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>
43 #include <sys/types.h>
45 #include <sys/socket.h>
46 #include <sys/ioctl.h>
52 #include <arpa/inet.h>
54 #include <linux/if_tun.h>
55 #include <linux/if_ether.h>
58 #include <rte_eth_tap.h>
60 /* Linux based path to the TUN device */
61 #define TUN_TAP_DEV_PATH "/dev/net/tun"
62 #define DEFAULT_TAP_NAME "dtap"
64 #define ETH_TAP_IFACE_ARG "iface"
65 #define ETH_TAP_SPEED_ARG "speed"
67 #ifdef IFF_MULTI_QUEUE
68 #define RTE_PMD_TAP_MAX_QUEUES 16
70 #define RTE_PMD_TAP_MAX_QUEUES 1
73 static struct rte_vdev_driver pmd_tap_drv;
75 static const char *valid_arguments[] = {
83 static volatile uint32_t tap_trigger; /* Rx trigger */
85 static struct rte_eth_link pmd_link = {
86 .link_speed = ETH_SPEED_NUM_10G,
87 .link_duplex = ETH_LINK_FULL_DUPLEX,
88 .link_status = ETH_LINK_DOWN,
89 .link_autoneg = ETH_LINK_SPEED_AUTONEG
93 tap_trigger_cb(int sig __rte_unused)
95 /* Valid trigger values are nonzero */
96 tap_trigger = (tap_trigger + 1) | 0x80000000;
100 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
101 struct ifreq *ifr, int set);
103 /* Tun/Tap allocation routine
105 * name is the number of the interface to use, unless NULL to take the host
109 tun_alloc(struct pmd_internals *pmd, uint16_t qid)
112 #ifdef IFF_MULTI_QUEUE
113 unsigned int features;
117 memset(&ifr, 0, sizeof(struct ifreq));
119 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
120 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
122 RTE_LOG(DEBUG, PMD, "ifr_name '%s'\n", ifr.ifr_name);
124 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
126 RTE_LOG(ERR, PMD, "Unable to create TAP interface");
130 #ifdef IFF_MULTI_QUEUE
131 /* Grab the TUN features to verify we can work multi-queue */
132 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
133 RTE_LOG(ERR, PMD, "TAP unable to get TUN/TAP features\n");
136 RTE_LOG(DEBUG, PMD, " TAP Features %08x\n", features);
138 if (features & IFF_MULTI_QUEUE) {
139 RTE_LOG(DEBUG, PMD, " Multi-queue support for %d queues\n",
140 RTE_PMD_TAP_MAX_QUEUES);
141 ifr.ifr_flags |= IFF_MULTI_QUEUE;
145 ifr.ifr_flags |= IFF_ONE_QUEUE;
146 RTE_LOG(DEBUG, PMD, " Single queue only support\n");
149 /* Set the TUN/TAP configuration and set the name if needed */
150 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
151 RTE_LOG(WARNING, PMD,
152 "Unable to set TUNSETIFF for %s\n",
158 /* Always set the file descriptor to non-blocking */
159 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
160 RTE_LOG(WARNING, PMD,
161 "Unable to set %s to nonblocking\n",
163 perror("F_SETFL, NONBLOCK");
167 /* Set up trigger to optimize empty Rx bursts */
171 int flags = fcntl(fd, F_GETFL);
173 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
175 if (sa.sa_handler != tap_trigger_cb) {
177 * Make sure SIGIO is not already taken. This is done
178 * as late as possible to leave the application a
179 * chance to set up its own signal handler first.
181 if (sa.sa_handler != SIG_IGN &&
182 sa.sa_handler != SIG_DFL) {
186 sa = (struct sigaction){
187 .sa_flags = SA_RESTART,
188 .sa_handler = tap_trigger_cb,
190 if (sigaction(SIGIO, &sa, NULL) == -1)
193 /* Enable SIGIO on file descriptor */
194 fcntl(fd, F_SETFL, flags | O_ASYNC);
195 fcntl(fd, F_SETOWN, getpid());
198 /* Disable trigger globally in case of error */
200 RTE_LOG(WARNING, PMD, "Rx trigger disabled: %s\n",
207 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0) < 0)
209 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
221 /* Callback to handle the rx burst of packets to the correct interface and
222 * file descriptor(s) in a multi-queue setup.
