct recovery_callback_state);
947 CTDB_NO_MEMORY(ctdb, state);
948
949 state->c = c;
950
951 ctdb_disable_monitoring(ctdb);
952
953 ret = ctdb_event_script_callback(ctdb, state,
954 ctdb_end_recovery_callback,
955 state,
956 CTDB_EVENT_RECOVERED, "%s", "");
957
958 if (ret != 0) {
959 ctdb_enable_monitoring(ctdb);
960
961 DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
962 talloc_free(state);
963 return -1;
964 }
965
966 /* tell the control that we will be reply asynchronously */
967 state->c = talloc_steal(state, c);
968 *async_reply = true;
969 return 0;
970 }
971
972 /*
973 called when the 'startrecovery' event script has finished
974 */
975 static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
976 {
977 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
978
979 if (status != 0) {
980 DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
981 }
982
983 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
984 talloc_free(state);
985 }
986
987 /*
988 run the startrecovery eventscript
989 */
990 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
991 struct ctdb_req_control *c,
992 bool *async_reply)
993 {
994 int ret;
995 struct recovery_callback_state *state;
996
997 DEBUG(DEBUG_NOTICE,(__location__ " startrecovery eventscript has been invoked\n"));
998 gettimeofday(&ctdb->last_recovery_started, NULL);
999
1000 state = talloc(ctdb, struct recovery_callback_state);
1001 CTDB_NO_MEMORY(ctdb, state);
1002
1003 state->c = talloc_steal(state, c);
1004
1005 ctdb_disable_monitoring(ctdb);
1006
1007 ret = ctdb_event_script_callback(ctdb, state,
1008 ctdb_start_recovery_callback,
1009 state,
1010 CTDB_EVENT_START_RECOVERY,
1011 "%s", "");
1012
1013 if (ret != 0) {
1014 DEBUG(DEBUG_ERR,(__location__ " Failed to start recovery\n"));
1015 talloc_free(state);
1016 return -1;
1017 }
1018
1019 /* tell the control that we will be reply asynchronously */
1020 *async_reply = true;
1021 return 0;
1022 }
1023
1024 /*
1025 try to delete all these records as part of the vacuuming process
1026 and return the records we failed to delete
1027 */
1028 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1029 {
1030 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1031 struct ctdb_db_context *ctdb_db;
1032 int i;
1033 struct ctdb_rec_data *rec;
1034 struct ctdb_marshall_buffer *records;
1035
1036 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1037 DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
1038 return -1;
1039 }
1040
1041 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1042 if (!ctdb_db) {
1043 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
1044 return -1;
1045 }
1046
1047
1048 DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
1049 reply->count, reply->db_id));
1050
1051
1052 /* create a blob to send back the records we couldnt delete */
1053 records = (struct ctdb_marshall_buffer *)
1054 talloc_zero_size(outdata,
1055 offsetof(struct ctdb_marshall_buffer, data));
1056 if (records == NULL) {
1057 DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
1058 return -1;
1059 }
1060 records->db_id = ctdb_db->db_id;
1061
1062
1063 rec = (struct ctdb_rec_data *)&reply->data[0];
1064 for (i=0;i<reply->count;i++) {
1065 TDB_DATA key, data;
1066
1067 key.dptr = &rec->data[0];
1068 key.dsize = rec->keylen;
1069 data.dptr = &rec->data[key.dsize];
1070 data.dsize = rec->datalen;
1071
1072 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1073 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
1074 return -1;
1075 }
1076
1077 /* If we cant delete the record we must add it to the reply
1078 so the lmaster knows it may not purge this record
1079 */
1080 if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
1081 size_t old_size;
1082 struct ctdb_ltdb_header *hdr;
1083
1084 hdr = (struct ctdb_ltdb_header *)data.dptr;
1085 data.dptr += sizeof(*hdr);
1086 data.dsize -= sizeof(*hdr);
1087
1088 DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
1089
1090 old_size = talloc_get_size(records);
1091 records = talloc_realloc_size(outdata, records, old_size + rec->length);
1092 if (records == NULL) {
1093 DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
1094 return -1;
1095 }
1096 records->count++;
1097 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1098 }
1099
1100 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1101 }
1102
1103
1104 *outdata = ctdb_marshall_finish(records);
1105
1106 return 0;
1107 }
1108
1109 /**
1110 * Store a record as part of the vacuum process:
1111 * This is called from the RECEIVE_RECORD control which
1112 * the lmaster uses to send the current empty copy
1113 * to all nodes for storing, before it lets the other
1114 * nodes delete the records in the second phase with
1115 * the TRY_DELETE_RECORDS control.
