The rte_eth_tap.c PMD creates a device using TUN/TAP interfaces
on the local host. The PMD allows for DPDK and the host to
communicate using a raw device interface on the host and in
the DPDK application. The device created is a Tap device with
a L2 packet header.
Signed-off-by: Keith Wiles <keith.wiles at intel.com>
---
drivers/net/tap/Makefile | 60 +++
drivers/net/tap/rte_eth_tap.c | 872 ++++++++++++++++++++++++++++++++
drivers/net/tap/rte_pmd_tap_version.map | 4 +
3 files changed, 936 insertions(+)
create mode 100644 drivers/net/tap/Makefile
create mode 100644 drivers/net/tap/rte_eth_tap.c
create mode 100644 drivers/net/tap/rte_pmd_tap_version.map
diff --git a/drivers/net/tap/Makefile b/drivers/net/tap/Makefile
new file mode 100644
index 0000000..442a2fe
--- /dev/null
+++ b/drivers/net/tap/Makefile
@@ -0,0 +1,60 @@
+# BSD LICENSE
+#
+# Copyright(c) 2014 John W. Linville <linville at redhat.com>
+# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+# Copyright(c) 2014 6WIND S.A.
+# 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_SDK)/mk/rte.vars.mk
+
+#
+# library name
+#
+LIB = librte_pmd_tap.a
+
+EXPORT_MAP := rte_pmd_tap_version.map
+
+LIBABIVER := 1
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += rte_eth_tap.c
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += lib/librte_eal
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += lib/librte_mempool
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += lib/librte_kvargs
+
+include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
new file mode 100644
index 0000000..027bb35
--- /dev/null
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -0,0 +1,872 @@
+/*-
+ * 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_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_kvargs.h>
+#include <rte_dev.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <poll.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#ifdef __linux__
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#include <linux/if_ether.h>
+#else
+#include <netinet/if_ether.h>
+#endif
+#include <fcntl.h>
+
+#include <poll.h>
+
+/* Linux based path to the TUN device */
+#define TUN_TAP_DEV_PATH "/dev/net/tun"
+
+#define ETH_TAP_IFACE_ARG "iface"
+#define ETH_TAP_SPEED_ARG "speed"
+
+static const char *valid_arguments[] = {
+ ETH_TAP_IFACE_ARG,
+ ETH_TAP_SPEED_ARG,
+ NULL
+};
+
+static const char *drivername = "Tap PMD";
+static int tap_unit = 0;
+
+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
+};
+
+struct tap_info {
+ char name[RTE_ETH_NAME_MAX_LEN]; /* Interface name supplied/given */
+ int speed; /* Speed of interface */
+};
+
+struct pkt_stats {
+ uint64_t opackets; /* Number of output packets */
+ uint64_t ipackets; /* Number of input packets */
+ uint64_t obytes; /* Number of bytes on output */
+ uint64_t ibytes; /* Number of bytes on input */
+ uint64_t errs; /* Number of error packets */
+};
+
+struct rx_queue {
+ struct rte_mempool *mp; /* Mempool for RX packets */
+ uint16_t in_port; /* Port ID */
+ int fd;
+
+ struct pkt_stats stats; /* Stats for this RX queue */
+};
+
+struct tx_queue {
+ int fd;
+ struct pkt_stats stats; /* Stats for this TX queue */
+};
+
+struct pmd_internals {
+ char name[RTE_ETH_NAME_MAX_LEN]; /* Internal Tap device name */
+ uint16_t nb_queues; /* Number of queues supported */
