4 Copyright (C) Andrew Tridgell 2007
5 Copyright (C) Ronnie Sahlberg 2007
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.
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.
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/>.
21 #include "lib/tevent/tevent.h"
22 #include "lib/tdb/include/tdb.h"
23 #include "system/time.h"
24 #include "system/network.h"
25 #include "system/filesys.h"
26 #include "system/wait.h"
27 #include "../include/ctdb_private.h"
28 #include "lib/util/dlinklist.h"
32 lock all databases - mark only
34 static int ctdb_lock_all_databases_mark(struct ctdb_context *ctdb, uint32_t priority)
36 struct ctdb_db_context *ctdb_db;
38 if ((priority < 1) || (priority > NUM_DB_PRIORITIES)) {
39 DEBUG(DEBUG_ERR,(__location__ " Illegal priority when trying to mark all databases Prio:%u\n", priority));
43 if (ctdb->freeze_mode[priority] != CTDB_FREEZE_FROZEN) {
44 DEBUG(DEBUG_ERR,("Attempt to mark all databases locked when not frozen\n"));
47 /* The dual loop is a woraround for older versions of samba
48 that does not yet support the set-db-priority/lock order
49 call. So that we get basic deadlock avoiidance also for
50 these old versions of samba.
51 This code will be removed in the future.
53 for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
54 if (ctdb_db->priority != priority) {
57 if (strstr(ctdb_db->db_name, "notify") != NULL) {
60 if (tdb_lockall_mark(ctdb_db->ltdb->tdb) != 0) {
64 for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
65 if (ctdb_db->priority != priority) {
68 if (strstr(ctdb_db->db_name, "notify") == NULL) {
71 if (tdb_lockall_mark(ctdb_db->ltdb->tdb) != 0) {
79 lock all databases - unmark only
81 static int ctdb_lock_all_databases_unmark(struct ctdb_context *ctdb, uint32_t priority)
83 struct ctdb_db_context *ctdb_db;
85 if ((priority < 1) || (priority > NUM_DB_PRIORITIES)) {
86 DEBUG(DEBUG_ERR,(__location__ " Illegal priority when trying to mark all databases Prio:%u\n", priority));
90 if (ctdb->freeze_mode[priority] != CTDB_FREEZE_FROZEN) {
91 DEBUG(DEBUG_ERR,("Attempt to unmark all databases locked when not frozen\n"));
94 for (ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next) {
95 if (ctdb_db->priority != priority) {
98 if (tdb_lockall_unmark(ctdb_db->ltdb->tdb) != 0) {
107 ctdb_control_getvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
109 CHECK_CONTROL_DATA_SIZE(0);
110 struct ctdb_vnn_map_wire *map;
113 len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*ctdb->vnn_map->size;
114 map = talloc_size(outdata, len);
115 CTDB_NO_MEMORY(ctdb, map);
117 map->generation = ctdb->vnn_map->generation;
118 map->size = ctdb->vnn_map->size;
119 memcpy(map->map, ctdb->vnn_map->map, sizeof(uint32_t)*map->size);
121 outdata->dsize = len;
122 outdata->dptr = (uint8_t *)map;
128 ctdb_control_setvnnmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
130 struct ctdb_vnn_map_wire *map = (struct ctdb_vnn_map_wire *)indata.dptr;
133 for(i=1; i<=NUM_DB_PRIORITIES; i++) {
134 if (ctdb->freeze_mode[i] != CTDB_FREEZE_FROZEN) {
135 DEBUG(DEBUG_ERR,("Attempt to set vnnmap when not frozen\n"));
140 talloc_free(ctdb->vnn_map);
142 ctdb->vnn_map = talloc(ctdb, struct ctdb_vnn_map);
143 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map);
145 ctdb->vnn_map->generation = map->generation;
146 ctdb->vnn_map->size = map->size;
147 ctdb->vnn_map->map = talloc_array(ctdb->vnn_map, uint32_t, map->size);
148 CTDB_NO_MEMORY(ctdb, ctdb->vnn_map->map);
150 memcpy(ctdb->vnn_map->map, map->map, sizeof(uint32_t)*map->size);
156 ctdb_control_getdbmap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
159 struct ctdb_db_context *ctdb_db;
160 struct ctdb_dbid_map *dbid_map;
162 CHECK_CONTROL_DATA_SIZE(0);
165 for(ctdb_db=ctdb->db_list;ctdb_db;ctdb_db=ctdb_db->next){
