4 * Copyright(c) 2016 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <rte_atomic.h>
35 #include <rte_common.h>
37 #include <rte_ethdev.h>
38 #include <rte_malloc.h>
40 #include <rte_kvargs.h>
42 #include <sys/types.h>
44 #include <sys/socket.h>
45 #include <sys/ioctl.h>
51 #include <arpa/inet.h>
53 #include <linux/if_tun.h>
54 #include <linux/if_ether.h>
57 /* Linux based path to the TUN device */
58 #define TUN_TAP_DEV_PATH "/dev/net/tun"
59 #define DEFAULT_TAP_NAME "dtap"
61 #define ETH_TAP_IFACE_ARG "iface"
62 #define ETH_TAP_SPEED_ARG "speed"
64 #ifdef IFF_MULTI_QUEUE
65 #define RTE_PMD_TAP_MAX_QUEUES 16
67 #define RTE_PMD_TAP_MAX_QUEUES 1
70 static struct rte_vdev_driver pmd_tap_drv;
72 static const char *valid_arguments[] = {
80 static volatile uint32_t tap_trigger; /* Rx trigger */
82 static struct rte_eth_link pmd_link = {
83 .link_speed = ETH_SPEED_NUM_10G,
84 .link_duplex = ETH_LINK_FULL_DUPLEX,
85 .link_status = ETH_LINK_DOWN,
86 .link_autoneg = ETH_LINK_SPEED_AUTONEG
90 uint64_t opackets; /* Number of output packets */
91 uint64_t ipackets; /* Number of input packets */
92 uint64_t obytes; /* Number of bytes on output */
93 uint64_t ibytes; /* Number of bytes on input */
94 uint64_t errs; /* Number of error packets */
98 struct rte_mempool *mp; /* Mempool for RX packets */
99 uint32_t trigger_seen; /* Last seen Rx trigger value */
100 uint16_t in_port; /* Port ID */
103 struct pkt_stats stats; /* Stats for this RX queue */
108 struct pkt_stats stats; /* Stats for this TX queue */
111 struct pmd_internals {
112 char name[RTE_ETH_NAME_MAX_LEN]; /* Internal Tap device name */
113 uint16_t nb_queues; /* Number of queues supported */
114 struct ether_addr eth_addr; /* Mac address of the device port */
116 int if_index; /* IF_INDEX for the port */
117 int ioctl_sock; /* socket for ioctl calls */
119 struct rx_queue rxq[RTE_PMD_TAP_MAX_QUEUES]; /* List of RX queues */
120 struct tx_queue txq[RTE_PMD_TAP_MAX_QUEUES]; /* List of TX queues */
124 tap_trigger_cb(int sig __rte_unused)
126 /* Valid trigger values are nonzero */
127 tap_trigger = (tap_trigger + 1) | 0x80000000;
131 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
132 struct ifreq *ifr, int set);
134 /* Tun/Tap allocation routine
136 * name is the number of the interface to use, unless NULL to take the host
140 tun_alloc(struct pmd_internals *pmd, uint16_t qid)
143 #ifdef IFF_MULTI_QUEUE
144 unsigned int features;
148 memset(&ifr, 0, sizeof(struct ifreq));
150 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
151 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
153 RTE_LOG(DEBUG, PMD, "ifr_name '%s'\n", ifr.ifr_name);
155 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
157 RTE_LOG(ERR, PMD, "Unable to create TAP interface");
161 #ifdef IFF_MULTI_QUEUE
162 /* Grab the TUN features to verify we can work multi-queue */
163 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
164 RTE_LOG(ERR, PMD, "TAP unable to get TUN/TAP features\n");
167 RTE_LOG(DEBUG, PMD, " TAP Features %08x\n", features);
169 if (features & IFF_MULTI_QUEUE) {
170 RTE_LOG(DEBUG, PMD, " Multi-queue support for %d queues\n",
171 RTE_PMD_TAP_MAX_QUEUES);
172 ifr.ifr_flags |= IFF_MULTI_QUEUE;
176 ifr.ifr_flags |= IFF_ONE_QUEUE;
177 RTE_LOG(DEBUG, PMD, " Single queue only support\n");
180 /* Set the TUN/TAP configuration and set the name if needed */
181 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
182 RTE_LOG(WARNING, PMD,
183 "Unable to set TUNSETIFF for %s\n",
189 /* Always set the file descriptor to non-blocking */
190 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
191 RTE_LOG(WARNING, PMD,
192 "Unable to set %s to nonblocking\n",
194 perror("F_SETFL, NONBLOCK");
198 /* Set up trigger to optimize empty Rx bursts */
202 int flags = fcntl(fd, F_GETFL);
204 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
206 if (sa.sa_handler != tap_trigger_cb) {
208 * Make sure SIGIO is not already taken. This is done
209 * as late as possible to leave the application a
210 * chance to set up its own signal handler first.
