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pool.c
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/*
* Copyright (C) 2024 The pgagroal community
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may
* be used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* pgagroal */
#include <pgagroal.h>
#include <logging.h>
#include <network.h>
#include <management.h>
#include <memory.h>
#include <message.h>
#include <pool.h>
#include <prometheus.h>
#include <security.h>
#include <server.h>
#include <tracker.h>
#include <utils.h>
#include <configuration.h>
/* system */
#include <assert.h>
#include <signal.h>
#include <stdatomic.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
static int find_best_rule(char* username, char* database);
static bool remove_connection(char* username, char* database);
static void connection_details(int slot);
static bool do_prefill(char* username, char* database, int size);
int
pgagroal_get_connection(char* username, char* database, bool reuse, bool transaction_mode, int* slot, SSL** ssl)
{
bool do_init;
bool has_lock;
int connections;
signed char not_init;
signed char free;
int server;
int fd;
time_t start_time;
int best_rule;
int retries;
int ret;
struct main_configuration* config;
struct main_prometheus* prometheus;
config = (struct main_configuration*)shmem;
prometheus = (struct main_prometheus*)prometheus_shmem;
pgagroal_prometheus_connection_get();
best_rule = find_best_rule(username, database);
retries = 0;
start_time = time(NULL);
pgagroal_prometheus_connection_awaiting(best_rule);
start:
*slot = -1;
*ssl = NULL;
do_init = false;
has_lock = false;
if (best_rule >= 0)
{
connections = atomic_fetch_add(&config->limits[best_rule].active_connections, 1);
if (connections >= config->limits[best_rule].max_size)
{
goto retry;
}
}
connections = atomic_fetch_add(&config->active_connections, 1);
has_lock = true;
if (connections >= config->max_connections)
{
goto retry;
}
/* Try and find an existing free connection */
if (reuse)
{
for (int i = 0; *slot == -1 && i < config->max_connections; i++)
{
free = STATE_FREE;
if (atomic_compare_exchange_strong(&config->states[i], &free, STATE_IN_USE))
{
if (best_rule == config->connections[i].limit_rule &&
!strcmp((const char*)(&config->connections[i].username), username) &&
!strcmp((const char*)(&config->connections[i].database), database))
{
*slot = i;
}
else
{
atomic_store(&config->states[i], STATE_FREE);
}
}
}
}
if (*slot == -1 && !transaction_mode)
{
/* Ok, try and create a new connection */
for (int i = 0; *slot == -1 && i < config->max_connections; i++)
{
not_init = STATE_NOTINIT;
if (atomic_compare_exchange_strong(&config->states[i], ¬_init, STATE_INIT))
{
*slot = i;
do_init = true;
}
}
}
if (*slot != -1)
{
config->connections[*slot].limit_rule = best_rule;
config->connections[*slot].pid = getpid();
if (do_init)
{
/* We need to find the server for the connection */
if (pgagroal_get_primary(&server))
{
config->connections[*slot].limit_rule = -1;
config->connections[*slot].pid = -1;
atomic_store(&config->states[*slot], STATE_NOTINIT);
if (!fork())
{
pgagroal_flush(FLUSH_GRACEFULLY, "*");
}
goto error;
}
pgagroal_log_debug("connect: server %d", server);
if (config->servers[server].host[0] == '/')
{
char pgsql[MISC_LENGTH];
memset(&pgsql, 0, sizeof(pgsql));
snprintf(&pgsql[0], sizeof(pgsql), ".s.PGSQL.%d", config->servers[server].port);
ret = pgagroal_connect_unix_socket(config->servers[server].host, &pgsql[0], &fd);
}
else
{
