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libcli: Avoid an explicit memset call
[Samba.git] / ctdb / server / ctdb_recover.c
blob7249f50ff4cdaf42eb6847e4f8554ee9765a9220
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 "db_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 CHECK_CONTROL_DATA_SIZE(0);
35 struct ctdb_vnn_map_wire *map;
36 size_t len;
37
38 len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*ctdb->vnn_map->size;
39 map = talloc_size(outdata, len);
40 CTDB_NO_MEMORY(ctdb, map);
41
42 map->generation = ctdb->vnn_map->generation;
43 map->size = ctdb->vnn_map->size;
44 memcpy(map->map, ctdb->vnn_map->map, sizeof(uint32_t)*map->size);
45
46 outdata->dsize = len;
47 outdata->dptr = (uint8_t *)map;
48
49 return 0;
50 }
51
52 int
53 ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
54 {
55 struct ctdb_vnn_map_wire *map = (struct ctdb_vnn_map_wire *)indata.dptr;
56 int i;
57
58 for(i=1; i<=NUM_DB_PRIORITIES; i++) {
59 if (ctdb->freeze_mode[i] != CTDB_FREEZE_FROZEN) {
60 DEBUG(DEBUG_ERR,("Attempt to set vnnmap when not frozen\n"));
61 return -1;
62 }
63 }
64
65 talloc_free(ctdb->vnn_map);
66
67 ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
68 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
69
70 ctdb->vnn_map->generation = map->generation;
71 ctdb->vnn_map->size = map->size;
72 ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, map->size);
73 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
74
75 memcpy(ctdb->vnn_map->map, map->map, sizeof(uint32_t)*map->size);
76
77 return 0;
78 }
79
80 int
81 ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
82 {
83 uint32_t i, len;
84 struct ctdb_db_context *ctdb_db;
85 struct ctdb_dbid_map *dbid_map;
86
87 CHECK_CONTROL_DATA_SIZE(0);
88
89 len = 0;
90 for(ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next){
91 len++;
92 }
93
94
95 outdata->dsize = offsetof(struct ctdb_dbid_map, dbs) + sizeof(dbid_map->dbs[0])*len;
96 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
97 if (!outdata->dptr) {
98 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate dbmap array\n"));
99 exit(1);
100 }
101
102 dbid_map = (struct ctdb_dbid_map *)outdata->dptr;
103 dbid_map->num = len;
104 for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
105 dbid_map->dbs[i].dbid = ctdb_db->db_id;
106 if (ctdb_db->persistent != 0) {
107 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_PERSISTENT;
108 }
109 if (ctdb_db->readonly != 0) {
110 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_READONLY;
111 }
112 if (ctdb_db->sticky != 0) {
113 dbid_map->dbs[i].flags |= CTDB_DB_FLAGS_STICKY;
114 }
115 }
116
117 return 0;
118 }
119
120 int
121 ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
122 {
123 uint32_t i, num_nodes;
124 struct ctdb_node_map *node_map;
125
126 CHECK_CONTROL_DATA_SIZE(0);
127
128 num_nodes = ctdb->num_nodes;
129
130 outdata->dsize = offsetof(struct ctdb_node_map, nodes) + num_nodes*sizeof(struct ctdb_node_and_flags);
131 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
132 if (!outdata->dptr) {
133 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
134 exit(1);
135 }
136
137 node_map = (struct ctdb_node_map *)outdata->dptr;
138 node_map->num = num_nodes;
139 for (i=0; i<num_nodes; i++) {
140 if (parse_ip(ctdb->nodes[i]->address.address,
141 NULL, /* TODO: pass in the correct interface here*/
142 0,
143 &node_map->nodes[i].addr) == 0)
144 {
145 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
146 }
147
148 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
149 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
150 }
151
152 return 0;
153 }
154
155 /*
156 get an old style ipv4-only nodemap
157 */
158 int
159 ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
160 {
161 uint32_t i, num_nodes;
162 struct ctdb_node_mapv4 *node_map;
163
164 CHECK_CONTROL_DATA_SIZE(0);
165
166 num_nodes = ctdb->num_nodes;
167
168 outdata->dsize = offsetof(struct ctdb_node_mapv4, nodes) + num_nodes*sizeof(struct ctdb_node_and_flagsv4);
169 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
170 if (!outdata->dptr) {
171 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
172 exit(1);
173 }
174
175 node_map = (struct ctdb_node_mapv4 *)outdata->dptr;
176 node_map->num = num_nodes;
177 for (i=0; i<num_nodes; i++) {
178 if (parse_ipv4(ctdb->nodes[i]->address.address, 0, &node_map->nodes[i].sin) == 0) {
179 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
180 return -1;
