diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index f71d963..2878cfc 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -1357,7 +1357,7 @@ struct cmd_config_speed_all {
 			&link_speed) < 0)
 		return;
 
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		ports[pid].dev_conf.link_speeds = link_speed;
 	}
 
@@ -1851,7 +1851,7 @@ struct cmd_config_rss {
 	struct cmd_config_rss *res = parsed_result;
 	struct rte_eth_rss_conf rss_conf = { .rss_key_len = 0, };
 	int diag;
-	uint8_t i;
+	uint16_t pid;
 
 	if (!strcmp(res->value, "all"))
 		rss_conf.rss_hf = ETH_RSS_IP | ETH_RSS_TCP |
@@ -1885,12 +1885,12 @@ struct cmd_config_rss {
 		return;
 	}
 	rss_conf.rss_key = NULL;
-	for (i = 0; i < rte_eth_dev_count(); i++) {
-		diag = rte_eth_dev_rss_hash_update(i, &rss_conf);
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
+		diag = rte_eth_dev_rss_hash_update(pid, &rss_conf);
 		if (diag < 0)
 			printf("Configuration of RSS hash at ethernet port %d "
 				"failed with error (%d): %s.\n",
-				i, -diag, strerror(-diag));
+				pid, -diag, strerror(-diag));
 	}
 }
 
@@ -4281,9 +4281,11 @@ struct cmd_gso_show_result {
 		       __attribute__((unused)) void *data)
 {
 	struct cmd_gso_show_result *res = parsed_result;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->cmd_pid);
 
-	if (!rte_eth_dev_is_valid_port(res->cmd_pid)) {
-		printf("invalid port id %u\n", res->cmd_pid);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->cmd_pid);
 		return;
 	}
 	if (!strcmp(res->cmd_keyword, "gso")) {
@@ -5293,7 +5295,12 @@ static void cmd_create_bonded_device_parsed(void *parsed_result,
 				port_id);
 
 		/* Update number of ports */
-		nb_ports = rte_eth_dev_count();
+		if (rte_eth_dev_owner_set(port_id, &my_owner) != 0) {
+			printf("Error: cannot own new attached port %d\n",
+			       port_id);
+			return;
+		}
+		nb_ports++;
 		reconfig(port_id, res->socket);
 		rte_eth_promiscuous_enable(port_id);
 	}
@@ -5401,9 +5408,11 @@ static void cmd_set_bond_mon_period_parsed(void *parsed_result,
 {
 	struct cmd_set_bond_mon_period_result *res = parsed_result;
 	int ret;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_num);
 
-	if (res->port_num >= nb_ports) {
-		printf("Port id %d must be less than %d\n", res->port_num, nb_ports);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_num);
 		return;
 	}
 
@@ -5462,10 +5471,11 @@ struct cmd_set_bonding_agg_mode_policy_result {
 {
 	struct cmd_set_bonding_agg_mode_policy_result *res = parsed_result;
 	uint8_t policy = AGG_BANDWIDTH;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_num);
 
-	if (res->port_num >= nb_ports) {
-		printf("Port id %d must be less than %d\n",
-				res->port_num, nb_ports);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_num);
 		return;
 	}
 
@@ -5726,7 +5736,7 @@ static void cmd_set_promisc_mode_parsed(void *parsed_result,
 
 	/* all ports */
 	if (allports) {
-		RTE_ETH_FOREACH_DEV(i) {
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id) {
 			if (enable)
 				rte_eth_promiscuous_enable(i);
 			else
@@ -5806,7 +5816,7 @@ static void cmd_set_allmulti_mode_parsed(void *parsed_result,
 
 	/* all ports */
 	if (allports) {
-		RTE_ETH_FOREACH_DEV(i) {
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id) {
 			if (enable)
 				rte_eth_allmulticast_enable(i);
 			else
@@ -6540,31 +6550,31 @@ static void cmd_showportall_parsed(void *parsed_result,
 	struct cmd_showportall_result *res = parsed_result;
 	if (!strcmp(res->show, "clear")) {
 		if (!strcmp(res->what, "stats"))
-			RTE_ETH_FOREACH_DEV(i)
+			RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 				nic_stats_clear(i);
 		else if (!strcmp(res->what, "xstats"))
-			RTE_ETH_FOREACH_DEV(i)
+			RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 				nic_xstats_clear(i);
 	} else if (!strcmp(res->what, "info"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			port_infos_display(i);
 	else if (!strcmp(res->what, "stats"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			nic_stats_display(i);
 	else if (!strcmp(res->what, "xstats"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			nic_xstats_display(i);
 	else if (!strcmp(res->what, "fdir"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			fdir_get_infos(i);
 	else if (!strcmp(res->what, "stat_qmap"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			nic_stats_mapping_display(i);
 	else if (!strcmp(res->what, "dcb_tc"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			port_dcb_info_display(i);
 	else if (!strcmp(res->what, "cap"))
-		RTE_ETH_FOREACH_DEV(i)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id)
 			port_offload_cap_display(i);
 }
 
