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s4:torture:raw:notify: treat torture_open_connection calls with torture_assert
[Samba.git] / ctdb / server / ctdb_recover.c
blobeb3f46da52ce2658b4c637838efa16da84d15352
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 node_map->nodes[i].addr = ctdb->nodes[i]->address;
142 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
143 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
144 }
145
146 return 0;
147 }
148
149 /*
150 get an old style ipv4-only nodemap
151 */
152 int
153 ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
154 {
155 uint32_t i, num_nodes;
156 struct ctdb_node_mapv4 *node_map;
157
158 CHECK_CONTROL_DATA_SIZE(0);
159
160 num_nodes = ctdb->num_nodes;
161
162 outdata->dsize = offsetof(struct ctdb_node_mapv4, nodes) + num_nodes*sizeof(struct ctdb_node_and_flagsv4);
163 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
164 if (!outdata->dptr) {
165 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
166 exit(1);
167 }
168
169 node_map = (struct ctdb_node_mapv4 *)outdata->dptr;
170 node_map->num = num_nodes;
171 for (i=0; i<num_nodes; i++) {
172 node_map->nodes[i].sin = ctdb->nodes[i]->address.ip;
173 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
174 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
175 }
176
177 return 0;
178 }
179
180 static void
181 ctdb_reload_nodes_event(struct event_context *ev, struct timed_event *te,
182 struct timeval t, void *private_data)
183 {
184 int i, num_nodes;
185 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
186 TALLOC_CTX *tmp_ctx;
187 struct ctdb_node **nodes;
188
189 tmp_ctx = talloc_new(ctdb);
190
191 /* steal the old nodes file for a while */
192 talloc_steal(tmp_ctx, ctdb->nodes);
193 nodes = ctdb->nodes;
194 ctdb->nodes = NULL;
195 num_nodes = ctdb->num_nodes;
196 ctdb->num_nodes = 0;
197
198 /* load the new nodes file */
199 ctdb_load_nodes_file(ctdb);
200
201 for (i=0; i<ctdb->num_nodes; i++) {
202 /* keep any identical pre-existing nodes and connections */
203 if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
204 talloc_free(ctdb->nodes[i]);
205 ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
206 continue;
207 }
208
209 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
210 continue;
211 }
212
213 /* any new or different nodes must be added */
214 if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
215 DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
216 ctdb_fatal(ctdb, "failed to add node. shutting down\n");
217 }
218 if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
219 DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
220 ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
221 }
222 }
223
224 /* tell the recovery daemon to reaload the nodes file too */
225 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
226
227 talloc_free(tmp_ctx);
228 return;
229 }
230
231 /*
232 reload the nodes file after a short delay (so that we can send the response
233 back first
234 */
235 int
236 ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
237 {
238 event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(1,0), ctdb_reload_nodes_event, ctdb);
239
240 return 0;
241 }
242
243 /*
244 a traverse function for pulling all relevent records from pulldb
245 */
246 struct pulldb_data {
247 struct ctdb_context *ctdb;
248 struct ctdb_db_context *ctdb_db;
249 struct ctdb_marshall_buffer *pulldata;
250 uint32_t len;
251 uint32_t allocated_len;
252 bool failed;
253 };
254
255 static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
256 {
257 struct pulldb_data *params = (struct pulldb_data *)p;
258 struct ctdb_rec_data *rec;
259 struct ctdb_context *ctdb = params->ctdb;
260 struct ctdb_db_context *ctdb_db = params->ctdb_db;
261
262 /* add the record to the blob */
263 rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
264 if (rec == NULL) {
265 params->failed = true;
266 return -1;
267 }
268 if (params->len + rec->length >= params->allocated_len) {
269 params->allocated_len = rec->length + params->len + ctdb->tunable.pulldb_preallocation_size;
270 params->pulldata = talloc_realloc_size(NULL, params->pulldata, params->allocated_len);
271 }
272 if (params->pulldata == NULL) {
273 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
274 ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
275 }
276 params->pulldata->count++;
277 memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
278 params->len += rec->length;
279
280 if (ctdb->tunable.db_record_size_warn != 0 && rec->length > ctdb->tunable.db_record_size_warn) {
281 DEBUG(DEBUG_ERR,("Data record in %s is big. Record size is %d bytes\n", ctdb_db->db_name, (int)rec->length));
282 }
283
284 talloc_free(rec);
285
286 return 0;
287 }
288
289 /*
290 pull a bunch of records from a ltdb, filtering by lmaster
291 */
292 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
293 {
294 struct ctdb_control_pulldb *pull;
295 struct ctdb_db_context *ctdb_db;
296 struct pulldb_data params;
297 struct ctdb_marshall_buffer *reply;
298
