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/>.
23 #include "lib/tdb/include/tdb.h"
24 #include "lib/util/dlinklist.h"
25 #include "lib/events/events.h"
26 #include "system/network.h"
27 #include "system/filesys.h"
28 #include "system/locale.h"
30 #include "../include/ctdb_private.h"
31 #include "lib/util/dlinklist.h"
36 allocate a packet for use in client<->daemon communication
38 struct ctdb_req_header *_ctdbd_allocate_pkt(struct ctdb_context *ctdb,
40 enum ctdb_operation operation,
41 size_t length, size_t slength,
45 struct ctdb_req_header *hdr;
47 length = MAX(length, slength);
48 size = (length+(CTDB_DS_ALIGNMENT-1)) & ~(CTDB_DS_ALIGNMENT-1);
50 hdr = (struct ctdb_req_header *)talloc_size(mem_ctx, size);
52 DEBUG(DEBUG_ERR,("Unable to allocate packet for operation %u of length %u\n",
53 operation, (unsigned)length));
56 talloc_set_name_const(hdr, type);
57 memset(hdr, 0, slength);
59 hdr->operation = operation;
60 hdr->ctdb_magic = CTDB_MAGIC;
61 hdr->ctdb_version = CTDB_VERSION;
62 hdr->srcnode = ctdb->pnn;
64 hdr->generation = ctdb->vnn_map->generation;
71 local version of ctdb_call
73 int ctdb_call_local(struct ctdb_db_context *ctdb_db, struct ctdb_call *call,
74 struct ctdb_ltdb_header *header, TALLOC_CTX *mem_ctx,
75 TDB_DATA *data, uint32_t caller)
77 struct ctdb_call_info *c;
78 struct ctdb_registered_call *fn;
79 struct ctdb_context *ctdb = ctdb_db->ctdb;
81 c = talloc(ctdb, struct ctdb_call_info);
82 CTDB_NO_MEMORY(ctdb, c);
85 c->call_data = &call->call_data;
86 c->record_data.dptr = talloc_memdup(c, data->dptr, data->dsize);
87 c->record_data.dsize = data->dsize;
88 CTDB_NO_MEMORY(ctdb, c->record_data.dptr);
93 for (fn=ctdb_db->calls;fn;fn=fn->next) {
94 if (fn->id == call->call_id) break;
97 ctdb_set_error(ctdb, "Unknown call id %u\n", call->call_id);
102 if (fn->fn(c) != 0) {
103 ctdb_set_error(ctdb, "ctdb_call %u failed\n", call->call_id);
108 if (header->laccessor != caller) {
111 header->laccessor = caller;
114 /* we need to force the record to be written out if this was a remote access,
115 so that the lacount is updated */
116 if (c->new_data == NULL && header->laccessor != ctdb->pnn) {
117 c->new_data = &c->record_data;
121 /* XXX check that we always have the lock here? */
122 if (ctdb_ltdb_store(ctdb_db, call->key, header, *c->new_data) != 0) {
123 ctdb_set_error(ctdb, "ctdb_call tdb_store failed\n");
130 call->reply_data = *c->reply_data;
132 talloc_steal(call, call->reply_data.dptr);
133 talloc_set_name_const(call->reply_data.dptr, __location__);
135 call->reply_data.dptr = NULL;
136 call->reply_data.dsize = 0;
138 call->status = c->status;
147 queue a packet for sending from client to daemon
149 static int ctdb_client_queue_pkt(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
151 return ctdb_queue_send(ctdb->daemon.queue, (uint8_t *)hdr, hdr->length);
156 called when a CTDB_REPLY_CALL packet comes in in the client
158 This packet comes in response to a CTDB_REQ_CALL request packet. It
159 contains any reply data from the call
161 static void ctdb_client_reply_call(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
163 struct ctdb_reply_call *c = (struct ctdb_reply_call *)hdr;
164 struct ctdb_client_call_state *state;
166 state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_client_call_state);
168 DEBUG(DEBUG_ERR,(__location__ " reqid %u not found\n", hdr->reqid));
172 if (hdr->reqid != state->reqid) {
173 /* we found a record but it was the wrong one */
174 DEBUG(DEBUG_ERR, ("Dropped client call reply with reqid:%u\n",hdr->reqid));
178 state->call->reply_data.dptr = c->data;
179 state->call->reply_data.dsize = c->datalen;
180 state->call->status = c->status;
182 talloc_steal(state, c);
184 state->state = CTDB_CALL_DONE;
186 if (state->async.fn) {
187 state->async.fn(state);
191 static void ctdb_client_reply_control(struct ctdb_context *ctdb, struct ctdb_req_header *hdr);
194 this is called in the client, when data comes in from the daemon
196 static void ctdb_client_read_cb(uint8_t *data, size_t cnt, void *args)
198 struct ctdb_context *ctdb = talloc_get_type(args, struct ctdb_context);
199 struct ctdb_req_header *hdr = (struct ctdb_req_header *)data;
202 /* place the packet as a child of a tmp_ctx. We then use
203 talloc_free() below to free it. If any of the calls want
204 to keep it, then they will steal it somewhere else, and the
205 talloc_free() will be a no-op */
206 tmp_ctx = talloc_new(ctdb);
207 talloc_steal(tmp_ctx, hdr);
210 DEBUG(DEBUG_INFO,("Daemon has exited - shutting down client\n"));
214 if (cnt < sizeof(*hdr)) {
215 DEBUG(DEBUG_CRIT,("Bad packet length %u in client\n", (unsigned)cnt));
218 if (cnt != hdr->length) {
219 ctdb_set_error(ctdb, "Bad header length %u expected %u in client\n",
220 (unsigned)hdr->length, (unsigned)cnt);
224 if (hdr->ctdb_magic != CTDB_MAGIC) {
225 ctdb_set_error(ctdb, "Non CTDB packet rejected in client\n");
229 if (hdr->ctdb_version != CTDB_VERSION) {
230 ctdb_set_error(ctdb, "Bad CTDB version 0x%x rejected in client\n", hdr->ctdb_version);
234 switch (hdr->operation) {
235 case CTDB_REPLY_CALL:
236 ctdb_client_reply_call(ctdb, hdr);
239 case CTDB_REQ_MESSAGE:
240 ctdb_request_message(ctdb, hdr);
243 case CTDB_REPLY_CONTROL:
244 ctdb_client_reply_control(ctdb, hdr);
248 DEBUG(DEBUG_CRIT,("bogus operation code:%u\n",hdr->operation));
252 talloc_free(tmp_ctx);
256 connect to a unix domain socket
258 int ctdb_socket_connect(struct ctdb_context *ctdb)
260 struct sockaddr_un addr;
262 memset(&addr, 0, sizeof(addr));
263 addr.sun_family = AF_UNIX;
264 strncpy(addr.sun_path, ctdb->daemon.name, sizeof(addr.sun_path));
266 ctdb->daemon.sd = socket(AF_UNIX, SOCK_STREAM, 0);
267 if (ctdb->daemon.sd == -1) {
268 DEBUG(DEBUG_ERR,(__location__ " Failed to open client socket. Errno:%s(%d)\n", strerror(errno), errno));
272 set_nonblocking(ctdb->daemon.sd);
273 set_close_on_exec(ctdb->daemon.sd);
275 if (connect(ctdb->daemon.sd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
276 close(ctdb->daemon.sd);
277 ctdb->daemon.sd = -1;
278 DEBUG(DEBUG_ERR,(__location__ " Failed to connect client socket to daemon. Errno:%s(%d)\n", strerror(errno), errno));
282 ctdb->daemon.queue = ctdb_queue_setup(ctdb, ctdb, ctdb->daemon.sd,
284 ctdb_client_read_cb, ctdb);
289 struct ctdb_record_handle {
290 struct ctdb_db_context *ctdb_db;
293 struct ctdb_ltdb_header header;
298 make a recv call to the local ctdb daemon - called from client context
300 This is called when the program wants to wait for a ctdb_call to complete and get the
301 results. This call will block unless the call has already completed.
303 int ctdb_call_recv(struct ctdb_client_call_state *state, struct ctdb_call *call)
309 while (state->state < CTDB_CALL_DONE) {
310 event_loop_once(state->ctdb_db->ctdb->ev);
312 if (state->state != CTDB_CALL_DONE) {
313 DEBUG(DEBUG_ERR,(__location__ " ctdb_call_recv failed\n"));
318 if (state->call->reply_data.dsize) {
319 call->reply_data.dptr = talloc_memdup(state->ctdb_db,
320 state->call->reply_data.dptr,
321 state->call->reply_data.dsize);
322 call->reply_data.dsize = state->call->reply_data.dsize;
324 call->reply_data.dptr = NULL;
325 call->reply_data.dsize = 0;
327 call->status = state->call->status;
337 destroy a ctdb_call in client
339 static int ctdb_client_call_destructor(struct ctdb_client_call_state *state)
341 ctdb_reqid_remove(state->ctdb_db->ctdb, state->reqid);
346 construct an event driven local ctdb_call
348 this is used so that locally processed ctdb_call requests are processed
349 in an event driven manner
351 static struct ctdb_client_call_state *ctdb_client_call_local_send(struct ctdb_db_context *ctdb_db,
352 struct ctdb_call *call,
353 struct ctdb_ltdb_header *header,
356 struct ctdb_client_call_state *state;
357 struct ctdb_context *ctdb = ctdb_db->ctdb;
360 state = talloc_zero(ctdb_db, struct ctdb_client_call_state);
361 CTDB_NO_MEMORY_NULL(ctdb, state);
362 state->call = talloc_zero(state, struct ctdb_call);
363 CTDB_NO_MEMORY_NULL(ctdb, state->call);
365 talloc_steal(state, data->dptr);
367 state->state = CTDB_CALL_DONE;
368 *(state->call) = *call;
369 state->ctdb_db = ctdb_db;
371 ret = ctdb_call_local(ctdb_db, state->call, header, state, data, ctdb->pnn);
377 make a ctdb call to the local daemon - async send. Called from client context.
379 This constructs a ctdb_call request and queues it for processing.
380 This call never blocks.
382 struct ctdb_client_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db,
383 struct ctdb_call *call)
385 struct ctdb_client_call_state *state;
386 struct ctdb_context *ctdb = ctdb_db->ctdb;
387 struct ctdb_ltdb_header header;
391 struct ctdb_req_call *c;
393 /* if the domain socket is not yet open, open it */
394 if (ctdb->daemon.sd==-1) {
395 ctdb_socket_connect(ctdb);
398 ret = ctdb_ltdb_lock(ctdb_db, call->key);
400 DEBUG(DEBUG_ERR,(__location__ " Failed to get chainlock\n"));
404 ret = ctdb_ltdb_fetch(ctdb_db, call->key, &header, ctdb_db, &data);
406 if (ret == 0 && header.dmaster == ctdb->pnn) {
407 state = ctdb_client_call_local_send(ctdb_db, call, &header, &data);
408 talloc_free(data.dptr);
409 ctdb_ltdb_unlock(ctdb_db, call->key);
413 ctdb_ltdb_unlock(ctdb_db, call->key);
414 talloc_free(data.dptr);
416 state = talloc_zero(ctdb_db, struct ctdb_client_call_state);
418 DEBUG(DEBUG_ERR, (__location__ " failed to allocate state\n"));
421 state->call = talloc_zero(state, struct ctdb_call);
422 if (state->call == NULL) {
423 DEBUG(DEBUG_ERR, (__location__ " failed to allocate state->call\n"));
427 len = offsetof(struct ctdb_req_call, data) + call->key.dsize + call->call_data.dsize;
428 c = ctdbd_allocate_pkt(ctdb, state, CTDB_REQ_CALL, len, struct ctdb_req_call);
430 DEBUG(DEBUG_ERR, (__location__ " failed to allocate packet\n"));
434 state->reqid = ctdb_reqid_new(ctdb, state);
435 state->ctdb_db = ctdb_db;
436 talloc_set_destructor(state, ctdb_client_call_destructor);
438 c->hdr.reqid = state->reqid;
439 c->flags = call->flags;
440 c->db_id = ctdb_db->db_id;
441 c->callid = call->call_id;
443 c->keylen = call->key.dsize;
444 c->calldatalen = call->call_data.dsize;
445 memcpy(&c->data[0], call->key.dptr, call->key.dsize);
446 memcpy(&c->data[call->key.dsize],
447 call->call_data.dptr, call->call_data.dsize);
448 *(state->call) = *call;
449 state->call->call_data.dptr = &c->data[call->key.dsize];
450 state->call->key.dptr = &c->data[0];
452 state->state = CTDB_CALL_WAIT;
455 ctdb_client_queue_pkt(ctdb, &c->hdr);
462 full ctdb_call. Equivalent to a ctdb_call_send() followed by a ctdb_call_recv()
464 int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call)
466 struct ctdb_client_call_state *state;
468 state = ctdb_call_send(ctdb_db, call);
469 return ctdb_call_recv(state, call);
474 tell the daemon what messaging srvid we will use, and register the message
475 handler function in the client
477 int ctdb_set_message_handler(struct ctdb_context *ctdb, uint64_t srvid,
478 ctdb_message_fn_t handler,
485 res = ctdb_control(ctdb, CTDB_CURRENT_NODE, srvid, CTDB_CONTROL_REGISTER_SRVID, 0,
486 tdb_null, NULL, NULL, &status, NULL, NULL);
487 if (res != 0 || status != 0) {
488 DEBUG(DEBUG_ERR,("Failed to register srvid %llu\n", (unsigned long long)srvid));
492 /* also need to register the handler with our own ctdb structure */
493 return ctdb_register_message_handler(ctdb, ctdb, srvid, handler, private_data);
497 tell the daemon we no longer want a srvid
499 int ctdb_remove_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data)
504 res = ctdb_control(ctdb, CTDB_CURRENT_NODE, srvid, CTDB_CONTROL_DEREGISTER_SRVID, 0,
505 tdb_null, NULL, NULL, &status, NULL, NULL);
506 if (res != 0 || status != 0) {
507 DEBUG(DEBUG_ERR,("Failed to deregister srvid %llu\n", (unsigned long long)srvid));
511 /* also need to register the handler with our own ctdb structure */
512 ctdb_deregister_message_handler(ctdb, srvid, private_data);
518 send a message - from client context
520 int ctdb_send_message(struct ctdb_context *ctdb, uint32_t pnn,
521 uint64_t srvid, TDB_DATA data)
523 struct ctdb_req_message *r;
526 len = offsetof(struct ctdb_req_message, data) + data.dsize;
527 r = ctdbd_allocate_pkt(ctdb, ctdb, CTDB_REQ_MESSAGE,
528 len, struct ctdb_req_message);
529 CTDB_NO_MEMORY(ctdb, r);
531 r->hdr.destnode = pnn;
533 r->datalen = data.dsize;
534 memcpy(&r->data[0], data.dptr, data.dsize);
536 res = ctdb_client_queue_pkt(ctdb, &r->hdr);
547 cancel a ctdb_fetch_lock operation, releasing the lock
549 static int fetch_lock_destructor(struct ctdb_record_handle *h)
551 ctdb_ltdb_unlock(h->ctdb_db, h->key);
556 force the migration of a record to this node
558 static int ctdb_client_force_migration(struct ctdb_db_context *ctdb_db, TDB_DATA key)
560 struct ctdb_call call;
562 call.call_id = CTDB_NULL_FUNC;
564 call.flags = CTDB_IMMEDIATE_MIGRATION;
565 return ctdb_call(ctdb_db, &call);
569 get a lock on a record, and return the records data. Blocks until it gets the lock
571 struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx,
572 TDB_DATA key, TDB_DATA *data)
575 struct ctdb_record_handle *h;
578 procedure is as follows:
580 1) get the chain lock.