212 if (sa.sa_handler != SIG_IGN &&
213 sa.sa_handler != SIG_DFL) {
217 sa = (struct sigaction){
218 .sa_flags = SA_RESTART,
219 .sa_handler = tap_trigger_cb,
221 if (sigaction(SIGIO, &sa, NULL) == -1)
224 /* Enable SIGIO on file descriptor */
225 fcntl(fd, F_SETFL, flags | O_ASYNC);
226 fcntl(fd, F_SETOWN, getpid());
229 /* Disable trigger globally in case of error */
231 RTE_LOG(WARNING, PMD, "Rx trigger disabled: %s\n",
238 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0) < 0)
240 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
252 /* Callback to handle the rx burst of packets to the correct interface and
253 * file descriptor(s) in a multi-queue setup.
256 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
259 struct rte_mbuf *mbuf;
260 struct rx_queue *rxq = queue;
262 unsigned long num_rx_bytes = 0;
263 uint32_t trigger = tap_trigger;
265 if (trigger == rxq->trigger_seen)
268 rxq->trigger_seen = trigger;
269 rte_compiler_barrier();
270 for (num_rx = 0; num_rx < nb_pkts; ) {
271 /* allocate the next mbuf */
272 mbuf = rte_pktmbuf_alloc(rxq->mp);
273 if (unlikely(!mbuf)) {
274 RTE_LOG(WARNING, PMD, "TAP unable to allocate mbuf\n");
278 len = read(rxq->fd, rte_pktmbuf_mtod(mbuf, char *),
279 rte_pktmbuf_tailroom(mbuf));
281 rte_pktmbuf_free(mbuf);
285 mbuf->data_len = len;
287 mbuf->port = rxq->in_port;
289 /* account for the receive frame */
290 bufs[num_rx++] = mbuf;
291 num_rx_bytes += mbuf->pkt_len;
293 rxq->stats.ipackets += num_rx;
294 rxq->stats.ibytes += num_rx_bytes;
299 /* Callback to handle sending packets from the tap interface
302 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
304 struct rte_mbuf *mbuf;
305 struct tx_queue *txq = queue;
307 unsigned long num_tx_bytes = 0;
310 if (unlikely(nb_pkts == 0))
313 for (i = 0; i < nb_pkts; i++) {
314 /* copy the tx frame data */
317 rte_pktmbuf_mtod(mbuf, void *),
318 rte_pktmbuf_pkt_len(mbuf));
323 num_tx_bytes += mbuf->pkt_len;
324 rte_pktmbuf_free(mbuf);
327 txq->stats.opackets += num_tx;
328 txq->stats.errs += nb_pkts - num_tx;
329 txq->stats.obytes += num_tx_bytes;
335 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
336 struct ifreq *ifr, int set)
338 short req_flags = ifr->ifr_flags;
340 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
343 /* fetch current flags to leave other flags untouched */
344 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
347 ifr->ifr_flags |= req_flags;
349 ifr->ifr_flags &= ~req_flags;
356 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
360 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
365 RTE_LOG(ERR, PMD, "%s: ioctl(%lu) failed with error: %s\n",
366 ifr->ifr_name, request, strerror(errno));
371 tap_link_set_down(struct rte_eth_dev *dev)
373 struct pmd_internals *pmd = dev->data->dev_private;
374 struct ifreq ifr = { .ifr_flags = IFF_UP };
376 dev->data->dev_link.link_status = ETH_LINK_DOWN;
377 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
381 tap_link_set_up(struct rte_eth_dev *dev)
383 struct pmd_internals *pmd = dev->data->dev_private;
384 struct ifreq ifr = { .ifr_flags = IFF_UP };
386 dev->data->dev_link.link_status = ETH_LINK_UP;
387 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
391 tap_dev_start(struct rte_eth_dev *dev)
393 return tap_link_set_up(dev);
396 /* This function gets called when the current port gets stopped.
