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_driver.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>
18 #include <rte_string_fns.h>
20 #include <sys/types.h>
22 #include <sys/socket.h>
23 #include <sys/ioctl.h>
24 #include <sys/utsname.h>
32 #include <arpa/inet.h>
34 #include <linux/if_tun.h>
35 #include <linux/if_ether.h>
39 #include <rte_eth_tap.h>
41 #include <tap_netlink.h>
42 #include <tap_tcmsgs.h>
44 /* Linux based path to the TUN device */
45 #define TUN_TAP_DEV_PATH "/dev/net/tun"
46 #define DEFAULT_TAP_NAME "dtap"
47 #define DEFAULT_TUN_NAME "dtun"
49 #define ETH_TAP_IFACE_ARG "iface"
50 #define ETH_TAP_REMOTE_ARG "remote"
51 #define ETH_TAP_MAC_ARG "mac"
52 #define ETH_TAP_MAC_FIXED "fixed"
54 #define ETH_TAP_USR_MAC_FMT "xx:xx:xx:xx:xx:xx"
55 #define ETH_TAP_CMP_MAC_FMT "0123456789ABCDEFabcdef"
56 #define ETH_TAP_MAC_ARG_FMT ETH_TAP_MAC_FIXED "|" ETH_TAP_USR_MAC_FMT
58 static struct rte_vdev_driver pmd_tap_drv;
59 static struct rte_vdev_driver pmd_tun_drv;
61 static const char *valid_arguments[] = {
69 static unsigned int tun_unit;
71 static char tuntap_name[8];
73 static volatile uint32_t tap_trigger; /* Rx trigger */
75 static struct rte_eth_link pmd_link = {
76 .link_speed = ETH_SPEED_NUM_10G,
77 .link_duplex = ETH_LINK_FULL_DUPLEX,
78 .link_status = ETH_LINK_DOWN,
79 .link_autoneg = ETH_LINK_FIXED,
83 tap_trigger_cb(int sig __rte_unused)
85 /* Valid trigger values are nonzero */
86 tap_trigger = (tap_trigger + 1) | 0x80000000;
89 /* Specifies on what netdevices the ioctl should be applied */
96 static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
98 /* Tun/Tap allocation routine
100 * name is the number of the interface to use, unless NULL to take the host
104 tun_alloc(struct pmd_internals *pmd)
107 #ifdef IFF_MULTI_QUEUE
108 unsigned int features;
112 memset(&ifr, 0, sizeof(struct ifreq));
115 * Do not set IFF_NO_PI as packet information header will be needed
116 * to check if a received packet has been truncated.
118 ifr.ifr_flags = (pmd->type == ETH_TUNTAP_TYPE_TAP) ?
119 IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
120 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
122 TAP_LOG(DEBUG, "ifr_name '%s'", ifr.ifr_name);
124 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
126 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
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 TAP_LOG(ERR, "%s unable to get TUN/TAP features",
137 TAP_LOG(DEBUG, "%s Features %08x", tuntap_name, features);
139 if (features & IFF_MULTI_QUEUE) {
140 TAP_LOG(DEBUG, " Multi-queue support for %d queues",
141 RTE_PMD_TAP_MAX_QUEUES);
142 ifr.ifr_flags |= IFF_MULTI_QUEUE;
146 ifr.ifr_flags |= IFF_ONE_QUEUE;
147 TAP_LOG(DEBUG, " Single queue only support");
150 /* Set the TUN/TAP configuration and set the name if needed */
151 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
152 TAP_LOG(WARNING, "Unable to set TUNSETIFF for %s: %s",
153 ifr.ifr_name, strerror(errno));
157 /* Always set the file descriptor to non-blocking */
158 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
160 "Unable to set %s to nonblocking: %s",
161 ifr.ifr_name, strerror(errno));
165 /* Set up trigger to optimize empty Rx bursts */
169 int flags = fcntl(fd, F_GETFL);
171 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
173 if (sa.sa_handler != tap_trigger_cb) {
175 * Make sure SIGIO is not already taken. This is done
176 * as late as possible to leave the application a
177 * chance to set up its own signal handler first.