581 2) check if we are dmaster
582 3) if we are the dmaster then return handle
583 4) if not dmaster then ask ctdb daemon to make us dmaster, and wait for
585 5) when we get the reply, goto (1)
588 h = talloc_zero(mem_ctx, struct ctdb_record_handle);
593 h->ctdb_db = ctdb_db;
595 h->key.dptr = talloc_memdup(h, key.dptr, key.dsize);
596 if (h->key.dptr == NULL) {
602 DEBUG(DEBUG_DEBUG,("ctdb_fetch_lock: key=%*.*s\n", (int)key.dsize, (int)key.dsize,
603 (const char *)key.dptr));
606 /* step 1 - get the chain lock */
607 ret = ctdb_ltdb_lock(ctdb_db, key);
609 DEBUG(DEBUG_ERR, (__location__ " failed to lock ltdb record\n"));
614 DEBUG(DEBUG_DEBUG,("ctdb_fetch_lock: got chain lock\n"));
616 talloc_set_destructor(h, fetch_lock_destructor);
618 ret = ctdb_ltdb_fetch(ctdb_db, key, &h->header, h, data);
620 /* when torturing, ensure we test the remote path */
621 if ((ctdb_db->ctdb->flags & CTDB_FLAG_TORTURE) &&
623 h->header.dmaster = (uint32_t)-1;
627 DEBUG(DEBUG_DEBUG,("ctdb_fetch_lock: done local fetch\n"));
629 if (ret != 0 || h->header.dmaster != ctdb_db->ctdb->pnn) {
630 ctdb_ltdb_unlock(ctdb_db, key);
631 ret = ctdb_client_force_migration(ctdb_db, key);
633 DEBUG(DEBUG_DEBUG,("ctdb_fetch_lock: force_migration failed\n"));
640 DEBUG(DEBUG_DEBUG,("ctdb_fetch_lock: we are dmaster - done\n"));
645 store some data to the record that was locked with ctdb_fetch_lock()
647 int ctdb_record_store(struct ctdb_record_handle *h, TDB_DATA data)
649 if (h->ctdb_db->persistent) {
650 DEBUG(DEBUG_ERR, (__location__ " ctdb_record_store prohibited for persistent dbs\n"));
654 return ctdb_ltdb_store(h->ctdb_db, h->key, &h->header, data);
658 non-locking fetch of a record
660 int ctdb_fetch(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx,
661 TDB_DATA key, TDB_DATA *data)
663 struct ctdb_call call;
666 call.call_id = CTDB_FETCH_FUNC;
667 call.call_data.dptr = NULL;
668 call.call_data.dsize = 0;
670 ret = ctdb_call(ctdb_db, &call);
673 *data = call.reply_data;
674 talloc_steal(mem_ctx, data->dptr);
683 called when a control completes or timesout to invoke the callback
684 function the user provided
686 static void invoke_control_callback(struct event_context *ev, struct timed_event *te,
687 struct timeval t, void *private_data)
689 struct ctdb_client_control_state *state;
690 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
693 state = talloc_get_type(private_data, struct ctdb_client_control_state);
694 talloc_steal(tmp_ctx, state);
696 ret = ctdb_control_recv(state->ctdb, state, state,
701 talloc_free(tmp_ctx);
705 called when a CTDB_REPLY_CONTROL packet comes in in the client
707 This packet comes in response to a CTDB_REQ_CONTROL request packet. It
708 contains any reply data from the control
710 static void ctdb_client_reply_control(struct ctdb_context *ctdb,
711 struct ctdb_req_header *hdr)
713 struct ctdb_reply_control *c = (struct ctdb_reply_control *)hdr;
714 struct ctdb_client_control_state *state;
716 state = ctdb_reqid_find(ctdb, hdr->reqid, struct ctdb_client_control_state);
718 DEBUG(DEBUG_ERR,(__location__ " reqid %u not found\n", hdr->reqid));
722 if (hdr->reqid != state->reqid) {
723 /* we found a record but it was the wrong one */
724 DEBUG(DEBUG_ERR, ("Dropped orphaned reply control with reqid:%u\n",hdr->reqid));
728 state->outdata.dptr = c->data;
729 state->outdata.dsize = c->datalen;
730 state->status = c->status;
732 state->errormsg = talloc_strndup(state,
733 (char *)&c->data[c->datalen],
737 /* state->outdata now uses resources from c so we dont want c
738 to just dissappear from under us while state is still alive
740 talloc_steal(state, c);
742 state->state = CTDB_CONTROL_DONE;
744 /* if we had a callback registered for this control, pull the response
745 and call the callback.
747 if (state->async.fn) {
748 event_add_timed(ctdb->ev, state, timeval_zero(), invoke_control_callback, state);
754 destroy a ctdb_control in client
756 static int ctdb_control_destructor(struct ctdb_client_control_state *state)
758 ctdb_reqid_remove(state->ctdb, state->reqid);
763 /* time out handler for ctdb_control */
764 static void control_timeout_func(struct event_context *ev, struct timed_event *te,
765 struct timeval t, void *private_data)
767 struct ctdb_client_control_state *state = talloc_get_type(private_data, struct ctdb_client_control_state);
769 DEBUG(DEBUG_ERR,(__location__ " control timed out. reqid:%u opcode:%u "
770 "dstnode:%u\n", state->reqid, state->c->opcode,
771 state->c->hdr.destnode));
773 state->state = CTDB_CONTROL_TIMEOUT;
775 /* if we had a callback registered for this control, pull the response
776 and call the callback.
778 if (state->async.fn) {
779 event_add_timed(state->ctdb->ev, state, timeval_zero(), invoke_control_callback, state);
783 /* async version of send control request */
784 struct ctdb_client_control_state *ctdb_control_send(struct ctdb_context *ctdb,
785 uint32_t destnode, uint64_t srvid,
786 uint32_t opcode, uint32_t flags, TDB_DATA data,
788 struct timeval *timeout,
791 struct ctdb_client_control_state *state;
793 struct ctdb_req_control *c;
800 /* if the domain socket is not yet open, open it */
801 if (ctdb->daemon.sd==-1) {
802 ctdb_socket_connect(ctdb);
805 state = talloc_zero(mem_ctx, struct ctdb_client_control_state);
806 CTDB_NO_MEMORY_NULL(ctdb, state);
809 state->reqid = ctdb_reqid_new(ctdb, state);
810 state->state = CTDB_CONTROL_WAIT;
811 state->errormsg = NULL;
813 talloc_set_destructor(state, ctdb_control_destructor);
815 len = offsetof(struct ctdb_req_control, data) + data.dsize;
816 c = ctdbd_allocate_pkt(ctdb, state, CTDB_REQ_CONTROL,
817 len, struct ctdb_req_control);
819 CTDB_NO_MEMORY_NULL(ctdb, c);
820 c->hdr.reqid = state->reqid;
821 c->hdr.destnode = destnode;
826 c->datalen = data.dsize;
828 memcpy(&c->data[0], data.dptr, data.dsize);
832 if (timeout && !timeval_is_zero(timeout)) {
833 event_add_timed(ctdb->ev, state, *timeout, control_timeout_func, state);
836 ret = ctdb_client_queue_pkt(ctdb, &(c->hdr));
842 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
851 /* async version of receive control reply */
852 int ctdb_control_recv(struct ctdb_context *ctdb,
853 struct ctdb_client_control_state *state,
855 TDB_DATA *outdata, int32_t *status, char **errormsg)
859 if (status != NULL) {
862 if (errormsg != NULL) {
870 /* prevent double free of state */
871 tmp_ctx = talloc_new(ctdb);
872 talloc_steal(tmp_ctx, state);
874 /* loop one event at a time until we either timeout or the control
877 while (state->state == CTDB_CONTROL_WAIT) {
878 event_loop_once(ctdb->ev);
881 if (state->state != CTDB_CONTROL_DONE) {
882 DEBUG(DEBUG_ERR,(__location__ " ctdb_control_recv failed\n"));
883 if (state->async.fn) {
884 state->async.fn(state);
886 talloc_free(tmp_ctx);
890 if (state->errormsg) {
891 DEBUG(DEBUG_ERR,("ctdb_control error: '%s'\n", state->errormsg));
893 (*errormsg) = talloc_move(mem_ctx, &state->errormsg);
895 if (state->async.fn) {
896 state->async.fn(state);
898 talloc_free(tmp_ctx);
903 *outdata = state->outdata;
904 outdata->dptr = talloc_memdup(mem_ctx, outdata->dptr, outdata->dsize);
908 *status = state->status;
911 if (state->async.fn) {
912 state->async.fn(state);
915 talloc_free(tmp_ctx);
922 send a ctdb control message
923 timeout specifies how long we should wait for a reply.