299 pull = (struct ctdb_control_pulldb *)indata.dptr;
300
301 ctdb_db = find_ctdb_db(ctdb, pull->db_id);
302 if (!ctdb_db) {
303 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
304 return -1;
305 }
306
307 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
308 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_pull_db when not frozen\n"));
309 return -1;
310 }
311
312 reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
313 CTDB_NO_MEMORY(ctdb, reply);
314
315 reply->db_id = pull->db_id;
316
317 params.ctdb = ctdb;
318 params.ctdb_db = ctdb_db;
319 params.pulldata = reply;
320 params.len = offsetof(struct ctdb_marshall_buffer, data);
321 params.allocated_len = params.len;
322 params.failed = false;
323
324 if (ctdb_db->unhealthy_reason) {
325 /* this is just a warning, as the tdb should be empty anyway */
326 DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
327 ctdb_db->db_name, ctdb_db->unhealthy_reason));
328 }
329
330 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
331 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
332 return -1;
333 }
334
335 if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, &params) == -1) {
336 DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
337 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
338 talloc_free(params.pulldata);
339 return -1;
340 }
341
342 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
343
344 outdata->dptr = (uint8_t *)params.pulldata;
345 outdata->dsize = params.len;
346
347 if (ctdb->tunable.db_record_count_warn != 0 && params.pulldata->count > ctdb->tunable.db_record_count_warn) {
348 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d records\n", ctdb_db->db_name, params.pulldata->count));
349 }
350 if (ctdb->tunable.db_size_warn != 0 && outdata->dsize > ctdb->tunable.db_size_warn) {
351 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d bytes\n", ctdb_db->db_name, (int)outdata->dsize));
352 }
353
354
355 return 0;
356 }
357
358 /*
359 push a bunch of records into a ltdb, filtering by rsn
360 */
361 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
362 {
363 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
364 struct ctdb_db_context *ctdb_db;
365 int i, ret;
366 struct ctdb_rec_data *rec;
367
368 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
369 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
370 return -1;
371 }
372
373 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
374 if (!ctdb_db) {
375 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
376 return -1;
377 }
378
379 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
380 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_push_db when not frozen\n"));
381 return -1;
382 }
383
384 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
385 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
386 return -1;
387 }
388
389 rec = (struct ctdb_rec_data *)&reply->data[0];
390
391 DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
392 reply->count, reply->db_id));
393
394 for (i=0;i<reply->count;i++) {
395 TDB_DATA key, data;
396 struct ctdb_ltdb_header *hdr;
397
398 key.dptr = &rec->data[0];
399 key.dsize = rec->keylen;
400 data.dptr = &rec->data[key.dsize];
401 data.dsize = rec->datalen;
402
403 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
404 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
405 goto failed;
406 }
407 hdr = (struct ctdb_ltdb_header *)data.dptr;
408 /* strip off any read only record flags. All readonly records
409 are revoked implicitely by a recovery
410 */
411 hdr->flags &= ~CTDB_REC_RO_FLAGS;
412
413 data.dptr += sizeof(*hdr);
414 data.dsize -= sizeof(*hdr);
415
416 ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
417 if (ret != 0) {
418 DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
419 goto failed;
420 }
421
422 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
423 }
424
425 DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
426 reply->count, reply->db_id));
427
428 if (ctdb_db->readonly) {
429 DEBUG(DEBUG_CRIT,("Clearing the tracking database for dbid 0x%x\n",
430 ctdb_db->db_id));
431 if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
432 DEBUG(DEBUG_ERR,("Failed to wipe tracking database for 0x%x. Dropping read-only delegation support\n", ctdb_db->db_id));
433 ctdb_db->readonly = false;
434 tdb_close(ctdb_db->rottdb);
435 ctdb_db->rottdb = NULL;
436 ctdb_db->readonly = false;
437 }
438 while (ctdb_db->revokechild_active != NULL) {
439 talloc_free(ctdb_db->revokechild_active);
440 }
441 }
442
443 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
444 return 0;
445
446 failed:
447 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
448 return -1;
449 }
450
451 struct ctdb_set_recmode_state {
452 struct ctdb_context *ctdb;
453 struct ctdb_req_control *c;
454 uint32_t recmode;
455 int fd[2];
456 struct timed_event *te;
457 struct fd_event *fde;
458 pid_t child;
459 struct timeval start_time;
460 };
461
462 /*
463 called if our set_recmode child times out. this would happen if
464 ctdb_recovery_lock() would block.
