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testquorum.c
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testquorum.c
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/*
* Copyright (c) 2008, 2009 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Christine Caulfield (ccaulfie@redhat.com)
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Red Hat, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <pwd.h>
#include <grp.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sched.h>
#include <time.h>
#include <corosync/corotypes.h>
#include <corosync/coroipc_types.h>
#include <corosync/corodefs.h>
#include <corosync/engine/logsys.h>
#include <corosync/mar_gen.h>
#include <corosync/lcr/lcr_comp.h>
#include <corosync/engine/coroapi.h>
#include <corosync/engine/quorum.h>
LOGSYS_DECLARE_SUBSYS ("TEST");
static void test_init(struct corosync_api_v1 *api, quorum_set_quorate_fn_t report);
/*
* lcrso object definition
*/
static struct quorum_services_api_ver1 test_quorum_iface_ver0 = {
.init = test_init
};
static struct lcr_iface corosync_test_quorum_ver0[1] = {
{
.name = "testquorum",
.version = 0,
.versions_replace = 0,
.versions_replace_count = 0,
.dependencies = 0,
.dependency_count = 0,
.constructor = NULL,
.destructor = NULL,
.interfaces = (void **)(void *)&test_quorum_iface_ver0,
},
};
static struct lcr_comp test_quorum_comp_ver0 = {
.iface_count = 1,
.ifaces = corosync_test_quorum_ver0
};
#ifdef COROSYNC_SOLARIS
void corosync_lcr_component_register (void);
void corosync_lcr_component_register (void) {
logsys_subsys_init();
#else
__attribute__ ((constructor)) static void corosync_lcr_component_register (void) {
#endif
lcr_interfaces_set (&corosync_test_quorum_ver0[0], &test_quorum_iface_ver0);
lcr_component_register (&test_quorum_comp_ver0);
}
/* -------------------------------------------------- */
static quorum_set_quorate_fn_t set_quorum;
static void key_change_notify(object_change_type_t change_type,
hdb_handle_t parent_object_handle,
hdb_handle_t object_handle,
const void *object_name_pt, size_t object_name_len,
const void *key_name_pt, size_t key_len,
const void *key_value_pt, size_t key_value_len,
void *priv_data_pt)
{
unsigned int members[1];
struct memb_ring_id ring_id;
memset(&ring_id, 0, sizeof(ring_id));
/* If the 'quorum.quorate' key changes, then that changes quorum */
if (strncmp(key_name_pt, "quorate", key_len) == 0) {
set_quorum(members, 0, atoi(key_value_pt), &ring_id);
}
}
static void quorum_callback(int quorate, void *context)
{
log_printf(LOGSYS_LEVEL_DEBUG, "quorum callback: quorate = %d\n", quorate);
}
static void test_init(struct corosync_api_v1 *api,
quorum_set_quorate_fn_t report)
{
hdb_handle_t find_handle;
hdb_handle_t quorum_handle = 0;
set_quorum = report;
/*
* Register for objdb changes on quorum { }
*/
api->object_find_create(OBJECT_PARENT_HANDLE, "quorum", strlen("quorum"), &find_handle);
api->object_find_next(find_handle, &quorum_handle);
api->object_find_destroy(find_handle);
api->object_track_start(quorum_handle,
1,
key_change_notify,
NULL, // object_create_notify
NULL, // object_destroy_notify
NULL, // object_reload_notify
NULL); // priv_data
/* Register for quorum changes too! */
api->quorum_register_callback(quorum_callback, NULL);
}

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