mirror of
https://github.com/samba-team/samba.git
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32de198fd3
(This used to be ctdb commit f0555484105668c01c21f56322992e752e831109)
141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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ctdb over TCP
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Copyright (C) Andrew Tridgell 2006
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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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#include "includes.h"
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#include "lib/tdb/include/tdb.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 "../include/ctdb_private.h"
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#include "ctdb_tcp.h"
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/*
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initialise tcp portion of a ctdb node
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*/
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static int ctdb_tcp_add_node(struct ctdb_node *node)
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{
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struct ctdb_tcp *ctcp = talloc_get_type(node->ctdb->private_data,
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struct ctdb_tcp);
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struct ctdb_tcp_node *tnode;
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tnode = talloc_zero(ctcp, 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_data = tnode;
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tnode->out_queue = ctdb_queue_setup(node->ctdb, ctcp, tnode->fd, CTDB_TCP_ALIGNMENT,
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ctdb_tcp_tnode_cb, node);
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return 0;
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}
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/*
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initialise transport structures
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*/
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static int ctdb_tcp_initialise(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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for (i=0; i<ctdb->num_nodes; i++) {
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if (ctdb_tcp_add_node(ctdb->nodes[i]) != 0) {
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DEBUG(0, ("methods->add_node failed at %d\n", i));
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return -1;
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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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start the protocol going
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*/
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static int ctdb_tcp_start(struct ctdb_context *ctdb)
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{
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int i;
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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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struct ctdb_tcp_node *tnode = talloc_get_type(
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node->private_data, struct ctdb_tcp_node);
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if (!ctdb_same_address(&ctdb->address, &node->address)) {
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event_add_timed(ctdb->ev, tnode, timeval_zero(),
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ctdb_tcp_node_connect, node);
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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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shutdown the transport
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*/
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static void ctdb_tcp_shutdown(struct ctdb_context *ctdb)
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{
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struct ctdb_tcp *ctcp = talloc_get_type(ctdb->private_data,
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struct ctdb_tcp);
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talloc_free(ctcp);
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ctdb->private_data = NULL;
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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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static void *ctdb_tcp_allocate_pkt(TALLOC_CTX *mem_ctx, 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+(CTDB_TCP_ALIGNMENT-1)) & ~(CTDB_TCP_ALIGNMENT-1);
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return talloc_size(mem_ctx, size);
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}
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static const struct ctdb_methods ctdb_tcp_methods = {
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.initialise = ctdb_tcp_initialise,
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.start = ctdb_tcp_start,
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.queue_pkt = ctdb_tcp_queue_pkt,
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.add_node = ctdb_tcp_add_node,
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.allocate_pkt = ctdb_tcp_allocate_pkt,
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.shutdown = ctdb_tcp_shutdown,
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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_data = ctcp;
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ctdb->methods = &ctdb_tcp_methods;
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return 0;
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}
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