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s3:unix_msg: use a buffer pointer instead of array indexes for the iov buffer
[Samba.git] / ctdb / server / ctdb_recover.c
blobc26a048c8bbf43597594ca83f0ba45f6de057dcd
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 /* read the childs status when trying to lock the reclock file.
532 child wrote 0 if everything is fine and 1 if it did manage
533 to lock the file, which would be a problem since that means
534 we got a request to exit from recovery but we could still lock
535 the file which at this time SHOULD be locked by the recovery
536 daemon on the recmaster
537 */
538 ret = sys_read(state->fd[0], &c, 1);
539 if (ret != 1 || c != 0) {
540 ctdb_request_control_reply(state->ctdb, state->c, NULL, -1, "managed to lock reclock file from inside daemon");
541 talloc_free(state);
542 return;
543 }
544
545 state->ctdb->recovery_mode = state->recmode;
546
547 /* release any deferred attach calls from clients */
548 if (state->recmode == CTDB_RECOVERY_NORMAL) {
549 ctdb_process_deferred_attach(state->ctdb);
550 }
551
552 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
553 talloc_free(state);
554 return;
555 }
556
557 static void
558 ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te,
559 struct timeval t, void *private_data)
560 {
561 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
562
563 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
564 talloc_free(ctdb->release_ips_ctx);
565 ctdb->release_ips_ctx = NULL;
566
567 ctdb_release_all_ips(ctdb);
568 }
569
570 /*
571 * Set up an event to drop all public ips if we remain in recovery for too
572 * long
573 */
574 int ctdb_deferred_drop_all_ips(struct ctdb_context *ctdb)
575 {
576 if (ctdb->release_ips_ctx != NULL) {
577 talloc_free(ctdb->release_ips_ctx);
578 }
579 ctdb->release_ips_ctx = talloc_new(ctdb);
580 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
581
582 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);
583 return 0;
584 }
585
586 /*
587 set the recovery mode
588 */
589 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
590 struct ctdb_req_control *c,
591 TDB_DATA indata, bool *async_reply,
592 const char **errormsg)
593 {
594 uint32_t recmode = *(uint32_t *)indata.dptr;
595 int i, ret;
596 struct ctdb_set_recmode_state *state;
597 pid_t parent = getpid();
598
599 /* if we enter recovery but stay in recovery for too long
600 we will eventually drop all our ip addresses
601 */
602 if (recmode == CTDB_RECOVERY_NORMAL) {
603 talloc_free(ctdb->release_ips_ctx);
604 ctdb->release_ips_ctx = NULL;
605 } else {
606 if (ctdb_deferred_drop_all_ips(ctdb) != 0) {
607 DEBUG(DEBUG_ERR,("Failed to set up deferred drop all ips\n"));
608 }
609 }
610
611 if (recmode != ctdb->recovery_mode) {
612 DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n",
613 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
614 }
615
616 if (recmode != CTDB_RECOVERY_NORMAL ||
617 ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
618 ctdb->recovery_mode = recmode;
619 return 0;
620 }
621
622 /* some special handling when ending recovery mode */
623
624 /* force the databases to thaw */
625 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
626 if (ctdb->freeze_handles[i] != NULL) {
627 ctdb_control_thaw(ctdb, i, false);
628 }
629 }
630
631 state = talloc(ctdb, struct ctdb_set_recmode_state);
632 CTDB_NO_MEMORY(ctdb, state);
633
634 state->start_time = timeval_current();
635 state->fd[0] = -1;
636 state->fd[1] = -1;
637
638 /* release any deferred attach calls from clients */
639 if (recmode == CTDB_RECOVERY_NORMAL) {
640 ctdb_process_deferred_attach(ctdb);
641 }
642
643 if (ctdb->tunable.verify_recovery_lock == 0) {
644 /* dont need to verify the reclock file */
645 ctdb->recovery_mode = recmode;
646 return 0;
647 }
648
649 /* For the rest of what needs to be done, we need to do this in
650 a child process since
651 1, the call to ctdb_recovery_lock() can block if the cluster
652 filesystem is in the process of recovery.
