1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016-2017 Intel Corporation
5 #include <rte_atomic.h>
6 #include <rte_branch_prediction.h>
7 #include <rte_byteorder.h>
8 #include <rte_common.h>
10 #include <rte_ethdev.h>
11 #include <rte_ethdev_vdev.h>
12 #include <rte_malloc.h>
13 #include <rte_bus_vdev.h>
14 #include <rte_kvargs.h>
16 #include <rte_debug.h>
19 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/utsname.h>
31 #include <arpa/inet.h>
33 #include <linux/if_tun.h>
34 #include <linux/if_ether.h>
37 #include <rte_eth_tap.h>
39 #include <tap_netlink.h>
40 #include <tap_tcmsgs.h>
42 /* Linux based path to the TUN device */
43 #define TUN_TAP_DEV_PATH "/dev/net/tun"
44 #define DEFAULT_TAP_NAME "dtap"
46 #define ETH_TAP_IFACE_ARG "iface"
47 #define ETH_TAP_SPEED_ARG "speed"
48 #define ETH_TAP_REMOTE_ARG "remote"
49 #define ETH_TAP_MAC_ARG "mac"
50 #define ETH_TAP_MAC_FIXED "fixed"
52 static struct rte_vdev_driver pmd_tap_drv;
54 static const char *valid_arguments[] = {
64 static volatile uint32_t tap_trigger; /* Rx trigger */
66 static struct rte_eth_link pmd_link = {
67 .link_speed = ETH_SPEED_NUM_10G,
68 .link_duplex = ETH_LINK_FULL_DUPLEX,
69 .link_status = ETH_LINK_DOWN,
70 .link_autoneg = ETH_LINK_AUTONEG
74 tap_trigger_cb(int sig __rte_unused)
76 /* Valid trigger values are nonzero */
77 tap_trigger = (tap_trigger + 1) | 0x80000000;
80 /* Specifies on what netdevices the ioctl should be applied */
87 static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
89 /* Tun/Tap allocation routine
91 * name is the number of the interface to use, unless NULL to take the host
95 tun_alloc(struct pmd_internals *pmd)
98 #ifdef IFF_MULTI_QUEUE
99 unsigned int features;
103 memset(&ifr, 0, sizeof(struct ifreq));
106 * Do not set IFF_NO_PI as packet information header will be needed
107 * to check if a received packet has been truncated.
109 ifr.ifr_flags = IFF_TAP;
110 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
112 RTE_LOG(DEBUG, PMD, "ifr_name '%s'\n", ifr.ifr_name);
114 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
116 RTE_LOG(ERR, PMD, "Unable to create TAP interface\n");
120 #ifdef IFF_MULTI_QUEUE
121 /* Grab the TUN features to verify we can work multi-queue */
122 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
123 RTE_LOG(ERR, PMD, "TAP unable to get TUN/TAP features\n");
126 RTE_LOG(DEBUG, PMD, " TAP Features %08x\n", features);
128 if (features & IFF_MULTI_QUEUE) {
129 RTE_LOG(DEBUG, PMD, " Multi-queue support for %d queues\n",
130 RTE_PMD_TAP_MAX_QUEUES);
131 ifr.ifr_flags |= IFF_MULTI_QUEUE;
135 ifr.ifr_flags |= IFF_ONE_QUEUE;
136 RTE_LOG(DEBUG, PMD, " Single queue only support\n");
139 /* Set the TUN/TAP configuration and set the name if needed */
140 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
141 RTE_LOG(WARNING, PMD,
142 "Unable to set TUNSETIFF for %s\n",
148 /* Always set the file descriptor to non-blocking */
149 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
150 RTE_LOG(WARNING, PMD,
151 "Unable to set %s to nonblocking\n",
153 perror("F_SETFL, NONBLOCK");
157 /* Set up trigger to optimize empty Rx bursts */
161 int flags = fcntl(fd, F_GETFL);
163 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
165 if (sa.sa_handler != tap_trigger_cb) {
167 * Make sure SIGIO is not already taken. This is done
168 * as late as possible to leave the application a
169 * chance to set up its own signal handler first.
171 if (sa.sa_handler != SIG_IGN &&
172 sa.sa_handler != SIG_DFL) {
176 sa = (struct sigaction){
177 .sa_flags = SA_RESTART,
178 .sa_handler = tap_trigger_cb,
180 if (sigaction(SIGIO, &sa, NULL) == -1)
183 /* Enable SIGIO on file descriptor */
184 fcntl(fd, F_SETFL, flags | O_ASYNC);
185 fcntl(fd, F_SETOWN, getpid());
188 /* Disable trigger globally in case of error */
190 RTE_LOG(WARNING, PMD, "Rx trigger disabled: %s\n",
203 tap_verify_csum(struct rte_mbuf *mbuf)
205 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
206 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
207 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
208 unsigned int l2_len = sizeof(struct ether_hdr);
214 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
216 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
218 /* Don't verify checksum for packets with discontinuous L2 header */
219 if (unlikely(l2_len + sizeof(struct ipv4_hdr) >
220 rte_pktmbuf_data_len(mbuf)))
222 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
223 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
224 struct ipv4_hdr *iph = l3_hdr;
226 /* ihl contains the number of 4-byte words in the header */
227 l3_len = 4 * (iph->version_ihl & 0xf);
228 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
231 cksum = ~rte_raw_cksum(iph, l3_len);
232 mbuf->ol_flags |= cksum ?