181 }
182
183 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
184 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
185 }
186
187 return 0;
188 }
189
190 static void
191 ctdb_reload_nodes_event(struct event_context *ev, struct timed_event *te,
192 struct timeval t, void *private_data)
193 {
194 int i, num_nodes;
195 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
196 TALLOC_CTX *tmp_ctx;
197 struct ctdb_node **nodes;
198
199 tmp_ctx = talloc_new(ctdb);
200
201 /* steal the old nodes file for a while */
202 talloc_steal(tmp_ctx, ctdb->nodes);
203 nodes = ctdb->nodes;
204 ctdb->nodes = NULL;
205 num_nodes = ctdb->num_nodes;
206 ctdb->num_nodes = 0;
207
208 /* load the new nodes file */
209 ctdb_load_nodes_file(ctdb);
210
211 for (i=0; i<ctdb->num_nodes; i++) {
212 /* keep any identical pre-existing nodes and connections */
213 if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
214 talloc_free(ctdb->nodes[i]);
215 ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
216 continue;
217 }
218
219 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
220 continue;
221 }
222
223 /* any new or different nodes must be added */
224 if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
225 DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
226 ctdb_fatal(ctdb, "failed to add node. shutting down\n");
227 }
228 if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
229 DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
230 ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
231 }
232 }
233
234 /* tell the recovery daemon to reaload the nodes file too */
235 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
236
237 talloc_free(tmp_ctx);
238 return;
239 }
240
241 /*
242 reload the nodes file after a short delay (so that we can send the response
243 back first
244 */
245 int
246 ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
247 {
248 event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(1,0), ctdb_reload_nodes_event, ctdb);
249
250 return 0;
251 }
252
253 /*
254 a traverse function for pulling all relevent records from pulldb
255 */
256 struct pulldb_data {
257 struct ctdb_context *ctdb;
258 struct ctdb_db_context *ctdb_db;
259 struct ctdb_marshall_buffer *pulldata;
260 uint32_t len;
261 uint32_t allocated_len;
262 bool failed;
263 };
264
265 static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
266 {
267 struct pulldb_data *params = (struct pulldb_data *)p;
268 struct ctdb_rec_data *rec;
269 struct ctdb_context *ctdb = params->ctdb;
270 struct ctdb_db_context *ctdb_db = params->ctdb_db;
271
272 /* add the record to the blob */
273 rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
274 if (rec == NULL) {
275 params->failed = true;
276 return -1;
277 }
278 if (params->len + rec->length >= params->allocated_len) {
279 params->allocated_len = rec->length + params->len + ctdb->tunable.pulldb_preallocation_size;
280 params->pulldata = talloc_realloc_size(NULL, params->pulldata, params->allocated_len);
281 }
282 if (params->pulldata == NULL) {
283 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
284 ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
285 }
286 params->pulldata->count++;
287 memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
288 params->len += rec->length;
289
290 if (ctdb->tunable.db_record_size_warn != 0 && rec->length > ctdb->tunable.db_record_size_warn) {
291 DEBUG(DEBUG_ERR,("Data record in %s is big. Record size is %d bytes\n", ctdb_db->db_name, (int)rec->length));
292 }
293
294 talloc_free(rec);
295
296 return 0;
297 }
298
299 /*
300 pull a bunch of records from a ltdb, filtering by lmaster
301 */
302 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
303 {
304 struct ctdb_control_pulldb *pull;
305 struct ctdb_db_context *ctdb_db;
306 struct pulldb_data params;
307 struct ctdb_marshall_buffer *reply;
308
309 pull = (struct ctdb_control_pulldb *)indata.dptr;
310
311 ctdb_db = find_ctdb_db(ctdb, pull->db_id);
312 if (!ctdb_db) {
313 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
314 return -1;
315 }
316
317 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
318 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_pull_db when not frozen\n"));
319 return -1;
320 }
321
322 reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
323 CTDB_NO_MEMORY(ctdb, reply);
324
325 reply->db_id = pull->db_id;
326
327 params.ctdb = ctdb;
328 params.ctdb_db = ctdb_db;
329 params.pulldata = reply;
