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 "replace.h"
  20 #include "system/network.h"
  21
  22 #include <talloc.h>
  23 #include <tdb.h>
  24
  25 #include "lib/util/debug.h"
  26
  27 #include "ctdb_private.h"
  28
  29 #include "common/common.h"
  30 #include "common/logging.h"
  31
  32 static const struct {
  33         const char *name;
  34         uint32_t default_v;
  35         size_t offset;
  36         bool obsolete;
  37 } tunable_map[] = {
  38         { "MaxRedirectCount",     3,  offsetof(struct ctdb_tunable_list, max_redirect_count), true },
  39         { "SeqnumInterval",      1000,  offsetof(struct ctdb_tunable_list, seqnum_interval), false },
  40         { "ControlTimeout",      60, offsetof(struct ctdb_tunable_list, control_timeout), false },
  41         { "TraverseTimeout",     20, offsetof(struct ctdb_tunable_list, traverse_timeout), false },
  42         { "KeepaliveInterval",    5,  offsetof(struct ctdb_tunable_list, keepalive_interval), false },
  43         { "KeepaliveLimit",       5,  offsetof(struct ctdb_tunable_list, keepalive_limit), false },
  44         { "RecoverTimeout",     120,  offsetof(struct ctdb_tunable_list, recover_timeout), false },
  45         { "RecoverInterval",      1,  offsetof(struct ctdb_tunable_list, recover_interval), false },
  46         { "ElectionTimeout",      3,  offsetof(struct ctdb_tunable_list, election_timeout), false },
  47         { "TakeoverTimeout",      9,  offsetof(struct ctdb_tunable_list, takeover_timeout), false },
  48         { "MonitorInterval",     15,  offsetof(struct ctdb_tunable_list, monitor_interval), false },
  49         { "TickleUpdateInterval",20,  offsetof(struct ctdb_tunable_list, tickle_update_interval), false },
  50         { "EventScriptTimeout",  30,  offsetof(struct ctdb_tunable_list, script_timeout), false },
  51         { "MonitorTimeoutCount", 20,  offsetof(struct ctdb_tunable_list, monitor_timeout_count), false },
  52         { "EventScriptUnhealthyOnTimeout", 0, offsetof(struct ctdb_tunable_list, script_unhealthy_on_timeout), true },
  53         { "RecoveryGracePeriod", 120,  offsetof(struct ctdb_tunable_list, recovery_grace_period), false },
  54         { "RecoveryBanPeriod",  300,  offsetof(struct ctdb_tunable_list, recovery_ban_period), false },
  55         { "DatabaseHashSize", 100001, offsetof(struct ctdb_tunable_list, database_hash_size), false },
  56         { "DatabaseMaxDead",      5,  offsetof(struct ctdb_tunable_list, database_max_dead), false },
  57         { "RerecoveryTimeout",   10,  offsetof(struct ctdb_tunable_list, rerecovery_timeout), false },
  58         { "EnableBans",           1,  offsetof(struct ctdb_tunable_list, enable_bans), false },
  59         { "DeterministicIPs",     0,  offsetof(struct ctdb_tunable_list, deterministic_public_ips), false },
  60         { "LCP2PublicIPs",        1,  offsetof(struct ctdb_tunable_list, lcp2_public_ip_assignment), false },
  61         { "ReclockPingPeriod",   60,  offsetof(struct ctdb_tunable_list,  reclock_ping_period), true },
  62         { "NoIPFailback",         0,  offsetof(struct ctdb_tunable_list, no_ip_failback), false },
  63         { "DisableIPFailover",    0,  offsetof(struct ctdb_tunable_list, disable_ip_failover), false },
  64         { "VerboseMemoryNames",   0,  offsetof(struct ctdb_tunable_list, verbose_memory_names), false },
  65         { "RecdPingTimeout",     60,  offsetof(struct ctdb_tunable_list, recd_ping_timeout), false },
  66         { "RecdFailCount",       10,  offsetof(struct ctdb_tunable_list, recd_ping_failcount), false },
  67         { "LogLatencyMs",         0,  offsetof(struct ctdb_tunable_list, log_latency_ms), false },
