2 Unix SMB/CIFS implementation.
3 Samba internal messaging functions
4 Copyright (C) 2007 by Volker Lendecke
5 Copyright (C) 2007 by Andrew Tridgell
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 #ifdef CLUSTER_SUPPORT
25 #include "librpc/gen_ndr/messaging.h"
26 #include "librpc/gen_ndr/ndr_messaging.h"
28 /* paths to these include files come from --with-ctdb= in configure */
30 #include "ctdb_private.h"
32 struct ctdbd_connection {
33 struct messaging_context *msg_ctx;
37 struct packet_context *pkt;
40 void (*release_ip_handler)(const char *ip_addr, void *private_data);
41 void *release_ip_priv;
44 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
45 uint32_t vnn, uint32 opcode,
46 uint64_t srvid, uint32_t flags, TDB_DATA data,
47 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
51 * exit on fatal communications errors with the ctdbd daemon
53 static void cluster_fatal(const char *why)
55 DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
56 /* we don't use smb_panic() as we don't want to delay to write
57 a core file. We need to release this process id immediately
58 so that someone else can take over without getting sharing
66 static void ctdb_packet_dump(struct ctdb_req_header *hdr)
68 if (DEBUGLEVEL < 10) {
71 DEBUGADD(10, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
72 (int)hdr->length, (int)hdr->ctdb_magic,
73 (int)hdr->ctdb_version, (int)hdr->generation,
74 (int)hdr->operation, (int)hdr->reqid));
78 * Register a srvid with ctdbd
80 static NTSTATUS register_with_ctdbd(struct ctdbd_connection *conn,
85 return ctdbd_control(conn, CTDB_CURRENT_NODE,
86 CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
87 tdb_null, NULL, NULL, &cstatus);
91 * get our vnn from the cluster
93 static NTSTATUS get_cluster_vnn(struct ctdbd_connection *conn, uint32 *vnn)
97 status = ctdbd_control(conn,
98 CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
99 tdb_null, NULL, NULL, &cstatus);
100 if (!NT_STATUS_IS_OK(status)) {
101 cluster_fatal("ctdbd_control failed\n");
103 *vnn = (uint32_t)cstatus;
107 uint32 ctdbd_vnn(const struct ctdbd_connection *conn)
109 return conn->our_vnn;
113 * Get us a ctdb connection
116 static NTSTATUS ctdbd_connect(TALLOC_CTX *mem_ctx,
117 struct packet_context **presult)
119 struct packet_context *result;
120 const char *sockname = lp_ctdbd_socket();
121 struct sockaddr_un addr;
124 if (!sockname || !*sockname) {
125 sockname = CTDB_PATH;
128 fd = socket(AF_UNIX, SOCK_STREAM, 0);
130 DEBUG(3, ("Could not create socket: %s\n", strerror(errno)));
131 return map_nt_error_from_unix(errno);
135 addr.sun_family = AF_UNIX;
136 strncpy(addr.sun_path, sockname, sizeof(addr.sun_path));
138 if (sys_connect(fd, (struct sockaddr *)&addr) == -1) {
139 DEBUG(1, ("connect(%s) failed: %s\n", sockname,
142 return map_nt_error_from_unix(errno);
145 if (!(result = packet_init(mem_ctx, fd))) {
147 return NT_STATUS_NO_MEMORY;
155 * Do we have a complete ctdb packet in the queue?