170 outdata->dsize = offsetof(struct ctdb_dbid_map, dbs) + sizeof(dbid_map->dbs[0])*len;
171 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
172 if (!outdata->dptr) {
173 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate dbmap array\n"));
177 dbid_map = (struct ctdb_dbid_map *)outdata->dptr;
179 for (i=0,ctdb_db=ctdb->db_list;ctdb_db;i++,ctdb_db=ctdb_db->next){
180 dbid_map->dbs[i].dbid = ctdb_db->db_id;
181 dbid_map->dbs[i].persistent = ctdb_db->persistent;
188 ctdb_control_getnodemap(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
190 uint32_t i, num_nodes;
191 struct ctdb_node_map *node_map;
193 CHECK_CONTROL_DATA_SIZE(0);
195 num_nodes = ctdb->num_nodes;
197 outdata->dsize = offsetof(struct ctdb_node_map, nodes) + num_nodes*sizeof(struct ctdb_node_and_flags);
198 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
199 if (!outdata->dptr) {
200 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
204 node_map = (struct ctdb_node_map *)outdata->dptr;
205 node_map->num = num_nodes;
206 for (i=0; i<num_nodes; i++) {
207 if (parse_ip(ctdb->nodes[i]->address.address,
208 NULL, /* TODO: pass in the correct interface here*/
210 &node_map->nodes[i].addr) == 0)
212 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
215 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
216 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
223 get an old style ipv4-only nodemap
226 ctdb_control_getnodemapv4(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata, TDB_DATA *outdata)
228 uint32_t i, num_nodes;
229 struct ctdb_node_mapv4 *node_map;
231 CHECK_CONTROL_DATA_SIZE(0);
233 num_nodes = ctdb->num_nodes;
235 outdata->dsize = offsetof(struct ctdb_node_mapv4, nodes) + num_nodes*sizeof(struct ctdb_node_and_flagsv4);
236 outdata->dptr = (unsigned char *)talloc_zero_size(outdata, outdata->dsize);
237 if (!outdata->dptr) {
238 DEBUG(DEBUG_ALERT, (__location__ " Failed to allocate nodemap array\n"));
242 node_map = (struct ctdb_node_mapv4 *)outdata->dptr;
243 node_map->num = num_nodes;
244 for (i=0; i<num_nodes; i++) {
245 if (parse_ipv4(ctdb->nodes[i]->address.address, 0, &node_map->nodes[i].sin) == 0) {
246 DEBUG(DEBUG_ERR, (__location__ " Failed to parse %s into a sockaddr\n", ctdb->nodes[i]->address.address));
250 node_map->nodes[i].pnn = ctdb->nodes[i]->pnn;
251 node_map->nodes[i].flags = ctdb->nodes[i]->flags;
258 ctdb_reload_nodes_event(struct event_context *ev, struct timed_event *te,
259 struct timeval t, void *private_data)
262 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
264 struct ctdb_node **nodes;
266 tmp_ctx = talloc_new(ctdb);
268 /* steal the old nodes file for a while */
269 talloc_steal(tmp_ctx, ctdb->nodes);
272 num_nodes = ctdb->num_nodes;
275 /* load the new nodes file */
276 ctdb_load_nodes_file(ctdb);
278 for (i=0; i<ctdb->num_nodes; i++) {
279 /* keep any identical pre-existing nodes and connections */
280 if ((i < num_nodes) && ctdb_same_address(&ctdb->nodes[i]->address, &nodes[i]->address)) {
281 talloc_free(ctdb->nodes[i]);
282 ctdb->nodes[i] = talloc_steal(ctdb->nodes, nodes[i]);
286 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
290 /* any new or different nodes must be added */
291 if (ctdb->methods->add_node(ctdb->nodes[i]) != 0) {
292 DEBUG(DEBUG_CRIT, (__location__ " methods->add_node failed at %d\n", i));
293 ctdb_fatal(ctdb, "failed to add node. shutting down\n");
295 if (ctdb->methods->connect_node(ctdb->nodes[i]) != 0) {
296 DEBUG(DEBUG_CRIT, (__location__ " methods->add_connect failed at %d\n", i));
297 ctdb_fatal(ctdb, "failed to connect to node. shutting down\n");
301 /* tell the recovery daemon to reaload the nodes file too */
302 ctdb_daemon_send_message(ctdb, ctdb->pnn, CTDB_SRVID_RELOAD_NODES, tdb_null);
304 talloc_free(tmp_ctx);
309 reload the nodes file after a short delay (so that we can send the response