@@ -10483,9 +10493,11 @@ struct cmd_flow_director_mask_result {
 	struct cmd_flow_director_mask_result *res = parsed_result;
 	struct rte_eth_fdir_masks *mask;
 	struct rte_port *port;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -10684,9 +10696,11 @@ struct cmd_flow_director_flex_mask_result {
 	uint32_t flow_type_mask;
 	uint16_t i;
 	int ret;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -10840,9 +10854,11 @@ struct cmd_flow_director_flexpayload_result {
 	struct rte_eth_flex_payload_cfg flex_cfg;
 	struct rte_port *port;
 	int ret = 0;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -11560,7 +11576,7 @@ struct cmd_config_l2_tunnel_eth_type_result {
 	entry.l2_tunnel_type = str2fdir_l2_tunnel_type(res->l2_tunnel_type);
 	entry.ether_type = res->eth_type_val;
 
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		rte_eth_dev_l2_tunnel_eth_type_conf(pid, &entry);
 	}
 }
@@ -11676,7 +11692,7 @@ struct cmd_config_l2_tunnel_en_dis_result {
 	else
 		en = 0;
 
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		rte_eth_dev_l2_tunnel_offload_set(pid,
 						  &entry,
 						  ETH_L2_TUNNEL_ENABLE_MASK,
@@ -14202,9 +14218,11 @@ struct cmd_ddp_add_result {
 	char *file_fld[2];
 	int file_num;
 	int ret = -ENOTSUP;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -14284,9 +14302,11 @@ struct cmd_ddp_del_result {
 	uint8_t *buff;
 	uint32_t size;
 	int ret = -ENOTSUP;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -14599,9 +14619,11 @@ struct cmd_ddp_get_list_result {
 	uint32_t i;
 #endif
 	int ret = -ENOTSUP;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(res->port_id);
 
-	if (res->port_id > nb_ports) {
-		printf("Invalid port, range is [0, %d]\n", nb_ports - 1);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", res->port_id);
 		return;
 	}
 
@@ -15821,7 +15843,7 @@ struct cmd_cmdfile_result {
 	if (id == (portid_t)RTE_PORT_ALL) {
 		portid_t pid;
 
-		RTE_ETH_FOREACH_DEV(pid) {
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 			/* check if need_reconfig has been set to 1 */
 			if (ports[pid].need_reconfig == 0)
 				ports[pid].need_reconfig = dev;
diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index df16d2a..bc2a16b 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -2621,7 +2621,7 @@ static int comp_vc_action_rss_queue(struct context *, const struct token *,
 
 	(void)ctx;
 	(void)token;
-	RTE_ETH_FOREACH_DEV(p) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(p, my_owner.id) {
 		if (buf && i == ent)
 			return snprintf(buf, size, "%u", p);
 		++i;
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index cd2ac11..6da471e 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -155,7 +155,7 @@ struct rss_type_info {
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN)) {
 		printf("Valid port range is [0");
-		RTE_ETH_FOREACH_DEV(pid)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 			printf(", %d", pid);
 		printf("]\n");
 		return;
@@ -235,7 +235,7 @@ struct rss_type_info {
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN)) {
 		printf("Valid port range is [0");
-		RTE_ETH_FOREACH_DEV(pid)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 			printf(", %d", pid);
 		printf("]\n");
 		return;
@@ -250,10 +250,11 @@ struct rss_type_info {
 	struct rte_eth_xstat *xstats;
 	int cnt_xstats, idx_xstat;
 	struct rte_eth_xstat_name *xstats_names;
+	const struct rte_eth_dev_owner *owner = rte_eth_dev_owner_get(port_id);
 
 	printf("###### NIC extended statistics for port %-2d\n", port_id);
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		printf("Error: Invalid port number %i\n", port_id);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("Error: invalid/not owned port number %i\n", port_id);
 		return;
 	}
 