  68         { "RecLockLatencyMs",  1000,  offsetof(struct ctdb_tunable_list, reclock_latency_ms), false },
  69         { "RecoveryDropAllIPs", 120,  offsetof(struct ctdb_tunable_list, recovery_drop_all_ips), false },
  70         { "VerifyRecoveryLock",   1,  offsetof(struct ctdb_tunable_list, verify_recovery_lock), true },
  71         { "VacuumInterval",   10,  offsetof(struct ctdb_tunable_list, vacuum_interval), false },
  72         { "VacuumMaxRunTime",     120,  offsetof(struct ctdb_tunable_list, vacuum_max_run_time), false },
  73         { "RepackLimit",      10000,  offsetof(struct ctdb_tunable_list, repack_limit), false },
  74         { "VacuumLimit",       5000,  offsetof(struct ctdb_tunable_list, vacuum_limit), false },
  75         { "VacuumFastPathCount", 60, offsetof(struct ctdb_tunable_list, vacuum_fast_path_count), false },
  76         { "MaxQueueDropMsg",  1000000, offsetof(struct ctdb_tunable_list, max_queue_depth_drop_msg), false },
  77         { "AllowUnhealthyDBRead", 0,  offsetof(struct ctdb_tunable_list, allow_unhealthy_db_read), false },
  78         { "StatHistoryInterval",  1,  offsetof(struct ctdb_tunable_list, stat_history_interval), false },
  79         { "DeferredAttachTO",  120,  offsetof(struct ctdb_tunable_list, deferred_attach_timeout), false },
  80         { "AllowClientDBAttach", 1, offsetof(struct ctdb_tunable_list, allow_client_db_attach), false },
  81         { "RecoverPDBBySeqNum",  1, offsetof(struct ctdb_tunable_list, recover_pdb_by_seqnum), false },
  82         { "DeferredRebalanceOnNodeAdd", 300, offsetof(struct ctdb_tunable_list, deferred_rebalance_on_node_add), true },
  83         { "FetchCollapse",       1, offsetof(struct ctdb_tunable_list, fetch_collapse), false },
  84         { "HopcountMakeSticky",   50,  offsetof(struct ctdb_tunable_list, hopcount_make_sticky), false },
  85         { "StickyDuration",      600,  offsetof(struct ctdb_tunable_list, sticky_duration), false },
  86         { "StickyPindown",       200,  offsetof(struct ctdb_tunable_list, sticky_pindown), false },
  87         { "NoIPTakeover",         0,  offsetof(struct ctdb_tunable_list, no_ip_takeover), false },
  88         { "DBRecordCountWarn",    100000,  offsetof(struct ctdb_tunable_list, db_record_count_warn), false },
  89         { "DBRecordSizeWarn",   10000000,  offsetof(struct ctdb_tunable_list, db_record_size_warn), false },
  90         { "DBSizeWarn",        100000000,  offsetof(struct ctdb_tunable_list, db_size_warn), false },
  91         { "PullDBPreallocation", 10*1024*1024,  offsetof(struct ctdb_tunable_list, pulldb_preallocation_size), false },
  92         { "NoIPHostOnAllDisabled",    0,  offsetof(struct ctdb_tunable_list, no_ip_host_on_all_disabled), false },
  93         { "Samba3AvoidDeadlocks", 0, offsetof(struct ctdb_tunable_list, samba3_hack), false },
  94         { "TDBMutexEnabled", 0, offsetof(struct ctdb_tunable_list, mutex_enabled), false },
  95         { "LockProcessesPerDB", 200, offsetof(struct ctdb_tunable_list, lock_processes_per_db), false },
  96 };
  97
  98 /*
  99   set all tunables to defaults
 100  */
 101 void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
 102 {
 103         int i;
 104         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
 105                 *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = tunable_map[i].default_v;
 106         }
 107 }
 108
 109
 110 /*
 111   get a tunable
 112  */
 113 int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
 114                                  TDB_DATA *outdata)
 115 {
 116         struct ctdb_control_get_tunable *t =
 117                 (struct ctdb_control_get_tunable *)indata.dptr;