233 PKT_RX_IP_CKSUM_BAD :
234 PKT_RX_IP_CKSUM_GOOD;
235 } else if (l3 == RTE_PTYPE_L3_IPV6) {
236 l3_len = sizeof(struct ipv6_hdr);
238 /* IPv6 extensions are not supported */
241 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
242 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
243 /* Don't verify checksum for multi-segment packets. */
244 if (mbuf->nb_segs > 1)
246 if (l3 == RTE_PTYPE_L3_IPV4)
247 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
248 else if (l3 == RTE_PTYPE_L3_IPV6)
249 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
250 mbuf->ol_flags |= cksum ?
251 PKT_RX_L4_CKSUM_BAD :
252 PKT_RX_L4_CKSUM_GOOD;
256 /* Callback to handle the rx burst of packets to the correct interface and
257 * file descriptor(s) in a multi-queue setup.
260 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
262 struct rx_queue *rxq = queue;
264 unsigned long num_rx_bytes = 0;
265 uint32_t trigger = tap_trigger;
267 if (trigger == rxq->trigger_seen)
270 rxq->trigger_seen = trigger;
271 rte_compiler_barrier();
272 for (num_rx = 0; num_rx < nb_pkts; ) {
273 struct rte_mbuf *mbuf = rxq->pool;
274 struct rte_mbuf *seg = NULL;
275 struct rte_mbuf *new_tail = NULL;
276 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
279 len = readv(rxq->fd, *rxq->iovecs,
280 1 + (rxq->rxmode->enable_scatter ?
281 rxq->nb_rx_desc : 1));
282 if (len < (int)sizeof(struct tun_pi))
285 /* Packet couldn't fit in the provided mbuf */
286 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
287 rxq->stats.ierrors++;
291 len -= sizeof(struct tun_pi);
294 mbuf->port = rxq->in_port;
296 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
298 if (unlikely(!buf)) {
299 rxq->stats.rx_nombuf++;
300 /* No new buf has been allocated: do nothing */
301 if (!new_tail || !seg)
305 rte_pktmbuf_free(mbuf);
309 seg = seg ? seg->next : mbuf;
310 if (rxq->pool == mbuf)
313 new_tail->next = buf;
315 new_tail->next = seg->next;
317 /* iovecs[0] is reserved for packet info (pi) */
318 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
319 buf->buf_len - data_off;
320 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
321 (char *)buf->buf_addr + data_off;
323 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
324 seg->data_off = data_off;
326 len -= seg->data_len;
330 /* First segment has headroom, not the others */
334 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
336 if (rxq->rxmode->hw_ip_checksum)
337 tap_verify_csum(mbuf);
339 /* account for the receive frame */
340 bufs[num_rx++] = mbuf;
341 num_rx_bytes += mbuf->pkt_len;
344 rxq->stats.ipackets += num_rx;
345 rxq->stats.ibytes += num_rx_bytes;
351 tap_tx_offload_get_port_capa(void)
354 * In order to support legacy apps,
355 * report capabilities also as port capabilities.
357 return DEV_TX_OFFLOAD_IPV4_CKSUM |
358 DEV_TX_OFFLOAD_UDP_CKSUM |
359 DEV_TX_OFFLOAD_TCP_CKSUM;
363 tap_tx_offload_get_queue_capa(void)
365 return DEV_TX_OFFLOAD_IPV4_CKSUM |
366 DEV_TX_OFFLOAD_UDP_CKSUM |
367 DEV_TX_OFFLOAD_TCP_CKSUM;
371 tap_txq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
373 uint64_t port_offloads = dev->data->dev_conf.txmode.offloads;
374 uint64_t queue_supp_offloads = tap_tx_offload_get_queue_capa();
375 uint64_t port_supp_offloads = tap_tx_offload_get_port_capa();
377 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
380 /* Verify we have no conflict with port offloads */
381 if ((port_offloads ^ offloads) & port_supp_offloads)
387 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
390 void *l3_hdr = packet + l2_len;
392 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
393 struct ipv4_hdr *iph = l3_hdr;
396 iph->hdr_checksum = 0;
397 cksum = rte_raw_cksum(iph, l3_len);
398 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
400 if (ol_flags & PKT_TX_L4_MASK) {
406 l4_hdr = packet + l2_len + l3_len;
407 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
408 l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
409 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
410 l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