330 params.len = offsetof(struct ctdb_marshall_buffer, data);
331 params.allocated_len = params.len;
332 params.failed = false;
333
334 if (ctdb_db->unhealthy_reason) {
335 /* this is just a warning, as the tdb should be empty anyway */
336 DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
337 ctdb_db->db_name, ctdb_db->unhealthy_reason));
338 }
339
340 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
341 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
342 return -1;
343 }
344
345 if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, &params) == -1) {
346 DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
347 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
348 talloc_free(params.pulldata);
349 return -1;
350 }
351
352 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
353
354 outdata->dptr = (uint8_t *)params.pulldata;
355 outdata->dsize = params.len;
356
357 if (ctdb->tunable.db_record_count_warn != 0 && params.pulldata->count > ctdb->tunable.db_record_count_warn) {
358 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d records\n", ctdb_db->db_name, params.pulldata->count));
359 }
360 if (ctdb->tunable.db_size_warn != 0 && outdata->dsize > ctdb->tunable.db_size_warn) {
361 DEBUG(DEBUG_ERR,("Database %s is big. Contains %d bytes\n", ctdb_db->db_name, (int)outdata->dsize));
362 }
363
364
365 return 0;
366 }
367
368 /*
369 push a bunch of records into a ltdb, filtering by rsn
370 */
371 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
372 {
373 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
374 struct ctdb_db_context *ctdb_db;
375 int i, ret;
376 struct ctdb_rec_data *rec;
377
378 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
379 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
380 return -1;
381 }
382
383 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
384 if (!ctdb_db) {
385 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
386 return -1;
387 }
388
389 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
390 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_push_db when not frozen\n"));
391 return -1;
392 }
393
394 if (ctdb_lockall_mark_prio(ctdb, ctdb_db->priority) != 0) {
395 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
396 return -1;
397 }
398
399 rec = (struct ctdb_rec_data *)&reply->data[0];
400
401 DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
402 reply->count, reply->db_id));
403
404 for (i=0;i<reply->count;i++) {
405 TDB_DATA key, data;
406 struct ctdb_ltdb_header *hdr;
407
408 key.dptr = &rec->data[0];
409 key.dsize = rec->keylen;
410 data.dptr = &rec->data[key.dsize];
411 data.dsize = rec->datalen;
412
413 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
414 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
415 goto failed;
416 }
417 hdr = (struct ctdb_ltdb_header *)data.dptr;
418 /* strip off any read only record flags. All readonly records
419 are revoked implicitely by a recovery
420 */
421 hdr->flags &= ~CTDB_REC_RO_FLAGS;
422
423 data.dptr += sizeof(*hdr);
424 data.dsize -= sizeof(*hdr);
425
426 ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
427 if (ret != 0) {
428 DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
429 goto failed;
430 }
431
432 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
433 }
434
435 DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
436 reply->count, reply->db_id));
437
438 if (ctdb_db->readonly) {
439 DEBUG(DEBUG_CRIT,("Clearing the tracking database for dbid 0x%x\n",
440 ctdb_db->db_id));
441 if (tdb_wipe_all(ctdb_db->rottdb) != 0) {
442 DEBUG(DEBUG_ERR,("Failed to wipe tracking database for 0x%x. Dropping read-only delegation support\n", ctdb_db->db_id));
443 ctdb_db->readonly = false;
444 tdb_close(ctdb_db->rottdb);
445 ctdb_db->rottdb = NULL;
446 ctdb_db->readonly = false;
447 }
448 while (ctdb_db->revokechild_active != NULL) {
449 talloc_free(ctdb_db->revokechild_active);
450 }
451 }
452
453 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
454 return 0;
455
456 failed:
457 ctdb_lockall_unmark_prio(ctdb, ctdb_db->priority);
458 return -1;
459 }
460
461 struct ctdb_set_recmode_state {
462 struct ctdb_context *ctdb;
463 struct ctdb_req_control *c;
464 uint32_t recmode;
465 int fd[2];
466 struct timed_event *te;
467 struct fd_event *fde;
468 pid_t child;
469 struct timeval start_time;
470 };
471
472 /*
473 called if our set_recmode child times out. this would happen if
474 ctdb_recovery_lock() would block.