ret = pgagroal_connect(config->servers[server].host, config->servers[server].port, &fd, config->keep_alive, config->non_blocking, config->nodelay);
}
if (ret)
{
pgagroal_log_error("pgagroal: No connection to %s:%d", config->servers[server].host, config->servers[server].port);
config->connections[*slot].limit_rule = -1;
config->connections[*slot].pid = -1;
atomic_store(&config->states[*slot], STATE_NOTINIT);
pgagroal_prometheus_server_error(server);
if (!fork())
{
pgagroal_flush_server(server);
}
if (config->failover)
{
pgagroal_server_force_failover(server);
pgagroal_prometheus_failed_servers();
goto retry;
}
goto error;
}
pgagroal_log_debug("connect: %s:%d using slot %d fd %d", config->servers[server].host, config->servers[server].port, *slot, fd);
config->connections[*slot].server = server;
memset(&config->connections[*slot].username, 0, MAX_USERNAME_LENGTH);
memcpy(&config->connections[*slot].username, username, MIN(strlen(username), MAX_USERNAME_LENGTH - 1));
memset(&config->connections[*slot].database, 0, MAX_DATABASE_LENGTH);
memcpy(&config->connections[*slot].database, database, MIN(strlen(database), MAX_DATABASE_LENGTH - 1));
config->connections[*slot].has_security = SECURITY_INVALID;
config->connections[*slot].fd = fd;
atomic_store(&config->states[*slot], STATE_IN_USE);
}
else
{
bool kill = false;
/* Verify the socket for the slot */
if (!pgagroal_socket_isvalid(config->connections[*slot].fd))
{
if (!transaction_mode)
{
kill = true;
}
else
{
atomic_store(&config->states[*slot], STATE_FREE);
goto retry;
}
}
if (!kill && config->validation == VALIDATION_FOREGROUND)
{
kill = !pgagroal_connection_isvalid(config->connections[*slot].fd);
}
if (kill)
{
int status;
pgagroal_log_debug("pgagroal_get_connection: Slot %d FD %d - Error", *slot, config->connections[*slot].fd);
pgagroal_tracking_event_slot(TRACKER_BAD_CONNECTION, *slot);
status = pgagroal_kill_connection(*slot, *ssl);
pgagroal_prefill_if_can(true, false);
if (status == 0)
{
goto retry2;
}
else
{
goto timeout;
}
}
}
if (config->connections[*slot].start_time == -1)
{
config->connections[*slot].start_time = time(NULL);
}
config->connections[*slot].timestamp = time(NULL);
if (config->common.metrics > 0)
{
atomic_store(&prometheus->client_wait_time, difftime(time(NULL), start_time));
}
pgagroal_prometheus_connection_success();
pgagroal_tracking_event_slot(TRACKER_GET_CONNECTION_SUCCESS, *slot);
pgagroal_prometheus_connection_unawaiting(best_rule);
return 0;
}
else
{
retry:
if (best_rule >= 0)
{
atomic_fetch_sub(&config->limits[best_rule].active_connections, 1);
}
if (has_lock)
{
atomic_fetch_sub(&config->active_connections, 1);
}
retry2:
if (config->blocking_timeout > 0)
{
/* Sleep for 500ms */
SLEEP(500000000L)
double diff = difftime(time(NULL), start_time);
if (diff >= (double)config->blocking_timeout)
{
goto timeout;
}
if (best_rule == -1)
{
remove_connection(username, database);
}
goto start;
}
else
{
if (!transaction_mode)
{
if (best_rule == -1)
{
if (remove_connection(username, database))
{
if (retries < config->max_retries)
{
retries++;
goto start;
}
}
}
else
{
if (retries < config->max_retries)
{
retries++;
goto start;
}
}
}
else
/* Sleep for 1000 nanos */
{
SLEEP_AND_GOTO(1000L, start)
}
}
}
timeout:
if (config->common.metrics > 0)
{
atomic_store(&prometheus->client_wait_time, difftime(time(NULL), start_time));
}
pgagroal_prometheus_connection_timeout();
pgagroal_tracking_event_basic(TRACKER_GET_CONNECTION_TIMEOUT, username, database);
pgagroal_prometheus_connection_unawaiting(best_rule);
