diff options
Diffstat (limited to 'ctdb/server/ctdb_tunables.c')
| -rw-r--r-- | ctdb/server/ctdb_tunables.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/ctdb/server/ctdb_tunables.c b/ctdb/server/ctdb_tunables.c new file mode 100644 index 0000000..0dce656 --- /dev/null +++ b/ctdb/server/ctdb_tunables.c @@ -0,0 +1,170 @@ +/* + 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; +} |