465 */
466 static void ctdb_set_recmode_timeout(struct event_context *ev, struct timed_event *te,
467 struct timeval t, void *private_data)
468 {
469 struct ctdb_set_recmode_state *state = talloc_get_type(private_data,
470 struct ctdb_set_recmode_state);
471
472 /* we consider this a success, not a failure, as we failed to
473 set the recovery lock which is what we wanted. This can be
474 caused by the cluster filesystem being very slow to
475 arbitrate locks immediately after a node failure.
476 */
477 DEBUG(DEBUG_ERR,(__location__ " set_recmode child process hung/timedout CFS slow to grant locks? (allowing recmode set anyway)\n"));
478 state->ctdb->recovery_mode = state->recmode;
479 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
480 talloc_free(state);
481 }
482
483
484 /* when we free the recmode state we must kill any child process.
485 */
486 static int set_recmode_destructor(struct ctdb_set_recmode_state *state)
487 {
488 double l = timeval_elapsed(&state->start_time);
489
490 CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock", reclock.ctdbd, l);
491
492 if (state->fd[0] != -1) {
493 state->fd[0] = -1;
494 }
495 if (state->fd[1] != -1) {
496 state->fd[1] = -1;
497 }
498 ctdb_kill(state->ctdb, state->child, SIGKILL);
499 return 0;
500 }
501
502 /* this is called when the client process has completed ctdb_recovery_lock()
503 and has written data back to us through the pipe.
504 */
505 static void set_recmode_handler(struct event_context *ev, struct fd_event *fde,
506 uint16_t flags, void *private_data)
507 {
508 struct ctdb_set_recmode_state *state= talloc_get_type(private_data,
509 struct ctdb_set_recmode_state);
510 char c = 0;
511 int ret;
512
513 /* we got a response from our child process so we can abort the
514 timeout.
515 */
516 talloc_free(state->te);
517 state->te = NULL;
518
519
520 /* If, as expected, the child was unable to take the recovery
521 * lock then it will have written 0 into the pipe, so
522 * continue. However, any other value (e.g. 1) indicates that
523 * it was able to take the recovery lock when it should have
524 * been held by the recovery daemon on the recovery master.
525 */
526 ret = sys_read(state->fd[0], &c, 1);
527 if (ret != 1 || c != 0) {
528 const char *msg = \
529 "Took recovery lock from daemon - probably a cluster filesystem lock coherence problem";
530 ctdb_request_control_reply(
531 state->ctdb, state->c, NULL, -1,
532 msg);
533 talloc_free(state);
534 ctdb_die(state->ctdb, msg);
535 }
536
537 state->ctdb->recovery_mode = state->recmode;
538
539 /* release any deferred attach calls from clients */
540 if (state->recmode == CTDB_RECOVERY_NORMAL) {
541 ctdb_process_deferred_attach(state->ctdb);
542 }
543
544 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
545 talloc_free(state);
546 return;
547 }
548
549 static void
550 ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te,
551 struct timeval t, void *private_data)
552 {
553 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
554
555 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
556 talloc_free(ctdb->release_ips_ctx);
557 ctdb->release_ips_ctx = NULL;
558
559 ctdb_release_all_ips(ctdb);
560 }
561
562 /*
563 * Set up an event to drop all public ips if we remain in recovery for too
564 * long
565 */
566 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
567 {
568 if (ctdb->release_ips_ctx != NULL) {
569 talloc_free(ctdb->release_ips_ctx);
570 }
571 ctdb->release_ips_ctx = talloc_new(ctdb);
572 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
573
574 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);
575 return 0;
576 }
577
578 /*
579 set the recovery mode
580 */
581 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
582 struct ctdb_req_control *c,
583 TDB_DATA indata, bool *async_reply,
584 const char **errormsg)
585 {
586 uint32_t recmode = *(uint32_t *)indata.dptr;
587 int i, ret;
588 struct ctdb_set_recmode_state *state;
589 pid_t parent = getpid();
590
591 /* if we enter recovery but stay in recovery for too long
592 we will eventually drop all our ip addresses
593 */
594 if (recmode == CTDB_RECOVERY_NORMAL) {
595 talloc_free(ctdb->release_ips_ctx);
596 ctdb->release_ips_ctx = NULL;
597 } else {
598 if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
599 DEBUG(DEBUG_ERR,("Failed to set up deferred drop all ips\n"));
600 }
601 }
602
603 if (recmode != ctdb->recovery_mode) {
604 DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n",
605 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
606 }
607
608 if (recmode != CTDB_RECOVERY_NORMAL ||
609 ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
610 ctdb->recovery_mode = recmode;
611 return 0;
612 }
613
614 /* some special handling when ending recovery mode */
615
616 /* force the databases to thaw */
617 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
618 if (ctdb->freeze_handles[i] != NULL) {
619 ctdb_control_thaw(ctdb, i, false);
620 }
621 }
622
623 state = talloc(ctdb, struct ctdb_set_recmode_state);
624 CTDB_NO_MEMORY(ctdb, state);
625
626 state->start_time = timeval_current();
627 state->fd[0] = -1;
628 state->fd[1] = -1;
629
630 /* release any deferred attach calls from clients */
631 if (recmode == CTDB_RECOVERY_NORMAL) {
632 ctdb_process_deferred_attach(ctdb);
633 }
634
635 if (ctdb->recovery_lock_file == NULL) {
636 /* Not using recovery lock file */
637 ctdb->recovery_mode = recmode;
638 return 0;
639 }
640
641 /* For the rest of what needs to be done, we need to do this in
642 a child process since
643 1, the call to ctdb_recovery_lock() can block if the cluster
644 filesystem is in the process of recovery.