 118         char *name;
 119         uint32_t val;
 120         int i;
 121
 122         if (indata.dsize < sizeof(*t) ||
 123             t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
 124                 DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_get_tunable\n"));
 125                 return -1;
 126         }
 127
 128         name = talloc_strndup(ctdb, (char*)t->name, t->length);
 129         CTDB_NO_MEMORY(ctdb, name);
 130
 131         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
 132                 if (strcasecmp(name, tunable_map[i].name) == 0) break;
 133         }
 134         talloc_free(name);
 135
 136         if (i == ARRAY_SIZE(tunable_map)) {
 137                 return -EINVAL;
 138         }
 139
 140         val = *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable);
 141
 142         outdata->dptr = (uint8_t *)talloc(outdata, uint32_t);
 143         CTDB_NO_MEMORY(ctdb, outdata->dptr);
 144
 145         *(uint32_t *)outdata->dptr = val;
 146         outdata->dsize = sizeof(uint32_t);
 147
 148         return 0;
 149 }
 150
 151
 152 /*
 153   set a tunable
 154  */
 155 int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata)
 156 {
 157         struct ctdb_tunable_old *t =
 158                 (struct ctdb_tunable_old *)indata.dptr;
 159         char *name;
 160         int i;
 161
 162         if (indata.dsize < sizeof(*t) ||
 163             t->length > indata.dsize - offsetof(struct ctdb_tunable_old, name)) {
 164                 DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_set_tunable\n"));
 165                 return -1;
 166         }
 167
 168         name = talloc_strndup(ctdb, (char *)t->name, t->length);
 169         CTDB_NO_MEMORY(ctdb, name);
 170
 171         for (i=0;i<ARRAY_SIZE(tunable_map);i++) {
 172                 if (strcasecmp(name, tunable_map[i].name) == 0) break;
 173         }
 174
 175         talloc_free(name);
 176
 177         if (i == ARRAY_SIZE(tunable_map)) {
 178                 return -1;
 179         }
 180
 181         *(uint32_t *)(tunable_map[i].offset + (uint8_t*)&ctdb->tunable) = t->value;
 182
 183         if (tunable_map[i].obsolete) {
 184                 DEBUG(DEBUG_WARNING,
 185                       ("Setting obsolete tunable \"%s\"\n",
 186                        tunable_map[i].name));
 187                 return 1;
 188         }
 189
 190         return 0;
 191 }
 192
 193 /*
 194   list tunables
 195  */
 196 int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
 197 {
 198         char *list = NULL;
 199         int i;
 200         struct ctdb_control_list_tunable *t;
 201
 202         list = talloc_strdup(outdata, ":");
 203         CTDB_NO_MEMORY(ctdb, list);
 204
 205         for (i=0; i<ARRAY_SIZE(tunable_map); i++) {
 206                 if (tunable_map[i].obsolete) {
 207                         continue;
 208                 }
 209                 list = talloc_asprintf_append(list, "%s:",
 210                                               tunable_map[i].name);
 211                 CTDB_NO_MEMORY(ctdb, list);
 212         }
 213
 214         /* cut the last ':' */
 215         list[strlen(list)-1] = '\0';
 216
 217         outdata->dsize = offsetof(struct ctdb_control_list_tunable, data) +
 218                 strlen(list) + 1;
 219         outdata->dptr = talloc_size(outdata, outdata->dsize);
 220         CTDB_NO_MEMORY(ctdb, outdata->dptr);
 221
 222         t = (struct ctdb_control_list_tunable *)outdata->dptr;
 223         t->length = strlen(list)+1;
 224
 225         memcpy(t->data, list, t->length);
 226         talloc_free(list);
 227
 228         return 0;
 229 }