Imported Upstream version 17.05

Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

1 files changed, 1394 insertions, 0 deletions

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
new file mode 100644
index 00000000..e44de027
--- /dev/null
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -0,0 +1,1394 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_common.h>
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_ethdev_vdev.h>
+#include <rte_malloc.h>
+#include <rte_vdev.h>
+#include <rte_kvargs.h>
+#include <rte_net.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/utsname.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdint.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <linux/if_tun.h>
+#include <linux/if_ether.h>
+#include <linux/version.h>
+#include <fcntl.h>
+
+#include <rte_eth_tap.h>
+#include <tap_flow.h>
+#include <tap_netlink.h>
+#include <tap_tcmsgs.h>
+
+/* Linux based path to the TUN device */
+#define TUN_TAP_DEV_PATH        "/dev/net/tun"
+#define DEFAULT_TAP_NAME        "dtap"
+
+#define ETH_TAP_IFACE_ARG       "iface"
+#define ETH_TAP_SPEED_ARG       "speed"
+#define ETH_TAP_REMOTE_ARG      "remote"
+
+#define FLOWER_KERNEL_VERSION KERNEL_VERSION(4, 2, 0)
+#define FLOWER_VLAN_KERNEL_VERSION KERNEL_VERSION(4, 9, 0)
+
+static struct rte_vdev_driver pmd_tap_drv;
+
+static const char *valid_arguments[] = {
+	ETH_TAP_IFACE_ARG,
+	ETH_TAP_SPEED_ARG,
+	ETH_TAP_REMOTE_ARG,
+	NULL
+};
+
+static int tap_unit;
+
+static volatile uint32_t tap_trigger;	/* Rx trigger */
+
+static struct rte_eth_link pmd_link = {
+	.link_speed = ETH_SPEED_NUM_10G,
+	.link_duplex = ETH_LINK_FULL_DUPLEX,
+	.link_status = ETH_LINK_DOWN,
+	.link_autoneg = ETH_LINK_SPEED_AUTONEG
+};
+
+static void
+tap_trigger_cb(int sig __rte_unused)
+{
+	/* Valid trigger values are nonzero */
+	tap_trigger = (tap_trigger + 1) | 0x80000000;
+}
+
+/* Specifies on what netdevices the ioctl should be applied */
+enum ioctl_mode {
+	LOCAL_AND_REMOTE,
+	LOCAL_ONLY,
+	REMOTE_ONLY,
+};
+
+static int
+tap_ioctl(struct pmd_internals *pmd, unsigned long request,
+	  struct ifreq *ifr, int set, enum ioctl_mode mode);
+
+static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
+
+/* Tun/Tap allocation routine
+ *
+ * name is the number of the interface to use, unless NULL to take the host
+ * supplied name.
+ */
+static int
+tun_alloc(struct pmd_internals *pmd, uint16_t qid)
+{
+	struct ifreq ifr;
+#ifdef IFF_MULTI_QUEUE
+	unsigned int features;
+#endif
+	int fd;
+
+	memset(&ifr, 0, sizeof(struct ifreq));
+
+	/*
+	 * Do not set IFF_NO_PI as packet information header will be needed
+	 * to check if a received packet has been truncated.
+	 */
+	ifr.ifr_flags = IFF_TAP;
+	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
+
+	RTE_LOG(DEBUG, PMD, "ifr_name '%s'\n", ifr.ifr_name);
+
+	fd = open(TUN_TAP_DEV_PATH, O_RDWR);
+	if (fd < 0) {
+		RTE_LOG(ERR, PMD, "Unable to create TAP interface");
+		goto error;
+	}
+
+#ifdef IFF_MULTI_QUEUE
+	/* Grab the TUN features to verify we can work multi-queue */
+	if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
+		RTE_LOG(ERR, PMD, "TAP unable to get TUN/TAP features\n");
+		goto error;
+	}
+	RTE_LOG(DEBUG, PMD, "  TAP Features %08x\n", features);
+
+	if (features & IFF_MULTI_QUEUE) {
+		RTE_LOG(DEBUG, PMD, "  Multi-queue support for %d queues\n",
+			RTE_PMD_TAP_MAX_QUEUES);
+		ifr.ifr_flags |= IFF_MULTI_QUEUE;
+	} else
+#endif
+	{
+		ifr.ifr_flags |= IFF_ONE_QUEUE;
+		RTE_LOG(DEBUG, PMD, "  Single queue only support\n");
+	}
+
+	/* Set the TUN/TAP configuration and set the name if needed */
+	if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
+		RTE_LOG(WARNING, PMD,
+			"Unable to set TUNSETIFF for %s\n",
+			ifr.ifr_name);
+		perror("TUNSETIFF");
+		goto error;
+	}
+
+	/* Always set the file descriptor to non-blocking */
+	if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
+		RTE_LOG(WARNING, PMD,
+			"Unable to set %s to nonblocking\n",
+			ifr.ifr_name);
+		perror("F_SETFL, NONBLOCK");
+		goto error;
+	}
+
+	/* Set up trigger to optimize empty Rx bursts */
+	errno = 0;
+	do {
+		struct sigaction sa;
+		int flags = fcntl(fd, F_GETFL);
+
+		if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
+			break;
+		if (sa.sa_handler != tap_trigger_cb) {
+			/*
+			 * Make sure SIGIO is not already taken. This is done
+			 * as late as possible to leave the application a
+			 * chance to set up its own signal handler first.
