[dpdk-dev] [PATCH v4 02/18] telemetry: move code to metrics for later reuse

[Ciara Power <ciara.power@intel.com>]

This commit moves some of the telemetry library code to a new file in
the metrics library. No modifications are made to the moved code,
except what is needed to allow it to compile and run. The additional
code in metrics is built only when the Jansson library is  present.
Telemetry functions as normal, using the functions from the
metrics_telemetry file. This move will enable code be reused by the new
version of telemetry in a later commit, to support backward
compatibility with the existing telemetry usage.

Signed-off-by: Ciara Power <ciara.power@intel.com>
---
 lib/Makefile                                  |   2 +-
 lib/librte_metrics/Makefile                   |   9 +
 lib/librte_metrics/meson.build                |   8 +
 lib/librte_metrics/rte_metrics.c              |   1 -
 lib/librte_metrics/rte_metrics.h              |   3 +-
 lib/librte_metrics/rte_metrics_telemetry.c    | 719 ++++++++++++++++++
 lib/librte_metrics/rte_metrics_telemetry.h    |  71 ++
 lib/librte_metrics/rte_metrics_version.map    |   7 +
 lib/librte_telemetry/rte_telemetry.c          | 550 +-------------
 lib/librte_telemetry/rte_telemetry_internal.h |  32 +-
 lib/librte_telemetry/rte_telemetry_parser.c   | 270 +------
 mk/rte.app.mk                                 |   2 +
 12 files changed, 857 insertions(+), 817 deletions(-)
 create mode 100644 lib/librte_metrics/rte_metrics_telemetry.c
 create mode 100644 lib/librte_metrics/rte_metrics_telemetry.h

diff --git a/lib/Makefile b/lib/Makefile
index d0ec3919b0..300ab7d748 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -71,7 +71,7 @@ DEPDIRS-librte_gro := librte_eal librte_mbuf librte_ethdev librte_net
 DIRS-$(CONFIG_RTE_LIBRTE_JOBSTATS) += librte_jobstats
 DEPDIRS-librte_jobstats := librte_eal
 DIRS-$(CONFIG_RTE_LIBRTE_METRICS) += librte_metrics
-DEPDIRS-librte_metrics := librte_eal
+DEPDIRS-librte_metrics := librte_eal librte_ethdev
 DIRS-$(CONFIG_RTE_LIBRTE_BITRATE) += librte_bitratestats
 DEPDIRS-librte_bitratestats := librte_eal librte_metrics librte_ethdev
 DIRS-$(CONFIG_RTE_LIBRTE_LATENCY_STATS) += librte_latencystats
diff --git a/lib/librte_metrics/Makefile b/lib/librte_metrics/Makefile
index 6b385f5cf1..aa4d8546f3 100644
--- a/lib/librte_metrics/Makefile
+++ b/lib/librte_metrics/Makefile
@@ -14,6 +14,15 @@ EXPORT_MAP := rte_metrics_version.map
 # all source are stored in SRCS-y
 SRCS-$(CONFIG_RTE_LIBRTE_METRICS) := rte_metrics.c
 
+ifeq ($(CONFIG_RTE_LIBRTE_TELEMETRY),y)
+SRCS-y += rte_metrics_telemetry.c
+SYMLINK-$(CONFIG_RTE_LIBRTE_METRICS)-include += rte_metrics_telemetry.h
+
+LDLIBS += -lrte_ethdev
+LDLIBS += -ljansson
+
+endif
+
 # Install header file
 SYMLINK-$(CONFIG_RTE_LIBRTE_METRICS)-include += rte_metrics.h
 
diff --git a/lib/librte_metrics/meson.build b/lib/librte_metrics/meson.build
index e26d1f46c1..a39bc7a2a6 100644
--- a/lib/librte_metrics/meson.build
+++ b/lib/librte_metrics/meson.build
@@ -3,3 +3,11 @@
 
 sources = files('rte_metrics.c')
 headers = files('rte_metrics.h')
+
+jansson = dependency('jansson', required: false)
+if jansson.found()
+	ext_deps += jansson
+	sources += files('rte_metrics_telemetry.c')
+	headers = files('rte_metrics_telemetry.h')
+	deps += ['ethdev']
+endif
diff --git a/lib/librte_metrics/rte_metrics.c b/lib/librte_metrics/rte_metrics.c
index df5e32c59f..9b38d7787c 100644
--- a/lib/librte_metrics/rte_metrics.c
+++ b/lib/librte_metrics/rte_metrics.c
@@ -13,7 +13,6 @@
 #include <rte_memzone.h>
 #include <rte_spinlock.h>
 
-#define RTE_METRICS_MAX_METRICS 256
 #define RTE_METRICS_MEMZONE_NAME "RTE_METRICS"
 
 /**
diff --git a/lib/librte_metrics/rte_metrics.h b/lib/librte_metrics/rte_metrics.h
index 77bffe08e4..466ca98c31 100644
--- a/lib/librte_metrics/rte_metrics.h
+++ b/lib/librte_metrics/rte_metrics.h
@@ -32,6 +32,7 @@ extern "C" {
 
 /** Maximum length of metric name (including null-terminator) */
 #define RTE_METRICS_MAX_NAME_LEN 64
+#define RTE_METRICS_MAX_METRICS 256
 
 /**
  * Global metric special id.
@@ -43,7 +44,6 @@ extern "C" {
  */
 #define RTE_METRICS_GLOBAL -1
 
-
 /**
  * A name-key lookup for metrics.
  *
@@ -71,7 +71,6 @@ struct rte_metric_value {
 	uint64_t value;
 };
 
