From: Thomas Monjalon <thomas@monjalon.net>
Date: Thu, 5 Apr 2018 15:33:22 +0000 (+0200)
Subject: ethdev: deprecate port count function
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d9a42a69febf453cdb735e77fc0e01463ddf4acc;p=dpdk.git

ethdev: deprecate port count function

Some DPDK applications wrongly assume these requirements:
    - no hotplug, i.e. ports are never detached
    - all allocated ports are available to the application

Such application iterates over ports by its own mean.
The most common pattern is to request the port count and
assume ports with index in the range [0..count[ can be used.

In order to fix this common mistake in all external applications,
the function rte_eth_dev_count is deprecated, while introducing
the new functions rte_eth_dev_count_avail and rte_eth_dev_count_total.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---

diff --git a/app/proc-info/main.c b/app/proc-info/main.c
index 115df9d962..539e132433 100644
--- a/app/proc-info/main.c
+++ b/app/proc-info/main.c
@@ -628,7 +628,7 @@ main(int argc, char **argv)
 		return 0;
 	}
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
diff --git a/app/test-eventdev/evt_options.h b/app/test-eventdev/evt_options.h
index 1bc7ea0f6b..f3de48a17b 100644
--- a/app/test-eventdev/evt_options.h
+++ b/app/test-eventdev/evt_options.h
@@ -279,7 +279,7 @@ evt_dump_producer_type(struct evt_options *opt)
 	case EVT_PROD_TYPE_ETH_RX_ADPTR:
 		snprintf(name, EVT_PROD_MAX_NAME_LEN,
 				"Ethdev Rx Adapter producers");
-		evt_dump("nb_ethdev", "%d", rte_eth_dev_count());
+		evt_dump("nb_ethdev", "%d", rte_eth_dev_count_avail());
 		break;
 	case EVT_PROD_TYPE_EVENT_TIMER_ADPTR:
 		if (opt->timdev_use_burst)
diff --git a/app/test-eventdev/test_perf_atq.c b/app/test-eventdev/test_perf_atq.c
index b3a3127228..9715a2ce86 100644
--- a/app/test-eventdev/test_perf_atq.c
+++ b/app/test-eventdev/test_perf_atq.c
@@ -11,7 +11,7 @@ atq_nb_event_queues(struct evt_options *opt)
 {
 	/* nb_queues = number of producers */
 	return opt->prod_type == EVT_PROD_TYPE_ETH_RX_ADPTR ?
-		rte_eth_dev_count() : evt_nr_active_lcores(opt->plcores);
+		rte_eth_dev_count_avail() : evt_nr_active_lcores(opt->plcores);
 }
 
 static inline __attribute__((always_inline)) void
diff --git a/app/test-eventdev/test_perf_common.c b/app/test-eventdev/test_perf_common.c
index d1bd5e9a27..d00f918026 100644
--- a/app/test-eventdev/test_perf_common.c
+++ b/app/test-eventdev/test_perf_common.c
@@ -700,7 +700,7 @@ perf_ethdev_setup(struct evt_test *test, struct evt_options *opt)
 			opt->prod_type == EVT_PROD_TYPE_EVENT_TIMER_ADPTR)
 		return 0;
 
-	if (!rte_eth_dev_count()) {
+	if (!rte_eth_dev_count_avail()) {
 		evt_err("No ethernet ports found.");
 		return -ENODEV;
 	}
diff --git a/app/test-eventdev/test_perf_queue.c b/app/test-eventdev/test_perf_queue.c
index 74469a5ee7..04ce941923 100644
--- a/app/test-eventdev/test_perf_queue.c
+++ b/app/test-eventdev/test_perf_queue.c
@@ -11,7 +11,7 @@ perf_queue_nb_event_queues(struct evt_options *opt)
 {
 	/* nb_queues = number of producers * number of stages */
 	uint8_t nb_prod = opt->prod_type == EVT_PROD_TYPE_ETH_RX_ADPTR ?
-		rte_eth_dev_count() : evt_nr_active_lcores(opt->plcores);
+		rte_eth_dev_count_avail() : evt_nr_active_lcores(opt->plcores);
 	return nb_prod * opt->nb_stages;
 }
 
diff --git a/app/test-eventdev/test_pipeline_atq.c b/app/test-eventdev/test_pipeline_atq.c
index dd71897763..26dc79f908 100644
--- a/app/test-eventdev/test_pipeline_atq.c
+++ b/app/test-eventdev/test_pipeline_atq.c
@@ -12,7 +12,7 @@ pipeline_atq_nb_event_queues(struct evt_options *opt)
 {
 	RTE_SET_USED(opt);
 
-	return rte_eth_dev_count();
+	return rte_eth_dev_count_avail();
 }
 
 static int
@@ -324,7 +324,7 @@ pipeline_atq_eventdev_setup(struct evt_test *test, struct evt_options *opt)
 	uint8_t nb_worker_queues = 0;
 
 	nb_ports = evt_nr_active_lcores(opt->wlcores);
-	nb_queues = rte_eth_dev_count();
+	nb_queues = rte_eth_dev_count_avail();
 
 	/* One extra port and queueu for Tx service */
 	if (t->mt_unsafe) {
diff --git a/app/test-eventdev/test_pipeline_common.c b/app/test-eventdev/test_pipeline_common.c
index b4dbe3769c..719518ff33 100644
--- a/app/test-eventdev/test_pipeline_common.c
+++ b/app/test-eventdev/test_pipeline_common.c
@@ -166,7 +166,7 @@ pipeline_opt_check(struct evt_options *opt, uint64_t nb_queues)
 	 */
 	lcores = 2;
 
-	if (!rte_eth_dev_count()) {
+	if (!rte_eth_dev_count_avail()) {
 		evt_err("test needs minimum 1 ethernet dev");
 		return -1;
 	}
@@ -234,7 +234,7 @@ pipeline_ethdev_setup(struct evt_test *test, struct evt_options *opt)
 	};
 