313 ctdb_control_reload_nodes_file(struct ctdb_context *ctdb, uint32_t opcode)
315 event_add_timed(ctdb->ev, ctdb, timeval_current_ofs(1,0), ctdb_reload_nodes_event, ctdb);
321 a traverse function for pulling all relevent records from pulldb
324 struct ctdb_context *ctdb;
325 struct ctdb_marshall_buffer *pulldata;
330 static int traverse_pulldb(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
332 struct pulldb_data *params = (struct pulldb_data *)p;
333 struct ctdb_rec_data *rec;
335 /* add the record to the blob */
336 rec = ctdb_marshall_record(params->pulldata, 0, key, NULL, data);
338 params->failed = true;
341 params->pulldata = talloc_realloc_size(NULL, params->pulldata, rec->length + params->len);
342 if (params->pulldata == NULL) {
343 DEBUG(DEBUG_CRIT,(__location__ " Failed to expand pulldb_data to %u\n", rec->length + params->len));
344 ctdb_fatal(params->ctdb, "failed to allocate memory for recovery. shutting down\n");
346 params->pulldata->count++;
347 memcpy(params->len+(uint8_t *)params->pulldata, rec, rec->length);
348 params->len += rec->length;
355 pul a bunch of records from a ltdb, filtering by lmaster
357 int32_t ctdb_control_pull_db(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
359 struct ctdb_control_pulldb *pull;
360 struct ctdb_db_context *ctdb_db;
361 struct pulldb_data params;
362 struct ctdb_marshall_buffer *reply;
364 pull = (struct ctdb_control_pulldb *)indata.dptr;
366 ctdb_db = find_ctdb_db(ctdb, pull->db_id);
368 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", pull->db_id));
372 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
373 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_pull_db when not frozen\n"));
377 reply = talloc_zero(outdata, struct ctdb_marshall_buffer);
378 CTDB_NO_MEMORY(ctdb, reply);
380 reply->db_id = pull->db_id;
383 params.pulldata = reply;
384 params.len = offsetof(struct ctdb_marshall_buffer, data);
385 params.failed = false;
387 if (ctdb_db->unhealthy_reason) {
388 /* this is just a warning, as the tdb should be empty anyway */
389 DEBUG(DEBUG_WARNING,("db(%s) unhealty in ctdb_control_pull_db: %s\n",
390 ctdb_db->db_name, ctdb_db->unhealthy_reason));
393 if (ctdb_lock_all_databases_mark(ctdb, ctdb_db->priority) != 0) {
394 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
398 if (tdb_traverse_read(ctdb_db->ltdb->tdb, traverse_pulldb, ¶ms) == -1) {
399 DEBUG(DEBUG_ERR,(__location__ " Failed to get traverse db '%s'\n", ctdb_db->db_name));
400 ctdb_lock_all_databases_unmark(ctdb, ctdb_db->priority);
401 talloc_free(params.pulldata);
405 ctdb_lock_all_databases_unmark(ctdb, ctdb_db->priority);
407 outdata->dptr = (uint8_t *)params.pulldata;
408 outdata->dsize = params.len;
414 push a bunch of records into a ltdb, filtering by rsn
416 int32_t ctdb_control_push_db(struct ctdb_context *ctdb, TDB_DATA indata)
418 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
419 struct ctdb_db_context *ctdb_db;
421 struct ctdb_rec_data *rec;
423 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
424 DEBUG(DEBUG_ERR,(__location__ " invalid data in pulldb reply\n"));
428 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
430 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
434 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
435 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_push_db when not frozen\n"));
439 if (ctdb_lock_all_databases_mark(ctdb, ctdb_db->priority) != 0) {
440 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
444 rec = (struct ctdb_rec_data *)&reply->data[0];
446 DEBUG(DEBUG_INFO,("starting push of %u records for dbid 0x%x\n",
447 reply->count, reply->db_id));
449 for (i=0;i<reply->count;i++) {
451 struct ctdb_ltdb_header *hdr;
453 key.dptr = &rec->data[0];
454 key.dsize = rec->keylen;
455 data.dptr = &rec->data[key.dsize];
456 data.dsize = rec->datalen;