475 */
476 static void ctdb_set_recmode_timeout(struct event_context *ev, struct timed_event *te,
477 struct timeval t, void *private_data)
478 {
479 struct ctdb_set_recmode_state *state = talloc_get_type(private_data,
480 struct ctdb_set_recmode_state);
481
482 /* we consider this a success, not a failure, as we failed to
483 set the recovery lock which is what we wanted. This can be
484 caused by the cluster filesystem being very slow to
485 arbitrate locks immediately after a node failure.
486 */
487 DEBUG(DEBUG_ERR,(__location__ " set_recmode child process hung/timedout CFS slow to grant locks? (allowing recmode set anyway)\n"));
488 state->ctdb->recovery_mode = state->recmode;
489 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
490 talloc_free(state);
491 }
492
493
494 /* when we free the recmode state we must kill any child process.
495 */
496 static int set_recmode_destructor(struct ctdb_set_recmode_state *state)
497 {
498 double l = timeval_elapsed(&state->start_time);
499
500 CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock", reclock.ctdbd, l);
501
502 if (state->fd[0] != -1) {
503 state->fd[0] = -1;
504 }
505 if (state->fd[1] != -1) {
506 state->fd[1] = -1;
507 }
508 ctdb_kill(state->ctdb, state->child, SIGKILL);
509 return 0;
510 }
511
512 /* this is called when the client process has completed ctdb_recovery_lock()
513 and has written data back to us through the pipe.
514 */
515 static void set_recmode_handler(struct event_context *ev, struct fd_event *fde,
516 uint16_t flags, void *private_data)
517 {
518 struct ctdb_set_recmode_state *state= talloc_get_type(private_data,
519 struct ctdb_set_recmode_state);
520 char c = 0;
521 int ret;
522
523 /* we got a response from our child process so we can abort the
524 timeout.
525 */
526 talloc_free(state->te);
527 state->te = NULL;
528
529
530 /* read the childs status when trying to lock the reclock file.