179 if (sa.sa_handler != SIG_IGN &&
180 sa.sa_handler != SIG_DFL) {
184 sa = (struct sigaction){
185 .sa_flags = SA_RESTART,
186 .sa_handler = tap_trigger_cb,
188 if (sigaction(SIGIO, &sa, NULL) == -1)
191 /* Enable SIGIO on file descriptor */
192 fcntl(fd, F_SETFL, flags | O_ASYNC);
193 fcntl(fd, F_SETOWN, getpid());
197 /* Disable trigger globally in case of error */
199 TAP_LOG(WARNING, "Rx trigger disabled: %s",
212 tap_verify_csum(struct rte_mbuf *mbuf)
214 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
215 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
216 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
217 unsigned int l2_len = sizeof(struct ether_hdr);
223 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
225 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
227 /* Don't verify checksum for packets with discontinuous L2 header */
228 if (unlikely(l2_len + sizeof(struct ipv4_hdr) >
229 rte_pktmbuf_data_len(mbuf)))
231 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
232 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
233 struct ipv4_hdr *iph = l3_hdr;
235 /* ihl contains the number of 4-byte words in the header */
236 l3_len = 4 * (iph->version_ihl & 0xf);
237 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
240 cksum = ~rte_raw_cksum(iph, l3_len);
241 mbuf->ol_flags |= cksum ?
242 PKT_RX_IP_CKSUM_BAD :
243 PKT_RX_IP_CKSUM_GOOD;
244 } else if (l3 == RTE_PTYPE_L3_IPV6) {
245 l3_len = sizeof(struct ipv6_hdr);
247 /* IPv6 extensions are not supported */
250 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
251 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
252 /* Don't verify checksum for multi-segment packets. */
253 if (mbuf->nb_segs > 1)
255 if (l3 == RTE_PTYPE_L3_IPV4)
256 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
257 else if (l3 == RTE_PTYPE_L3_IPV6)
258 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
259 mbuf->ol_flags |= cksum ?
260 PKT_RX_L4_CKSUM_BAD :
261 PKT_RX_L4_CKSUM_GOOD;
266 tap_rx_offload_get_port_capa(void)
269 * No specific port Rx offload capabilities.
275 tap_rx_offload_get_queue_capa(void)
277 return DEV_RX_OFFLOAD_SCATTER |
278 DEV_RX_OFFLOAD_IPV4_CKSUM |
279 DEV_RX_OFFLOAD_UDP_CKSUM |
280 DEV_RX_OFFLOAD_TCP_CKSUM |
281 DEV_RX_OFFLOAD_CRC_STRIP;
284 /* Callback to handle the rx burst of packets to the correct interface and
285 * file descriptor(s) in a multi-queue setup.
288 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
290 struct rx_queue *rxq = queue;
292 unsigned long num_rx_bytes = 0;
293 uint32_t trigger = tap_trigger;
295 if (trigger == rxq->trigger_seen)
298 rxq->trigger_seen = trigger;
299 rte_compiler_barrier();
300 for (num_rx = 0; num_rx < nb_pkts; ) {
301 struct rte_mbuf *mbuf = rxq->pool;
302 struct rte_mbuf *seg = NULL;
303 struct rte_mbuf *new_tail = NULL;
304 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
307 len = readv(rxq->fd, *rxq->iovecs,
309 (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
310 rxq->nb_rx_desc : 1));
311 if (len < (int)sizeof(struct tun_pi))
314 /* Packet couldn't fit in the provided mbuf */
315 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
316 rxq->stats.ierrors++;
320 len -= sizeof(struct tun_pi);
323 mbuf->port = rxq->in_port;
325 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
327 if (unlikely(!buf)) {
328 rxq->stats.rx_nombuf++;
329 /* No new buf has been allocated: do nothing */
330 if (!new_tail || !seg)
334 rte_pktmbuf_free(mbuf);
338 seg = seg ? seg->next : mbuf;
339 if (rxq->pool == mbuf)
342 new_tail->next = buf;
344 new_tail->next = seg->next;
346 /* iovecs[0] is reserved for packet info (pi) */
347 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
348 buf->buf_len - data_off;
349 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
350 (char *)buf->buf_addr + data_off;
352 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
353 seg->data_off = data_off;
355 len -= seg->data_len;
359 /* First segment has headroom, not the others */
363 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
365 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
366 tap_verify_csum(mbuf);
368 /* account for the receive frame */
369 bufs[num_rx++] = mbuf;
370 num_rx_bytes += mbuf->pkt_len;
373 rxq->stats.ipackets += num_rx;
374 rxq->stats.ibytes += num_rx_bytes;
380 tap_tx_offload_get_port_capa(void)
383 * No specific port Tx offload capabilities.