+			 */
+			if (sa.sa_handler != SIG_IGN &&
+			    sa.sa_handler != SIG_DFL) {
+				errno = EBUSY;
+				break;
+			}
+			sa = (struct sigaction){
+				.sa_flags = SA_RESTART,
+				.sa_handler = tap_trigger_cb,
+			};
+			if (sigaction(SIGIO, &sa, NULL) == -1)
+				break;
+		}
+		/* Enable SIGIO on file descriptor */
+		fcntl(fd, F_SETFL, flags | O_ASYNC);
+		fcntl(fd, F_SETOWN, getpid());
+	} while (0);
+	if (errno) {
+		/* Disable trigger globally in case of error */
+		tap_trigger = 0;
+		RTE_LOG(WARNING, PMD, "Rx trigger disabled: %s\n",
+			strerror(errno));
+	}
+
+	if (qid == 0) {
+		struct ifreq ifr;
+
+		/*
+		 * pmd->eth_addr contains the desired MAC, either from remote
+		 * or from a random assignment. Sync it with the tap netdevice.
+		 */
+		ifr.ifr_hwaddr.sa_family = AF_LOCAL;
+		rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
+			   ETHER_ADDR_LEN);
+		if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
+			goto error;
+
+		pmd->if_index = if_nametoindex(pmd->name);
+		if (!pmd->if_index) {
+			RTE_LOG(ERR, PMD,
+				"Could not find ifindex for %s: rte_flow won't be usable.\n",
+				pmd->name);
+			return fd;
+		}
+		if (!pmd->flower_support)
+			return fd;
+		if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
+			RTE_LOG(ERR, PMD,
+				"Could not create multiq qdisc for %s: rte_flow won't be usable.\n",
+				pmd->name);
+			return fd;
+		}
+		if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
+			RTE_LOG(ERR, PMD,
+				"Could not create multiq qdisc for %s: rte_flow won't be usable.\n",
+				pmd->name);
+			return fd;
+		}
+		if (pmd->remote_if_index) {
+			/*
+			 * Flush usually returns negative value because it tries
+			 * to delete every QDISC (and on a running device, one
+			 * QDISC at least is needed). Ignore negative return
+			 * value.
+			 */
+			qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
+			if (qdisc_create_ingress(pmd->nlsk_fd,
+						 pmd->remote_if_index) < 0)
+				goto remote_fail;
+			LIST_INIT(&pmd->implicit_flows);
+			if (tap_flow_implicit_create(
+				    pmd, TAP_REMOTE_LOCAL_MAC) < 0)
+				goto remote_fail;
+			if (tap_flow_implicit_create(
+				    pmd, TAP_REMOTE_BROADCAST) < 0)
+				goto remote_fail;
+			if (tap_flow_implicit_create(
+				    pmd, TAP_REMOTE_BROADCASTV6) < 0)
+				goto remote_fail;
+			if (tap_flow_implicit_create(
+				    pmd, TAP_REMOTE_TX) < 0)
+				goto remote_fail;
+		}
+	}
+
+	return fd;
+
+remote_fail:
+	RTE_LOG(ERR, PMD,
+		"Could not set up remote flow rules for %s: remote disabled.\n",
+		pmd->name);
+	pmd->remote_if_index = 0;
+	tap_flow_implicit_flush(pmd, NULL);
+	return fd;
+
+error:
+	if (fd > 0)
+		close(fd);
+	return -1;
+}
+
+/* Callback to handle the rx burst of packets to the correct interface and
+ * file descriptor(s) in a multi-queue setup.
+ */
+static uint16_t
+pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+	struct rx_queue *rxq = queue;
+	uint16_t num_rx;
+	unsigned long num_rx_bytes = 0;
+	uint32_t trigger = tap_trigger;
+
+	if (trigger == rxq->trigger_seen)
+		return 0;
+	if (trigger)
+		rxq->trigger_seen = trigger;
+	rte_compiler_barrier();
+	for (num_rx = 0; num_rx < nb_pkts; ) {
+		struct rte_mbuf *mbuf = rxq->pool;
+		struct rte_mbuf *seg = NULL;
+		struct rte_mbuf *new_tail = NULL;
+		uint16_t data_off = rte_pktmbuf_headroom(mbuf);
+		int len;
+
+		len = readv(rxq->fd, *rxq->iovecs,
+			    1 + (rxq->rxmode->enable_scatter ?