-
 /**
  * Initializes metric module. This function must be called from
  * a primary process before metrics are used.
diff --git a/lib/librte_metrics/rte_metrics_telemetry.c b/lib/librte_metrics/rte_metrics_telemetry.c
new file mode 100644
index 0000000000..a6b2616714
--- /dev/null
+++ b/lib/librte_metrics/rte_metrics_telemetry.c
@@ -0,0 +1,719 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2020 Intel Corporation
+ */
+
+#include <jansson.h>
+
+#include <rte_ethdev.h>
+#include <rte_string_fns.h>
+
+#include "rte_metrics.h"
+#include "rte_metrics_telemetry.h"
+
+int metrics_log_level;
+
+/* Logging Macros */
+#define METRICS_LOG(level, fmt, args...) \
+	rte_log(RTE_LOG_ ##level, metrics_log_level, "%s(): "fmt "\n", \
+		__func__, ##args)
+
+#define METRICS_LOG_ERR(fmt, args...) \
+	METRICS_LOG(ERR, fmt, ## args)
+
+#define METRICS_LOG_WARN(fmt, args...) \
+	METRICS_LOG(WARNING, fmt, ## args)
+
+static int32_t
+rte_metrics_tel_is_port_active(int port_id)
+{
+	int ret;
+
+	ret = rte_eth_find_next(port_id);
+	if (ret == port_id)
+		return 1;
+
+	METRICS_LOG_ERR("port_id: %d is invalid, not active",
+		port_id);
+
+	return 0;
+}
+
+static int32_t
+rte_metrics_tel_reg_port_ethdev_to_metrics(uint16_t port_id)
+{
+	int ret, num_xstats, ret_val, i;
+	struct rte_eth_xstat *eth_xstats = NULL;
+	struct rte_eth_xstat_name *eth_xstats_names = NULL;
+
+	if (!rte_eth_dev_is_valid_port(port_id)) {
+		METRICS_LOG_ERR("port_id: %d is invalid", port_id);
+		return -EINVAL;
+	}
+
+	num_xstats = rte_eth_xstats_get(port_id, NULL, 0);
+	if (num_xstats < 0) {
+		METRICS_LOG_ERR("rte_eth_xstats_get(%u) failed: %d",
+				port_id, num_xstats);
+		return -EPERM;
+	}
+
+	eth_xstats = malloc(sizeof(struct rte_eth_xstat) * num_xstats);
+	if (eth_xstats == NULL) {
+		METRICS_LOG_ERR("Failed to malloc memory for xstats");
+		return -ENOMEM;
+	}
+
+	ret = rte_eth_xstats_get(port_id, eth_xstats, num_xstats);
+	const char *xstats_names[num_xstats];
+	eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name)
+			* num_xstats);
+	if (ret < 0 || ret > num_xstats) {
+		METRICS_LOG_ERR("rte_eth_xstats_get(%u) len%i failed: %d",
+				port_id, num_xstats, ret);
+		ret_val = -EPERM;
+		goto free_xstats;
+	}
+
+	if (eth_xstats_names == NULL) {
+		METRICS_LOG_ERR("Failed to malloc memory for xstats_names");
+		ret_val = -ENOMEM;
+		goto free_xstats;
+	}
+
+	ret = rte_eth_xstats_get_names(port_id, eth_xstats_names, num_xstats);
+	if (ret < 0 || ret > num_xstats) {
+		METRICS_LOG_ERR("rte_eth_xstats_get_names(%u) len%i failed: %d",
+				port_id, num_xstats, ret);
+		ret_val = -EPERM;
+		goto free_xstats;
+	}
+
+	for (i = 0; i < num_xstats; i++)
+		xstats_names[i] = eth_xstats_names[eth_xstats[i].id].name;
+
+	ret_val = rte_metrics_reg_names(xstats_names, num_xstats);
+	if (ret_val < 0) {
+		METRICS_LOG_ERR("rte_metrics_reg_names failed - metrics may already be registered");
+		ret_val = -1;
+		goto free_xstats;
+	}
+
+	goto free_xstats;
+
+free_xstats:
+	free(eth_xstats);
+	free(eth_xstats_names);
+	return ret_val;
+}
+
+int32_t
+rte_metrics_tel_reg_all_ethdev(int *metrics_register_done, int *reg_index_list)
+{
+	struct driver_index {
+		const void *dev_ops;
+		int reg_index;
+	} drv_idx[RTE_MAX_ETHPORTS] = { {0} };
+	int nb_drv_idx = 0;
+	uint16_t pid;
+	int ret;
+
+	RTE_ETH_FOREACH_DEV(pid) {
+		int i;
+		/* Different device types have different numbers of stats, so
+		 * first check if the stats for this type of device have
+		 * already been registered
+		 */
+		for (i = 0; i < nb_drv_idx; i++) {
+			if (rte_eth_devices[pid].dev_ops ==
+					drv_idx[i].dev_ops) {
+				reg_index_list[pid] = drv_idx[i].reg_index;
+				break;
+			}
+		}
+		if (i < nb_drv_idx)
+			continue; /* we found a match, go to next port */
+
+		/* No match, register a new set of xstats for this port */
+		ret = rte_metrics_tel_reg_port_ethdev_to_metrics(pid);
+		if (ret < 0) {
+			METRICS_LOG_ERR("Failed to register ethdev metrics");
+			return -1;
+		}
+		reg_index_list[pid] = ret;
+		drv_idx[nb_drv_idx].dev_ops = rte_eth_devices[pid].dev_ops;
+		drv_idx[nb_drv_idx].reg_index = ret;
+		nb_drv_idx++;
+	}
+
+	*metrics_register_done = 1;
+	return 0;
+}
+
+static int32_t
+rte_metrics_tel_update_metrics_ethdev(uint16_t port_id, int reg_start_index)
+{
+	int ret, num_xstats, i;
+	struct rte_eth_xstat *eth_xstats;
+
+	if (!rte_eth_dev_is_valid_port(port_id)) {
+		METRICS_LOG_ERR("port_id: %d is invalid", port_id);
+		return -EINVAL;
+	}
+
+	ret = rte_metrics_tel_is_port_active(port_id);
+	if (ret < 1)
+		return -EINVAL;
+
+	num_xstats = rte_eth_xstats_get(port_id, NULL, 0);
+	if (num_xstats < 0) {
+		METRICS_LOG_ERR("rte_eth_xstats_get(%u) failed: %d", port_id,
+				num_xstats);
+		return -EPERM;
+	}
+
+	eth_xstats = malloc(sizeof(struct rte_eth_xstat) * num_xstats);
+	if (eth_xstats == NULL) {
+		METRICS_LOG_ERR("Failed to malloc memory for xstats");
+		return -ENOMEM;
+	}
+
+	ret = rte_eth_xstats_get(port_id, eth_xstats, num_xstats);
+	if (ret < 0 || ret > num_xstats) {
+		free(eth_xstats);
+		METRICS_LOG_ERR("rte_eth_xstats_get(%u) len%i failed: %d",
+				port_id, num_xstats, ret);
+		return -EPERM;
+	}
+
+	uint64_t xstats_values[num_xstats];
+	for (i = 0; i < num_xstats; i++)
+		xstats_values[i] = eth_xstats[i].value;
+
+	ret = rte_metrics_update_values(port_id, reg_start_index, xstats_values,
+			num_xstats);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Could not update metrics values");
+		free(eth_xstats);
+		return -EPERM;
+	}
+
+	free(eth_xstats);
+	return 0;
+}
+
+static int
+rte_metrics_tel_get_metrics(uint32_t port_id, struct rte_metric_value
+	*metrics, struct rte_metric_name *names, int num_metrics)
+{
+	int ret, num_values;
+
+	if (num_metrics < 0) {
+		METRICS_LOG_ERR("Invalid metrics count");
+		return -EINVAL;
+	} else if (num_metrics == 0) {
+		METRICS_LOG_ERR("No metrics to display (none have been registered)");
+		return -EPERM;
+	}
+
+	if (metrics == NULL) {
+		METRICS_LOG_ERR("Metrics must be initialised.");
+		return -EINVAL;
+	}
+
+	if (names == NULL) {
+		METRICS_LOG_ERR("Names must be initialised.");
+		return -EINVAL;
+	}
+
+	ret = rte_metrics_get_names(names, num_metrics);
+	if (ret < 0 || ret > num_metrics) {
+		METRICS_LOG_ERR("Cannot get metrics names");
+		return -EPERM;
+	}
+
+	num_values = rte_metrics_get_values(port_id, NULL, 0);
+	ret = rte_metrics_get_values(port_id, metrics, num_values);
+	if (ret < 0 || ret > num_values) {
+		METRICS_LOG_ERR("Cannot get metrics values");
+		return -EPERM;
+	}
+
+	return 0;
+}
+
+static int32_t
+rte_metrics_tel_json_format_stat(json_t *stats, const char *metric_name,
+	uint64_t metric_value)
+{
+	int ret;
+	json_t *stat = json_object();
+
+	if (stat == NULL) {
+		METRICS_LOG_ERR("Could not create stat JSON object");
+		return -EPERM;
+	}
+
+	ret = json_object_set_new(stat, "name", json_string(metric_name));
+	if (ret < 0) {
+		METRICS_LOG_ERR("Stat Name field cannot be set");
+		return -EPERM;
+	}
+
+	ret = json_object_set_new(stat, "value", json_integer(metric_value));
+	if (ret < 0) {
+		METRICS_LOG_ERR("Stat Value field cannot be set");
+		return -EPERM;
+	}
+
+	ret = json_array_append_new(stats, stat);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Stat cannot be added to stats json array");
+		return -EPERM;
+	}
+
+	return 0;
+}
+
+static int32_t
+rte_metrics_tel_json_format_port(uint32_t port_id, json_t *ports,
+	uint32_t *metric_ids, int num_metric_ids)
+{
+	struct rte_metric_value *metrics = 0;
+	struct rte_metric_name *names = 0;
+	int num_metrics, ret;
+	json_t *port, *stats;
+	int i;
+
+	num_metrics = rte_metrics_get_names(NULL, 0);
+	if (num_metrics < 0) {
+		METRICS_LOG_ERR("Cannot get metrics count");
+		goto einval_fail;
+	} else if (num_metrics == 0) {
+		METRICS_LOG_ERR("No metrics to display (none have been registered)");
+		goto eperm_fail;
+	}
+
+	metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
+	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
+	if (metrics == NULL || names == NULL) {
+		METRICS_LOG_ERR("Cannot allocate memory");
+		free(metrics);
+		free(names);
+		return -ENOMEM;
+	}
+
+	ret  = rte_metrics_tel_get_metrics(port_id, metrics, names,
+			num_metrics);
+	if (ret < 0) {
+		free(metrics);
+		free(names);
+		METRICS_LOG_ERR("rte_metrics_tel_get_metrics failed");
+		return ret;
+	}
+
+	port = json_object();
+	stats = json_array();
+	if (port == NULL || stats == NULL) {
+		METRICS_LOG_ERR("Could not create port/stats JSON objects");
+		goto eperm_fail;
+	}
+
+	ret = json_object_set_new(port, "port", json_integer(port_id));
+	if (ret < 0) {
+		METRICS_LOG_ERR("Port field cannot be set");
+		goto eperm_fail;
+	}
+
+	for (i = 0; i < num_metric_ids; i++) {
+		int metric_id = metric_ids[i];
+		int metric_index = -1;
+		int metric_name_key = -1;
+		int32_t j;
+		uint64_t metric_value;
+
+		if (metric_id >= num_metrics) {
+			METRICS_LOG_ERR("Metric_id: %d is not valid",
+					metric_id);
+			goto einval_fail;
+		}
+
+		for (j = 0; j < num_metrics; j++) {
+			if (metrics[j].key == metric_id) {
+				metric_name_key = metrics[j].key;
+				metric_index = j;
+				break;
+			}
+		}
+
+		const char *metric_name = names[metric_name_key].name;
+		metric_value = metrics[metric_index].value;
+
+		if (metric_name_key < 0 || metric_index < 0) {
+			METRICS_LOG_ERR("Could not get metric name/index");
+			goto eperm_fail;
+		}
+
+		ret = rte_metrics_tel_json_format_stat(stats, metric_name,
+				metric_value);
+		if (ret < 0) {
+			METRICS_LOG_ERR("Format stat with id: %u failed",
+					metric_id);
+			free(metrics);
+			free(names);
+			return ret;
+		}
+	}
+
+	if (json_array_size(stats) == 0)
+		ret = json_object_set_new(port, "stats", json_null());
+	else
+		ret = json_object_set_new(port, "stats", stats);
+
+	if (ret < 0) {
+		METRICS_LOG_ERR("Stats object cannot be set");
+		goto eperm_fail;
+	}
+
+	ret = json_array_append_new(ports, port);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Port object cannot be added to ports array");
+		goto eperm_fail;
+	}
+
+	free(metrics);
+	free(names);
+	return 0;
+
+eperm_fail:
+	free(metrics);
+	free(names);
+	return -EPERM;
+
+einval_fail:
+	free(metrics);
