2 Unix SMB/CIFS implementation.
4 Samba internal messaging functions
6 Copyright (C) Andrew Tridgell 2004
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "lib/events/events.h"
24 #include "system/filesys.h"
25 #include "messaging/messaging.h"
26 #include "lib/util/dlinklist.h"
27 #include "lib/socket/socket.h"
28 #include "librpc/gen_ndr/ndr_irpc.h"
29 #include "lib/messaging/irpc.h"
31 #include "lib/util/unix_privs.h"
32 #include "librpc/rpc/dcerpc.h"
33 #include "lib/tdb/include/tdb.h"
34 #include "lib/util/util_tdb.h"
35 #include "lib/util/util_tdb.h"
36 #include "cluster/cluster.h"
37 #include "param/param.h"
39 /* change the message version with any incompatible changes in the protocol */
40 #define MESSAGING_VERSION 1
42 struct messaging_context {
43 struct server_id server_id;
44 struct socket_context *sock;
45 const char *base_path;
47 struct dispatch_fn **dispatch;
49 struct idr_context *dispatch_tree;
50 struct messaging_rec *pending;
51 struct messaging_rec *retry_queue;
52 struct smb_iconv_convenience *iconv_convenience;
53 struct irpc_list *irpc;
54 struct idr_context *idr;
56 struct timeval start_time;
57 struct timed_event *retry_te;
59 struct event_context *ev;
64 /* we have a linked list of dispatch handlers for each msg_type that
65 this messaging server can deal with */
67 struct dispatch_fn *next, *prev;
73 /* an individual message */
74 struct messaging_rec {
75 struct messaging_rec *next, *prev;
76 struct messaging_context *msg;
79 struct messaging_header {
82 struct server_id from;
92 static void irpc_handler(struct messaging_context *, void *,
93 uint32_t, struct server_id, DATA_BLOB *);
97 A useful function for testing the message system.
99 static void ping_message(struct messaging_context *msg, void *private,
100 uint32_t msg_type, struct server_id src, DATA_BLOB *data)
102 DEBUG(1,("INFO: Received PING message from server %u.%u [%.*s]\n",
103 (uint_t)src.node, (uint_t)src.id, (int)data->length,
104 data->data?(const char *)data->data:""));
105 messaging_send(msg, src, MSG_PONG, data);
109 return uptime of messaging server via irpc
111 static NTSTATUS irpc_uptime(struct irpc_message *msg,
112 struct irpc_uptime *r)
114 struct messaging_context *ctx = talloc_get_type(msg->private, struct messaging_context);
115 *r->out.start_time = timeval_to_nttime(&ctx->start_time);
120 return the path to a messaging socket
122 static char *messaging_path(struct messaging_context *msg, struct server_id server_id)
124 return talloc_asprintf(msg, "%s/msg.%s", msg->base_path,
125 cluster_id_string(msg, server_id));
129 dispatch a fully received message
131 note that this deliberately can match more than one message handler
132 per message. That allows a single messasging context to register
133 (for example) a debug handler for more than one piece of code
135 static void messaging_dispatch(struct messaging_context *msg, struct messaging_rec *rec)
137 struct dispatch_fn *d, *next;
139 /* temporary IDs use an idtree, the rest use a array of pointers */
140 if (rec->header->msg_type >= MSG_TMP_BASE) {
141 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
142 rec->header->msg_type);
143 } else if (rec->header->msg_type < msg->num_types) {
144 d = msg->dispatch[rec->header->msg_type];
149 for (; d; d = next) {
152 data.data = rec->packet.data + sizeof(*rec->header);
153 data.length = rec->header->length;
154 d->fn(msg, d->private, d->msg_type, rec->header->from, &data);
156 rec->header->length = 0;
160 handler for messages that arrive from other nodes in the cluster
162 static void cluster_message_handler(struct messaging_context *msg, DATA_BLOB packet)
164 struct messaging_rec *rec;
166 rec = talloc(msg, struct messaging_rec);
168 smb_panic("Unable to allocate messaging_rec");
172 rec->path = msg->path;
173 rec->header = (struct messaging_header *)packet.data;