531 child wrote 0 if everything is fine and 1 if it did manage
532 to lock the file, which would be a problem since that means
533 we got a request to exit from recovery but we could still lock
534 the file which at this time SHOULD be locked by the recovery
535 daemon on the recmaster
536 */
537 ret = read(state->fd[0], &c, 1);
538 if (ret != 1 || c != 0) {
539 ctdb_request_control_reply(state->ctdb, state->c, NULL, -1, "managed to lock reclock file from inside daemon");
540 talloc_free(state);
541 return;
542 }
543
544 state->ctdb->recovery_mode = state->recmode;
545
546 /* release any deferred attach calls from clients */
547 if (state->recmode == CTDB_RECOVERY_NORMAL) {
548 ctdb_process_deferred_attach(state->ctdb);
549 }
550
551 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
552 talloc_free(state);
553 return;
554 }
555
556 static void
557 ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te,
558 struct timeval t, void *private_data)
559 {
560 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
561
562 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
563 talloc_free(ctdb->release_ips_ctx);
564 ctdb->release_ips_ctx = NULL;
565
566 ctdb_release_all_ips(ctdb);
567 }
568
569 /*
570 * Set up an event to drop all public ips if we remain in recovery for too
571 * long
572 */
573 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
574 {
575 if (ctdb->release_ips_ctx != NULL) {
576 talloc_free(ctdb->release_ips_ctx);
577 }
578 ctdb->release_ips_ctx = talloc_new(ctdb);
579 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
580
581 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);
582 return 0;
583 }
584
585 /*
586 set the recovery mode
587 */
588 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
589 struct ctdb_req_control *c,
590 TDB_DATA indata, bool *async_reply,
591 const char **errormsg)
592 {
593 uint32_t recmode = *(uint32_t *)indata.dptr;
594 int i, ret;
595 struct ctdb_set_recmode_state *state;
596 pid_t parent = getpid();
597
598 /* if we enter recovery but stay in recovery for too long
599 we will eventually drop all our ip addresses
600 */
601 if (recmode == CTDB_RECOVERY_NORMAL) {
602 talloc_free(ctdb->release_ips_ctx);
603 ctdb->release_ips_ctx = NULL;
604 } else {
605 if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
606 DEBUG(DEBUG_ERR,("Failed to set up deferred drop all ips\n"));
607 }
608 }
609
610 if (recmode != ctdb->recovery_mode) {
611 DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n",
612 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
613 }
614
615 if (recmode != CTDB_RECOVERY_NORMAL ||
616 ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
617 ctdb->recovery_mode = recmode;
618 return 0;
619 }
620
621 /* some special handling when ending recovery mode */
622
623 /* force the databases to thaw */
624 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
625 if (ctdb->freeze_handles[i] != NULL) {
626 ctdb_control_thaw(ctdb, i);
627 }
628 }
629
630 state = talloc(ctdb, struct ctdb_set_recmode_state);
631 CTDB_NO_MEMORY(ctdb, state);
632
633 state->start_time = timeval_current();
634 state->fd[0] = -1;
635 state->fd[1] = -1;
636
637 /* release any deferred attach calls from clients */
638 if (recmode == CTDB_RECOVERY_NORMAL) {
639 ctdb_process_deferred_attach(ctdb);
640 }
641
642 if (ctdb->tunable.verify_recovery_lock == 0) {
643 /* dont need to verify the reclock file */
644 ctdb->recovery_mode = recmode;
645 return 0;
646 }
647
648 /* For the rest of what needs to be done, we need to do this in
649 a child process since
650 1, the call to ctdb_recovery_lock() can block if the cluster
651 filesystem is in the process of recovery.
