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bcd66e17ee
Allows direct loading of tunables from a file. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
402 lines
12 KiB
C
402 lines
12 KiB
C
/*
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Tunables utilities
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Copyright (C) Amitay Isaacs 2016
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/filesys.h"
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#include "system/locale.h"
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#include "system/network.h"
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#include <talloc.h>
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#include "lib/util/debug.h"
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#include "lib/util/smb_strtox.h"
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#include "lib/util/tini.h"
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#include "protocol/protocol.h"
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#include "common/tunable.h"
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static struct {
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const char *label;
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uint32_t value;
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bool obsolete;
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size_t offset;
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} tunable_map[] = {
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{ "MaxRedirectCount", 3, true,
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offsetof(struct ctdb_tunable_list, max_redirect_count) },
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{ "SeqnumInterval", 1000, false,
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offsetof(struct ctdb_tunable_list, seqnum_interval) },
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{ "ControlTimeout", 60, false,
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offsetof(struct ctdb_tunable_list, control_timeout) },
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{ "TraverseTimeout", 20, false,
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offsetof(struct ctdb_tunable_list, traverse_timeout) },
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{ "KeepaliveInterval", 5, false,
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offsetof(struct ctdb_tunable_list, keepalive_interval) },
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{ "KeepaliveLimit", 5, false,
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offsetof(struct ctdb_tunable_list, keepalive_limit) },
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{ "RecoverTimeout", 30, false,
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offsetof(struct ctdb_tunable_list, recover_timeout) },
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{ "RecoverInterval", 1, false,
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offsetof(struct ctdb_tunable_list, recover_interval) },
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{ "ElectionTimeout", 3, false,
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offsetof(struct ctdb_tunable_list, election_timeout) },
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{ "TakeoverTimeout", 9, false,
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offsetof(struct ctdb_tunable_list, takeover_timeout) },
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{ "MonitorInterval", 15, false,
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offsetof(struct ctdb_tunable_list, monitor_interval) },
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{ "TickleUpdateInterval", 20, false,
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offsetof(struct ctdb_tunable_list, tickle_update_interval) },
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{ "EventScriptTimeout", 30, false,
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offsetof(struct ctdb_tunable_list, script_timeout) },
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{ "MonitorTimeoutCount", 20, false,
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offsetof(struct ctdb_tunable_list, monitor_timeout_count) },
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{ "EventScriptUnhealthyOnTimeout", 0, true,
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offsetof(struct ctdb_tunable_list, script_unhealthy_on_timeout) },
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{ "RecoveryGracePeriod", 120, false,
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offsetof(struct ctdb_tunable_list, recovery_grace_period) },
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{ "RecoveryBanPeriod", 300, false,
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offsetof(struct ctdb_tunable_list, recovery_ban_period) },
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{ "DatabaseHashSize", 100001, false,
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offsetof(struct ctdb_tunable_list, database_hash_size) },
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{ "DatabaseMaxDead", 5, false,
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offsetof(struct ctdb_tunable_list, database_max_dead) },
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{ "RerecoveryTimeout", 10, false,
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offsetof(struct ctdb_tunable_list, rerecovery_timeout) },
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{ "EnableBans", 1, false,
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offsetof(struct ctdb_tunable_list, enable_bans) },
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{ "DeterministicIPs", 0, true,
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offsetof(struct ctdb_tunable_list, deterministic_public_ips) },
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{ "LCP2PublicIPs", 1, true,
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offsetof(struct ctdb_tunable_list, lcp2_public_ip_assignment) },
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{ "ReclockPingPeriod", 60, true,
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offsetof(struct ctdb_tunable_list, reclock_ping_period) },
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{ "NoIPFailback", 0, false,
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offsetof(struct ctdb_tunable_list, no_ip_failback) },
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{ "DisableIPFailover", 0, true,
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offsetof(struct ctdb_tunable_list, disable_ip_failover) },
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{ "VerboseMemoryNames", 0, false,
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offsetof(struct ctdb_tunable_list, verbose_memory_names) },
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{ "RecdPingTimeout", 60, false,
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offsetof(struct ctdb_tunable_list, recd_ping_timeout) },
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{ "RecdFailCount", 10, false,
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offsetof(struct ctdb_tunable_list, recd_ping_failcount) },
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{ "LogLatencyMs", 0, false,
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offsetof(struct ctdb_tunable_list, log_latency_ms) },
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{ "RecLockLatencyMs", 1000, false,
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offsetof(struct ctdb_tunable_list, reclock_latency_ms) },
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{ "RecoveryDropAllIPs", 120, false,
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offsetof(struct ctdb_tunable_list, recovery_drop_all_ips) },
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{ "VerifyRecoveryLock", 1, true,
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offsetof(struct ctdb_tunable_list, verify_recovery_lock) },
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{ "VacuumInterval", 10, false,
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offsetof(struct ctdb_tunable_list, vacuum_interval) },
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{ "VacuumMaxRunTime", 120, false,
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offsetof(struct ctdb_tunable_list, vacuum_max_run_time) },
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{ "RepackLimit", 10*1000, false,
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offsetof(struct ctdb_tunable_list, repack_limit) },
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{ "VacuumLimit", 5*1000, true,
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offsetof(struct ctdb_tunable_list, vacuum_limit) },
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{ "VacuumFastPathCount", 60, false,
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offsetof(struct ctdb_tunable_list, vacuum_fast_path_count) },
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{ "MaxQueueDropMsg", 1000*1000, false,
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offsetof(struct ctdb_tunable_list, max_queue_depth_drop_msg) },
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{ "AllowUnhealthyDBRead", 0, false,
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offsetof(struct ctdb_tunable_list, allow_unhealthy_db_read) },
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{ "StatHistoryInterval", 1, false,
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offsetof(struct ctdb_tunable_list, stat_history_interval) },