+ uint16_t pad0;
+ struct ether_addr eth_addr; /* Mac address of the device port */
+
+ int if_index; /* IF_INDEX for the port */
+ int fds[RTE_PMD_TAP_MAX_QUEUES]; /* List of all file descriptors */
+
+ struct rx_queue rxq[RTE_PMD_TAP_MAX_QUEUES]; /* List of RX queues */
+ struct tx_queue txq[RTE_PMD_TAP_MAX_QUEUES]; /* List of TX queues */
+};
+
+/*
+ * 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(char * name)
+{
+ struct ifreq ifr;
+ unsigned int features;
+ int fd;
+
+ memset(&ifr, 0, sizeof(struct ifreq));
+
+ ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+ if (name && name[0])
+ strncpy(ifr.ifr_name, name, IFNAMSIZ);
+
+ fd = open(TUN_TAP_DEV_PATH, O_RDWR);
+ if (fd < 0) {
+ RTE_LOG(ERR, PMD, "Unable to create TAP interface");
+ goto error;
+ }
+
+ /* Grab the TUN features to verify we can work */
+ if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
+ RTE_LOG(ERR, PMD, "Unable to get TUN/TAP features\n");
+ goto error;
+ }
+ RTE_LOG(DEBUG, PMD, "TUN/TAP Features %08x\n", features);
+
+ if (!(features & IFF_MULTI_QUEUE) && (RTE_PMD_TAP_MAX_QUEUES > 1)) {
+ RTE_LOG(DEBUG, PMD, "TUN/TAP device only one queue\n");
+ goto error;
+ } else if ((features & IFF_ONE_QUEUE) && (RTE_PMD_TAP_MAX_QUEUES == 1))
{
+ ifr.ifr_flags |= IFF_ONE_QUEUE;
+ RTE_LOG(DEBUG, PMD, "Single queue only support\n");
+ } else {
+ ifr.ifr_flags |= IFF_MULTI_QUEUE;
+ RTE_LOG(DEBUG, PMD, "Multi-queue support for %d queues\n",
+ RTE_PMD_TAP_MAX_QUEUES);
+ }
+
+ /* Set the TUN/TAP configuration and get the name if needed */
+ if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
+ RTE_LOG(ERR, PMD, "Unable to set TUNSETIFF for %s\n",
ifr.ifr_name);
+ perror("TUNSETIFF");
+ goto error;
+ }
+
+ /* Always set the fiile descriptor to non-blocking */
+ if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
+ RTE_LOG(ERR, PMD, "Unable to set to nonblocking\n");
+ perror("F_SETFL, NONBLOCK");
+ goto error;
+ }
+
+ /* If the name is different that new name as default */
+ if (name && strcmp(name, ifr.ifr_name))
+ strcpy(name, ifr.ifr_name);
+
+ 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)
+{
+ int len, n;
+ struct rte_mbuf *mbuf;
+ struct rx_queue *rxq = queue;
+ struct pollfd pfd;
+ uint16_t num_rx;
+ unsigned long num_rx_bytes = 0;
+
+ pfd.events = POLLIN;
+ pfd.fd = rxq->fd;
+ for (num_rx = 0; num_rx < nb_pkts; ) {
+ n = poll(&pfd, 1, 0);
+
+ if (n <= 0)
+ break;
+
+ if (pfd.revents == 0)
+ continue;
+
+ if (pfd.revents & POLLERR) {
+ rxq->stats.errs++;
+ RTE_LOG(ERR, PMD, "Packet Error\n");
+ break;
+ }
+ if (pfd.revents & POLLHUP)
+ RTE_LOG(ERR, PMD, "Peer closed connection\n");
+
+ /* allocate the next mbuf */
+ mbuf = rte_pktmbuf_alloc(rxq->mp);
+ if (unlikely(mbuf == NULL)) {
+ RTE_LOG(ERR, PMD, "Unable to allocate mbuf\n");
+ break;
+ }
+
+ len = read(pfd.fd, rte_pktmbuf_mtod(mbuf, char *),
+ rte_pktmbuf_tailroom(mbuf));
+ if (len <= 0) {
+ RTE_LOG(ERR, PMD, "len %d\n", len);
+ rte_pktmbuf_free(mbuf);
+ break;
+ }
+
+ mbuf->data_len = len;
+ mbuf->pkt_len = len;
+ mbuf->port = rxq->in_port;
+
+ /* account for the receive frame */
+ bufs[num_rx++] = mbuf;
+ num_rx_bytes += mbuf->pkt_len;
+ }
+ 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 rte_mbuf *mbuf;
+ struct tx_queue *txq = queue;
+ struct pollfd pfd;
+ uint16_t num_tx = 0;