924 if timeout is NULL we wait indefinitely
926 int ctdb_control(struct ctdb_context *ctdb, uint32_t destnode, uint64_t srvid,
927 uint32_t opcode, uint32_t flags, TDB_DATA data,
928 TALLOC_CTX *mem_ctx, TDB_DATA *outdata, int32_t *status,
929 struct timeval *timeout,
932 struct ctdb_client_control_state *state;
934 state = ctdb_control_send(ctdb, destnode, srvid, opcode,
935 flags, data, mem_ctx,
937 return ctdb_control_recv(ctdb, state, mem_ctx, outdata, status,
945 a process exists call. Returns 0 if process exists, -1 otherwise
947 int ctdb_ctrl_process_exists(struct ctdb_context *ctdb, uint32_t destnode, pid_t pid)
953 data.dptr = (uint8_t*)&pid;
954 data.dsize = sizeof(pid);
956 ret = ctdb_control(ctdb, destnode, 0,
957 CTDB_CONTROL_PROCESS_EXISTS, 0, data,
958 NULL, NULL, &status, NULL, NULL);
960 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for process_exists failed\n"));
968 get remote statistics
970 int ctdb_ctrl_statistics(struct ctdb_context *ctdb, uint32_t destnode, struct ctdb_statistics *status)
976 ret = ctdb_control(ctdb, destnode, 0,
977 CTDB_CONTROL_STATISTICS, 0, tdb_null,
978 ctdb, &data, &res, NULL, NULL);
979 if (ret != 0 || res != 0) {
980 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for statistics failed\n"));
984 if (data.dsize != sizeof(struct ctdb_statistics)) {
985 DEBUG(DEBUG_ERR,(__location__ " Wrong statistics size %u - expected %u\n",
986 (unsigned)data.dsize, (unsigned)sizeof(struct ctdb_statistics)));
990 *status = *(struct ctdb_statistics *)data.dptr;
991 talloc_free(data.dptr);
997 shutdown a remote ctdb node
999 int ctdb_ctrl_shutdown(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
1001 struct ctdb_client_control_state *state;
1003 state = ctdb_control_send(ctdb, destnode, 0,
1004 CTDB_CONTROL_SHUTDOWN, 0, tdb_null,
1005 NULL, &timeout, NULL);
1006 if (state == NULL) {
1007 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for shutdown failed\n"));
1015 get vnn map from a remote node
1017 int ctdb_ctrl_getvnnmap(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, struct ctdb_vnn_map **vnnmap)
1022 struct ctdb_vnn_map_wire *map;
1024 ret = ctdb_control(ctdb, destnode, 0,
1025 CTDB_CONTROL_GETVNNMAP, 0, tdb_null,
1026 mem_ctx, &outdata, &res, &timeout, NULL);
1027 if (ret != 0 || res != 0) {
1028 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getvnnmap failed\n"));
1032 map = (struct ctdb_vnn_map_wire *)outdata.dptr;
1033 if (outdata.dsize < offsetof(struct ctdb_vnn_map_wire, map) ||
1034 outdata.dsize != map->size*sizeof(uint32_t) + offsetof(struct ctdb_vnn_map_wire, map)) {
1035 DEBUG(DEBUG_ERR,("Bad vnn map size received in ctdb_ctrl_getvnnmap\n"));
1039 (*vnnmap) = talloc(mem_ctx, struct ctdb_vnn_map);
1040 CTDB_NO_MEMORY(ctdb, *vnnmap);
1041 (*vnnmap)->generation = map->generation;
1042 (*vnnmap)->size = map->size;
1043 (*vnnmap)->map = talloc_array(*vnnmap, uint32_t, map->size);
1045 CTDB_NO_MEMORY(ctdb, (*vnnmap)->map);
1046 memcpy((*vnnmap)->map, map->map, sizeof(uint32_t)*map->size);
1047 talloc_free(outdata.dptr);
1054 get the recovery mode of a remote node
1056 struct ctdb_client_control_state *
1057 ctdb_ctrl_getrecmode_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode)
1059 return ctdb_control_send(ctdb, destnode, 0,
1060 CTDB_CONTROL_GET_RECMODE, 0, tdb_null,
1061 mem_ctx, &timeout, NULL);
1064 int ctdb_ctrl_getrecmode_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *recmode)
1069 ret = ctdb_control_recv(ctdb, state, mem_ctx, NULL, &res, NULL);
1071 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_getrecmode_recv failed\n"));
1076 *recmode = (uint32_t)res;
1082 int ctdb_ctrl_getrecmode(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, uint32_t *recmode)
1084 struct ctdb_client_control_state *state;
1086 state = ctdb_ctrl_getrecmode_send(ctdb, mem_ctx, timeout, destnode);
1087 return ctdb_ctrl_getrecmode_recv(ctdb, mem_ctx, state, recmode);
1094 set the recovery mode of a remote node
1096 int ctdb_ctrl_setrecmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmode)
1102 data.dsize = sizeof(uint32_t);
1103 data.dptr = (unsigned char *)&recmode;
1105 ret = ctdb_control(ctdb, destnode, 0,
1106 CTDB_CONTROL_SET_RECMODE, 0, data,
1107 NULL, NULL, &res, &timeout, NULL);
1108 if (ret != 0 || res != 0) {
1109 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setrecmode failed\n"));
1119 get the recovery master of a remote node
1121 struct ctdb_client_control_state *
1122 ctdb_ctrl_getrecmaster_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx,
1123 struct timeval timeout, uint32_t destnode)
1125 return ctdb_control_send(ctdb, destnode, 0,
1126 CTDB_CONTROL_GET_RECMASTER, 0, tdb_null,
1127 mem_ctx, &timeout, NULL);
1130 int ctdb_ctrl_getrecmaster_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *recmaster)
1135 ret = ctdb_control_recv(ctdb, state, mem_ctx, NULL, &res, NULL);
1137 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_getrecmaster_recv failed\n"));
1142 *recmaster = (uint32_t)res;
1148 int ctdb_ctrl_getrecmaster(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, uint32_t *recmaster)
1150 struct ctdb_client_control_state *state;
1152 state = ctdb_ctrl_getrecmaster_send(ctdb, mem_ctx, timeout, destnode);
1153 return ctdb_ctrl_getrecmaster_recv(ctdb, mem_ctx, state, recmaster);
1158 set the recovery master of a remote node
1160 int ctdb_ctrl_setrecmaster(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmaster)
1167 data.dsize = sizeof(uint32_t);
1168 data.dptr = (unsigned char *)&recmaster;
1170 ret = ctdb_control(ctdb, destnode, 0,
1171 CTDB_CONTROL_SET_RECMASTER, 0, data,
1172 NULL, NULL, &res, &timeout, NULL);
1173 if (ret != 0 || res != 0) {
1174 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setrecmaster failed\n"));
1183 get a list of databases off a remote node
1185 int ctdb_ctrl_getdbmap(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode,
1186 TALLOC_CTX *mem_ctx, struct ctdb_dbid_map **dbmap)
1192 ret = ctdb_control(ctdb, destnode, 0,
1193 CTDB_CONTROL_GET_DBMAP, 0, tdb_null,
1194 mem_ctx, &outdata, &res, &timeout, NULL);
1195 if (ret != 0 || res != 0) {
1196 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getdbmap failed ret:%d res:%d\n", ret, res));
1200 *dbmap = (struct ctdb_dbid_map *)talloc_memdup(mem_ctx, outdata.dptr, outdata.dsize);
1201 talloc_free(outdata.dptr);
1207 get a list of nodes (vnn and flags ) from a remote node
1209 int ctdb_ctrl_getnodemap(struct ctdb_context *ctdb,
1210 struct timeval timeout, uint32_t destnode,
1211 TALLOC_CTX *mem_ctx, struct ctdb_node_map **nodemap)
1217 ret = ctdb_control(ctdb, destnode, 0,
1218 CTDB_CONTROL_GET_NODEMAP, 0, tdb_null,
1219 mem_ctx, &outdata, &res, &timeout, NULL);
1220 if (ret == 0 && res == -1 && outdata.dsize == 0) {
1221 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getnodes failed, falling back to ipv4-only control\n"));
1222 return ctdb_ctrl_getnodemapv4(ctdb, timeout, destnode, mem_ctx, nodemap);
1224 if (ret != 0 || res != 0 || outdata.dsize == 0) {
1225 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getnodes failed ret:%d res:%d\n", ret, res));
1229 *nodemap = (struct ctdb_node_map *)talloc_memdup(mem_ctx, outdata.dptr, outdata.dsize);
1230 talloc_free(outdata.dptr);
1236 old style ipv4-only get a list of nodes (vnn and flags ) from a remote node
1238 int ctdb_ctrl_getnodemapv4(struct ctdb_context *ctdb,
1239 struct timeval timeout, uint32_t destnode,
1240 TALLOC_CTX *mem_ctx, struct ctdb_node_map **nodemap)
1244 struct ctdb_node_mapv4 *nodemapv4;
1247 ret = ctdb_control(ctdb, destnode, 0,
1248 CTDB_CONTROL_GET_NODEMAPv4, 0, tdb_null,
1249 mem_ctx, &outdata, &res, &timeout, NULL);
1250 if (ret != 0 || res != 0 || outdata.dsize == 0) {
1251 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getnodesv4 failed ret:%d res:%d\n", ret, res));
1255 nodemapv4 = (struct ctdb_node_mapv4 *)outdata.dptr;
1257 len = offsetof(struct ctdb_node_map, nodes) + nodemapv4->num*sizeof(struct ctdb_node_and_flags);
1258 (*nodemap) = talloc_zero_size(mem_ctx, len);
1259 CTDB_NO_MEMORY(ctdb, (*nodemap));
1261 (*nodemap)->num = nodemapv4->num;
1262 for (i=0; i<nodemapv4->num; i++) {
1263 (*nodemap)->nodes[i].pnn = nodemapv4->nodes[i].pnn;
1264 (*nodemap)->nodes[i].flags = nodemapv4->nodes[i].flags;
1265 (*nodemap)->nodes[i].addr.ip = nodemapv4->nodes[i].sin;
1266 (*nodemap)->nodes[i].addr.sa.sa_family = AF_INET;
1269 talloc_free(outdata.dptr);
1275 drop the transport, reload the nodes file and restart the transport
1277 int ctdb_ctrl_reload_nodes_file(struct ctdb_context *ctdb,
1278 struct timeval timeout, uint32_t destnode)
1283 ret = ctdb_control(ctdb, destnode, 0,
1284 CTDB_CONTROL_RELOAD_NODES_FILE, 0, tdb_null,
1285 NULL, NULL, &res, &timeout, NULL);
1286 if (ret != 0 || res != 0) {
1287 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for reloadnodesfile failed\n"));
1296 set vnn map on a node
1298 int ctdb_ctrl_setvnnmap(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode,
1299 TALLOC_CTX *mem_ctx, struct ctdb_vnn_map *vnnmap)
1304 struct ctdb_vnn_map_wire *map;
1307 len = offsetof(struct ctdb_vnn_map_wire, map) + sizeof(uint32_t)*vnnmap->size;
1308 map = talloc_size(mem_ctx, len);
1309 CTDB_NO_MEMORY(ctdb, map);
1311 map->generation = vnnmap->generation;
1312 map->size = vnnmap->size;
1313 memcpy(map->map, vnnmap->map, sizeof(uint32_t)*map->size);
1316 data.dptr = (uint8_t *)map;
1318 ret = ctdb_control(ctdb, destnode, 0,
1319 CTDB_CONTROL_SETVNNMAP, 0, data,
1320 NULL, NULL, &res, &timeout, NULL);
1321 if (ret != 0 || res != 0) {
1322 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setvnnmap failed\n"));
1333 async send for pull database
1335 struct ctdb_client_control_state *ctdb_ctrl_pulldb_send(
1336 struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid,
1337 uint32_t lmaster, TALLOC_CTX *mem_ctx, struct timeval timeout)
1340 struct ctdb_control_pulldb *pull;
1341 struct ctdb_client_control_state *state;
1343 pull = talloc(mem_ctx, struct ctdb_control_pulldb);
1344 CTDB_NO_MEMORY_NULL(ctdb, pull);
1347 pull->lmaster = lmaster;
1349 indata.dsize = sizeof(struct ctdb_control_pulldb);
1350 indata.dptr = (unsigned char *)pull;
1352 state = ctdb_control_send(ctdb, destnode, 0,
1353 CTDB_CONTROL_PULL_DB, 0, indata,
1354 mem_ctx, &timeout, NULL);
1361 async recv for pull database
1363 int ctdb_ctrl_pulldb_recv(
1364 struct ctdb_context *ctdb,
1365 TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state,
1371 ret = ctdb_control_recv(ctdb, state, mem_ctx, outdata, &res, NULL);
1372 if ( (ret != 0) || (res != 0) ){
1373 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_pulldb_recv failed\n"));
1381 pull all keys and records for a specific database on a node
1383 int ctdb_ctrl_pulldb(struct ctdb_context *ctdb, uint32_t destnode,
1384 uint32_t dbid, uint32_t lmaster,
1385 TALLOC_CTX *mem_ctx, struct timeval timeout,
1388 struct ctdb_client_control_state *state;
1390 state = ctdb_ctrl_pulldb_send(ctdb, destnode, dbid, lmaster, mem_ctx,
1393 return ctdb_ctrl_pulldb_recv(ctdb, mem_ctx, state, outdata);
1398 change dmaster for all keys in the database to the new value
1400 int ctdb_ctrl_setdmaster(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode,
1401 TALLOC_CTX *mem_ctx, uint32_t dbid, uint32_t dmaster)
1407 indata.dsize = 2*sizeof(uint32_t);
1408 indata.dptr = (unsigned char *)talloc_array(mem_ctx, uint32_t, 2);
1410 ((uint32_t *)(&indata.dptr[0]))[0] = dbid;
1411 ((uint32_t *)(&indata.dptr[0]))[1] = dmaster;
1413 ret = ctdb_control(ctdb, destnode, 0,
1414 CTDB_CONTROL_SET_DMASTER, 0, indata,