225 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
228 struct rte_mbuf *mbuf;
229 struct rx_queue *rxq = queue;
231 unsigned long num_rx_bytes = 0;
232 uint32_t trigger = tap_trigger;
234 if (trigger == rxq->trigger_seen)
237 rxq->trigger_seen = trigger;
238 rte_compiler_barrier();
239 for (num_rx = 0; num_rx < nb_pkts; ) {
240 /* allocate the next mbuf */
241 mbuf = rte_pktmbuf_alloc(rxq->mp);
242 if (unlikely(!mbuf)) {
243 RTE_LOG(WARNING, PMD, "TAP unable to allocate mbuf\n");
247 len = read(rxq->fd, rte_pktmbuf_mtod(mbuf, char *),
248 rte_pktmbuf_tailroom(mbuf));
250 rte_pktmbuf_free(mbuf);
254 mbuf->data_len = len;
256 mbuf->port = rxq->in_port;
257 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
260 /* account for the receive frame */
261 bufs[num_rx++] = mbuf;
262 num_rx_bytes += mbuf->pkt_len;
264 rxq->stats.ipackets += num_rx;
265 rxq->stats.ibytes += num_rx_bytes;
270 /* Callback to handle sending packets from the tap interface
273 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
275 struct rte_mbuf *mbuf;
276 struct tx_queue *txq = queue;
278 unsigned long num_tx_bytes = 0;
281 if (unlikely(nb_pkts == 0))
284 for (i = 0; i < nb_pkts; i++) {
285 /* copy the tx frame data */
288 rte_pktmbuf_mtod(mbuf, void *),
289 rte_pktmbuf_pkt_len(mbuf));
294 num_tx_bytes += mbuf->pkt_len;
295 rte_pktmbuf_free(mbuf);
298 txq->stats.opackets += num_tx;
299 txq->stats.errs += nb_pkts - num_tx;
300 txq->stats.obytes += num_tx_bytes;
306 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
307 struct ifreq *ifr, int set)
309 short req_flags = ifr->ifr_flags;
311 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
314 /* fetch current flags to leave other flags untouched */
315 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
318 ifr->ifr_flags |= req_flags;
320 ifr->ifr_flags &= ~req_flags;
327 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
331 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
336 RTE_LOG(ERR, PMD, "%s: ioctl(%lu) failed with error: %s\n",
337 ifr->ifr_name, request, strerror(errno));
342 tap_link_set_down(struct rte_eth_dev *dev)
344 struct pmd_internals *pmd = dev->data->dev_private;
345 struct ifreq ifr = { .ifr_flags = IFF_UP };
347 dev->data->dev_link.link_status = ETH_LINK_DOWN;
348 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
352 tap_link_set_up(struct rte_eth_dev *dev)
354 struct pmd_internals *pmd = dev->data->dev_private;
355 struct ifreq ifr = { .ifr_flags = IFF_UP };
357 dev->data->dev_link.link_status = ETH_LINK_UP;
358 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
362 tap_dev_start(struct rte_eth_dev *dev)
364 return tap_link_set_up(dev);
367 /* This function gets called when the current port gets stopped.
