mirror of
https://github.com/samba-team/samba.git
synced 2024-12-30 13:18:05 +03:00
4392591555
Signed-off-by: Amitay Isaacs <amitay@gmail.com> (This used to be ctdb commit 0681014ca5ed2a9b56f63fdace7f894beccf8a9a)
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
|
|
monitoring links to all other nodes to detect dead nodes
|
|
|
|
|
|
Copyright (C) Ronnie Sahlberg 2007
|
|
|
|
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 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/>.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "system/filesys.h"
|
|
#include "system/wait.h"
|
|
#include "../include/ctdb_private.h"
|
|
|
|
|
|
/*
|
|
see if any nodes are dead
|
|
*/
|
|
static void ctdb_check_for_dead_nodes(struct event_context *ev, struct timed_event *te,
|
|
struct timeval t, void *private_data)
|
|
{
|
|
struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
|
|
int i;
|
|
|
|
/* send a keepalive to all other nodes, unless */
|
|
for (i=0;i<ctdb->num_nodes;i++) {
|
|
struct ctdb_node *node = ctdb->nodes[i];
|
|
|
|
if (node->flags & NODE_FLAGS_DELETED) {
|
|
continue;
|
|
}
|
|
|
|
if (node->pnn == ctdb->pnn) {
|
|
continue;
|
|
}
|
|
|
|
if (node->flags & NODE_FLAGS_DISCONNECTED) {
|
|
/* it might have come alive again */
|
|
if (node->rx_cnt != 0) {
|
|
ctdb_node_connected(node);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
|
|
if (node->rx_cnt == 0) {
|
|
node->dead_count++;
|
|
} else {
|
|
node->dead_count = 0;
|
|
}
|
|
|
|
node->rx_cnt = 0;
|
|
|
|
if (node->dead_count >= ctdb->tunable.keepalive_limit) {
|
|
DEBUG(DEBUG_NOTICE,("dead count reached for node %u\n", node->pnn));
|
|
ctdb_node_dead(node);
|
|
ctdb_send_keepalive(ctdb, node->pnn);
|
|
/* maybe tell the transport layer to kill the
|
|
sockets as well?
|
|
*/
|
|
continue;
|
|
}
|
|
|
|
DEBUG(DEBUG_DEBUG,("sending keepalive to %u\n", node->pnn));
|
|
ctdb_send_keepalive(ctdb, node->pnn);
|
|
|
|
node->tx_cnt = 0;
|
|
}
|
|
|
|
event_add_timed(ctdb->ev, ctdb->keepalive_ctx,
|
|
timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
|
|
ctdb_check_for_dead_nodes, ctdb);
|
|
}
|
|
|
|
|
|
void ctdb_start_keepalive(struct ctdb_context *ctdb)
|
|
{
|
|
struct timed_event *te;
|
|
|
|
ctdb->keepalive_ctx = talloc_new(ctdb);
|
|
CTDB_NO_MEMORY_FATAL(ctdb, ctdb->keepalive_ctx);
|
|
|
|
te = event_add_timed(ctdb->ev, ctdb->keepalive_ctx,
|
|
timeval_current_ofs(ctdb->tunable.keepalive_interval, 0),
|
|
ctdb_check_for_dead_nodes, ctdb);
|
|
CTDB_NO_MEMORY_FATAL(ctdb, te);
|
|
|
|
DEBUG(DEBUG_NOTICE,("Keepalive monitoring has been started\n"));
|
|
}
|
|
|
|
void ctdb_stop_keepalive(struct ctdb_context *ctdb)
|
|
{
|
|
talloc_free(ctdb->keepalive_ctx);
|
|
ctdb->keepalive_ctx = NULL;
|
|
}
|
|
|