+				 rxq->nb_rx_desc : 1));
+		if (len < (int)sizeof(struct tun_pi))
+			break;
+
+		/* Packet couldn't fit in the provided mbuf */
+		if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
+			rxq->stats.ierrors++;
+			continue;
+		}
+
+		len -= sizeof(struct tun_pi);
+
+		mbuf->pkt_len = len;
+		mbuf->port = rxq->in_port;
+		while (1) {
+			struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
+
+			if (unlikely(!buf)) {
+				rxq->stats.rx_nombuf++;
+				/* No new buf has been allocated: do nothing */
+				if (!new_tail || !seg)
+					goto end;
+
+				seg->next = NULL;
+				rte_pktmbuf_free(mbuf);
+
+				goto end;
+			}
+			seg = seg ? seg->next : mbuf;
+			if (rxq->pool == mbuf)
+				rxq->pool = buf;
+			if (new_tail)
+				new_tail->next = buf;
+			new_tail = buf;
+			new_tail->next = seg->next;
+
+			/* iovecs[0] is reserved for packet info (pi) */
+			(*rxq->iovecs)[mbuf->nb_segs].iov_len =
+				buf->buf_len - data_off;
+			(*rxq->iovecs)[mbuf->nb_segs].iov_base =
+				(char *)buf->buf_addr + data_off;
+
+			seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
+			seg->data_off = data_off;
+
+			len -= seg->data_len;
+			if (len <= 0)
+				break;
+			mbuf->nb_segs++;
+			/* First segment has headroom, not the others */
+			data_off = 0;
+		}
+		seg->next = NULL;
+		mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
+						      RTE_PTYPE_ALL_MASK);
+
+		/* account for the receive frame */
+		bufs[num_rx++] = mbuf;
+		num_rx_bytes += mbuf->pkt_len;
+	}
+end:
+	rxq->stats.ipackets += num_rx;
+	rxq->stats.ibytes += num_rx_bytes;
+
+	return num_rx;
+}
+
+/* Callback to handle sending packets from the tap interface
+ */
+static uint16_t
+pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+	struct tx_queue *txq = queue;
+	uint16_t num_tx = 0;
+	unsigned long num_tx_bytes = 0;
+	uint32_t max_size;
+	int i;
+
+	if (unlikely(nb_pkts == 0))
+		return 0;
+
+	max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
+	for (i = 0; i < nb_pkts; i++) {
+		struct rte_mbuf *mbuf = bufs[num_tx];
+		struct iovec iovecs[mbuf->nb_segs + 1];
+		struct tun_pi pi = { .flags = 0 };
+		struct rte_mbuf *seg = mbuf;
+		int n;
+		int j;
+
+		/* stats.errs will be incremented */
+		if (rte_pktmbuf_pkt_len(mbuf) > max_size)
+			break;
+
+		iovecs[0].iov_base = &pi;
+		iovecs[0].iov_len = sizeof(pi);
+		for (j = 1; j <= mbuf->nb_segs; j++) {
+			iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
+			iovecs[j].iov_base =
+				rte_pktmbuf_mtod(seg, void *);
+			seg = seg->next;
+		}
+		/* copy the tx frame data */
+		n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
+		if (n <= 0)
+			break;
+
+		num_tx++;
+		num_tx_bytes += mbuf->pkt_len;
+		rte_pktmbuf_free(mbuf);
+	}
+
+	txq->stats.opackets += num_tx;
+	txq->stats.errs += nb_pkts - num_tx;
+	txq->stats.obytes += num_tx_bytes;
+
+	return num_tx;
+}
+
+static int
+tap_ioctl(struct pmd_internals *pmd, unsigned long request,
+	  struct ifreq *ifr, int set, enum ioctl_mode mode)
+{
+	short req_flags = ifr->ifr_flags;
+	int remote = pmd->remote_if_index &&
+		(mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
+
+	if (!pmd->remote_if_index && mode == REMOTE_ONLY)
+		return 0;
+	/*
+	 * If there is a remote netdevice, apply ioctl on it, then apply it on
+	 * the tap netdevice.
+	 */
+apply:
+	if (remote)
+		snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
+	else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
+		snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
+	switch (request) {
+	case SIOCSIFFLAGS:
+		/* fetch current flags to leave other flags untouched */
+		if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
+			goto error;
+		if (set)
+			ifr->ifr_flags |= req_flags;
+		else
+			ifr->ifr_flags &= ~req_flags;
+		break;
+	case SIOCGIFFLAGS:
+	case SIOCGIFHWADDR:
+	case SIOCSIFHWADDR:
+	case SIOCSIFMTU:
+		break;
+	default:
+		RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
+			pmd->name);
+		return -EINVAL;
+	}
+	if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
+		goto error;
+	if (remote-- && mode == LOCAL_AND_REMOTE)
+		goto apply;
+	return 0;
+
+error:
+	RTE_LOG(ERR, PMD, "%s: ioctl(%lu) failed with error: %s\n",
+		ifr->ifr_name, request, strerror(errno));
+	return -errno;
+}
+
+static int
+tap_link_set_down(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_UP };
+
+	dev->data->dev_link.link_status = ETH_LINK_DOWN;
+	return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
+}
+
+static int
+tap_link_set_up(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_UP };
+
+	dev->data->dev_link.link_status = ETH_LINK_UP;
+	return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
+}
+
+static int
+tap_dev_start(struct rte_eth_dev *dev)
+{
+	int err;
+
+	err = tap_intr_handle_set(dev, 1);
+	if (err)
+		return err;
+	return tap_link_set_up(dev);
+}
+
+/* This function gets called when the current port gets stopped.