158 static bool ctdb_req_complete(const uint8_t *buf, size_t available,
164 if (available < sizeof(msglen)) {
168 msglen = *((uint32 *)buf);
170 DEBUG(10, ("msglen = %d\n", msglen));
172 if (msglen < sizeof(struct ctdb_req_header)) {
173 DEBUG(0, ("Got invalid msglen: %d, expected at least %d for "
174 "the req_header\n", (int)msglen,
175 (int)sizeof(struct ctdb_req_header)));
176 cluster_fatal("ctdbd protocol error\n");
179 if (available < msglen) {
188 * State necessary to defer an incoming message while we are waiting for a
192 struct deferred_msg_state {
193 struct messaging_context *msg_ctx;
194 struct messaging_rec *rec;
198 * Timed event handler for the deferred message
201 static void deferred_message_dispatch(struct event_context *event_ctx,
202 struct timed_event *te,
206 struct deferred_msg_state *state = talloc_get_type_abort(
207 private_data, struct deferred_msg_state);
209 messaging_dispatch_rec(state->msg_ctx, state->rec);
214 struct req_pull_state {
220 * Pull a ctdb request out of the incoming packet queue
223 static NTSTATUS ctdb_req_pull(uint8_t *buf, size_t length,
226 struct req_pull_state *state = (struct req_pull_state *)private_data;
228 state->req.data = talloc_move(state->mem_ctx, &buf);
229 state->req.length = length;
234 * Fetch a messaging_rec from an incoming ctdb style message
237 static struct messaging_rec *ctdb_pull_messaging_rec(TALLOC_CTX *mem_ctx,
238 size_t overall_length,
239 struct ctdb_req_message *msg)
241 struct messaging_rec *result;
243 enum ndr_err_code ndr_err;
245 if ((overall_length < offsetof(struct ctdb_req_message, data))
247 < offsetof(struct ctdb_req_message, data) + msg->datalen)) {
249 cluster_fatal("got invalid msg length");
252 if (!(result = TALLOC_P(mem_ctx, struct messaging_rec))) {
253 DEBUG(0, ("talloc failed\n"));
257 blob = data_blob_const(msg->data, msg->datalen);
259 ndr_err = ndr_pull_struct_blob(
260 &blob, result, NULL, result,
261 (ndr_pull_flags_fn_t)ndr_pull_messaging_rec);
263 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
264 DEBUG(0, ("ndr_pull_struct_blob failed: %s\n",
265 ndr_errstr(ndr_err)));
270 if (DEBUGLEVEL >= 10) {
271 DEBUG(10, ("ctdb_pull_messaging_rec:\n"));
272 NDR_PRINT_DEBUG(messaging_rec, result);
278 static NTSTATUS ctdb_packet_fd_read_sync(struct packet_context *ctx)
280 struct timeval timeout;
281 struct timeval *ptimeout;
283 timeout = timeval_set(lp_ctdb_timeout(), 0);
284 ptimeout = (timeout.tv_sec != 0) ? &timeout : NULL;
286 return packet_fd_read_sync(ctx, ptimeout);
290 * Read a full ctdbd request. If we have a messaging context, defer incoming
291 * messages that might come in between.
294 static NTSTATUS ctdb_read_req(struct ctdbd_connection *conn, uint32 reqid,
295 TALLOC_CTX *mem_ctx, void *result)
297 struct ctdb_req_header *hdr;
298 struct req_pull_state state;
303 status = ctdb_packet_fd_read_sync(conn->pkt);
305 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_BUSY)) {
308 } else if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
313 if (!NT_STATUS_IS_OK(status)) {
314 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
315 cluster_fatal("ctdbd died\n");
321 state.mem_ctx = mem_ctx;
323 if (!packet_handler(conn->pkt, ctdb_req_complete, ctdb_req_pull,
328 DEBUG(10, ("not enough data from ctdb socket, retrying\n"));
332 if (!NT_STATUS_IS_OK(status)) {
333 DEBUG(0, ("Could not read packet: %s\n", nt_errstr(status)));
334 cluster_fatal("ctdbd died\n");
337 hdr = (struct ctdb_req_header *)state.req.data;
339 DEBUG(10, ("Received ctdb packet\n"));
340 ctdb_packet_dump(hdr);
342 if (hdr->operation == CTDB_REQ_MESSAGE) {
343 struct timed_event *evt;
344 struct deferred_msg_state *msg_state;
345 struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
347 if (conn->msg_ctx == NULL) {
348 DEBUG(1, ("Got a message without having a msg ctx, "
349 "dropping msg %llu\n",
350 (long long unsigned)msg->srvid));
354 if ((conn->release_ip_handler != NULL)
355 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
356 /* must be dispatched immediately */
357 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
358 conn->release_ip_handler((const char *)msg->data,
359 conn->release_ip_priv);
364 if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
365 DEBUG(0,("Got cluster reconfigure message in ctdb_read_req\n"));
366 messaging_send(conn->msg_ctx, procid_self(),
367 MSG_SMB_BRL_VALIDATE, &data_blob_null);
372 if (!(msg_state = TALLOC_P(NULL, struct deferred_msg_state))) {
373 DEBUG(0, ("talloc failed\n"));
378 if (!(msg_state->rec = ctdb_pull_messaging_rec(
379 msg_state, state.req.length, msg))) {
380 DEBUG(0, ("ctdbd_pull_messaging_rec failed\n"));
381 TALLOC_FREE(msg_state);
388 msg_state->msg_ctx = conn->msg_ctx;
391 * We're waiting for a call reply, but an async message has
392 * crossed. Defer dispatching to the toplevel event loop.