return 1;
error:
if (best_rule >= 0)
{
atomic_fetch_sub(&config->limits[best_rule].active_connections, 1);
}
atomic_fetch_sub(&config->active_connections, 1);
if (config->common.metrics > 0)
{
atomic_store(&prometheus->client_wait_time, difftime(time(NULL), start_time));
}
pgagroal_prometheus_connection_error();
pgagroal_prometheus_connection_unawaiting(best_rule);
pgagroal_tracking_event_basic(TRACKER_GET_CONNECTION_ERROR, username, database);
return 2;
}
int
pgagroal_return_connection(int slot, SSL* ssl, bool transaction_mode)
{
int state;
struct main_configuration* config;
time_t now;
signed char in_use;
signed char age_check;
config = (struct main_configuration*)shmem;
/* Kill the connection, if it lives longer than max_connection_age */
if (config->max_connection_age > 0)
{
now = time(NULL);
in_use = STATE_IN_USE;
age_check = STATE_MAX_CONNECTION_AGE;
if (atomic_compare_exchange_strong(&config->states[slot], &in_use, age_check))
{
double age = difftime(now, config->connections[slot].start_time);
if ((age >= (double) config->max_connection_age && !config->connections[slot].tx_mode) ||
!atomic_compare_exchange_strong(&config->states[slot], &age_check, STATE_IN_USE))
{
pgagroal_prometheus_connection_max_connection_age();
pgagroal_tracking_event_slot(TRACKER_MAX_CONNECTION_AGE, slot);
return pgagroal_kill_connection(slot, ssl);
}
}
}
/* Verify the socket for the slot */
if (!transaction_mode && !pgagroal_socket_isvalid(config->connections[slot].fd))
{
pgagroal_log_debug("pgagroal_return_connection: Slot %d FD %d - Error", slot, config->connections[slot].fd);
config->connections[slot].has_security = SECURITY_INVALID;
}
/* Can we cache this connection ? */
if (config->connections[slot].has_security != SECURITY_INVALID &&
(config->connections[slot].has_security != SECURITY_SCRAM256 ||
(config->connections[slot].has_security == SECURITY_SCRAM256 &&
(config->authquery || pgagroal_user_known(config->connections[slot].username)))) &&
ssl == NULL)
{
state = atomic_load(&config->states[slot]);
/* Return the connection, if not GRACEFULLY */
if (state == STATE_IN_USE)
{
pgagroal_log_debug("pgagroal_return_connection: Slot %d FD %d", slot, config->connections[slot].fd);
if (!transaction_mode)
{
if (pgagroal_write_discard_all(ssl, config->connections[slot].fd))
{
goto kill_connection;
}
}
pgagroal_tracking_event_slot(TRACKER_RETURN_CONNECTION_SUCCESS, slot);
config->connections[slot].timestamp = time(NULL);
if (config->connections[slot].new)
{
pgagroal_management_transfer_connection(slot);
}
pgagroal_management_return_connection(slot);
if (config->connections[slot].limit_rule >= 0)
{
atomic_fetch_sub(&config->limits[config->connections[slot].limit_rule].active_connections, 1);
}
config->connections[slot].new = false;
config->connections[slot].pid = -1;
config->connections[slot].tx_mode = transaction_mode;
memset(&config->connections[slot].appname, 0, sizeof(config->connections[slot].appname));
atomic_store(&config->states[slot], STATE_FREE);
atomic_fetch_sub(&config->active_connections, 1);
pgagroal_prometheus_connection_return();
return 0;
}
else if (state == STATE_GRACEFULLY)
{
pgagroal_write_terminate(ssl, config->connections[slot].fd);
}
}
kill_connection:
pgagroal_tracking_event_slot(TRACKER_RETURN_CONNECTION_KILL, slot);
return pgagroal_kill_connection(slot, ssl);
}
int
pgagroal_kill_connection(int slot, SSL* ssl)
{
SSL_CTX* ctx;
int ssl_shutdown;
int result = 0;
int fd;
struct main_configuration* config;