+ */
+static void
+tap_dev_stop(struct rte_eth_dev *dev)
+{
+	tap_intr_handle_set(dev, 0);
+	tap_link_set_down(dev);
+}
+
+static int
+tap_dev_configure(struct rte_eth_dev *dev __rte_unused)
+{
+	return 0;
+}
+
+static uint32_t
+tap_dev_speed_capa(void)
+{
+	uint32_t speed = pmd_link.link_speed;
+	uint32_t capa = 0;
+
+	if (speed >= ETH_SPEED_NUM_10M)
+		capa |= ETH_LINK_SPEED_10M;
+	if (speed >= ETH_SPEED_NUM_100M)
+		capa |= ETH_LINK_SPEED_100M;
+	if (speed >= ETH_SPEED_NUM_1G)
+		capa |= ETH_LINK_SPEED_1G;
+	if (speed >= ETH_SPEED_NUM_5G)
+		capa |= ETH_LINK_SPEED_2_5G;
+	if (speed >= ETH_SPEED_NUM_5G)
+		capa |= ETH_LINK_SPEED_5G;
+	if (speed >= ETH_SPEED_NUM_10G)
+		capa |= ETH_LINK_SPEED_10G;
+	if (speed >= ETH_SPEED_NUM_20G)
+		capa |= ETH_LINK_SPEED_20G;
+	if (speed >= ETH_SPEED_NUM_25G)
+		capa |= ETH_LINK_SPEED_25G;
+	if (speed >= ETH_SPEED_NUM_40G)
+		capa |= ETH_LINK_SPEED_40G;
+	if (speed >= ETH_SPEED_NUM_50G)
+		capa |= ETH_LINK_SPEED_50G;
+	if (speed >= ETH_SPEED_NUM_56G)
+		capa |= ETH_LINK_SPEED_56G;
+	if (speed >= ETH_SPEED_NUM_100G)
+		capa |= ETH_LINK_SPEED_100G;
+
+	return capa;
+}
+
+static void
+tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	dev_info->if_index = internals->if_index;
+	dev_info->max_mac_addrs = 1;
+	dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
+	dev_info->max_rx_queues = internals->nb_queues;
+	dev_info->max_tx_queues = internals->nb_queues;
+	dev_info->min_rx_bufsize = 0;
+	dev_info->pci_dev = NULL;
+	dev_info->speed_capa = tap_dev_speed_capa();
+}
+
+static void
+tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
+{
+	unsigned int i, imax;
+	unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
+	unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
+	unsigned long rx_nombuf = 0, ierrors = 0;
+	const struct pmd_internals *pmd = dev->data->dev_private;
+
+	imax = (pmd->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
+		pmd->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
+
+	for (i = 0; i < imax; i++) {
+		tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
+		tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
+		rx_total += tap_stats->q_ipackets[i];
+		rx_bytes_total += tap_stats->q_ibytes[i];
+		rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
+		ierrors += pmd->rxq[i].stats.ierrors;
+
+		tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
+		tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
+		tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
+		tx_total += tap_stats->q_opackets[i];
+		tx_err_total += tap_stats->q_errors[i];
+		tx_bytes_total += tap_stats->q_obytes[i];
+	}
+
+	tap_stats->ipackets = rx_total;
+	tap_stats->ibytes = rx_bytes_total;
+	tap_stats->ierrors = ierrors;
+	tap_stats->rx_nombuf = rx_nombuf;
+	tap_stats->opackets = tx_total;
+	tap_stats->oerrors = tx_err_total;
+	tap_stats->obytes = tx_bytes_total;
+}
+
+static void
+tap_stats_reset(struct rte_eth_dev *dev)
+{
+	int i;
+	struct pmd_internals *pmd = dev->data->dev_private;
+
+	for (i = 0; i < pmd->nb_queues; i++) {
+		pmd->rxq[i].stats.ipackets = 0;
+		pmd->rxq[i].stats.ibytes = 0;
+		pmd->rxq[i].stats.ierrors = 0;
+		pmd->rxq[i].stats.rx_nombuf = 0;
+
+		pmd->txq[i].stats.opackets = 0;
+		pmd->txq[i].stats.errs = 0;
+		pmd->txq[i].stats.obytes = 0;
+	}
+}
+
+static void
+tap_dev_close(struct rte_eth_dev *dev __rte_unused)
+{
+	int i;
+	struct pmd_internals *internals = dev->data->dev_private;
+
+	tap_link_set_down(dev);
+	tap_flow_flush(dev, NULL);
+	tap_flow_implicit_flush(internals, NULL);
+
+	for (i = 0; i < internals->nb_queues; i++) {
+		if (internals->rxq[i].fd != -1)
+			close(internals->rxq[i].fd);
+		internals->rxq[i].fd = -1;
+		internals->txq[i].fd = -1;
+	}
+}
+
+static void
+tap_rx_queue_release(void *queue)
+{
+	struct rx_queue *rxq = queue;
+
+	if (rxq && (rxq->fd > 0)) {
+		close(rxq->fd);
+		rxq->fd = -1;
+		rte_pktmbuf_free(rxq->pool);
+		rte_free(rxq->iovecs);
+		rxq->pool = NULL;
+		rxq->iovecs = NULL;
+	}
+}
+
+static void
+tap_tx_queue_release(void *queue)
+{
+	struct tx_queue *txq = queue;
+
+	if (txq && (txq->fd > 0)) {
+		close(txq->fd);
+		txq->fd = -1;
+	}
+}
+
+static int
+tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
+{
+	struct rte_eth_link *dev_link = &dev->data->dev_link;
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = 0 };
+
+	if (pmd->remote_if_index) {
+		tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