645 */
646 ret = pipe(state->fd);
647 if (ret != 0) {
648 talloc_free(state);
649 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
650 return -1;
651 }
652
653 state->child = ctdb_fork(ctdb);
654 if (state->child == (pid_t)-1) {
655 close(state->fd[0]);
656 close(state->fd[1]);
657 talloc_free(state);
658 return -1;
659 }
660
661 if (state->child == 0) {
662 char cc = 0;
663 close(state->fd[0]);
664
665 ctdb_set_process_name("ctdb_recmode");
666 debug_extra = talloc_asprintf(NULL, "set_recmode:");
667 /* Daemon should not be able to get the recover lock,
668 * as it should be held by the recovery master */
669 if (ctdb_recovery_lock(ctdb)) {
670 DEBUG(DEBUG_ERR,
671 ("ERROR: Daemon able to take recovery lock on \"%s\" during recovery\n",
672 ctdb->recovery_lock_file));
673 ctdb_recovery_unlock(ctdb);
674 cc = 1;
675 }
676
677 sys_write(state->fd[1], &cc, 1);
678 /* make sure we die when our parent dies */
679 while (ctdb_kill(ctdb, parent, 0) == 0 || errno != ESRCH) {
680 sleep(5);
681 sys_write(state->fd[1], &cc, 1);
682 }
683 _exit(0);
684 }
685 close(state->fd[1]);
686 set_close_on_exec(state->fd[0]);
687
688 state->fd[1] = -1;
689
690 talloc_set_destructor(state, set_recmode_destructor);
691
692 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
693
694 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
695 ctdb_set_recmode_timeout, state);
696
697 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
698 EVENT_FD_READ,
699 set_recmode_handler,
700 (void *)state);
701
702 if (state->fde == NULL) {
703 talloc_free(state);
704 return -1;
705 }
706 tevent_fd_set_auto_close(state->fde);
707
708 state->ctdb = ctdb;
709 state->recmode = recmode;
710 state->c = talloc_steal(state, c);
711
712 *async_reply = true;
713
714 return 0;
715 }
716
717
718 bool ctdb_recovery_have_lock(struct ctdb_context *ctdb)
719 {
720 return ctdb->recovery_lock_fd != -1;
721 }
722
723 /*
724 try and get the recovery lock in shared storage - should only work
725 on the recovery master recovery daemon. Anywhere else is a bug
726 */
727 bool ctdb_recovery_lock(struct ctdb_context *ctdb)
728 {
729 struct flock lock;
730
731 ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file,
732 O_RDWR|O_CREAT, 0600);
733 if (ctdb->recovery_lock_fd == -1) {
734 DEBUG(DEBUG_ERR,
735 ("ctdb_recovery_lock: Unable to open %s - (%s)\n",
736 ctdb->recovery_lock_file, strerror(errno)));
737 return false;
738 }
739
740 set_close_on_exec(ctdb->recovery_lock_fd);
741
742 lock.l_type = F_WRLCK;
743 lock.l_whence = SEEK_SET;
744 lock.l_start = 0;
745 lock.l_len = 1;
746 lock.l_pid = 0;
747
748 if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
749 int saved_errno = errno;
750 close(ctdb->recovery_lock_fd);
751 ctdb->recovery_lock_fd = -1;
752 /* Fail silently on these errors, since they indicate
753 * lock contention, but log an error for any other
754 * failure. */
755 if (saved_errno != EACCES &&
756 saved_errno != EAGAIN) {
757 DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Failed to get "
758 "recovery lock on '%s' - (%s)\n",
759 ctdb->recovery_lock_file,
760 strerror(saved_errno)));
761 }
762 return false;
763 }
764
765 return true;
766 }
767
768 void ctdb_recovery_unlock(struct ctdb_context *ctdb)
769 {
770 if (ctdb->recovery_lock_fd != -1) {
771 DEBUG(DEBUG_NOTICE, ("Releasing recovery lock\n"));
772 close(ctdb->recovery_lock_fd);
773 ctdb->recovery_lock_fd = -1;
774 }
775 }
776
777 /*
778 delete a record as part of the vacuum process
779 only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
780 use non-blocking locks
781
782 return 0 if the record was successfully deleted (i.e. it does not exist
783 when the function returns)
784 or !0 is the record still exists in the tdb after returning.