652 */
653 ret = pipe(state->fd);
654 if (ret != 0) {
655 talloc_free(state);
656 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
657 return -1;
658 }
659
660 state->child = ctdb_fork(ctdb);
661 if (state->child == (pid_t)-1) {
662 close(state->fd[0]);
663 close(state->fd[1]);
664 talloc_free(state);
665 return -1;
666 }
667
668 if (state->child == 0) {
669 char cc = 0;
670 close(state->fd[0]);
671
672 ctdb_set_process_name("ctdb_recmode");
673 debug_extra = talloc_asprintf(NULL, "set_recmode:");
674 /* we should not be able to get the lock on the reclock file,
675 as it should be held by the recovery master
676 */
677 if (ctdb_recovery_lock(ctdb, false)) {
678 DEBUG(DEBUG_CRIT,("ERROR: recovery lock file %s not locked when recovering!\n", ctdb->recovery_lock_file));
679 cc = 1;
680 }
681
682 write(state->fd[1], &cc, 1);
683 /* make sure we die when our parent dies */
684 while (ctdb_kill(ctdb, parent, 0) == 0 || errno != ESRCH) {
685 sleep(5);
686 write(state->fd[1], &cc, 1);
687 }
688 _exit(0);
689 }
690 close(state->fd[1]);
691 set_close_on_exec(state->fd[0]);
692
693 state->fd[1] = -1;
694
695 talloc_set_destructor(state, set_recmode_destructor);
696
697 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
698
699 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
700 ctdb_set_recmode_timeout, state);
701
702 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
703 EVENT_FD_READ,
704 set_recmode_handler,
705 (void *)state);
706
707 if (state->fde == NULL) {
708 talloc_free(state);
709 return -1;
710 }
711 tevent_fd_set_auto_close(state->fde);
712
713 state->ctdb = ctdb;
714 state->recmode = recmode;
715 state->c = talloc_steal(state, c);
716
717 *async_reply = true;
718
719 return 0;
720 }
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, bool keep)
728 {
729 struct flock lock;
730
731 if (keep) {
732 DEBUG(DEBUG_ERR, ("Take the recovery lock\n"));
733 }
734 if (ctdb->recovery_lock_fd != -1) {
735 close(ctdb->recovery_lock_fd);
736 ctdb->recovery_lock_fd = -1;
737 }
738
739 ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file, O_RDWR|O_CREAT, 0600);
740 if (ctdb->recovery_lock_fd == -1) {
741 DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Unable to open %s - (%s)\n",
742 ctdb->recovery_lock_file, strerror(errno)));
743 return false;
744 }
745
746 set_close_on_exec(ctdb->recovery_lock_fd);
747
748 lock.l_type = F_WRLCK;
749 lock.l_whence = SEEK_SET;
750 lock.l_start = 0;
751 lock.l_len = 1;
752 lock.l_pid = 0;
753
754 if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
755 close(ctdb->recovery_lock_fd);
756 ctdb->recovery_lock_fd = -1;
757 if (keep) {
758 DEBUG(DEBUG_CRIT,("ctdb_recovery_lock: Failed to get recovery lock on '%s'\n", ctdb->recovery_lock_file));
759 }
760 return false;
761 }
762
763 if (!keep) {
764 close(ctdb->recovery_lock_fd);
765 ctdb->recovery_lock_fd = -1;
766 }
767
768 if (keep) {
769 DEBUG(DEBUG_NOTICE, ("Recovery lock taken successfully\n"));
770 }
771
772 DEBUG(DEBUG_NOTICE,("ctdb_recovery_lock: Got recovery lock on '%s'\n", ctdb->recovery_lock_file));
773
774 return true;
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->dptr = (uint8_t *)records;
1096 outdata->dsize = talloc_get_size(records);
1097
1098 return 0;
1099 }
1100
1101 /**
1102 * Store a record as part of the vacuum process:
1103 * This is called from the RECEIVE_RECORD control which
1104 * the lmaster uses to send the current empty copy
1105 * to all nodes for storing, before it lets the other
1106 * nodes delete the records in the second phase with
1107 * the TRY_DELETE_RECORDS control.
1108 *
1109 * Only store if we are not lmaster or dmaster, and our
1110 * rsn is <= the provided rsn. Use non-blocking locks.
1111 *
1112 * return 0 if the record was successfully stored.
1113 * return !0 if the record still exists in the tdb after returning.