1415 NULL, NULL, &res, &timeout, NULL);
1416 if (ret != 0 || res != 0) {
1417 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setdmaster failed\n"));
1425 ping a node, return number of clients connected
1427 int ctdb_ctrl_ping(struct ctdb_context *ctdb, uint32_t destnode)
1432 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_PING, 0,
1433 tdb_null, NULL, NULL, &res, NULL, NULL);
1441 find the real path to a ltdb
1443 int ctdb_ctrl_getdbpath(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx,
1450 data.dptr = (uint8_t *)&dbid;
1451 data.dsize = sizeof(dbid);
1453 ret = ctdb_control(ctdb, destnode, 0,
1454 CTDB_CONTROL_GETDBPATH, 0, data,
1455 mem_ctx, &data, &res, &timeout, NULL);
1456 if (ret != 0 || res != 0) {
1460 (*path) = talloc_strndup(mem_ctx, (const char *)data.dptr, data.dsize);
1461 if ((*path) == NULL) {
1465 talloc_free(data.dptr);
1471 find the name of a db
1473 int ctdb_ctrl_getdbname(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx,
1480 data.dptr = (uint8_t *)&dbid;
1481 data.dsize = sizeof(dbid);
1483 ret = ctdb_control(ctdb, destnode, 0,
1484 CTDB_CONTROL_GET_DBNAME, 0, data,
1485 mem_ctx, &data, &res, &timeout, NULL);
1486 if (ret != 0 || res != 0) {
1490 (*name) = talloc_strndup(mem_ctx, (const char *)data.dptr, data.dsize);
1491 if ((*name) == NULL) {
1495 talloc_free(data.dptr);
1503 int ctdb_ctrl_createdb(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode,
1504 TALLOC_CTX *mem_ctx, const char *name, bool persistent)
1510 data.dptr = discard_const(name);
1511 data.dsize = strlen(name)+1;
1513 ret = ctdb_control(ctdb, destnode, 0,
1514 persistent?CTDB_CONTROL_DB_ATTACH_PERSISTENT:CTDB_CONTROL_DB_ATTACH,
1516 mem_ctx, &data, &res, &timeout, NULL);
1518 if (ret != 0 || res != 0) {
1526 get debug level on a node
1528 int ctdb_ctrl_get_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, int32_t *level)
1534 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_GET_DEBUG, 0, tdb_null,
1535 ctdb, &data, &res, NULL, NULL);
1536 if (ret != 0 || res != 0) {
1539 if (data.dsize != sizeof(int32_t)) {
1540 DEBUG(DEBUG_ERR,("Bad control reply size in ctdb_get_debuglevel (got %u)\n",
1541 (unsigned)data.dsize));
1544 *level = *(int32_t *)data.dptr;
1545 talloc_free(data.dptr);
1550 set debug level on a node
1552 int ctdb_ctrl_set_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, int32_t level)
1558 data.dptr = (uint8_t *)&level;
1559 data.dsize = sizeof(level);
1561 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_SET_DEBUG, 0, data,
1562 NULL, NULL, &res, NULL, NULL);
1563 if (ret != 0 || res != 0) {
1571 get a list of connected nodes
1573 uint32_t *ctdb_get_connected_nodes(struct ctdb_context *ctdb,
1574 struct timeval timeout,
1575 TALLOC_CTX *mem_ctx,
1576 uint32_t *num_nodes)
1578 struct ctdb_node_map *map=NULL;
1584 ret = ctdb_ctrl_getnodemap(ctdb, timeout, CTDB_CURRENT_NODE, mem_ctx, &map);
1589 nodes = talloc_array(mem_ctx, uint32_t, map->num);
1590 if (nodes == NULL) {
1594 for (i=0;i<map->num;i++) {
1595 if (!(map->nodes[i].flags & NODE_FLAGS_DISCONNECTED)) {
1596 nodes[*num_nodes] = map->nodes[i].pnn;
1608 int ctdb_statistics_reset(struct ctdb_context *ctdb, uint32_t destnode)
1613 ret = ctdb_control(ctdb, destnode, 0,
1614 CTDB_CONTROL_STATISTICS_RESET, 0, tdb_null,
1615 NULL, NULL, &res, NULL, NULL);
1616 if (ret != 0 || res != 0) {
1617 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for reset statistics failed\n"));
1624 this is the dummy null procedure that all databases support
1626 static int ctdb_null_func(struct ctdb_call_info *call)
1632 this is a plain fetch procedure that all databases support
1634 static int ctdb_fetch_func(struct ctdb_call_info *call)
1636 call->reply_data = &call->record_data;
1641 attach to a specific database - client call
1643 struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name, bool persistent, uint32_t tdb_flags)
1645 struct ctdb_db_context *ctdb_db;
1650 ctdb_db = ctdb_db_handle(ctdb, name);
1655 ctdb_db = talloc_zero(ctdb, struct ctdb_db_context);
1656 CTDB_NO_MEMORY_NULL(ctdb, ctdb_db);
1658 ctdb_db->ctdb = ctdb;
1659 ctdb_db->db_name = talloc_strdup(ctdb_db, name);
1660 CTDB_NO_MEMORY_NULL(ctdb, ctdb_db->db_name);
1662 data.dptr = discard_const(name);
1663 data.dsize = strlen(name)+1;
1665 /* tell ctdb daemon to attach */
1666 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, tdb_flags,
1667 persistent?CTDB_CONTROL_DB_ATTACH_PERSISTENT:CTDB_CONTROL_DB_ATTACH,
1668 0, data, ctdb_db, &data, &res, NULL, NULL);
1669 if (ret != 0 || res != 0 || data.dsize != sizeof(uint32_t)) {
1670 DEBUG(DEBUG_ERR,("Failed to attach to database '%s'\n", name));
1671 talloc_free(ctdb_db);
1675 ctdb_db->db_id = *(uint32_t *)data.dptr;
1676 talloc_free(data.dptr);
1678 ret = ctdb_ctrl_getdbpath(ctdb, timeval_current_ofs(2, 0), CTDB_CURRENT_NODE, ctdb_db->db_id, ctdb_db, &ctdb_db->db_path);
1680 DEBUG(DEBUG_ERR,("Failed to get dbpath for database '%s'\n", name));
1681 talloc_free(ctdb_db);
1685 tdb_flags = persistent?TDB_DEFAULT:TDB_NOSYNC;
1686 if (!ctdb->do_setsched) {
1687 tdb_flags |= TDB_NOMMAP;
1690 ctdb_db->ltdb = tdb_wrap_open(ctdb, ctdb_db->db_path, 0, tdb_flags, O_RDWR, 0);
1691 if (ctdb_db->ltdb == NULL) {
1692 ctdb_set_error(ctdb, "Failed to open tdb '%s'\n", ctdb_db->db_path);
1693 talloc_free(ctdb_db);
1697 ctdb_db->persistent = persistent;
1699 DLIST_ADD(ctdb->db_list, ctdb_db);
1701 /* add well known functions */
1702 ctdb_set_call(ctdb_db, ctdb_null_func, CTDB_NULL_FUNC);
1703 ctdb_set_call(ctdb_db, ctdb_fetch_func, CTDB_FETCH_FUNC);
1710 setup a call for a database
1712 int ctdb_set_call(struct ctdb_db_context *ctdb_db, ctdb_fn_t fn, uint32_t id)
1714 struct ctdb_registered_call *call;
1719 struct ctdb_control_set_call c;
1722 /* this is no longer valid with the separate daemon architecture */
1723 c.db_id = ctdb_db->db_id;
1727 data.dptr = (uint8_t *)&c;
1728 data.dsize = sizeof(c);
1730 ret = ctdb_control(ctdb_db->ctdb, CTDB_CURRENT_NODE, 0, CTDB_CONTROL_SET_CALL, 0,
1731 data, NULL, NULL, &status, NULL, NULL);
1732 if (ret != 0 || status != 0) {
1733 DEBUG(DEBUG_ERR,("ctdb_set_call failed for call %u\n", id));
1738 /* also register locally */
1739 call = talloc(ctdb_db, struct ctdb_registered_call);
1743 DLIST_ADD(ctdb_db->calls, call);
1748 struct traverse_state {
1751 ctdb_traverse_func fn;
1756 called on each key during a ctdb_traverse
1758 static void traverse_handler(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data, void *p)
1760 struct traverse_state *state = (struct traverse_state *)p;
1761 struct ctdb_rec_data *d = (struct ctdb_rec_data *)data.dptr;
1764 if (data.dsize < sizeof(uint32_t) ||
1765 d->length != data.dsize) {
1766 DEBUG(DEBUG_ERR,("Bad data size %u in traverse_handler\n", (unsigned)data.dsize));
1771 key.dsize = d->keylen;
1772 key.dptr = &d->data[0];
1773 data.dsize = d->datalen;
1774 data.dptr = &d->data[d->keylen];
1776 if (key.dsize == 0 && data.dsize == 0) {
1777 /* end of traverse */
1782 if (data.dsize == sizeof(struct ctdb_ltdb_header)) {
1783 /* empty records are deleted records in ctdb */
1787 if (state->fn(ctdb, key, data, state->private_data) != 0) {
1796 start a cluster wide traverse, calling the supplied fn on each record
1797 return the number of records traversed, or -1 on error
1799 int ctdb_traverse(struct ctdb_db_context *ctdb_db, ctdb_traverse_func fn, void *private_data)
1802 struct ctdb_traverse_start t;
1805 uint64_t srvid = (getpid() | 0xFLL<<60);
1806 struct traverse_state state;
1810 state.private_data = private_data;
1813 ret = ctdb_set_message_handler(ctdb_db->ctdb, srvid, traverse_handler, &state);
1815 DEBUG(DEBUG_ERR,("Failed to setup traverse handler\n"));
1819 t.db_id = ctdb_db->db_id;
1823 data.dptr = (uint8_t *)&t;
1824 data.dsize = sizeof(t);
1826 ret = ctdb_control(ctdb_db->ctdb, CTDB_CURRENT_NODE, 0, CTDB_CONTROL_TRAVERSE_START, 0,
1827 data, NULL, NULL, &status, NULL, NULL);
1828 if (ret != 0 || status != 0) {
1829 DEBUG(DEBUG_ERR,("ctdb_traverse_all failed\n"));
1830 ctdb_remove_message_handler(ctdb_db->ctdb, srvid, &state);
1834 while (!state.done) {
1835 event_loop_once(ctdb_db->ctdb->ev);
1838 ret = ctdb_remove_message_handler(ctdb_db->ctdb, srvid, &state);
1840 DEBUG(DEBUG_ERR,("Failed to remove ctdb_traverse handler\n"));
1847 #define ISASCII(x) ((x>31)&&(x<128))
1849 called on each key during a catdb
1851 static int dumpdb_fn(struct ctdb_context *ctdb, TDB_DATA key, TDB_DATA data, void *p)
1854 FILE *f = (FILE *)p;
1855 struct ctdb_ltdb_header *h = (struct ctdb_ltdb_header *)data.dptr;
1857 fprintf(f, "key(%u) = \"", (unsigned)key.dsize);
1858 for (i=0;i<key.dsize;i++) {
1859 if (ISASCII(key.dptr[i])) {
1860 fprintf(f, "%c", key.dptr[i]);
1862 fprintf(f, "\\%02X", key.dptr[i]);
1867 fprintf(f, "dmaster: %u\n", h->dmaster);
1868 fprintf(f, "rsn: %llu\n", (unsigned long long)h->rsn);
1870 fprintf(f, "data(%u) = \"", (unsigned)data.dsize);
1871 for (i=sizeof(*h);i<data.dsize;i++) {
1872 if (ISASCII(data.dptr[i])) {
1873 fprintf(f, "%c", data.dptr[i]);
1875 fprintf(f, "\\%02X", data.dptr[i]);
1886 convenience function to list all keys to stdout
1888 int ctdb_dump_db(struct ctdb_db_context *ctdb_db, FILE *f)
1890 return ctdb_traverse(ctdb_db, dumpdb_fn, f);
1894 get the pid of a ctdb daemon
1896 int ctdb_ctrl_getpid(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *pid)
1901 ret = ctdb_control(ctdb, destnode, 0,
1902 CTDB_CONTROL_GET_PID, 0, tdb_null,
1903 NULL, NULL, &res, &timeout, NULL);
1905 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getpid failed\n"));
1916 async freeze send control
1918 struct ctdb_client_control_state *
1919 ctdb_ctrl_freeze_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, uint32_t priority)
1921 return ctdb_control_send(ctdb, destnode, priority,
1922 CTDB_CONTROL_FREEZE, 0, tdb_null,
1923 mem_ctx, &timeout, NULL);
1927 async freeze recv control
1929 int ctdb_ctrl_freeze_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state)
1934 ret = ctdb_control_recv(ctdb, state, mem_ctx, NULL, &res, NULL);
1935 if ( (ret != 0) || (res != 0) ){
1936 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_freeze_recv failed\n"));
1944 freeze databases of a certain priority
1946 int ctdb_ctrl_freeze_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t priority)
1948 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
1949 struct ctdb_client_control_state *state;
1952 state = ctdb_ctrl_freeze_send(ctdb, tmp_ctx, timeout, destnode, priority);
1953 ret = ctdb_ctrl_freeze_recv(ctdb, tmp_ctx, state);
1954 talloc_free(tmp_ctx);
1959 /* Freeze all databases */
1960 int ctdb_ctrl_freeze(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
1964 for (i=1; i<=NUM_DB_PRIORITIES; i++) {
1965 if (ctdb_ctrl_freeze_priority(ctdb, timeout, destnode, i) != 0) {
1973 thaw databases of a certain priority
1975 int ctdb_ctrl_thaw_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t priority)
1980 ret = ctdb_control(ctdb, destnode, priority,
1981 CTDB_CONTROL_THAW, 0, tdb_null,
1982 NULL, NULL, &res, &timeout, NULL);
1983 if (ret != 0 || res != 0) {
1984 DEBUG(DEBUG_ERR,(__location__ " ctdb_control thaw failed\n"));
1991 /* thaw all databases */
1992 int ctdb_ctrl_thaw(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
1994 return ctdb_ctrl_thaw_priority(ctdb, timeout, destnode, 0);
1998 get pnn of a node, or -1
2000 int ctdb_ctrl_getpnn(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
2005 ret = ctdb_control(ctdb, destnode, 0,
2006 CTDB_CONTROL_GET_PNN, 0, tdb_null,
2007 NULL, NULL, &res, &timeout, NULL);