785 */
786 static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data *rec)
787 {
788 TDB_DATA key, data, data2;
789 struct ctdb_ltdb_header *hdr, *hdr2;
790
791 /* these are really internal tdb functions - but we need them here for
792 non-blocking lock of the freelist */
793 int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
794 int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
795
796
797 key.dsize = rec->keylen;
798 key.dptr = &rec->data[0];
799 data.dsize = rec->datalen;
800 data.dptr = &rec->data[rec->keylen];
801
802 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
803 DEBUG(DEBUG_INFO,(__location__ " Called delete on record where we are lmaster\n"));
804 return -1;
805 }
806
807 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
808 DEBUG(DEBUG_ERR,(__location__ " Bad record size\n"));
809 return -1;
810 }
811
812 hdr = (struct ctdb_ltdb_header *)data.dptr;
813
814 /* use a non-blocking lock */
815 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
816 return -1;
817 }
818
819 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
820 if (data2.dptr == NULL) {
821 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
822 return 0;
823 }
824
825 if (data2.dsize < sizeof(struct ctdb_ltdb_header)) {
826 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
827 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
828 DEBUG(DEBUG_CRIT,(__location__ " Failed to delete corrupt record\n"));
829 }
830 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
831 DEBUG(DEBUG_CRIT,(__location__ " Deleted corrupt record\n"));
832 }
833 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
834 free(data2.dptr);
835 return 0;
836 }
837
838 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
839
840 if (hdr2->rsn > hdr->rsn) {
841 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
842 DEBUG(DEBUG_INFO,(__location__ " Skipping record with rsn=%llu - called with rsn=%llu\n",
843 (unsigned long long)hdr2->rsn, (unsigned long long)hdr->rsn));
844 free(data2.dptr);
845 return -1;
846 }
847
848 /* do not allow deleting record that have readonly flags set. */
849 if (hdr->flags & CTDB_REC_RO_FLAGS) {
850 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
851 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
852 free(data2.dptr);
853 return -1;
854 }
855 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
856 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
857 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
858 free(data2.dptr);
859 return -1;
860 }
861
862 if (hdr2->dmaster == ctdb->pnn) {
863 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
864 DEBUG(DEBUG_INFO,(__location__ " Attempted delete record where we are the dmaster\n"));
865 free(data2.dptr);
866 return -1;
867 }
868
869 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
870 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
871 free(data2.dptr);
872 return -1;
873 }
874
875 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
876 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
877 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
878 DEBUG(DEBUG_INFO,(__location__ " Failed to delete record\n"));
879 free(data2.dptr);
880 return -1;
881 }
882
883 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
884 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
885 free(data2.dptr);
886 return 0;
887 }
888
889
890
891 struct recovery_callback_state {
892 struct ctdb_req_control *c;
893 };
894
895
896 /*
897 called when the 'recovered' event script has finished
898 */
899 static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
900 {
901 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
902
903 ctdb_enable_monitoring(ctdb);
904 CTDB_INCREMENT_STAT(ctdb, num_recoveries);
905
906 if (status != 0) {
907 DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
908 if (status == -ETIME) {
909 ctdb_ban_self(ctdb);
910 }
911 }
912
913 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
914 talloc_free(state);
915
916 gettimeofday(&ctdb->last_recovery_finished, NULL);
917
918 if (ctdb->runstate == CTDB_RUNSTATE_FIRST_RECOVERY) {
919 ctdb_set_runstate(ctdb, CTDB_RUNSTATE_STARTUP);
920 }
921 }
922
923 /*
924 recovery has finished
925 */
926 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
927 struct ctdb_req_control *c,
928 bool *async_reply)
929 {
930 int ret;
931 struct recovery_callback_state *state;
932
933 DEBUG(DEBUG_NOTICE,("Recovery has finished\n"));
934
935 ctdb_persistent_finish_trans3_commits(ctdb);
936
937 state = talloc(ctdb, struct recovery_callback_state);
938 CTDB_NO_MEMORY(ctdb, state);
939
940 state->c = c;
941