458 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
459 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record\n"));
462 hdr = (struct ctdb_ltdb_header *)data.dptr;
463 data.dptr += sizeof(*hdr);
464 data.dsize -= sizeof(*hdr);
466 ret = ctdb_ltdb_store(ctdb_db, key, hdr, data);
468 DEBUG(DEBUG_CRIT, (__location__ " Unable to store record\n"));
472 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
475 DEBUG(DEBUG_DEBUG,("finished push of %u records for dbid 0x%x\n",
476 reply->count, reply->db_id));
478 ctdb_lock_all_databases_unmark(ctdb, ctdb_db->priority);
482 ctdb_lock_all_databases_unmark(ctdb, ctdb_db->priority);
487 static int traverse_setdmaster(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *p)
489 uint32_t *dmaster = (uint32_t *)p;
490 struct ctdb_ltdb_header *header = (struct ctdb_ltdb_header *)data.dptr;
493 /* skip if already correct */
494 if (header->dmaster == *dmaster) {
498 header->dmaster = *dmaster;
500 ret = tdb_store(tdb, key, data, TDB_REPLACE);
502 DEBUG(DEBUG_CRIT,(__location__ " failed to write tdb data back ret:%d\n",ret));
506 /* TODO: add error checking here */
511 int32_t ctdb_control_set_dmaster(struct ctdb_context *ctdb, TDB_DATA indata)
513 struct ctdb_control_set_dmaster *p = (struct ctdb_control_set_dmaster *)indata.dptr;
514 struct ctdb_db_context *ctdb_db;
516 ctdb_db = find_ctdb_db(ctdb, p->db_id);
518 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", p->db_id));
522 if (ctdb->freeze_mode[ctdb_db->priority] != CTDB_FREEZE_FROZEN) {
523 DEBUG(DEBUG_DEBUG,("rejecting ctdb_control_set_dmaster when not frozen\n"));
527 if (ctdb_lock_all_databases_mark(ctdb, ctdb_db->priority) != 0) {
528 DEBUG(DEBUG_ERR,(__location__ " Failed to get lock on entired db - failing\n"));
532 tdb_traverse(ctdb_db->ltdb->tdb, traverse_setdmaster, &p->dmaster);
534 ctdb_lock_all_databases_unmark(ctdb, ctdb_db->priority);
539 struct ctdb_set_recmode_state {
540 struct ctdb_context *ctdb;
541 struct ctdb_req_control *c;
544 struct timed_event *te;
545 struct fd_event *fde;
547 struct timeval start_time;
551 called if our set_recmode child times out. this would happen if
552 ctdb_recovery_lock() would block.
554 static void ctdb_set_recmode_timeout(struct event_context *ev, struct timed_event *te,
555 struct timeval t, void *private_data)
557 struct ctdb_set_recmode_state *state = talloc_get_type(private_data,
558 struct ctdb_set_recmode_state);
560 /* we consider this a success, not a failure, as we failed to
561 set the recovery lock which is what we wanted. This can be
562 caused by the cluster filesystem being very slow to
563 arbitrate locks immediately after a node failure.
565 DEBUG(DEBUG_ERR,(__location__ " set_recmode child process hung/timedout CFS slow to grant locks? (allowing recmode set anyway)\n"));
566 state->ctdb->recovery_mode = state->recmode;
567 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
572 /* when we free the recmode state we must kill any child process.
574 static int set_recmode_destructor(struct ctdb_set_recmode_state *state)
576 double l = timeval_elapsed(&state->start_time);
578 CTDB_UPDATE_RECLOCK_LATENCY(state->ctdb, "daemon reclock", reclock.ctdbd, l);
580 if (state->fd[0] != -1) {
583 if (state->fd[1] != -1) {
586 kill(state->child, SIGKILL);
590 /* this is called when the client process has completed ctdb_recovery_lock()
591 and has written data back to us through the pipe.
593 static void set_recmode_handler(struct event_context *ev, struct fd_event *fde,
594 uint16_t flags, void *private_data)
596 struct ctdb_set_recmode_state *state= talloc_get_type(private_data,
597 struct ctdb_set_recmode_state);
601 /* we got a response from our child process so we can abort the
604 talloc_free(state->te);
608 /* read the childs status when trying to lock the reclock file.