 	RTE_SET_USED(opt);
-	if (!rte_eth_dev_count()) {
+	if (!rte_eth_dev_count_avail()) {
 		evt_err("No ethernet ports found.\n");
 		return -ENODEV;
 	}
@@ -419,7 +419,7 @@ pipeline_event_tx_service_setup(struct evt_test *test, struct evt_options *opt,
 	tx->dev_id = opt->dev_id;
 	tx->queue_id = tx_queue_id;
 	tx->port_id = tx_port_id;
-	tx->nb_ethports = rte_eth_dev_count();
+	tx->nb_ethports = rte_eth_dev_count_avail();
 	tx->t = t;
 
 	/* Register Tx service */
diff --git a/app/test-eventdev/test_pipeline_queue.c b/app/test-eventdev/test_pipeline_queue.c
index 02fc27cf87..ca5f4578ec 100644
--- a/app/test-eventdev/test_pipeline_queue.c
+++ b/app/test-eventdev/test_pipeline_queue.c
@@ -10,7 +10,7 @@
 static __rte_always_inline int
 pipeline_queue_nb_event_queues(struct evt_options *opt)
 {
-	uint16_t eth_count = rte_eth_dev_count();
+	uint16_t eth_count = rte_eth_dev_count_avail();
 
 	return (eth_count * opt->nb_stages) + eth_count;
 }
@@ -333,7 +333,7 @@ pipeline_queue_eventdev_setup(struct evt_test *test, struct evt_options *opt)
 	uint8_t nb_worker_queues = 0;
 
 	nb_ports = evt_nr_active_lcores(opt->wlcores);
-	nb_queues = rte_eth_dev_count() * (nb_stages);
+	nb_queues = rte_eth_dev_count_avail() * (nb_stages);
 
 	/* Extra port for Tx service. */
 	if (t->mt_unsafe) {
@@ -341,7 +341,7 @@ pipeline_queue_eventdev_setup(struct evt_test *test, struct evt_options *opt)
 		nb_ports++;
 		nb_queues++;
 	} else
-		nb_queues += rte_eth_dev_count();
+		nb_queues += rte_eth_dev_count_avail();
 
 	rte_event_dev_info_get(opt->dev_id, &info);
 
diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index b10650b85c..d584f95a75 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -5546,7 +5546,7 @@ static void cmd_create_bonded_device_parsed(void *parsed_result,
 				port_id);
 
 		/* Update number of ports */
-		nb_ports = rte_eth_dev_count();
+		nb_ports = rte_eth_dev_count_avail();
 		reconfig(port_id, res->socket);
 		rte_eth_promiscuous_enable(port_id);
 	}
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 7f7560d396..d6da419278 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1916,7 +1916,7 @@ attach_port(char *identifier)
 	reconfig(pi, socket_id);
 	rte_eth_promiscuous_enable(pi);
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	ports[pi].port_status = RTE_PORT_STOPPED;
 
@@ -1944,7 +1944,7 @@ detach_port(portid_t port_id)
 		return;
 	}
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	printf("Port '%s' is detached. Now total ports is %d\n",
 			name, nb_ports);
@@ -2585,7 +2585,7 @@ main(int argc, char** argv)
 	rte_pdump_init(NULL);
 #endif
 
-	nb_ports = (portid_t) rte_eth_dev_count();
+	nb_ports = (portid_t) rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		TESTPMD_LOG(WARNING, "No probed ethernet devices\n");
 
diff --git a/doc/guides/rel_notes/release_18_05.rst b/doc/guides/rel_notes/release_18_05.rst
index 149e73bbda..2d6f9d8d46 100644
--- a/doc/guides/rel_notes/release_18_05.rst
+++ b/doc/guides/rel_notes/release_18_05.rst
@@ -153,6 +153,13 @@ API Changes
   memory footprint which helps in better cache utilization when large number
   of meter objects are used.
 
+* ethdev: The function ``rte_eth_dev_count``, often mis-used to iterate
+  over ports, is deprecated and replaced by ``rte_eth_dev_count_avail``.
+  There is also a new function ``rte_eth_dev_count_total`` to get the
+  total number of allocated ports, available or not.
+  The hotplug-proof applications should use ``RTE_ETH_FOREACH_DEV`` or
+  ``RTE_ETH_FOREACH_DEV_OWNED_BY`` as port iterators.
+
 * ethdev, in struct ``struct rte_eth_dev_info``, field ``rte_pci_device *pci_dev``
   replaced with field ``struct rte_device *device``.
 
diff --git a/doc/guides/sample_app_ug/quota_watermark.rst b/doc/guides/sample_app_ug/quota_watermark.rst
index 8baec4df82..67200e15d7 100644
--- a/doc/guides/sample_app_ug/quota_watermark.rst
+++ b/doc/guides/sample_app_ug/quota_watermark.rst
@@ -163,7 +163,7 @@ Then, a call to init_dpdk(), defined in init.c, is made to initialize the poll m
         if (ret < 0)
             rte_exit(EXIT_FAILURE, "rte_pci_probe(): error %d\n", ret);
 
-        if (rte_eth_dev_count() < 2)
+        if (rte_eth_dev_count_avail() < 2)
             rte_exit(EXIT_FAILURE, "Not enough Ethernet port available\n");
     }
 
diff --git a/examples/bond/main.c b/examples/bond/main.c
index d4097d04d9..d8edc642b6 100644
--- a/examples/bond/main.c
+++ b/examples/bond/main.c
@@ -748,7 +748,7 @@ main(int argc, char *argv[])
 	argc -= ret;
 	argv += ret;
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "Give at least one port\n");
 	else if (nb_ports > MAX_PORTS)
diff --git a/examples/distributor/main.c b/examples/distributor/main.c
index 2e6b09d215..2c59364899 100644
--- a/examples/distributor/main.c
+++ b/examples/distributor/main.c
@@ -193,7 +193,7 @@ struct lcore_params {
 static int
 lcore_rx(struct lcore_params *p)
 {
-	const uint16_t nb_ports = rte_eth_dev_count();
+	const uint16_t nb_ports = rte_eth_dev_count_avail();
 	const int socket_id = rte_socket_id();
 	uint16_t port;
 	struct rte_mbuf *bufs[BURST_SIZE*2];
@@ -542,7 +542,7 @@ lcore_worker(struct lcore_params *p)
 	 * for single port, xor_val will be zero so we won't modify the output
 	 * port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
 	 */
-	const unsigned xor_val = (rte_eth_dev_count() > 1);
+	const unsigned xor_val = (rte_eth_dev_count_avail() > 1);
 	struct rte_mbuf *buf[8] __rte_cache_aligned;
 