+	free(names);
+	return -EINVAL;
+}
+
+int32_t
+rte_metrics_tel_encode_json_format(struct telemetry_encode_param *ep,
+		char **json_buffer)
+{
+	int ret;
+	json_t *root, *ports;
+	int i;
+	uint32_t port_id;
+	int num_port_ids;
+	int num_metric_ids;
+
+	ports = json_array();
+	if (ports == NULL) {
+		METRICS_LOG_ERR("Could not create ports JSON array");
+		return -EPERM;
+	}
+
+	if (ep->type == PORT_STATS) {
+		num_port_ids = ep->pp.num_port_ids;
+		num_metric_ids = ep->pp.num_metric_ids;
+
+		if (num_port_ids <= 0 || num_metric_ids <= 0) {
+			METRICS_LOG_ERR("Please provide port and metric ids to query");
+			return -EINVAL;
+		}
+
+		for (i = 0; i < num_port_ids; i++) {
+			port_id = ep->pp.port_ids[i];
+			if (!rte_eth_dev_is_valid_port(port_id)) {
+				METRICS_LOG_ERR("Port: %d invalid",
+						port_id);
+				return -EINVAL;
+			}
+		}
+
+		for (i = 0; i < num_port_ids; i++) {
+			port_id = ep->pp.port_ids[i];
+			ret = rte_metrics_tel_json_format_port(port_id,
+					ports, &ep->pp.metric_ids[0],
+					num_metric_ids);
+			if (ret < 0) {
+				METRICS_LOG_ERR("Format port in JSON failed");
+				return ret;
+			}
+		}
+	} else if (ep->type == GLOBAL_STATS) {
+		/* Request Global Metrics */
+		ret = rte_metrics_tel_json_format_port(RTE_METRICS_GLOBAL,
+				ports, &ep->gp.metric_ids[0],
+				ep->gp.num_metric_ids);
+		if (ret < 0) {
+			METRICS_LOG_ERR(" Request Global Metrics Failed");
+			return ret;
+		}
+	} else {
+		METRICS_LOG_ERR(" Invalid metrics type in encode params");
+		return -EINVAL;
+	}
+
+	root = json_object();
+	if (root == NULL) {
+		METRICS_LOG_ERR("Could not create root JSON object");
+		return -EPERM;
+	}
+
+	ret = json_object_set_new(root, "status_code",
+		json_string("Status OK: 200"));
+	if (ret < 0) {
+		METRICS_LOG_ERR("Status code field cannot be set");
+		return -EPERM;
+	}
+
+	ret = json_object_set_new(root, "data", ports);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Data field cannot be set");
+		return -EPERM;
+	}
+
+	*json_buffer = json_dumps(root, JSON_INDENT(2));
+	json_decref(root);
+	return 0;
+}
+
+int32_t
+rte_metrics_tel_get_global_stats(struct telemetry_encode_param *ep)
+{
+	int num_metrics, ret, i;
+	struct rte_metric_value *values;
+
+	num_metrics = rte_metrics_get_values(RTE_METRICS_GLOBAL, NULL, 0);
+	if (num_metrics < 0) {
+		METRICS_LOG_ERR("Cannot get metrics count");
+		return -EINVAL;
+	} else if (num_metrics == 0) {
+		METRICS_LOG_ERR("No metrics to display (none have been registered)");
+		return -EPERM;
+	}
+
+	values = malloc(sizeof(struct rte_metric_value) * num_metrics);
+	if (values == NULL) {
+		METRICS_LOG_ERR("Cannot allocate memory");
+		return -ENOMEM;
+	}
+
+	ret = rte_metrics_get_values(RTE_METRICS_GLOBAL, values, num_metrics);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Could not get stat values");
+		free(values);
+		return -EINVAL;
+	}
+	for (i = 0; i < num_metrics; i++)
+		ep->gp.metric_ids[i] = values[i].key;
+
+	ep->gp.num_metric_ids = num_metrics;
+	ep->type = GLOBAL_STATS;
+	free(values);
+	return 0;
+}
+
+int32_t
+rte_metrics_tel_get_ports_stats_json(struct telemetry_encode_param *ep,
+		int *reg_index, char **json_buffer)
+{
+	int ret, i;
+	uint32_t port_id;
+
+	for (i = 0; i < ep->pp.num_port_ids; i++) {
+		port_id = ep->pp.port_ids[i];
+		if (!rte_eth_dev_is_valid_port(port_id)) {
+			METRICS_LOG_ERR("Port: %d invalid", port_id);
+			return -EINVAL;
+		}
+
+		ret = rte_metrics_tel_update_metrics_ethdev(port_id,
+				reg_index[i]);
+		if (ret < 0) {
+			METRICS_LOG_ERR("Failed to update ethdev metrics");
+			return ret;
+		}
+	}
+
+	ret = rte_metrics_tel_encode_json_format(ep, json_buffer);
+	if (ret < 0) {
+		METRICS_LOG_ERR("JSON encode function failed");
+		return ret;
+	}
+	return 0;
+}
+
+int32_t
+rte_metrics_tel_get_port_stats_ids(struct telemetry_encode_param *ep)
+{
+	int ret, num_metrics, i, p;
+	struct rte_metric_value *values;
+	uint64_t num_port_ids = 0;
+
+	num_metrics = rte_metrics_get_values(0, NULL, 0);
+	if (num_metrics < 0) {
+		METRICS_LOG_ERR("Cannot get metrics count");
+		return -EINVAL;
+	} else if (num_metrics == 0) {
+		METRICS_LOG_ERR("No metrics to display (none have been registered)");
+		return -EPERM;
+	}
+
+	values = malloc(sizeof(struct rte_metric_value) * num_metrics);
+	if (values == NULL) {
+		METRICS_LOG_ERR("Cannot allocate memory");
+		return -ENOMEM;
+	}
+
+	RTE_ETH_FOREACH_DEV(p) {
+		ep->pp.port_ids[num_port_ids] = p;
+		num_port_ids++;
+	}
+
+	if (!num_port_ids) {
+		METRICS_LOG_ERR("No active ports");
+		goto fail;
+	}
+
+	ret = rte_metrics_get_values(ep->pp.port_ids[0], values, num_metrics);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Could not get stat values");
+		goto fail;
+	}
+	for (i = 0; i < num_metrics; i++)
+		ep->pp.metric_ids[i] = values[i].key;
+
+	ep->pp.num_port_ids = num_port_ids;
+	ep->pp.num_metric_ids = num_metrics;
+	ep->type = PORT_STATS;
+	return 0;
+
+fail:
+	free(values);
+	return -EINVAL;
+}
+
+static int32_t
+rte_metrics_tel_stat_names_to_ids(const char * const *stat_names,
+	uint32_t *stat_ids, uint64_t num_stat_names)
+{
+	struct rte_metric_name *names;
+	int ret, num_metrics;
+	uint32_t i, k;
+
+	if (stat_names == NULL) {
+		METRICS_LOG_WARN("Invalid stat_names argument");
+		return -EINVAL;
+	}
+
+	if (num_stat_names <= 0) {
+		METRICS_LOG_WARN("Invalid num_stat_names argument");
+		return -EINVAL;
+	}
+
+	num_metrics = rte_metrics_get_names(NULL, 0);
+	if (num_metrics < 0) {
+		METRICS_LOG_ERR("Cannot get metrics count");
+		return -EPERM;
+	} else if (num_metrics == 0) {
+		METRICS_LOG_WARN("No metrics have been registered");
+		return -EPERM;
+	}
+
+	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
+	if (names == NULL) {
+		METRICS_LOG_ERR("Cannot allocate memory for names");
+		return -ENOMEM;
+	}
+
+	ret = rte_metrics_get_names(names, num_metrics);
+	if (ret < 0 || ret > num_metrics) {
+		METRICS_LOG_ERR("Cannot get metrics names");
+		free(names);
+		return -EPERM;
+	}
+
+	k = 0;
+	for (i = 0; i < (uint32_t)num_stat_names; i++) {
+		uint32_t j;
+		for (j = 0; j < (uint32_t)num_metrics; j++) {
+			if (strcmp(stat_names[i], names[j].name) == 0) {
+				stat_ids[k] = j;
+				k++;
+				break;
+			}
+		}
+	}
+
+	if (k != num_stat_names) {
+		METRICS_LOG_WARN("Invalid stat names provided");
+		free(names);
+		return -EINVAL;
+	}
+
+	free(names);
+	return 0;
+}
+
+int32_t
+rte_metrics_tel_extract_data(struct telemetry_encode_param *ep, json_t *data)
+{
+	int ret;
+	json_t *port_ids_json = json_object_get(data, "ports");
+	json_t *stat_names_json = json_object_get(data, "stats");
+	uint64_t num_stat_names = json_array_size(stat_names_json);
+	const char *stat_names[num_stat_names];
+	size_t index;
+	json_t *value;
+
+	memset(ep, 0, sizeof(*ep));
+	ep->pp.num_port_ids = json_array_size(port_ids_json);
+	ep->pp.num_metric_ids = num_stat_names;
+	if (!json_is_object(data)) {
+		METRICS_LOG_WARN("Invalid data provided for this command");
+		return -EINVAL;
+	}
+
+	if (!json_is_array(port_ids_json) ||
+		 !json_is_array(stat_names_json)) {
+		METRICS_LOG_WARN("Invalid input data array(s)");
+		return -EINVAL;
+	}
+
+	json_array_foreach(port_ids_json, index, value) {
+		if (!json_is_integer(value)) {
+			METRICS_LOG_WARN("Port ID given is not valid");
+			return -EINVAL;
+		}
+		ep->pp.port_ids[index] = json_integer_value(value);
+		ret = rte_metrics_tel_is_port_active(ep->pp.port_ids[index]);
+		if (ret < 1)
+			return -EINVAL;
+	}
+
+	json_array_foreach(stat_names_json, index, value) {
+		if (!json_is_string(value)) {
+			METRICS_LOG_WARN("Stat Name given is not a string");
+			return -EINVAL;
+		}
+		stat_names[index] = json_string_value(value);
+	}
+
+	ret = rte_metrics_tel_stat_names_to_ids(stat_names, ep->pp.metric_ids,
+			num_stat_names);
+	if (ret < 0) {
+		METRICS_LOG_ERR("Could not convert stat names to IDs");
+		return ret;
+	}
+
+	ep->type = PORT_STATS;
+	return 0;
+}
+
+RTE_INIT(metrics_ctor)
+{
+	metrics_log_level = rte_log_register("lib.metrics");
+	if (metrics_log_level >= 0)
+		rte_log_set_level(metrics_log_level, RTE_LOG_ERR);
+}
diff --git a/lib/librte_metrics/rte_metrics_telemetry.h b/lib/librte_metrics/rte_metrics_telemetry.h
new file mode 100644
index 0000000000..4104f15681
--- /dev/null
+++ b/lib/librte_metrics/rte_metrics_telemetry.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2020 Intel Corporation
+ */
+
+#ifdef RTE_LIBRTE_TELEMETRY
+#include <jansson.h>
+#else
+#define json_t void *
+#endif
+
+#include "rte_metrics.h"
+
+#ifndef _RTE_METRICS_TELEMETRY_H_
+#define _RTE_METRICS_TELEMETRY_H_
+
+
+enum rte_telemetry_stats_type {
+	PORT_STATS = 0,
+	GLOBAL_STATS = 1
+};
+
+struct telemetry_encode_param {
+	enum rte_telemetry_stats_type type;
+	union {
+		struct port_param {
+			int num_metric_ids;
+			uint32_t metric_ids[RTE_METRICS_MAX_METRICS];
+			int num_port_ids;
+			uint32_t port_ids[RTE_MAX_ETHPORTS];
+		} pp;
+		struct global_param {
+			int num_metric_ids;
+			uint32_t metric_ids[RTE_METRICS_MAX_METRICS];
+		} gp;
+	};
+};
+
+struct telemetry_metrics_data {
+	int reg_index[RTE_MAX_ETHPORTS];
+	int metrics_register_done;
+};
+
+struct telemetry_metrics_data tel_met_data;
+
+__rte_experimental
+int32_t rte_metrics_tel_reg_all_ethdev(int *metrics_register_done,
+		int *reg_index_list);
+
+__rte_experimental
+int32_t
+rte_metrics_tel_encode_json_format(struct telemetry_encode_param *ep,
+		char **json_buffer);
+
+__rte_experimental
+int32_t
+rte_metrics_tel_get_global_stats(struct telemetry_encode_param *ep);
+
+__rte_experimental
+int32_t
+rte_metrics_tel_get_port_stats_ids(struct telemetry_encode_param *ep);
+
+__rte_experimental
+int32_t
+rte_metrics_tel_get_ports_stats_json(struct telemetry_encode_param *ep,
+		int *reg_index, char **json_buffer);
+
+__rte_experimental
+int32_t
+rte_metrics_tel_extract_data(struct telemetry_encode_param *ep, json_t *data);
+
+#endif
diff --git a/lib/librte_metrics/rte_metrics_version.map b/lib/librte_metrics/rte_metrics_version.map
index 85663f356e..c88939b117 100644
--- a/lib/librte_metrics/rte_metrics_version.map
+++ b/lib/librte_metrics/rte_metrics_version.map
@@ -16,4 +16,11 @@ EXPERIMENTAL {
 	global:
 