+ unsigned long num_tx_bytes = 0;
+ int i, n;
+
+ if (unlikely(nb_pkts == 0))
+ return 0;
+
+ pfd.events = POLLOUT;
+ pfd.fd = txq->fd;
+ for (i = 0; i < nb_pkts; i++) {
+ n = poll(&pfd, 1, 0);
+
+ if (n <= 0)
+ break;
+
+ if (pfd.revents & POLLOUT) {
+ /* copy the tx frame data */
+ mbuf = bufs[num_tx];
+ n = write(pfd.fd, rte_pktmbuf_mtod(mbuf, void*),
+ rte_pktmbuf_pkt_len(mbuf));
+ 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_dev_start(struct rte_eth_dev *dev)
+{
+ /* Force the Link up */
+ dev->data->dev_link.link_status = ETH_LINK_UP;
+
+ return 0;
+}
+
+/*
+ * This function gets called when the current port gets stopped.
+ */
+static void
+tap_dev_stop(struct rte_eth_dev *dev)
+{
+ int i;
+ struct pmd_internals *internals = dev->data->dev_private;
+
+ for (i = 0; i < internals->nb_queues; i++)
+ if (internals->fds[i] != -1)
+ close(internals->fds[i]);
+
+ dev->data->dev_link.link_status = ETH_LINK_DOWN;
+}
+
+static int
+tap_dev_configure(struct rte_eth_dev *dev __rte_unused)
+{
+ return 0;
+}
+
+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->driver_name = drivername;
+ 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 = (uint16_t)internals->nb_queues;
+ dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
+ dev_info->min_rx_bufsize = 0;
+ dev_info->pci_dev = NULL;
+}
+
+static void
+tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
+{
+ unsigned i, imax;
+ unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
+ unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
+ const struct pmd_internals *internal = dev->data->dev_private;
+
+ imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
+ internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
+
+ for (i = 0; i < imax; i++) {
+ igb_stats->q_ipackets[i] = internal->rxq[i].stats.ipackets;
+ igb_stats->q_ibytes[i] = internal->rxq[i].stats.ibytes;
+ rx_total += igb_stats->q_ipackets[i];
+ rx_bytes_total += igb_stats->q_ibytes[i];
+ }
+
+ imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
+ internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
+
+ for (i = 0; i < imax; i++) {
+ igb_stats->q_opackets[i] = internal->txq[i].stats.opackets;
+ igb_stats->q_errors[i] = internal->txq[i].stats.errs;
+ igb_stats->q_obytes[i] = internal->txq[i].stats.obytes;
+ tx_total += igb_stats->q_opackets[i];
+ tx_err_total += igb_stats->q_errors[i];
+ tx_bytes_total += igb_stats->q_obytes[i];
+ }
+
+ igb_stats->ipackets = rx_total;
+ igb_stats->ibytes = rx_bytes_total;
+ igb_stats->opackets = tx_total;
+ igb_stats->oerrors = tx_err_total;
+ igb_stats->obytes = tx_bytes_total;
+}
+
+static void
+tap_stats_reset(struct rte_eth_dev *dev)
+{
+ int i;
+ struct pmd_internals *internal = dev->data->dev_private;
+
+ for (i = 0; i < internal->nb_queues; i++) {
+ internal->rxq[i].stats.ipackets = 0;
+ internal->rxq[i].stats.ibytes = 0;
+ }
+
+ for (i = 0; i < internal->nb_queues; i++) {
+ internal->txq[i].stats.opackets = 0;
+ internal->txq[i].stats.errs = 0;
+ internal->txq[i].stats.obytes = 0;
+ }
+}
+
+static void
+tap_dev_close(struct rte_eth_dev *dev __rte_unused)
+{
+}
+
+static void
+tap_rx_queue_release(void *queue)
+{
+ struct rx_queue *rxq = queue;
+
+ if (rxq && (rxq->fd > 0)) {
+ close(rxq->fd);
+ rxq->fd = -1;
+ }
+}
+
+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 __rte_unused,