609 child wrote 0 if everything is fine and 1 if it did manage
610 to lock the file, which would be a problem since that means
611 we got a request to exit from recovery but we could still lock
612 the file which at this time SHOULD be locked by the recovery
613 daemon on the recmaster
615 ret = read(state->fd[0], &c, 1);
616 if (ret != 1 || c != 0) {
617 ctdb_request_control_reply(state->ctdb, state->c, NULL, -1, "managed to lock reclock file from inside daemon");
622 state->ctdb->recovery_mode = state->recmode;
624 ctdb_request_control_reply(state->ctdb, state->c, NULL, 0, NULL);
630 ctdb_drop_all_ips_event(struct event_context *ev, struct timed_event *te,
631 struct timeval t, void *private_data)
633 struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
635 DEBUG(DEBUG_ERR,(__location__ " Been in recovery mode for too long. Dropping all IPS\n"));
636 talloc_free(ctdb->release_ips_ctx);
637 ctdb->release_ips_ctx = NULL;
639 ctdb_release_all_ips(ctdb);
643 set the recovery mode
645 int32_t ctdb_control_set_recmode(struct ctdb_context *ctdb,
646 struct ctdb_req_control *c,
647 TDB_DATA indata, bool *async_reply,
648 const char **errormsg)
650 uint32_t recmode = *(uint32_t *)indata.dptr;
652 struct ctdb_set_recmode_state *state;
653 pid_t parent = getpid();
655 /* if we enter recovery but stay in recovery for too long
656 we will eventually drop all our ip addresses
658 if (recmode == CTDB_RECOVERY_NORMAL) {
659 talloc_free(ctdb->release_ips_ctx);
660 ctdb->release_ips_ctx = NULL;
662 talloc_free(ctdb->release_ips_ctx);
663 ctdb->release_ips_ctx = talloc_new(ctdb);
664 CTDB_NO_MEMORY(ctdb, ctdb->release_ips_ctx);
666 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);
669 if (recmode != ctdb->recovery_mode) {
670 DEBUG(DEBUG_NOTICE,(__location__ " Recovery mode set to %s\n",
671 recmode==CTDB_RECOVERY_NORMAL?"NORMAL":"ACTIVE"));
674 if (recmode != CTDB_RECOVERY_NORMAL ||
675 ctdb->recovery_mode != CTDB_RECOVERY_ACTIVE) {
676 ctdb->recovery_mode = recmode;
680 /* some special handling when ending recovery mode */
682 /* force the databases to thaw */
683 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
684 if (ctdb->freeze_handles[i] != NULL) {
685 ctdb_control_thaw(ctdb, i);
689 state = talloc(ctdb, struct ctdb_set_recmode_state);
690 CTDB_NO_MEMORY(ctdb, state);
692 state->start_time = timeval_current();
696 if (ctdb->tunable.verify_recovery_lock == 0) {
697 /* dont need to verify the reclock file */
698 ctdb->recovery_mode = recmode;
702 /* For the rest of what needs to be done, we need to do this in
703 a child process since
704 1, the call to ctdb_recovery_lock() can block if the cluster
705 filesystem is in the process of recovery.
707 ret = pipe(state->fd);
710 DEBUG(DEBUG_CRIT,(__location__ " Failed to open pipe for set_recmode child\n"));
714 state->child = fork();
715 if (state->child == (pid_t)-1) {
722 if (state->child == 0) {
726 debug_extra = talloc_asprintf(NULL, "set_recmode:");
727 /* we should not be able to get the lock on the reclock file,
728 as it should be held by the recovery master
730 if (ctdb_recovery_lock(ctdb, false)) {
731 DEBUG(DEBUG_CRIT,("ERROR: recovery lock file %s not locked when recovering!\n", ctdb->recovery_lock_file));
735 write(state->fd[1], &cc, 1);
736 /* make sure we die when our parent dies */
737 while (kill(parent, 0) == 0 || errno != ESRCH) {
739 write(state->fd[1], &cc, 1);
744 set_close_on_exec(state->fd[0]);
748 talloc_set_destructor(state, set_recmode_destructor);
750 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for setrecmode\n", state->fd[0]));
752 state->te = event_add_timed(ctdb->ev, state, timeval_current_ofs(5, 0),
753 ctdb_set_recmode_timeout, state);
755 state->fde = event_add_fd(ctdb->ev, state, state->fd[0],
760 if (state->fde == NULL) {
764 tevent_fd_set_auto_close(state->fde);
767 state->recmode = recmode;
768 state->c = talloc_steal(state, c);
777 try and get the recovery lock in shared storage - should only work
778 on the recovery master recovery daemon. Anywhere else is a bug
780 bool ctdb_recovery_lock(struct ctdb_context *ctdb, bool keep)
785 DEBUG(DEBUG_ERR, ("Take the recovery lock\n"));
787 if (ctdb->recovery_lock_fd != -1) {
788 close(ctdb->recovery_lock_fd);
789 ctdb->recovery_lock_fd = -1;
792 ctdb->recovery_lock_fd = open(ctdb->recovery_lock_file, O_RDWR|O_CREAT, 0600);
793 if (ctdb->recovery_lock_fd == -1) {
794 DEBUG(DEBUG_ERR,("ctdb_recovery_lock: Unable to open %s - (%s)\n",
795 ctdb->recovery_lock_file, strerror(errno)));
799 set_close_on_exec(ctdb->recovery_lock_fd);
801 lock.l_type = F_WRLCK;
802 lock.l_whence = SEEK_SET;
807 if (fcntl(ctdb->recovery_lock_fd, F_SETLK, &lock) != 0) {
808 close(ctdb->recovery_lock_fd);
809 ctdb->recovery_lock_fd = -1;
811 DEBUG(DEBUG_CRIT,("ctdb_recovery_lock: Failed to get recovery lock on '%s'\n", ctdb->recovery_lock_file));
817 close(ctdb->recovery_lock_fd);
818 ctdb->recovery_lock_fd = -1;
822 DEBUG(DEBUG_NOTICE, ("Recovery lock taken successfully\n"));
825 DEBUG(DEBUG_NOTICE,("ctdb_recovery_lock: Got recovery lock on '%s'\n", ctdb->recovery_lock_file));
831 delete a record as part of the vacuum process
832 only delete if we are not lmaster or dmaster, and our rsn is <= the provided rsn
833 use non-blocking locks
835 return 0 if the record was successfully deleted (i.e. it does not exist
836 when the function returns)
837 or !0 is the record still exists in the tdb after returning.
