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https://github.com/samba-team/samba.git
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f71f62fabd
(This used to be ctdb commit d147a434f827f83cf90228a3ed37338db8e9df13)
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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ctdb_message protocol code
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Copyright (C) Andrew Tridgell 2007
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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/*
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called when a CTDB_REQ_MESSAGE packet comes in
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this dispatches the messages to the registered ctdb message handler
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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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if (ctdb->message_handler == NULL) {
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printf("no msg handler\n");
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/* no registered message handler */
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talloc_free(hdr);
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return;
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}
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data.dptr = &c->data[0];
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data.dsize = c->datalen;
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ctdb->message_handler(ctdb, c->srvid, data, ctdb->message_private);
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talloc_free(hdr);
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}
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/*
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send a ctdb message
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*/
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int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
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uint32_t srvid, TDB_DATA data)
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{
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struct ctdb_req_message *r;
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int len;
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len = offsetof(struct ctdb_req_message, data) + data.dsize;
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r = ctdb->methods->allocate_pkt(ctdb, len);
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CTDB_NO_MEMORY(ctdb, r);
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r->hdr.length = len;
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r->hdr.operation = CTDB_REQ_MESSAGE;
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r->hdr.destnode = vnn;
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r->hdr.srcnode = ctdb->vnn;
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r->hdr.reqid = 0;
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r->srvid = srvid;
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r->datalen = data.dsize;
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memcpy(&r->data[0], data.dptr, data.dsize);
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ctdb_queue_packet(ctdb, &r->hdr);
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talloc_free(r);
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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_set_message_handler(struct ctdb_context *ctdb, ctdb_message_fn_t handler,
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void *private)
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{
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ctdb->message_handler = handler;
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ctdb->message_private = private;
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return 0;
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}
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