+ int wait_to_complete __rte_unused)
+{
+ return 0;
+}
+
+static int
+tap_setup_queue(struct rte_eth_dev *dev,
+ struct pmd_internals *internals,
+ uint16_t qid)
+{
+ struct rx_queue *rx = &internals->rxq[qid];
+ struct tx_queue *tx = &internals->txq[qid];
+ int fd;
+
+ if ((fd = rx->fd) < 0)
+ if ((fd = tx->fd) < 0) {
+ RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n",
+ dev->data->name, qid);
+ if ((fd = tun_alloc(dev->data->name)) < 0) {
+ RTE_LOG(ERR, PMD, "tun_alloc(%s) failed\n",
dev->data->name);
+ return -1;
+ }
+ }
+
+ dev->data->rx_queues[qid] = rx;
+ dev->data->tx_queues[qid] = tx;
+
+ rx->fd = tx->fd = fd;
+
+ return fd;
+}
+
+static int
+tap_rx_queue_setup(struct rte_eth_dev *dev,
+ uint16_t rx_queue_id,
+ uint16_t nb_rx_desc __rte_unused,
+ unsigned int socket_id __rte_unused,
+ const struct rte_eth_rxconf *rx_conf __rte_unused,
+ struct rte_mempool *mp)
+{
+ struct pmd_internals *internals = dev->data->dev_private;
+ uint16_t buf_size;
+ int fd;
+
+ if ((rx_queue_id >= internals->nb_queues) || (mp == NULL)) {
+ RTE_LOG(ERR, PMD, "nb_queues %d mp %p\n", internals->nb_queues,
mp);
+ return -1;
+ }
+
+ internals->rxq[rx_queue_id].mp = mp;
+ internals->rxq[rx_queue_id].in_port = dev->data->port_id;
+
+ /* Now get the space available for data in the mbuf */
+ buf_size = (uint16_t) (rte_pktmbuf_data_room_size(mp) -
+ RTE_PKTMBUF_HEADROOM);
+
+ if (buf_size < ETH_FRAME_LEN) {
+ RTE_LOG(ERR, PMD,
+ "%s: %d bytes will not fit in mbuf (%d bytes)\n",
+ dev->data->name, ETH_FRAME_LEN, buf_size);
+ return -ENOMEM;
+ }
+
+ fd = tap_setup_queue(dev, internals, rx_queue_id);
+ if (fd == -1)
+ return -1;
+
+ internals->fds[rx_queue_id] = fd;
+ RTE_LOG(INFO, PMD, "RX TAP device name %s, qid %d on fd %d\n",
+ dev->data->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
+
+ return 0;
+}
+
+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 = -1;
+
+ if (tx_queue_id >= internals->nb_queues)
+ return -1;
+
+ ret = tap_setup_queue(dev, internals, tx_queue_id);
+
+ RTE_LOG(INFO, PMD, "TX TAP device name %s, qid %d on fd %d\n",
+ dev->data->name, tx_queue_id, internals->txq[tx_queue_id].fd);
+
+ return ret;
+}
+
+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,
+ .link_update = tap_link_update,
+ .stats_get = tap_stats_get,
+ .stats_reset = tap_stats_reset,
+};
+
+#define RTE_USE_GLOBAL_DATA 0x0000
+#define RTE_USE_PRIVATE_DATA 0x0001
+
+static int
+pmd_mac_address(int fd, struct rte_eth_dev *dev, struct ether_addr *addr)
+{
+ struct ifreq ifr;
+
+ if ((fd <= 0) || (dev == NULL) || (addr == NULL))
+ return -1;
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) {
+ RTE_LOG(ERR, PMD, "ioctl failed (SIOCGIFHWADDR) (%s)\n",
+ ifr.ifr_name);
+ return -1;
+ }
+
+ /* Set the host based MAC address to this special MAC format */
+ ifr.ifr_hwaddr.sa_data[0] = 'T';
+ ifr.ifr_hwaddr.sa_data[1] = 'a';
+ ifr.ifr_hwaddr.sa_data[2] = 'p';
+ ifr.ifr_hwaddr.sa_data[3] = '-';
+ ifr.ifr_hwaddr.sa_data[4] = dev->data->port_id;
+ ifr.ifr_hwaddr.sa_data[5] = dev->data->numa_node;
+ if (ioctl(fd, SIOCSIFHWADDR, &ifr) == -1) {
+ RTE_LOG(ERR, PMD, "%s: ioctl failed (SIOCSIFHWADDR) (%s)\n",
+ dev->data->name, ifr.ifr_name);
+ return -1;
+ }
+
+ /*
+ * Set the local application MAC address, needs to be different then
+ * the host based MAC address.