 	for (i = 0; i < 8; i++)
@@ -678,7 +678,7 @@ main(int argc, char *argv[])
 				"1 lcore for packet TX\n"
 				"and at least 1 lcore for worker threads\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 	if (nb_ports != 1 && (nb_ports & 1))
diff --git a/examples/ethtool/ethtool-app/main.c b/examples/ethtool/ethtool-app/main.c
index 702feabe9f..c1815bb946 100644
--- a/examples/ethtool/ethtool-app/main.c
+++ b/examples/ethtool/ethtool-app/main.c
@@ -251,7 +251,7 @@ int main(int argc, char **argv)
 	if (cnt_args_parsed < 0)
 		rte_exit(EXIT_FAILURE, "rte_eal_init(): Failed");
 
-	cnt_ports = rte_eth_dev_count();
+	cnt_ports = rte_eth_dev_count_avail();
 	printf("Number of NICs: %i\n", cnt_ports);
 	if (cnt_ports == 0)
 		rte_exit(EXIT_FAILURE, "No available NIC ports!\n");
diff --git a/examples/eventdev_pipeline/main.c b/examples/eventdev_pipeline/main.c
index 48358a7d2f..b698e4ca2f 100644
--- a/examples/eventdev_pipeline/main.c
+++ b/examples/eventdev_pipeline/main.c
@@ -429,7 +429,7 @@ int
 main(int argc, char **argv)
 {
 	struct worker_data *worker_data;
-	unsigned int num_ports;
+	uint16_t num_ports;
 	int lcore_id;
 	int err;
 
@@ -451,7 +451,7 @@ main(int argc, char **argv)
 	/* Parse cli options*/
 	parse_app_args(argc, argv);
 
-	num_ports = rte_eth_dev_count();
+	num_ports = rte_eth_dev_count_avail();
 	if (num_ports == 0)
 		rte_panic("No ethernet ports found\n");
 
diff --git a/examples/eventdev_pipeline/pipeline_worker_tx.c b/examples/eventdev_pipeline/pipeline_worker_tx.c
index fc98128ece..3dbde92dff 100644
--- a/examples/eventdev_pipeline/pipeline_worker_tx.c
+++ b/examples/eventdev_pipeline/pipeline_worker_tx.c
@@ -422,7 +422,7 @@ setup_eventdev_worker_tx(struct cons_data *cons_data,
 	const uint8_t dev_id = 0;
 	const uint8_t nb_ports = cdata.num_workers;
 	uint8_t nb_slots = 0;
-	uint8_t nb_queues = rte_eth_dev_count();
+	uint8_t nb_queues = rte_eth_dev_count_avail();
 
 	/*
 	 * In case where all type queues are not enabled, use queues equal to
@@ -431,7 +431,7 @@ setup_eventdev_worker_tx(struct cons_data *cons_data,
 	 */
 	if (!atq) {
 		nb_queues *= cdata.num_stages;
-		nb_queues += rte_eth_dev_count();
+		nb_queues += rte_eth_dev_count_avail();
 	}
 
 	struct rte_event_dev_config config = {
diff --git a/examples/exception_path/main.c b/examples/exception_path/main.c
index 996f4939dc..2b381a5d85 100644
--- a/examples/exception_path/main.c
+++ b/examples/exception_path/main.c
@@ -559,7 +559,7 @@ main(int argc, char** argv)
 	}
 
 	/* Get number of ports found in scan */
-	nb_sys_ports = rte_eth_dev_count();
+	nb_sys_ports = rte_eth_dev_count_avail();
 	if (nb_sys_ports == 0)
 		FATAL_ERROR("No supported Ethernet device found");
 	/* Find highest port set in portmask */
diff --git a/examples/flow_classify/flow_classify.c b/examples/flow_classify/flow_classify.c
index d0e537e7d5..3b087ce768 100644
--- a/examples/flow_classify/flow_classify.c
+++ b/examples/flow_classify/flow_classify.c
@@ -752,7 +752,7 @@ int
 main(int argc, char *argv[])
 {
 	struct rte_mempool *mbuf_pool;
-	uint8_t nb_ports;
+	uint16_t nb_ports;
 	uint16_t portid;
 	int ret;
 	int socket_id;
@@ -776,7 +776,7 @@ main(int argc, char *argv[])
 		rte_exit(EXIT_FAILURE, "Invalid flow_classify parameters\n");
 
 	/* Check that there is an even number of ports to send/receive on. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports < 2 || (nb_ports & 1))
 		rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 
diff --git a/examples/flow_filtering/Makefile b/examples/flow_filtering/Makefile
index 01bb4cd817..f41b368fa0 100644
--- a/examples/flow_filtering/Makefile
+++ b/examples/flow_filtering/Makefile
@@ -50,6 +50,8 @@ CFLAGS += -O3 $(shell pkg-config --cflags libdpdk)
 LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk)
 LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk)
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
 build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
 	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
 
@@ -75,6 +77,7 @@ RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
 include $(RTE_SDK)/mk/rte.vars.mk
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/examples/flow_filtering/main.c b/examples/flow_filtering/main.c
index 0bb81a8dd4..db03c9c3a0 100644
--- a/examples/flow_filtering/main.c
+++ b/examples/flow_filtering/main.c
@@ -232,7 +232,7 @@ int
 main(int argc, char **argv)
 {
 	int ret;
-	uint8_t nr_ports;
+	uint16_t nr_ports;
 	struct rte_flow_error error;
 
 	ret = rte_eal_init(argc, argv);
@@ -243,7 +243,7 @@ main(int argc, char **argv)
 	signal(SIGINT, signal_handler);
 	signal(SIGTERM, signal_handler);
 