174 rec->packet = packet;
177 if (packet.length != sizeof(*rec->header) + rec->header->length) {
178 DEBUG(0,("messaging: bad message header size %d should be %d\n",
179 rec->header->length, (int)(packet.length - sizeof(*rec->header))));
184 messaging_dispatch(msg, rec);
191 try to send the message
193 static NTSTATUS try_send(struct messaging_rec *rec)
195 struct messaging_context *msg = rec->msg;
199 struct socket_address *path;
201 /* rec->path is the path of the *other* socket, where we want
203 path = socket_address_from_strings(msg, msg->sock->backend_name,
206 return NT_STATUS_NO_MEMORY;
209 /* we send with privileges so messages work from any context */
210 priv = root_privileges();
211 status = socket_sendto(msg->sock, &rec->packet, &nsent, path);
219 retry backed off messages
221 static void msg_retry_timer(struct event_context *ev, struct timed_event *te,
222 struct timeval t, void *private)
224 struct messaging_context *msg = talloc_get_type(private,
225 struct messaging_context);
226 msg->retry_te = NULL;
228 /* put the messages back on the main queue */
229 while (msg->retry_queue) {
230 struct messaging_rec *rec = msg->retry_queue;
231 DLIST_REMOVE(msg->retry_queue, rec);
232 DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
235 EVENT_FD_WRITEABLE(msg->event.fde);
239 handle a socket write event
241 static void messaging_send_handler(struct messaging_context *msg)
243 while (msg->pending) {
244 struct messaging_rec *rec = msg->pending;
246 status = try_send(rec);
247 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
249 if (rec->retries > 3) {
250 /* we're getting continuous write errors -
251 backoff this record */
252 DLIST_REMOVE(msg->pending, rec);
253 DLIST_ADD_END(msg->retry_queue, rec,
254 struct messaging_rec *);
255 if (msg->retry_te == NULL) {
257 event_add_timed(msg->event.ev, msg,
258 timeval_current_ofs(1, 0),
259 msg_retry_timer, msg);
265 if (!NT_STATUS_IS_OK(status)) {
266 DEBUG(1,("messaging: Lost message from %s to %s of type %u - %s\n",
267 cluster_id_string(debug_ctx(), rec->header->from),
268 cluster_id_string(debug_ctx(), rec->header->to),
269 rec->header->msg_type,
272 DLIST_REMOVE(msg->pending, rec);
275 if (msg->pending == NULL) {
276 EVENT_FD_NOT_WRITEABLE(msg->event.fde);
281 handle a new incoming packet
283 static void messaging_recv_handler(struct messaging_context *msg)
285 struct messaging_rec *rec;
290 /* see how many bytes are in the next packet */
291 status = socket_pending(msg->sock, &msize);
292 if (!NT_STATUS_IS_OK(status)) {
293 DEBUG(0,("socket_pending failed in messaging - %s\n",
298 packet = data_blob_talloc(msg, NULL, msize);
299 if (packet.data == NULL) {
300 /* assume this is temporary and retry */
304 status = socket_recv(msg->sock, packet.data, msize, &msize);
305 if (!NT_STATUS_IS_OK(status)) {
306 data_blob_free(&packet);
310 if (msize < sizeof(*rec->header)) {
311 DEBUG(0,("messaging: bad message of size %d\n", (int)msize));
312 data_blob_free(&packet);
316 rec = talloc(msg, struct messaging_rec);
318 smb_panic("Unable to allocate messaging_rec");
321 talloc_steal(rec, packet.data);
323 rec->path = msg->path;
324 rec->header = (struct messaging_header *)packet.data;
325 rec->packet = packet;
328 if (msize != sizeof(*rec->header) + rec->header->length) {
329 DEBUG(0,("messaging: bad message header size %d should be %d\n",
330 rec->header->length, (int)(msize - sizeof(*rec->header))));
335 messaging_dispatch(msg, rec);
341 handle a socket event
343 static void messaging_handler(struct event_context *ev, struct fd_event *fde,
344 uint16_t flags, void *private)
346 struct messaging_context *msg = talloc_get_type(private,
347 struct messaging_context);
348 if (flags & EVENT_FD_WRITE) {
349 messaging_send_handler(msg);
351 if (flags & EVENT_FD_READ) {
352 messaging_recv_handler(msg);