2009 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getpnn failed\n"));
2017 get the monitoring mode of a remote node
2019 int ctdb_ctrl_getmonmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *monmode)
2024 ret = ctdb_control(ctdb, destnode, 0,
2025 CTDB_CONTROL_GET_MONMODE, 0, tdb_null,
2026 NULL, NULL, &res, &timeout, NULL);
2028 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getmonmode failed\n"));
2039 set the monitoring mode of a remote node to active
2041 int ctdb_ctrl_enable_monmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
2046 ret = ctdb_control(ctdb, destnode, 0,
2047 CTDB_CONTROL_ENABLE_MONITOR, 0, tdb_null,
2048 NULL, NULL,NULL, &timeout, NULL);
2050 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for enable_monitor failed\n"));
2060 set the monitoring mode of a remote node to disable
2062 int ctdb_ctrl_disable_monmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
2067 ret = ctdb_control(ctdb, destnode, 0,
2068 CTDB_CONTROL_DISABLE_MONITOR, 0, tdb_null,
2069 NULL, NULL, NULL, &timeout, NULL);
2071 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for disable_monitor failed\n"));
2083 sent to a node to make it take over an ip address
2085 int ctdb_ctrl_takeover_ip(struct ctdb_context *ctdb, struct timeval timeout,
2086 uint32_t destnode, struct ctdb_public_ip *ip)
2089 struct ctdb_public_ipv4 ipv4;
2093 if (ip->addr.sa.sa_family == AF_INET) {
2095 ipv4.sin = ip->addr.ip;
2097 data.dsize = sizeof(ipv4);
2098 data.dptr = (uint8_t *)&ipv4;
2100 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_TAKEOVER_IPv4, 0, data, NULL,
2101 NULL, &res, &timeout, NULL);
2103 data.dsize = sizeof(*ip);
2104 data.dptr = (uint8_t *)ip;
2106 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_TAKEOVER_IP, 0, data, NULL,
2107 NULL, &res, &timeout, NULL);
2110 if (ret != 0 || res != 0) {
2111 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for takeover_ip failed\n"));
2120 sent to a node to make it release an ip address
2122 int ctdb_ctrl_release_ip(struct ctdb_context *ctdb, struct timeval timeout,
2123 uint32_t destnode, struct ctdb_public_ip *ip)
2126 struct ctdb_public_ipv4 ipv4;
2130 if (ip->addr.sa.sa_family == AF_INET) {
2132 ipv4.sin = ip->addr.ip;
2134 data.dsize = sizeof(ipv4);
2135 data.dptr = (uint8_t *)&ipv4;
2137 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_RELEASE_IPv4, 0, data, NULL,
2138 NULL, &res, &timeout, NULL);
2140 data.dsize = sizeof(*ip);
2141 data.dptr = (uint8_t *)ip;
2143 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_RELEASE_IP, 0, data, NULL,
2144 NULL, &res, &timeout, NULL);
2147 if (ret != 0 || res != 0) {
2148 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for release_ip failed\n"));
2159 int ctdb_ctrl_get_tunable(struct ctdb_context *ctdb,
2160 struct timeval timeout,
2162 const char *name, uint32_t *value)
2164 struct ctdb_control_get_tunable *t;
2165 TDB_DATA data, outdata;
2169 data.dsize = offsetof(struct ctdb_control_get_tunable, name) + strlen(name) + 1;
2170 data.dptr = talloc_size(ctdb, data.dsize);
2171 CTDB_NO_MEMORY(ctdb, data.dptr);
2173 t = (struct ctdb_control_get_tunable *)data.dptr;
2174 t->length = strlen(name)+1;
2175 memcpy(t->name, name, t->length);
2177 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_GET_TUNABLE, 0, data, ctdb,
2178 &outdata, &res, &timeout, NULL);
2179 talloc_free(data.dptr);
2180 if (ret != 0 || res != 0) {
2181 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for get_tunable failed\n"));
2185 if (outdata.dsize != sizeof(uint32_t)) {
2186 DEBUG(DEBUG_ERR,("Invalid return data in get_tunable\n"));
2187 talloc_free(outdata.dptr);
2191 *value = *(uint32_t *)outdata.dptr;
2192 talloc_free(outdata.dptr);
2200 int ctdb_ctrl_set_tunable(struct ctdb_context *ctdb,
2201 struct timeval timeout,
2203 const char *name, uint32_t value)
2205 struct ctdb_control_set_tunable *t;
2210 data.dsize = offsetof(struct ctdb_control_set_tunable, name) + strlen(name) + 1;
2211 data.dptr = talloc_size(ctdb, data.dsize);
2212 CTDB_NO_MEMORY(ctdb, data.dptr);
2214 t = (struct ctdb_control_set_tunable *)data.dptr;
2215 t->length = strlen(name)+1;
2216 memcpy(t->name, name, t->length);
2219 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_SET_TUNABLE, 0, data, NULL,
2220 NULL, &res, &timeout, NULL);
2221 talloc_free(data.dptr);
2222 if (ret != 0 || res != 0) {
2223 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for set_tunable failed\n"));
2233 int ctdb_ctrl_list_tunables(struct ctdb_context *ctdb,
2234 struct timeval timeout,
2236 TALLOC_CTX *mem_ctx,
2237 const char ***list, uint32_t *count)
2242 struct ctdb_control_list_tunable *t;
2245 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_LIST_TUNABLES, 0, tdb_null,
2246 mem_ctx, &outdata, &res, &timeout, NULL);
2247 if (ret != 0 || res != 0) {
2248 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for list_tunables failed\n"));
2252 t = (struct ctdb_control_list_tunable *)outdata.dptr;
2253 if (outdata.dsize < offsetof(struct ctdb_control_list_tunable, data) ||
2254 t->length > outdata.dsize-offsetof(struct ctdb_control_list_tunable, data)) {
2255 DEBUG(DEBUG_ERR,("Invalid data in list_tunables reply\n"));
2256 talloc_free(outdata.dptr);
2260 p = talloc_strndup(mem_ctx, (char *)t->data, t->length);
2261 CTDB_NO_MEMORY(ctdb, p);
2263 talloc_free(outdata.dptr);
2268 for (s=strtok_r(p, ":", &ptr); s; s=strtok_r(NULL, ":", &ptr)) {
2269 (*list) = talloc_realloc(mem_ctx, *list, const char *, 1+(*count));
2270 CTDB_NO_MEMORY(ctdb, *list);
2271 (*list)[*count] = talloc_strdup(*list, s);
2272 CTDB_NO_MEMORY(ctdb, (*list)[*count]);
2282 int ctdb_ctrl_get_public_ips(struct ctdb_context *ctdb,
2283 struct timeval timeout, uint32_t destnode,
2284 TALLOC_CTX *mem_ctx, struct ctdb_all_public_ips **ips)
2290 ret = ctdb_control(ctdb, destnode, 0,
2291 CTDB_CONTROL_GET_PUBLIC_IPS, 0, tdb_null,
2292 mem_ctx, &outdata, &res, &timeout, NULL);
2293 if (ret == 0 && res == -1) {
2294 DEBUG(DEBUG_ERR,(__location__ " ctdb_control to get public ips failed, falling back to ipv4-only version\n"));
2295 return ctdb_ctrl_get_public_ipsv4(ctdb, timeout, destnode, mem_ctx, ips);
2297 if (ret != 0 || res != 0) {
2298 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getpublicips failed ret:%d res:%d\n", ret, res));
2302 *ips = (struct ctdb_all_public_ips *)talloc_memdup(mem_ctx, outdata.dptr, outdata.dsize);
2303 talloc_free(outdata.dptr);
2308 int ctdb_ctrl_get_public_ipsv4(struct ctdb_context *ctdb,
2309 struct timeval timeout, uint32_t destnode,
2310 TALLOC_CTX *mem_ctx, struct ctdb_all_public_ips **ips)
2315 struct ctdb_all_public_ipsv4 *ipsv4;
2317 ret = ctdb_control(ctdb, destnode, 0,
2318 CTDB_CONTROL_GET_PUBLIC_IPSv4, 0, tdb_null,
2319 mem_ctx, &outdata, &res, &timeout, NULL);
2320 if (ret != 0 || res != 0) {
2321 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getpublicips failed\n"));
2325 ipsv4 = (struct ctdb_all_public_ipsv4 *)outdata.dptr;
2326 len = offsetof(struct ctdb_all_public_ips, ips) +
2327 ipsv4->num*sizeof(struct ctdb_public_ip);
2328 *ips = talloc_zero_size(mem_ctx, len);
2329 CTDB_NO_MEMORY(ctdb, *ips);
2330 (*ips)->num = ipsv4->num;
2331 for (i=0; i<ipsv4->num; i++) {
2332 (*ips)->ips[i].pnn = ipsv4->ips[i].pnn;
2333 (*ips)->ips[i].addr.ip = ipsv4->ips[i].sin;
2336 talloc_free(outdata.dptr);
2342 set/clear the permanent disabled bit on a remote node
2344 int ctdb_ctrl_modflags(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode,
2345 uint32_t set, uint32_t clear)
2349 struct ctdb_node_map *nodemap=NULL;
2350 struct ctdb_node_flag_change c;
2351 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
2356 /* find the recovery master */
2357 ret = ctdb_ctrl_getrecmaster(ctdb, tmp_ctx, timeout, CTDB_CURRENT_NODE, &recmaster);
2359 DEBUG(DEBUG_ERR, (__location__ " Unable to get recmaster from local node\n"));
2360 talloc_free(tmp_ctx);
2365 /* read the node flags from the recmaster */
2366 ret = ctdb_ctrl_getnodemap(ctdb, timeout, recmaster, tmp_ctx, &nodemap);
2368 DEBUG(DEBUG_ERR, (__location__ " Unable to get nodemap from node %u\n", destnode));
2369 talloc_free(tmp_ctx);
2372 if (destnode >= nodemap->num) {
2373 DEBUG(DEBUG_ERR,(__location__ " Nodemap from recmaster does not contain node %d\n", destnode));
2374 talloc_free(tmp_ctx);
2379 c.old_flags = nodemap->nodes[destnode].flags;
2380 c.new_flags = c.old_flags;
2382 c.new_flags &= ~clear;
2384 data.dsize = sizeof(c);
2385 data.dptr = (unsigned char *)&c;
2387 /* send the flags update to all connected nodes */
2388 nodes = list_of_connected_nodes(ctdb, nodemap, tmp_ctx, true);
2390 if (ctdb_client_async_control(ctdb, CTDB_CONTROL_MODIFY_FLAGS,
2392 timeout, false, data,
2395 DEBUG(DEBUG_ERR, (__location__ " Unable to update nodeflags on remote nodes\n"));
2397 talloc_free(tmp_ctx);
2401 talloc_free(tmp_ctx);
2409 int ctdb_ctrl_get_all_tunables(struct ctdb_context *ctdb,
2410 struct timeval timeout,
2412 struct ctdb_tunable *tunables)
2418 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_GET_ALL_TUNABLES, 0, tdb_null, ctdb,
2419 &outdata, &res, &timeout, NULL);
2420 if (ret != 0 || res != 0) {
2421 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for get all tunables failed\n"));
2425 if (outdata.dsize != sizeof(*tunables)) {
2426 DEBUG(DEBUG_ERR,(__location__ " bad data size %u in ctdb_ctrl_get_all_tunables should be %u\n",
2427 (unsigned)outdata.dsize, (unsigned)sizeof(*tunables)));
2431 *tunables = *(struct ctdb_tunable *)outdata.dptr;
2432 talloc_free(outdata.dptr);
2437 add a public address to a node
2439 int ctdb_ctrl_add_public_ip(struct ctdb_context *ctdb,
2440 struct timeval timeout,
2442 struct ctdb_control_ip_iface *pub)
2448 data.dsize = offsetof(struct ctdb_control_ip_iface, iface) + pub->len;
2449 data.dptr = (unsigned char *)pub;
2451 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_ADD_PUBLIC_IP, 0, data, NULL,
2452 NULL, &res, &timeout, NULL);
2453 if (ret != 0 || res != 0) {
2454 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for add_public_ip failed\n"));
2462 delete a public address from a node
2464 int ctdb_ctrl_del_public_ip(struct ctdb_context *ctdb,
2465 struct timeval timeout,
2467 struct ctdb_control_ip_iface *pub)
2473 data.dsize = offsetof(struct ctdb_control_ip_iface, iface) + pub->len;
2474 data.dptr = (unsigned char *)pub;
2476 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_DEL_PUBLIC_IP, 0, data, NULL,
2477 NULL, &res, &timeout, NULL);
2478 if (ret != 0 || res != 0) {
2479 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for del_public_ip failed\n"));
2487 kill a tcp connection
2489 int ctdb_ctrl_killtcp(struct ctdb_context *ctdb,
2490 struct timeval timeout,
2492 struct ctdb_control_killtcp *killtcp)
2498 data.dsize = sizeof(struct ctdb_control_killtcp);
2499 data.dptr = (unsigned char *)killtcp;
2501 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_KILL_TCP, 0, data, NULL,
2502 NULL, &res, &timeout, NULL);
2503 if (ret != 0 || res != 0) {
2504 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for killtcp failed\n"));
2514 int ctdb_ctrl_gratious_arp(struct ctdb_context *ctdb,
2515 struct timeval timeout,
2517 ctdb_sock_addr *addr,
2523 struct ctdb_control_gratious_arp *gratious_arp;
2524 TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
2527 len = strlen(ifname)+1;
2528 gratious_arp = talloc_size(tmp_ctx,
2529 offsetof(struct ctdb_control_gratious_arp, iface) + len);
2530 CTDB_NO_MEMORY(ctdb, gratious_arp);
2532 gratious_arp->addr = *addr;
2533 gratious_arp->len = len;
2534 memcpy(&gratious_arp->iface[0], ifname, len);
2537 data.dsize = offsetof(struct ctdb_control_gratious_arp, iface) + len;