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{ "DeferredAttachTO", 120, false,
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offsetof(struct ctdb_tunable_list, deferred_attach_timeout) },
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{ "AllowClientDBAttach", 1, false,
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offsetof(struct ctdb_tunable_list, allow_client_db_attach) },
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{ "RecoverPDBBySeqNum", 1, true,
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offsetof(struct ctdb_tunable_list, recover_pdb_by_seqnum) },
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{ "DeferredRebalanceOnNodeAdd", 300, true,
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offsetof(struct ctdb_tunable_list, deferred_rebalance_on_node_add) },
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{ "FetchCollapse", 1, false,
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offsetof(struct ctdb_tunable_list, fetch_collapse) },
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{ "HopcountMakeSticky", 50, false,
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offsetof(struct ctdb_tunable_list, hopcount_make_sticky) },
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{ "StickyDuration", 600, false,
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offsetof(struct ctdb_tunable_list, sticky_duration) },
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{ "StickyPindown", 200, false,
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offsetof(struct ctdb_tunable_list, sticky_pindown) },
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{ "NoIPTakeover", 0, false,
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offsetof(struct ctdb_tunable_list, no_ip_takeover) },
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{ "DBRecordCountWarn", 100*1000, false,
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offsetof(struct ctdb_tunable_list, db_record_count_warn) },
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{ "DBRecordSizeWarn", 10*1000*1000, false,
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offsetof(struct ctdb_tunable_list, db_record_size_warn) },
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{ "DBSizeWarn", 100*1000*1000, false,
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offsetof(struct ctdb_tunable_list, db_size_warn) },
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{ "PullDBPreallocation", 10*1024*1024, false,
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offsetof(struct ctdb_tunable_list, pulldb_preallocation_size) },
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{ "NoIPHostOnAllDisabled", 1, true,
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offsetof(struct ctdb_tunable_list, no_ip_host_on_all_disabled) },
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{ "Samba3AvoidDeadlocks", 0, true,
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offsetof(struct ctdb_tunable_list, samba3_hack) },
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{ "TDBMutexEnabled", 1, true,
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offsetof(struct ctdb_tunable_list, mutex_enabled) },
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{ "LockProcessesPerDB", 200, false,
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offsetof(struct ctdb_tunable_list, lock_processes_per_db) },
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{ "RecBufferSizeLimit", 1000*1000, false,
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offsetof(struct ctdb_tunable_list, rec_buffer_size_limit) },
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{ "QueueBufferSize", 1024, false,
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offsetof(struct ctdb_tunable_list, queue_buffer_size) },
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{ "IPAllocAlgorithm", 2, false,
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offsetof(struct ctdb_tunable_list, ip_alloc_algorithm) },
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{ "AllowMixedVersions", 0, false,
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offsetof(struct ctdb_tunable_list, allow_mixed_versions) },
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{ .obsolete = true, }
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};
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void ctdb_tunable_set_defaults(struct ctdb_tunable_list *tun_list)
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{
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int i;
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for (i=0; tunable_map[i].label != NULL; i++) {
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size_t offset = tunable_map[i].offset;
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uint32_t value = tunable_map[i].value;
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uint32_t *value_ptr;
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value_ptr = (uint32_t *)((uint8_t *)tun_list + offset);
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*value_ptr = value;
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}
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}
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bool ctdb_tunable_get_value(struct ctdb_tunable_list *tun_list,
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const char *tunable_str, uint32_t *value)
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{
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int i;
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for (i=0; tunable_map[i].label != NULL; i++) {
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if (strcasecmp(tunable_map[i].label, tunable_str) == 0) {
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uint32_t *value_ptr;
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value_ptr = (uint32_t *)((uint8_t *)tun_list +
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tunable_map[i].offset);
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*value = *value_ptr;
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return true;
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}
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}
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return false;
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}
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bool ctdb_tunable_set_value(struct ctdb_tunable_list *tun_list,
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const char *tunable_str, uint32_t value,
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bool *obsolete)
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{
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int i;
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for (i=0; tunable_map[i].label != NULL; i++) {
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if (strcasecmp(tunable_map[i].label, tunable_str) == 0) {
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uint32_t *value_ptr;
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value_ptr = (uint32_t *)((uint8_t *)tun_list +
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tunable_map[i].offset);
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*value_ptr = value;
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if (obsolete != NULL) {
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*obsolete = tunable_map[i].obsolete;
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}
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return true;
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}
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}
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return false;
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}
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struct ctdb_var_list *ctdb_tunable_names(TALLOC_CTX *mem_ctx)
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{
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struct ctdb_var_list *list;
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int i;
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list = talloc_zero(mem_ctx, struct ctdb_var_list);
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if (list == NULL) {
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return NULL;
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}
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for (i=0; tunable_map[i].label != NULL; i++) {
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if (tunable_map[i].obsolete) {
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continue;
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}
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list->var = talloc_realloc(list, list->var, const char *,
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list->count + 1);
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if (list->var == NULL) {
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goto fail;
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}
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list->var[list->count] = talloc_strdup(list,
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tunable_map[i].label);
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if (list->var[list->count] == NULL) {
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goto fail;
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}
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list->count += 1;