399 tap_dev_stop(struct rte_eth_dev *dev)
401 tap_link_set_down(dev);
405 tap_dev_configure(struct rte_eth_dev *dev __rte_unused)
411 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
413 struct pmd_internals *internals = dev->data->dev_private;
415 dev_info->if_index = internals->if_index;
416 dev_info->max_mac_addrs = 1;
417 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
418 dev_info->max_rx_queues = internals->nb_queues;
419 dev_info->max_tx_queues = internals->nb_queues;
420 dev_info->min_rx_bufsize = 0;
421 dev_info->pci_dev = NULL;
425 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
427 unsigned int i, imax;
428 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
429 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
430 const struct pmd_internals *pmd = dev->data->dev_private;
432 imax = (pmd->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
433 pmd->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
435 for (i = 0; i < imax; i++) {
436 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
437 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
438 rx_total += tap_stats->q_ipackets[i];
439 rx_bytes_total += tap_stats->q_ibytes[i];
441 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
442 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
443 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
444 tx_total += tap_stats->q_opackets[i];
445 tx_err_total += tap_stats->q_errors[i];
446 tx_bytes_total += tap_stats->q_obytes[i];
449 tap_stats->ipackets = rx_total;
450 tap_stats->ibytes = rx_bytes_total;
451 tap_stats->opackets = tx_total;
452 tap_stats->oerrors = tx_err_total;
453 tap_stats->obytes = tx_bytes_total;
457 tap_stats_reset(struct rte_eth_dev *dev)
460 struct pmd_internals *pmd = dev->data->dev_private;
462 for (i = 0; i < pmd->nb_queues; i++) {
463 pmd->rxq[i].stats.ipackets = 0;
464 pmd->rxq[i].stats.ibytes = 0;
466 pmd->txq[i].stats.opackets = 0;
467 pmd->txq[i].stats.errs = 0;
468 pmd->txq[i].stats.obytes = 0;
473 tap_dev_close(struct rte_eth_dev *dev __rte_unused)
476 struct pmd_internals *internals = dev->data->dev_private;
478 tap_link_set_down(dev);
480 for (i = 0; i < internals->nb_queues; i++) {
481 if (internals->rxq[i].fd != -1)
482 close(internals->rxq[i].fd);
483 internals->rxq[i].fd = -1;
484 internals->txq[i].fd = -1;
489 tap_rx_queue_release(void *queue)
491 struct rx_queue *rxq = queue;
493 if (rxq && (rxq->fd > 0)) {
500 tap_tx_queue_release(void *queue)
502 struct tx_queue *txq = queue;
504 if (txq && (txq->fd > 0)) {
511 tap_link_update(struct rte_eth_dev *dev __rte_unused,
512 int wait_to_complete __rte_unused)
518 tap_promisc_enable(struct rte_eth_dev *dev)
520 struct pmd_internals *pmd = dev->data->dev_private;
521 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
523 dev->data->promiscuous = 1;
524 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
528 tap_promisc_disable(struct rte_eth_dev *dev)
530 struct pmd_internals *pmd = dev->data->dev_private;
531 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
533 dev->data->promiscuous = 0;
534 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
538 tap_allmulti_enable(struct rte_eth_dev *dev)
540 struct pmd_internals *pmd = dev->data->dev_private;
541 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
543 dev->data->all_multicast = 1;
544 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
548 tap_allmulti_disable(struct rte_eth_dev *dev)
550 struct pmd_internals *pmd = dev->data->dev_private;
551 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
553 dev->data->all_multicast = 0;
554 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
559 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
561 struct pmd_internals *pmd = dev->data->dev_private;
564 if (is_zero_ether_addr(mac_addr)) {
565 RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