 	rte_metrics_deinit;
+	rte_metrics_tel_encode_json_format;
+	rte_metrics_tel_reg_all_ethdev;
+	rte_metrics_tel_get_global_stats;
+	rte_metrics_tel_get_port_stats_ids;
+	rte_metrics_tel_get_ports_stats_json;
+	rte_metrics_tel_extract_data;
+
 };
diff --git a/lib/librte_telemetry/rte_telemetry.c b/lib/librte_telemetry/rte_telemetry.c
index eb20cc6515..1867b61f6f 100644
--- a/lib/librte_telemetry/rte_telemetry.c
+++ b/lib/librte_telemetry/rte_telemetry.c
@@ -49,93 +49,6 @@ rte_telemetry_get_runtime_dir(char *socket_path, size_t size)
 	snprintf(socket_path, size, "%s/telemetry", rte_eal_get_runtime_dir());
 }
 
-int32_t
-rte_telemetry_is_port_active(int port_id)
-{
-	int ret;
-
-	ret = rte_eth_find_next(port_id);
-	if (ret == port_id)
-		return 1;
-
-	TELEMETRY_LOG_ERR("port_id: %d is invalid, not active",
-		port_id);
-
-	return 0;
-}
-
-static int32_t
-rte_telemetry_update_metrics_ethdev(struct telemetry_impl *telemetry,
-	uint16_t port_id, int reg_start_index)
-{
-	int ret, num_xstats, i;
-	struct rte_eth_xstat *eth_xstats;
-
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		TELEMETRY_LOG_ERR("port_id: %d is invalid", port_id);
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	ret = rte_telemetry_is_port_active(port_id);
-	if (ret < 1) {
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	num_xstats = rte_eth_xstats_get(port_id, NULL, 0);
-	if (num_xstats < 0) {
-		TELEMETRY_LOG_ERR("rte_eth_xstats_get(%u) failed: %d", port_id,
-				num_xstats);
-		ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	eth_xstats = malloc(sizeof(struct rte_eth_xstat) * num_xstats);
-	if (eth_xstats == NULL) {
-		TELEMETRY_LOG_ERR("Failed to malloc memory for xstats");
-		ret = rte_telemetry_send_error_response(telemetry, -ENOMEM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	ret = rte_eth_xstats_get(port_id, eth_xstats, num_xstats);
-	if (ret < 0 || ret > num_xstats) {
-		free(eth_xstats);
-		TELEMETRY_LOG_ERR("rte_eth_xstats_get(%u) len%i failed: %d",
-				port_id, num_xstats, ret);
-		ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	uint64_t xstats_values[num_xstats];
-	for (i = 0; i < num_xstats; i++)
-		xstats_values[i] = eth_xstats[i].value;
-
-	ret = rte_metrics_update_values(port_id, reg_start_index, xstats_values,
-			num_xstats);
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Could not update metrics values");
-		ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		free(eth_xstats);
-		return -1;
-	}
-
-	free(eth_xstats);
-	return 0;
-}
-
 static int32_t
 rte_telemetry_write_to_socket(struct telemetry_impl *telemetry,
 	const char *json_string)
@@ -220,328 +133,6 @@ rte_telemetry_send_error_response(struct telemetry_impl *telemetry,
 	return 0;
 }
 