414 if (ol_flags & PKT_TX_IPV4) {
415 struct ipv4_hdr *iph = l3_hdr;
417 l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len;
418 cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
420 struct ipv6_hdr *ip6h = l3_hdr;
422 /* payload_len does not include ext headers */
423 l4_len = rte_be_to_cpu_16(ip6h->payload_len) -
424 l3_len + sizeof(struct ipv6_hdr);
425 cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
427 cksum += rte_raw_cksum(l4_hdr, l4_len);
428 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
429 cksum = (~cksum) & 0xffff;
436 /* Callback to handle sending packets from the tap interface
439 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
441 struct tx_queue *txq = queue;
443 unsigned long num_tx_bytes = 0;
447 if (unlikely(nb_pkts == 0))
450 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
451 for (i = 0; i < nb_pkts; i++) {
452 struct rte_mbuf *mbuf = bufs[num_tx];
453 struct iovec iovecs[mbuf->nb_segs + 1];
454 struct tun_pi pi = { .flags = 0 };
455 struct rte_mbuf *seg = mbuf;
456 char m_copy[mbuf->data_len];
460 /* stats.errs will be incremented */
461 if (rte_pktmbuf_pkt_len(mbuf) > max_size)
464 iovecs[0].iov_base = π
465 iovecs[0].iov_len = sizeof(pi);
466 for (j = 1; j <= mbuf->nb_segs; j++) {
467 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
469 rte_pktmbuf_mtod(seg, void *);
473 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
474 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
475 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
476 /* Support only packets with all data in the same seg */
477 if (mbuf->nb_segs > 1)
479 /* To change checksums, work on a copy of data. */
480 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
481 rte_pktmbuf_data_len(mbuf));
482 tap_tx_offload(m_copy, mbuf->ol_flags,
483 mbuf->l2_len, mbuf->l3_len);
484 iovecs[1].iov_base = m_copy;
486 /* copy the tx frame data */
487 n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
492 num_tx_bytes += mbuf->pkt_len;
493 rte_pktmbuf_free(mbuf);
496 txq->stats.opackets += num_tx;
497 txq->stats.errs += nb_pkts - num_tx;
498 txq->stats.obytes += num_tx_bytes;
504 tap_ioctl_req2str(unsigned long request)
508 return "SIOCSIFFLAGS";
510 return "SIOCGIFFLAGS";
512 return "SIOCGIFHWADDR";
514 return "SIOCSIFHWADDR";
522 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
523 struct ifreq *ifr, int set, enum ioctl_mode mode)
525 short req_flags = ifr->ifr_flags;
526 int remote = pmd->remote_if_index &&
527 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
529 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
532 * If there is a remote netdevice, apply ioctl on it, then apply it on
537 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
538 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
539 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
542 /* fetch current flags to leave other flags untouched */
543 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
546 ifr->ifr_flags |= req_flags;
548 ifr->ifr_flags &= ~req_flags;
556 RTE_ASSERT(!"unsupported request type: must not happen");
558 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
560 if (remote-- && mode == LOCAL_AND_REMOTE)
565 RTE_LOG(DEBUG, PMD, "%s: %s(%s) failed: %s(%d)\n", ifr->ifr_name,
566 __func__, tap_ioctl_req2str(request), strerror(errno), errno);
571 tap_link_set_down(struct rte_eth_dev *dev)
573 struct pmd_internals *pmd = dev->data->dev_private;
574 struct ifreq ifr = { .ifr_flags = IFF_UP };
576 dev->data->dev_link.link_status = ETH_LINK_DOWN;
577 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
581 tap_link_set_up(struct rte_eth_dev *dev)
583 struct pmd_internals *pmd = dev->data->dev_private;
584 struct ifreq ifr = { .ifr_flags = IFF_UP };
586 dev->data->dev_link.link_status = ETH_LINK_UP;
587 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
591 tap_dev_start(struct rte_eth_dev *dev)
595 err = tap_intr_handle_set(dev, 1);
598 return tap_link_set_up(dev);
601 /* This function gets called when the current port gets stopped.