653 */
654 ret = pipe(state->fd);
655 if (ret != 0) {
656 talloc_free(state);
657 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
658 return -1;
659 }
660
661 state->child = ctdb_fork(ctdb);
662 if (state->child == (pid_t)-1) {
663 close(state->fd[0]);
664 close(state->fd[1]);
665 talloc_free(state);
666 return -1;
667 }
668
669 if (state->child == 0) {
670 char cc = 0;
671 close(state->fd[0]);
672
673 ctdb_set_process_name("ctdb_recmode");
674 debug_extra = talloc_asprintf(NULL, "set_recmode:");
675 /* we should not be able to get the lock on the reclock file,
676 as it should be held by the recovery master
677 */
678 if (ctdb_recovery_lock(ctdb, false)) {
679 DEBUG(DEBUG_CRIT,("ERROR: recovery lock file %s not locked when recovering!\n", ctdb->recovery_lock_file));
680 cc = 1;
681 }
682
683 sys_write(state->fd[1], &cc, 1);
684 /* make sure we die when our parent dies */
685 while (ctdb_kill(ctdb, parent, 0) == 0 || errno != ESRCH) {
686 sleep(5);
687 sys_write(state->fd[1], &cc, 1);
688 }
689 _exit(0);
690 }
691 close(state->fd[1]);
692 set_close_on_exec(state->fd[0]);
693
694 state->fd[1] = -1;
695
696 talloc_set_destructor(state, set_recmode_destructor);
697
698 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
699
700 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
701 ctdb_set_recmode_timeout, state);
702
703 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
704 EVENT_FD_READ,
705 set_recmode_handler,
706 (void *)state);
707
708 if (state->fde == NULL) {
709 talloc_free(state);
710 return -1;
711 }
712 tevent_fd_set_auto_close(state->fde);
713
714 state->ctdb = ctdb;
715 state->recmode = recmode;
716 state->c = talloc_steal(state, c);
717
718 *async_reply = true;
719
720 return 0;
721 }
722
723
724 /*
725 try and get the recovery lock in shared storage - should only work
726 on the recovery master recovery daemon. Anywhere else is a bug
727 */
728 bool ctdb_recovery_lock(struct ctdb_context *ctdb, bool keep)
729 {
730 struct flock lock;
731
732 if (keep) {
733 DEBUG(DEBUG_ERR, ("Take the recovery lock\n"));
734 }
735 if (ctdb->recovery_lock_fd != -1) {
736 close(ctdb->recovery_lock_fd);
737 ctdb->recovery_lock_fd = -1;
738 }
739
740 ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file, O_RDWR|O_CREAT, 0600);
741 if (ctdb->recovery_lock_fd == -1) {
742 DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Unable to open %s - (%s)\n",
743 ctdb->recovery_lock_file, strerror(errno)));
744 return false;
745 }
746
747 set_close_on_exec(ctdb->recovery_lock_fd);
748
749 lock.l_type = F_WRLCK;
750 lock.l_whence = SEEK_SET;
751 lock.l_start = 0;
752 lock.l_len = 1;
753 lock.l_pid = 0;
754
755 if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
756 close(ctdb->recovery_lock_fd);
757 ctdb->recovery_lock_fd = -1;
758 if (keep) {
759 DEBUG(DEBUG_CRIT,("ctdb_recovery_lock: Failed to get recovery lock on '%s'\n", ctdb->recovery_lock_file));
760 }
761 return false;
762 }
763
764 if (!keep) {
765 close(ctdb->recovery_lock_fd);
766 ctdb->recovery_lock_fd = -1;
767 }
768
769 if (keep) {
770 DEBUG(DEBUG_NOTICE, ("Recovery lock taken successfully\n"));
771 }
772
773 DEBUG(DEBUG_NOTICE,("ctdb_recovery_lock: Got recovery lock on '%s'\n", ctdb->recovery_lock_file));
774
775 return true;
776 }
777
778 /*
779 delete a record as part of the vacuum process
780 only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
781 use non-blocking locks
782
783 return 0 if the record was successfully deleted (i.e. it does not exist
784 when the function returns)
785 or !0 is the record still exists in the tdb after returning.