1116 *
1117 * Only store if we are not lmaster or dmaster, and our
1118 * rsn is <= the provided rsn. Use non-blocking locks.
1119 *
1120 * return 0 if the record was successfully stored.
1121 * return !0 if the record still exists in the tdb after returning.
1122 */
1123 static int store_tdb_record(struct ctdb_context *ctdb,
1124 struct ctdb_db_context *ctdb_db,
1125 struct ctdb_rec_data *rec)
1126 {
1127 TDB_DATA key, data, data2;
1128 struct ctdb_ltdb_header *hdr, *hdr2;
1129 int ret;
1130
1131 key.dsize = rec->keylen;
1132 key.dptr = &rec->data[0];
1133 data.dsize = rec->datalen;
1134 data.dptr = &rec->data[rec->keylen];
1135
1136 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
1137 DEBUG(DEBUG_INFO, (__location__ " Called store_tdb_record "
1138 "where we are lmaster\n"));
1139 return -1;
1140 }
1141
1142 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
1143 DEBUG(DEBUG_ERR, (__location__ " Bad record size\n"));
1144 return -1;
1145 }
1146
1147 hdr = (struct ctdb_ltdb_header *)data.dptr;
1148
1149 /* use a non-blocking lock */
1150 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
1151 DEBUG(DEBUG_INFO, (__location__ " Failed to lock chain in non-blocking mode\n"));
1152 return -1;
1153 }
1154
1155 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
1156 if (data2.dptr == NULL || data2.dsize < sizeof(struct ctdb_ltdb_header)) {
1157 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) == -1) {
1158 DEBUG(DEBUG_ERR, (__location__ "Failed to store record\n"));
1159 ret = -1;
1160 goto done;
1161 }
1162 DEBUG(DEBUG_INFO, (__location__ " Stored record\n"));
1163 ret = 0;
1164 goto done;
1165 }
1166
1167 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
1168
1169 if (hdr2->rsn > hdr->rsn) {
1170 DEBUG(DEBUG_INFO, (__location__ " Skipping record with "
1171 "rsn=%llu - called with rsn=%llu\n",
1172 (unsigned long long)hdr2->rsn,
1173 (unsigned long long)hdr->rsn));
1174 ret = -1;
1175 goto done;
1176 }
1177
1178 /* do not allow vacuuming of records that have readonly flags set. */
1179 if (hdr->flags & CTDB_REC_RO_FLAGS) {
1180 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1181 "flags set\n"));
1182 ret = -1;
1183 goto done;
1184 }
1185 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
1186 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1187 "flags set\n"));
1188 ret = -1;
1189 goto done;
1190 }
1191
1192 if (hdr2->dmaster == ctdb->pnn) {
1193 DEBUG(DEBUG_INFO, (__location__ " Attempted to store record "
1194 "where we are the dmaster\n"));
1195 ret = -1;
1196 goto done;
1197 }
1198
1199 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) != 0) {
1200 DEBUG(DEBUG_INFO,(__location__ " Failed to store record\n"));
1201 ret = -1;
1202 goto done;
1203 }
1204
1205 ret = 0;
1206
1207 done:
1208 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1209 free(data2.dptr);
1210 return ret;
1211 }
1212
1213
1214
1215 /**
1216 * Try to store all these records as part of the vacuuming process
1217 * and return the records we failed to store.