-static int
-rte_telemetry_get_metrics(struct telemetry_impl *telemetry, uint32_t port_id,
-	struct rte_metric_value *metrics, struct rte_metric_name *names,
-	int num_metrics)
-{
-	int ret, num_values;
-
-	if (num_metrics < 0) {
-		TELEMETRY_LOG_ERR("Invalid metrics count");
-		goto einval_fail;
-	} else if (num_metrics == 0) {
-		TELEMETRY_LOG_ERR("No metrics to display (none have been registered)");
-		goto eperm_fail;
-	}
-
-	if (metrics == NULL) {
-		TELEMETRY_LOG_ERR("Metrics must be initialised.");
-		goto einval_fail;
-	}
-
-	if (names == NULL) {
-		TELEMETRY_LOG_ERR("Names must be initialised.");
-		goto einval_fail;
-	}
-
-	ret = rte_metrics_get_names(names, num_metrics);
-	if (ret < 0 || ret > num_metrics) {
-		TELEMETRY_LOG_ERR("Cannot get metrics names");
-		goto eperm_fail;
-	}
-
-	num_values = rte_metrics_get_values(port_id, NULL, 0);
-	ret = rte_metrics_get_values(port_id, metrics, num_values);
-	if (ret < 0 || ret > num_values) {
-		TELEMETRY_LOG_ERR("Cannot get metrics values");
-		goto eperm_fail;
-	}
-
-	return 0;
-
-eperm_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-einval_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-}
-
-static int32_t
-rte_telemetry_json_format_stat(struct telemetry_impl *telemetry, json_t *stats,
-	const char *metric_name, uint64_t metric_value)
-{
-	int ret;
-	json_t *stat = json_object();
-
-	if (stat == NULL) {
-		TELEMETRY_LOG_ERR("Could not create stat JSON object");
-		goto eperm_fail;
-	}
-
-	ret = json_object_set_new(stat, "name", json_string(metric_name));
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Stat Name field cannot be set");
-		goto eperm_fail;
-	}
-
-	ret = json_object_set_new(stat, "value", json_integer(metric_value));
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Stat Value field cannot be set");
-		goto eperm_fail;
-	}
-
-	ret = json_array_append_new(stats, stat);
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Stat cannot be added to stats json array");
-		goto eperm_fail;
-	}
-
-	return 0;
-
-eperm_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-}
-
-static int32_t
-rte_telemetry_json_format_port(struct telemetry_impl *telemetry,
-	uint32_t port_id, json_t *ports, uint32_t *metric_ids,
-	int num_metric_ids)
-{
-	struct rte_metric_value *metrics = 0;
-	struct rte_metric_name *names = 0;
-	int num_metrics, ret, err_ret;
-	json_t *port, *stats;
-	int i;
-
-	num_metrics = rte_metrics_get_names(NULL, 0);
-	if (num_metrics < 0) {
-		TELEMETRY_LOG_ERR("Cannot get metrics count");
-		goto einval_fail;
-	} else if (num_metrics == 0) {
-		TELEMETRY_LOG_ERR("No metrics to display (none have been registered)");
-		goto eperm_fail;
-	}
-
-	metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
-	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
-	if (metrics == NULL || names == NULL) {
-		TELEMETRY_LOG_ERR("Cannot allocate memory");
-		free(metrics);
-		free(names);
-
-		err_ret = rte_telemetry_send_error_response(telemetry, -ENOMEM);
-		if (err_ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	ret  = rte_telemetry_get_metrics(telemetry, port_id, metrics, names,
-		num_metrics);
-	if (ret < 0) {
-		free(metrics);
-		free(names);
-		TELEMETRY_LOG_ERR("rte_telemetry_get_metrics failed");
-		return -1;
-	}
-
-	port = json_object();
-	stats = json_array();
-	if (port == NULL || stats == NULL) {
-		TELEMETRY_LOG_ERR("Could not create port/stats JSON objects");
-		goto eperm_fail;
-	}
-
-	ret = json_object_set_new(port, "port", json_integer(port_id));
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Port field cannot be set");
-		goto eperm_fail;
-	}
-
-	for (i = 0; i < num_metric_ids; i++) {
-		int metric_id = metric_ids[i];
-		int metric_index = -1;
-		int metric_name_key = -1;
-		int32_t j;
-		uint64_t metric_value;
-
-		if (metric_id >= num_metrics) {
-			TELEMETRY_LOG_ERR("Metric_id: %d is not valid",
-					metric_id);
-			goto einval_fail;
-		}
-
-		for (j = 0; j < num_metrics; j++) {
-			if (metrics[j].key == metric_id) {
-				metric_name_key = metrics[j].key;
-				metric_index = j;
-				break;
-			}
-		}
-
-		const char *metric_name = names[metric_name_key].name;
-		metric_value = metrics[metric_index].value;
-
-		if (metric_name_key < 0 || metric_index < 0) {
-			TELEMETRY_LOG_ERR("Could not get metric name/index");
-			goto eperm_fail;
-		}
-
-		ret = rte_telemetry_json_format_stat(telemetry, stats,
-			metric_name, metric_value);
-		if (ret < 0) {
-			TELEMETRY_LOG_ERR("Format stat with id: %u failed",
-					metric_id);
-			free(metrics);
-			free(names);
-			return -1;
-		}
-	}
-
-	if (json_array_size(stats) == 0)
-		ret = json_object_set_new(port, "stats", json_null());
-	else
-		ret = json_object_set_new(port, "stats", stats);
-
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Stats object cannot be set");
-		goto eperm_fail;
-	}
-
-	ret = json_array_append_new(ports, port);
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Port object cannot be added to ports array");
-		goto eperm_fail;
-	}
-
-	free(metrics);
-	free(names);
-	return 0;
-
-eperm_fail:
-	free(metrics);
-	free(names);
-	ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-einval_fail:
-	free(metrics);
-	free(names);
-	ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-}
-
-static int32_t
-rte_telemetry_encode_json_format(struct telemetry_impl *telemetry,
-	struct telemetry_encode_param *ep, char **json_buffer)
-{
-	int ret;
-	json_t *root, *ports;
-	int i;
-	uint32_t port_id;
-	int num_port_ids;
-	int num_metric_ids;
-
-	ports = json_array();
-	if (ports == NULL) {
-		TELEMETRY_LOG_ERR("Could not create ports JSON array");
-		goto eperm_fail;
-	}
-
-	if (ep->type == PORT_STATS) {
-		num_port_ids = ep->pp.num_port_ids;
-		num_metric_ids = ep->pp.num_metric_ids;
-
-		if (num_port_ids <= 0 || num_metric_ids <= 0) {
-			TELEMETRY_LOG_ERR("Please provide port and metric ids to query");
-			goto einval_fail;
-		}
-
-		for (i = 0; i < num_port_ids; i++) {
-			port_id = ep->pp.port_ids[i];
-			if (!rte_eth_dev_is_valid_port(port_id)) {
-				TELEMETRY_LOG_ERR("Port: %d invalid",
-							port_id);
-				goto einval_fail;
-			}
-		}
-
-		for (i = 0; i < num_port_ids; i++) {
-			port_id = ep->pp.port_ids[i];
-			ret = rte_telemetry_json_format_port(telemetry,
-					port_id, ports, &ep->pp.metric_ids[0],
-					num_metric_ids);
-			if (ret < 0) {
-				TELEMETRY_LOG_ERR("Format port in JSON failed");
-				return -1;
-			}
-		}
-	} else if (ep->type == GLOBAL_STATS) {
-		/* Request Global Metrics */
-		ret = rte_telemetry_json_format_port(telemetry,
-				RTE_METRICS_GLOBAL,
-				ports, &ep->gp.metric_ids[0],
-				ep->gp.num_metric_ids);
-		if (ret < 0) {
-			TELEMETRY_LOG_ERR(" Request Global Metrics Failed");
-			return -1;
-		}
-	} else {
-		TELEMETRY_LOG_ERR(" Invalid metrics type in encode params");
-		goto einval_fail;
-	}
-
-	root = json_object();
-	if (root == NULL) {
-		TELEMETRY_LOG_ERR("Could not create root JSON object");
-		goto eperm_fail;
-	}
-
-	ret = json_object_set_new(root, "status_code",
-		json_string("Status OK: 200"));
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Status code field cannot be set");
-		goto eperm_fail;
-	}
-
-	ret = json_object_set_new(root, "data", ports);
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Data field cannot be set");
-		goto eperm_fail;
-	}
-
-	*json_buffer = json_dumps(root, JSON_INDENT(2));
-	json_decref(root);
-	return 0;
-
-eperm_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-einval_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-}
-
 int32_t
 rte_telemetry_send_global_stats_values(struct telemetry_encode_param *ep,
 	struct telemetry_impl *telemetry)
@@ -559,10 +150,12 @@ rte_telemetry_send_global_stats_values(struct telemetry_encode_param *ep,
 		goto einval_fail;
 	}
 