394 evt = event_add_timed(conn->msg_ctx->event_ctx,
395 conn->msg_ctx->event_ctx,
397 deferred_message_dispatch,
400 DEBUG(0, ("event_add_timed failed\n"));
401 TALLOC_FREE(msg_state);
409 if (hdr->reqid != reqid) {
410 /* we got the wrong reply */
411 DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
412 "been %u\n", hdr->reqid, reqid));
417 *((void **)result) = talloc_move(mem_ctx, &hdr);
423 * Get us a ctdbd connection
426 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
427 struct ctdbd_connection **pconn)
429 struct ctdbd_connection *conn;
432 if (!(conn = TALLOC_ZERO_P(mem_ctx, struct ctdbd_connection))) {
433 DEBUG(0, ("talloc failed\n"));
434 return NT_STATUS_NO_MEMORY;
437 status = ctdbd_connect(conn, &conn->pkt);
439 if (!NT_STATUS_IS_OK(status)) {
440 DEBUG(10, ("ctdbd_connect failed: %s\n", nt_errstr(status)));
444 status = get_cluster_vnn(conn, &conn->our_vnn);
446 if (!NT_STATUS_IS_OK(status)) {
447 DEBUG(10, ("get_cluster_vnn failed: %s\n", nt_errstr(status)));
451 generate_random_buffer((unsigned char *)&conn->rand_srvid,
452 sizeof(conn->rand_srvid));
454 status = register_with_ctdbd(conn, conn->rand_srvid);
456 if (!NT_STATUS_IS_OK(status)) {
457 DEBUG(5, ("Could not register random srvid: %s\n",
471 * Get us a ctdbd connection and register us as a process
474 NTSTATUS ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
475 struct ctdbd_connection **pconn)
477 struct ctdbd_connection *conn;
480 status = ctdbd_init_connection(mem_ctx, &conn);
482 if (!NT_STATUS_IS_OK(status)) {
486 status = register_with_ctdbd(conn, (uint64_t)sys_getpid());
487 if (!NT_STATUS_IS_OK(status)) {
491 status = register_with_ctdbd(conn, MSG_SRVID_SAMBA);
492 if (!NT_STATUS_IS_OK(status)) {
505 * Packet handler to receive and handle a ctdb message
507 static NTSTATUS ctdb_handle_message(uint8_t *buf, size_t length,
510 struct ctdbd_connection *conn = talloc_get_type_abort(
511 private_data, struct ctdbd_connection);
512 struct ctdb_req_message *msg;
513 struct messaging_rec *msg_rec;
515 msg = (struct ctdb_req_message *)buf;
517 if (msg->hdr.operation != CTDB_REQ_MESSAGE) {
518 DEBUG(0, ("Received async msg of type %u, discarding\n",
519 msg->hdr.operation));
521 return NT_STATUS_INVALID_PARAMETER;
524 if ((conn->release_ip_handler != NULL)
525 && (msg->srvid == CTDB_SRVID_RELEASE_IP)) {
526 /* must be dispatched immediately */
527 DEBUG(10, ("received CTDB_SRVID_RELEASE_IP\n"));
528 conn->release_ip_handler((const char *)msg->data,
529 conn->release_ip_priv);
534 SMB_ASSERT(conn->msg_ctx != NULL);
536 if (msg->srvid == CTDB_SRVID_RECONFIGURE) {
537 DEBUG(0,("Got cluster reconfigure message\n"));
539 * when the cluster is reconfigured, we need to clean the brl
542 messaging_send(conn->msg_ctx, procid_self(),
543 MSG_SMB_BRL_VALIDATE, &data_blob_null);
546 * it's possible that we have just rejoined the cluster after
547 * an outage. In that case our pending locks could have been
548 * removed from the lockdb, so retry them once more
550 message_send_all(conn->msg_ctx, MSG_SMB_UNLOCK, NULL, 0, NULL);
558 /* only messages to our pid or the broadcast are valid here */
559 if (msg->srvid != sys_getpid() && msg->srvid != MSG_SRVID_SAMBA) {
560 DEBUG(0,("Got unexpected message with srvid=%llu\n",