-	nr_ports = rte_eth_dev_count();
+	nr_ports = rte_eth_dev_count_avail();
 	if (nr_ports == 0)
 		rte_exit(EXIT_FAILURE, ":: no Ethernet ports found\n");
 	port_id = 0;
diff --git a/examples/flow_filtering/meson.build b/examples/flow_filtering/meson.build
index 407795c428..9494933008 100644
--- a/examples/flow_filtering/meson.build
+++ b/examples/flow_filtering/meson.build
@@ -9,3 +9,4 @@
 sources = files(
 	'main.c',
 )
+allow_experimental_apis = true
diff --git a/examples/ip_fragmentation/main.c b/examples/ip_fragmentation/main.c
index f525c3a9c9..8952ea4564 100644
--- a/examples/ip_fragmentation/main.c
+++ b/examples/ip_fragmentation/main.c
@@ -843,7 +843,7 @@ main(int argc, char **argv)
 	struct rte_eth_txconf *txconf;
 	struct rx_queue *rxq;
 	int socket, ret;
-	unsigned nb_ports;
+	uint16_t nb_ports;
 	uint16_t queueid = 0;
 	unsigned lcore_id = 0, rx_lcore_id = 0;
 	uint32_t n_tx_queue, nb_lcores;
@@ -861,7 +861,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Invalid arguments");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No ports found!\n");
 
diff --git a/examples/ip_reassembly/main.c b/examples/ip_reassembly/main.c
index ddff358800..3e8e79c212 100644
--- a/examples/ip_reassembly/main.c
+++ b/examples/ip_reassembly/main.c
@@ -1008,7 +1008,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Invalid IP reassembly parameters\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No ports found!\n");
 
diff --git a/examples/ipv4_multicast/main.c b/examples/ipv4_multicast/main.c
index 23b266bbe2..ad2072f412 100644
--- a/examples/ipv4_multicast/main.c
+++ b/examples/ipv4_multicast/main.c
@@ -674,7 +674,7 @@ main(int argc, char **argv)
 	if (clone_pool == NULL)
 		rte_exit(EXIT_FAILURE, "Cannot init clone mbuf pool\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No physical ports!\n");
 	if (nb_ports > MAX_PORTS)
diff --git a/examples/kni/main.c b/examples/kni/main.c
index 901480a3f2..4b162debb1 100644
--- a/examples/kni/main.c
+++ b/examples/kni/main.c
@@ -926,7 +926,7 @@ main(int argc, char** argv)
 	}
 
 	/* Get number of ports found in scan */
-	nb_sys_ports = rte_eth_dev_count();
+	nb_sys_ports = rte_eth_dev_count_avail();
 	if (nb_sys_ports == 0)
 		rte_exit(EXIT_FAILURE, "No supported Ethernet device found\n");
 
diff --git a/examples/l2fwd-cat/l2fwd-cat.c b/examples/l2fwd-cat/l2fwd-cat.c
index ed48780436..0e6078aad8 100644
--- a/examples/l2fwd-cat/l2fwd-cat.c
+++ b/examples/l2fwd-cat/l2fwd-cat.c
@@ -173,7 +173,7 @@ main(int argc, char *argv[])
 	argv += ret;
 
 	/* Check that there is an even number of ports to send/receive on. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports < 2 || (nb_ports & 1))
 		rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 
diff --git a/examples/l2fwd-crypto/main.c b/examples/l2fwd-crypto/main.c
index b1ad192841..4220448988 100644
--- a/examples/l2fwd-crypto/main.c
+++ b/examples/l2fwd-crypto/main.c
@@ -2311,7 +2311,7 @@ initialize_ports(struct l2fwd_crypto_options *options)
 {
 	uint16_t last_portid = 0, portid;
 	unsigned enabled_portcount = 0;
-	unsigned nb_ports = rte_eth_dev_count();
+	unsigned nb_ports = rte_eth_dev_count_avail();
 
 	if (nb_ports == 0) {
 		printf("No Ethernet ports - bye\n");
diff --git a/examples/l2fwd-jobstats/main.c b/examples/l2fwd-jobstats/main.c
index 248224840a..34553faa29 100644
--- a/examples/l2fwd-jobstats/main.c
+++ b/examples/l2fwd-jobstats/main.c
@@ -770,7 +770,7 @@ main(int argc, char **argv)
 	if (l2fwd_pktmbuf_pool == NULL)
 		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
diff --git a/examples/l2fwd-keepalive/main.c b/examples/l2fwd-keepalive/main.c
index e9ad91a1fc..a18b707cdf 100644
--- a/examples/l2fwd-keepalive/main.c
+++ b/examples/l2fwd-keepalive/main.c
@@ -561,7 +561,7 @@ main(int argc, char **argv)
 	if (l2fwd_pktmbuf_pool == NULL)
 		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index f8ca29cf67..6908435786 100644
--- a/examples/l2fwd/main.c
+++ b/examples/l2fwd/main.c
@@ -545,7 +545,7 @@ main(int argc, char **argv)
 	/* convert to number of cycles */
 	timer_period *= rte_get_timer_hz();
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
diff --git a/examples/l3fwd-acl/main.c b/examples/l3fwd-acl/main.c
index 2c891b4945..33ad467d38 100644
--- a/examples/l3fwd-acl/main.c
+++ b/examples/l3fwd-acl/main.c
@@ -1891,7 +1891,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init_lcore_rx_queues failed\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	if (check_port_config() < 0)
 		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index d6a092618f..596d64548d 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -1650,7 +1650,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init_lcore_rx_queues failed\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	if (check_port_config() < 0)
 		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
diff --git a/examples/l3fwd-vf/main.c b/examples/l3fwd-vf/main.c
index dd0e057efa..aaafb7bc2d 100644
--- a/examples/l3fwd-vf/main.c
+++ b/examples/l3fwd-vf/main.c
@@ -949,7 +949,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init_lcore_rx_queues failed\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	if (check_port_config() < 0)
 		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c
index ec1da5c181..bf7dbd8148 100644
--- a/examples/l3fwd/main.c
+++ b/examples/l3fwd/main.c
@@ -826,7 +826,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init_lcore_rx_queues failed\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	if (check_port_config() < 0)
 		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
diff --git a/examples/link_status_interrupt/Makefile b/examples/link_status_interrupt/Makefile
index 1606821232..d778fcbbf0 100644
--- a/examples/link_status_interrupt/Makefile
+++ b/examples/link_status_interrupt/Makefile
@@ -23,6 +23,8 @@ CFLAGS += -O3 $(shell pkg-config --cflags libdpdk)
 LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk)
 LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk)
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
 build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
 	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
 