389 tap_tx_offload_get_queue_capa(void)
391 return DEV_TX_OFFLOAD_MULTI_SEGS |
392 DEV_TX_OFFLOAD_IPV4_CKSUM |
393 DEV_TX_OFFLOAD_UDP_CKSUM |
394 DEV_TX_OFFLOAD_TCP_CKSUM;
398 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
401 void *l3_hdr = packet + l2_len;
403 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
404 struct ipv4_hdr *iph = l3_hdr;
407 iph->hdr_checksum = 0;
408 cksum = rte_raw_cksum(iph, l3_len);
409 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
411 if (ol_flags & PKT_TX_L4_MASK) {
417 l4_hdr = packet + l2_len + l3_len;
418 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
419 l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
420 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
421 l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
425 if (ol_flags & PKT_TX_IPV4) {
426 struct ipv4_hdr *iph = l3_hdr;
428 l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len;
429 cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
431 struct ipv6_hdr *ip6h = l3_hdr;
433 /* payload_len does not include ext headers */
434 l4_len = rte_be_to_cpu_16(ip6h->payload_len) -
435 l3_len + sizeof(struct ipv6_hdr);
436 cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
438 cksum += rte_raw_cksum(l4_hdr, l4_len);
439 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
440 cksum = (~cksum) & 0xffff;
447 /* Callback to handle sending packets from the tap interface
450 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
452 struct tx_queue *txq = queue;
454 unsigned long num_tx_bytes = 0;
458 if (unlikely(nb_pkts == 0))
461 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
462 for (i = 0; i < nb_pkts; i++) {
463 struct rte_mbuf *mbuf = bufs[num_tx];
464 struct iovec iovecs[mbuf->nb_segs + 1];
465 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
466 struct rte_mbuf *seg = mbuf;
467 char m_copy[mbuf->data_len];
471 /* stats.errs will be incremented */
472 if (rte_pktmbuf_pkt_len(mbuf) > max_size)
475 if (txq->type == ETH_TUNTAP_TYPE_TUN) {
477 * TUN and TAP are created with IFF_NO_PI disabled.
478 * For TUN PMD this mandatory as fields are used by
479 * Kernel tun.c to determine whether its IP or non IP
482 * The logic fetches the first byte of data from mbuf
483 * then compares whether its v4 or v6. If first byte
484 * is 4 or 6, then protocol field is updated.
486 char *buff_data = rte_pktmbuf_mtod(seg, void *);
487 j = (*buff_data & 0xf0);
488 pi.proto = (j == 0x40) ? rte_cpu_to_be_16(ETHER_TYPE_IPv4) :
489 (j == 0x60) ? rte_cpu_to_be_16(ETHER_TYPE_IPv6) : 0x00;
492 iovecs[0].iov_base = π
493 iovecs[0].iov_len = sizeof(pi);
494 for (j = 1; j <= mbuf->nb_segs; j++) {
495 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
497 rte_pktmbuf_mtod(seg, void *);
501 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
502 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
503 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
504 /* Support only packets with all data in the same seg */
505 if (mbuf->nb_segs > 1)
507 /* To change checksums, work on a copy of data. */
508 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
509 rte_pktmbuf_data_len(mbuf));
510 tap_tx_offload(m_copy, mbuf->ol_flags,
511 mbuf->l2_len, mbuf->l3_len);
512 iovecs[1].iov_base = m_copy;
514 /* copy the tx frame data */
515 n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
520 num_tx_bytes += mbuf->pkt_len;
521 rte_pktmbuf_free(mbuf);
524 txq->stats.opackets += num_tx;
525 txq->stats.errs += nb_pkts - num_tx;
526 txq->stats.obytes += num_tx_bytes;
532 tap_ioctl_req2str(unsigned long request)
536 return "SIOCSIFFLAGS";
538 return "SIOCGIFFLAGS";
540 return "SIOCGIFHWADDR";
542 return "SIOCSIFHWADDR";
550 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
551 struct ifreq *ifr, int set, enum ioctl_mode mode)
553 short req_flags = ifr->ifr_flags;
554 int remote = pmd->remote_if_index &&
555 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
557 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
560 * If there is a remote netdevice, apply ioctl on it, then apply it on
565 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
566 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
567 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
570 /* fetch current flags to leave other flags untouched */
571 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
574 ifr->ifr_flags |= req_flags;
576 ifr->ifr_flags &= ~req_flags;
584 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
588 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
590 if (remote-- && mode == LOCAL_AND_REMOTE)
595 TAP_LOG(DEBUG, "%s(%s) failed: %s(%d)", ifr->ifr_name,
596 tap_ioctl_req2str(request), strerror(errno), errno);
601 tap_link_set_down(struct rte_eth_dev *dev)
603 struct pmd_internals *pmd = dev->data->dev_private;
604 struct ifreq ifr = { .ifr_flags = IFF_UP };
606 dev->data->dev_link.link_status = ETH_LINK_DOWN;
607 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
611 tap_link_set_up(struct rte_eth_dev *dev)
613 struct pmd_internals *pmd = dev->data->dev_private;
614 struct ifreq ifr = { .ifr_flags = IFF_UP };
616 dev->data->dev_link.link_status = ETH_LINK_UP;
617 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
621 tap_dev_start(struct rte_eth_dev *dev)
625 err = tap_intr_handle_set(dev, 1);
628 return tap_link_set_up(dev);
631 /* This function gets called when the current port gets stopped.