+		if (!(ifr.ifr_flags & IFF_UP) ||
+		    !(ifr.ifr_flags & IFF_RUNNING)) {
+			dev_link->link_status = ETH_LINK_DOWN;
+			return 0;
+		}
+	}
+	tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
+	dev_link->link_status =
+		((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
+		 ETH_LINK_UP :
+		 ETH_LINK_DOWN);
+	return 0;
+}
+
+static void
+tap_promisc_enable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
+
+	dev->data->promiscuous = 1;
+	tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
+	if (pmd->remote_if_index)
+		tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
+}
+
+static void
+tap_promisc_disable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
+
+	dev->data->promiscuous = 0;
+	tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
+	if (pmd->remote_if_index)
+		tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
+}
+
+static void
+tap_allmulti_enable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
+
+	dev->data->all_multicast = 1;
+	tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
+	if (pmd->remote_if_index)
+		tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
+}
+
+static void
+tap_allmulti_disable(struct rte_eth_dev *dev)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
+
+	dev->data->all_multicast = 0;
+	tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
+	if (pmd->remote_if_index)
+		tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
+}
+
+
+static void
+tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr;
+
+	if (is_zero_ether_addr(mac_addr)) {
+		RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
+			dev->data->name);
+		return;
+	}
+	/* Check the actual current MAC address on the tap netdevice */
+	if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY) != 0) {
+		RTE_LOG(ERR, PMD,
+			"%s: couldn't check current tap MAC address\n",
+			dev->data->name);
+		return;
+	}
+	if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
+			       mac_addr))
+		return;
+
+	ifr.ifr_hwaddr.sa_family = AF_LOCAL;
+	rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
+	if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, LOCAL_AND_REMOTE) < 0)
+		return;
+	rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
+	if (pmd->remote_if_index) {
+		/* Replace MAC redirection rule after a MAC change */
+		if (tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC) < 0) {
+			RTE_LOG(ERR, PMD,
+				"%s: Couldn't delete MAC redirection rule\n",
+				dev->data->name);
+			return;
+		}
+		if (tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0)
+			RTE_LOG(ERR, PMD,
+				"%s: Couldn't add MAC redirection rule\n",
+				dev->data->name);
+	}
+}
+
+static int
+tap_setup_queue(struct rte_eth_dev *dev,
+		struct pmd_internals *internals,
+		uint16_t qid)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct rx_queue *rx = &internals->rxq[qid];
+	struct tx_queue *tx = &internals->txq[qid];
+	int fd;
+
+	fd = rx->fd;
+	if (fd < 0) {
+		fd = tx->fd;
+		if (fd < 0) {
+			RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n",
+				pmd->name, qid);
+			fd = tun_alloc(pmd, qid);
+			if (fd < 0) {
+				RTE_LOG(ERR, PMD, "tun_alloc(%s, %d) failed\n",
+					pmd->name, qid);
+				return -1;
+			}
+			if (qid == 0) {
+				struct ifreq ifr;
+
+				ifr.ifr_mtu = dev->data->mtu;
+				if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1,
+					      LOCAL_AND_REMOTE) < 0) {
+					close(fd);
+					return -1;
+				}
+			}
+		}
+	}
+
+	rx->fd = fd;
+	tx->fd = fd;
+	tx->mtu = &dev->data->mtu;
+	rx->rxmode = &dev->data->dev_conf.rxmode;
+
+	return fd;
+}
+
+static int
+rx_setup_queue(struct rte_eth_dev *dev,
+		struct pmd_internals *internals,
+		uint16_t qid)
+{
+	dev->data->rx_queues[qid] = &internals->rxq[qid];
+
+	return tap_setup_queue(dev, internals, qid);
+}
+
+static int
+tx_setup_queue(struct rte_eth_dev *dev,
+		struct pmd_internals *internals,
+		uint16_t qid)
+{
+	dev->data->tx_queues[qid] = &internals->txq[qid];
+
+	return tap_setup_queue(dev, internals, qid);
+}
+
+static int
+tap_rx_queue_setup(struct rte_eth_dev *dev,
+		   uint16_t rx_queue_id,
+		   uint16_t nb_rx_desc,
+		   unsigned int socket_id,
+		   const struct rte_eth_rxconf *rx_conf __rte_unused,
+		   struct rte_mempool *mp)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	struct rx_queue *rxq = &internals->rxq[rx_queue_id];
+	struct rte_mbuf **tmp = &rxq->pool;