@@ -48,6 +50,7 @@ RTE_TARGET ?= x86_64-native-linuxapp-gcc
 
 include $(RTE_SDK)/mk/rte.vars.mk
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/examples/link_status_interrupt/main.c b/examples/link_status_interrupt/main.c
index ad0dd390d1..f568956801 100644
--- a/examples/link_status_interrupt/main.c
+++ b/examples/link_status_interrupt/main.c
@@ -542,7 +542,7 @@ main(int argc, char **argv)
 	if (lsi_pktmbuf_pool == NULL)
 		rte_panic("Cannot init mbuf pool\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_panic("No Ethernet port - bye\n");
 
diff --git a/examples/link_status_interrupt/meson.build b/examples/link_status_interrupt/meson.build
index c34e11e36d..2b0a250361 100644
--- a/examples/link_status_interrupt/meson.build
+++ b/examples/link_status_interrupt/meson.build
@@ -6,6 +6,7 @@
 # To build this example as a standalone application with an already-installed
 # DPDK instance, use 'make'
 
+allow_experimental_apis = true
 sources = files(
 	'main.c'
 )
diff --git a/examples/multi_process/client_server_mp/mp_client/Makefile b/examples/multi_process/client_server_mp/mp_client/Makefile
index 298e1b0204..3bfcd75c5e 100644
--- a/examples/multi_process/client_server_mp/mp_client/Makefile
+++ b/examples/multi_process/client_server_mp/mp_client/Makefile
@@ -14,6 +14,7 @@ APP = mp_client
 # all source are stored in SRCS-y
 SRCS-y := client.c
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += $(WERROR_FLAGS) -O3
 CFLAGS += -I$(SRCDIR)/../shared
 
diff --git a/examples/multi_process/client_server_mp/mp_client/client.c b/examples/multi_process/client_server_mp/mp_client/client.c
index 92955e9748..c23dd3f378 100644
--- a/examples/multi_process/client_server_mp/mp_client/client.c
+++ b/examples/multi_process/client_server_mp/mp_client/client.c
@@ -220,7 +220,7 @@ main(int argc, char *argv[])
 	if (parse_app_args(argc, argv) < 0)
 		rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
 
-	if (rte_eth_dev_count() == 0)
+	if (rte_eth_dev_count_avail() == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
 	rx_ring = rte_ring_lookup(get_rx_queue_name(client_id));
diff --git a/examples/multi_process/client_server_mp/mp_server/Makefile b/examples/multi_process/client_server_mp/mp_server/Makefile
index 3e244e2830..af7246e6ba 100644
--- a/examples/multi_process/client_server_mp/mp_server/Makefile
+++ b/examples/multi_process/client_server_mp/mp_server/Makefile
@@ -23,6 +23,7 @@ SRCS-y := main.c init.c args.c
 
 INC := $(sort $(wildcard *.h))
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += $(WERROR_FLAGS) -O3
 CFLAGS += -I$(SRCDIR)/../shared
 
diff --git a/examples/multi_process/client_server_mp/mp_server/init.c b/examples/multi_process/client_server_mp/mp_server/init.c
index 1c465ccbc2..30c8e44bc0 100644
--- a/examples/multi_process/client_server_mp/mp_server/init.c
+++ b/examples/multi_process/client_server_mp/mp_server/init.c
@@ -243,7 +243,7 @@ init(int argc, char *argv[])
 	argv += retval;
 
 	/* get total number of ports */
-	total_ports = rte_eth_dev_count();
+	total_ports = rte_eth_dev_count_total();
 
 	/* set up array for port data */
 	mz = rte_memzone_reserve(MZ_PORT_INFO, sizeof(*ports),
diff --git a/examples/multi_process/l2fwd_fork/main.c b/examples/multi_process/l2fwd_fork/main.c
index 6b130f2f5d..94318ab610 100644
--- a/examples/multi_process/l2fwd_fork/main.c
+++ b/examples/multi_process/l2fwd_fork/main.c
@@ -941,7 +941,7 @@ main(int argc, char **argv)
 	for (i = 0; i < RTE_MAX_LCORE; i++)
 		lcore_resource[i].lcore_id = i;
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
diff --git a/examples/multi_process/symmetric_mp/main.c b/examples/multi_process/symmetric_mp/main.c
index 75cad0ccae..16f21a187d 100644
--- a/examples/multi_process/symmetric_mp/main.c
+++ b/examples/multi_process/symmetric_mp/main.c
@@ -418,7 +418,7 @@ main(int argc, char **argv)
 	argv += ret;
 
 	/* determine the NIC devices available */
-	if (rte_eth_dev_count() == 0)
+	if (rte_eth_dev_count_avail() == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
 	/* parse application arguments (those after the EAL ones) */
diff --git a/examples/netmap_compat/bridge/Makefile b/examples/netmap_compat/bridge/Makefile
index a7c9c14a88..071c09dd31 100644
--- a/examples/netmap_compat/bridge/Makefile
+++ b/examples/netmap_compat/bridge/Makefile
@@ -27,6 +27,7 @@ VPATH := $(SRCDIR)/../lib
 SRCS-y := bridge.c
 SRCS-y += compat_netmap.c
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3 -I$(SRCDIR)/../lib -I$(SRCDIR)/../netmap
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/examples/netmap_compat/bridge/bridge.c b/examples/netmap_compat/bridge/bridge.c
index 59c5e4361a..cb1882e65d 100644
--- a/examples/netmap_compat/bridge/bridge.c
+++ b/examples/netmap_compat/bridge/bridge.c
@@ -236,7 +236,7 @@ int main(int argc, char *argv[])
 	if (ports.num == 0)
 		rte_exit(EXIT_FAILURE, "no ports specified\n");
 