358 Register a dispatch function for a particular message type.
360 NTSTATUS messaging_register(struct messaging_context *msg, void *private,
361 uint32_t msg_type, msg_callback_t fn)
363 struct dispatch_fn *d;
365 /* possibly expand dispatch array */
366 if (msg_type >= msg->num_types) {
367 struct dispatch_fn **dp;
369 dp = talloc_realloc(msg, msg->dispatch, struct dispatch_fn *, msg_type+1);
370 NT_STATUS_HAVE_NO_MEMORY(dp);
372 for (i=msg->num_types;i<=msg_type;i++) {
373 msg->dispatch[i] = NULL;
375 msg->num_types = msg_type+1;
378 d = talloc_zero(msg->dispatch, struct dispatch_fn);
379 NT_STATUS_HAVE_NO_MEMORY(d);
380 d->msg_type = msg_type;
381 d->private = private;
384 DLIST_ADD(msg->dispatch[msg_type], d);
390 register a temporary message handler. The msg_type is allocated
393 NTSTATUS messaging_register_tmp(struct messaging_context *msg, void *private,
394 msg_callback_t fn, uint32_t *msg_type)
396 struct dispatch_fn *d;
399 d = talloc_zero(msg->dispatch, struct dispatch_fn);
400 NT_STATUS_HAVE_NO_MEMORY(d);
401 d->private = private;
404 id = idr_get_new_above(msg->dispatch_tree, d, MSG_TMP_BASE, UINT16_MAX);
407 return NT_STATUS_TOO_MANY_CONTEXT_IDS;
410 d->msg_type = (uint32_t)id;
411 (*msg_type) = d->msg_type;
417 De-register the function for a particular message type.
419 void messaging_deregister(struct messaging_context *msg, uint32_t msg_type, void *private)
421 struct dispatch_fn *d, *next;
423 if (msg_type >= msg->num_types) {
424 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
427 idr_remove(msg->dispatch_tree, msg_type);
432 for (d = msg->dispatch[msg_type]; d; d = next) {
434 if (d->private == private) {
435 DLIST_REMOVE(msg->dispatch[msg_type], d);
442 Send a message to a particular server
444 NTSTATUS messaging_send(struct messaging_context *msg, struct server_id server,
445 uint32_t msg_type, DATA_BLOB *data)
447 struct messaging_rec *rec;
449 size_t dlength = data?data->length:0;
451 rec = talloc(msg, struct messaging_rec);
453 return NT_STATUS_NO_MEMORY;
456 rec->packet = data_blob_talloc(rec, NULL, sizeof(*rec->header) + dlength);
457 if (rec->packet.data == NULL) {
459 return NT_STATUS_NO_MEMORY;
464 rec->header = (struct messaging_header *)rec->packet.data;
466 ZERO_STRUCTP(rec->header);
467 rec->header->version = MESSAGING_VERSION;
468 rec->header->msg_type = msg_type;
469 rec->header->from = msg->server_id;
470 rec->header->to = server;
471 rec->header->length = dlength;
473 memcpy(rec->packet.data + sizeof(*rec->header),
474 data->data, dlength);
477 if (!cluster_node_equal(&msg->server_id, &server)) {
478 /* the destination is on another node - dispatch via
480 status = cluster_message_send(server, &rec->packet);
485 rec->path = messaging_path(msg, server);
486 talloc_steal(rec, rec->path);
488 if (msg->pending != NULL) {
489 status = STATUS_MORE_ENTRIES;
491 status = try_send(rec);
494 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
495 if (msg->pending == NULL) {
496 EVENT_FD_WRITEABLE(msg->event.fde);
498 DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
508 Send a message to a particular server, with the message containing a single pointer
510 NTSTATUS messaging_send_ptr(struct messaging_context *msg, struct server_id server,
511 uint32_t msg_type, void *ptr)
515 blob.data = (uint8_t *)&ptr;
516 blob.length = sizeof(void *);
518 return messaging_send(msg, server, msg_type, &blob);
523 destroy the messaging context
525 static int messaging_destructor(struct messaging_context *msg)
528 while (msg->names && msg->names[0]) {
529 irpc_remove_name(msg, msg->names[0]);
535 create the listening socket and setup the dispatcher
537 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
539 struct server_id server_id,
540 struct smb_iconv_convenience *iconv_convenience,
541 struct event_context *ev)