+	long iov_max = sysconf(_SC_IOV_MAX);
+	uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
+	struct iovec (*iovecs)[nb_desc + 1];
+	int data_off = RTE_PKTMBUF_HEADROOM;
+	int ret = 0;
+	int fd;
+	int i;
+
+	if ((rx_queue_id >= internals->nb_queues) || !mp) {
+		RTE_LOG(WARNING, PMD,
+			"nb_queues %d too small or mempool NULL\n",
+			internals->nb_queues);
+		return -1;
+	}
+
+	rxq->mp = mp;
+	rxq->trigger_seen = 1; /* force initial burst */
+	rxq->in_port = dev->data->port_id;
+	rxq->nb_rx_desc = nb_desc;
+	iovecs = rte_zmalloc_socket(dev->data->name, sizeof(*iovecs), 0,
+				    socket_id);
+	if (!iovecs) {
+		RTE_LOG(WARNING, PMD,
+			"%s: Couldn't allocate %d RX descriptors\n",
+			dev->data->name, nb_desc);
+		return -ENOMEM;
+	}
+	rxq->iovecs = iovecs;
+
+	fd = rx_setup_queue(dev, internals, rx_queue_id);
+	if (fd == -1) {
+		ret = fd;
+		goto error;
+	}
+
+	(*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
+	(*rxq->iovecs)[0].iov_base = &rxq->pi;
+
+	for (i = 1; i <= nb_desc; i++) {
+		*tmp = rte_pktmbuf_alloc(rxq->mp);
+		if (!*tmp) {
+			RTE_LOG(WARNING, PMD,
+				"%s: couldn't allocate memory for queue %d\n",
+				dev->data->name, rx_queue_id);
+			ret = -ENOMEM;
+			goto error;
+		}
+		(*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
+		(*rxq->iovecs)[i].iov_base =
+			(char *)(*tmp)->buf_addr + data_off;
+		data_off = 0;
+		tmp = &(*tmp)->next;
+	}
+
+	RTE_LOG(DEBUG, PMD, "  RX TAP device name %s, qid %d on fd %d\n",
+		internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
+
+	return 0;
+
+error:
+	rte_pktmbuf_free(rxq->pool);
+	rxq->pool = NULL;
+	rte_free(rxq->iovecs);
+	rxq->iovecs = NULL;
+	return ret;
+}
+
+static int
+tap_tx_queue_setup(struct rte_eth_dev *dev,
+		   uint16_t tx_queue_id,
+		   uint16_t nb_tx_desc __rte_unused,
+		   unsigned int socket_id __rte_unused,
+		   const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	int ret;
+
+	if (tx_queue_id >= internals->nb_queues)
+		return -1;
+
+	ret = tx_setup_queue(dev, internals, tx_queue_id);
+	if (ret == -1)
+		return -1;
+
+	RTE_LOG(DEBUG, PMD, "  TX TAP device name %s, qid %d on fd %d\n",
+		internals->name, tx_queue_id, internals->txq[tx_queue_id].fd);
+
+	return 0;
+}
+
+static int
+tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifreq ifr = { .ifr_mtu = mtu };
+	int err = 0;
+
+	err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
+	if (!err)
+		dev->data->mtu = mtu;
+
+	return err;
+}
+
+static int
+tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
+		     struct ether_addr *mc_addr_set __rte_unused,
+		     uint32_t nb_mc_addr __rte_unused)
+{
+	/*
+	 * Nothing to do actually: the tap has no filtering whatsoever, every
+	 * packet is received.
+	 */
+	return 0;
+}
+
+static int
+tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
+{
+	struct rte_eth_dev *dev = arg;
+	struct pmd_internals *pmd = dev->data->dev_private;
+	struct ifinfomsg *info = NLMSG_DATA(nh);
+
+	if (nh->nlmsg_type != RTM_NEWLINK ||
+	    (info->ifi_index != pmd->if_index &&
+	     info->ifi_index != pmd->remote_if_index))
+		return 0;
+	return tap_link_update(dev, 0);
+}
+
+static void
+tap_dev_intr_handler(void *cb_arg)
+{
+	struct rte_eth_dev *dev = cb_arg;
+	struct pmd_internals *pmd = dev->data->dev_private;
+
+	nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
+}
+
+static int
+tap_intr_handle_set(struct rte_eth_dev *dev, int set)
+{
+	struct pmd_internals *pmd = dev->data->dev_private;
+
+	/* In any case, disable interrupt if the conf is no longer there. */
+	if (!dev->data->dev_conf.intr_conf.lsc) {
+		if (pmd->intr_handle.fd != -1)
+			nl_final(pmd->intr_handle.fd);
+		rte_intr_callback_unregister(
+			&pmd->intr_handle, tap_dev_intr_handler, dev);
+		return 0;
+	}
+	if (set) {
+		pmd->intr_handle.fd = nl_init(RTMGRP_LINK);
+		if (unlikely(pmd->intr_handle.fd == -1))
+			return -EBADF;
+		return rte_intr_callback_register(
+			&pmd->intr_handle, tap_dev_intr_handler, dev);
+	}
+	nl_final(pmd->intr_handle.fd);
+	return rte_intr_callback_unregister(&pmd->intr_handle,
+					    tap_dev_intr_handler, dev);
+}
+
+static const uint32_t*
+tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
+{
+	static const uint32_t ptypes[] = {
+		RTE_PTYPE_INNER_L2_ETHER,
+		RTE_PTYPE_INNER_L2_ETHER_VLAN,
+		RTE_PTYPE_INNER_L2_ETHER_QINQ,
+		RTE_PTYPE_INNER_L3_IPV4,
+		RTE_PTYPE_INNER_L3_IPV4_EXT,
+		RTE_PTYPE_INNER_L3_IPV6,
