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// SPDX-License-Identifier: GPL-3.0-or-later
#include "exporting_engine.h"
/**
* Normalize chart and dimension names
*
* Substitute '_' for any special character except '.'.
*
* @param dst where to copy name to.
* @param src where to copy name from.
* @param max_len the maximum size of copied name.
* @return Returns the size of the copied name.
*/
size_t exporting_name_copy(char *dst, const char *src, size_t max_len)
{
size_t n;
for (n = 0; *src && n < max_len; dst++, src++, n++) {
char c = *src;
if (c != '.' && !isalnum(c))
*dst = '_';
else
*dst = c;
}
*dst = '\0';
return n;
}
/**
* Mark scheduled instances
*
* Any instance can have its own update interval. On every exporting engine update only those instances are picked,
* which are scheduled for the update.
*
* @param engine an engine data structure.
* @return Returns 1 if there are instances to process
*/
int mark_scheduled_instances(struct engine *engine)
{
int instances_were_scheduled = 0;
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
if (engine->now % instance->config.update_every < localhost->rrd_update_every) {
instance->scheduled = 1;
instances_were_scheduled = 1;
instance->before = engine->now;
}
}
return instances_were_scheduled;
}
/**
* Calculate the SUM or AVERAGE of a dimension, for any timeframe
*
* May return NAN if the database does not have any value in the give timeframe.
*
* @param instance an instance data structure.
* @param rd a dimension(metric) in the Netdata database.
* @param last_timestamp the timestamp that should be reported to the exporting connector instance.
* @return Returns the value, calculated over the given period.
*/
calculated_number exporting_calculate_value_from_stored_data(
struct instance *instance,
RRDDIM *rd,
time_t *last_timestamp)
{
RRDSET *st = rd->rrdset;
RRDHOST *host = st->rrdhost;
time_t after = instance->after;
time_t before = instance->before;
// find the edges of the rrd database for this chart
time_t first_t = rd->state->query_ops.oldest_time(rd);
time_t last_t = rd->state->query_ops.latest_time(rd);
time_t update_every = st->update_every;
struct rrddim_query_handle handle;
storage_number n;
// step back a little, to make sure we have complete data collection
// for all metrics
after -= update_every * 2;
before -= update_every * 2;
// align the time-frame
after = after - (after % update_every);
before = before - (before % update_every);
// for before, loose another iteration
// the latest point will be reported the next time
before -= update_every;
if (unlikely(after > before))
// this can happen when update_every > before - after
after = before;
if (unlikely(after < first_t))
after = first_t;
if (unlikely(before > last_t))
before = last_t;
if (unlikely(before < first_t || after > last_t)) {
// the chart has not been updated in the wanted timeframe
debug(
D_BACKEND,
"EXPORTING: %s.%s.%s: aligned timeframe %lu to %lu is outside the chart's database range %lu to %lu",
host->hostname,
st->id,
rd->id,
(unsigned long)after,
(unsigned long)before,
(unsigned long)first_t,
(unsigned long)last_t);
return NAN;
}
*last_timestamp = before;
size_t counter = 0;
calculated_number sum = 0;
for (rd->state->query_ops.init(rd, &handle, after, before); !rd->state->query_ops.is_finished(&handle);) {
time_t curr_t;
n = rd->state->query_ops.next_metric(&handle, &curr_t);
if (unlikely(!does_storage_number_exist(n))) {
// not collected
continue;
}
calculated_number value = unpack_storage_number(n);
sum += value;
counter++;
}
rd->state->query_ops.finalize(&handle);
if (unlikely(!counter)) {
debug(
D_BACKEND,
"EXPORTING: %s.%s.%s: no values stored in database for range %lu to %lu",
host->hostname,
st->id,
rd->id,
(unsigned long)after,
(unsigned long)before);
return NAN;
}
if (unlikely(EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_SUM))
return sum;
return sum / (calculated_number)counter;
}
/**
* Start batch formatting for every connector instance's buffer
*
* @param engine an engine data structure.
* @return Returns 0 on success, 1 on failure.
*/
int start_batch_formatting(struct engine *engine)
{
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
if (instance->scheduled) {
uv_mutex_lock(&instance->mutex);
if (instance->start_batch_formatting && instance->start_batch_formatting(instance) != 0) {
error("EXPORTING: cannot start batch formatting for %s", instance->config.name);
return 1;
}
}
}
return 0;
}
/**
* Start host formatting for every connector instance's buffer
*
* @param engine an engine data structure.
* @param host a data collecting host.
* @return Returns 0 on success, 1 on failure.
*/
int start_host_formatting(struct engine *engine, RRDHOST *host)
{
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
if (instance->scheduled) {
if (rrdhost_is_exportable(instance, host)) {
if (instance->start_host_formatting && instance->start_host_formatting(instance, host) != 0) {
error("EXPORTING: cannot start host formatting for %s", instance->config.name);
return 1;
}
} else {
instance->skip_host = 1;
}
}
}
return 0;
}
/**
* Start chart formatting for every connector instance's buffer
*
* @param engine an engine data structure.
* @param a chart.
* @return Returns 0 on success, 1 on failure.
*/
int start_chart_formatting(struct engine *engine, RRDSET *st)
{
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
if (instance->scheduled && !instance->skip_host) {
if (rrdset_is_exportable(instance, st)) {
if (instance->start_chart_formatting && instance->start_chart_formatting(instance, st) != 0) {
error("EXPORTING: cannot start chart formatting for %s", instance->config.name);
return 1;
}
} else {
instance->skip_chart = 1;
}
}
}
return 0;
}
/**
* Format metric for every connector instance's buffer
*
* @param engine an engine data structure.
* @param rd a dimension(metric) in the Netdata database.
* @return Returns 0 on success, 1 on failure.
*/
int metric_formatting(struct engine *engine, RRDDIM *rd)
{
for (struct instance *instance = engine->instance_root; instance; instance = instance->next) {
if (instance->scheduled && !instance->skip_host && !instance->skip_chart) {
if (instance->metric_formatting && instance->metric_formatting(instance, rd) != 0) {
error("EXPORTING: cannot format metric for %s", instanc
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