--- /dev/null
+/*-
+ * 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 = π
+ 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>");
Code Review / deb_dpdk.git / blobdiff