config = (struct main_configuration*)shmem;
pgagroal_log_debug("pgagroal_kill_connection: Slot %d FD %d State %d PID %d",
slot, config->connections[slot].fd, atomic_load(&config->states[slot]),
config->connections[slot].pid);
pgagroal_tracking_event_slot(TRACKER_KILL_CONNECTION, slot);
fd = config->connections[slot].fd;
if (fd != -1)
{
pgagroal_management_kill_connection(slot, fd);
if (ssl != NULL)
{
ctx = SSL_get_SSL_CTX(ssl);
ssl_shutdown = SSL_shutdown(ssl);
if (ssl_shutdown == 0)
{
SSL_shutdown(ssl);
}
SSL_free(ssl);
SSL_CTX_free(ctx);
}
if (!pgagroal_socket_has_error(fd))
{
pgagroal_disconnect(fd);
}
}
else
{
result = 1;
}
if (config->connections[slot].pid != -1)
{
if (config->connections[slot].limit_rule >= 0)
{
atomic_fetch_sub(&config->limits[config->connections[slot].limit_rule].active_connections, 1);
}
atomic_fetch_sub(&config->active_connections, 1);
}
memset(&config->connections[slot].username, 0, sizeof(config->connections[slot].username));
memset(&config->connections[slot].database, 0, sizeof(config->connections[slot].database));
memset(&config->connections[slot].appname, 0, sizeof(config->connections[slot].appname));
config->connections[slot].new = true;
config->connections[slot].server = -1;
config->connections[slot].tx_mode = false;
config->connections[slot].has_security = SECURITY_INVALID;
for (int i = 0; i < NUMBER_OF_SECURITY_MESSAGES; i++)
{
config->connections[slot].security_lengths[i] = 0;
memset(&config->connections[slot].security_messages[i], 0, SECURITY_BUFFER_SIZE);
}
config->connections[slot].backend_pid = 0;
config->connections[slot].backend_secret = 0;
config->connections[slot].limit_rule = -1;
config->connections[slot].start_time = -1;
config->connections[slot].timestamp = -1;
config->connections[slot].fd = -1;
config->connections[slot].pid = -1;
atomic_store(&config->states[slot], STATE_NOTINIT);
pgagroal_prometheus_connection_kill();
return result;
}
void
pgagroal_idle_timeout(void)
{
bool prefill;
time_t now;
signed char free;
signed char idle_check;
struct main_configuration* config;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
now = time(NULL);
prefill = false;
pgagroal_log_debug("pgagroal_idle_timeout");
/* Here we run backwards in order to keep hot connections in the beginning */
for (int i = config->max_connections - 1; i >= 0; i--)
{
free = STATE_FREE;
idle_check = STATE_IDLE_CHECK;
if (atomic_compare_exchange_strong(&config->states[i], &free, idle_check))
{
double diff = difftime(now, config->connections[i].timestamp);
if (diff >= (double)config->idle_timeout && !config->connections[i].tx_mode)
{
pgagroal_prometheus_connection_idletimeout();
pgagroal_tracking_event_slot(TRACKER_IDLE_TIMEOUT, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
else
{
if (!atomic_compare_exchange_strong(&config->states[i], &idle_check, STATE_FREE))
{
pgagroal_prometheus_connection_idletimeout();
pgagroal_tracking_event_slot(TRACKER_IDLE_TIMEOUT, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
}
}
}
if (prefill)
{
pgagroal_prefill_if_can(true, false);
}
pgagroal_pool_status();
pgagroal_memory_destroy();
pgagroal_stop_logging();
exit(0);
}
void
pgagroal_max_connection_age(void)
{
bool prefill;
time_t now;
signed char free;
signed char age_check;
struct main_configuration* config;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
now = time(NULL);
prefill = false;
pgagroal_log_debug("pgagroal_max_connection_age");
/* Here we run backwards in order to keep hot connections in the beginning */