2538 data.dptr = (unsigned char *)gratious_arp;
2540 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_SEND_GRATIOUS_ARP, 0, data, NULL,
2541 NULL, &res, &timeout, NULL);
2542 if (ret != 0 || res != 0) {
2543 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for gratious_arp failed\n"));
2544 talloc_free(tmp_ctx);
2548 talloc_free(tmp_ctx);
2553 get a list of all tcp tickles that a node knows about for a particular vnn
2555 int ctdb_ctrl_get_tcp_tickles(struct ctdb_context *ctdb,
2556 struct timeval timeout, uint32_t destnode,
2557 TALLOC_CTX *mem_ctx,
2558 ctdb_sock_addr *addr,
2559 struct ctdb_control_tcp_tickle_list **list)
2562 TDB_DATA data, outdata;
2565 data.dptr = (uint8_t*)addr;
2566 data.dsize = sizeof(ctdb_sock_addr);
2568 ret = ctdb_control(ctdb, destnode, 0,
2569 CTDB_CONTROL_GET_TCP_TICKLE_LIST, 0, data,
2570 mem_ctx, &outdata, &status, NULL, NULL);
2571 if (ret != 0 || status != 0) {
2572 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for get tcp tickles failed\n"));
2576 *list = (struct ctdb_control_tcp_tickle_list *)outdata.dptr;
2582 register a server id
2584 int ctdb_ctrl_register_server_id(struct ctdb_context *ctdb,
2585 struct timeval timeout,
2586 struct ctdb_server_id *id)
2592 data.dsize = sizeof(struct ctdb_server_id);
2593 data.dptr = (unsigned char *)id;
2595 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, 0,
2596 CTDB_CONTROL_REGISTER_SERVER_ID,
2598 NULL, &res, &timeout, NULL);
2599 if (ret != 0 || res != 0) {
2600 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for register server id failed\n"));
2608 unregister a server id
2610 int ctdb_ctrl_unregister_server_id(struct ctdb_context *ctdb,
2611 struct timeval timeout,
2612 struct ctdb_server_id *id)
2618 data.dsize = sizeof(struct ctdb_server_id);
2619 data.dptr = (unsigned char *)id;
2621 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, 0,
2622 CTDB_CONTROL_UNREGISTER_SERVER_ID,
2624 NULL, &res, &timeout, NULL);
2625 if (ret != 0 || res != 0) {
2626 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for unregister server id failed\n"));
2635 check if a server id exists
2637 if a server id does exist, return *status == 1, otherwise *status == 0
2639 int ctdb_ctrl_check_server_id(struct ctdb_context *ctdb,
2640 struct timeval timeout,
2642 struct ctdb_server_id *id,
2649 data.dsize = sizeof(struct ctdb_server_id);
2650 data.dptr = (unsigned char *)id;
2652 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_CHECK_SERVER_ID,
2654 NULL, &res, &timeout, NULL);
2656 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for check server id failed\n"));
2670 get the list of server ids that are registered on a node
2672 int ctdb_ctrl_get_server_id_list(struct ctdb_context *ctdb,
2673 TALLOC_CTX *mem_ctx,
2674 struct timeval timeout, uint32_t destnode,
2675 struct ctdb_server_id_list **svid_list)
2681 ret = ctdb_control(ctdb, destnode, 0,
2682 CTDB_CONTROL_GET_SERVER_ID_LIST, 0, tdb_null,
2683 mem_ctx, &outdata, &res, &timeout, NULL);
2684 if (ret != 0 || res != 0) {
2685 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for get_server_id_list failed\n"));
2689 *svid_list = (struct ctdb_server_id_list *)talloc_steal(mem_ctx, outdata.dptr);
2695 initialise the ctdb daemon for client applications
2697 NOTE: In current code the daemon does not fork. This is for testing purposes only
2698 and to simplify the code.
2700 struct ctdb_context *ctdb_init(struct event_context *ev)
2703 struct ctdb_context *ctdb;
2705 ctdb = talloc_zero(ev, struct ctdb_context);
2707 DEBUG(DEBUG_ERR,(__location__ " talloc_zero failed.\n"));
2711 ctdb->idr = idr_init(ctdb);
2712 CTDB_NO_MEMORY_NULL(ctdb, ctdb->idr);
2714 ret = ctdb_set_socketname(ctdb, CTDB_PATH);
2716 DEBUG(DEBUG_ERR,(__location__ " ctdb_set_socketname failed.\n"));
2728 void ctdb_set_flags(struct ctdb_context *ctdb, unsigned flags)
2730 ctdb->flags |= flags;
2734 setup the local socket name
2736 int ctdb_set_socketname(struct ctdb_context *ctdb, const char *socketname)
2738 ctdb->daemon.name = talloc_strdup(ctdb, socketname);
2739 CTDB_NO_MEMORY(ctdb, ctdb->daemon.name);
2745 return the pnn of this node
2747 uint32_t ctdb_get_pnn(struct ctdb_context *ctdb)
2754 get the uptime of a remote node
2756 struct ctdb_client_control_state *
2757 ctdb_ctrl_uptime_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode)
2759 return ctdb_control_send(ctdb, destnode, 0,
2760 CTDB_CONTROL_UPTIME, 0, tdb_null,
2761 mem_ctx, &timeout, NULL);
2764 int ctdb_ctrl_uptime_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, struct ctdb_uptime **uptime)
2770 ret = ctdb_control_recv(ctdb, state, mem_ctx, &outdata, &res, NULL);
2771 if (ret != 0 || res != 0) {
2772 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_uptime_recv failed\n"));
2776 *uptime = (struct ctdb_uptime *)talloc_steal(mem_ctx, outdata.dptr);
2781 int ctdb_ctrl_uptime(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode, struct ctdb_uptime **uptime)
2783 struct ctdb_client_control_state *state;
2785 state = ctdb_ctrl_uptime_send(ctdb, mem_ctx, timeout, destnode);
2786 return ctdb_ctrl_uptime_recv(ctdb, mem_ctx, state, uptime);
2790 send a control to execute the "recovered" event script on a node
2792 int ctdb_ctrl_end_recovery(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
2797 ret = ctdb_control(ctdb, destnode, 0,
2798 CTDB_CONTROL_END_RECOVERY, 0, tdb_null,
2799 NULL, NULL, &status, &timeout, NULL);
2800 if (ret != 0 || status != 0) {
2801 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for end_recovery failed\n"));
2809 callback for the async helpers used when sending the same control
2810 to multiple nodes in parallell.
2812 static void async_callback(struct ctdb_client_control_state *state)
2814 struct client_async_data *data = talloc_get_type(state->async.private_data, struct client_async_data);
2815 struct ctdb_context *ctdb = talloc_get_type(state->ctdb, struct ctdb_context);
2819 uint32_t destnode = state->c->hdr.destnode;
2821 /* one more node has responded with recmode data */
2824 /* if we failed to push the db, then return an error and let
2825 the main loop try again.
2827 if (state->state != CTDB_CONTROL_DONE) {
2828 if ( !data->dont_log_errors) {
2829 DEBUG(DEBUG_ERR,("Async operation failed with state %d, opcode:%u\n", state->state, data->opcode));
2832 if (data->fail_callback) {
2833 data->fail_callback(ctdb, destnode, res, outdata,
2834 data->callback_data);
2839 state->async.fn = NULL;
2841 ret = ctdb_control_recv(ctdb, state, data, &outdata, &res, NULL);
2842 if ((ret != 0) || (res != 0)) {
2843 if ( !data->dont_log_errors) {
2844 DEBUG(DEBUG_ERR,("Async operation failed with ret=%d res=%d opcode=%u\n", ret, (int)res, data->opcode));
2847 if (data->fail_callback) {
2848 data->fail_callback(ctdb, destnode, res, outdata,
2849 data->callback_data);
2852 if ((ret == 0) && (data->callback != NULL)) {
2853 data->callback(ctdb, destnode, res, outdata,
2854 data->callback_data);
2859 void ctdb_client_async_add(struct client_async_data *data, struct ctdb_client_control_state *state)
2861 /* set up the callback functions */
2862 state->async.fn = async_callback;
2863 state->async.private_data = data;
2865 /* one more control to wait for to complete */
2870 /* wait for up to the maximum number of seconds allowed
2871 or until all nodes we expect a response from has replied
2873 int ctdb_client_async_wait(struct ctdb_context *ctdb, struct client_async_data *data)
2875 while (data->count > 0) {
2876 event_loop_once(ctdb->ev);
2878 if (data->fail_count != 0) {
2879 if (!data->dont_log_errors) {
2880 DEBUG(DEBUG_ERR,("Async wait failed - fail_count=%u\n",
2890 perform a simple control on the listed nodes
2891 The control cannot return data
2893 int ctdb_client_async_control(struct ctdb_context *ctdb,
2894 enum ctdb_controls opcode,
2897 struct timeval timeout,
2898 bool dont_log_errors,
2900 client_async_callback client_callback,
2901 client_async_callback fail_callback,
2902 void *callback_data)
2904 struct client_async_data *async_data;
2905 struct ctdb_client_control_state *state;
2908 async_data = talloc_zero(ctdb, struct client_async_data);
2909 CTDB_NO_MEMORY_FATAL(ctdb, async_data);
2910 async_data->dont_log_errors = dont_log_errors;
2911 async_data->callback = client_callback;
2912 async_data->fail_callback = fail_callback;
2913 async_data->callback_data = callback_data;
2914 async_data->opcode = opcode;
2916 num_nodes = talloc_get_size(nodes) / sizeof(uint32_t);
2918 /* loop over all nodes and send an async control to each of them */
2919 for (j=0; j<num_nodes; j++) {
2920 uint32_t pnn = nodes[j];
2922 state = ctdb_control_send(ctdb, pnn, srvid, opcode,
2923 0, data, async_data, &timeout, NULL);
2924 if (state == NULL) {
2925 DEBUG(DEBUG_ERR,(__location__ " Failed to call async control %u\n", (unsigned)opcode));
2926 talloc_free(async_data);
2930 ctdb_client_async_add(async_data, state);
2933 if (ctdb_client_async_wait(ctdb, async_data) != 0) {
2934 talloc_free(async_data);
2938 talloc_free(async_data);
2942 uint32_t *list_of_vnnmap_nodes(struct ctdb_context *ctdb,
2943 struct ctdb_vnn_map *vnn_map,
2944 TALLOC_CTX *mem_ctx,
2947 int i, j, num_nodes;
2950 for (i=num_nodes=0;i<vnn_map->size;i++) {
2951 if (vnn_map->map[i] == ctdb->pnn && !include_self) {
2957 nodes = talloc_array(mem_ctx, uint32_t, num_nodes);
2958 CTDB_NO_MEMORY_FATAL(ctdb, nodes);
2960 for (i=j=0;i<vnn_map->size;i++) {
2961 if (vnn_map->map[i] == ctdb->pnn && !include_self) {
2964 nodes[j++] = vnn_map->map[i];
2970 uint32_t *list_of_active_nodes(struct ctdb_context *ctdb,
2971 struct ctdb_node_map *node_map,
2972 TALLOC_CTX *mem_ctx,
2975 int i, j, num_nodes;
2978 for (i=num_nodes=0;i<node_map->num;i++) {
2979 if (node_map->nodes[i].flags & NODE_FLAGS_INACTIVE) {
2982 if (node_map->nodes[i].pnn == ctdb->pnn && !include_self) {
2988 nodes = talloc_array(mem_ctx, uint32_t, num_nodes);
2989 CTDB_NO_MEMORY_FATAL(ctdb, nodes);
2991 for (i=j=0;i<node_map->num;i++) {
2992 if (node_map->nodes[i].flags & NODE_FLAGS_INACTIVE) {
2995 if (node_map->nodes[i].pnn == ctdb->pnn && !include_self) {
2998 nodes[j++] = node_map->nodes[i].pnn;
3004 uint32_t *list_of_active_nodes_except_pnn(struct ctdb_context *ctdb,
3005 struct ctdb_node_map *node_map,
3006 TALLOC_CTX *mem_ctx,
3009 int i, j, num_nodes;
3012 for (i=num_nodes=0;i<node_map->num;i++) {
3013 if (node_map->nodes[i].flags & NODE_FLAGS_INACTIVE) {
3016 if (node_map->nodes[i].pnn == pnn) {
3022 nodes = talloc_array(mem_ctx, uint32_t, num_nodes);
3023 CTDB_NO_MEMORY_FATAL(ctdb, nodes);
3025 for (i=j=0;i<node_map->num;i++) {
3026 if (node_map->nodes[i].flags & NODE_FLAGS_INACTIVE) {
3029 if (node_map->nodes[i].pnn == pnn) {
3032 nodes[j++] = node_map->nodes[i].pnn;
3038 uint32_t *list_of_connected_nodes(struct ctdb_context *ctdb,
3039 struct ctdb_node_map *node_map,
3040 TALLOC_CTX *mem_ctx,
3043 int i, j, num_nodes;
3046 for (i=num_nodes=0;i<node_map->num;i++) {
3047 if (node_map->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
3050 if (node_map->nodes[i].pnn == ctdb->pnn && !include_self) {
3056 nodes = talloc_array(mem_ctx, uint32_t, num_nodes);
3057 CTDB_NO_MEMORY_FATAL(ctdb, nodes);
3059 for (i=j=0;i<node_map->num;i++) {
3060 if (node_map->nodes[i].flags & NODE_FLAGS_DISCONNECTED) {
3063 if (node_map->nodes[i].pnn == ctdb->pnn && !include_self) {
3066 nodes[j++] = node_map->nodes[i].pnn;
3073 this is used to test if a pnn lock exists and if it exists will return
3074 the number of connections that pnn has reported or -1 if that recovery
3075 daemon is not running.