942 ctdb_disable_monitoring(ctdb);
943
944 ret = ctdb_event_script_callback(ctdb, state,
945 ctdb_end_recovery_callback,
946 state,
947 CTDB_EVENT_RECOVERED, "%s", "");
948
949 if (ret != 0) {
950 ctdb_enable_monitoring(ctdb);
951
952 DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
953 talloc_free(state);
954 return -1;
955 }
956
957 /* tell the control that we will be reply asynchronously */
958 state->c = talloc_steal(state, c);
959 *async_reply = true;
960 return 0;
961 }
962
963 /*
964 called when the 'startrecovery' event script has finished
965 */
966 static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
967 {
968 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
969
970 if (status != 0) {
971 DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
972 }
973
974 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
975 talloc_free(state);
976 }
977
978 /*
979 run the startrecovery eventscript
980 */
981 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
982 struct ctdb_req_control *c,
983 bool *async_reply)
984 {
985 int ret;
986 struct recovery_callback_state *state;
987
988 DEBUG(DEBUG_NOTICE,(__location__ " startrecovery eventscript has been invoked\n"));
989 gettimeofday(&ctdb->last_recovery_started, NULL);
990
991 state = talloc(ctdb, struct recovery_callback_state);
992 CTDB_NO_MEMORY(ctdb, state);
993
994 state->c = talloc_steal(state, c);
995
996 ctdb_disable_monitoring(ctdb);
997
998 ret = ctdb_event_script_callback(ctdb, state,
999 ctdb_start_recovery_callback,
1000 state,
1001 CTDB_EVENT_START_RECOVERY,
1002 "%s", "");
1003
1004 if (ret != 0) {
1005 DEBUG(DEBUG_ERR,(__location__ " Failed to start recovery\n"));
1006 talloc_free(state);
1007 return -1;
1008 }
1009
1010 /* tell the control that we will be reply asynchronously */
1011 *async_reply = true;
1012 return 0;
1013 }
1014
1015 /*
1016 try to delete all these records as part of the vacuuming process
1017 and return the records we failed to delete
1018 */
1019 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1020 {
1021 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1022 struct ctdb_db_context *ctdb_db;
1023 int i;
1024 struct ctdb_rec_data *rec;
1025 struct ctdb_marshall_buffer *records;
1026
1027 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1028 DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
1029 return -1;
1030 }
1031
1032 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1033 if (!ctdb_db) {
1034 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
1035 return -1;
1036 }
1037
1038
1039 DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
1040 reply->count, reply->db_id));
1041
1042
1043 /* create a blob to send back the records we couldnt delete */
1044 records = (struct ctdb_marshall_buffer *)
1045 talloc_zero_size(outdata,
1046 offsetof(struct ctdb_marshall_buffer, data));
1047 if (records == NULL) {
1048 DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
1049 return -1;
1050 }
1051 records->db_id = ctdb_db->db_id;
1052
1053
1054 rec = (struct ctdb_rec_data *)&reply->data[0];
1055 for (i=0;i<reply->count;i++) {
1056 TDB_DATA key, data;
1057
1058 key.dptr = &rec->data[0];
1059 key.dsize = rec->keylen;
1060 data.dptr = &rec->data[key.dsize];
1061 data.dsize = rec->datalen;
1062
1063 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1064 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
1065 return -1;
1066 }
1067
1068 /* If we cant delete the record we must add it to the reply
1069 so the lmaster knows it may not purge this record
1070 */
1071 if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
1072 size_t old_size;
1073 struct ctdb_ltdb_header *hdr;
1074
1075 hdr = (struct ctdb_ltdb_header *)data.dptr;
1076 data.dptr += sizeof(*hdr);
1077 data.dsize -= sizeof(*hdr);
1078
1079 DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
1080
1081 old_size = talloc_get_size(records);
1082 records = talloc_realloc_size(outdata, records, old_size + rec->length);
1083 if (records == NULL) {
1084 DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
1085 return -1;
1086 }
1087 records->count++;
1088 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1089 }
1090
1091 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1092 }
1093
1094
1095 *outdata = ctdb_marshall_finish(records);
1096
1097 return 0;
1098 }
1099
1100 /**
1101 * Store a record as part of the vacuum process:
1102 * This is called from the RECEIVE_RECORD control which
1103 * the lmaster uses to send the current empty copy
1104 * to all nodes for storing, before it lets the other
1105 * nodes delete the records in the second phase with
1106 * the TRY_DELETE_RECORDS control.
