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"
/*
this dispatches the messages to the registered ctdb message handler
*/
-static int ctdb_dispatch_message(struct ctdb_context *ctdb, uint32_t srvid, TDB_DATA data)
+int ctdb_dispatch_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data)
{
struct ctdb_message_list *ml;
- /* XXX we need a must faster way of finding the matching srvid
- - maybe a tree? */
for (ml=ctdb->message_list;ml;ml=ml->next) {
- if (ml->srvid == srvid || ml->srvid == CTDB_SRVID_ALL) break;
- }
- if (ml == NULL) {
- DEBUG(1,(__location__ " daemon vnn:%d no msg handler for srvid=%u\n",
- ctdb_get_vnn(ctdb), srvid));
- /* no registered message handler */
- return -1;
+ if (ml->srvid == srvid || ml->srvid == CTDB_SRVID_ALL) {
+ ml->message_handler(ctdb, srvid, data, ml->message_private);
+ }
}
- ml->message_handler(ctdb, srvid, data, ml->message_private);
return 0;
}
-
/*
called when a CTDB_REQ_MESSAGE packet comes in
*/
struct ctdb_req_message *c = (struct ctdb_req_message *)hdr;
TDB_DATA data;
- data.dptr = &c->data[0];
data.dsize = c->datalen;
+ data.dptr = talloc_memdup(c, &c->data[0], c->datalen);
ctdb_dispatch_message(ctdb, c->srvid, data);
}
-/*
- this local messaging handler is ugly, but is needed to prevent
- recursion in ctdb_send_message() when the destination node is the
- same as the source node
- */
-struct ctdb_local_message {
- struct ctdb_context *ctdb;
- uint32_t srvid;
- TDB_DATA data;
-};
-
-static void ctdb_local_message_trigger(struct event_context *ev, struct timed_event *te,
- struct timeval t, void *private_data)
-{
- struct ctdb_local_message *m = talloc_get_type(private_data,
- struct ctdb_local_message);
- int res;
-
- res = ctdb_dispatch_message(m->ctdb, m->srvid, m->data);
- if (res != 0) {
- DEBUG(0, (__location__ " Failed to dispatch message for srvid=%u\n", m->srvid));
- }
- talloc_free(m);
-}
-
-static int ctdb_local_message(struct ctdb_context *ctdb, uint32_t srvid, TDB_DATA data)
-{
- struct ctdb_local_message *m;
- m = talloc(ctdb, struct ctdb_local_message);
- CTDB_NO_MEMORY(ctdb, m);
-
- m->ctdb = ctdb;
- m->srvid = srvid;
- m->data = data;
- m->data.dptr = talloc_memdup(m, m->data.dptr, m->data.dsize);
- if (m->data.dptr == NULL) {
- talloc_free(m);
- return -1;
- }
-
- /* this needs to be done as an event to prevent recursion */
- event_add_timed(ctdb->ev, m, timeval_zero(), ctdb_local_message_trigger, m);
- return 0;
-}
-
-/*
- send a ctdb message
-*/
-int ctdb_daemon_send_message(struct ctdb_context *ctdb, uint32_t vnn,
- uint32_t srvid, TDB_DATA data)
-{
- struct ctdb_req_message *r;
- int len;
-
- /* see if this is a message to ourselves */
- if (vnn == ctdb->vnn && !(ctdb->flags & CTDB_FLAG_SELF_CONNECT)) {
- return ctdb_local_message(ctdb, srvid, data);
- }
-
- len = offsetof(struct ctdb_req_message, data) + data.dsize;
- r = ctdb->methods->allocate_pkt(ctdb, len);
- CTDB_NO_MEMORY(ctdb, r);
- talloc_set_name_const(r, "req_message packet");
-
- r->hdr.length = len;
- r->hdr.ctdb_magic = CTDB_MAGIC;
- r->hdr.ctdb_version = CTDB_VERSION;
- 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);
-
- ctdb_queue_packet(ctdb, &r->hdr);
-
- talloc_free(r);
- return 0;
-}
-
/*
when a client goes away, we need to remove its srvid handler from the list
*/
int ctdb_register_message_handler(struct ctdb_context *ctdb,
TALLOC_CTX *mem_ctx,
- uint32_t srvid,
- ctdb_message_fn_t handler,
+ uint64_t srvid,
+ ctdb_msg_fn_t handler,
void *private_data)
{
struct ctdb_message_list *m;
return 0;
}
+
+
+/*
+ setup handler for receipt of ctdb messages from ctdb_send_message()
+*/
+int ctdb_deregister_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data)
+{
+ 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;
+}
git.samba.org / sahlberg / ctdb.git / blobdiff