370 tap_dev_stop(struct rte_eth_dev *dev)
372 tap_link_set_down(dev);
376 tap_dev_configure(struct rte_eth_dev *dev __rte_unused)
382 tap_dev_speed_capa(void)
384 uint32_t speed = pmd_link.link_speed;
387 if (speed >= ETH_SPEED_NUM_10M)
388 capa |= ETH_LINK_SPEED_10M;
389 if (speed >= ETH_SPEED_NUM_100M)
390 capa |= ETH_LINK_SPEED_100M;
391 if (speed >= ETH_SPEED_NUM_1G)
392 capa |= ETH_LINK_SPEED_1G;
393 if (speed >= ETH_SPEED_NUM_5G)
394 capa |= ETH_LINK_SPEED_2_5G;
395 if (speed >= ETH_SPEED_NUM_5G)
396 capa |= ETH_LINK_SPEED_5G;
397 if (speed >= ETH_SPEED_NUM_10G)
398 capa |= ETH_LINK_SPEED_10G;
399 if (speed >= ETH_SPEED_NUM_20G)
400 capa |= ETH_LINK_SPEED_20G;
401 if (speed >= ETH_SPEED_NUM_25G)
402 capa |= ETH_LINK_SPEED_25G;
403 if (speed >= ETH_SPEED_NUM_40G)
404 capa |= ETH_LINK_SPEED_40G;
405 if (speed >= ETH_SPEED_NUM_50G)
406 capa |= ETH_LINK_SPEED_50G;
407 if (speed >= ETH_SPEED_NUM_56G)
408 capa |= ETH_LINK_SPEED_56G;
409 if (speed >= ETH_SPEED_NUM_100G)
410 capa |= ETH_LINK_SPEED_100G;
416 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
418 struct pmd_internals *internals = dev->data->dev_private;
420 dev_info->if_index = internals->if_index;
421 dev_info->max_mac_addrs = 1;
422 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
423 dev_info->max_rx_queues = internals->nb_queues;
424 dev_info->max_tx_queues = internals->nb_queues;
425 dev_info->min_rx_bufsize = 0;
426 dev_info->pci_dev = NULL;
427 dev_info->speed_capa = tap_dev_speed_capa();
431 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
433 unsigned int i, imax;
434 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
435 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
436 const struct pmd_internals *pmd = dev->data->dev_private;
438 imax = (pmd->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
439 pmd->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
441 for (i = 0; i < imax; i++) {
442 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
443 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
444 rx_total += tap_stats->q_ipackets[i];
445 rx_bytes_total += tap_stats->q_ibytes[i];
447 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
448 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
449 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
450 tx_total += tap_stats->q_opackets[i];
451 tx_err_total += tap_stats->q_errors[i];
452 tx_bytes_total += tap_stats->q_obytes[i];
455 tap_stats->ipackets = rx_total;
456 tap_stats->ibytes = rx_bytes_total;
457 tap_stats->opackets = tx_total;
458 tap_stats->oerrors = tx_err_total;
459 tap_stats->obytes = tx_bytes_total;
463 tap_stats_reset(struct rte_eth_dev *dev)
466 struct pmd_internals *pmd = dev->data->dev_private;
468 for (i = 0; i < pmd->nb_queues; i++) {
469 pmd->rxq[i].stats.ipackets = 0;
470 pmd->rxq[i].stats.ibytes = 0;
472 pmd->txq[i].stats.opackets = 0;
473 pmd->txq[i].stats.errs = 0;
474 pmd->txq[i].stats.obytes = 0;
479 tap_dev_close(struct rte_eth_dev *dev __rte_unused)
482 struct pmd_internals *internals = dev->data->dev_private;
484 tap_link_set_down(dev);
486 for (i = 0; i < internals->nb_queues; i++) {
487 if (internals->rxq[i].fd != -1)
488 close(internals->rxq[i].fd);
489 internals->rxq[i].fd = -1;
490 internals->txq[i].fd = -1;
495 tap_rx_queue_release(void *queue)
497 struct rx_queue *rxq = queue;
499 if (rxq && (rxq->fd > 0)) {
506 tap_tx_queue_release(void *queue)
508 struct tx_queue *txq = queue;
510 if (txq && (txq->fd > 0)) {
517 tap_link_update(struct rte_eth_dev *dev __rte_unused,
518 int wait_to_complete __rte_unused)
524 tap_promisc_enable(struct rte_eth_dev *dev)
526 struct pmd_internals *pmd = dev->data->dev_private;
527 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
529 dev->data->promiscuous = 1;
530 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
534 tap_promisc_disable(struct rte_eth_dev *dev)
536 struct pmd_internals *pmd = dev->data->dev_private;
537 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
539 dev->data->promiscuous = 0;