839 static int delete_tdb_record(struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db, struct ctdb_rec_data *rec)
842 struct ctdb_ltdb_header *hdr, *hdr2;
844 /* these are really internal tdb functions - but we need them here for
845 non-blocking lock of the freelist */
846 int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype);
847 int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
850 key.dsize = rec->keylen;
851 key.dptr = &rec->data[0];
852 data.dsize = rec->datalen;
853 data.dptr = &rec->data[rec->keylen];
855 if (ctdb_lmaster(ctdb, &key) == ctdb->pnn) {
856 DEBUG(DEBUG_INFO,(__location__ " Called delete on record where we are lmaster\n"));
860 if (data.dsize != sizeof(struct ctdb_ltdb_header)) {
861 DEBUG(DEBUG_ERR,(__location__ " Bad record size\n"));
865 hdr = (struct ctdb_ltdb_header *)data.dptr;
867 /* use a non-blocking lock */
868 if (tdb_chainlock_nonblock(ctdb_db->ltdb->tdb, key) != 0) {
872 data = tdb_fetch(ctdb_db->ltdb->tdb, key);
873 if (data.dptr == NULL) {
874 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
878 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
879 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) == 0) {
880 tdb_delete(ctdb_db->ltdb->tdb, key);
881 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
882 DEBUG(DEBUG_CRIT,(__location__ " Deleted corrupt record\n"));
884 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
889 hdr2 = (struct ctdb_ltdb_header *)data.dptr;
891 if (hdr2->rsn > hdr->rsn) {
892 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
893 DEBUG(DEBUG_INFO,(__location__ " Skipping record with rsn=%llu - called with rsn=%llu\n",
894 (unsigned long long)hdr2->rsn, (unsigned long long)hdr->rsn));
899 if (hdr2->dmaster == ctdb->pnn) {
900 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
901 DEBUG(DEBUG_INFO,(__location__ " Attempted delete record where we are the dmaster\n"));
906 if (tdb_lock_nonblock(ctdb_db->ltdb->tdb, -1, F_WRLCK) != 0) {
907 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
912 if (tdb_delete(ctdb_db->ltdb->tdb, key) != 0) {
913 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
914 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
915 DEBUG(DEBUG_INFO,(__location__ " Failed to delete record\n"));
920 tdb_unlock(ctdb_db->ltdb->tdb, -1, F_WRLCK);
921 tdb_chainunlock(ctdb_db->ltdb->tdb, key);
928 struct recovery_callback_state {
929 struct ctdb_req_control *c;
934 called when the 'recovered' event script has finished
936 static void ctdb_end_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
938 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
940 ctdb_enable_monitoring(ctdb);
941 CTDB_INCREMENT_STAT(ctdb, num_recoveries);
944 DEBUG(DEBUG_ERR,(__location__ " recovered event script failed (status %d)\n", status));
945 if (status == -ETIME) {
950 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
953 gettimeofday(&ctdb->last_recovery_finished, NULL);
957 recovery has finished
959 int32_t ctdb_control_end_recovery(struct ctdb_context *ctdb,
960 struct ctdb_req_control *c,
964 struct recovery_callback_state *state;
966 DEBUG(DEBUG_NOTICE,("Recovery has finished\n"));
968 state = talloc(ctdb, struct recovery_callback_state);
969 CTDB_NO_MEMORY(ctdb, state);
973 ctdb_disable_monitoring(ctdb);
975 ret = ctdb_event_script_callback(ctdb, state,
976 ctdb_end_recovery_callback,
979 CTDB_EVENT_RECOVERED, "%s", "");
982 ctdb_enable_monitoring(ctdb);
984 DEBUG(DEBUG_ERR,(__location__ " Failed to end recovery\n"));
989 /* tell the control that we will be reply asynchronously */
990 state->c = talloc_steal(state, c);
