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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 "replace.h"
#include "system/network.h"
#include <talloc.h>
#include <tdb.h>
#include "lib/util/debug.h"
#include "ctdb_private.h"
#include "common/common.h"
#include "common/logging.h"
#include "common/path.h"
#include "common/tunable.h"
/*
set all tunables to defaults
*/
void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
{
ctdb_tunable_set_defaults(&ctdb->tunable);
}
/*
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;
bool ret;
if (indata.dsize < sizeof(*t) ||
t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_get_tunable\n"));
return -1;
}
name = talloc_strndup(ctdb, (char*)t->name, t->length);
CTDB_NO_MEMORY(ctdb, name);
ret = ctdb_tunable_get_value(&ctdb->tunable, name, &val);
talloc_free(name);
if (! ret) {
return -EINVAL;
}
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_tunable_old *t =
(struct ctdb_tunable_old *)indata.dptr;
char *name;
int ret;
bool obsolete;
if (indata.dsize < sizeof(*t) ||
t->length > indata.dsize - offsetof(struct ctdb_tunable_old, name)) {
DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_set_tunable\n"));
return -1;
}
name = talloc_strndup(ctdb, (char *)t->name, t->length);
CTDB_NO_MEMORY(ctdb, name);
ret = ctdb_tunable_set_value(&ctdb->tunable, name, t->value,
&obsolete);
if (! ret) {
talloc_free(name);
return -1;
}
if (obsolete) {
DEBUG(DEBUG_WARNING,
("Setting obsolete tunable \"%s\"\n", name));
talloc_free(name);
return 1;
}
talloc_free(name);
return 0;
}
/*
list tunables
*/
int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
{
char *list = NULL;
struct ctdb_control_list_tunable *t;
list = ctdb_tunable_names_to_string(outdata);
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;
}
bool ctdb_tunables_load(struct ctdb_context *ctdb)
{
bool status;
TALLOC_CTX *tmp_ctx;
char *file = NULL;
/* Fail by default */
status = false;
tmp_ctx = talloc_new(ctdb);
if (tmp_ctx == NULL) {
DBG_ERR("Memory allocation error\n");
goto done;
}
file = path_etcdir_append(tmp_ctx, "ctdb.tunables");
if (file == NULL) {
D_ERR("Failed to construct path for ctdb.tunables\n");
goto done;
}
status = ctdb_tunable_load_file(tmp_ctx, &ctdb->tunable, file);
/* No need to log error, already logged above */
done:
talloc_free(tmp_ctx);
return status;
}
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