for (int i = config->max_connections - 1; i >= 0; i--)
{
free = STATE_FREE;
age_check = STATE_MAX_CONNECTION_AGE;
if (atomic_compare_exchange_strong(&config->states[i], &free, age_check))
{
double age = difftime(now, config->connections[i].start_time);
if (age >= (double)config->max_connection_age && !config->connections[i].tx_mode)
{
pgagroal_prometheus_connection_max_connection_age();
pgagroal_tracking_event_slot(TRACKER_MAX_CONNECTION_AGE, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
else
{
if (!atomic_compare_exchange_strong(&config->states[i], &age_check, STATE_FREE))
{
pgagroal_prometheus_connection_max_connection_age();
pgagroal_tracking_event_slot(TRACKER_MAX_CONNECTION_AGE, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
}
}
}
if (prefill)
{
pgagroal_prefill_if_can(true, false);
}
pgagroal_pool_status();
pgagroal_memory_destroy();
pgagroal_stop_logging();
exit(0);
}
void
pgagroal_validation(void)
{
bool prefill = true;
time_t now;
signed char free;
signed char validation;
struct main_configuration* config;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
now = time(NULL);
pgagroal_log_debug("pgagroal_validation");
/* We run backwards */
for (int i = config->max_connections - 1; i >= 0; i--)
{
free = STATE_FREE;
validation = STATE_VALIDATION;
if (atomic_compare_exchange_strong(&config->states[i], &free, validation))
{
bool kill = false;
double diff, age;
/* Verify the socket for the slot */
if (!pgagroal_socket_isvalid(config->connections[i].fd))
{
kill = true;
}
/* While we have the connection in validation may as well check for idle_timeout */
if (!kill && config->idle_timeout > 0)
{
diff = difftime(now, config->connections[i].timestamp);
if (diff >= (double)config->idle_timeout)
{
kill = true;
}
}
/* Also check for max_connection_age */
if (!kill && config->max_connection_age > 0)
{
age = difftime(now, config->connections[i].start_time);
if (age >= (double)config->max_connection_age)
{
kill = true;
}
}
/* Ok, send SELECT 1 */
if (!kill)
{
kill = !pgagroal_connection_isvalid(config->connections[i].fd);
}
if (kill)
{
pgagroal_prometheus_connection_invalid();
pgagroal_tracking_event_slot(TRACKER_INVALID_CONNECTION, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
else
{
if (!atomic_compare_exchange_strong(&config->states[i], &validation, STATE_FREE))
{
pgagroal_prometheus_connection_invalid();
pgagroal_tracking_event_slot(TRACKER_INVALID_CONNECTION, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
}
}
}
if (prefill)
{
pgagroal_prefill_if_can(true, false);
}
pgagroal_pool_status();
pgagroal_memory_destroy();
pgagroal_stop_logging();
exit(0);
}
void
pgagroal_flush(int mode, char* database)
{
bool prefill;
signed char free;
signed char in_use;
bool do_kill;
signed char server_state;
struct main_configuration* config;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
prefill = false;
pgagroal_log_debug("pgagroal_flush");
for (int i = config->max_connections - 1; i >= 0; i--)
{
free = STATE_FREE;
in_use = STATE_IN_USE;
do_kill = false;
if (config->connections[i].server != -1)
{
server_state = atomic_load(&config->servers[config->connections[i].server].state);
if (server_state == SERVER_FAILED)
{
do_kill = true;
}
}
if (!do_kill)
{
bool consider = false;
if (!strcmp(database, "*") || !strcmp(config->connections[i].database, database))
{
consider = true;
}
if (consider)
{
if (atomic_compare_exchange_strong(&config->states[i], &free, STATE_FLUSH))
{
if (pgagroal_socket_isvalid(config->connections[i].fd))
{