543 struct messaging_context *msg;
545 struct socket_address *path;
551 msg = talloc_zero(mem_ctx, struct messaging_context);
556 /* setup a handler for messages from other cluster nodes, if appropriate */
557 status = cluster_message_init(msg, server_id, cluster_message_handler);
558 if (!NT_STATUS_IS_OK(status)) {
563 /* create the messaging directory if needed */
566 msg->base_path = talloc_reference(msg, dir);
567 msg->path = messaging_path(msg, server_id);
568 msg->server_id = server_id;
569 msg->iconv_convenience = iconv_convenience;
570 msg->idr = idr_init(msg);
571 msg->dispatch_tree = idr_init(msg);
572 msg->start_time = timeval_current();
574 status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
575 if (!NT_STATUS_IS_OK(status)) {
580 /* by stealing here we ensure that the socket is cleaned up (and even
582 talloc_steal(msg, msg->sock);
584 path = socket_address_from_strings(msg, msg->sock->backend_name,
591 status = socket_listen(msg->sock, path, 50, 0);
592 if (!NT_STATUS_IS_OK(status)) {
593 DEBUG(0,("Unable to setup messaging listener for '%s':%s\n", msg->path, nt_errstr(status)));
598 /* it needs to be non blocking for sends */
599 set_blocking(socket_get_fd(msg->sock), false);
601 msg->event.ev = talloc_reference(msg, ev);
602 msg->event.fde = event_add_fd(ev, msg, socket_get_fd(msg->sock),
603 EVENT_FD_READ, messaging_handler, msg);
605 talloc_set_destructor(msg, messaging_destructor);
607 messaging_register(msg, NULL, MSG_PING, ping_message);
608 messaging_register(msg, NULL, MSG_IRPC, irpc_handler);
609 IRPC_REGISTER(msg, irpc, IRPC_UPTIME, irpc_uptime, msg);
615 A hack, for the short term until we get 'client only' messaging in place
617 struct messaging_context *messaging_client_init(TALLOC_CTX *mem_ctx,
619 struct smb_iconv_convenience *iconv_convenience,
620 struct event_context *ev)
624 id.id = random() % 0x10000000;
625 return messaging_init(mem_ctx, dir, id, iconv_convenience, ev);
628 a list of registered irpc server functions
631 struct irpc_list *next, *prev;
633 const struct ndr_interface_table *table;
641 register a irpc server function
643 NTSTATUS irpc_register(struct messaging_context *msg_ctx,
644 const struct ndr_interface_table *table,
645 int callnum, irpc_function_t fn, void *private)
647 struct irpc_list *irpc;
649 /* override an existing handler, if any */
650 for (irpc=msg_ctx->irpc; irpc; irpc=irpc->next) {
651 if (irpc->table == table && irpc->callnum == callnum) {
656 irpc = talloc(msg_ctx, struct irpc_list);
657 NT_STATUS_HAVE_NO_MEMORY(irpc);
658 DLIST_ADD(msg_ctx->irpc, irpc);
662 irpc->callnum = callnum;
664 irpc->private = private;
665 irpc->uuid = irpc->table->syntax_id.uuid;
672 handle an incoming irpc reply message
674 static void irpc_handler_reply(struct messaging_context *msg_ctx, struct irpc_message *m)
676 struct irpc_request *irpc;
677 enum ndr_err_code ndr_err;
679 irpc = (struct irpc_request *)idr_find(msg_ctx->idr, m->header.callid);
680 if (irpc == NULL) return;
682 /* parse the reply data */
683 ndr_err = irpc->table->calls[irpc->callnum].ndr_pull(m->ndr, NDR_OUT, irpc->r);
684 if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
685 irpc->status = m->header.status;
686 talloc_steal(irpc->mem_ctx, m);
688 irpc->status = ndr_map_error2ntstatus(ndr_err);
689 talloc_steal(irpc, m);
692 if (irpc->async.fn) {
693 irpc->async.fn(irpc);
700 NTSTATUS irpc_send_reply(struct irpc_message *m, NTSTATUS status)
702 struct ndr_push *push;
704 enum ndr_err_code ndr_err;
706 m->header.status = status;
708 /* setup the reply */
709 push = ndr_push_init_ctx(m->ndr, m->msg_ctx->iconv_convenience);
711 status = NT_STATUS_NO_MEMORY;
715 m->header.flags |= IRPC_FLAG_REPLY;
717 /* construct the packet */
718 ndr_err = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, &m->header);