561 (unsigned long long)msg->srvid));
566 if (!(msg_rec = ctdb_pull_messaging_rec(NULL, length, msg))) {
567 DEBUG(10, ("ctdb_pull_messaging_rec failed\n"));
569 return NT_STATUS_NO_MEMORY;
572 messaging_dispatch_rec(conn->msg_ctx, msg_rec);
574 TALLOC_FREE(msg_rec);
580 * The ctdbd socket is readable asynchronuously
583 static void ctdbd_socket_handler(struct event_context *event_ctx,
584 struct fd_event *event,
588 struct ctdbd_connection *conn = talloc_get_type_abort(
589 private_data, struct ctdbd_connection);
593 status = packet_fd_read(conn->pkt);
595 if (!NT_STATUS_IS_OK(status)) {
596 DEBUG(0, ("packet_fd_read failed: %s\n", nt_errstr(status)));
597 cluster_fatal("ctdbd died\n");
600 while (packet_handler(conn->pkt, ctdb_req_complete,
601 ctdb_handle_message, conn, &status)) {
602 if (!NT_STATUS_IS_OK(status)) {
603 DEBUG(10, ("could not handle incoming message: %s\n",
610 * Prepare a ctdbd connection to receive messages
613 NTSTATUS ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
614 struct messaging_context *msg_ctx)
616 SMB_ASSERT(conn->msg_ctx == NULL);
617 SMB_ASSERT(conn->fde == NULL);
619 if (!(conn->fde = event_add_fd(msg_ctx->event_ctx, conn,
620 packet_get_fd(conn->pkt),
622 ctdbd_socket_handler,
624 DEBUG(0, ("event_add_fd failed\n"));
625 return NT_STATUS_NO_MEMORY;
628 conn->msg_ctx = msg_ctx;
634 * Send a messaging message across a ctdbd
637 NTSTATUS ctdbd_messaging_send(struct ctdbd_connection *conn,
638 uint32 dst_vnn, uint64 dst_srvid,
639 struct messaging_rec *msg)
641 struct ctdb_req_message r;
645 enum ndr_err_code ndr_err;
647 if (!(mem_ctx = talloc_init("ctdbd_messaging_send"))) {
648 DEBUG(0, ("talloc failed\n"));
649 return NT_STATUS_NO_MEMORY;
652 ndr_err = ndr_push_struct_blob(
653 &blob, mem_ctx, NULL, msg,
654 (ndr_push_flags_fn_t)ndr_push_messaging_rec);
656 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
657 DEBUG(0, ("ndr_push_struct_blob failed: %s\n",
658 ndr_errstr(ndr_err)));
659 status = ndr_map_error2ntstatus(ndr_err);
663 r.hdr.length = offsetof(struct ctdb_req_message, data) + blob.length;
664 r.hdr.ctdb_magic = CTDB_MAGIC;
665 r.hdr.ctdb_version = CTDB_VERSION;
666 r.hdr.generation = 1;
667 r.hdr.operation = CTDB_REQ_MESSAGE;
668 r.hdr.destnode = dst_vnn;
669 r.hdr.srcnode = conn->our_vnn;
672 r.datalen = blob.length;
674 DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
675 ctdb_packet_dump(&r.hdr);
677 status = packet_send(
679 data_blob_const(&r, offsetof(struct ctdb_req_message, data)),
682 if (!NT_STATUS_IS_OK(status)) {
683 DEBUG(0, ("packet_send failed: %s\n", nt_errstr(status)));
687 status = packet_flush(conn->pkt);
689 if (!NT_STATUS_IS_OK(status)) {
690 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
691 cluster_fatal("cluster dispatch daemon msg write error\n");
694 status = NT_STATUS_OK;
696 TALLOC_FREE(mem_ctx);
701 * send/recv a generic ctdb control message
703 static NTSTATUS ctdbd_control(struct ctdbd_connection *conn,
704 uint32_t vnn, uint32 opcode,
705 uint64_t srvid, uint32_t flags,
707 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
710 struct ctdb_req_control req;
711 struct ctdb_reply_control *reply = NULL;
712 struct ctdbd_connection *new_conn = NULL;