3078 ctdb_read_pnn_lock(int fd, int32_t pnn)
3083 lock.l_type = F_WRLCK;
3084 lock.l_whence = SEEK_SET;
3089 if (fcntl(fd, F_GETLK, &lock) != 0) {
3090 DEBUG(DEBUG_ERR, (__location__ " F_GETLK failed with %s\n", strerror(errno)));
3094 if (lock.l_type == F_UNLCK) {
3098 if (pread(fd, &c, 1, pnn) == -1) {
3099 DEBUG(DEBUG_CRIT,(__location__ " failed read pnn count - %s\n", strerror(errno)));
3107 get capabilities of a remote node
3109 struct ctdb_client_control_state *
3110 ctdb_ctrl_getcapabilities_send(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct timeval timeout, uint32_t destnode)
3112 return ctdb_control_send(ctdb, destnode, 0,
3113 CTDB_CONTROL_GET_CAPABILITIES, 0, tdb_null,
3114 mem_ctx, &timeout, NULL);
3117 int ctdb_ctrl_getcapabilities_recv(struct ctdb_context *ctdb, TALLOC_CTX *mem_ctx, struct ctdb_client_control_state *state, uint32_t *capabilities)
3123 ret = ctdb_control_recv(ctdb, state, mem_ctx, &outdata, &res, NULL);
3124 if ( (ret != 0) || (res != 0) ) {
3125 DEBUG(DEBUG_ERR,(__location__ " ctdb_ctrl_getcapabilities_recv failed\n"));
3130 *capabilities = *((uint32_t *)outdata.dptr);
3136 int ctdb_ctrl_getcapabilities(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *capabilities)
3138 struct ctdb_client_control_state *state;
3139 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
3142 state = ctdb_ctrl_getcapabilities_send(ctdb, tmp_ctx, timeout, destnode);
3143 ret = ctdb_ctrl_getcapabilities_recv(ctdb, tmp_ctx, state, capabilities);
3144 talloc_free(tmp_ctx);
3149 * check whether a transaction is active on a given db on a given node
3151 int32_t ctdb_ctrl_transaction_active(struct ctdb_context *ctdb,
3159 indata.dptr = (uint8_t *)&db_id;
3160 indata.dsize = sizeof(db_id);
3162 ret = ctdb_control(ctdb, destnode, 0,
3163 CTDB_CONTROL_TRANS2_ACTIVE,
3164 0, indata, NULL, NULL, &status,
3168 DEBUG(DEBUG_ERR, (__location__ " ctdb control for transaction_active failed\n"));
3176 struct ctdb_transaction_handle {
3177 struct ctdb_db_context *ctdb_db;
3180 * we store the reads and writes done under a transaction:
3181 * - one list stores both reads and writes (m_all),
3182 * - the other just writes (m_write)
3184 struct ctdb_marshall_buffer *m_all;
3185 struct ctdb_marshall_buffer *m_write;
3188 /* start a transaction on a database */
3189 static int ctdb_transaction_destructor(struct ctdb_transaction_handle *h)
3191 tdb_transaction_cancel(h->ctdb_db->ltdb->tdb);
3195 /* start a transaction on a database */
3196 static int ctdb_transaction_fetch_start(struct ctdb_transaction_handle *h)
3198 struct ctdb_record_handle *rh;
3201 struct ctdb_ltdb_header header;
3202 TALLOC_CTX *tmp_ctx;
3203 const char *keyname = CTDB_TRANSACTION_LOCK_KEY;
3205 struct ctdb_db_context *ctdb_db = h->ctdb_db;
3209 key.dptr = discard_const(keyname);
3210 key.dsize = strlen(keyname);
3212 if (!ctdb_db->persistent) {
3213 DEBUG(DEBUG_ERR,(__location__ " Attempted transaction on non-persistent database\n"));
3218 tmp_ctx = talloc_new(h);
3220 rh = ctdb_fetch_lock(ctdb_db, tmp_ctx, key, NULL);
3222 DEBUG(DEBUG_ERR,(__location__ " Failed to fetch_lock database\n"));
3223 talloc_free(tmp_ctx);
3227 status = ctdb_ctrl_transaction_active(ctdb_db->ctdb,
3231 unsigned long int usec = (1000 + random()) % 100000;
3232 DEBUG(DEBUG_NOTICE, (__location__ " transaction is active "
3233 "on db_id[0x%08x]. waiting for %lu "
3235 ctdb_db->db_id, usec));
3236 talloc_free(tmp_ctx);
3242 * store the pid in the database:
3243 * it is not enough that the node is dmaster...
3246 data.dptr = (unsigned char *)&pid;
3247 data.dsize = sizeof(pid_t);
3249 rh->header.dmaster = ctdb_db->ctdb->pnn;
3250 ret = ctdb_ltdb_store(ctdb_db, key, &(rh->header), data);
3252 DEBUG(DEBUG_ERR, (__location__ " Failed to store pid in "
3253 "transaction record\n"));
3254 talloc_free(tmp_ctx);
3260 ret = tdb_transaction_start(ctdb_db->ltdb->tdb);
3262 DEBUG(DEBUG_ERR,(__location__ " Failed to start tdb transaction\n"));
3263 talloc_free(tmp_ctx);
3267 ret = ctdb_ltdb_fetch(ctdb_db, key, &header, tmp_ctx, &data);
3269 DEBUG(DEBUG_ERR,(__location__ " Failed to re-fetch transaction "
3270 "lock record inside transaction\n"));
3271 tdb_transaction_cancel(ctdb_db->ltdb->tdb);
3272 talloc_free(tmp_ctx);
3276 if (header.dmaster != ctdb_db->ctdb->pnn) {
3277 DEBUG(DEBUG_DEBUG,(__location__ " not dmaster any more on "
3278 "transaction lock record\n"));
3279 tdb_transaction_cancel(ctdb_db->ltdb->tdb);
3280 talloc_free(tmp_ctx);
3284 if ((data.dsize != sizeof(pid_t)) || (*(pid_t *)(data.dptr) != pid)) {
3285 DEBUG(DEBUG_DEBUG, (__location__ " my pid is not stored in "
3286 "the transaction lock record\n"));
3287 tdb_transaction_cancel(ctdb_db->ltdb->tdb);
3288 talloc_free(tmp_ctx);
3292 talloc_free(tmp_ctx);
3298 /* start a transaction on a database */
3299 struct ctdb_transaction_handle *ctdb_transaction_start(struct ctdb_db_context *ctdb_db,
3300 TALLOC_CTX *mem_ctx)
3302 struct ctdb_transaction_handle *h;
3305 h = talloc_zero(mem_ctx, struct ctdb_transaction_handle);
3307 DEBUG(DEBUG_ERR,(__location__ " oom for transaction handle\n"));
3311 h->ctdb_db = ctdb_db;
3313 ret = ctdb_transaction_fetch_start(h);
3319 talloc_set_destructor(h, ctdb_transaction_destructor);
3327 fetch a record inside a transaction
3329 int ctdb_transaction_fetch(struct ctdb_transaction_handle *h,
3330 TALLOC_CTX *mem_ctx,
3331 TDB_DATA key, TDB_DATA *data)
3333 struct ctdb_ltdb_header header;
3336 ZERO_STRUCT(header);
3338 ret = ctdb_ltdb_fetch(h->ctdb_db, key, &header, mem_ctx, data);
3339 if (ret == -1 && header.dmaster == (uint32_t)-1) {
3340 /* record doesn't exist yet */
3349 if (!h->in_replay) {
3350 h->m_all = ctdb_marshall_add(h, h->m_all, h->ctdb_db->db_id, 1, key, NULL, *data);
3351 if (h->m_all == NULL) {
3352 DEBUG(DEBUG_ERR,(__location__ " Failed to add to marshalling record\n"));
3361 stores a record inside a transaction
3363 int ctdb_transaction_store(struct ctdb_transaction_handle *h,
3364 TDB_DATA key, TDB_DATA data)
3366 TALLOC_CTX *tmp_ctx = talloc_new(h);
3367 struct ctdb_ltdb_header header;
3371 ZERO_STRUCT(header);
3373 /* we need the header so we can update the RSN */
3374 ret = ctdb_ltdb_fetch(h->ctdb_db, key, &header, tmp_ctx, &olddata);
3375 if (ret == -1 && header.dmaster == (uint32_t)-1) {
3376 /* the record doesn't exist - create one with us as dmaster.
3377 This is only safe because we are in a transaction and this
3378 is a persistent database */
3379 ZERO_STRUCT(header);
3380 } else if (ret != 0) {
3381 DEBUG(DEBUG_ERR,(__location__ " Failed to fetch record\n"));
3382 talloc_free(tmp_ctx);
3386 if (data.dsize == olddata.dsize &&
3387 memcmp(data.dptr, olddata.dptr, data.dsize) == 0) {
3388 /* save writing the same data */
3389 talloc_free(tmp_ctx);
3393 header.dmaster = h->ctdb_db->ctdb->pnn;
3396 if (!h->in_replay) {
3397 h->m_all = ctdb_marshall_add(h, h->m_all, h->ctdb_db->db_id, 0, key, NULL, data);
3398 if (h->m_all == NULL) {
3399 DEBUG(DEBUG_ERR,(__location__ " Failed to add to marshalling record\n"));
3400 talloc_free(tmp_ctx);
3405 h->m_write = ctdb_marshall_add(h, h->m_write, h->ctdb_db->db_id, 0, key, &header, data);
3406 if (h->m_write == NULL) {
3407 DEBUG(DEBUG_ERR,(__location__ " Failed to add to marshalling record\n"));
3408 talloc_free(tmp_ctx);
3412 ret = ctdb_ltdb_store(h->ctdb_db, key, &header, data);
3414 talloc_free(tmp_ctx);
3420 replay a transaction
3422 static int ctdb_replay_transaction(struct ctdb_transaction_handle *h)
3425 struct ctdb_rec_data *rec = NULL;
3427 h->in_replay = true;
3428 talloc_free(h->m_write);
3431 ret = ctdb_transaction_fetch_start(h);
3436 for (i=0;i<h->m_all->count;i++) {
3439 rec = ctdb_marshall_loop_next(h->m_all, rec, NULL, NULL, &key, &data);
3441 DEBUG(DEBUG_ERR, (__location__ " Out of records in ctdb_replay_transaction?\n"));
3445 if (rec->reqid == 0) {
3447 if (ctdb_transaction_store(h, key, data) != 0) {
3452 TALLOC_CTX *tmp_ctx = talloc_new(h);
3454 if (ctdb_transaction_fetch(h, tmp_ctx, key, &data2) != 0) {
3455 talloc_free(tmp_ctx);
3458 if (data2.dsize != data.dsize ||
3459 memcmp(data2.dptr, data.dptr, data.dsize) != 0) {
3460 /* the record has changed on us - we have to give up */
3461 talloc_free(tmp_ctx);
3464 talloc_free(tmp_ctx);
3471 tdb_transaction_cancel(h->ctdb_db->ltdb->tdb);
3477 commit a transaction
3479 int ctdb_transaction_commit(struct ctdb_transaction_handle *h)
3483 struct ctdb_context *ctdb = h->ctdb_db->ctdb;
3484 struct timeval timeout;
3485 enum ctdb_controls failure_control = CTDB_CONTROL_TRANS2_ERROR;
3487 talloc_set_destructor(h, NULL);
3489 /* our commit strategy is quite complex.