786 */
787 static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data *rec)
788 {
789 TDB_DATA key, data, data2;
790 struct ctdb_ltdb_header *hdr, *hdr2;
791
792 /* these are really internal tdb functions - but we need them here for
793 non-blocking lock of the freelist */
794 int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
795 int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
796
797
798 key.dsize = rec->keylen;
799 key.dptr = &rec->data[0];
800 data.dsize = rec->datalen;
801 data.dptr = &rec->data[rec->keylen];
802
803 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
804 DEBUG(DEBUG_INFO,(__location__ " Called delete on record where we are lmaster\n"));
805 return -1;
806 }
807
808 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
809 DEBUG(DEBUG_ERR,(__location__ " Bad record size\n"));
810 return -1;
811 }
812
813 hdr = (struct ctdb_ltdb_header *)data.dptr;
814
815 /* use a non-blocking lock */
816 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
817 return -1;
818 }
819
820 data2 = tdb_fetch(ctdb_db->ltdb->tdb, key);
821 if (data2.dptr == NULL) {
822 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
823 return 0;
824 }
825
826 if (data2.dsize < sizeof(struct ctdb_ltdb_header)) {
827 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
828 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
829 DEBUG(DEBUG_CRIT,(__location__ " Failed to delete corrupt record\n"));
830 }
831 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
832 DEBUG(DEBUG_CRIT,(__location__ " Deleted corrupt record\n"));
833 }
834 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
835 free(data2.dptr);
836 return 0;
837 }
838
839 hdr2 = (struct ctdb_ltdb_header *)data2.dptr;
840
841 if (hdr2->rsn > hdr->rsn) {
842 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
843 DEBUG(DEBUG_INFO,(__location__ " Skipping record with rsn=%llu - called with rsn=%llu\n",
844 (unsigned long long)hdr2->rsn, (unsigned long long)hdr->rsn));
845 free(data2.dptr);
846 return -1;
847 }
848
849 /* do not allow deleting record that have readonly flags set. */
850 if (hdr->flags & CTDB_REC_RO_FLAGS) {
851 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
852 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
853 free(data2.dptr);
854 return -1;
855 }
856 if (hdr2->flags & CTDB_REC_RO_FLAGS) {
857 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
858 DEBUG(DEBUG_INFO,(__location__ " Skipping record with readonly flags set\n"));
859 free(data2.dptr);
860 return -1;
861 }
862
863 if (hdr2->dmaster == ctdb->pnn) {
864 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
865 DEBUG(DEBUG_INFO,(__location__ " Attempted delete record where we are the dmaster\n"));
866 free(data2.dptr);
867 return -1;
868 }
869
870 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
871 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
872 free(data2.dptr);
873 return -1;
874 }
875
876 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
877 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
878 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
879 DEBUG(DEBUG_INFO,(__location__ " Failed to delete record\n"));
880 free(data2.dptr);
881 return -1;
882 }
883
884 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
885 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
886 free(data2.dptr);
887 return 0;
888 }
889
890
891
892 struct recovery_callback_state {
893 struct ctdb_req_control *c;
894 };
895
896
897 /*
898 called when the 'recovered' event script has finished
899 */
900 static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
901 {
902 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
903
904 ctdb_enable_monitoring(ctdb);
905 CTDB_INCREMENT_STAT(ctdb, num_recoveries);
906
907 if (status != 0) {
908 DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
909 if (status == -ETIME) {
910 ctdb_ban_self(ctdb);
911 }
912 }
913
914 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
915 talloc_free(state);
916