1114 */
1115 static int store_tdb_record(struct ctdb_context *ctdb,
1116 struct ctdb_db_context *ctdb_db,
1117 struct ctdb_rec_data *rec)
1118 {
1119 TDB_DATA key, data, data2;
1120 struct ctdb_ltdb_header *hdr, *hdr2;
1121 int ret;
1122
1123 key.dsize = rec->keylen;
1124 key.dptr = &rec->data[0];
1125 data.dsize = rec->datalen;
1126 data.dptr = &rec->data[rec->keylen];
1127
1128 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
1129 DEBUG(DEBUG_INFO, (__location__ " Called store_tdb_record "
1130 "where we are lmaster\n"));
1131 return -1;
1132 }
1133
1134 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
1135 DEBUG(DEBUG_ERR, (__location__ " Bad record size\n"));
1136 return -1;
1137 }
1138
1139 hdr = (struct ctdb_ltdb_header *)data.dptr;
1140
1141 /* use a non-blocking lock */
1142 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
1143 DEBUG(DEBUG_INFO, (__location__ " Failed to lock chain in non-blocking mode\n"));
1144 return -1;
1145 }
1146
1147 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
1148 if (data2.dptr == NULL || data2.dsize < sizeof(struct ctdb_ltdb_header)) {
1149 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) == -1) {
1150 DEBUG(DEBUG_ERR, (__location__ "Failed to store record\n"));
1151 ret = -1;
1152 goto done;
1153 }
1154 DEBUG(DEBUG_INFO, (__location__ " Stored record\n"));
1155 ret = 0;
1156 goto done;
1157 }
1158
1159 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
1160
1161 if (hdr2->rsn > hdr->rsn) {
1162 DEBUG(DEBUG_INFO, (__location__ " Skipping record with "
1163 "rsn=%llu - called with rsn=%llu\n",
1164 (unsigned long long)hdr2->rsn,
1165 (unsigned long long)hdr->rsn));
1166 ret = -1;
1167 goto done;
1168 }
1169
1170 /* do not allow vacuuming of records that have readonly flags set. */
1171 if (hdr->flags & CTDB_REC_RO_FLAGS) {
1172 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1173 "flags set\n"));
1174 ret = -1;
1175 goto done;
1176 }
1177 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
1178 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly "
1179 "flags set\n"));
1180 ret = -1;
1181 goto done;
1182 }
1183
1184 if (hdr2->dmaster == ctdb->pnn) {
1185 DEBUG(DEBUG_INFO, (__location__ " Attempted to store record "
1186 "where we are the dmaster\n"));
1187 ret = -1;
1188 goto done;
1189 }
1190
1191 if (tdb_store(ctdb_db->ltdb->tdb, key, data, 0) != 0) {
1192 DEBUG(DEBUG_INFO,(__location__ " Failed to store record\n"));
1193 ret = -1;
1194 goto done;
1195 }
1196
1197 ret = 0;
1198
1199 done:
1200 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
1201 free(data2.dptr);
1202 return ret;
1203 }
1204
1205
1206
1207 /**
1208 * Try to store all these records as part of the vacuuming process
1209 * and return the records we failed to store.
1210 */
1211 int32_t ctdb_control_receive_records(struct ctdb_context *ctdb,
1212 TDB_DATA indata, TDB_DATA *outdata)
1213 {
1214 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1215 struct ctdb_db_context *ctdb_db;
1216 int i;
1217 struct ctdb_rec_data *rec;
1218 struct ctdb_marshall_buffer *records;
1219
1220 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1221 DEBUG(DEBUG_ERR,
1222 (__location__ " invalid data in receive_records\n"));
1223 return -1;
1224 }
1225
1226 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1227 if (!ctdb_db) {
1228 DEBUG(DEBUG_ERR, (__location__ " Unknown db 0x%08x\n",
1229 reply->db_id));
1230 return -1;
1231 }
1232
1233 DEBUG(DEBUG_DEBUG, ("starting receive_records of %u records for "
1234 "dbid 0x%x\n", reply->count, reply->db_id));
1235
1236 /* create a blob to send back the records we could not store */
1237 records = (struct ctdb_marshall_buffer *)
1238 talloc_zero_size(outdata,
1239 offsetof(struct ctdb_marshall_buffer, data));
1240 if (records == NULL) {
1241 DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
1242 return -1;
1243 }
1244 records->db_id = ctdb_db->db_id;
1245
1246 rec = (struct ctdb_rec_data *)&reply->data[0];
1247 for (i=0; i<reply->count; i++) {
1248 TDB_DATA key, data;
1249
1250 key.dptr = &rec->data[0];
1251 key.dsize = rec->keylen;
1252 data.dptr = &rec->data[key.dsize];
1253 data.dsize = rec->datalen;
1254
1255 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1256 DEBUG(DEBUG_CRIT, (__location__ " bad ltdb record "
1257 "in indata\n"));
1258 return -1;
1259 }
1260
1261 /*
1262 * If we can not store the record we must add it to the reply
1263 * so the lmaster knows it may not purge this record.