996 called when the 'startrecovery' event script has finished
998 static void ctdb_start_recovery_callback(struct ctdb_context *ctdb, int status, void *p)
1000 struct recovery_callback_state *state = talloc_get_type(p, struct recovery_callback_state);
1003 DEBUG(DEBUG_ERR,(__location__ " startrecovery event script failed (status %d)\n", status));
1006 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
1011 run the startrecovery eventscript
1013 int32_t ctdb_control_start_recovery(struct ctdb_context *ctdb,
1014 struct ctdb_req_control *c,
1018 struct recovery_callback_state *state;
1020 DEBUG(DEBUG_NOTICE,(__location__ " startrecovery eventscript has been invoked\n"));
1021 gettimeofday(&ctdb->last_recovery_started, NULL);
1023 state = talloc(ctdb, struct recovery_callback_state);
1024 CTDB_NO_MEMORY(ctdb, state);
1026 state->c = talloc_steal(state, c);
1028 ctdb_disable_monitoring(ctdb);
1030 ret = ctdb_event_script_callback(ctdb, state,
1031 ctdb_start_recovery_callback,
1033 CTDB_EVENT_START_RECOVERY,
1037 DEBUG(DEBUG_ERR,(__location__ " Failed to start recovery\n"));
1042 /* tell the control that we will be reply asynchronously */
1043 *async_reply = true;
1048 try to delete all these records as part of the vacuuming process
1049 and return the records we failed to delete
1051 int32_t ctdb_control_try_delete_records(struct ctdb_context *ctdb, TDB_DATA indata, TDB_DATA *outdata)
1053 struct ctdb_marshall_buffer *reply = (struct ctdb_marshall_buffer *)indata.dptr;
1054 struct ctdb_db_context *ctdb_db;
1056 struct ctdb_rec_data *rec;
1057 struct ctdb_marshall_buffer *records;
1059 if (indata.dsize < offsetof(struct ctdb_marshall_buffer, data)) {
1060 DEBUG(DEBUG_ERR,(__location__ " invalid data in try_delete_records\n"));
1064 ctdb_db = find_ctdb_db(ctdb, reply->db_id);
1066 DEBUG(DEBUG_ERR,(__location__ " Unknown db 0x%08x\n", reply->db_id));
1071 DEBUG(DEBUG_DEBUG,("starting try_delete_records of %u records for dbid 0x%x\n",
1072 reply->count, reply->db_id));
1075 /* create a blob to send back the records we couldnt delete */
1076 records = (struct ctdb_marshall_buffer *)
1077 talloc_zero_size(outdata,
1078 offsetof(struct ctdb_marshall_buffer, data));
1079 if (records == NULL) {
1080 DEBUG(DEBUG_ERR,(__location__ " Out of memory\n"));
1083 records->db_id = ctdb_db->db_id;
1086 rec = (struct ctdb_rec_data *)&reply->data[0];
1087 for (i=0;i<reply->count;i++) {
1090 key.dptr = &rec->data[0];
1091 key.dsize = rec->keylen;
1092 data.dptr = &rec->data[key.dsize];
1093 data.dsize = rec->datalen;
1095 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1096 DEBUG(DEBUG_CRIT,(__location__ " bad ltdb record in indata\n"));
1100 /* If we cant delete the record we must add it to the reply
1101 so the lmaster knows it may not purge this record
1103 if (delete_tdb_record(ctdb, ctdb_db, rec) != 0) {
1105 struct ctdb_ltdb_header *hdr;
1107 hdr = (struct ctdb_ltdb_header *)data.dptr;
1108 data.dptr += sizeof(*hdr);
1109 data.dsize -= sizeof(*hdr);
1111 DEBUG(DEBUG_INFO, (__location__ " Failed to vacuum delete record with hash 0x%08x\n", ctdb_hash(&key)));
1113 old_size = talloc_get_size(records);
1114 records = talloc_realloc_size(outdata, records, old_size + rec->length);
1115 if (records == NULL) {
1116 DEBUG(DEBUG_ERR,(__location__ " Failed to expand\n"));
1120 memcpy(old_size+(uint8_t *)records, rec, rec->length);
1123 rec = (struct ctdb_rec_data *)(rec->length + (uint8_t *)rec);
1127 outdata->dptr = (uint8_t *)records;
1128 outdata->dsize = talloc_get_size(records);
1136 int32_t ctdb_control_get_capabilities(struct ctdb_context *ctdb, TDB_DATA *outdata)