634 tap_dev_stop(struct rte_eth_dev *dev)
636 tap_intr_handle_set(dev, 0);
637 tap_link_set_down(dev);
641 tap_dev_configure(struct rte_eth_dev *dev)
643 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
645 "%s: number of rx queues %d exceeds max num of queues %d",
647 dev->data->nb_rx_queues,
648 RTE_PMD_TAP_MAX_QUEUES);
651 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
653 "%s: number of tx queues %d exceeds max num of queues %d",
655 dev->data->nb_tx_queues,
656 RTE_PMD_TAP_MAX_QUEUES);
660 TAP_LOG(INFO, "%s: %p: TX configured queues number: %u",
661 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
663 TAP_LOG(INFO, "%s: %p: RX configured queues number: %u",
664 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
670 tap_dev_speed_capa(void)
672 uint32_t speed = pmd_link.link_speed;
675 if (speed >= ETH_SPEED_NUM_10M)
676 capa |= ETH_LINK_SPEED_10M;
677 if (speed >= ETH_SPEED_NUM_100M)
678 capa |= ETH_LINK_SPEED_100M;
679 if (speed >= ETH_SPEED_NUM_1G)
680 capa |= ETH_LINK_SPEED_1G;
681 if (speed >= ETH_SPEED_NUM_5G)
682 capa |= ETH_LINK_SPEED_2_5G;
683 if (speed >= ETH_SPEED_NUM_5G)
684 capa |= ETH_LINK_SPEED_5G;
685 if (speed >= ETH_SPEED_NUM_10G)
686 capa |= ETH_LINK_SPEED_10G;
687 if (speed >= ETH_SPEED_NUM_20G)
688 capa |= ETH_LINK_SPEED_20G;
689 if (speed >= ETH_SPEED_NUM_25G)
690 capa |= ETH_LINK_SPEED_25G;
691 if (speed >= ETH_SPEED_NUM_40G)
692 capa |= ETH_LINK_SPEED_40G;
693 if (speed >= ETH_SPEED_NUM_50G)
694 capa |= ETH_LINK_SPEED_50G;
695 if (speed >= ETH_SPEED_NUM_56G)
696 capa |= ETH_LINK_SPEED_56G;
697 if (speed >= ETH_SPEED_NUM_100G)
698 capa |= ETH_LINK_SPEED_100G;
704 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
706 struct pmd_internals *internals = dev->data->dev_private;
708 dev_info->if_index = internals->if_index;
709 dev_info->max_mac_addrs = 1;
710 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
711 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
712 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
713 dev_info->min_rx_bufsize = 0;
714 dev_info->speed_capa = tap_dev_speed_capa();
715 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
716 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
717 dev_info->rx_queue_offload_capa;
718 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
719 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
720 dev_info->tx_queue_offload_capa;
721 dev_info->hash_key_size = TAP_RSS_HASH_KEY_SIZE;
723 * limitation: TAP supports all of IP, UDP and TCP hash
724 * functions together and not in partial combinations
726 dev_info->flow_type_rss_offloads = ~TAP_RSS_HF_MASK;
730 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
732 unsigned int i, imax;
733 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
734 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
735 unsigned long rx_nombuf = 0, ierrors = 0;
736 const struct pmd_internals *pmd = dev->data->dev_private;
738 /* rx queue statistics */
739 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
740 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
741 for (i = 0; i < imax; i++) {
742 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
743 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
744 rx_total += tap_stats->q_ipackets[i];
745 rx_bytes_total += tap_stats->q_ibytes[i];
746 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
747 ierrors += pmd->rxq[i].stats.ierrors;
750 /* tx queue statistics */
751 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
752 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
754 for (i = 0; i < imax; i++) {
755 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
756 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
757 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
758 tx_total += tap_stats->q_opackets[i];
759 tx_err_total += tap_stats->q_errors[i];
760 tx_bytes_total += tap_stats->q_obytes[i];
763 tap_stats->ipackets = rx_total;
764 tap_stats->ibytes = rx_bytes_total;