715 /* the samba3 ctdb code can't handle NOREPLY yet */
716 flags &= ~CTDB_CTRL_FLAG_NOREPLY;
719 status = ctdbd_init_connection(NULL, &new_conn);
721 if (!NT_STATUS_IS_OK(status)) {
722 DEBUG(10, ("Could not init temp connection: %s\n",
731 req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
732 req.hdr.ctdb_magic = CTDB_MAGIC;
733 req.hdr.ctdb_version = CTDB_VERSION;
734 req.hdr.operation = CTDB_REQ_CONTROL;
735 req.hdr.reqid = ++conn->reqid;
736 req.hdr.destnode = vnn;
739 req.datalen = data.dsize;
741 DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
742 ctdb_packet_dump(&req.hdr);
744 status = packet_send(
746 data_blob_const(&req, offsetof(struct ctdb_req_control, data)),
747 data_blob_const(data.dptr, data.dsize));
749 if (!NT_STATUS_IS_OK(status)) {
750 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
754 status = packet_flush(conn->pkt);
756 if (!NT_STATUS_IS_OK(status)) {
757 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
758 cluster_fatal("cluster dispatch daemon control write error\n");
761 if (flags & CTDB_CTRL_FLAG_NOREPLY) {
762 TALLOC_FREE(new_conn);
766 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
768 if (!NT_STATUS_IS_OK(status)) {
769 DEBUG(10, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
773 if (reply->hdr.operation != CTDB_REPLY_CONTROL) {
774 DEBUG(0, ("received invalid reply\n"));
779 if (!(outdata->dptr = (uint8 *)talloc_memdup(
780 mem_ctx, reply->data, reply->datalen))) {
782 return NT_STATUS_NO_MEMORY;
784 outdata->dsize = reply->datalen;
787 (*cstatus) = reply->status;
790 status = NT_STATUS_OK;
793 TALLOC_FREE(new_conn);
799 * see if a remote process exists
801 bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32 vnn, pid_t pid)
807 data.dptr = (uint8_t*)&pid;
808 data.dsize = sizeof(pid);
810 status = ctdbd_control(conn, vnn, CTDB_CONTROL_PROCESS_EXISTS, 0, 0,
811 data, NULL, NULL, &cstatus);
812 if (!NT_STATUS_IS_OK(status)) {
813 DEBUG(0, (__location__ " ctdb_control for process_exists "
824 char *ctdbd_dbpath(struct ctdbd_connection *conn,
825 TALLOC_CTX *mem_ctx, uint32_t db_id)
831 data.dptr = (uint8_t*)&db_id;
832 data.dsize = sizeof(db_id);
834 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
835 CTDB_CONTROL_GETDBPATH, 0, 0, data,
836 mem_ctx, &data, &cstatus);
837 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
838 DEBUG(0,(__location__ " ctdb_control for getdbpath failed\n"));
842 return (char *)data.dptr;
846 * attach to a ctdb database
848 NTSTATUS ctdbd_db_attach(struct ctdbd_connection *conn,
849 const char *name, uint32_t *db_id, int tdb_flags)
854 bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
856 data.dptr = (uint8_t*)name;
857 data.dsize = strlen(name)+1;
859 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
861 ? CTDB_CONTROL_DB_ATTACH_PERSISTENT
862 : CTDB_CONTROL_DB_ATTACH,
863 0, 0, data, NULL, &data, &cstatus);
864 if (!NT_STATUS_IS_OK(status)) {
865 DEBUG(0, (__location__ " ctdb_control for db_attach "
866 "failed: %s\n", nt_errstr(status)));
870 if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
871 DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
872 return NT_STATUS_INTERNAL_ERROR;
875 *db_id = *(uint32_t *)data.dptr;
876 talloc_free(data.dptr);