-	if (rte_eth_dev_count() < 1)
+	if (rte_eth_dev_count_avail() < 1)
 		rte_exit(EXIT_FAILURE, "Not enough ethernet ports available\n");
 
 	pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL, 32, 0,
diff --git a/examples/packet_ordering/main.c b/examples/packet_ordering/main.c
index 676cb6f717..7ace7d10ea 100644
--- a/examples/packet_ordering/main.c
+++ b/examples/packet_ordering/main.c
@@ -430,7 +430,7 @@ rx_thread(struct rte_ring *ring_out)
 static int
 worker_thread(void *args_ptr)
 {
-	const uint8_t nb_ports = rte_eth_dev_count();
+	const uint16_t nb_ports = rte_eth_dev_count_avail();
 	uint16_t i, ret = 0;
 	uint16_t burst_size = 0;
 	struct worker_thread_args *args;
@@ -644,7 +644,7 @@ main(int argc, char **argv)
 				"1 lcore for packet TX\n"
 				"and at least 1 lcore for worker threads\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0)
 		rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
 	if (nb_ports != 1 && (nb_ports & 1))
diff --git a/examples/performance-thread/l3fwd-thread/main.c b/examples/performance-thread/l3fwd-thread/main.c
index 699b99d001..f51e6b0fdb 100644
--- a/examples/performance-thread/l3fwd-thread/main.c
+++ b/examples/performance-thread/l3fwd-thread/main.c
@@ -3514,7 +3514,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init_rx_rings failed\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	if (check_port_config() < 0)
 		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
index 55be3f7cd0..c44013bc12 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -727,7 +727,7 @@ main(int argc, char *argv[])
 		rte_exit(EXIT_FAILURE, "Error with PTP initialization\n");
 
 	/* Check that there is an even number of ports to send/receive on. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	/* Creates a new mempool in memory to hold the mbufs. */
 	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
diff --git a/examples/qos_sched/Makefile b/examples/qos_sched/Makefile
index 0f0a31ff2f..e6dfbef1fd 100644
--- a/examples/qos_sched/Makefile
+++ b/examples/qos_sched/Makefile
@@ -23,6 +23,8 @@ CFLAGS += -O3 $(shell pkg-config --cflags libdpdk)
 LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk)
 LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk)
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
 build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
 	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
 
@@ -55,6 +57,7 @@ all:
 clean:
 else
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3
 CFLAGS += $(WERROR_FLAGS)
 CFLAGS_args.o := -D_GNU_SOURCE
diff --git a/examples/qos_sched/init.c b/examples/qos_sched/init.c
index 8914f766f6..c9e487975c 100644
--- a/examples/qos_sched/init.c
+++ b/examples/qos_sched/init.c
@@ -298,7 +298,7 @@ int app_init(void)
 	char ring_name[MAX_NAME_LEN];
 	char pool_name[MAX_NAME_LEN];
 
-	if (rte_eth_dev_count() == 0)
+	if (rte_eth_dev_count_avail() == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet port - bye\n");
 
 	/* load configuration profile */
diff --git a/examples/qos_sched/meson.build b/examples/qos_sched/meson.build
index 289b81ce80..5101652af9 100644
--- a/examples/qos_sched/meson.build
+++ b/examples/qos_sched/meson.build
@@ -7,6 +7,7 @@
 # DPDK instance, use 'make'
 
 deps += ['sched', 'cfgfile']
+allow_experimental_apis = true
 sources = files(
 	'app_thread.c', 'args.c', 'cfg_file.c', 'cmdline.c',
 	'init.c', 'main.c', 'stats.c'
diff --git a/examples/quota_watermark/qw/Makefile b/examples/quota_watermark/qw/Makefile
index 84299e5945..d0a9b3cf4f 100644
--- a/examples/quota_watermark/qw/Makefile
+++ b/examples/quota_watermark/qw/Makefile
@@ -16,6 +16,7 @@ APP = qw
 # all source are stored in SRCS-y
 SRCS-y := args.c init.c main.c
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += -O3 -DQW_SOFTWARE_FC
 CFLAGS += $(WERROR_FLAGS)
 
diff --git a/examples/quota_watermark/qw/init.c b/examples/quota_watermark/qw/init.c
index d4a691839c..00725bc95d 100644
--- a/examples/quota_watermark/qw/init.c
+++ b/examples/quota_watermark/qw/init.c
@@ -112,7 +112,7 @@ void configure_eth_port(uint16_t port_id)
 void
 init_dpdk(void)
 {
-	if (rte_eth_dev_count() < 2)
+	if (rte_eth_dev_count_avail() < 2)
 		rte_exit(EXIT_FAILURE, "Not enough ethernet port available\n");
 }
 
diff --git a/examples/rxtx_callbacks/main.c b/examples/rxtx_callbacks/main.c
index 84b09cf059..e63ea288f6 100644
--- a/examples/rxtx_callbacks/main.c
+++ b/examples/rxtx_callbacks/main.c
@@ -188,7 +188,7 @@ main(int argc, char *argv[])
 	argc -= ret;
 	argv += ret;
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports < 2 || (nb_ports & 1))
 		rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 
diff --git a/examples/server_node_efd/node/Makefile b/examples/server_node_efd/node/Makefile
index fffbe35767..dc3191a5b3 100644
--- a/examples/server_node_efd/node/Makefile
+++ b/examples/server_node_efd/node/Makefile
@@ -14,6 +14,7 @@ APP = node
 # all source are stored in SRCS-y
 SRCS-y := node.c
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += $(WERROR_FLAGS) -O3
 CFLAGS += -I$(SRCDIR)/../shared
 
diff --git a/examples/server_node_efd/node/node.c b/examples/server_node_efd/node/node.c
index 84f7bcffe9..3b97fbd45d 100644
--- a/examples/server_node_efd/node/node.c
+++ b/examples/server_node_efd/node/node.c
@@ -320,7 +320,7 @@ main(int argc, char *argv[])
 	if (parse_app_args(argc, argv) < 0)
 		rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
 
-	if (rte_eth_dev_count() == 0)
+	if (rte_eth_dev_count_avail() == 0)
 		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 
 	rx_ring = rte_ring_lookup(get_rx_queue_name(node_id));
diff --git a/examples/server_node_efd/server/Makefile b/examples/server_node_efd/server/Makefile
index cbb91ebe89..d5456f920f 100644
--- a/examples/server_node_efd/server/Makefile
+++ b/examples/server_node_efd/server/Makefile
@@ -23,6 +23,7 @@ SRCS-y := main.c init.c args.c
 
 INC := $(sort $(wildcard *.h))
 