765 tap_stats->ierrors = ierrors;
766 tap_stats->rx_nombuf = rx_nombuf;
767 tap_stats->opackets = tx_total;
768 tap_stats->oerrors = tx_err_total;
769 tap_stats->obytes = tx_bytes_total;
774 tap_stats_reset(struct rte_eth_dev *dev)
777 struct pmd_internals *pmd = dev->data->dev_private;
779 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
780 pmd->rxq[i].stats.ipackets = 0;
781 pmd->rxq[i].stats.ibytes = 0;
782 pmd->rxq[i].stats.ierrors = 0;
783 pmd->rxq[i].stats.rx_nombuf = 0;
785 pmd->txq[i].stats.opackets = 0;
786 pmd->txq[i].stats.errs = 0;
787 pmd->txq[i].stats.obytes = 0;
792 tap_dev_close(struct rte_eth_dev *dev)
795 struct pmd_internals *internals = dev->data->dev_private;
797 tap_link_set_down(dev);
798 tap_flow_flush(dev, NULL);
799 tap_flow_implicit_flush(internals, NULL);
801 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
802 if (internals->rxq[i].fd != -1) {
803 close(internals->rxq[i].fd);
804 internals->rxq[i].fd = -1;
806 if (internals->txq[i].fd != -1) {
807 close(internals->txq[i].fd);
808 internals->txq[i].fd = -1;
812 if (internals->remote_if_index) {
813 /* Restore initial remote state */
814 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
815 &internals->remote_initial_flags);
818 if (internals->ka_fd != -1) {
819 close(internals->ka_fd);
820 internals->ka_fd = -1;
823 * Since TUN device has no more opened file descriptors
824 * it will be removed from kernel
829 tap_rx_queue_release(void *queue)
831 struct rx_queue *rxq = queue;
833 if (rxq && (rxq->fd > 0)) {
836 rte_pktmbuf_free(rxq->pool);
837 rte_free(rxq->iovecs);
844 tap_tx_queue_release(void *queue)
846 struct tx_queue *txq = queue;
848 if (txq && (txq->fd > 0)) {
855 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
857 struct rte_eth_link *dev_link = &dev->data->dev_link;
858 struct pmd_internals *pmd = dev->data->dev_private;
859 struct ifreq ifr = { .ifr_flags = 0 };
861 if (pmd->remote_if_index) {
862 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
863 if (!(ifr.ifr_flags & IFF_UP) ||
864 !(ifr.ifr_flags & IFF_RUNNING)) {
865 dev_link->link_status = ETH_LINK_DOWN;
869 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
870 dev_link->link_status =
871 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
878 tap_promisc_enable(struct rte_eth_dev *dev)
880 struct pmd_internals *pmd = dev->data->dev_private;
881 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
883 dev->data->promiscuous = 1;
884 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
885 if (pmd->remote_if_index && !pmd->flow_isolate)
886 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
890 tap_promisc_disable(struct rte_eth_dev *dev)
892 struct pmd_internals *pmd = dev->data->dev_private;
893 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
895 dev->data->promiscuous = 0;
896 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
897 if (pmd->remote_if_index && !pmd->flow_isolate)
898 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
902 tap_allmulti_enable(struct rte_eth_dev *dev)
904 struct pmd_internals *pmd = dev->data->dev_private;
905 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
907 dev->data->all_multicast = 1;
908 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
909 if (pmd->remote_if_index && !pmd->flow_isolate)
910 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
914 tap_allmulti_disable(struct rte_eth_dev *dev)
916 struct pmd_internals *pmd = dev->data->dev_private;
917 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
919 dev->data->all_multicast = 0;
920 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
921 if (pmd->remote_if_index && !pmd->flow_isolate)
922 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
926 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
928 struct pmd_internals *pmd = dev->data->dev_private;
929 enum ioctl_mode mode = LOCAL_ONLY;
933 if (pmd->type == ETH_TUNTAP_TYPE_TUN) {
934 TAP_LOG(ERR, "%s: can't MAC address for TUN",
