ctdb/server/ctdb_tunables.c

   1 /*
   2    ctdb tunables code
   3
   4    Copyright (C) Andrew Tridgell  2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include "includes.h"
  20 #include "../include/ctdb_private.h"
  21
  22 static const struct {
  23         const char *name;
  24         uint32_t default_v;
  25         size_t offset;
  26         bool obsolete;
  27 } tunable_map[] = {
  28         { "MaxRedirectCount",     3,  offsetof(struct ctdb_tunable, max_redirect_count), false },
  29         { "SeqnumInterval",      1000,  offsetof(struct ctdb_tunable, seqnum_interval), false },
  30         { "ControlTimeout",      60, offsetof(struct ctdb_tunable, control_timeout), false },
  31         { "TraverseTimeout",     20, offsetof(struct ctdb_tunable, traverse_timeout), false },
  32         { "KeepaliveInterval",    5,  offsetof(struct ctdb_tunable, keepalive_interval), false },
  33         { "KeepaliveLimit",       5,  offsetof(struct ctdb_tunable, keepalive_limit), false },
  34         { "RecoverTimeout",     120,  offsetof(struct ctdb_tunable, recover_timeout), false },
  35         { "RecoverInterval",      1,  offsetof(struct ctdb_tunable, recover_interval), false },
  36         { "ElectionTimeout",      3,  offsetof(struct ctdb_tunable, election_timeout), false },
  37         { "TakeoverTimeout",      9,  offsetof(struct ctdb_tunable, takeover_timeout), false },
  38         { "MonitorInterval",     15,  offsetof(struct ctdb_tunable, monitor_interval), false },
  39         { "TickleUpdateInterval",20,  offsetof(struct ctdb_tunable, tickle_update_interval), false },
  40         { "EventScriptTimeout",  30,  offsetof(struct ctdb_tunable, script_timeout), false },
  41         { "EventScriptTimeoutCount", 20,  offsetof(struct ctdb_tunable, script_timeout_count), false },
  42         { "EventScriptUnhealthyOnTimeout", 0, offsetof(struct ctdb_tunable, script_unhealthy_on_timeout), true },
  43         { "RecoveryGracePeriod", 120,  offsetof(struct ctdb_tunable, recovery_grace_period), false },
  44         { "RecoveryBanPeriod",  300,  offsetof(struct ctdb_tunable, recovery_ban_period), false },
  45         { "DatabaseHashSize", 100001, offsetof(struct ctdb_tunable, database_hash_size), false },
  46         { "DatabaseMaxDead",      5,  offsetof(struct ctdb_tunable, database_max_dead), false },
  47         { "RerecoveryTimeout",   10,  offsetof(struct ctdb_tunable, rerecovery_timeout), false },
  48         { "EnableBans",           1,  offsetof(struct ctdb_tunable, enable_bans), false },
  49         { "DeterministicIPs",     0,  offsetof(struct ctdb_tunable, deterministic_public_ips), false },
  50         { "LCP2PublicIPs",        1,  offsetof(struct ctdb_tunable, lcp2_public_ip_assignment), false },
  51         { "ReclockPingPeriod",   60,  offsetof(struct ctdb_tunable,  reclock_ping_period), false },
  52         { "NoIPFailback",         0,  offsetof(struct ctdb_tunable, no_ip_failback), false },
  53         { "DisableIPFailover",    0,  offsetof(struct ctdb_tunable, disable_ip_failover), false },
  54         { "VerboseMemoryNames",   0,  offsetof(struct ctdb_tunable, verbose_memory_names), false },
  55         { "RecdPingTimeout",     60,  offsetof(struct ctdb_tunable, recd_ping_timeout), false },
  56         { "RecdFailCount",       10,  offsetof(struct ctdb_tunable, recd_ping_failcount), false },
  57         { "LogLatencyMs",         0,  offsetof(struct ctdb_tunable, log_latency_ms), false },
  58         { "RecLockLatencyMs",  1000,  offsetof(struct ctdb_tunable, reclock_latency_ms), false },
  59         { "RecoveryDropAllIPs", 120,  offsetof(struct ctdb_tunable, recovery_drop_all_ips), false },
  60         { "VerifyRecoveryLock",   1,  offsetof(struct ctdb_tunable, verify_recovery_lock), false },
  61         { "VacuumInterval",   10,  offsetof(struct ctdb_tunable, vacuum_interval), false },
  62         { "VacuumMaxRunTime",     120,  offsetof(struct ctdb_tunable, vacuum_max_run_time), false },
  63         { "RepackLimit",      10000,  offsetof(struct ctdb_tunable, repack_limit), false },
  64         { "VacuumLimit",       5000,  offsetof(struct ctdb_tunable, vacuum_limit), false },
  65         { "VacuumFastPathCount", 60, offsetof(struct ctdb_tunable, vacuum_fast_path_count), false },
  66         { "MaxQueueDropMsg",  1000000, offsetof(struct ctdb_tunable, max_queue_depth_drop_msg), false },
  67         { "UseStatusEvents",     0,  offsetof(struct ctdb_tunable, use_status_events_for_monitoring), false },
  68         { "AllowUnhealthyDBRead", 0,  offsetof(struct ctdb_tunable, allow_unhealthy_db_read), false },
  69         { "StatHistoryInterval",  1,  offsetof(struct ctdb_tunable, stat_history_interval), false },
  70         { "DeferredAttachTO",  120,  offsetof(struct ctdb_tunable, deferred_attach_timeout), false },
  71         { "AllowClientDBAttach", 1, offsetof(struct ctdb_tunable, allow_client_db_attach), false },
  72         { "RecoverPDBBySeqNum",  1, offsetof(struct ctdb_tunable, recover_pdb_by_seqnum), false },
  73         { "DeferredRebalanceOnNodeAdd", 300, offsetof(struct ctdb_tunable, deferred_rebalance_on_node_add) },
  74         { "FetchCollapse",       1, offsetof(struct ctdb_tunable, fetch_collapse) },
  75         { "HopcountMakeSticky",   50,  offsetof(struct ctdb_tunable, hopcount_make_sticky) },
