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b196077cbb
This doesn't get the ctdb code fully working in Samba4, it just gets it building and not breaking non-clustered use of Samba. It will take a bit longer to update some of the calling ctdb_cluster.c code to make it work correctly in Samba4. Note also that Samba4 now only links to the client portion of ctdb. For the moment I am leaving the ctdbd as a separate daemon, which you install separately from http://ctdb.samba.org/.
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
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ctdb_message protocol code
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Copyright (C) Andrew Tridgell 2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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see http://wiki.samba.org/index.php/Samba_%26_Clustering for
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protocol design and packet details
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "lib/tdb/include/tdb.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "../include/ctdb_private.h"
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#include "lib/util/dlinklist.h"
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/*
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this dispatches the messages to the registered ctdb message handler
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*/
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int ctdb_dispatch_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data)
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{
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struct ctdb_message_list *ml;
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for (ml=ctdb->message_list;ml;ml=ml->next) {
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if (ml->srvid == srvid || ml->srvid == CTDB_SRVID_ALL) {
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ml->message_handler(ctdb, srvid, data, ml->message_private);
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}
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}
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return 0;
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}
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/*
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called when a CTDB_REQ_MESSAGE packet comes in
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*/
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void ctdb_request_message(struct ctdb_context *ctdb, struct ctdb_req_header *hdr)
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{
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struct ctdb_req_message *c = (struct ctdb_req_message *)hdr;
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TDB_DATA data;
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data.dptr = &c->data[0];
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data.dsize = c->datalen;
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ctdb_dispatch_message(ctdb, c->srvid, data);
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}
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/*
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when a client goes away, we need to remove its srvid handler from the list
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*/
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static int message_handler_destructor(struct ctdb_message_list *m)
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{
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DLIST_REMOVE(m->ctdb->message_list, m);
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return 0;
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}
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/*
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setup handler for receipt of ctdb messages from ctdb_send_message()
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*/
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int ctdb_register_message_handler(struct ctdb_context *ctdb,
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TALLOC_CTX *mem_ctx,
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uint64_t srvid,
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ctdb_message_fn_t handler,
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void *private_data)
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{
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struct ctdb_message_list *m;
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m = talloc(mem_ctx, struct ctdb_message_list);
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CTDB_NO_MEMORY(ctdb, m);
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m->ctdb = ctdb;
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m->srvid = srvid;
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m->message_handler = handler;
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m->message_private = private_data;
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DLIST_ADD(ctdb->message_list, m);
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talloc_set_destructor(m, message_handler_destructor);
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return 0;
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}
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/*
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setup handler for receipt of ctdb messages from ctdb_send_message()
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*/
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int ctdb_deregister_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data)
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{
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struct ctdb_message_list *m;
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for (m=ctdb->message_list;m;m=m->next) {
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if (m->srvid == srvid && m->message_private == private_data) {
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talloc_free(m);
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return 0;
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}
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}
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return -1;
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}
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