@@ -320,7 +321,7 @@ struct rss_type_info {
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN)) {
 		printf("Valid port range is [0");
-		RTE_ETH_FOREACH_DEV(pid)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 			printf(", %d", pid);
 		printf("]\n");
 		return;
@@ -439,7 +440,7 @@ struct rss_type_info {
 
 	if (port_id_is_invalid(port_id, ENABLED_WARN)) {
 		printf("Valid port range is [0");
-		RTE_ETH_FOREACH_DEV(pid)
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 			printf(", %d", pid);
 		printf("]\n");
 		return;
@@ -727,7 +728,10 @@ struct rss_type_info {
 	if (port_id == (portid_t)RTE_PORT_ALL)
 		return 0;
 
-	if (rte_eth_dev_is_valid_port(port_id))
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(port_id);
+
+	if (owner != NULL && owner->id == my_owner.id)
 		return 0;
 
 	if (warning == ENABLED_WARN)
@@ -2309,7 +2313,7 @@ struct igb_ring_desc_16_bytes {
 		return;
 	}
 	nb_pt = 0;
-	RTE_ETH_FOREACH_DEV(i) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(i, my_owner.id) {
 		if (! ((uint64_t)(1ULL << i) & portmask))
 			continue;
 		portlist[nb_pt++] = i;
@@ -2448,8 +2452,11 @@ struct igb_ring_desc_16_bytes {
 void
 setup_gro(const char *onoff, portid_t port_id)
 {
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		printf("invalid port id %u\n", port_id);
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(port_id);
+
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", port_id);
 		return;
 	}
 	if (test_done == 0) {
@@ -2507,11 +2514,13 @@ struct igb_ring_desc_16_bytes {
 {
 	struct rte_gro_param *param;
 	uint32_t max_pkts_num;
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(port_id);
 
 	param = &gro_ports[port_id].param;
 
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		printf("Invalid port id %u.\n", port_id);
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", port_id);
 		return;
 	}
 	if (gro_ports[port_id].enable) {
@@ -2531,8 +2540,11 @@ struct igb_ring_desc_16_bytes {
 void
 setup_gso(const char *mode, portid_t port_id)
 {
-	if (!rte_eth_dev_is_valid_port(port_id)) {
-		printf("invalid port id %u\n", port_id);
+	const struct rte_eth_dev_owner *owner =
+		rte_eth_dev_owner_get(port_id);
+
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("invalid/not owned port id %u\n", port_id);
 		return;
 	}
 	if (strcmp(mode, "on") == 0) {
diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index 84e7a63..63c533c 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -428,7 +428,7 @@
 		if (port_id_is_invalid(port_id, ENABLED_WARN) ||
 			port_id == (portid_t)RTE_PORT_ALL) {
 			printf("Valid port range is [0");
-			RTE_ETH_FOREACH_DEV(pid)
+			RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 				printf(", %d", pid);
 			printf("]\n");
 			return -1;
@@ -489,7 +489,7 @@
 		if (port_id_is_invalid(port_id, ENABLED_WARN) ||
 			port_id == (portid_t)RTE_PORT_ALL) {
 			printf("Valid port range is [0");
-			RTE_ETH_FOREACH_DEV(pid)
+			RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id)
 				printf(", %d", pid);
 			printf("]\n");
 			return -1;
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index c3ab448..a687c80 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -136,6 +136,11 @@
 lcoreid_t nb_lcores;           /**< Number of probed logical cores. */
 
 /*
+ * My port owner structure used to own Ethernet ports.
+ */
+struct rte_eth_dev_owner my_owner; /**< Unique owner. */
+
+/*
  * Test Forwarding Configuration.
  *    nb_fwd_lcores <= nb_cfg_lcores <= nb_lcores
  *    nb_fwd_ports  <= nb_cfg_ports  <= nb_ports
@@ -483,7 +488,7 @@ static int eth_event_callback(portid_t port_id,
 	portid_t pt_id;
 	int i = 0;
 
-	RTE_ETH_FOREACH_DEV(pt_id)
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pt_id, my_owner.id)
 		fwd_ports_ids[i++] = pt_id;
 
 	nb_cfg_ports = nb_ports;
@@ -607,7 +612,7 @@ static int eth_event_callback(portid_t port_id,
 		fwd_lcores[lc_id]->cpuid_idx = lc_id;
 	}
 