-	ret = rte_telemetry_encode_json_format(telemetry, ep,
-		&json_buffer);
+	ret = rte_metrics_tel_encode_json_format(ep, &json_buffer);
 	if (ret < 0) {
 		TELEMETRY_LOG_ERR("JSON encode function failed");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
+		if (ret < 0)
+			TELEMETRY_LOG_ERR("Could not send error");
 		return -1;
 	}
 
@@ -587,8 +180,6 @@ rte_telemetry_send_ports_stats_values(struct telemetry_encode_param *ep,
 {
 	int ret;
 	char *json_buffer = NULL;
-	uint32_t port_id;
-	int i;
 
 	if (telemetry == NULL) {
 		TELEMETRY_LOG_ERR("Invalid telemetry argument");
@@ -610,24 +201,14 @@ rte_telemetry_send_ports_stats_values(struct telemetry_encode_param *ep,
 		goto einval_fail;
 	}
 
-	for (i = 0; i < ep->pp.num_port_ids; i++) {
-		port_id = ep->pp.port_ids[i];
-		if (!rte_eth_dev_is_valid_port(port_id)) {
-			TELEMETRY_LOG_ERR("Port: %d invalid", port_id);
-			goto einval_fail;
-		}
-
-		ret = rte_telemetry_update_metrics_ethdev(telemetry,
-				port_id, telemetry->reg_index[i]);
-		if (ret < 0) {
-			TELEMETRY_LOG_ERR("Failed to update ethdev metrics");
-			return -1;
-		}
-	}
-
-	ret = rte_telemetry_encode_json_format(telemetry, ep, &json_buffer);
+	ret = rte_metrics_tel_get_ports_stats_json(ep, telemetry->reg_index,
+			&json_buffer);
 	if (ret < 0) {
-		TELEMETRY_LOG_ERR("JSON encode function failed");
+		TELEMETRY_LOG_ERR("Function for get_ports_stats_json"
+				" failed");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
+		if (ret < 0)
+			TELEMETRY_LOG_ERR("Could not send error");
 		return -1;
 	}
 
@@ -646,114 +227,23 @@ rte_telemetry_send_ports_stats_values(struct telemetry_encode_param *ep,
 	return -1;
 }
 
-
-static int32_t
-rte_telemetry_reg_ethdev_to_metrics(uint16_t port_id)
-{
-	int ret, num_xstats, ret_val, i;
-	struct rte_eth_xstat *eth_xstats = NULL;
-	struct rte_eth_xstat_name *eth_xstats_names = NULL;
-
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		TELEMETRY_LOG_ERR("port_id: %d is invalid", port_id);
-		return -EINVAL;
-	}
-
-	num_xstats = rte_eth_xstats_get(port_id, NULL, 0);
-	if (num_xstats < 0) {
-		TELEMETRY_LOG_ERR("rte_eth_xstats_get(%u) failed: %d",
-				port_id, num_xstats);
-		return -EPERM;
-	}
-
-	eth_xstats = malloc(sizeof(struct rte_eth_xstat) * num_xstats);
-	if (eth_xstats == NULL) {
-		TELEMETRY_LOG_ERR("Failed to malloc memory for xstats");
-		return -ENOMEM;
-	}
-
-	ret = rte_eth_xstats_get(port_id, eth_xstats, num_xstats);
-	const char *xstats_names[num_xstats];
-	eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name) * num_xstats);
-	if (ret < 0 || ret > num_xstats) {
-		TELEMETRY_LOG_ERR("rte_eth_xstats_get(%u) len%i failed: %d",
-				port_id, num_xstats, ret);
-		ret_val = -EPERM;
-		goto free_xstats;
-	}
-
-	if (eth_xstats_names == NULL) {
-		TELEMETRY_LOG_ERR("Failed to malloc memory for xstats_names");
-		ret_val = -ENOMEM;
-		goto free_xstats;
-	}
-
-	ret = rte_eth_xstats_get_names(port_id, eth_xstats_names, num_xstats);
-	if (ret < 0 || ret > num_xstats) {
-		TELEMETRY_LOG_ERR("rte_eth_xstats_get_names(%u) len%i failed: %d",
-				port_id, num_xstats, ret);
-		ret_val = -EPERM;
-		goto free_xstats;
-	}
-
-	for (i = 0; i < num_xstats; i++)
-		xstats_names[i] = eth_xstats_names[eth_xstats[i].id].name;
-
-	ret_val = rte_metrics_reg_names(xstats_names, num_xstats);
-	if (ret_val < 0) {
-		TELEMETRY_LOG_ERR("rte_metrics_reg_names failed - metrics may already be registered");
-		ret_val = -1;
-		goto free_xstats;
-	}
-
-	goto free_xstats;
-
-free_xstats:
-	free(eth_xstats);
-	free(eth_xstats_names);
-	return ret_val;
-}
-
 static int32_t
 rte_telemetry_initial_accept(struct telemetry_impl *telemetry)
 {
-	struct driver_index {
-		const void *dev_ops;
-		int reg_index;
-	} drv_idx[RTE_MAX_ETHPORTS] = { {0} };
-	int nb_drv_idx = 0;
-	uint16_t pid;
 	int ret;
 	int selftest = 0;
 