+CFLAGS += -DALLOW_EXPERIMENTAL_API
 CFLAGS += $(WERROR_FLAGS) -O3
 CFLAGS += -I$(SRCDIR)/../shared
 
diff --git a/examples/server_node_efd/server/init.c b/examples/server_node_efd/server/init.c
index 07b6882f80..7dfe2fa232 100644
--- a/examples/server_node_efd/server/init.c
+++ b/examples/server_node_efd/server/init.c
@@ -310,7 +310,7 @@ init(int argc, char *argv[])
 	argv += retval;
 
 	/* get total number of ports */
-	total_ports = rte_eth_dev_count();
+	total_ports = rte_eth_dev_count_avail();
 
 	/* set up array for port data */
 	mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info),
diff --git a/examples/skeleton/basicfwd.c b/examples/skeleton/basicfwd.c
index 5ac1dc8201..03bc358568 100644
--- a/examples/skeleton/basicfwd.c
+++ b/examples/skeleton/basicfwd.c
@@ -173,7 +173,7 @@ main(int argc, char *argv[])
 	argv += ret;
 
 	/* Check that there is an even number of ports to send/receive on. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports < 2 || (nb_ports & 1))
 		rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
 
diff --git a/examples/skeleton/meson.build b/examples/skeleton/meson.build
index ef46b187e7..89ddba2eac 100644
--- a/examples/skeleton/meson.build
+++ b/examples/skeleton/meson.build
@@ -10,3 +10,5 @@ allow_experimental_apis = true
 sources = files(
 	'basicfwd.c'
 )
+
+allow_experimental_apis = true
diff --git a/examples/tep_termination/main.c b/examples/tep_termination/main.c
index e868541767..8543a98030 100644
--- a/examples/tep_termination/main.c
+++ b/examples/tep_termination/main.c
@@ -1156,7 +1156,7 @@ main(int argc, char *argv[])
 	nb_switching_cores = rte_lcore_count()-1;
 
 	/* Get the number of physical ports. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	/*
 	 * Update the global var NB_PORTS and global array PORTS
diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 7cddac7d2c..84e0d6366d 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -1448,7 +1448,7 @@ main(int argc, char *argv[])
 		rte_exit(EXIT_FAILURE,"Not enough cores\n");
 
 	/* Get the number of physical ports. */
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	/*
 	 * Update the global var NUM_PORTS and global array PORTS
diff --git a/examples/vm_power_manager/main.c b/examples/vm_power_manager/main.c
index db0ddb01df..c9805a4616 100644
--- a/examples/vm_power_manager/main.c
+++ b/examples/vm_power_manager/main.c
@@ -278,7 +278,7 @@ main(int argc, char **argv)
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "Invalid arguments\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
 		MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
diff --git a/examples/vmdq/main.c b/examples/vmdq/main.c
index 2f3eb74f50..52596dd5e7 100644
--- a/examples/vmdq/main.c
+++ b/examples/vmdq/main.c
@@ -580,7 +580,7 @@ main(int argc, char *argv[])
 	if (rte_lcore_count() > RTE_MAX_LCORE)
 		rte_exit(EXIT_FAILURE, "Not enough cores\n");
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	/*
 	 * Update the global var NUM_PORTS and global array PORTS
diff --git a/examples/vmdq_dcb/main.c b/examples/vmdq_dcb/main.c
index 9c68ab0895..2626a2f19f 100644
--- a/examples/vmdq_dcb/main.c
+++ b/examples/vmdq_dcb/main.c
@@ -642,7 +642,7 @@ main(int argc, char *argv[])
 				" number of cores(1-%d)\n\n", RTE_MAX_LCORE);
 	}
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 
 	/*
 	 * Update the global var NUM_PORTS and global array PORTS
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 3c049ef43c..7821a88838 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -534,6 +534,12 @@ rte_eth_dev_get_sec_ctx(uint16_t port_id)
 
 uint16_t
 rte_eth_dev_count(void)
+{
+	return rte_eth_dev_count_avail();
+}
+
+uint16_t
+rte_eth_dev_count_avail(void)
 {
 	uint16_t p;
 	uint16_t count;
@@ -546,6 +552,18 @@ rte_eth_dev_count(void)
 	return count;
 }
 
+uint16_t
+rte_eth_dev_count_total(void)
+{
+	uint16_t port, count = 0;
+
+	for (port = 0; port < RTE_MAX_ETHPORTS; port++)
+		if (rte_eth_devices[port].state != RTE_ETH_DEV_UNUSED)
+			count++;
+
+	return count;
+}
+
 int
 rte_eth_dev_get_name_by_port(uint16_t port_id, char *name)
 {
@@ -601,7 +619,7 @@ int
 rte_eth_dev_attach(const char *devargs, uint16_t *port_id)
 {
 	int ret = -1;
-	int current = rte_eth_dev_count();
+	int current = rte_eth_dev_count_total();
 	char *name = NULL;
 	char *args = NULL;
 
@@ -619,7 +637,7 @@ rte_eth_dev_attach(const char *devargs, uint16_t *port_id)
 		goto err;
 
 	/* no point looking at the port count if no port exists */
-	if (!rte_eth_dev_count()) {
+	if (!rte_eth_dev_count_total()) {
 		ethdev_log(ERR, "No port found for device (%s)", name);
 		ret = -1;
 		goto err;
@@ -627,8 +645,9 @@ rte_eth_dev_attach(const char *devargs, uint16_t *port_id)
 
 	/* if nothing happened, there is a bug here, since some driver told us
 	 * it did attach a device, but did not create a port.
+	 * FIXME: race condition in case of plug-out of another device
 	 */
-	if (current == rte_eth_dev_count()) {
+	if (current == rte_eth_dev_count_total()) {
 		ret = -1;
 		goto err;
 	}
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 4f417f573c..7e4e57b3ca 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1385,8 +1385,31 @@ int __rte_experimental rte_eth_dev_owner_get(const uint16_t port_id,
  * @return
  *   - The total number of usable Ethernet devices.
  */
+__rte_deprecated
 uint16_t rte_eth_dev_count(void);
 