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		port = &ports[pid];
 		rte_eth_dev_info_get(pid, &port->dev_info);
 
@@ -733,7 +738,7 @@ static int eth_event_callback(portid_t port_id,
 	queueid_t q;
 
 	/* set socket id according to numa or not */
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		port = &ports[pid];
 		if (nb_rxq > port->dev_info.max_rx_queues) {
 			printf("Fail: nb_rxq(%d) is greater than "
@@ -1027,9 +1032,8 @@ static int eth_event_callback(portid_t port_id,
 	uint64_t tics_per_1sec;
 	uint64_t tics_datum;
 	uint64_t tics_current;
-	uint8_t idx_port, cnt_ports;
+	uint16_t idx_port;
 
-	cnt_ports = rte_eth_dev_count();
 	tics_datum = rte_rdtsc();
 	tics_per_1sec = rte_get_timer_hz();
 #endif
@@ -1044,11 +1048,10 @@ static int eth_event_callback(portid_t port_id,
 			tics_current = rte_rdtsc();
 			if (tics_current - tics_datum >= tics_per_1sec) {
 				/* Periodic bitrate calculation */
-				for (idx_port = 0;
-						idx_port < cnt_ports;
-						idx_port++)
+				RTE_ETH_FOREACH_DEV_OWNED_BY(idx_port,
+							     my_owner.id)
 					rte_stats_bitrate_calc(bitrate_data,
-						idx_port);
+							       idx_port);
 				tics_datum = tics_current;
 			}
 		}
@@ -1386,7 +1389,7 @@ static int eth_event_callback(portid_t port_id,
 	portid_t pi;
 	struct rte_port *port;
 
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		port = &ports[pi];
 		/* Check if there is a port which is not started */
 		if ((port->port_status != RTE_PORT_STARTED) &&
@@ -1404,7 +1407,7 @@ static int eth_event_callback(portid_t port_id,
 	portid_t pi;
 	struct rte_port *port;
 
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		port = &ports[pi];
 		if ((port->port_status != RTE_PORT_STOPPED) &&
 			(port->slave_flag == 0))
@@ -1453,7 +1456,7 @@ static int eth_event_callback(portid_t port_id,
 
 	if(dcb_config)
 		dcb_test = 1;
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		if (pid != pi && pid != (portid_t)RTE_PORT_ALL)
 			continue;
 
@@ -1634,7 +1637,7 @@ static int eth_event_callback(portid_t port_id,
 
 	printf("Stopping ports...\n");
 
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		if (pid != pi && pid != (portid_t)RTE_PORT_ALL)
 			continue;
 
@@ -1677,7 +1680,7 @@ static int eth_event_callback(portid_t port_id,
 
 	printf("Closing ports...\n");
 
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		if (pid != pi && pid != (portid_t)RTE_PORT_ALL)
 			continue;
 
@@ -1728,7 +1731,7 @@ static int eth_event_callback(portid_t port_id,
 
 	printf("Resetting ports...\n");
 
-	RTE_ETH_FOREACH_DEV(pi) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pi, my_owner.id) {
 		if (pid != pi && pid != (portid_t)RTE_PORT_ALL)
 			continue;
 
@@ -1773,6 +1776,12 @@ static int eth_event_callback(portid_t port_id,
 	if (rte_eth_dev_attach(identifier, &pi))
 		return;
 
+	if (rte_eth_dev_owner_set(pi, &my_owner) != 0) {
+		printf("Error: cannot own new attached port %d\n", pi);
+		return;
+	}
+	nb_ports++;
+
 	socket_id = (unsigned)rte_eth_dev_socket_id(pi);
 	/* if socket_id is invalid, set to 0 */
 	if (check_socket_id(socket_id) < 0)
@@ -1780,8 +1789,6 @@ static int eth_event_callback(portid_t port_id,
 	reconfig(pi, socket_id);
 	rte_eth_promiscuous_enable(pi);
 
-	nb_ports = rte_eth_dev_count();
-
 	ports[pi].port_status = RTE_PORT_STOPPED;
 
 	printf("Port %d is attached. Now total ports is %d\n", pi, nb_ports);
@@ -1792,9 +1799,16 @@ static int eth_event_callback(portid_t port_id,
 detach_port(portid_t port_id)
 {
 	char name[RTE_ETH_NAME_MAX_LEN];
+	const struct rte_eth_dev_owner *owner = rte_eth_dev_owner_get(port_id);
 
 	printf("Detaching a port...\n");
 