+ */
+ ifr.ifr_hwaddr.sa_data[0] = 'd';
+ ifr.ifr_hwaddr.sa_data[1] = 'n';
+ ifr.ifr_hwaddr.sa_data[2] = 'e';
+ ifr.ifr_hwaddr.sa_data[3] = 't';
+ ifr.ifr_hwaddr.sa_data[4] = dev->data->port_id;
+ ifr.ifr_hwaddr.sa_data[5] = dev->data->numa_node;
+ memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
+
+ return 0;
+}
+
+static int
+rte_eth_dev_create(const char *name, int dev_type,
+ struct rte_eth_dev **eth_dev,
+ const struct eth_dev_ops *dev_ops,
+ void **internals, size_t internal_size,
+ uint16_t flag)
+{
+ char buff[RTE_ETH_NAME_MAX_LEN];
+ int numa_node = rte_socket_id();
+ struct rte_eth_dev *dev = NULL;
+ struct rte_eth_dev_data *data = NULL;
+ void *priv = NULL;
+
+ if ((name == NULL) || (eth_dev == NULL) || (dev_ops == NULL) ||
+ (internals == NULL) || (internal_size == 0)) {
+ RTE_PMD_DEBUG_TRACE("Paramters are invalid\n");
+ return -1;
+ }
+
+ dev = rte_eth_dev_allocate(name, dev_type);
+ if (dev == NULL) {
+ RTE_PMD_DEBUG_TRACE("%s: rte_eth_dev_allocate failed for %s\n",
+ name, buff);
+ goto error;
+ }
+
+ if (flag & RTE_USE_PRIVATE_DATA) {
+ /*
+ * now do all data allocation - for eth_dev structure, dummy
+ * pci driver and internal (private) data
+ */
+ snprintf(buff, sizeof(buff), "D-%s-%d", name, numa_node);
+ data = rte_zmalloc_socket(buff, sizeof(struct rte_eth_dev_data),
+ 0, numa_node);
+ if (data == NULL) {
+ RTE_PMD_DEBUG_TRACE("%s: Unable to allocate memory\n",
+ name);
+ goto error;
+ }
+ /* move the current state of the structure to the new one */
+ rte_memcpy(data, dev->data, sizeof(struct rte_eth_dev_data));
+ dev->data = data; /* Override the current data pointer */
+ } else
+ data = dev->data;
+
+ snprintf(buff, sizeof(buff), "I-%s-%d", name, numa_node);
+ priv = rte_zmalloc_socket(buff, internal_size, 0, numa_node);
+ if (priv == NULL) {
+ RTE_PMD_DEBUG_TRACE("Unable to allocate internal memory %lu\n",
+ internal_size);
+ goto error;
+ }
+
+ /* Setup some default values */
+ dev->dev_ops = dev_ops;
+ data->dev_private = priv;
+ data->port_id = dev->data->port_id;
+ memmove(data->name, dev->data->name, strlen(dev->data->name));
+
+ dev->driver = NULL;
+ data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+ data->kdrv = RTE_KDRV_NONE;
+ data->numa_node = numa_node;
+
+ *eth_dev = dev;
+ *internals = priv;
+
+ return 0;
+error:
+ rte_free(priv);
+
+ if (flag & RTE_USE_PRIVATE_DATA)
+ rte_free(data);
+
+ rte_eth_dev_release_port(dev);
+
+ return -1;
+}
+
+static int
+pmd_init_internals(const char *name, struct tap_info *tap,
+ struct pmd_internals **internals,
+ struct rte_eth_dev **eth_dev)
+{
