Copyright (C) Andrew Tridgell 2007
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/*
see http://wiki.samba.org/index.php/Samba_%26_Clustering for
protocol design and packet details
*/
#include "includes.h"
-#include "lib/events/events.h"
+#include "lib/tevent/tevent.h"
#include "lib/tdb/include/tdb.h"
#include "system/network.h"
#include "system/filesys.h"
#include "../include/ctdb_private.h"
+#include "lib/util/dlinklist.h"
+
+/*
+ this dispatches the messages to the registered ctdb message handler
+*/
+int ctdb_dispatch_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data)
+{
+ struct ctdb_message_list *ml;
+ for (ml=ctdb->message_list;ml;ml=ml->next) {
+ if (ml->srvid == srvid || ml->srvid == CTDB_SRVID_ALL) {
+ ml->message_handler(ctdb, srvid, data, ml->message_private);
+ }
+ }
+
+ return 0;
+}
/*
called when a CTDB_REQ_MESSAGE packet comes in
-
- this dispatches the messages to the registered ctdb message handler
*/
void ctdb_request_message(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
{
struct ctdb_req_message *c = (struct ctdb_req_message *)hdr;
TDB_DATA data;
- if (ctdb->message_handler == NULL) {
- /* no registered message handler */
- talloc_free(hdr);
- return;
- }
- data.dptr = &c->data[0];
+
data.dsize = c->datalen;
- ctdb->message_handler(ctdb, c->srvid, data, ctdb->message_private);
- talloc_free(hdr);
+ data.dptr = talloc_memdup(c, &c->data[0], c->datalen);
+
+ ctdb_dispatch_message(ctdb, c->srvid, data);
}
/*
- send a ctdb message
+ when a client goes away, we need to remove its srvid handler from the list
+ */
+static int message_handler_destructor(struct ctdb_message_list *m)
+{
+ DLIST_REMOVE(m->ctdb->message_list, m);
+ return 0;
+}
+
+/*
+ setup handler for receipt of ctdb messages from ctdb_send_message()
*/
-int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
- uint32_t srvid, uint32_t msg_type, TDB_DATA data)
+int ctdb_register_message_handler(struct ctdb_context *ctdb,
+ TALLOC_CTX *mem_ctx,
+ uint64_t srvid,
+ ctdb_msg_fn_t handler,
+ void *private_data)
{
- struct ctdb_req_message *r;
- int len;
-
- len = offsetof(struct ctdb_req_message, data) + data.dsize;
- r = ctdb->methods->allocate_pkt(ctdb, len);
- CTDB_NO_MEMORY(ctdb, r);
-
- r->hdr.length = len;
- r->hdr.operation = CTDB_REQ_MESSAGE;
- r->hdr.destnode = vnn;
- r->hdr.srcnode = ctdb->vnn;
- r->hdr.reqid = 0;
- r->srvid = srvid;
- r->datalen = data.dsize;
- memcpy(&r->data[0], data.dptr, data.dsize);
+ struct ctdb_message_list *m;
+
+ m = talloc(mem_ctx, struct ctdb_message_list);
+ CTDB_NO_MEMORY(ctdb, m);
+
+ m->ctdb = ctdb;
+ m->srvid = srvid;
+ m->message_handler = handler;
+ m->message_private = private_data;
- ctdb_queue_packet(ctdb, &r->hdr);
+ DLIST_ADD(ctdb->message_list, m);
+
+ talloc_set_destructor(m, message_handler_destructor);
- talloc_free(r);
return 0;
}
+
/*
setup handler for receipt of ctdb messages from ctdb_send_message()
*/
-int ctdb_set_message_handler(struct ctdb_context *ctdb, ctdb_message_fn_t handler,
- void *private)
+int ctdb_deregister_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data)
{
- ctdb->message_handler = handler;
- ctdb->message_private = private;
- return 0;
-}
+ struct ctdb_message_list *m;
+ for (m=ctdb->message_list;m;m=m->next) {
+ if (m->srvid == srvid && m->message_private == private_data) {
+ talloc_free(m);
+ return 0;
+ }
+ }
+ return -1;
+}