917 gettimeofday(&ctdb->last_recovery_finished, NULL);
918
919 if (ctdb->runstate == CTDB_RUNSTATE_FIRST_RECOVERY) {
920 ctdb_set_runstate(ctdb, CTDB_RUNSTATE_STARTUP);
921 }
922 }
923
924 /*
925 recovery has finished
926 */
927 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
928 struct ctdb_req_control *c,
929 bool *async_reply)
930 {
931 int ret;
932 struct recovery_callback_state *state;
933
934 DEBUG(DEBUG_NOTICE,("Recovery has finished\n"));
935
936 ctdb_persistent_finish_trans3_commits(ctdb);
937
938 state = talloc(ctdb, struct recovery_callback_state);
939 CTDB_NO_MEMORY(ctdb, state);
940
941 state->c = c;
942
943 ctdb_disable_monitoring(ctdb);
944
945 ret = ctdb_event_script_callback(ctdb, state,
946 ctdb_end_recovery_callback,
947 state,
948 CTDB_EVENT_RECOVERED, "%s", "");
949
950 if (ret != 0) {
951 ctdb_enable_monitoring(ctdb);
952
953 DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
954 talloc_free(state);
955 return -1;
956 }
957
958 /* tell the control that we will be reply asynchronously */
959 state->c = talloc_steal(state, c);
960 *async_reply = true;
961 return 0;
962 }
963
964 /*
965 called when the 'startrecovery' event script has finished
966 */
967 static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
968 {
969 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
970
971 if (status != 0) {
972 DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
973 }
974
975 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
976 talloc_free(state);
977 }
978
979 /*
980 run the startrecovery eventscript
981 */
982 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
983 struct ctdb_req_control *c,
984 bool *async_reply)
985 {
986 int ret;
987 struct recovery_callback_state *state;
988
989 DEBUG(DEBUG_NOTICE,(__location__ " startrecovery eventscript has been invoked\n"));
990 gettimeofday(&ctdb->last_recovery_started, NULL);
991
992 state = talloc(ctdb, struct recovery_callback_state);
993 CTDB_NO_MEMORY(ctdb, state);
994
995 state->c = talloc_steal(state, c);
996
997 ctdb_disable_monitoring(ctdb);
998
999 ret = ctdb_event_script_callback(ctdb, state,
1000 ctdb_start_recovery_callback,
1001 state,
1002 CTDB_EVENT_START_RECOVERY,
1003 "%s", "");
1004
1005 if (ret != 0) {
1006 DEBUG(DEBUG_ERR,(__location__ " Failed to start recovery\n"));
1007 talloc_free(state);
1008 return -1;
1009 }
1010
1011 /* tell the control that we will be reply asynchronously */
1012 *async_reply = true;
1013 return 0;
1014 }
1015
1016 /*
1017 try to delete all these records as part of the vacuuming process
1018 and return the records we failed to delete
1019 */
1020 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1021 {
1022 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1023 struct ctdb_db_context *ctdb_db;
1024 int i;
1025 struct ctdb_rec_data *rec;
1026 struct ctdb_marshall_buffer *records;
1027
1028 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1029 DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
1030 return -1;
1031 }
1032
1033 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1034 if (!ctdb_db) {
1035 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
1036 return -1;
1037 }
1038
1039
1040 DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
1041 reply->count, reply->db_id));
1042
1043
1044 /* create a blob to send back the records we couldnt delete */
1045 records = (struct ctdb_marshall_buffer *)
1046 talloc_zero_size(outdata,
1047 offsetof(struct ctdb_marshall_buffer, data));
1048 if (records == NULL) {
1049 DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
1050 return -1;
1051 }
1052 records->db_id = ctdb_db->db_id;
1053
1054
1055 rec = (struct ctdb_rec_data *)&reply->data[0];
1056 for (i=0;i<reply->count;i++) {
1057 TDB_DATA key, data;
1058
1059 key.dptr = &rec->data[0];
1060 key.dsize = rec->keylen;
1061 data.dptr = &rec->data[key.dsize];
1062 data.dsize = rec->datalen;
1063
1064 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1065 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