1218 */
1219 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
1220 TDB_DATA indata, TDB_DATA *outdata)
1221 {
1222 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1223 struct ctdb_db_context *ctdb_db;
1224 int i;
1225 struct ctdb_rec_data *rec;
1226 struct ctdb_marshall_buffer *records;
1227
1228 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1229 DEBUG(DEBUG_ERR,
1230 (__location__ " invalid data in receive_records\n"));
1231 return -1;
1232 }
1233
1234 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1235 if (!ctdb_db) {
1236 DEBUG(DEBUG_ERR, (__location__ " Unknown db 0x%08x\n",
1237 reply->db_id));
1238 return -1;
1239 }
1240
1241 DEBUG(DEBUG_DEBUG, ("starting receive_records of %u records for "
1242 "dbid 0x%x\n", reply->count, reply->db_id));
1243
1244 /* create a blob to send back the records we could not store */
1245 records = (struct ctdb_marshall_buffer *)
1246 talloc_zero_size(outdata,
1247 offsetof(struct ctdb_marshall_buffer, data));
1248 if (records == NULL) {
1249 DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
1250 return -1;
1251 }
1252 records->db_id = ctdb_db->db_id;
1253
1254 rec = (struct ctdb_rec_data *)&reply->data[0];
1255 for (i=0; i<reply->count; i++) {
1256 TDB_DATA key, data;
1257
1258 key.dptr = &rec->data[0];
1259 key.dsize = rec->keylen;
1260 data.dptr = &rec->data[key.dsize];
1261 data.dsize = rec->datalen;
1262
1263 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1264 DEBUG(DEBUG_CRIT, (__location__ " bad ltdb record "
1265 "in indata\n"));
1266 return -1;
1267 }
1268
1269 /*
1270 * If we can not store the record we must add it to the reply
1271 * so the lmaster knows it may not purge this record.
1272 */
1273 if (store_tdb_record(ctdb, ctdb_db, rec) != 0) {
1274 size_t old_size;
1275 struct ctdb_ltdb_header *hdr;
1276
1277 hdr = (struct ctdb_ltdb_header *)data.dptr;
1278 data.dptr += sizeof(*hdr);
1279 data.dsize -= sizeof(*hdr);
1280
1281 DEBUG(DEBUG_INFO, (__location__ " Failed to store "
1282 "record with hash 0x%08x in vacuum "
1283 "via RECEIVE_RECORDS\n",
1284 ctdb_hash(&key)));
1285
1286 old_size = talloc_get_size(records);
1287 records = talloc_realloc_size(outdata, records,
1288 old_size + rec->length);
1289 if (records == NULL) {
1290 DEBUG(DEBUG_ERR, (__location__ " Failed to "
1291 "expand\n"));
1292 return -1;
1293 }
1294 records->count++;
1295 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1296 }
1297
1298 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1299 }
1300
1301 *outdata = ctdb_marshall_finish(records);
1302
1303 return 0;
1304 }
1305
1306
1307 /*
1308 report capabilities
1309 */
1310 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1311 {
1312 uint32_t *capabilities = NULL;
1313
1314 capabilities = talloc(outdata, uint32_t);
1315 CTDB_NO_MEMORY(ctdb, capabilities);
1316 *capabilities = ctdb->capabilities;
1317
1318 outdata->dsize = sizeof(uint32_t);
1319 outdata->dptr = (uint8_t *)capabilities;
1320
1321 return 0;
1322 }
1323
1324 /* The recovery daemon will ping us at regular intervals.
1325 If we havent been pinged for a while we assume the recovery
1326 daemon is inoperable and we restart.
1327 */
1328 static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1329 {
1330 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1331 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1332
1333 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1334
1335 if (*count < ctdb->tunable.recd_ping_failcount) {
1336 (*count)++;
1337 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1338 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1339 ctdb_recd_ping_timeout, ctdb);
1340 return;
1341 }
1342
1343 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
1344
1345 ctdb_stop_recoverd(ctdb);
1346 ctdb_start_recoverd(ctdb);
1347 }
1348
1349 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1350 {
1351 talloc_free(ctdb->recd_ping_count);
1352
1353 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1354 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1355
1356 if (ctdb->tunable.recd_ping_timeout != 0) {
1357 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1358 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1359 ctdb_recd_ping_timeout, ctdb);
1360 }
1361
1362 return 0;
1363 }
1364
1365
1366
1367 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1368 {
1369 uint32_t new_recmaster;
1370
1371 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1372 new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
1373
1374 if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
1375 DEBUG(DEBUG_NOTICE,
1376 ("This node (%u) is no longer the recovery master\n", ctdb->pnn));
1377 }
1378
1379 if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
1380 DEBUG(DEBUG_NOTICE,
1381 ("This node (%u) is now the recovery master\n", ctdb->pnn));
1382 }
1383
1384 ctdb->recovery_master = new_recmaster;
1385 return 0;
1386 }
1387
1388
1389 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
1390 {
1391 DEBUG(DEBUG_NOTICE, ("Stopping node\n"));
1392 ctdb_disable_monitoring(ctdb);
1393 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1394
1395 return 0;
1396 }
1397
1398 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1399 {
1400 DEBUG(DEBUG_NOTICE, ("Continue node\n"));
1401 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1402
1403 return 0;
1404 }
1405
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