+	if (owner == NULL || owner->id != my_owner.id) {
+		printf("Failed to detach invalid/not owned port id %u\n",
+		       port_id);
+		return;
+	}
+
 	if (!port_is_closed(port_id)) {
 		printf("Please close port first\n");
 		return;
@@ -1808,7 +1822,7 @@ static int eth_event_callback(portid_t port_id,
 		return;
 	}
 
-	nb_ports = rte_eth_dev_count();
+	nb_ports--;
 
 	printf("Port '%s' is detached. Now total ports is %d\n",
 			name, nb_ports);
@@ -1826,7 +1840,7 @@ static int eth_event_callback(portid_t port_id,
 
 	if (ports != NULL) {
 		no_link_check = 1;
-		RTE_ETH_FOREACH_DEV(pt_id) {
+		RTE_ETH_FOREACH_DEV_OWNED_BY(pt_id, my_owner.id) {
 			printf("\nShutting down port %d...\n", pt_id);
 			fflush(stdout);
 			stop_port(pt_id);
@@ -1858,7 +1872,7 @@ struct pmd_test_command {
 	fflush(stdout);
 	for (count = 0; count <= MAX_CHECK_TIME; count++) {
 		all_ports_up = 1;
-		RTE_ETH_FOREACH_DEV(portid) {
+		RTE_ETH_FOREACH_DEV_OWNED_BY(portid, my_owner.id) {
 			if ((port_mask & (1 << portid)) == 0)
 				continue;
 			memset(&link, 0, sizeof(link));
@@ -2083,7 +2097,7 @@ struct pmd_test_command {
 	portid_t pid;
 	struct rte_port *port;
 
-	RTE_ETH_FOREACH_DEV(pid) {
+	RTE_ETH_FOREACH_DEV_OWNED_BY(pid, my_owner.id) {
 		port = &ports[pid];
 		port->dev_conf.rxmode = rx_mode;
 		port->dev_conf.fdir_conf = fdir_conf;
@@ -2394,7 +2408,12 @@ uint8_t port_is_bonding_slave(portid_t slave_pid)
 	rte_pdump_init(NULL);
 #endif
 
-	nb_ports = (portid_t) rte_eth_dev_count();
+	if (rte_eth_dev_owner_new(&my_owner.id))
+		rte_panic("Failed to get unique owner identifier\n");
+	snprintf(my_owner.name, sizeof(my_owner.name), TESTPMD_OWNER_NAME);
+	RTE_ETH_FOREACH_DEV_OWNED_BY(port_id, RTE_ETH_DEV_NO_OWNER)
+		if (rte_eth_dev_owner_set(port_id, &my_owner) == 0)
+			nb_ports++;
 	if (nb_ports == 0)
 		RTE_LOG(WARNING, EAL, "No probed ethernet devices\n");
 
@@ -2442,7 +2461,7 @@ uint8_t port_is_bonding_slave(portid_t slave_pid)
 		rte_exit(EXIT_FAILURE, "Start ports failed\n");
 
 	/* set all ports to promiscuous mode by default */
-	RTE_ETH_FOREACH_DEV(port_id)
+	RTE_ETH_FOREACH_DEV_OWNED_BY(port_id, my_owner.id)
 		rte_eth_promiscuous_enable(port_id);
 
 	/* Init metrics library */
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 1639d27..7db7d72 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -79,6 +79,8 @@
 #define NUMA_NO_CONFIG 0xFF
 #define UMA_NO_CONFIG  0xFF
 
+#define TESTPMD_OWNER_NAME "TestPMD"
+
 typedef uint8_t  lcoreid_t;
 typedef uint16_t portid_t;
 typedef uint16_t queueid_t;
@@ -409,6 +411,7 @@ struct queue_stats_mappings {
  * nb_fwd_ports <= nb_cfg_ports <= nb_ports
  */
 extern portid_t nb_ports; /**< Number of ethernet ports probed at init time. */
+extern struct rte_eth_dev_owner my_owner; /**< Unique owner. */
 extern portid_t nb_cfg_ports; /**< Number of configured ports. */
 extern portid_t nb_fwd_ports; /**< Number of forwarding ports. */
 extern portid_t fwd_ports_ids[RTE_MAX_ETHPORTS];