604 tap_dev_stop(struct rte_eth_dev *dev)
606 tap_intr_handle_set(dev, 0);
607 tap_link_set_down(dev);
611 tap_dev_configure(struct rte_eth_dev *dev)
613 uint64_t supp_tx_offloads = tap_tx_offload_get_port_capa();
614 uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
616 if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
619 "Some Tx offloads are not supported "
620 "requested 0x%" PRIx64 " supported 0x%" PRIx64 "\n",
621 tx_offloads, supp_tx_offloads);
624 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
626 "%s: number of rx queues %d exceeds max num of queues %d\n",
628 dev->data->nb_rx_queues,
629 RTE_PMD_TAP_MAX_QUEUES);
632 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
634 "%s: number of tx queues %d exceeds max num of queues %d\n",
636 dev->data->nb_tx_queues,
637 RTE_PMD_TAP_MAX_QUEUES);
641 RTE_LOG(INFO, PMD, "%s: %p: TX configured queues number: %u\n",
642 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
644 RTE_LOG(INFO, PMD, "%s: %p: RX configured queues number: %u\n",
645 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
651 tap_dev_speed_capa(void)
653 uint32_t speed = pmd_link.link_speed;
656 if (speed >= ETH_SPEED_NUM_10M)
657 capa |= ETH_LINK_SPEED_10M;
658 if (speed >= ETH_SPEED_NUM_100M)
659 capa |= ETH_LINK_SPEED_100M;
660 if (speed >= ETH_SPEED_NUM_1G)
661 capa |= ETH_LINK_SPEED_1G;
662 if (speed >= ETH_SPEED_NUM_5G)
663 capa |= ETH_LINK_SPEED_2_5G;
664 if (speed >= ETH_SPEED_NUM_5G)
665 capa |= ETH_LINK_SPEED_5G;
666 if (speed >= ETH_SPEED_NUM_10G)
667 capa |= ETH_LINK_SPEED_10G;
668 if (speed >= ETH_SPEED_NUM_20G)
669 capa |= ETH_LINK_SPEED_20G;
670 if (speed >= ETH_SPEED_NUM_25G)
671 capa |= ETH_LINK_SPEED_25G;
672 if (speed >= ETH_SPEED_NUM_40G)
673 capa |= ETH_LINK_SPEED_40G;
674 if (speed >= ETH_SPEED_NUM_50G)
675 capa |= ETH_LINK_SPEED_50G;
676 if (speed >= ETH_SPEED_NUM_56G)
677 capa |= ETH_LINK_SPEED_56G;
678 if (speed >= ETH_SPEED_NUM_100G)
679 capa |= ETH_LINK_SPEED_100G;
685 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
687 struct pmd_internals *internals = dev->data->dev_private;
689 dev_info->if_index = internals->if_index;
690 dev_info->max_mac_addrs = 1;
691 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
692 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
693 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
694 dev_info->min_rx_bufsize = 0;
695 dev_info->pci_dev = NULL;
696 dev_info->speed_capa = tap_dev_speed_capa();
697 dev_info->rx_offload_capa = (DEV_RX_OFFLOAD_IPV4_CKSUM |
698 DEV_RX_OFFLOAD_UDP_CKSUM |
699 DEV_RX_OFFLOAD_TCP_CKSUM);
700 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
701 dev_info->tx_offload_capa = dev_info->tx_queue_offload_capa |
702 tap_tx_offload_get_port_capa();
706 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
708 unsigned int i, imax;
709 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
710 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
711 unsigned long rx_nombuf = 0, ierrors = 0;
712 const struct pmd_internals *pmd = dev->data->dev_private;
714 /* rx queue statistics */
715 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
716 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
717 for (i = 0; i < imax; i++) {
718 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
719 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
720 rx_total += tap_stats->q_ipackets[i];
721 rx_bytes_total += tap_stats->q_ibytes[i];
722 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
723 ierrors += pmd->rxq[i].stats.ierrors;
726 /* tx queue statistics */
727 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
728 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
730 for (i = 0; i < imax; i++) {
731 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
732 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
733 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
734 tx_total += tap_stats->q_opackets[i];
735 tx_err_total += tap_stats->q_errors[i];
736 tx_bytes_total += tap_stats->q_obytes[i];
739 tap_stats->ipackets = rx_total;
740 tap_stats->ibytes = rx_bytes_total;
741 tap_stats->ierrors = ierrors;
742 tap_stats->rx_nombuf = rx_nombuf;
743 tap_stats->opackets = tx_total;
744 tap_stats->oerrors = tx_err_total;
745 tap_stats->obytes = tx_bytes_total;
750 tap_stats_reset(struct rte_eth_dev *dev)
753 struct pmd_internals *pmd = dev->data->dev_private;
755 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
756 pmd->rxq[i].stats.ipackets = 0;
757 pmd->rxq[i].stats.ibytes = 0;
758 pmd->rxq[i].stats.ierrors = 0;
759 pmd->rxq[i].stats.rx_nombuf = 0;
761 pmd->txq[i].stats.opackets = 0;
762 pmd->txq[i].stats.errs = 0;
763 pmd->txq[i].stats.obytes = 0;
768 tap_dev_close(struct rte_eth_dev *dev)
771 struct pmd_internals *internals = dev->data->dev_private;
773 tap_link_set_down(dev);
774 tap_flow_flush(dev, NULL);
775 tap_flow_implicit_flush(internals, NULL);
777 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
778 if (internals->rxq[i].fd != -1) {
779 close(internals->rxq[i].fd);
780 internals->rxq[i].fd = -1;
782 if (internals->txq[i].fd != -1) {
783 close(internals->txq[i].fd);
784 internals->txq[i].fd = -1;
788 if (internals->remote_if_index) {
789 /* Restore initial remote state */