-	RTE_ETH_FOREACH_DEV(pid) {
-		int i;
-		/* Different device types have different numbers of stats, so
-		 * first check if the stats for this type of device have
-		 * already been registered
-		 */
-		for (i = 0; i < nb_drv_idx; i++) {
-			if (rte_eth_devices[pid].dev_ops == drv_idx[i].dev_ops) {
-				telemetry->reg_index[pid] = drv_idx[i].reg_index;
-				break;
-			}
-		}
-		if (i < nb_drv_idx)
-			continue; /* we found a match, go to next port */
-
-		/* No match, register a new set of xstats for this port */
-		ret = rte_telemetry_reg_ethdev_to_metrics(pid);
-		if (ret < 0) {
-			TELEMETRY_LOG_ERR("Failed to register ethdev metrics");
-			return -1;
-		}
-		telemetry->reg_index[pid] = ret;
-		drv_idx[nb_drv_idx].dev_ops = rte_eth_devices[pid].dev_ops;
-		drv_idx[nb_drv_idx].reg_index = ret;
-		nb_drv_idx++;
+	ret = rte_metrics_tel_reg_all_ethdev(
+			&telemetry->metrics_register_done,
+			telemetry->reg_index);
+	if (ret < 0) {
+		TELEMETRY_LOG_ERR("Failed to register ethdev metrics");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
+		if (ret < 0)
+			TELEMETRY_LOG_ERR("Could not send error");
+		return -1;
 	}
 
-	telemetry->metrics_register_done = 1;
 	if (selftest) {
 		ret = rte_telemetry_socket_messaging_testing(telemetry->reg_index[0],
 				telemetry->server_fd);
diff --git a/lib/librte_telemetry/rte_telemetry_internal.h b/lib/librte_telemetry/rte_telemetry_internal.h
index 3f8dbc2db5..ca70e2ed77 100644
--- a/lib/librte_telemetry/rte_telemetry_internal.h
+++ b/lib/librte_telemetry/rte_telemetry_internal.h
@@ -4,6 +4,8 @@
 
 #include <rte_log.h>
 #include <rte_tailq.h>
+#include <rte_metrics.h>
+#include <rte_metrics_telemetry.h>
 
 #ifndef _RTE_TELEMETRY_INTERNAL_H_
 #define _RTE_TELEMETRY_INTERNAL_H_
@@ -50,28 +52,6 @@ enum rte_telemetry_parser_actions {
 	ACTION_DELETE = 2
 };
 
-enum rte_telemetry_stats_type {
-	PORT_STATS = 0,
-	GLOBAL_STATS = 1
-};
-
-/* @internal */
-struct telemetry_encode_param {
-	enum rte_telemetry_stats_type type;
-	union {
-		struct port_param {
-			int num_metric_ids;
-			uint32_t metric_ids[MAX_METRICS];
-			int num_port_ids;
-			uint32_t port_ids[RTE_MAX_ETHPORTS];
-		} pp;
-		struct global_param {
-			int num_metric_ids;
-			uint32_t metric_ids[MAX_METRICS];
-		} gp;
-	};
-};
-
 int32_t
 rte_telemetry_parse_client_message(struct telemetry_impl *telemetry, char *buf);
 
@@ -87,14 +67,6 @@ int32_t
 rte_telemetry_unregister_client(struct telemetry_impl *telemetry,
 	const char *client_path);
 
-/**
- * This is a wrapper for the ethdev api rte_eth_find_next().
- * If rte_eth_find_next() returns the same port id that we passed it,
- * then we know that that port is active.
- */
-int32_t
-rte_telemetry_is_port_active(int port_id);
-
 int32_t
 rte_telemetry_send_ports_stats_values(struct telemetry_encode_param *ep,
 	struct telemetry_impl *telemetry);
diff --git a/lib/librte_telemetry/rte_telemetry_parser.c b/lib/librte_telemetry/rte_telemetry_parser.c
index e8c269e85e..11edf79e81 100644
--- a/lib/librte_telemetry/rte_telemetry_parser.c
+++ b/lib/librte_telemetry/rte_telemetry_parser.c
@@ -11,6 +11,7 @@
 #include <rte_metrics.h>
 #include <rte_common.h>
 #include <rte_ethdev.h>
+#include <rte_metrics_telemetry.h>
 
 #include "rte_telemetry_internal.h"
 #include "rte_telemetry_parser.h"
@@ -172,93 +173,11 @@ rte_telemetry_command_port_stats(struct telemetry_impl *telemetry, int action,
 	return -1;
 }
 
-static int32_t
-rte_telemetry_stat_names_to_ids(struct telemetry_impl *telemetry,
-	const char * const *stat_names, uint32_t *stat_ids,
-	uint64_t num_stat_names)
-{
-	struct rte_metric_name *names;
-	int ret, num_metrics;
-	uint32_t i, k;
-
-	if (stat_names == NULL) {
-		TELEMETRY_LOG_WARN("Invalid stat_names argument");
-		goto einval_fail;
-	}
-
-	if (num_stat_names <= 0) {
-		TELEMETRY_LOG_WARN("Invalid num_stat_names argument");
-		goto einval_fail;
-	}
-
-	num_metrics = rte_metrics_get_names(NULL, 0);
-	if (num_metrics < 0) {
-		TELEMETRY_LOG_ERR("Cannot get metrics count");
-		goto eperm_fail;
-	} else if (num_metrics == 0) {
-		TELEMETRY_LOG_WARN("No metrics have been registered");
-		goto eperm_fail;
-	}
-
-	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
-	if (names == NULL) {
-		TELEMETRY_LOG_ERR("Cannot allocate memory for names");
-
-		ret = rte_telemetry_send_error_response(telemetry, -ENOMEM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		return -1;
-	}
-
-	ret = rte_metrics_get_names(names, num_metrics);
-	if (ret < 0 || ret > num_metrics) {
-		TELEMETRY_LOG_ERR("Cannot get metrics names");
-		free(names);
-		goto eperm_fail;
-	}
-
-	k = 0;
-	for (i = 0; i < (uint32_t)num_stat_names; i++) {
-		uint32_t j;
-		for (j = 0; j < (uint32_t)num_metrics; j++) {
-			if (strcmp(stat_names[i], names[j].name) == 0) {
-				stat_ids[k] = j;
-				k++;
-				break;
-			}
-		}
-	}
-
-	if (k != num_stat_names) {
-		TELEMETRY_LOG_WARN("Invalid stat names provided");
-		free(names);
-		goto einval_fail;
-	}
-
-	free(names);
-	return 0;
-
-einval_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-
-eperm_fail:
-	ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-	if (ret < 0)
-		TELEMETRY_LOG_ERR("Could not send error");
-	return -1;
-}
-
 static int32_t
 rte_telemetry_command_ports_all_stat_values(struct telemetry_impl *telemetry,
 	 int action, json_t *data)
 {
-	int ret, num_metrics, i, p;
-	struct rte_metric_value *values;
-	uint64_t num_port_ids = 0;
+	int ret;
 	struct telemetry_encode_param ep;
 
 	memset(&ep, 0, sizeof(ep));
@@ -283,85 +202,29 @@ rte_telemetry_command_ports_all_stat_values(struct telemetry_impl *telemetry,
 		return -1;
 	}
 
