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samba-mirror/ctdb/common/tunable.c
Martin Schwenke bcd66e17ee ctdb-common: Add function ctdb_tunable_load_file()
Allows direct loading of tunables from a file.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
2022-04-06 06:34:37 +00:00

402 lines
12 KiB
C

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