1066 return -1;
1067 }
1068
1069 /* If we cant delete the record we must add it to the reply
1070 so the lmaster knows it may not purge this record
1071 */
1072 if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
1073 size_t old_size;
1074 struct ctdb_ltdb_header *hdr;
1075
1076 hdr = (struct ctdb_ltdb_header *)data.dptr;
1077 data.dptr += sizeof(*hdr);
1078 data.dsize -= sizeof(*hdr);
1079
1080 DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
1081
1082 old_size = talloc_get_size(records);
1083 records = talloc_realloc_size(outdata, records, old_size + rec->length);
1084 if (records == NULL) {
1085 DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
1086 return -1;
1087 }
1088 records->count++;
1089 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1090 }
1091
1092 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1093 }
1094
1095
1096 *outdata = ctdb_marshall_finish(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 *outdata = ctdb_marshall_finish(records);
1294
1295 return 0;
1296 }
1297
1298
1299 /*
1300 report capabilities
1301 */
1302 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1303 {
1304 uint32_t *capabilities = NULL;
1305
1306 capabilities = talloc(outdata, uint32_t);
1307 CTDB_NO_MEMORY(ctdb, capabilities);
1308 *capabilities = ctdb->capabilities;
1309
1310 outdata->dsize = sizeof(uint32_t);
1311 outdata->dptr = (uint8_t *)capabilities;
1312
1313 return 0;
1314 }
1315
1316 /* The recovery daemon will ping us at regular intervals.
1317 If we havent been pinged for a while we assume the recovery
1318 daemon is inoperable and we restart.
1319 */
1320 static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1321 {
1322 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1323 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1324
1325 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1326
1327 if (*count < ctdb->tunable.recd_ping_failcount) {
1328 (*count)++;
1329 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1330 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1331 ctdb_recd_ping_timeout, ctdb);
1332 return;
1333 }
1334
1335 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Restarting recovery daemon. (This can be caused if the cluster filesystem has hung)\n"));
1336
1337 ctdb_stop_recoverd(ctdb);
1338 ctdb_start_recoverd(ctdb);
1339 }
1340
1341 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1342 {
1343 talloc_free(ctdb->recd_ping_count);
1344
1345 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1346 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1347
1348 if (ctdb->tunable.recd_ping_timeout != 0) {
1349 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1350 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1351 ctdb_recd_ping_timeout, ctdb);
1352 }
1353
1354 return 0;
1355 }
1356
1357
1358
1359 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1360 {
1361 uint32_t new_recmaster;
1362
1363 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1364 new_recmaster = ((uint32_t *)(&indata.dptr[0]))[0];
1365
1366 if (ctdb->pnn != new_recmaster && ctdb->recovery_master == ctdb->pnn) {
1367 DEBUG(DEBUG_NOTICE,
1368 ("This node (%u) is no longer the recovery master\n", ctdb->pnn));
1369 }
1370
1371 if (ctdb->pnn == new_recmaster && ctdb->recovery_master != new_recmaster) {
1372 DEBUG(DEBUG_NOTICE,
1373 ("This node (%u) is now the recovery master\n", ctdb->pnn));
1374 }
1375
1376 ctdb->recovery_master = new_recmaster;
1377 return 0;
1378 }
1379
1380
1381 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb)
1382 {
1383 DEBUG(DEBUG_NOTICE, ("Stopping node\n"));
1384 ctdb_disable_monitoring(ctdb);
1385 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1386
1387 return 0;
1388 }
1389
1390 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1391 {
1392 DEBUG(DEBUG_NOTICE, ("Continue node\n"));
1393 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1394
1395 return 0;
1396 }
1397
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