570 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
571 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
572 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1) < 0)
574 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
578 tap_setup_queue(struct rte_eth_dev *dev,
579 struct pmd_internals *internals,
582 struct pmd_internals *pmd = dev->data->dev_private;
583 struct rx_queue *rx = &internals->rxq[qid];
584 struct tx_queue *tx = &internals->txq[qid];
591 RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n",
593 fd = tun_alloc(pmd, qid);
595 RTE_LOG(ERR, PMD, "tun_alloc(%s, %d) failed\n",
602 ifr.ifr_mtu = dev->data->mtu;
603 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1) < 0) {
618 rx_setup_queue(struct rte_eth_dev *dev,
619 struct pmd_internals *internals,
622 dev->data->rx_queues[qid] = &internals->rxq[qid];
624 return tap_setup_queue(dev, internals, qid);
628 tx_setup_queue(struct rte_eth_dev *dev,
629 struct pmd_internals *internals,
632 dev->data->tx_queues[qid] = &internals->txq[qid];
634 return tap_setup_queue(dev, internals, qid);
638 tap_rx_queue_setup(struct rte_eth_dev *dev,
639 uint16_t rx_queue_id,
640 uint16_t nb_rx_desc __rte_unused,
641 unsigned int socket_id __rte_unused,
642 const struct rte_eth_rxconf *rx_conf __rte_unused,
643 struct rte_mempool *mp)
645 struct pmd_internals *internals = dev->data->dev_private;
649 if ((rx_queue_id >= internals->nb_queues) || !mp) {
650 RTE_LOG(WARNING, PMD,
651 "nb_queues %d too small or mempool NULL\n",
652 internals->nb_queues);
656 internals->rxq[rx_queue_id].mp = mp;
657 internals->rxq[rx_queue_id].trigger_seen = 1; /* force initial burst */
658 internals->rxq[rx_queue_id].in_port = dev->data->port_id;
660 /* Now get the space available for data in the mbuf */
661 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
662 RTE_PKTMBUF_HEADROOM);
664 if (buf_size < ETH_FRAME_LEN) {
665 RTE_LOG(WARNING, PMD,
666 "%s: %d bytes will not fit in mbuf (%d bytes)\n",
667 dev->data->name, ETH_FRAME_LEN, buf_size);
671 fd = rx_setup_queue(dev, internals, rx_queue_id);
675 RTE_LOG(DEBUG, PMD, " RX TAP device name %s, qid %d on fd %d\n",
676 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
682 tap_tx_queue_setup(struct rte_eth_dev *dev,
683 uint16_t tx_queue_id,
684 uint16_t nb_tx_desc __rte_unused,
685 unsigned int socket_id __rte_unused,
686 const struct rte_eth_txconf *tx_conf __rte_unused)
688 struct pmd_internals *internals = dev->data->dev_private;
691 if (tx_queue_id >= internals->nb_queues)
694 ret = tx_setup_queue(dev, internals, tx_queue_id);
698 RTE_LOG(DEBUG, PMD, " TX TAP device name %s, qid %d on fd %d\n",
699 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd);
705 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
707 struct pmd_internals *pmd = dev->data->dev_private;
708 struct ifreq ifr = { .ifr_mtu = mtu };
711 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1);
713 dev->data->mtu = mtu;
718 static const struct eth_dev_ops ops = {
719 .dev_start = tap_dev_start,
720 .dev_stop = tap_dev_stop,
721 .dev_close = tap_dev_close,
722 .dev_configure = tap_dev_configure,
723 .dev_infos_get = tap_dev_info,
724 .rx_queue_setup = tap_rx_queue_setup,
725 .tx_queue_setup = tap_tx_queue_setup,
726 .rx_queue_release = tap_rx_queue_release,
727 .tx_queue_release = tap_tx_queue_release,
728 .link_update = tap_link_update,
729 .dev_set_link_up = tap_link_set_up,
730 .dev_set_link_down = tap_link_set_down,
731 .promiscuous_enable = tap_promisc_enable,
732 .promiscuous_disable = tap_promisc_disable,
733 .allmulticast_enable = tap_allmulti_enable,
734 .allmulticast_disable = tap_allmulti_disable,
735 .mac_addr_set = tap_mac_set,
736 .mtu_set = tap_mtu_set,
737 .stats_get = tap_stats_get,
738 .stats_reset = tap_stats_reset,
742 eth_dev_tap_create(const char *name, char *tap_name)
744 int numa_node = rte_socket_id();