719 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
720 status = ndr_map_error2ntstatus(ndr_err);
724 ndr_err = m->irpc->table->calls[m->irpc->callnum].ndr_push(push, NDR_OUT, m->data);
725 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
726 status = ndr_map_error2ntstatus(ndr_err);
730 /* send the reply message */
731 packet = ndr_push_blob(push);
732 status = messaging_send(m->msg_ctx, m->from, MSG_IRPC, &packet);
733 if (!NT_STATUS_IS_OK(status)) goto failed;
741 handle an incoming irpc request message
743 static void irpc_handler_request(struct messaging_context *msg_ctx,
744 struct irpc_message *m)
748 enum ndr_err_code ndr_err;
750 for (i=msg_ctx->irpc; i; i=i->next) {
751 if (GUID_equal(&i->uuid, &m->header.uuid) &&
752 i->table->syntax_id.if_version == m->header.if_version &&
753 i->callnum == m->header.callnum) {
759 /* no registered handler for this message */
764 /* allocate space for the structure */
765 r = talloc_zero_size(m->ndr, i->table->calls[m->header.callnum].struct_size);
766 if (r == NULL) goto failed;
768 /* parse the request data */
769 ndr_err = i->table->calls[i->callnum].ndr_pull(m->ndr, NDR_IN, r);
770 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
773 m->private = i->private;
774 m->defer_reply = false;
775 m->msg_ctx = msg_ctx;
778 m->ev = msg_ctx->event.ev;
780 m->header.status = i->fn(m, r);
782 if (m->defer_reply) {
783 /* the server function has asked to defer the reply to later */
784 talloc_steal(msg_ctx, m);
788 irpc_send_reply(m, m->header.status);
796 handle an incoming irpc message
798 static void irpc_handler(struct messaging_context *msg_ctx, void *private,
799 uint32_t msg_type, struct server_id src, DATA_BLOB *packet)
801 struct irpc_message *m;
802 enum ndr_err_code ndr_err;
804 m = talloc(msg_ctx, struct irpc_message);
805 if (m == NULL) goto failed;
809 m->ndr = ndr_pull_init_blob(packet, m, msg_ctx->iconv_convenience);
810 if (m->ndr == NULL) goto failed;
812 m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
814 ndr_err = ndr_pull_irpc_header(m->ndr, NDR_BUFFERS|NDR_SCALARS, &m->header);
815 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
817 if (m->header.flags & IRPC_FLAG_REPLY) {
818 irpc_handler_reply(msg_ctx, m);
820 irpc_handler_request(msg_ctx, m);
830 destroy a irpc request
832 static int irpc_destructor(struct irpc_request *irpc)
834 if (irpc->callid != -1) {
835 idr_remove(irpc->msg_ctx->idr, irpc->callid);
839 if (irpc->reject_free) {
846 timeout a irpc request
848 static void irpc_timeout(struct event_context *ev, struct timed_event *te,
849 struct timeval t, void *private)
851 struct irpc_request *irpc = talloc_get_type(private, struct irpc_request);
852 irpc->status = NT_STATUS_IO_TIMEOUT;
854 if (irpc->async.fn) {
855 irpc->async.fn(irpc);
861 make a irpc call - async send
863 struct irpc_request *irpc_call_send(struct messaging_context *msg_ctx,
864 struct server_id server_id,
865 const struct ndr_interface_table *table,
866 int callnum, void *r, TALLOC_CTX *ctx)
868 struct irpc_header header;
869 struct ndr_push *ndr;
872 struct irpc_request *irpc;
873 enum ndr_err_code ndr_err;
875 irpc = talloc(msg_ctx, struct irpc_request);
876 if (irpc == NULL) goto failed;
878 irpc->msg_ctx = msg_ctx;
880 irpc->callnum = callnum;
881 irpc->callid = idr_get_new(msg_ctx->idr, irpc, UINT16_MAX);
882 if (irpc->callid == -1) goto failed;
885 irpc->async.fn = NULL;
887 irpc->reject_free = false;
889 talloc_set_destructor(irpc, irpc_destructor);
891 /* setup the header */
892 header.uuid = table->syntax_id.uuid;
894 header.if_version = table->syntax_id.if_version;
895 header.callid = irpc->callid;
896 header.callnum = callnum;
898 header.status = NT_STATUS_OK;
900 /* construct the irpc packet */
901 ndr = ndr_push_init_ctx(irpc, msg_ctx->iconv_convenience);
902 if (ndr == NULL) goto failed;