878 if (!(tdb_flags & TDB_SEQNUM)) {
882 data.dptr = (uint8_t *)db_id;
883 data.dsize = sizeof(*db_id);
885 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
886 CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
887 NULL, NULL, &cstatus);
888 if (!NT_STATUS_IS_OK(status) || cstatus != 0) {
889 DEBUG(0,(__location__ " ctdb_control for enable seqnum "
891 return NT_STATUS_IS_OK(status) ? NT_STATUS_INTERNAL_ERROR :
899 * force the migration of a record to this node
901 NTSTATUS ctdbd_migrate(struct ctdbd_connection *conn, uint32 db_id,
904 struct ctdb_req_call req;
905 struct ctdb_reply_call *reply;
910 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
911 req.hdr.ctdb_magic = CTDB_MAGIC;
912 req.hdr.ctdb_version = CTDB_VERSION;
913 req.hdr.operation = CTDB_REQ_CALL;
914 req.hdr.reqid = ++conn->reqid;
915 req.flags = CTDB_IMMEDIATE_MIGRATION;
916 req.callid = CTDB_NULL_FUNC;
918 req.keylen = key.dsize;
920 DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
921 ctdb_packet_dump(&req.hdr);
923 status = packet_send(
925 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
926 data_blob_const(key.dptr, key.dsize));
928 if (!NT_STATUS_IS_OK(status)) {
929 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
933 status = packet_flush(conn->pkt);
935 if (!NT_STATUS_IS_OK(status)) {
936 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
937 cluster_fatal("cluster dispatch daemon control write error\n");
940 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
942 if (!NT_STATUS_IS_OK(status)) {
943 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
947 if (reply->hdr.operation != CTDB_REPLY_CALL) {
948 DEBUG(0, ("received invalid reply\n"));
949 status = NT_STATUS_INTERNAL_ERROR;
953 status = NT_STATUS_OK;
961 * remotely fetch a record without locking it or forcing a migration
963 NTSTATUS ctdbd_fetch(struct ctdbd_connection *conn, uint32 db_id,
964 TDB_DATA key, TALLOC_CTX *mem_ctx, TDB_DATA *data)
966 struct ctdb_req_call req;
967 struct ctdb_reply_call *reply;
972 req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
973 req.hdr.ctdb_magic = CTDB_MAGIC;
974 req.hdr.ctdb_version = CTDB_VERSION;
975 req.hdr.operation = CTDB_REQ_CALL;
976 req.hdr.reqid = ++conn->reqid;
978 req.callid = CTDB_FETCH_FUNC;
980 req.keylen = key.dsize;
982 status = packet_send(
984 data_blob_const(&req, offsetof(struct ctdb_req_call, data)),
985 data_blob_const(key.dptr, key.dsize));
987 if (!NT_STATUS_IS_OK(status)) {
988 DEBUG(3, ("packet_send failed: %s\n", nt_errstr(status)));
992 status = packet_flush(conn->pkt);
994 if (!NT_STATUS_IS_OK(status)) {
995 DEBUG(3, ("write to ctdbd failed: %s\n", nt_errstr(status)));
996 cluster_fatal("cluster dispatch daemon control write error\n");
999 status = ctdb_read_req(conn, req.hdr.reqid, NULL, (void *)&reply);
1001 if (!NT_STATUS_IS_OK(status)) {
1002 DEBUG(0, ("ctdb_read_req failed: %s\n", nt_errstr(status)));
1006 if (reply->hdr.operation != CTDB_REPLY_CALL) {
1007 DEBUG(0, ("received invalid reply\n"));
1008 status = NT_STATUS_INTERNAL_ERROR;
1012 data->dsize = reply->datalen;
1013 if (data->dsize == 0) {
1018 data->dptr = (uint8 *)talloc_memdup(mem_ctx, &reply->data[0],
1020 if (data->dptr == NULL) {