790 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
791 &internals->remote_initial_flags);
796 tap_rx_queue_release(void *queue)
798 struct rx_queue *rxq = queue;
800 if (rxq && (rxq->fd > 0)) {
803 rte_pktmbuf_free(rxq->pool);
804 rte_free(rxq->iovecs);
811 tap_tx_queue_release(void *queue)
813 struct tx_queue *txq = queue;
815 if (txq && (txq->fd > 0)) {
822 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
824 struct rte_eth_link *dev_link = &dev->data->dev_link;
825 struct pmd_internals *pmd = dev->data->dev_private;
826 struct ifreq ifr = { .ifr_flags = 0 };
828 if (pmd->remote_if_index) {
829 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
830 if (!(ifr.ifr_flags & IFF_UP) ||
831 !(ifr.ifr_flags & IFF_RUNNING)) {
832 dev_link->link_status = ETH_LINK_DOWN;
836 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
837 dev_link->link_status =
838 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
845 tap_promisc_enable(struct rte_eth_dev *dev)
847 struct pmd_internals *pmd = dev->data->dev_private;
848 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
850 dev->data->promiscuous = 1;
851 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
852 if (pmd->remote_if_index && !pmd->flow_isolate)
853 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
857 tap_promisc_disable(struct rte_eth_dev *dev)
859 struct pmd_internals *pmd = dev->data->dev_private;
860 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
862 dev->data->promiscuous = 0;
863 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
864 if (pmd->remote_if_index && !pmd->flow_isolate)
865 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
869 tap_allmulti_enable(struct rte_eth_dev *dev)
871 struct pmd_internals *pmd = dev->data->dev_private;
872 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
874 dev->data->all_multicast = 1;
875 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
876 if (pmd->remote_if_index && !pmd->flow_isolate)
877 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
881 tap_allmulti_disable(struct rte_eth_dev *dev)
883 struct pmd_internals *pmd = dev->data->dev_private;
884 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
886 dev->data->all_multicast = 0;
887 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
888 if (pmd->remote_if_index && !pmd->flow_isolate)
889 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
893 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
895 struct pmd_internals *pmd = dev->data->dev_private;
896 enum ioctl_mode mode = LOCAL_ONLY;
899 if (is_zero_ether_addr(mac_addr)) {
900 RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
904 /* Check the actual current MAC address on the tap netdevice */
905 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
907 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
910 /* Check the current MAC address on the remote */
911 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0)
913 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
915 mode = LOCAL_AND_REMOTE;
916 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
917 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
918 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode) < 0)
920 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
921 if (pmd->remote_if_index && !pmd->flow_isolate) {
922 /* Replace MAC redirection rule after a MAC change */
923 if (tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC) < 0) {
925 "%s: Couldn't delete MAC redirection rule\n",
929 if (tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0)
931 "%s: Couldn't add MAC redirection rule\n",
937 tap_setup_queue(struct rte_eth_dev *dev,
938 struct pmd_internals *internals,
945 struct pmd_internals *pmd = dev->data->dev_private;
946 struct rx_queue *rx = &internals->rxq[qid];
947 struct tx_queue *tx = &internals->txq[qid];
959 /* fd for this queue already exists */
960 RTE_LOG(DEBUG, PMD, "%s: fd %d for %s queue qid %d exists\n",
961 pmd->name, *fd, dir, qid);
962 } else if (*other_fd != -1) {
963 /* Only other_fd exists. dup it */
964 *fd = dup(*other_fd);
967 RTE_LOG(ERR, PMD, "%s: dup() failed.\n",
971 RTE_LOG(DEBUG, PMD, "%s: dup fd %d for %s queue qid %d (%d)\n",
972 pmd->name, *other_fd, dir, qid, *fd);
974 /* Both RX and TX fds do not exist (equal -1). Create fd */
975 *fd = tun_alloc(pmd);
977 *fd = -1; /* restore original value */
978 RTE_LOG(ERR, PMD, "%s: tun_alloc() failed.\n",
982 RTE_LOG(DEBUG, PMD, "%s: add %s queue for qid %d fd %d\n",
983 pmd->name, dir, qid, *fd);
986 tx->mtu = &dev->data->mtu;
987 rx->rxmode = &dev->data->dev_conf.rxmode;
993 tap_rx_queue_setup(struct rte_eth_dev *dev,
994 uint16_t rx_queue_id,
996 unsigned int socket_id,
997 const struct rte_eth_rxconf *rx_conf __rte_unused,
998 struct rte_mempool *mp)
1000 struct pmd_internals *internals = dev->data->dev_private;
1001 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1002 struct rte_mbuf **tmp = &rxq->pool;
1003 long iov_max = sysconf(_SC_IOV_MAX);
1004 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1005 struct iovec (*iovecs)[nb_desc + 1];
1006 int data_off = RTE_PKTMBUF_HEADROOM;
1011 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1012 RTE_LOG(WARNING, PMD,