+		RTE_PTYPE_INNER_L3_IPV6_EXT,
+		RTE_PTYPE_INNER_L4_FRAG,
+		RTE_PTYPE_INNER_L4_UDP,
+		RTE_PTYPE_INNER_L4_TCP,
+		RTE_PTYPE_INNER_L4_SCTP,
+		RTE_PTYPE_L2_ETHER,
+		RTE_PTYPE_L2_ETHER_VLAN,
+		RTE_PTYPE_L2_ETHER_QINQ,
+		RTE_PTYPE_L3_IPV4,
+		RTE_PTYPE_L3_IPV4_EXT,
+		RTE_PTYPE_L3_IPV6_EXT,
+		RTE_PTYPE_L3_IPV6,
+		RTE_PTYPE_L4_FRAG,
+		RTE_PTYPE_L4_UDP,
+		RTE_PTYPE_L4_TCP,
+		RTE_PTYPE_L4_SCTP,
+	};
+
+	return ptypes;
+}
+
+static int
+tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
+		  struct rte_eth_fc_conf *fc_conf)
+{
+	fc_conf->mode = RTE_FC_NONE;
+	return 0;
+}
+
+static int
+tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
+		  struct rte_eth_fc_conf *fc_conf)
+{
+	if (fc_conf->mode != RTE_FC_NONE)
+		return -ENOTSUP;
+	return 0;
+}
+
+static const struct eth_dev_ops ops = {
+	.dev_start              = tap_dev_start,
+	.dev_stop               = tap_dev_stop,
+	.dev_close              = tap_dev_close,
+	.dev_configure          = tap_dev_configure,
+	.dev_infos_get          = tap_dev_info,
+	.rx_queue_setup         = tap_rx_queue_setup,
+	.tx_queue_setup         = tap_tx_queue_setup,
+	.rx_queue_release       = tap_rx_queue_release,
+	.tx_queue_release       = tap_tx_queue_release,
+	.flow_ctrl_get          = tap_flow_ctrl_get,
+	.flow_ctrl_set          = tap_flow_ctrl_set,
+	.link_update            = tap_link_update,
+	.dev_set_link_up        = tap_link_set_up,
+	.dev_set_link_down      = tap_link_set_down,
+	.promiscuous_enable     = tap_promisc_enable,
+	.promiscuous_disable    = tap_promisc_disable,
+	.allmulticast_enable    = tap_allmulti_enable,
+	.allmulticast_disable   = tap_allmulti_disable,
+	.mac_addr_set           = tap_mac_set,
+	.mtu_set                = tap_mtu_set,
+	.set_mc_addr_list       = tap_set_mc_addr_list,
+	.stats_get              = tap_stats_get,
+	.stats_reset            = tap_stats_reset,
+	.dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
+	.filter_ctrl            = tap_dev_filter_ctrl,
+};
+
+static int
+tap_kernel_support(struct pmd_internals *pmd)
+{
+	struct utsname utsname;
+	int ver[3];
+
+	if (uname(&utsname) == -1 ||
+	    sscanf(utsname.release, "%d.%d.%d",
+		   &ver[0], &ver[1], &ver[2]) != 3)
+		return 0;
+	if (KERNEL_VERSION(ver[0], ver[1], ver[2]) >= FLOWER_KERNEL_VERSION)
+		pmd->flower_support = 1;
+	if (KERNEL_VERSION(ver[0], ver[1], ver[2]) >=
+	    FLOWER_VLAN_KERNEL_VERSION)
+		pmd->flower_vlan_support = 1;
+	return 1;
+}
+
+static int
+eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
+		   char *remote_iface)
+{
+	int numa_node = rte_socket_id();
+	struct rte_eth_dev *dev;
+	struct pmd_internals *pmd;
+	struct rte_eth_dev_data *data;
+	int i;
+
+	RTE_LOG(DEBUG, PMD, "  TAP device on numa %u\n", rte_socket_id());
+
+	data = rte_zmalloc_socket(tap_name, sizeof(*data), 0, numa_node);
+	if (!data) {
+		RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
+		goto error_exit;
+	}
+
+	dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
+	if (!dev) {
+		RTE_LOG(ERR, PMD, "TAP Unable to allocate device struct\n");
+		goto error_exit;
+	}
+
+	pmd = dev->data->dev_private;
+	snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
+	pmd->nb_queues = RTE_PMD_TAP_MAX_QUEUES;
+
+	pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (pmd->ioctl_sock == -1) {
+		RTE_LOG(ERR, PMD,
+			"TAP Unable to get a socket for management: %s\n",
+			strerror(errno));
+		goto error_exit;
+	}
+
+	/* Setup some default values */
+	rte_memcpy(data, dev->data, sizeof(*data));
+	data->dev_private = pmd;
+	data->dev_flags = RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
+	data->numa_node = numa_node;
+	data->drv_name = pmd_tap_drv.driver.name;
+
+	data->dev_link = pmd_link;
+	data->mac_addrs = &pmd->eth_addr;
+	data->nb_rx_queues = pmd->nb_queues;
+	data->nb_tx_queues = pmd->nb_queues;
+
+	dev->data = data;
+	dev->dev_ops = &ops;
+	dev->rx_pkt_burst = pmd_rx_burst;
+	dev->tx_pkt_burst = pmd_tx_burst;
+
+	pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
+	pmd->intr_handle.fd = -1;
+
+	/* Presetup the fds to -1 as being not valid */
+	for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
+		pmd->rxq[i].fd = -1;
+		pmd->txq[i].fd = -1;
+	}
+
+	tap_kernel_support(pmd);
+	if (!pmd->flower_support)
+		return 0;
+	LIST_INIT(&pmd->flows);
+	/*
+	 * If no netlink socket can be created, then it will fail when
+	 * creating/destroying flow rules.