1021 DEBUG(0, ("talloc failed\n"));
1022 status = NT_STATUS_NO_MEMORY;
1027 status = NT_STATUS_OK;
1033 struct ctdbd_traverse_state {
1034 void (*fn)(TDB_DATA key, TDB_DATA data, void *private_data);
1039 * Handle a traverse record coming in on the ctdbd connection
1042 static NTSTATUS ctdb_traverse_handler(uint8_t *buf, size_t length,
1045 struct ctdbd_traverse_state *state =
1046 (struct ctdbd_traverse_state *)private_data;
1048 struct ctdb_req_message *m;
1049 struct ctdb_rec_data *d;
1052 m = (struct ctdb_req_message *)buf;
1054 if (length < sizeof(*m) || m->hdr.length != length) {
1055 DEBUG(0, ("Got invalid message of length %d\n", (int)length));
1057 return NT_STATUS_UNEXPECTED_IO_ERROR;
1060 d = (struct ctdb_rec_data *)&m->data[0];
1061 if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
1062 DEBUG(0, ("Got invalid traverse data of length %d\n",
1065 return NT_STATUS_UNEXPECTED_IO_ERROR;
1068 key.dsize = d->keylen;
1069 key.dptr = &d->data[0];
1070 data.dsize = d->datalen;
1071 data.dptr = &d->data[d->keylen];
1073 if (key.dsize == 0 && data.dsize == 0) {
1074 /* end of traverse */
1075 return NT_STATUS_END_OF_FILE;
1078 if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
1079 DEBUG(0, ("Got invalid ltdb header length %d\n",
1082 return NT_STATUS_UNEXPECTED_IO_ERROR;
1084 data.dsize -= sizeof(struct ctdb_ltdb_header);
1085 data.dptr += sizeof(struct ctdb_ltdb_header);
1088 state->fn(key, data, state->private_data);
1092 return NT_STATUS_OK;
1096 Traverse a ctdb database. This uses a kind-of hackish way to open a second
1097 connection to ctdbd to avoid the hairy recursive and async problems with
1101 NTSTATUS ctdbd_traverse(uint32 db_id,
1102 void (*fn)(TDB_DATA key, TDB_DATA data,
1103 void *private_data),
1106 struct ctdbd_connection *conn;
1110 struct ctdb_traverse_start t;
1112 struct ctdbd_traverse_state state;
1114 status = ctdbd_init_connection(NULL, &conn);
1115 if (!NT_STATUS_IS_OK(status)) {
1116 DEBUG(0, ("ctdbd_init_connection failed: %s\n",
1117 nt_errstr(status)));
1122 t.srvid = conn->rand_srvid;
1123 t.reqid = ++conn->reqid;
1125 data.dptr = (uint8_t *)&t;
1126 data.dsize = sizeof(t);
1128 status = ctdbd_control(conn, CTDB_CURRENT_NODE,
1129 CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid, 0,
1130 data, NULL, NULL, &cstatus);
1132 if (!NT_STATUS_IS_OK(status) || (cstatus != 0)) {
1134 DEBUG(0,("ctdbd_control failed: %s, %d\n", nt_errstr(status),
1137 if (NT_STATUS_IS_OK(status)) {
1139 * We need a mapping here
1141 status = NT_STATUS_UNSUCCESSFUL;
1147 state.private_data = private_data;
1151 status = NT_STATUS_OK;
1153 if (packet_handler(conn->pkt, ctdb_req_complete,
1154 ctdb_traverse_handler, &state, &status)) {
1156 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1157 status = NT_STATUS_OK;
1162 * There might be more in the queue
1167 if (!NT_STATUS_IS_OK(status)) {
1171 status = ctdb_packet_fd_read_sync(conn->pkt);
1173 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1175 * There might be more in the queue
1180 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
1181 status = NT_STATUS_OK;
1185 if (!NT_STATUS_IS_OK(status)) {
1186 DEBUG(0, ("packet_fd_read_sync failed: %s\n", nt_errstr(status)));
1187 cluster_fatal("ctdbd died\n");