904 ndr_err = ndr_push_irpc_header(ndr, NDR_SCALARS|NDR_BUFFERS, &header);
905 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
907 ndr_err = table->calls[callnum].ndr_push(ndr, NDR_IN, r);
908 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
911 packet = ndr_push_blob(ndr);
912 status = messaging_send(msg_ctx, server_id, MSG_IRPC, &packet);
913 if (!NT_STATUS_IS_OK(status)) goto failed;
915 event_add_timed(msg_ctx->event.ev, irpc,
916 timeval_current_ofs(IRPC_CALL_TIMEOUT, 0),
928 wait for a irpc reply
930 NTSTATUS irpc_call_recv(struct irpc_request *irpc)
934 NT_STATUS_HAVE_NO_MEMORY(irpc);
936 irpc->reject_free = true;
938 while (!irpc->done) {
939 if (event_loop_once(irpc->msg_ctx->event.ev) != 0) {
940 return NT_STATUS_CONNECTION_DISCONNECTED;
944 irpc->reject_free = false;
946 status = irpc->status;
952 perform a synchronous irpc request
954 NTSTATUS irpc_call(struct messaging_context *msg_ctx,
955 struct server_id server_id,
956 const struct ndr_interface_table *table,
957 int callnum, void *r,
960 struct irpc_request *irpc = irpc_call_send(msg_ctx, server_id,
961 table, callnum, r, mem_ctx);
962 return irpc_call_recv(irpc);
966 open the naming database
968 static struct tdb_wrap *irpc_namedb_open(struct messaging_context *msg_ctx)
971 char *path = talloc_asprintf(msg_ctx, "%s/names.tdb", msg_ctx->base_path);
975 t = tdb_wrap_open(msg_ctx, path, 0, 0, O_RDWR|O_CREAT, 0660);
982 add a string name that this irpc server can be called on
984 NTSTATUS irpc_add_name(struct messaging_context *msg_ctx, const char *name)
989 NTSTATUS status = NT_STATUS_OK;
991 t = irpc_namedb_open(msg_ctx);
992 NT_STATUS_HAVE_NO_MEMORY(t);
994 if (tdb_lock_bystring(t->tdb, name) != 0) {
996 return NT_STATUS_LOCK_NOT_GRANTED;
998 rec = tdb_fetch_bystring(t->tdb, name);
999 count = rec.dsize / sizeof(struct server_id);
1000 rec.dptr = (unsigned char *)realloc_p(rec.dptr, struct server_id, count+1);
1001 rec.dsize += sizeof(struct server_id);
1002 if (rec.dptr == NULL) {
1003 tdb_unlock_bystring(t->tdb, name);
1005 return NT_STATUS_NO_MEMORY;
1007 ((struct server_id *)rec.dptr)[count] = msg_ctx->server_id;
1008 if (tdb_store_bystring(t->tdb, name, rec, 0) != 0) {
1009 status = NT_STATUS_INTERNAL_ERROR;
1012 tdb_unlock_bystring(t->tdb, name);
1015 msg_ctx->names = str_list_add(msg_ctx->names, name);
1016 talloc_steal(msg_ctx, msg_ctx->names);
1022 return a list of server ids for a server name
1024 struct server_id *irpc_servers_byname(struct messaging_context *msg_ctx,
1025 TALLOC_CTX *mem_ctx,
1031 struct server_id *ret;
1033 t = irpc_namedb_open(msg_ctx);
1038 if (tdb_lock_bystring(t->tdb, name) != 0) {
1042 rec = tdb_fetch_bystring(t->tdb, name);
1043 if (rec.dptr == NULL) {
1044 tdb_unlock_bystring(t->tdb, name);
1048 count = rec.dsize / sizeof(struct server_id);
1049 ret = talloc_array(mem_ctx, struct server_id, count+1);
1051 tdb_unlock_bystring(t->tdb, name);
1055 for (i=0;i<count;i++) {
1056 ret[i] = ((struct server_id *)rec.dptr)[i];
1058 ret[i] = cluster_id(0, 0);
1060 tdb_unlock_bystring(t->tdb, name);
1067 remove a name from a messaging context
1069 void irpc_remove_name(struct messaging_context *msg_ctx, const char *name)
1074 struct server_id *ids;
1076 str_list_remove(msg_ctx->names, name);
1078 t = irpc_namedb_open(msg_ctx);
1083 if (tdb_lock_bystring(t->tdb, name) != 0) {
1087 rec = tdb_fetch_bystring(t->tdb, name);
1088 count = rec.dsize / sizeof(struct server_id);
1090 tdb_unlock_bystring(t->tdb, name);
1094 ids = (struct server_id *)rec.dptr;
1095 for (i=0;i<count;i++) {
1096 if (cluster_id_equal(&ids[i], &msg_ctx->server_id)) {
1098 memmove(ids+i, ids+i+1,
1099 sizeof(struct server_id) * (count-(i+1)));
1101 rec.dsize -= sizeof(struct server_id);
1105 tdb_store_bystring(t->tdb, name, rec, 0);
1107 tdb_unlock_bystring(t->tdb, name);