diff options
Diffstat (limited to 'source4/cluster/ctdb/server/ctdb_tunables.c')
| -rw-r--r-- | source4/cluster/ctdb/server/ctdb_tunables.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/source4/cluster/ctdb/server/ctdb_tunables.c b/source4/cluster/ctdb/server/ctdb_tunables.c new file mode 100644 index 0000000000..491c965656 --- /dev/null +++ b/source4/cluster/ctdb/server/ctdb_tunables.c @@ -0,0 +1,163 @@ +/* + 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; +} |