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/*
CTDB cluster config handling
Copyright (C) Martin Schwenke 2018
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 "replace.h"
#include "system/network.h"
#include "lib/util/debug.h"
#include "common/conf.h"
#include "cluster_conf.h"
#define CLUSTER_TRANSPORT_DEFAULT "tcp"
/*
* Ideally this wants to be a void function but it also used directly
* as a validation function
*/
static bool check_static_string_change(const char *key,
const char *old_value,
const char *new_value,
enum conf_update_mode mode)
{
if (mode == CONF_MODE_RELOAD) {
if (old_value == new_value) {
goto done;
}
/*
* At this point old_value or new_value can not both
* NULL, so if one is NULL then they are different
*/
if (old_value == NULL ||
new_value == NULL ||
strcmp(old_value, new_value) != 0) {
D_WARNING("Ignoring update of [%s] -> %s\n",
CLUSTER_CONF_SECTION,
key);
}
}
done:
return true;
}
static bool validate_transport(const char *key,
const char *old_transport,
const char *new_transport,
enum conf_update_mode mode)
{
/* Don't allow "ib" for now. It is broken! */
if (strcmp(new_transport, CLUSTER_TRANSPORT_DEFAULT) != 0) {
D_ERR("Invalid value for [cluster] -> transport = %s\n",
new_transport);
return false;
}
/* This sometimes warns but always returns true */
return check_static_string_change(key,
old_transport,
new_transport,
mode);
}
static bool validate_node_address(const char *key,
const char *old_node_address,
const char *new_node_address,
enum conf_update_mode mode)
{
struct in_addr addr4;
struct in6_addr addr6;
int ret;
if (new_node_address == NULL) {
goto good;
}
ret = inet_pton(AF_INET, new_node_address, &addr4);
if (ret == 1) {
goto good;
}
ret = inet_pton(AF_INET6, new_node_address, &addr6);
if (ret == 1) {
goto good;
}
D_ERR("Invalid value for [cluster] -> node address = %s\n",
new_node_address);
return false;
good:
/* This sometimes warns but always returns true */
return check_static_string_change(key,
old_node_address,
new_node_address,
mode);
}
static bool validate_recovery_lock(const char *key,
const char *old_reclock,
const char *new_reclock,
enum conf_update_mode mode)
{
bool status;
if (new_reclock != NULL) {
D_WARNING("Configuration option [%s] -> %s is deprecated\n",
CLUSTER_CONF_SECTION,
key);
}
status = check_static_string_change(key, old_reclock, new_reclock, mode);
return status;
}
static bool validate_leader_timeout(const char *key,
int old_timeout,
int new_timeout,
enum conf_update_mode mode)
{
if (new_timeout <= 0) {
D_ERR("Invalid value for [cluster] -> leader timeout = %d\n",
new_timeout);
return false;
}
return true;
}
void cluster_conf_init(struct conf_context *conf)
{
conf_define_section(conf, CLUSTER_CONF_SECTION, NULL);
conf_define_string(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_TRANSPORT,
CLUSTER_TRANSPORT_DEFAULT,
validate_transport);
conf_define_string(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_NODE_ADDRESS,
NULL,
validate_node_address);
conf_define_string(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_CLUSTER_LOCK,
NULL,
check_static_string_change);
conf_define_string(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_RECOVERY_LOCK,
NULL,
validate_recovery_lock);
conf_define_integer(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_LEADER_TIMEOUT,
5,
validate_leader_timeout);
conf_define_boolean(conf,
CLUSTER_CONF_SECTION,
CLUSTER_CONF_LEADER_CAPABILITY,
true,
NULL);
}
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