540 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
544 tap_allmulti_enable(struct rte_eth_dev *dev)
546 struct pmd_internals *pmd = dev->data->dev_private;
547 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
549 dev->data->all_multicast = 1;
550 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1);
554 tap_allmulti_disable(struct rte_eth_dev *dev)
556 struct pmd_internals *pmd = dev->data->dev_private;
557 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
559 dev->data->all_multicast = 0;
560 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0);
565 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
567 struct pmd_internals *pmd = dev->data->dev_private;
570 if (is_zero_ether_addr(mac_addr)) {
571 RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
576 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
577 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
578 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1) < 0)
580 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
584 tap_setup_queue(struct rte_eth_dev *dev,
585 struct pmd_internals *internals,
588 struct pmd_internals *pmd = dev->data->dev_private;
589 struct rx_queue *rx = &internals->rxq[qid];
590 struct tx_queue *tx = &internals->txq[qid];
597 RTE_LOG(INFO, PMD, "Add queue to TAP %s for qid %d\n",
599 fd = tun_alloc(pmd, qid);
601 RTE_LOG(ERR, PMD, "tun_alloc(%s, %d) failed\n",
608 ifr.ifr_mtu = dev->data->mtu;
609 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1) < 0) {
624 rx_setup_queue(struct rte_eth_dev *dev,
625 struct pmd_internals *internals,
628 dev->data->rx_queues[qid] = &internals->rxq[qid];
630 return tap_setup_queue(dev, internals, qid);
634 tx_setup_queue(struct rte_eth_dev *dev,
635 struct pmd_internals *internals,
638 dev->data->tx_queues[qid] = &internals->txq[qid];
640 return tap_setup_queue(dev, internals, qid);
644 tap_rx_queue_setup(struct rte_eth_dev *dev,
645 uint16_t rx_queue_id,
646 uint16_t nb_rx_desc __rte_unused,
647 unsigned int socket_id __rte_unused,
648 const struct rte_eth_rxconf *rx_conf __rte_unused,
649 struct rte_mempool *mp)
651 struct pmd_internals *internals = dev->data->dev_private;
655 if ((rx_queue_id >= internals->nb_queues) || !mp) {
656 RTE_LOG(WARNING, PMD,
657 "nb_queues %d too small or mempool NULL\n",
658 internals->nb_queues);
662 internals->rxq[rx_queue_id].mp = mp;
663 internals->rxq[rx_queue_id].trigger_seen = 1; /* force initial burst */
664 internals->rxq[rx_queue_id].in_port = dev->data->port_id;
666 /* Now get the space available for data in the mbuf */
667 buf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
668 RTE_PKTMBUF_HEADROOM);
670 if (buf_size < ETH_FRAME_LEN) {
671 RTE_LOG(WARNING, PMD,
672 "%s: %d bytes will not fit in mbuf (%d bytes)\n",
673 dev->data->name, ETH_FRAME_LEN, buf_size);
677 fd = rx_setup_queue(dev, internals, rx_queue_id);
681 RTE_LOG(DEBUG, PMD, " RX TAP device name %s, qid %d on fd %d\n",
682 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
688 tap_tx_queue_setup(struct rte_eth_dev *dev,
689 uint16_t tx_queue_id,
690 uint16_t nb_tx_desc __rte_unused,
691 unsigned int socket_id __rte_unused,
692 const struct rte_eth_txconf *tx_conf __rte_unused)
694 struct pmd_internals *internals = dev->data->dev_private;
697 if (tx_queue_id >= internals->nb_queues)
700 ret = tx_setup_queue(dev, internals, tx_queue_id);
704 RTE_LOG(DEBUG, PMD, " TX TAP device name %s, qid %d on fd %d\n",
705 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd);
711 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
713 struct pmd_internals *pmd = dev->data->dev_private;
714 struct ifreq ifr = { .ifr_mtu = mtu };
717 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1);
719 dev->data->mtu = mtu;
725 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
726 struct ether_addr *mc_addr_set __rte_unused,
727 uint32_t nb_mc_addr __rte_unused)
730 * Nothing to do actually: the tap has no filtering whatsoever, every
731 * packet is received.