3491 - we first try to commit the changes to all other nodes
3493 - if that works, then we commit locally and we are done
3495 - if a commit on another node fails, then we need to cancel
3496 the transaction, then restart the transaction (thus
3497 opening a window of time for a pending recovery to
3498 complete), then replay the transaction, checking all the
3499 reads and writes (checking that reads give the same data,
3500 and writes succeed). Then we retry the transaction to the
3505 if (h->m_write == NULL) {
3506 /* no changes were made */
3507 tdb_transaction_cancel(h->ctdb_db->ltdb->tdb);
3512 /* tell ctdbd to commit to the other nodes */
3513 timeout = timeval_current_ofs(1, 0);
3514 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, h->ctdb_db->db_id,
3515 retries==0?CTDB_CONTROL_TRANS2_COMMIT:CTDB_CONTROL_TRANS2_COMMIT_RETRY, 0,
3516 ctdb_marshall_finish(h->m_write), NULL, NULL, &status,
3518 if (ret != 0 || status != 0) {
3519 tdb_transaction_cancel(h->ctdb_db->ltdb->tdb);
3520 DEBUG(DEBUG_WARNING, (__location__ " transaction commit%s failed"
3521 ", retrying after 1 second...\n",
3522 (retries==0)?"":"retry "));
3526 failure_control = CTDB_CONTROL_TRANS2_ERROR;
3528 /* work out what error code we will give if we
3529 have to fail the operation */
3530 switch ((enum ctdb_trans2_commit_error)status) {
3531 case CTDB_TRANS2_COMMIT_SUCCESS:
3532 case CTDB_TRANS2_COMMIT_SOMEFAIL:
3533 case CTDB_TRANS2_COMMIT_TIMEOUT:
3534 failure_control = CTDB_CONTROL_TRANS2_ERROR;
3536 case CTDB_TRANS2_COMMIT_ALLFAIL:
3537 failure_control = CTDB_CONTROL_TRANS2_FINISHED;
3542 if (++retries == 100) {
3543 DEBUG(DEBUG_ERR,(__location__ " Giving up transaction on db 0x%08x after %d retries failure_control=%u\n",
3544 h->ctdb_db->db_id, retries, (unsigned)failure_control));
3545 ctdb_control(ctdb, CTDB_CURRENT_NODE, h->ctdb_db->db_id,
3546 failure_control, CTDB_CTRL_FLAG_NOREPLY,
3547 tdb_null, NULL, NULL, NULL, NULL, NULL);
3552 if (ctdb_replay_transaction(h) != 0) {
3553 DEBUG(DEBUG_ERR, (__location__ " Failed to replay "
3554 "transaction on db 0x%08x, "
3555 "failure control =%u\n",
3557 (unsigned)failure_control));
3558 ctdb_control(ctdb, CTDB_CURRENT_NODE, h->ctdb_db->db_id,
3559 failure_control, CTDB_CTRL_FLAG_NOREPLY,
3560 tdb_null, NULL, NULL, NULL, NULL, NULL);
3566 failure_control = CTDB_CONTROL_TRANS2_ERROR;
3569 /* do the real commit locally */
3570 ret = tdb_transaction_commit(h->ctdb_db->ltdb->tdb);
3572 DEBUG(DEBUG_ERR, (__location__ " Failed to commit transaction "
3573 "on db id 0x%08x locally, "
3574 "failure_control=%u\n",
3576 (unsigned)failure_control));
3577 ctdb_control(ctdb, CTDB_CURRENT_NODE, h->ctdb_db->db_id,
3578 failure_control, CTDB_CTRL_FLAG_NOREPLY,
3579 tdb_null, NULL, NULL, NULL, NULL, NULL);
3584 /* tell ctdbd that we are finished with our local commit */
3585 ctdb_control(ctdb, CTDB_CURRENT_NODE, h->ctdb_db->db_id,
3586 CTDB_CONTROL_TRANS2_FINISHED, CTDB_CTRL_FLAG_NOREPLY,
3587 tdb_null, NULL, NULL, NULL, NULL, NULL);
3593 recovery daemon ping to main daemon
3595 int ctdb_ctrl_recd_ping(struct ctdb_context *ctdb)
3600 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, 0, CTDB_CONTROL_RECD_PING, 0, tdb_null,
3601 ctdb, NULL, &res, NULL, NULL);
3602 if (ret != 0 || res != 0) {
3603 DEBUG(DEBUG_ERR,("Failed to send recd ping\n"));
3610 /* when forking the main daemon and the child process needs to connect back
3611 * to the daemon as a client process, this function can be used to change
3612 * the ctdb context from daemon into client mode
3614 int switch_from_server_to_client(struct ctdb_context *ctdb)
3618 /* shutdown the transport */
3619 if (ctdb->methods) {
3620 ctdb->methods->shutdown(ctdb);
3623 /* get a new event context */
3624 talloc_free(ctdb->ev);
3625 ctdb->ev = event_context_init(ctdb);
3627 close(ctdb->daemon.sd);
3628 ctdb->daemon.sd = -1;
3630 /* the client does not need to be realtime */
3631 if (ctdb->do_setsched) {
3632 ctdb_restore_scheduler(ctdb);
3635 /* initialise ctdb */
3636 ret = ctdb_socket_connect(ctdb);
3638 DEBUG(DEBUG_ALERT, (__location__ " Failed to init ctdb client\n"));
3646 get the status of running the monitor eventscripts
3648 int ctdb_ctrl_getscriptstatus(struct ctdb_context *ctdb,
3649 struct timeval timeout, uint32_t destnode,
3650 TALLOC_CTX *mem_ctx,
3651 struct ctdb_scripts_wire **script_status)
3657 ret = ctdb_control(ctdb, destnode, 0,
3658 CTDB_CONTROL_GET_EVENT_SCRIPT_STATUS, 0, tdb_null,
3659 mem_ctx, &outdata, &res, &timeout, NULL);
3660 if (ret != 0 || res != 0 || outdata.dsize == 0) {
3661 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for getscriptstatus failed ret:%d res:%d\n", ret, res));
3665 *script_status = (struct ctdb_scripts_wire *)talloc_memdup(mem_ctx, outdata.dptr, outdata.dsize);
3666 talloc_free(outdata.dptr);
3672 tell the main daemon how long it took to lock the reclock file
3674 int ctdb_ctrl_report_recd_lock_latency(struct ctdb_context *ctdb, struct timeval timeout, double latency)
3680 data.dptr = (uint8_t *)&latency;
3681 data.dsize = sizeof(latency);
3683 ret = ctdb_control(ctdb, CTDB_CURRENT_NODE, 0, CTDB_CONTROL_RECD_RECLOCK_LATENCY, 0, data,
3684 ctdb, NULL, &res, NULL, NULL);
3685 if (ret != 0 || res != 0) {
3686 DEBUG(DEBUG_ERR,("Failed to send recd reclock latency\n"));
3694 get the name of the reclock file
3696 int ctdb_ctrl_getreclock(struct ctdb_context *ctdb, struct timeval timeout,
3697 uint32_t destnode, TALLOC_CTX *mem_ctx,
3704 ret = ctdb_control(ctdb, destnode, 0,
3705 CTDB_CONTROL_GET_RECLOCK_FILE, 0, tdb_null,
3706 mem_ctx, &data, &res, &timeout, NULL);
3707 if (ret != 0 || res != 0) {
3711 if (data.dsize == 0) {
3714 *name = talloc_strdup(mem_ctx, discard_const(data.dptr));
3716 talloc_free(data.dptr);
3722 set the reclock filename for a node
3724 int ctdb_ctrl_setreclock(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, const char *reclock)
3730 if (reclock == NULL) {
3734 data.dsize = strlen(reclock) + 1;
3735 data.dptr = discard_const(reclock);
3738 ret = ctdb_control(ctdb, destnode, 0,
3739 CTDB_CONTROL_SET_RECLOCK_FILE, 0, data,
3740 NULL, NULL, &res, &timeout, NULL);
3741 if (ret != 0 || res != 0) {
3742 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setreclock failed\n"));
3752 int ctdb_ctrl_stop_node(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
3757 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_STOP_NODE, 0, tdb_null,
3758 ctdb, NULL, &res, &timeout, NULL);
3759 if (ret != 0 || res != 0) {
3760 DEBUG(DEBUG_ERR,("Failed to stop node\n"));
3770 int ctdb_ctrl_continue_node(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode)
3774 ret = ctdb_control(ctdb, destnode, 0, CTDB_CONTROL_CONTINUE_NODE, 0, tdb_null,
3775 ctdb, NULL, NULL, &timeout, NULL);
3777 DEBUG(DEBUG_ERR,("Failed to continue node\n"));
3785 set the natgw state for a node
3787 int ctdb_ctrl_setnatgwstate(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t natgwstate)
3793 data.dsize = sizeof(natgwstate);
3794 data.dptr = (uint8_t *)&natgwstate;
3796 ret = ctdb_control(ctdb, destnode, 0,
3797 CTDB_CONTROL_SET_NATGWSTATE, 0, data,
3798 NULL, NULL, &res, &timeout, NULL);
3799 if (ret != 0 || res != 0) {
3800 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setnatgwstate failed\n"));
3808 set the lmaster role for a node
3810 int ctdb_ctrl_setlmasterrole(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t lmasterrole)
3816 data.dsize = sizeof(lmasterrole);
3817 data.dptr = (uint8_t *)&lmasterrole;
3819 ret = ctdb_control(ctdb, destnode, 0,
3820 CTDB_CONTROL_SET_LMASTERROLE, 0, data,
3821 NULL, NULL, &res, &timeout, NULL);
3822 if (ret != 0 || res != 0) {
3823 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setlmasterrole failed\n"));
3831 set the recmaster role for a node
3833 int ctdb_ctrl_setrecmasterrole(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmasterrole)
3839 data.dsize = sizeof(recmasterrole);
3840 data.dptr = (uint8_t *)&recmasterrole;
3842 ret = ctdb_control(ctdb, destnode, 0,
3843 CTDB_CONTROL_SET_RECMASTERROLE, 0, data,
3844 NULL, NULL, &res, &timeout, NULL);
3845 if (ret != 0 || res != 0) {
3846 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for setrecmasterrole failed\n"));
3853 /* enable an eventscript
3855 int ctdb_ctrl_enablescript(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, const char *script)
3861 data.dsize = strlen(script) + 1;
3862 data.dptr = discard_const(script);
3864 ret = ctdb_control(ctdb, destnode, 0,
3865 CTDB_CONTROL_ENABLE_SCRIPT, 0, data,
3866 NULL, NULL, &res, &timeout, NULL);
3867 if (ret != 0 || res != 0) {
3868 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for enablescript failed\n"));
3875 /* disable an eventscript
3877 int ctdb_ctrl_disablescript(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, const char *script)
3883 data.dsize = strlen(script) + 1;
3884 data.dptr = discard_const(script);
3886 ret = ctdb_control(ctdb, destnode, 0,
3887 CTDB_CONTROL_DISABLE_SCRIPT, 0, data,
3888 NULL, NULL, &res, &timeout, NULL);
3889 if (ret != 0 || res != 0) {
3890 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for disablescript failed\n"));
3898 int ctdb_ctrl_set_ban(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, struct ctdb_ban_time *bantime)
3904 data.dsize = sizeof(*bantime);
3905 data.dptr = (uint8_t *)bantime;
3907 ret = ctdb_control(ctdb, destnode, 0,
3908 CTDB_CONTROL_SET_BAN_STATE, 0, data,
3909 NULL, NULL, &res, &timeout, NULL);
3910 if (ret != 0 || res != 0) {
3911 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for set ban state failed\n"));
3919 int ctdb_ctrl_get_ban(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, struct ctdb_ban_time **bantime)
3924 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
3926 ret = ctdb_control(ctdb, destnode, 0,
3927 CTDB_CONTROL_GET_BAN_STATE, 0, tdb_null,
3928 tmp_ctx, &outdata, &res, &timeout, NULL);
3929 if (ret != 0 || res != 0) {
3930 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for set ban state failed\n"));
3931 talloc_free(tmp_ctx);
3935 *bantime = (struct ctdb_ban_time *)talloc_steal(mem_ctx, outdata.dptr);
3936 talloc_free(tmp_ctx);
3942 int ctdb_ctrl_set_db_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, struct ctdb_db_priority *db_prio)
3947 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
3949 data.dptr = (uint8_t*)db_prio;
3950 data.dsize = sizeof(*db_prio);
3952 ret = ctdb_control(ctdb, destnode, 0,
3953 CTDB_CONTROL_SET_DB_PRIORITY, 0, data,
3954 tmp_ctx, NULL, &res, &timeout, NULL);
3955 if (ret != 0 || res != 0) {
3956 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for set_db_priority failed\n"));
3957 talloc_free(tmp_ctx);
3961 talloc_free(tmp_ctx);
3966 int ctdb_ctrl_get_db_priority(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t db_id, uint32_t *priority)
3971 TALLOC_CTX *tmp_ctx = talloc_new(NULL);
3973 data.dptr = (uint8_t*)&db_id;
3974 data.dsize = sizeof(db_id);
3976 ret = ctdb_control(ctdb, destnode, 0,
3977 CTDB_CONTROL_GET_DB_PRIORITY, 0, data,
3978 tmp_ctx, NULL, &res, &timeout, NULL);
3979 if (ret != 0 || res < 0) {
3980 DEBUG(DEBUG_ERR,(__location__ " ctdb_control for set_db_priority failed\n"));
3981 talloc_free(tmp_ctx);
3989 talloc_free(tmp_ctx);