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/*
* QMP commands related to stats
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "sysemu/stats.h"
#include "qapi/qapi-commands-stats.h"
#include "qemu/queue.h"
#include "qapi/error.h"
typedef struct StatsCallbacks {
StatsProvider provider;
StatRetrieveFunc *stats_cb;
SchemaRetrieveFunc *schemas_cb;
QTAILQ_ENTRY(StatsCallbacks) next;
} StatsCallbacks;
static QTAILQ_HEAD(, StatsCallbacks) stats_callbacks =
QTAILQ_HEAD_INITIALIZER(stats_callbacks);
void add_stats_callbacks(StatsProvider provider,
StatRetrieveFunc *stats_fn,
SchemaRetrieveFunc *schemas_fn)
{
StatsCallbacks *entry = g_new(StatsCallbacks, 1);
entry->provider = provider;
entry->stats_cb = stats_fn;
entry->schemas_cb = schemas_fn;
QTAILQ_INSERT_TAIL(&stats_callbacks, entry, next);
}
static bool invoke_stats_cb(StatsCallbacks *entry,
StatsResultList **stats_results,
StatsFilter *filter, StatsRequest *request,
Error **errp)
{
ERRP_GUARD();
strList *targets = NULL;
strList *names = NULL;
if (request) {
if (request->provider != entry->provider) {
return true;
}
if (request->has_names && !request->names) {
return true;
}
names = request->has_names ? request->names : NULL;
}
switch (filter->target) {
case STATS_TARGET_VM:
break;
case STATS_TARGET_VCPU:
if (filter->u.vcpu.has_vcpus) {
if (!filter->u.vcpu.vcpus) {
/* No targets allowed? Return no statistics. */
return true;
}
targets = filter->u.vcpu.vcpus;
}
break;
default:
abort();
}
entry->stats_cb(stats_results, filter->target, names, targets, errp);
if (*errp) {
qapi_free_StatsResultList(*stats_results);
*stats_results = NULL;
return false;
}
return true;
}
StatsResultList *qmp_query_stats(StatsFilter *filter, Error **errp)
{
StatsResultList *stats_results = NULL;
StatsCallbacks *entry;
StatsRequestList *request;
QTAILQ_FOREACH(entry, &stats_callbacks, next) {
if (filter->has_providers) {
for (request = filter->providers; request; request = request->next) {
if (!invoke_stats_cb(entry, &stats_results, filter,
request->value, errp)) {
break;
}
}
} else {
if (!invoke_stats_cb(entry, &stats_results, filter, NULL, errp)) {
break;
}
}
}
return stats_results;
}
StatsSchemaList *qmp_query_stats_schemas(bool has_provider,
StatsProvider provider,
Error **errp)
{
ERRP_GUARD();
StatsSchemaList *stats_results = NULL;
StatsCallbacks *entry;
QTAILQ_FOREACH(entry, &stats_callbacks, next) {
if (!has_provider || provider == entry->provider) {
entry->schemas_cb(&stats_results, errp);
if (*errp) {
qapi_free_StatsSchemaList(stats_results);
return NULL;
}
}
}
return stats_results;
}
void add_stats_entry(StatsResultList **stats_results, StatsProvider provider,
const char *qom_path, StatsList *stats_list)
{
StatsResult *entry = g_new0(StatsResult, 1);
entry->provider = provider;
entry->qom_path = g_strdup(qom_path);
entry->stats = stats_list;
QAPI_LIST_PREPEND(*stats_results, entry);
}
void add_stats_schema(StatsSchemaList **schema_results,
StatsProvider provider, StatsTarget target,
StatsSchemaValueList *stats_list)
{
StatsSchema *entry = g_new0(StatsSchema, 1);
entry->provider = provider;
entry->target = target;
entry->stats = stats_list;
QAPI_LIST_PREPEND(*schema_results, entry);
}
bool apply_str_list_filter(const char *string, strList *list)
{
strList *str_list = NULL;
if (!list) {
return true;
}
for (str_list = list; str_list; str_list = str_list->next) {
if (g_str_equal(string, str_list->value)) {
return true;
}
}
return false;
}
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