736 static const uint32_t*
737 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
739 static const uint32_t ptypes[] = {
740 RTE_PTYPE_INNER_L2_ETHER,
741 RTE_PTYPE_INNER_L2_ETHER_VLAN,
742 RTE_PTYPE_INNER_L2_ETHER_QINQ,
743 RTE_PTYPE_INNER_L3_IPV4,
744 RTE_PTYPE_INNER_L3_IPV4_EXT,
745 RTE_PTYPE_INNER_L3_IPV6,
746 RTE_PTYPE_INNER_L3_IPV6_EXT,
747 RTE_PTYPE_INNER_L4_FRAG,
748 RTE_PTYPE_INNER_L4_UDP,
749 RTE_PTYPE_INNER_L4_TCP,
750 RTE_PTYPE_INNER_L4_SCTP,
752 RTE_PTYPE_L2_ETHER_VLAN,
753 RTE_PTYPE_L2_ETHER_QINQ,
755 RTE_PTYPE_L3_IPV4_EXT,
756 RTE_PTYPE_L3_IPV6_EXT,
768 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
769 struct rte_eth_fc_conf *fc_conf)
771 fc_conf->mode = RTE_FC_NONE;
776 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
777 struct rte_eth_fc_conf *fc_conf)
779 if (fc_conf->mode != RTE_FC_NONE)
784 static const struct eth_dev_ops ops = {
785 .dev_start = tap_dev_start,
786 .dev_stop = tap_dev_stop,
787 .dev_close = tap_dev_close,
788 .dev_configure = tap_dev_configure,
789 .dev_infos_get = tap_dev_info,
790 .rx_queue_setup = tap_rx_queue_setup,
791 .tx_queue_setup = tap_tx_queue_setup,
792 .rx_queue_release = tap_rx_queue_release,
793 .tx_queue_release = tap_tx_queue_release,
794 .flow_ctrl_get = tap_flow_ctrl_get,
795 .flow_ctrl_set = tap_flow_ctrl_set,
796 .link_update = tap_link_update,
797 .dev_set_link_up = tap_link_set_up,
798 .dev_set_link_down = tap_link_set_down,
799 .promiscuous_enable = tap_promisc_enable,
800 .promiscuous_disable = tap_promisc_disable,
801 .allmulticast_enable = tap_allmulti_enable,
802 .allmulticast_disable = tap_allmulti_disable,
803 .mac_addr_set = tap_mac_set,
804 .mtu_set = tap_mtu_set,
805 .set_mc_addr_list = tap_set_mc_addr_list,
806 .stats_get = tap_stats_get,
807 .stats_reset = tap_stats_reset,
808 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
812 eth_dev_tap_create(const char *name, char *tap_name)
814 int numa_node = rte_socket_id();
815 struct rte_eth_dev *dev = NULL;
816 struct pmd_internals *pmd = NULL;
817 struct rte_eth_dev_data *data = NULL;
820 RTE_LOG(DEBUG, PMD, " TAP device on numa %u\n", rte_socket_id());
822 data = rte_zmalloc_socket(tap_name, sizeof(*data), 0, numa_node);
824 RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
828 pmd = rte_zmalloc_socket(tap_name, sizeof(*pmd), 0, numa_node);
830 RTE_LOG(ERR, PMD, "TAP Unable to allocate internal struct\n");
834 /* name in allocation and data->name must be consistent */
835 snprintf(data->name, sizeof(data->name), "%s", name);
836 dev = rte_eth_dev_allocate(name);
838 RTE_LOG(ERR, PMD, "TAP Unable to allocate device struct\n");
842 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
844 pmd->nb_queues = RTE_PMD_TAP_MAX_QUEUES;
846 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
847 if (pmd->ioctl_sock == -1) {
849 "TAP Unable to get a socket for management: %s\n",
854 /* Setup some default values */