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}
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return list;
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fail:
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TALLOC_FREE(list);
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return NULL;
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}
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char *ctdb_tunable_names_to_string(TALLOC_CTX *mem_ctx)
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{
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char *str = NULL;
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int i;
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str = talloc_strdup(mem_ctx, ":");
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if (str == NULL) {
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return NULL;
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}
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for (i=0; tunable_map[i].label != NULL; i++) {
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if (tunable_map[i].obsolete) {
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continue;
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}
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str = talloc_asprintf_append(str, "%s:",
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tunable_map[i].label);
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if (str == NULL) {
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return NULL;
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}
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}
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/* Remove the last ':' */
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str[strlen(str)-1] = '\0';
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return str;
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}
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struct tunable_load_state {
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struct ctdb_tunable_list *tun_list;
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bool status;
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const char *func;
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};
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static bool tunable_section(const char *section, void *private_data)
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{
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struct tunable_load_state *state =
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(struct tunable_load_state *)private_data;
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D_ERR("%s: Invalid line for section [%s] - sections not supported \n",
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state->func,
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section);
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state->status = false;
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return true;
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}
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static bool tunable_option(const char *name,
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const char *value,
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void *private_data)
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{
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struct tunable_load_state *state =
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(struct tunable_load_state *)private_data;
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unsigned long num;
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bool obsolete;
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bool ok;
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int ret;
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if (value[0] == '\0') {
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D_ERR("%s: Invalid line containing \"%s\"\n", state->func, name);
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state->status = false;
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return true;
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}
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num = smb_strtoul(value, NULL, 0, &ret, SMB_STR_FULL_STR_CONV);
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if (ret != 0) {
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D_ERR("%s: Invalid value \"%s\" for tunable \"%s\"\n",
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state->func,
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value,
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name);
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state->status = false;
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return true;
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}
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ok = ctdb_tunable_set_value(state->tun_list,
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name,
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(uint32_t)num,
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&obsolete);
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if (!ok) {
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D_ERR("%s: Unknown tunable \"%s\"\n", state->func, name);
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state->status = false;
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return true;
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}
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if (obsolete) {
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D_ERR("%s: Obsolete tunable \"%s\"\n", state->func, name);
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state->status = false;
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return true;
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}
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return true;
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}
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bool ctdb_tunable_load_file(TALLOC_CTX *mem_ctx,
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struct ctdb_tunable_list *tun_list,
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const char *file)
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{
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struct tunable_load_state state = {
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.tun_list = tun_list,
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.status = true,
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.func = __FUNCTION__,
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};
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FILE *fp;
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bool status;
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ctdb_tunable_set_defaults(tun_list);
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fp = fopen(file, "r");
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if (fp == NULL) {
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if (errno == ENOENT) {
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/* Doesn't need to exist */
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return true;
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}
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DBG_ERR("Failed to open %s\n", file);
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return false;
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}
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D_NOTICE("Loading tunables from %s\n", file);
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/*
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* allow_empty_value=true is somewhat counter-intuitive.
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* However, if allow_empty_value=false then a tunable with no
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* equals or value is regarded as empty and is simply ignored.
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* Use true so an "empty value" can be caught in
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* tunable_option().
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*
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* tunable_section() and tunable_option() return true while
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* setting state.status=false, allowing all possible errors
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* with tunables and values to be reported. This helps to
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* avoid a potential game of whack-a-mole in a well-formed
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* file with multiple minor errors.
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*/
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status = tini_parse(fp, true, tunable_section, tunable_option, &state);
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fclose(fp);
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if (!status) {
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DBG_ERR("Syntax error\n");
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}
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return status && state.status;
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}
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