1107 *
1108 * Only store if we are not lmaster or dmaster, and our
1109 * rsn is <= the provided rsn. Use non-blocking locks.
1110 *
1111 * return 0 if the record was successfully stored.
1112 * return !0 if the record still exists in the tdb after returning.
1113 */
1114 static int store_tdb_record(struct ctdb_context *ctdb,
1115 struct ctdb_db_context *ctdb_db,
1116 struct ctdb_rec_data *rec)
1117 {
1118 TDB_DATA key, data, data2;
1119 struct ctdb_ltdb_header *hdr, *hdr2;
1120 int ret;
1121
1122 key.dsize = rec->keylen;
1123 key.dptr = &rec->data[0];
1124 data.dsize = rec->datalen;
1125 data.dptr = &rec->data[rec->keylen];
1126
1127 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
1128 DEBUG(DEBUG_INFO, (__location__ " Called store_tdb_record "
1129 "where we are lmaster\n"));
1130 return -1;
1131 }
1132
1133 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
1134 DEBUG(DEBUG_ERR, (__location__ " Bad record size\n"));
1135 return -1;
1136 }
1137
1138 hdr = (struct ctdb_ltdb_header *)data.dptr;
1139
1140 /* use a non-blocking lock */
1141 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
1142 DEBUG(DEBUG_INFO, (__location__ " Failed to lock chain in non-blocking mode\n"));
1143 return -1;
1144 }
1145
1146 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
1147 if (data2.dptr == NULL || data2.dsize < sizeof(struct ctdb_ltdb_header)) {
1148 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) == -1) {
1149 DEBUG(DEBUG_ERR, (__location__ "Failed to store record\n"));
1150 ret = -1;
1151 goto done;
1152 }
1153 DEBUG(DEBUG_INFO, (__location__ " Stored record\n"));
1154 ret = 0;
1155 goto done;
1156 }
1157
1158 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
1159
1160 if (hdr2->rsn > hdr->rsn) {
1161 DEBUG(DEBUG_INFO, (__location__ " Skipping record with "
1162 "rsn=%llu - called with rsn=%llu\n",
1163 (unsigned long long)hdr2->rsn,
1164 (unsigned long long)hdr->rsn));
1165 ret = -1;
1166 goto done;
1167 }
1168
1169 /* do not allow vacuuming of records that have readonly flags set. */
1170 if (hdr->flags & CTDB_REC_RO_FLAGS) {
1171 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1172 "flags set\n"));
1173 ret = -1;
1174 goto done;
1175 }
1176 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
1177 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1178 "flags set\n"));
1179 ret = -1;
1180 goto done;
1181 }
1182
1183 if (hdr2->dmaster == ctdb->pnn) {
1184 DEBUG(DEBUG_INFO, (__location__ " Attempted to store record "
1185 "where we are the dmaster\n"));
1186 ret = -1;
1187 goto done;
1188 }
1189
1190 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) != 0) {
1191 DEBUG(DEBUG_INFO,(__location__ " Failed to store record\n"));
1192 ret = -1;
1193 goto done;
1194 }
1195
1196 ret = 0;
1197
1198 done:
1199 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1200 free(data2.dptr);
1201 return ret;
1202 }
1203
1204
1205
1206 /**
1207 * Try to store all these records as part of the vacuuming process
1208 * and return the records we failed to store.