  76         { "StickyDuration",      600,  offsetof(struct ctdb_tunable, sticky_duration) },
  77         { "StickyPindown",       200,  offsetof(struct ctdb_tunable, sticky_pindown) },
  78         { "NoIPTakeover",         0,  offsetof(struct ctdb_tunable, no_ip_takeover), false },
  79         { "DBRecordCountWarn",    100000,  offsetof(struct ctdb_tunable, db_record_count_warn), false },
  80         { "DBRecordSizeWarn",   10000000,  offsetof(struct ctdb_tunable, db_record_size_warn), false },
  81         { "DBSizeWarn",        100000000,  offsetof(struct ctdb_tunable, db_size_warn), false },
  82         { "PullDBPreallocation", 10*1024*1024,  offsetof(struct ctdb_tunable, pulldb_preallocation_size), false },
  83         { "NoIPHostOnAllDisabled",    0,  offsetof(struct ctdb_tunable, no_ip_host_on_all_disabled), false },
  84         { "Samba3AvoidDeadlocks", 0, offsetof(struct ctdb_tunable, samba3_hack), false },
  85         { "TDBMutexEnabled", 0, offsetof(struct ctdb_tunable, mutex_enabled), false },
  86         { "LockProcessesPerDB", 200, offsetof(struct ctdb_tunable, lock_processes_per_db), false },
  87 };
  88
  89 /*
  90   set all tunables to defaults
  91  */
  92 void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
  93 {
  94         int i;
  95         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
  96                 *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = tunable_map[i].default_v;
  97         }
  98 }
  99
 100
 101 /*
 102   get a tunable
 103  */
 104 int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
 105                                  TDB_DATA *outdata)
 106 {
 107         struct ctdb_control_get_tunable *t =
 108                 (struct ctdb_control_get_tunable *)indata.dptr;
 109         char *name;
 110         uint32_t val;
 111         int i;
 112
 113         if (indata.dsize < sizeof(*t) ||
 114             t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
 115                 DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_get_tunable\n"));
 116                 return -1;
 117         }
 118
 119         name = talloc_strndup(ctdb, (char*)t->name, t->length);
 120         CTDB_NO_MEMORY(ctdb, name);
 121
 122         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
 123                 if (strcasecmp(name, tunable_map[i].name) == 0) break;
 124         }
 125         talloc_free(name);
 126
 127         if (i == ARRAY_SIZE(tunable_map)) {
 128                 return -EINVAL;
 129         }
 130
 131         val = *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable);
 132
 133         outdata->dptr = (uint8_t *)talloc(outdata, uint32_t);
 134         CTDB_NO_MEMORY(ctdb, outdata->dptr);
 135
 136         *(uint32_t *)outdata->dptr = val;
 137         outdata->dsize = sizeof(uint32_t);
 138
 139         return 0;
 140 }
 141
 142
 143 /*
 144   set a tunable
 145  */
 146 int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata)
 147 {
 148         struct ctdb_control_set_tunable *t =
 149                 (struct ctdb_control_set_tunable *)indata.dptr;
 150         char *name;
 151         int i;
 152
 153         if (indata.dsize < sizeof(*t) ||
 154             t->length > indata.dsize - offsetof(struct ctdb_control_set_tunable, name)) {
 155                 DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_set_tunable\n"));
 156                 return -1;
 157         }
 158
 159         name = talloc_strndup(ctdb, (char *)t->name, t->length);
 160         CTDB_NO_MEMORY(ctdb, name);
 161
 162         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
 163                 if (strcasecmp(name, tunable_map[i].name) == 0) break;
 164         }
 165
 166         if (!strcmp(name, "VerifyRecoveryLock") && t->value != 0
 167         && ctdb->recovery_lock_file == NULL) {
 168                 DEBUG(DEBUG_ERR,("Can not activate tunable \"VerifyRecoveryLock\" since there is no recovery lock file set.\n"));
 169                 talloc_free(name);
 170                 return -1;
 171         }
 172
 173         talloc_free(name);
 174
 175         if (i == ARRAY_SIZE(tunable_map)) {
 176                 return -1;
 177         }
 178
 179         *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = t->value;
 180
 181         return 0;
 182 }
 183
 184 /*
 185   list tunables
 186  */
 187 int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
 188 {
 189         char *list = NULL;
 190         int i;
 191         struct ctdb_control_list_tunable *t;
 192
 193         list = talloc_strdup(outdata, tunable_map[0].name);
 194         CTDB_NO_MEMORY(ctdb, list);
 195
 196         for (i=1;i<ARRAY_SIZE(tunable_map);i++) {
 197                 if (tunable_map[i].obsolete) {
 198                         continue;
 199                 }
 200                 list = talloc_asprintf_append(list, ":%s", tunable_map[i].name);
 201                 CTDB_NO_MEMORY(ctdb, list);
 202         }
 203
 204         outdata->dsize = offsetof(struct ctdb_control_list_tunable, data) +
 205                 strlen(list) + 1;
 206         outdata->dptr = talloc_size(outdata, outdata->dsize);
 207         CTDB_NO_MEMORY(ctdb, outdata->dptr);
 208
 209         t = (struct ctdb_control_list_tunable *)outdata->dptr;
 210         t->length = strlen(list)+1;
 211
 212         memcpy(t->data, list, t->length);
 213         talloc_free(list);
 214
 215         return 0;
 216 }