1013 "nb_rx_queues %d too small or mempool NULL\n",
1014 dev->data->nb_rx_queues);
1019 rxq->trigger_seen = 1; /* force initial burst */
1020 rxq->in_port = dev->data->port_id;
1021 rxq->nb_rx_desc = nb_desc;
1022 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1025 RTE_LOG(WARNING, PMD,
1026 "%s: Couldn't allocate %d RX descriptors\n",
1027 dev->device->name, nb_desc);
1030 rxq->iovecs = iovecs;
1032 dev->data->rx_queues[rx_queue_id] = rxq;
1033 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1039 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1040 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1042 for (i = 1; i <= nb_desc; i++) {
1043 *tmp = rte_pktmbuf_alloc(rxq->mp);
1045 RTE_LOG(WARNING, PMD,
1046 "%s: couldn't allocate memory for queue %d\n",
1047 dev->device->name, rx_queue_id);
1051 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1052 (*rxq->iovecs)[i].iov_base =
1053 (char *)(*tmp)->buf_addr + data_off;
1055 tmp = &(*tmp)->next;
1058 RTE_LOG(DEBUG, PMD, " RX TAP device name %s, qid %d on fd %d\n",
1059 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
1064 rte_pktmbuf_free(rxq->pool);
1066 rte_free(rxq->iovecs);
1072 tap_tx_queue_setup(struct rte_eth_dev *dev,
1073 uint16_t tx_queue_id,
1074 uint16_t nb_tx_desc __rte_unused,
1075 unsigned int socket_id __rte_unused,
1076 const struct rte_eth_txconf *tx_conf)
1078 struct pmd_internals *internals = dev->data->dev_private;
1079 struct tx_queue *txq;
1082 if (tx_queue_id >= dev->data->nb_tx_queues)
1084 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1085 txq = dev->data->tx_queues[tx_queue_id];
1087 * Don't verify port offloads for application which
1090 if (tx_conf != NULL &&
1091 !!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)) {
1092 if (tap_txq_are_offloads_valid(dev, tx_conf->offloads)) {
1093 txq->csum = !!(tx_conf->offloads &
1094 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1095 DEV_TX_OFFLOAD_UDP_CKSUM |
1096 DEV_TX_OFFLOAD_TCP_CKSUM));
1098 rte_errno = ENOTSUP;
1100 "%p: Tx queue offloads 0x%" PRIx64
1101 " don't match port offloads 0x%" PRIx64
1102 " or supported offloads 0x%" PRIx64,
1103 (void *)dev, tx_conf->offloads,
1104 dev->data->dev_conf.txmode.offloads,
1105 tap_tx_offload_get_port_capa());
1109 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1113 " TX TAP device name %s, qid %d on fd %d csum %s\n",
1114 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd,
1115 txq->csum ? "on" : "off");
1121 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1123 struct pmd_internals *pmd = dev->data->dev_private;
1124 struct ifreq ifr = { .ifr_mtu = mtu };
1127 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1129 dev->data->mtu = mtu;
1135 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1136 struct ether_addr *mc_addr_set __rte_unused,
1137 uint32_t nb_mc_addr __rte_unused)
1140 * Nothing to do actually: the tap has no filtering whatsoever, every
1141 * packet is received.
1147 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1149 struct rte_eth_dev *dev = arg;
1150 struct pmd_internals *pmd = dev->data->dev_private;
1151 struct ifinfomsg *info = NLMSG_DATA(nh);
1153 if (nh->nlmsg_type != RTM_NEWLINK ||
1154 (info->ifi_index != pmd->if_index &&
1155 info->ifi_index != pmd->remote_if_index))
1157 return tap_link_update(dev, 0);
1161 tap_dev_intr_handler(void *cb_arg)
1163 struct rte_eth_dev *dev = cb_arg;
1164 struct pmd_internals *pmd = dev->data->dev_private;
1166 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1170 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1172 struct pmd_internals *pmd = dev->data->dev_private;
1174 /* In any case, disable interrupt if the conf is no longer there. */
1175 if (!dev->data->dev_conf.intr_conf.lsc) {
1176 if (pmd->intr_handle.fd != -1) {
1177 tap_nl_final(pmd->intr_handle.fd);
1178 rte_intr_callback_unregister(&pmd->intr_handle,
1179 tap_dev_intr_handler, dev);
1184 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1185 if (unlikely(pmd->intr_handle.fd == -1))
1187 return rte_intr_callback_register(
1188 &pmd->intr_handle, tap_dev_intr_handler, dev);
1190 tap_nl_final(pmd->intr_handle.fd);
1191 return rte_intr_callback_unregister(&pmd->intr_handle,
1192 tap_dev_intr_handler, dev);
1195 static const uint32_t*
1196 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1198 static const uint32_t ptypes[] = {
1199 RTE_PTYPE_INNER_L2_ETHER,
1200 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1201 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1202 RTE_PTYPE_INNER_L3_IPV4,
1203 RTE_PTYPE_INNER_L3_IPV4_EXT,
1204 RTE_PTYPE_INNER_L3_IPV6,
1205 RTE_PTYPE_INNER_L3_IPV6_EXT,
1206 RTE_PTYPE_INNER_L4_FRAG,
1207 RTE_PTYPE_INNER_L4_UDP,
1208 RTE_PTYPE_INNER_L4_TCP,
1209 RTE_PTYPE_INNER_L4_SCTP,
1211 RTE_PTYPE_L2_ETHER_VLAN,
1212 RTE_PTYPE_L2_ETHER_QINQ,
1214 RTE_PTYPE_L3_IPV4_EXT,
1215 RTE_PTYPE_L3_IPV6_EXT,
1227 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1228 struct rte_eth_fc_conf *fc_conf)
1230 fc_conf->mode = RTE_FC_NONE;
1235 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1236 struct rte_eth_fc_conf *fc_conf)
1238 if (fc_conf->mode != RTE_FC_NONE)
1243 static const struct eth_dev_ops ops = {