855 data->dev_private = pmd;
856 data->port_id = dev->data->port_id;
857 data->mtu = dev->data->mtu;
858 data->dev_flags = RTE_ETH_DEV_DETACHABLE;
859 data->kdrv = RTE_KDRV_NONE;
860 data->drv_name = pmd_tap_drv.driver.name;
861 data->numa_node = numa_node;
863 data->dev_link = pmd_link;
864 data->mac_addrs = &pmd->eth_addr;
865 data->nb_rx_queues = pmd->nb_queues;
866 data->nb_tx_queues = pmd->nb_queues;
871 dev->rx_pkt_burst = pmd_rx_burst;
872 dev->tx_pkt_burst = pmd_tx_burst;
874 /* Presetup the fds to -1 as being not valid */
875 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
883 RTE_LOG(DEBUG, PMD, "TAP Unable to initialize %s\n", name);
888 rte_eth_dev_release_port(dev);
894 set_interface_name(const char *key __rte_unused,
898 char *name = (char *)extra_args;
901 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s", value);
903 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
904 DEFAULT_TAP_NAME, (tap_unit - 1));
910 set_interface_speed(const char *key __rte_unused,
914 *(int *)extra_args = (value) ? atoi(value) : ETH_SPEED_NUM_10G;
919 /* Open a TAP interface device.
922 rte_pmd_tap_probe(const char *name, const char *params)
925 struct rte_kvargs *kvlist = NULL;
927 char tap_name[RTE_ETH_NAME_MAX_LEN];
929 speed = ETH_SPEED_NUM_10G;
930 snprintf(tap_name, sizeof(tap_name), "%s%d",
931 DEFAULT_TAP_NAME, tap_unit++);
933 if (params && (params[0] != '\0')) {
934 RTE_LOG(DEBUG, PMD, "paramaters (%s)\n", params);
936 kvlist = rte_kvargs_parse(params, valid_arguments);
938 if (rte_kvargs_count(kvlist, ETH_TAP_SPEED_ARG) == 1) {
939 ret = rte_kvargs_process(kvlist,
941 &set_interface_speed,
947 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
948 ret = rte_kvargs_process(kvlist,
957 pmd_link.link_speed = speed;
959 RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
962 ret = eth_dev_tap_create(name, tap_name);
966 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
968 tap_unit--; /* Restore the unit number */
970 rte_kvargs_free(kvlist);
975 /* detach a TAP device.
978 rte_pmd_tap_remove(const char *name)
980 struct rte_eth_dev *eth_dev = NULL;
981 struct pmd_internals *internals;
984 RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
987 /* find the ethdev entry */
988 eth_dev = rte_eth_dev_allocated(name);
992 internals = eth_dev->data->dev_private;
993 for (i = 0; i < internals->nb_queues; i++)
994 if (internals->rxq[i].fd != -1)
995 close(internals->rxq[i].fd);
997 close(internals->ioctl_sock);
998 rte_free(eth_dev->data->dev_private);
999 rte_free(eth_dev->data);
1001 rte_eth_dev_release_port(eth_dev);
1006 static struct rte_vdev_driver pmd_tap_drv = {
1007 .probe = rte_pmd_tap_probe,
1008 .remove = rte_pmd_tap_remove,
1010 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1011 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1012 RTE_PMD_REGISTER_PARAM_STRING(net_tap, "iface=<string>,speed=N");