1209 */
1210 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
1211 TDB_DATA indata, TDB_DATA *outdata)
1212 {
1213 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1214 struct ctdb_db_context *ctdb_db;
1215 int i;
1216 struct ctdb_rec_data *rec;
1217 struct ctdb_marshall_buffer *records;
1218
1219 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1220 DEBUG(DEBUG_ERR,
1221 (__location__ " invalid data in receive_records\n"));
1222 return -1;
1223 }
1224
1225 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1226 if (!ctdb_db) {
1227 DEBUG(DEBUG_ERR, (__location__ " Unknown db 0x%08x\n",
1228 reply->db_id));
1229 return -1;
1230 }
1231
1232 DEBUG(DEBUG_DEBUG, ("starting receive_records of %u records for "
1233 "dbid 0x%x\n", reply->count, reply->db_id));
1234
1235 /* create a blob to send back the records we could not store */
1236 records = (struct ctdb_marshall_buffer *)
1237 talloc_zero_size(outdata,
1238 offsetof(struct ctdb_marshall_buffer, data));
1239 if (records == NULL) {
1240 DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
1241 return -1;
1242 }
1243 records->db_id = ctdb_db->db_id;
1244
1245 rec = (struct ctdb_rec_data *)&reply->data[0];
1246 for (i=0; i<reply->count; i++) {
1247 TDB_DATA key, data;
1248
1249 key.dptr = &rec->data[0];
1250 key.dsize = rec->keylen;
1251 data.dptr = &rec->data[key.dsize];
1252 data.dsize = rec->datalen;
1253
1254 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1255 DEBUG(DEBUG_CRIT, (__location__ " bad ltdb record "
1256 "in indata\n"));
1257 return -1;
1258 }
1259
1260 /*
1261 * If we can not store the record we must add it to the reply
1262 * so the lmaster knows it may not purge this record.
1263 */
1264 if (store_tdb_record(ctdb, ctdb_db, rec) != 0) {
1265 size_t old_size;
1266 struct ctdb_ltdb_header *hdr;
1267
1268 hdr = (struct ctdb_ltdb_header *)data.dptr;
1269 data.dptr += sizeof(*hdr);
1270 data.dsize -= sizeof(*hdr);
1271
1272 DEBUG(DEBUG_INFO, (__location__ " Failed to store "
1273 "record with hash 0x%08x in vacuum "
1274 "via RECEIVE_RECORDS\n",
1275 ctdb_hash(&key)));
1276
1277 old_size = talloc_get_size(records);
1278 records = talloc_realloc_size(outdata, records,
1279 old_size + rec->length);
1280 if (records == NULL) {
1281 DEBUG(DEBUG_ERR, (__location__ " Failed to "
1282 "expand\n"));
1283 return -1;
1284 }
1285 records->count++;
1286 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1287 }
1288
1289 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1290 }
1291
1292 *outdata = ctdb_marshall_finish(records);
1293
1294 return 0;
1295 }
1296
1297
1298 /*
1299 report capabilities
1300 */
1301 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1302 {
1303 uint32_t *capabilities = NULL;
1304
1305 capabilities = talloc(outdata, uint32_t);
1306 CTDB_NO_MEMORY(ctdb, capabilities);
1307 *capabilities = ctdb->capabilities;
1308
1309 outdata->dsize = sizeof(uint32_t);
1310 outdata->dptr = (uint8_t *)capabilities;
1311
1312 return 0;
1313 }
1314
1315 /* The recovery daemon will ping us at regular intervals.
1316 If we havent been pinged for a while we assume the recovery
1317 daemon is inoperable and we restart.
1318 */
1319 static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1320 {
1321 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1322 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1323
1324 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1325
1326 if (*count < ctdb->tunable.recd_ping_failcount) {
1327 (*count)++;
1328 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1329 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1330 ctdb_recd_ping_timeout, ctdb);
1331 return;
1332 }
1333
1334 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
1335
1336 ctdb_stop_recoverd(ctdb);
1337 ctdb_start_recoverd(ctdb);
1338 }
1339
1340 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1341 {
1342 talloc_free(ctdb->recd_ping_count);
1343
1344 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1345 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1346
1347 if (ctdb->tunable.recd_ping_timeout != 0) {
1348 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1349 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1350 ctdb_recd_ping_timeout, ctdb);
1351 }
1352
1353 return 0;
1354 }
1355
1356
1357
1358 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1359 {
1360 uint32_t new_recmaster;
1361
1362 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1363 new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
1364
1365 if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
1366 DEBUG(DEBUG_NOTICE,
1367 ("This node (%u) is no longer the recovery master\n", ctdb->pnn));
1368 }
1369
1370 if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
1371 DEBUG(DEBUG_NOTICE,
1372 ("This node (%u) is now the recovery master\n", ctdb->pnn));
1373 }
1374
1375 ctdb->recovery_master = new_recmaster;
1376 return 0;
1377 }
1378
1379
1380 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
1381 {
1382 DEBUG(DEBUG_NOTICE, ("Stopping node\n"));
1383 ctdb_disable_monitoring(ctdb);
1384 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1385
1386 return 0;
1387 }
1388
1389 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1390 {
1391 DEBUG(DEBUG_NOTICE, ("Continue node\n"));
1392 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1393
1394 return 0;
1395 }
1396
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