1264 */
1265 if (store_tdb_record(ctdb, ctdb_db, rec) != 0) {
1266 size_t old_size;
1267 struct ctdb_ltdb_header *hdr;
1268
1269 hdr = (struct ctdb_ltdb_header *)data.dptr;
1270 data.dptr += sizeof(*hdr);
1271 data.dsize -= sizeof(*hdr);
1272
1273 DEBUG(DEBUG_INFO, (__location__ " Failed to store "
1274 "record with hash 0x%08x in vacuum "
1275 "via RECEIVE_RECORDS\n",
1276 ctdb_hash(&key)));
1277
1278 old_size = talloc_get_size(records);
1279 records = talloc_realloc_size(outdata, records,
1280 old_size + rec->length);
1281 if (records == NULL) {
1282 DEBUG(DEBUG_ERR, (__location__ " Failed to "
1283 "expand\n"));
1284 return -1;
1285 }
1286 records->count++;
1287 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1288 }
1289
1290 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1291 }
1292
1293
1294 outdata->dptr = (uint8_t *)records;
1295 outdata->dsize = talloc_get_size(records);
1296
1297 return 0;
1298 }
1299
1300
1301 /*
1302 report capabilities
1303 */
1304 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1305 {
1306 uint32_t *capabilities = NULL;
1307
1308 capabilities = talloc(outdata, uint32_t);
1309 CTDB_NO_MEMORY(ctdb, capabilities);
1310 *capabilities = ctdb->capabilities;
1311
1312 outdata->dsize = sizeof(uint32_t);
1313 outdata->dptr = (uint8_t *)capabilities;
1314
1315 return 0;
1316 }
1317
1318 /* The recovery daemon will ping us at regular intervals.
1319 If we havent been pinged for a while we assume the recovery
1320 daemon is inoperable and we restart.
1321 */
1322 static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1323 {
1324 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1325 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1326
1327 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1328
1329 if (*count < ctdb->tunable.recd_ping_failcount) {
1330 (*count)++;
1331 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1332 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1333 ctdb_recd_ping_timeout, ctdb);
1334 return;
1335 }
1336
1337 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
1338
1339 ctdb_stop_recoverd(ctdb);
1340 ctdb_start_recoverd(ctdb);
1341 }
1342
1343 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1344 {
1345 talloc_free(ctdb->recd_ping_count);
1346
1347 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1348 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1349
1350 if (ctdb->tunable.recd_ping_timeout != 0) {
1351 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1352 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1353 ctdb_recd_ping_timeout, ctdb);
1354 }
1355
1356 return 0;
1357 }
1358
1359
1360
1361 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1362 {
1363 uint32_t new_recmaster;
1364
1365 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1366 new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
1367
1368 if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
1369 DEBUG(DEBUG_NOTICE,
1370 ("This node (%u) is no longer the recovery master\n", ctdb->pnn));
1371 }
1372
1373 if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
1374 DEBUG(DEBUG_NOTICE,
1375 ("This node (%u) is now the recovery master\n", ctdb->pnn));
1376 }
1377
1378 ctdb->recovery_master = new_recmaster;
1379 return 0;
1380 }
1381
1382
1383 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
1384 {
1385 DEBUG(DEBUG_NOTICE, ("Stopping node\n"));
1386 ctdb_disable_monitoring(ctdb);
1387 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1388
1389 return 0;
1390 }
1391
1392 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1393 {
1394 DEBUG(DEBUG_NOTICE, ("Continue node\n"));
1395 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1396
1397 return 0;
1398 }
1399
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