1197 This is used to canonicalize a ctdb_sock_addr structure.
1199 static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
1200 struct sockaddr_storage *out)
1202 memcpy(out, in, sizeof (*out));
1205 if (in->ss_family == AF_INET6) {
1206 const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
1207 const struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
1208 struct sockaddr_in *out4 = (struct sockaddr_in *)out;
1209 if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
1210 memset(out, 0, sizeof(*out));
1211 #ifdef HAVE_SOCK_SIN_LEN
1212 out4->sin_len = sizeof(*out);
1214 out4->sin_family = AF_INET;
1215 out4->sin_port = in6->sin6_port;
1216 memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr32[3], 4);
1223 * Register us as a server for a particular tcp connection
1226 NTSTATUS ctdbd_register_ips(struct ctdbd_connection *conn,
1227 const struct sockaddr_storage *_server,
1228 const struct sockaddr_storage *_client,
1229 void (*release_ip_handler)(const char *ip_addr,
1230 void *private_data),
1234 * we still use ctdb_control_tcp for ipv4
1235 * because we want to work against older ctdb
1236 * versions at runtime
1238 struct ctdb_control_tcp p4;
1239 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1240 struct ctdb_control_tcp_addr p;
1244 struct sockaddr_storage client;
1245 struct sockaddr_storage server;
1248 * Only one connection so far
1250 SMB_ASSERT(conn->release_ip_handler == NULL);
1252 smbd_ctdb_canonicalize_ip(_client, &client);
1253 smbd_ctdb_canonicalize_ip(_server, &server);
1255 switch (client.ss_family) {
1257 p4.dest = *(struct sockaddr_in *)&server;
1258 p4.src = *(struct sockaddr_in *)&client;
1259 data.dptr = (uint8_t *)&p4;
1260 data.dsize = sizeof(p4);
1262 #ifdef HAVE_STRUCT_CTDB_CONTROL_TCP_ADDR
1264 p.dest.ip6 = *(struct sockaddr_in6 *)&server;
1265 p.src.ip6 = *(struct sockaddr_in6 *)&client;
1266 data.dptr = (uint8_t *)&p;
1267 data.dsize = sizeof(p);
1271 return NT_STATUS_INTERNAL_ERROR;
1274 conn->release_ip_handler = release_ip_handler;
1277 * We want to be told about IP releases
1280 status = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP);
1281 if (!NT_STATUS_IS_OK(status)) {
1286 * inform ctdb of our tcp connection, so if IP takeover happens ctdb
1287 * can send an extra ack to trigger a reset for our client, so it
1288 * immediately reconnects
1290 return ctdbd_control(conn, CTDB_CURRENT_NODE,
1291 CTDB_CONTROL_TCP_CLIENT, 0,
1292 CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL, NULL);
1296 * We want to handle reconfigure events
1298 NTSTATUS ctdbd_register_reconfigure(struct ctdbd_connection *conn)
1300 return register_with_ctdbd(conn, CTDB_SRVID_RECONFIGURE);
1304 call a control on the local node
1306 NTSTATUS ctdbd_control_local(struct ctdbd_connection *conn, uint32 opcode,
1307 uint64_t srvid, uint32_t flags, TDB_DATA data,
1308 TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
1311 return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data, mem_ctx, outdata, cstatus);
1316 NTSTATUS ctdbd_init_connection(TALLOC_CTX *mem_ctx,
1317 struct ctdbd_connection **pconn)
1319 return NT_STATUS_NOT_IMPLEMENTED;