1244 .dev_start = tap_dev_start,
1245 .dev_stop = tap_dev_stop,
1246 .dev_close = tap_dev_close,
1247 .dev_configure = tap_dev_configure,
1248 .dev_infos_get = tap_dev_info,
1249 .rx_queue_setup = tap_rx_queue_setup,
1250 .tx_queue_setup = tap_tx_queue_setup,
1251 .rx_queue_release = tap_rx_queue_release,
1252 .tx_queue_release = tap_tx_queue_release,
1253 .flow_ctrl_get = tap_flow_ctrl_get,
1254 .flow_ctrl_set = tap_flow_ctrl_set,
1255 .link_update = tap_link_update,
1256 .dev_set_link_up = tap_link_set_up,
1257 .dev_set_link_down = tap_link_set_down,
1258 .promiscuous_enable = tap_promisc_enable,
1259 .promiscuous_disable = tap_promisc_disable,
1260 .allmulticast_enable = tap_allmulti_enable,
1261 .allmulticast_disable = tap_allmulti_disable,
1262 .mac_addr_set = tap_mac_set,
1263 .mtu_set = tap_mtu_set,
1264 .set_mc_addr_list = tap_set_mc_addr_list,
1265 .stats_get = tap_stats_get,
1266 .stats_reset = tap_stats_reset,
1267 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1268 .filter_ctrl = tap_dev_filter_ctrl,
1272 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1273 char *remote_iface, int fixed_mac_type)
1275 int numa_node = rte_socket_id();
1276 struct rte_eth_dev *dev;
1277 struct pmd_internals *pmd;
1278 struct rte_eth_dev_data *data;
1282 RTE_LOG(DEBUG, PMD, " TAP device on numa %u\n", rte_socket_id());
1284 data = rte_zmalloc_socket(tap_name, sizeof(*data), 0, numa_node);
1286 RTE_LOG(ERR, PMD, "TAP Failed to allocate data\n");
1290 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1292 RTE_LOG(ERR, PMD, "TAP Unable to allocate device struct\n");
1296 pmd = dev->data->dev_private;
1298 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1300 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1301 if (pmd->ioctl_sock == -1) {
1303 "TAP Unable to get a socket for management: %s\n",
1308 /* Setup some default values */
1309 rte_memcpy(data, dev->data, sizeof(*data));
1310 data->dev_private = pmd;
1311 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1312 data->numa_node = numa_node;
1314 data->dev_link = pmd_link;
1315 data->mac_addrs = &pmd->eth_addr;
1316 /* Set the number of RX and TX queues */
1317 data->nb_rx_queues = 0;
1318 data->nb_tx_queues = 0;
1321 dev->dev_ops = &ops;
1322 dev->rx_pkt_burst = pmd_rx_burst;
1323 dev->tx_pkt_burst = pmd_tx_burst;
1325 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1326 pmd->intr_handle.fd = -1;
1328 /* Presetup the fds to -1 as being not valid */
1329 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1330 pmd->rxq[i].fd = -1;
1331 pmd->txq[i].fd = -1;
1334 if (fixed_mac_type) {
1335 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1336 static int iface_idx;
1337 char mac[ETHER_ADDR_LEN] = "\0dtap";
1339 mac[ETHER_ADDR_LEN - 1] = iface_idx++;
1340 rte_memcpy(&pmd->eth_addr, mac, ETHER_ADDR_LEN);
1342 eth_random_addr((uint8_t *)&pmd->eth_addr);
1345 /* Immediately create the netdevice (this will create the 1st queue). */
1347 if (tap_setup_queue(dev, pmd, 0, 1) == -1)
1350 if (tap_setup_queue(dev, pmd, 0, 0) == -1)
1353 ifr.ifr_mtu = dev->data->mtu;
1354 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1357 memset(&ifr, 0, sizeof(struct ifreq));
1358 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1359 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr, ETHER_ADDR_LEN);
1360 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1364 * Set up everything related to rte_flow:
1366 * - tap / remote if_index
1367 * - mandatory QDISCs
1368 * - rte_flow actual/implicit lists
1371 pmd->nlsk_fd = tap_nl_init(0);
1372 if (pmd->nlsk_fd == -1) {
1373 RTE_LOG(WARNING, PMD, "%s: failed to create netlink socket.\n",
1375 goto disable_rte_flow;
1377 pmd->if_index = if_nametoindex(pmd->name);
1378 if (!pmd->if_index) {
1379 RTE_LOG(ERR, PMD, "%s: failed to get if_index.\n", pmd->name);
1380 goto disable_rte_flow;
1382 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1383 RTE_LOG(ERR, PMD, "%s: failed to create multiq qdisc.\n",
1385 goto disable_rte_flow;
1387 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1388 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1390 goto disable_rte_flow;
1392 LIST_INIT(&pmd->flows);
1394 if (strlen(remote_iface)) {
1395 pmd->remote_if_index = if_nametoindex(remote_iface);
1396 if (!pmd->remote_if_index) {
1397 RTE_LOG(ERR, PMD, "%s: failed to get %s if_index.\n",
1398 pmd->name, remote_iface);
1401 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1402 "%s", remote_iface);
1404 /* Save state of remote device */
1405 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1407 /* Replicate remote MAC address */
1408 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1409 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1410 pmd->name, pmd->remote_iface);
1413 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1415 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1416 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1417 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1418 pmd->name, remote_iface);
1423 * Flush usually returns negative value because it tries to
1424 * delete every QDISC (and on a running device, one QDISC at
1425 * least is needed). Ignore negative return value.