pgagroal_write_terminate(NULL, config->connections[i].fd);
}
pgagroal_prometheus_connection_flush();
pgagroal_tracking_event_slot(TRACKER_FLUSH, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
else if (mode == FLUSH_ALL || mode == FLUSH_GRACEFULLY)
{
if (atomic_compare_exchange_strong(&config->states[i], &in_use, STATE_FLUSH))
{
if (mode == FLUSH_ALL)
{
kill(config->connections[i].pid, SIGQUIT);
pgagroal_prometheus_connection_flush();
pgagroal_tracking_event_slot(TRACKER_FLUSH, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
}
else if (mode == FLUSH_GRACEFULLY)
{
atomic_store(&config->states[i], STATE_GRACEFULLY);
}
}
}
}
}
else
{
switch (atomic_load(&config->states[i]))
{
case STATE_NOTINIT:
case STATE_INIT:
/* Do nothing */
break;
case STATE_FREE:
atomic_store(&config->states[i], STATE_GRACEFULLY);
pgagroal_prometheus_connection_flush();
pgagroal_tracking_event_slot(TRACKER_FLUSH, i);
pgagroal_kill_connection(i, NULL);
prefill = true;
break;
case STATE_IN_USE:
case STATE_GRACEFULLY:
case STATE_FLUSH:
atomic_store(&config->states[i], STATE_GRACEFULLY);
break;
case STATE_IDLE_CHECK:
case STATE_MAX_CONNECTION_AGE:
case STATE_VALIDATION:
case STATE_REMOVE:
atomic_store(&config->states[i], STATE_GRACEFULLY);
break;
default:
break;
}
}
}
if (prefill)
{
pgagroal_prefill_if_can(true, false);
}
pgagroal_pool_status();
pgagroal_memory_destroy();
pgagroal_stop_logging();
exit(0);
}
void
pgagroal_flush_server(signed char server)
{
struct main_configuration* config;
int primary = -1;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
pgagroal_log_debug("pgagroal_flush_server %s", config->servers[server].name);
for (int i = 0; i < config->max_connections; i++)
{
if (config->connections[i].server == server)
{
switch (atomic_load(&config->states[i]))
{
case STATE_NOTINIT:
case STATE_INIT:
/* Do nothing */
break;
case STATE_FREE:
atomic_store(&config->states[i], STATE_GRACEFULLY);
if (pgagroal_socket_isvalid(config->connections[i].fd))
{
pgagroal_write_terminate(NULL, config->connections[i].fd);
}
pgagroal_prometheus_connection_flush();
pgagroal_tracking_event_slot(TRACKER_FLUSH, i);
pgagroal_kill_connection(i, NULL);
break;
case STATE_IN_USE:
case STATE_GRACEFULLY:
case STATE_FLUSH:
atomic_store(&config->states[i], STATE_GRACEFULLY);
break;
case STATE_IDLE_CHECK:
case STATE_MAX_CONNECTION_AGE:
case STATE_VALIDATION:
case STATE_REMOVE:
atomic_store(&config->states[i], STATE_GRACEFULLY);
break;
default:
break;
}
}
}
if (pgagroal_get_primary(&primary))
{
pgagroal_log_debug("No primary defined");
}
else
{
if (server != (unsigned char)primary && primary != -1)
{
pgagroal_prefill_if_can(true, true);
}
}
pgagroal_pool_status();
pgagroal_memory_destroy();
pgagroal_stop_logging();
exit(0);
}
void
pgagroal_prefill(bool initial)
{
struct main_configuration* config;
pgagroal_start_logging();
pgagroal_memory_init();
config = (struct main_configuration*)shmem;
pgagroal_log_debug("pgagroal_prefill");
for (int i = 0; i < config->number_of_limits; i++)
{
int size;
if (initial)
{
size = config->limits[i].initial_size;
}
else
{
size = config->limits[i].min_size;
}
if (size > 0)
{
if (strcmp("all", config->limits[i].database) && strcmp("all", config->limits[i].username))
{
int user = -1;
for (int j = 0; j < config->number_of_users && user == -1; j++)
{
if (!strcmp(config->limits[i].username, config->users[j].username))
{
user = j;
}
}
if (user != -1)
{
while (do_prefill(config->users[user].username, config->limits[i].database, size))
{
int32_t slot = -1;