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// SPDX-License-Identifier: GPL-3.0-or-later
#include "aclk_query_queue.h"
#include "aclk_query.h"
#include "aclk_stats.h"
static netdata_mutex_t aclk_query_queue_mutex = NETDATA_MUTEX_INITIALIZER;
#define ACLK_QUEUE_LOCK netdata_mutex_lock(&aclk_query_queue_mutex)
#define ACLK_QUEUE_UNLOCK netdata_mutex_unlock(&aclk_query_queue_mutex)
static struct aclk_query_queue {
aclk_query_t head;
aclk_query_t tail;
int block_push;
} aclk_query_queue = {
.head = NULL,
.tail = NULL,
.block_push = 0
};
static inline int _aclk_queue_query(aclk_query_t query)
{
now_realtime_timeval(&query->created_tv);
query->created = now_realtime_usec();
ACLK_QUEUE_LOCK;
if (aclk_query_queue.block_push) {
ACLK_QUEUE_UNLOCK;
if(!netdata_exit)
error("Query Queue is blocked from accepting new requests. This is normally the case when ACLK prepares to shutdown.");
aclk_query_free(query);
return 1;
}
if (!aclk_query_queue.head) {
aclk_query_queue.head = query;
aclk_query_queue.tail = query;
ACLK_QUEUE_UNLOCK;
return 0;
}
// TODO deduplication
aclk_query_queue.tail->next = query;
aclk_query_queue.tail = query;
ACLK_QUEUE_UNLOCK;
return 0;
}
// Gets a pointer to the metric associated with a particular query type.
// NULL if the query type has no associated metric.
static inline volatile uint32_t *aclk_stats_qmetric_for_qtype(aclk_query_type_t qtype) {
switch (qtype) {
case HTTP_API_V2:
return &aclk_metrics_per_sample.query_type_http;
case ALARM_STATE_UPDATE:
return &aclk_metrics_per_sample.query_type_alarm_upd;
case METADATA_INFO:
return &aclk_metrics_per_sample.query_type_metadata_info;
case METADATA_ALARMS:
return &aclk_metrics_per_sample.query_type_metadata_alarms;
case CHART_NEW:
return &aclk_metrics_per_sample.query_type_chart_new;
case CHART_DEL:
return &aclk_metrics_per_sample.query_type_chart_del;
case REGISTER_NODE:
return &aclk_metrics_per_sample.query_type_register_node;
case NODE_STATE_UPDATE:
return &aclk_metrics_per_sample.query_type_node_upd;
default:
return NULL;
}
}
int aclk_queue_query(aclk_query_t query)
{
int ret = _aclk_queue_query(query);
if (!ret) {
// local cache of query type before we wake up query thread, which may
// free the query in a race.
aclk_query_type_t qtype = query->type;
QUERY_THREAD_WAKEUP;
if (aclk_stats_enabled) {
// get target query type metric before lock so we keep lock for
// minimal time.
volatile uint32_t *metric = aclk_stats_qmetric_for_qtype(qtype);
ACLK_STATS_LOCK;
aclk_metrics_per_sample.queries_queued++;
if (metric)
*metric += 1;
ACLK_STATS_UNLOCK;
}
}
return ret;
}
aclk_query_t aclk_queue_pop(void)
{
aclk_query_t ret;
ACLK_QUEUE_LOCK;
if (aclk_query_queue.block_push) {
ACLK_QUEUE_UNLOCK;
if(!netdata_exit)
error("POP Query Queue is blocked from accepting new requests. This is normally the case when ACLK prepares to shutdown.");
return NULL;
}
ret = aclk_query_queue.head;
if (!ret) {
ACLK_QUEUE_UNLOCK;
return ret;
}
aclk_query_queue.head = ret->next;
if (unlikely(!aclk_query_queue.head))
aclk_query_queue.tail = aclk_query_queue.head;
ACLK_QUEUE_UNLOCK;
ret->next = NULL;
return ret;
}
void aclk_queue_flush(void)
{
aclk_query_t query = aclk_queue_pop();
while (query) {
aclk_query_free(query);
query = aclk_queue_pop();
};
}
aclk_query_t aclk_query_new(aclk_query_type_t type)
{
aclk_query_t query = callocz(1, sizeof(struct aclk_query));
query->type = type;
return query;
}
void aclk_query_free(aclk_query_t query)
{
switch (query->type) {
case HTTP_API_V2:
freez(query->data.http_api_v2.payload);
if (query->data.http_api_v2.query != query->dedup_id)
freez(query->data.http_api_v2.query);
break;
case CHART_NEW:
freez(query->data.chart_add_del.chart_name);
break;
case ALARM_STATE_UPDATE:
if (query->data.alarm_update)
json_object_put(query->data.alarm_update);
break;
case NODE_STATE_UPDATE:
freez((void*)query->data.node_update.claim_id);
freez((void*)query->data.node_update.node_id);
break;
case REGISTER_NODE:
freez((void*)query->data.node_creation.claim_id);
freez((void*)query->data.node_creation.hostname);
freez((void*)query->data.node_creation.machine_guid);
break;
case CHART_DIMS_UPDATE:
case CHART_CONFIG_UPDATED:
case CHART_RESET:
case RETENTION_UPDATED:
case UPDATE_NODE_INFO:
case ALARM_LOG_HEALTH:
case ALARM_PROVIDE_CFG:
case ALARM_SNAPSHOT:
freez(query->data.bin_payload.payload);
break;
default:
break;
}
freez(query->dedup_id);
freez(query->callback_topic);
freez(query->msg_id);
freez(query);
}
void aclk_queue_lock(void)
{
ACLK_QUEUE_LOCK;
aclk_query_queue.block_push = 1;
ACLK_QUEUE_UNLOCK;
}
void aclk_queue_unlock(void)
{
ACLK_QUEUE_LOCK;
aclk_query_queue.block_push = 0;
ACLK_QUEUE_UNLOCK;
}
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