+ struct rte_eth_dev *dev = NULL;
+ struct pmd_internals *internal = NULL;
+ struct rte_eth_dev_data *data = NULL;
+ int ret, i, fd = -1;
+
+ RTE_LOG(INFO, PMD,
+ "%s: Create TUN/TAP Ethernet device with %d queues on numa
%u\n",
+ name, RTE_PMD_TAP_MAX_QUEUES, rte_socket_id());
+
+ pmd_link.link_speed = tap->speed;
+
+ ret = rte_eth_dev_create(tap->name, RTE_ETH_DEV_VIRTUAL, &dev, &ops,
+ (void **)&internal, sizeof(struct
pmd_internals),
+ RTE_USE_PRIVATE_DATA);
+ if (ret < 0)
+ return -1;
+
+ strncpy(internal->name, tap->name, sizeof(internal->name));
+
+ internal->nb_queues = RTE_PMD_TAP_MAX_QUEUES;
+
+ /* Create the first Tap device */
+ if ((fd = tun_alloc(dev->data->name)) < 0) {
+ RTE_LOG(ERR, PMD, "tun_alloc(%s) failed\n", dev->data->name);
+ rte_free(internal);
+ rte_eth_dev_release_port(dev);
+ return -1;
+ }
+
+ /* Presetup the fds to -1 as being not working */
+ for(i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
+ internal->fds[i] = -1;
+ internal->rxq[i].fd = -1;
+ internal->txq[i].fd = -1;
+ }
+
+ /* Take the TUN/TAP fd and place in the first location */
+ internal->rxq[0].fd = fd;
+ internal->txq[0].fd = fd;
+ internal->fds[0] = fd;
+
+ if (pmd_mac_address(fd, dev, &internal->eth_addr) < 0) {
+ rte_free(internal);
+ rte_eth_dev_release_port(dev);
+ return -1;
+ }
+
+ data = dev->data;
+
+ data->dev_link = pmd_link;
+ data->mac_addrs = &internal->eth_addr;
+
+ data->nb_rx_queues = (uint16_t)internal->nb_queues;
+ data->nb_tx_queues = (uint16_t)internal->nb_queues;
+ data->drv_name = drivername;
+
+ *eth_dev = dev;
+ *internals = internal;
+
+ return 0;
+}
+
+static int
+eth_dev_tap_create(const char *name, struct tap_info *tap)
+{
+ struct pmd_internals *internals = NULL;
+ struct rte_eth_dev *eth_dev = NULL;
+
+ if (pmd_init_internals(name, tap, &internals, ð_dev) < 0)
+ return -1;
+
+ eth_dev->rx_pkt_burst = pmd_rx_burst;
+ eth_dev->tx_pkt_burst = pmd_tx_burst;
+
+ return 0;
+}
+
+static int
+set_interface_name(const char *key __rte_unused,
+ const char *value,
+ void *extra_args)
+{
+ struct tap_info *tap = (struct tap_info *)extra_args;
+
+ if (value)
+ snprintf(tap->name, sizeof(tap->name), "%s", value);
+ else
+ snprintf(tap->name, sizeof(tap->name), "dtap%d", (tap_unit -
1));
+
+ return 0;
+}
+
+static int
+set_interface_speed(const char *key __rte_unused,
+ const char *value,
+ void *extra_args __rte_unused)
+{
+ struct tap_info *tap = (struct tap_info *)extra_args;
+
+ pmd_link.link_speed = (value) ? atoi(value) : ETH_SPEED_NUM_10G;
+ tap->speed = pmd_link.link_speed;
+
+ return 0;
+}
+
+/*
+ * Open a TAP interface device.
