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/*
ctdb tunables code
Copyright (C) Andrew Tridgell 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 "../include/ctdb_private.h"
static const struct {
const char *name;
uint32_t default_v;
size_t offset;
} tunable_map[] = {
{ "MaxRedirectCount", 3, offsetof(struct ctdb_tunable, max_redirect_count) },
{ "SeqnumFrequency", 1, offsetof(struct ctdb_tunable, seqnum_frequency) },
{ "ControlTimeout", 60, offsetof(struct ctdb_tunable, control_timeout) },
{ "TraverseTimeout", 20, offsetof(struct ctdb_tunable, traverse_timeout) },
{ "KeepaliveInterval", 2, offsetof(struct ctdb_tunable, keepalive_interval) },
{ "KeepaliveLimit", 5, offsetof(struct ctdb_tunable, keepalive_limit) },
{ "MaxLACount", 7, offsetof(struct ctdb_tunable, max_lacount) },
{ "RecoverTimeout", 5, offsetof(struct ctdb_tunable, recover_timeout) },
{ "RecoverInterval", 1, offsetof(struct ctdb_tunable, recover_interval) },
{ "ElectionTimeout", 3, offsetof(struct ctdb_tunable, election_timeout) },
{ "TakeoverTimeout", 5, offsetof(struct ctdb_tunable, takeover_timeout) },
{ "MonitorInterval", 15, offsetof(struct ctdb_tunable, monitor_interval) },
{ "EventScriptTimeout", 20, offsetof(struct ctdb_tunable, script_timeout) },
{ "RecoveryGracePeriod", 60, offsetof(struct ctdb_tunable, recovery_grace_period) },
{ "RecoveryBanPeriod", 300, offsetof(struct ctdb_tunable, recovery_ban_period) },
{ "DatabaseHashSize", 10000, offsetof(struct ctdb_tunable, database_hash_size) },
{ "RerecoveryTimeout", 10, offsetof(struct ctdb_tunable, rerecovery_timeout) },
};
/*
set all tunables to defaults
*/
void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
{
int i;
for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
*(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = tunable_map[i].default_v;
}
}
/*
get a tunable
*/
int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
TDB_DATA *outdata)
{
struct ctdb_control_get_tunable *t =
(struct ctdb_control_get_tunable *)indata.dptr;
char *name;
uint32_t val;
int i;
if (indata.dsize < sizeof(*t) ||
t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
DEBUG(0,("Bad indata in ctdb_control_get_tunable\n"));
return -1;
}
name = talloc_strndup(ctdb, (char*)t->name, t->length);
CTDB_NO_MEMORY(ctdb, name);
for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
if (strcasecmp(name, tunable_map[i].name) == 0) break;
}
talloc_free(name);
if (i == ARRAY_SIZE(tunable_map)) {
return -1;
}
val = *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable);
outdata->dptr = (uint8_t *)talloc(outdata, uint32_t);
CTDB_NO_MEMORY(ctdb, outdata->dptr);
*(uint32_t *)outdata->dptr = val;
outdata->dsize = sizeof(uint32_t);
return 0;
}
/*
set a tunable
*/
int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata)
{
struct ctdb_control_set_tunable *t =
(struct ctdb_control_set_tunable *)indata.dptr;
char *name;
int i;
if (indata.dsize < sizeof(*t) ||
t->length > indata.dsize - offsetof(struct ctdb_control_set_tunable, name)) {
DEBUG(0,("Bad indata in ctdb_control_set_tunable\n"));
return -1;
}
name = talloc_strndup(ctdb, (char *)t->name, t->length);
CTDB_NO_MEMORY(ctdb, name);
for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
if (strcasecmp(name, tunable_map[i].name) == 0) break;
}
talloc_free(name);
if (i == ARRAY_SIZE(tunable_map)) {
return -1;
}
*(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = t->value;
return 0;
}
/*
list tunables
*/
int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
{
char *list = NULL;
int i;
struct ctdb_control_list_tunable *t;
list = talloc_strdup(outdata, tunable_map[0].name);
CTDB_NO_MEMORY(ctdb, list);
for (i=1;i<ARRAY_SIZE(tunable_map);i++) {
list = talloc_asprintf_append(list, ":%s", tunable_map[i].name);
CTDB_NO_MEMORY(ctdb, list);
}
outdata->dsize = offsetof(struct ctdb_control_list_tunable, data) +
strlen(list) + 1;
outdata->dptr = talloc_size(outdata, outdata->dsize);
CTDB_NO_MEMORY(ctdb, outdata->dptr);
t = (struct ctdb_control_list_tunable *)outdata->dptr;
t->length = strlen(list)+1;
memcpy(t->data, list, t->length);
talloc_free(list);
return 0;
}
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