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https://github.com/samba-team/samba.git
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3c097c9a5f
added transport level packet allocator, allowing the transport to enforce alignment or special memory rules (This used to be ctdb commit 50304a5c4d8d640732678eeed793857334ca5ec1)
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
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ctdb over TCP
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Copyright (C) Andrew Tridgell 2006
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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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#include "includes.h"
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#include "lib/events/events.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "ctdb_private.h"
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#include "ctdb_tcp.h"
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/*
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start the protocol going
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*/
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int ctdb_tcp_start(struct ctdb_context *ctdb)
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{
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int i;
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/* listen on our own address */
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if (ctdb_tcp_listen(ctdb) != 0) return -1;
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/* startup connections to the other servers - will happen on
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next event loop */
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for (i=0;i<ctdb->num_nodes;i++) {
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struct ctdb_node *node = *(ctdb->nodes + i);
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if (!(ctdb->flags & CTDB_FLAG_SELF_CONNECT) &&
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ctdb_same_address(&ctdb->address, &node->address)) continue;
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event_add_timed(ctdb->ev, node, timeval_zero(),
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ctdb_tcp_node_connect, node);
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}
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return 0;
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}
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/*
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initialise tcp portion of a ctdb node
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*/
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int ctdb_tcp_add_node(struct ctdb_node *node)
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{
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struct ctdb_tcp_node *tnode;
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tnode = talloc_zero(node, struct ctdb_tcp_node);
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CTDB_NO_MEMORY(node->ctdb, tnode);
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tnode->fd = -1;
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node->private = tnode;
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return 0;
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}
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/*
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transport packet allocator - allows transport to control memory for packets
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*/
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void *ctdb_tcp_allocate_pkt(struct ctdb_context *ctdb, size_t size)
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{
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/* tcp transport needs to round to 8 byte alignment to ensure
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that we can use a length header and 64 bit elements in
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structures */
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size = (size+7) & ~7;
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return talloc_size(ctdb, size);
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}
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static const struct ctdb_methods ctdb_tcp_methods = {
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.start = ctdb_tcp_start,
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.add_node = ctdb_tcp_add_node,
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.queue_pkt = ctdb_tcp_queue_pkt,
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.allocate_pkt = ctdb_tcp_allocate_pkt
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};
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/*
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initialise tcp portion of ctdb
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*/
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int ctdb_tcp_init(struct ctdb_context *ctdb)
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{
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struct ctdb_tcp *ctcp;
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ctcp = talloc_zero(ctdb, struct ctdb_tcp);
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CTDB_NO_MEMORY(ctdb, ctcp);
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ctcp->listen_fd = -1;
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ctdb->private = ctcp;
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ctdb->methods = &ctdb_tcp_methods;
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return 0;
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}
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