745 struct rte_eth_dev *dev = NULL;
746 struct pmd_internals *pmd = NULL;
747 struct rte_eth_dev_data *data = NULL;
750 RTE_LOG(DEBUG, PMD, " TAP device on numa %u\n", rte_socket_id());
752 data = rte_zmalloc_socket(tap_name, sizeof(*data), 0, numa_node);
754 RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
758 pmd = rte_zmalloc_socket(tap_name, sizeof(*pmd), 0, numa_node);
760 RTE_LOG(ERR, PMD, "TAP Unable to allocate internal struct\n");
764 /* name in allocation and data->name must be consistent */
765 snprintf(data->name, sizeof(data->name), "%s", name);
766 dev = rte_eth_dev_allocate(name);
768 RTE_LOG(ERR, PMD, "TAP Unable to allocate device struct\n");
772 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
774 pmd->nb_queues = RTE_PMD_TAP_MAX_QUEUES;
776 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
777 if (pmd->ioctl_sock == -1) {
779 "TAP Unable to get a socket for management: %s\n",
784 /* Setup some default values */
785 data->dev_private = pmd;
786 data->port_id = dev->data->port_id;
787 data->mtu = dev->data->mtu;
788 data->dev_flags = RTE_ETH_DEV_DETACHABLE;
789 data->kdrv = RTE_KDRV_NONE;
790 data->drv_name = pmd_tap_drv.driver.name;
791 data->numa_node = numa_node;
793 data->dev_link = pmd_link;
794 data->mac_addrs = &pmd->eth_addr;
795 data->nb_rx_queues = pmd->nb_queues;
796 data->nb_tx_queues = pmd->nb_queues;
801 dev->rx_pkt_burst = pmd_rx_burst;
802 dev->tx_pkt_burst = pmd_tx_burst;
804 /* Presetup the fds to -1 as being not valid */
805 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
813 RTE_LOG(DEBUG, PMD, "TAP Unable to initialize %s\n", name);
818 rte_eth_dev_release_port(dev);
824 set_interface_name(const char *key __rte_unused,
828 char *name = (char *)extra_args;
831 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s", value);
833 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
834 DEFAULT_TAP_NAME, (tap_unit - 1));
840 set_interface_speed(const char *key __rte_unused,
844 *(int *)extra_args = (value) ? atoi(value) : ETH_SPEED_NUM_10G;
849 /* Open a TAP interface device.
852 rte_pmd_tap_probe(const char *name, const char *params)
855 struct rte_kvargs *kvlist = NULL;
857 char tap_name[RTE_ETH_NAME_MAX_LEN];
859 speed = ETH_SPEED_NUM_10G;
860 snprintf(tap_name, sizeof(tap_name), "%s%d",
861 DEFAULT_TAP_NAME, tap_unit++);
863 if (params && (params[0] != '\0')) {
864 RTE_LOG(DEBUG, PMD, "paramaters (%s)\n", params);
866 kvlist = rte_kvargs_parse(params, valid_arguments);
868 if (rte_kvargs_count(kvlist, ETH_TAP_SPEED_ARG) == 1) {
869 ret = rte_kvargs_process(kvlist,
871 &set_interface_speed,
877 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
878 ret = rte_kvargs_process(kvlist,
887 pmd_link.link_speed = speed;
889 RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
892 ret = eth_dev_tap_create(name, tap_name);
896 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
898 tap_unit--; /* Restore the unit number */
900 rte_kvargs_free(kvlist);
905 /* detach a TAP device.
908 rte_pmd_tap_remove(const char *name)
910 struct rte_eth_dev *eth_dev = NULL;
911 struct pmd_internals *internals;
914 RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
917 /* find the ethdev entry */
918 eth_dev = rte_eth_dev_allocated(name);
922 internals = eth_dev->data->dev_private;
923 for (i = 0; i < internals->nb_queues; i++)
924 if (internals->rxq[i].fd != -1)
925 close(internals->rxq[i].fd);
927 close(internals->ioctl_sock);
928 rte_free(eth_dev->data->dev_private);
929 rte_free(eth_dev->data);
931 rte_eth_dev_release_port(eth_dev);
936 static struct rte_vdev_driver pmd_tap_drv = {
937 .probe = rte_pmd_tap_probe,
938 .remove = rte_pmd_tap_remove,
940 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
941 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
942 RTE_PMD_REGISTER_PARAM_STRING(net_tap, "iface=<string>,speed=N");