-	num_metrics = rte_metrics_get_values(0, NULL, 0);
-	if (num_metrics < 0) {
-		TELEMETRY_LOG_ERR("Cannot get metrics count");
-
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		return -1;
-	} else if (num_metrics == 0) {
-		TELEMETRY_LOG_ERR("No metrics to display (none have been registered)");
-
-		ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		return -1;
-	}
-
-	values = malloc(sizeof(struct rte_metric_value) * num_metrics);
-	if (values == NULL) {
-		TELEMETRY_LOG_ERR("Cannot allocate memory");
-		ret = rte_telemetry_send_error_response(telemetry,
-			 -ENOMEM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	RTE_ETH_FOREACH_DEV(p) {
-		ep.pp.port_ids[num_port_ids] = p;
-		num_port_ids++;
-	}
-
-	if (!num_port_ids) {
-		TELEMETRY_LOG_WARN("No active ports");
-
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		goto fail;
-	}
-
-	ret = rte_metrics_get_values(ep.pp.port_ids[0], values, num_metrics);
+	ret = rte_metrics_tel_get_port_stats_ids(&ep);
 	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Could not get stat values");
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
+		TELEMETRY_LOG_ERR("Could not get ports stat values");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
 		if (ret < 0)
 			TELEMETRY_LOG_ERR("Could not send error");
-		goto fail;
+		return -1;
 	}
-	for (i = 0; i < num_metrics; i++)
-		ep.pp.metric_ids[i] = values[i].key;
-
-	ep.pp.num_port_ids = num_port_ids;
-	ep.pp.num_metric_ids = num_metrics;
-	ep.type = PORT_STATS;
 
 	ret = rte_telemetry_send_ports_stats_values(&ep, telemetry);
 	if (ret < 0) {
 		TELEMETRY_LOG_ERR("Sending ports stats values failed");
-		goto fail;
+		return -1;
 	}
 
-	free(values);
 	return 0;
-
-fail:
-	free(values);
-	return -1;
 }
 
 static int32_t
 rte_telemetry_command_global_stat_values(struct telemetry_impl *telemetry,
 	 int action, json_t *data)
 {
-	int ret, num_metrics, i;
-	struct rte_metric_value *values;
+	int ret;
 	struct telemetry_encode_param ep;
 
 	memset(&ep, 0, sizeof(ep));
@@ -386,61 +249,22 @@ rte_telemetry_command_global_stat_values(struct telemetry_impl *telemetry,
 		return -1;
 	}
 
-	num_metrics = rte_metrics_get_values(RTE_METRICS_GLOBAL, NULL, 0);
-	if (num_metrics < 0) {
-		TELEMETRY_LOG_ERR("Cannot get metrics count");
-
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		return -1;
-	} else if (num_metrics == 0) {
-		TELEMETRY_LOG_ERR("No metrics to display (none have been registered)");
-
-		ret = rte_telemetry_send_error_response(telemetry, -EPERM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-
-		return -1;
-	}
-
-	values = malloc(sizeof(struct rte_metric_value) * num_metrics);
-	if (values == NULL) {
-		TELEMETRY_LOG_ERR("Cannot allocate memory");
-		ret = rte_telemetry_send_error_response(telemetry,
-			 -ENOMEM);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	ret = rte_metrics_get_values(RTE_METRICS_GLOBAL, values, num_metrics);
+	ret = rte_metrics_tel_get_global_stats(&ep);
 	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Could not get stat values");
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
+		TELEMETRY_LOG_ERR("Could not get global stat values");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
 		if (ret < 0)
 			TELEMETRY_LOG_ERR("Could not send error");
-		goto fail;
+		return -1;
 	}
-	for (i = 0; i < num_metrics; i++)
-		ep.gp.metric_ids[i] = values[i].key;
-
-	ep.gp.num_metric_ids = num_metrics;
-	ep.type = GLOBAL_STATS;
 
 	ret = rte_telemetry_send_global_stats_values(&ep, telemetry);
 	if (ret < 0) {
 		TELEMETRY_LOG_ERR("Sending global stats values failed");
-		goto fail;
+		return -1;
 	}
 
-	free(values);
 	return 0;
-
-fail:
-	free(values);
-	return -1;
 }
 
 static int32_t
@@ -448,17 +272,7 @@ rte_telemetry_command_ports_stats_values_by_name(struct telemetry_impl
 	*telemetry, int action, json_t *data)
 {
 	int ret;
-	json_t *port_ids_json = json_object_get(data, "ports");
-	json_t *stat_names_json = json_object_get(data, "stats");
-	uint64_t num_stat_names = json_array_size(stat_names_json);
-	const char *stat_names[num_stat_names];
 	struct telemetry_encode_param ep;
-	size_t index;
-	json_t *value;
-
-	memset(&ep, 0, sizeof(ep));
-	ep.pp.num_port_ids = json_array_size(port_ids_json);
-	ep.pp.num_metric_ids = num_stat_names;
 	if (telemetry == NULL) {
 		TELEMETRY_LOG_ERR("Invalid telemetry argument");
 		return -1;
@@ -472,65 +286,15 @@ rte_telemetry_command_ports_stats_values_by_name(struct telemetry_impl
 		return -1;
 	}
 
-	if (!json_is_object(data)) {
-		TELEMETRY_LOG_WARN("Invalid data provided for this command");
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
-		if (ret < 0)
-			TELEMETRY_LOG_ERR("Could not send error");
-		return -1;
-	}
-
-	if (!json_is_array(port_ids_json) ||
-		 !json_is_array(stat_names_json)) {
-		TELEMETRY_LOG_WARN("Invalid input data array(s)");
-		ret = rte_telemetry_send_error_response(telemetry, -EINVAL);
+	ret = rte_metrics_tel_extract_data(&ep, data);
+	if (ret < 0) {
+		TELEMETRY_LOG_ERR("Extracting JSON data failed");
+		ret = rte_telemetry_send_error_response(telemetry, ret);
 		if (ret < 0)
 			TELEMETRY_LOG_ERR("Could not send error");
 		return -1;
 	}
 
-	json_array_foreach(port_ids_json, index, value) {
-		if (!json_is_integer(value)) {
-			TELEMETRY_LOG_WARN("Port ID given is not valid");
-			ret = rte_telemetry_send_error_response(telemetry,
-				-EINVAL);
-			if (ret < 0)
-				TELEMETRY_LOG_ERR("Could not send error");
-			return -1;
-		}
-		ep.pp.port_ids[index] = json_integer_value(value);
-		ret = rte_telemetry_is_port_active(ep.pp.port_ids[index]);
-		if (ret < 1) {
-			ret = rte_telemetry_send_error_response(telemetry,
-				-EINVAL);
-			if (ret < 0)
-				TELEMETRY_LOG_ERR("Could not send error");
-			return -1;
-		}
-	}
-
-	json_array_foreach(stat_names_json, index, value) {
-		if (!json_is_string(value)) {
-			TELEMETRY_LOG_WARN("Stat Name given is not a string");
-
-			ret = rte_telemetry_send_error_response(telemetry,
-					-EINVAL);
-			if (ret < 0)
-				TELEMETRY_LOG_ERR("Could not send error");
-
-			return -1;
-		}
-		stat_names[index] = json_string_value(value);
-	}
-
-	ret = rte_telemetry_stat_names_to_ids(telemetry, stat_names,
-		ep.pp.metric_ids, num_stat_names);
-	if (ret < 0) {
-		TELEMETRY_LOG_ERR("Could not convert stat names to IDs");
-		return -1;
-	}
-
-	ep.type = PORT_STATS;
 	ret = rte_telemetry_send_ports_stats_values(&ep, telemetry);
 	if (ret < 0) {
 		TELEMETRY_LOG_ERR("Sending ports stats values failed");
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index da12b9eec9..302dfe69fe 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -55,7 +55,9 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_TELEMETRY)      += -lrte_telemetry -ljansson
 _LDLIBS-$(CONFIG_RTE_LIBRTE_TELEMETRY)      += --no-whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_TELEMETRY)      += --as-needed
 _LDLIBS-$(CONFIG_RTE_LIBRTE_JOBSTATS)       += -lrte_jobstats
+_LDLIBS-$(CONFIG_RTE_LIBRTE_METRICS)        += --whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_METRICS)        += -lrte_metrics
+_LDLIBS-$(CONFIG_RTE_LIBRTE_METRICS)        += --no-whole-archive
 _LDLIBS-$(CONFIG_RTE_LIBRTE_BITRATE)        += -lrte_bitratestats
 _LDLIBS-$(CONFIG_RTE_LIBRTE_LATENCY_STATS)  += -lrte_latencystats
 _LDLIBS-$(CONFIG_RTE_LIBRTE_POWER)          += -lrte_power
-- 
2.17.1