+ */
+static int
+pmd_tap_devinit(const char *name, const char *params)
+{
+ int ret = 0;
+ struct rte_kvargs *kvlist;
+ struct tap_info tap_info;
+
+ /* Setup default values */
+ memset(&tap_info, 0, sizeof(tap_info));
+
+ tap_info.speed = ETH_SPEED_NUM_10G;
+ snprintf(tap_info.name, sizeof(tap_info.name), "tap%d", tap_unit++);
+
+ if ((params == NULL) || (params[0] == '\0')) {
+ RTE_LOG(INFO, PMD, "Initializing pmd_tap for %s\n", name);
+
+ ret = eth_dev_tap_create(name, &tap_info);
+ goto leave;
+ }
+
+ RTE_LOG(INFO, PMD, "Initialize %s with params (%s)\n", name, params);
+
+ kvlist = rte_kvargs_parse(params, valid_arguments);
+ if (!kvlist) {
+ ret = eth_dev_tap_create(name, &tap_info);
+ goto leave;
+ }
+
+ if (rte_kvargs_count(kvlist, ETH_TAP_SPEED_ARG) == 1) {
+ ret = rte_kvargs_process(kvlist, ETH_TAP_SPEED_ARG,
+ &set_interface_speed, &tap_info);
+ if (ret < 0)
+ goto leave;
+ } else
+ set_interface_speed(NULL, NULL, &tap_info);
+
+ if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
+ ret = rte_kvargs_process(kvlist, ETH_TAP_IFACE_ARG,
+ &set_interface_name, &tap_info);
+ if (ret < 0)
+ goto leave;
+ } else
+ set_interface_name(NULL, NULL, (void *)&tap_info);
+
+ rte_kvargs_free(kvlist);
+
+leave:
+ if (ret == -1)
+ RTE_LOG(INFO, PMD, "Failed to create pmd_tap for %s\n", name);
+
+ return ret;
+}
+
+/*
+ * detach a TAP device.
+ */
+static int
+pmd_tap_devuninit(const char *name)
+{
+ struct rte_eth_dev *eth_dev = NULL;
+ struct pmd_internals *internals;
+ int i;
+
+ RTE_LOG(INFO, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
+ rte_socket_id());
+
+ if (name == NULL)
+ return 0;
+
+ /* find the ethdev entry */
+ eth_dev = rte_eth_dev_allocated(name);
+ if (eth_dev == NULL)
+ return 0;
+
+ internals = eth_dev->data->dev_private;
+ for (i = 0; i < internals->nb_queues; i++)
+ if (internals->fds[i] != -1)
+ close(internals->fds[i]);
+
+ rte_free(eth_dev->data->dev_private);
+ rte_free(eth_dev->data);
+
+ rte_eth_dev_release_port(eth_dev);
+
+ return 0;
+}
+
+static struct rte_driver pmd_tap_drv = {
+ .type = PMD_VDEV,
+ .init = pmd_tap_devinit,
+ .uninit = pmd_tap_devuninit,
+};
+
+PMD_REGISTER_DRIVER(pmd_tap_drv, eth_tap);
+DRIVER_REGISTER_PARAM_STRING(eth_tap,
+ "iface=<string>,speed=N");
diff --git a/drivers/net/tap/rte_pmd_tap_version.map
b/drivers/net/tap/rte_pmd_tap_version.map
new file mode 100644
index 0000000..61463bf
--- /dev/null
+++ b/drivers/net/tap/rte_pmd_tap_version.map
@@ -0,0 +1,4 @@
+DPDK_16.11 {
+
+ local: *;
+};
--
2.8.0.GIT