1427 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1428 if (qdisc_create_ingress(pmd->nlsk_fd,
1429 pmd->remote_if_index) < 0) {
1430 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1434 LIST_INIT(&pmd->implicit_flows);
1435 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1436 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1437 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1438 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1440 "%s: failed to create implicit rules.\n",
1449 RTE_LOG(ERR, PMD, " Disabling rte flow support: %s(%d)\n",
1450 strerror(errno), errno);
1451 if (strlen(remote_iface)) {
1452 RTE_LOG(ERR, PMD, "Remote feature requires flow support.\n");
1458 RTE_LOG(ERR, PMD, " Can't set up remote feature: %s(%d)\n",
1459 strerror(errno), errno);
1460 tap_flow_implicit_flush(pmd, NULL);
1463 RTE_LOG(ERR, PMD, "TAP Unable to initialize %s\n",
1464 rte_vdev_device_name(vdev));
1471 set_interface_name(const char *key __rte_unused,
1475 char *name = (char *)extra_args;
1478 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s", value);
1480 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
1481 DEFAULT_TAP_NAME, (tap_unit - 1));
1487 set_interface_speed(const char *key __rte_unused,
1491 *(int *)extra_args = (value) ? atoi(value) : ETH_SPEED_NUM_10G;
1497 set_remote_iface(const char *key __rte_unused,
1501 char *name = (char *)extra_args;
1504 snprintf(name, RTE_ETH_NAME_MAX_LEN, "%s", value);
1510 set_mac_type(const char *key __rte_unused,
1515 !strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED)))
1516 *(int *)extra_args = 1;
1520 /* Open a TAP interface device.
1523 rte_pmd_tap_probe(struct rte_vdev_device *dev)
1525 const char *name, *params;
1527 struct rte_kvargs *kvlist = NULL;
1529 char tap_name[RTE_ETH_NAME_MAX_LEN];
1530 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1531 int fixed_mac_type = 0;
1533 name = rte_vdev_device_name(dev);
1534 params = rte_vdev_device_args(dev);
1536 speed = ETH_SPEED_NUM_10G;
1537 snprintf(tap_name, sizeof(tap_name), "%s%d",
1538 DEFAULT_TAP_NAME, tap_unit++);
1539 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1541 if (params && (params[0] != '\0')) {
1542 RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params);
1544 kvlist = rte_kvargs_parse(params, valid_arguments);
1546 if (rte_kvargs_count(kvlist, ETH_TAP_SPEED_ARG) == 1) {
1547 ret = rte_kvargs_process(kvlist,
1549 &set_interface_speed,
1555 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1556 ret = rte_kvargs_process(kvlist,
1558 &set_interface_name,
1564 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
1565 ret = rte_kvargs_process(kvlist,
1573 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
1574 ret = rte_kvargs_process(kvlist,
1583 pmd_link.link_speed = speed;
1585 RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
1588 ret = eth_dev_tap_create(dev, tap_name, remote_iface, fixed_mac_type);
1592 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
1594 tap_unit--; /* Restore the unit number */
1596 rte_kvargs_free(kvlist);
1601 /* detach a TAP device.
1604 rte_pmd_tap_remove(struct rte_vdev_device *dev)
1606 struct rte_eth_dev *eth_dev = NULL;
1607 struct pmd_internals *internals;
1610 RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
1613 /* find the ethdev entry */
1614 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1618 internals = eth_dev->data->dev_private;
1619 if (internals->nlsk_fd) {
1620 tap_flow_flush(eth_dev, NULL);
1621 tap_flow_implicit_flush(internals, NULL);
1622 tap_nl_final(internals->nlsk_fd);
1624 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1625 if (internals->rxq[i].fd != -1) {
1626 close(internals->rxq[i].fd);
1627 internals->rxq[i].fd = -1;
1629 if (internals->txq[i].fd != -1) {
1630 close(internals->txq[i].fd);
1631 internals->txq[i].fd = -1;
1635 close(internals->ioctl_sock);
1636 rte_free(eth_dev->data->dev_private);
1637 rte_free(eth_dev->data);
1639 rte_eth_dev_release_port(eth_dev);
1644 static struct rte_vdev_driver pmd_tap_drv = {
1645 .probe = rte_pmd_tap_probe,
1646 .remove = rte_pmd_tap_remove,
1648 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1649 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1650 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
1651 ETH_TAP_IFACE_ARG "=<string> "
1652 ETH_TAP_SPEED_ARG "=<int> "
1653 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_FIXED " "
1654 ETH_TAP_REMOTE_ARG "=<string>");