1138 uint32_t *capabilities = NULL;
1140 capabilities = talloc(outdata, uint32_t);
1141 CTDB_NO_MEMORY(ctdb, capabilities);
1142 *capabilities = ctdb->capabilities;
1144 outdata->dsize = sizeof(uint32_t);
1145 outdata->dptr = (uint8_t *)capabilities;
1150 static void ctdb_recd_ping_timeout(struct event_context *ev, struct timed_event *te, struct timeval t, void *p)
1152 struct ctdb_context *ctdb = talloc_get_type(p, struct ctdb_context);
1153 uint32_t *count = talloc_get_type(ctdb->recd_ping_count, uint32_t);
1155 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Count : %u\n", *count));
1157 if (*count < ctdb->tunable.recd_ping_failcount) {
1159 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1160 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1161 ctdb_recd_ping_timeout, ctdb);
1165 DEBUG(DEBUG_ERR, ("Final timeout for recovery daemon ping. Shutting down ctdb daemon. (This can be caused if the cluster filesystem has hung)\n"));
1167 ctdb_stop_recoverd(ctdb);
1168 ctdb_stop_keepalive(ctdb);
1169 ctdb_stop_monitoring(ctdb);
1170 ctdb_release_all_ips(ctdb);
1171 if (ctdb->methods != NULL) {
1172 ctdb->methods->shutdown(ctdb);
1174 ctdb_event_script(ctdb, CTDB_EVENT_SHUTDOWN);
1175 DEBUG(DEBUG_ERR, ("Recovery daemon ping timeout. Daemon has been shut down.\n"));
1179 /* The recovery daemon will ping us at regular intervals.
1180 If we havent been pinged for a while we assume the recovery
1181 daemon is inoperable and we shut down.
1183 int32_t ctdb_control_recd_ping(struct ctdb_context *ctdb)
1185 talloc_free(ctdb->recd_ping_count);
1187 ctdb->recd_ping_count = talloc_zero(ctdb, uint32_t);
1188 CTDB_NO_MEMORY(ctdb, ctdb->recd_ping_count);
1190 if (ctdb->tunable.recd_ping_timeout != 0) {
1191 event_add_timed(ctdb->ev, ctdb->recd_ping_count,
1192 timeval_current_ofs(ctdb->tunable.recd_ping_timeout, 0),
1193 ctdb_recd_ping_timeout, ctdb);
1201 int32_t ctdb_control_set_recmaster(struct ctdb_context *ctdb, uint32_t opcode, TDB_DATA indata)
1203 CHECK_CONTROL_DATA_SIZE(sizeof(uint32_t));
1205 ctdb->recovery_master = ((uint32_t *)(&indata.dptr[0]))[0];
1210 struct stop_node_callback_state {
1211 struct ctdb_req_control *c;
1215 called when the 'stopped' event script has finished
1217 static void ctdb_stop_node_callback(struct ctdb_context *ctdb, int status, void *p)
1219 struct stop_node_callback_state *state = talloc_get_type(p, struct stop_node_callback_state);
1222 DEBUG(DEBUG_ERR,(__location__ " stopped event script failed (status %d)\n", status));
1223 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;
1224 if (status == -ETIME) {
1225 ctdb_ban_self(ctdb);
1229 ctdb_request_control_reply(ctdb, state->c, NULL, status, NULL);
1233 int32_t ctdb_control_stop_node(struct ctdb_context *ctdb, struct ctdb_req_control *c, bool *async_reply)
1236 struct stop_node_callback_state *state;
1238 DEBUG(DEBUG_INFO,(__location__ " Stopping node\n"));
1240 state = talloc(ctdb, struct stop_node_callback_state);
1241 CTDB_NO_MEMORY(ctdb, state);
1243 state->c = talloc_steal(state, c);
1245 ctdb_disable_monitoring(ctdb);
1247 ret = ctdb_event_script_callback(ctdb, state,
1248 ctdb_stop_node_callback,
1250 CTDB_EVENT_STOPPED, "%s", "");
1253 ctdb_enable_monitoring(ctdb);
1255 DEBUG(DEBUG_ERR,(__location__ " Failed to stop node\n"));
1260 ctdb->nodes[ctdb->pnn]->flags |= NODE_FLAGS_STOPPED;
1262 *async_reply = true;
1267 int32_t ctdb_control_continue_node(struct ctdb_context *ctdb)
1269 DEBUG(DEBUG_INFO,(__location__ " Continue node\n"));
1270 ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_STOPPED;