+	 */
+	pmd->nlsk_fd = nl_init(0);
+	if (strlen(remote_iface)) {
+		struct ifreq ifr;
+
+		pmd->remote_if_index = if_nametoindex(remote_iface);
+		snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
+			 "%s", remote_iface);
+		if (!pmd->remote_if_index) {
+			RTE_LOG(ERR, PMD, "Could not find %s ifindex: "
+				"remote interface will remain unconfigured\n",
+				remote_iface);
+			return 0;
+		}
+		if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
+			RTE_LOG(ERR, PMD, "Could not get remote MAC address\n");
+			goto error_exit;
+		}
+		rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
+			   ETHER_ADDR_LEN);
+	} else {
+		eth_random_addr((uint8_t *)&pmd->eth_addr);
+	}
+
+	return 0;
+
+error_exit:
+	RTE_LOG(DEBUG, PMD, "TAP Unable to initialize %s\n",
+		rte_vdev_device_name(vdev));
+
+	rte_free(data);
+	return -EINVAL;
+}
+
+static int
+set_interface_name(const char *key __rte_unused,
+		   const char *value,
+		   void *extra_args)
+{
+	char *name = (char *)extra_args;
+
+	if (value)
+		snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s", value);
+	else
+		snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
+			 DEFAULT_TAP_NAME, (tap_unit - 1));
+
+	return 0;
+}
+
+static int
+set_interface_speed(const char *key __rte_unused,
+		    const char *value,
+		    void *extra_args)
+{
+	*(int *)extra_args = (value) ? atoi(value) : ETH_SPEED_NUM_10G;
+
+	return 0;
+}
+
+static int
+set_remote_iface(const char *key __rte_unused,
+		 const char *value,
+		 void *extra_args)
+{
+	char *name = (char *)extra_args;
+
+	if (value)
+		snprintf(name, RTE_ETH_NAME_MAX_LEN, "%s", value);
+
+	return 0;
+}
+
+/* Open a TAP interface device.
+ */
+static int
+rte_pmd_tap_probe(struct rte_vdev_device *dev)
+{
+	const char *name, *params;
+	int ret;
+	struct rte_kvargs *kvlist = NULL;
+	int speed;
+	char tap_name[RTE_ETH_NAME_MAX_LEN];
+	char remote_iface[RTE_ETH_NAME_MAX_LEN];
+
+	name = rte_vdev_device_name(dev);
+	params = rte_vdev_device_args(dev);
+
+	speed = ETH_SPEED_NUM_10G;
+	snprintf(tap_name, sizeof(tap_name), "%s%d",
+		 DEFAULT_TAP_NAME, tap_unit++);
+	memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
+
+	if (params && (params[0] != '\0')) {
+		RTE_LOG(DEBUG, PMD, "paramaters (%s)\n", params);
+
+		kvlist = rte_kvargs_parse(params, valid_arguments);
+		if (kvlist) {
+			if (rte_kvargs_count(kvlist, ETH_TAP_SPEED_ARG) == 1) {
+				ret = rte_kvargs_process(kvlist,
+							 ETH_TAP_SPEED_ARG,
+							 &set_interface_speed,
+							 &speed);
+				if (ret == -1)
+					goto leave;
+			}
+
+			if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
+				ret = rte_kvargs_process(kvlist,
+							 ETH_TAP_IFACE_ARG,
+							 &set_interface_name,
+							 tap_name);
+				if (ret == -1)
+					goto leave;
+			}
+
+			if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
+				ret = rte_kvargs_process(kvlist,
+							 ETH_TAP_REMOTE_ARG,
+							 &set_remote_iface,
+							 remote_iface);
+				if (ret == -1)
+					goto leave;
+			}
+		}
+	}
+	pmd_link.link_speed = speed;
+
+	RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
+		name, tap_name);
+
+	ret = eth_dev_tap_create(dev, tap_name, remote_iface);
+
+leave:
+	if (ret == -1) {
+		RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
+			name, tap_name);
+		tap_unit--;		/* Restore the unit number */
+	}
+	rte_kvargs_free(kvlist);
+
+	return ret;
+}
+
+/* detach a TAP device.
+ */
+static int
+rte_pmd_tap_remove(struct rte_vdev_device *dev)
+{
+	struct rte_eth_dev *eth_dev = NULL;
+	struct pmd_internals *internals;
+	int i;
+
+	RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
+		rte_socket_id());
+
+	/* find the ethdev entry */
+	eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
+	if (!eth_dev)
+		return 0;
+
+	internals = eth_dev->data->dev_private;
+	if (internals->flower_support && internals->nlsk_fd) {
+		tap_flow_flush(eth_dev, NULL);
+		tap_flow_implicit_flush(internals, NULL);
+		nl_final(internals->nlsk_fd);
+	}
+	for (i = 0; i < internals->nb_queues; i++)
+		if (internals->rxq[i].fd != -1)
+			close(internals->rxq[i].fd);
+
+	close(internals->ioctl_sock);
+	rte_free(eth_dev->data->dev_private);
+	rte_free(eth_dev->data);
+
+	rte_eth_dev_release_port(eth_dev);
+
+	return 0;
+}
+
+static struct rte_vdev_driver pmd_tap_drv = {
+	.probe = rte_pmd_tap_probe,
+	.remove = rte_pmd_tap_remove,
+};
+RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
+RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
+RTE_PMD_REGISTER_PARAM_STRING(net_tap,
+			      ETH_TAP_IFACE_ARG "=<string> "
+			      ETH_TAP_SPEED_ARG "=<int> "
+			      ETH_TAP_REMOTE_ARG "=<string>");