+/**
+ * Get the number of ports which are usable for the application.
+ *
+ * These devices must be iterated by using the macro
+ * ``RTE_ETH_FOREACH_DEV`` or ``RTE_ETH_FOREACH_DEV_OWNED_BY``
+ * to deal with non-contiguous ranges of devices.
+ *
+ * @return
+ *   The count of available Ethernet devices.
+ */
+uint16_t __rte_experimental rte_eth_dev_count_avail(void);
+
+/**
+ * Get the total number of ports which are allocated.
+ *
+ * Some devices may not be available for the application.
+ *
+ * @return
+ *   The total count of Ethernet devices.
+ */
+uint16_t __rte_experimental rte_eth_dev_count_total(void);
+
 /**
  * Attach a new Ethernet device specified by arguments.
  *
diff --git a/lib/librte_ether/rte_ethdev_version.map b/lib/librte_ether/rte_ethdev_version.map
index 34df6c8b52..8fe07880f8 100644
--- a/lib/librte_ether/rte_ethdev_version.map
+++ b/lib/librte_ether/rte_ethdev_version.map
@@ -206,6 +206,8 @@ DPDK_18.02 {
 EXPERIMENTAL {
 	global:
 
+	rte_eth_dev_count_avail;
+	rte_eth_dev_count_total;
 	rte_eth_dev_is_removed;
 	rte_eth_dev_owner_delete;
 	rte_eth_dev_owner_get;
@@ -228,4 +230,4 @@ EXPERIMENTAL {
 	rte_mtr_stats_read;
 	rte_mtr_stats_update;
 
-} DPDK_17.11;
+} DPDK_18.02;
diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.c b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
index bf5b44f177..aec270397d 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
@@ -900,7 +900,8 @@ rte_event_eth_rx_adapter_create_ext(uint8_t id, uint8_t dev_id,
 	rx_adapter->conf_arg = conf_arg;
 	strcpy(rx_adapter->mem_name, mem_name);
 	rx_adapter->eth_devices = rte_zmalloc_socket(rx_adapter->mem_name,
-					rte_eth_dev_count() *
+					/* FIXME: incompatible with hotplug */
+					rte_eth_dev_count_total() *
 					sizeof(struct eth_device_info), 0,
 					socket_id);
 	rte_convert_rss_key((const uint32_t *)default_rss_key,
diff --git a/test/test/test_event_eth_rx_adapter.c b/test/test/test_event_eth_rx_adapter.c
index 2234df0eb3..ab55398091 100644
--- a/test/test/test_event_eth_rx_adapter.c
+++ b/test/test/test_event_eth_rx_adapter.c
@@ -164,7 +164,7 @@ testsuite_setup(void)
 	 * so rte_eth_dev_start invokes rte_event_dev_start internally, so
 	 * call init_ports after rte_event_dev_configure
 	 */
-	err = init_ports(rte_eth_dev_count());
+	err = init_ports(rte_eth_dev_count_total());
 	TEST_ASSERT(err == 0, "Port initialization failed err %d\n", err);
 
 	err = rte_event_eth_rx_adapter_caps_get(TEST_DEV_ID, TEST_ETHDEV_ID,
@@ -273,7 +273,7 @@ adapter_queue_add_del(void)
 	queue_config.servicing_weight = 1;
 
 	err = rte_event_eth_rx_adapter_queue_add(TEST_INST_ID,
-						rte_eth_dev_count(),
+						rte_eth_dev_count_total(),
 						-1, &queue_config);
 	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);
 
diff --git a/test/test/test_kni.c b/test/test/test_kni.c
index 3d1be56a98..56773c8a2e 100644
--- a/test/test/test_kni.c
+++ b/test/test/test_kni.c
@@ -489,7 +489,7 @@ test_kni(void)
 		return -1;
 	}
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports == 0) {
 		printf("no supported nic port found\n");
 		return -1;
diff --git a/test/test/test_link_bonding_mode4.c b/test/test/test_link_bonding_mode4.c
index 426877a2a0..33c1fab011 100644
--- a/test/test/test_link_bonding_mode4.c
+++ b/test/test/test_link_bonding_mode4.c
@@ -425,7 +425,7 @@ test_setup(void)
 			TEST_ASSERT(retval >= 0,
 				"Failed to create ring ethdev '%s'\n", name);
 
-			port->port_id = rte_eth_dev_count() - 1;
+			port->port_id = rte_eth_dev_count_avail() - 1;
 		}
 
 		retval = configure_ethdev(port->port_id, 1);
diff --git a/test/test/test_link_bonding_rssconf.c b/test/test/test_link_bonding_rssconf.c
index 4cc08f5a22..6a1a28d236 100644
--- a/test/test/test_link_bonding_rssconf.c
+++ b/test/test/test_link_bonding_rssconf.c
@@ -521,7 +521,7 @@ test_setup(void)
 	FOR_EACH_PORT(n, port) {
 		port = &test_params.slave_ports[n];
 
-		port_id = rte_eth_dev_count();
+		port_id = rte_eth_dev_count_avail();
 		snprintf(name, sizeof(name), SLAVE_DEV_NAME_FMT, port_id);
 
 		retval = rte_vdev_init(name, "size=64,copy=0");
diff --git a/test/test/test_pmd_perf.c b/test/test/test_pmd_perf.c
index 0e64a581b3..54bc4f6b00 100644
--- a/test/test/test_pmd_perf.c
+++ b/test/test/test_pmd_perf.c
@@ -676,7 +676,7 @@ test_pmd_perf(void)
 	signal(SIGUSR1, signal_handler);
 	signal(SIGUSR2, signal_handler);
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	if (nb_ports < NB_ETHPORTS_USED) {
 		printf("At least %u port(s) used for perf. test\n",
 		       NB_ETHPORTS_USED);
diff --git a/test/test/test_pmd_ring.c b/test/test/test_pmd_ring.c
index 0787e4ebf5..2196201259 100644
--- a/test/test/test_pmd_ring.c
+++ b/test/test/test_pmd_ring.c
@@ -399,7 +399,7 @@ test_pmd_ring(void)
 	int port, cmdl_port0 = -1;
 	uint8_t nb_ports;
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports = rte_eth_dev_count_avail();
 	printf("nb_ports=%d\n", (int)nb_ports);
 
 	/*  create the rings and eth_rings in the test code.