939 if (is_zero_ether_addr(mac_addr)) {
940 TAP_LOG(ERR, "%s: can't set an empty MAC address",
944 /* Check the actual current MAC address on the tap netdevice */
945 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
948 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
951 /* Check the current MAC address on the remote */
952 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
955 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
957 mode = LOCAL_AND_REMOTE;
958 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
959 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
960 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
963 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
964 if (pmd->remote_if_index && !pmd->flow_isolate) {
965 /* Replace MAC redirection rule after a MAC change */
966 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
969 "%s: Couldn't delete MAC redirection rule",
973 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
976 "%s: Couldn't add MAC redirection rule",
986 tap_setup_queue(struct rte_eth_dev *dev,
987 struct pmd_internals *internals,
994 struct pmd_internals *pmd = dev->data->dev_private;
995 struct rx_queue *rx = &internals->rxq[qid];
996 struct tx_queue *tx = &internals->txq[qid];
1008 /* fd for this queue already exists */
1009 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1010 pmd->name, *fd, dir, qid);
1011 } else if (*other_fd != -1) {
1012 /* Only other_fd exists. dup it */
1013 *fd = dup(*other_fd);
1016 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1019 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1020 pmd->name, *other_fd, dir, qid, *fd);
1022 /* Both RX and TX fds do not exist (equal -1). Create fd */
1023 *fd = tun_alloc(pmd);
1025 *fd = -1; /* restore original value */
1026 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1029 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1030 pmd->name, dir, qid, *fd);
1033 tx->mtu = &dev->data->mtu;
1034 rx->rxmode = &dev->data->dev_conf.rxmode;
1036 tx->type = pmd->type;
1042 tap_rx_queue_setup(struct rte_eth_dev *dev,
1043 uint16_t rx_queue_id,
1044 uint16_t nb_rx_desc,
1045 unsigned int socket_id,
1046 const struct rte_eth_rxconf *rx_conf __rte_unused,
1047 struct rte_mempool *mp)
1049 struct pmd_internals *internals = dev->data->dev_private;
1050 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1051 struct rte_mbuf **tmp = &rxq->pool;
1052 long iov_max = sysconf(_SC_IOV_MAX);
1053 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1054 struct iovec (*iovecs)[nb_desc + 1];
1055 int data_off = RTE_PKTMBUF_HEADROOM;
1060 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1062 "nb_rx_queues %d too small or mempool NULL",
1063 dev->data->nb_rx_queues);
1068 rxq->trigger_seen = 1; /* force initial burst */
1069 rxq->in_port = dev->data->port_id;
1070 rxq->nb_rx_desc = nb_desc;
1071 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1075 "%s: Couldn't allocate %d RX descriptors",
1076 dev->device->name, nb_desc);
1079 rxq->iovecs = iovecs;
1081 dev->data->rx_queues[rx_queue_id] = rxq;
1082 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1088 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1089 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1091 for (i = 1; i <= nb_desc; i++) {
1092 *tmp = rte_pktmbuf_alloc(rxq->mp);
1095 "%s: couldn't allocate memory for queue %d",
1096 dev->device->name, rx_queue_id);
1100 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1101 (*rxq->iovecs)[i].iov_base =
1102 (char *)(*tmp)->buf_addr + data_off;
1104 tmp = &(*tmp)->next;
1107 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1108 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
1113 rte_pktmbuf_free(rxq->pool);
1115 rte_free(rxq->iovecs);
1121 tap_tx_queue_setup(struct rte_eth_dev *dev,
1122 uint16_t tx_queue_id,
1123 uint16_t nb_tx_desc __rte_unused,
1124 unsigned int socket_id __rte_unused,
1125 const struct rte_eth_txconf *tx_conf)
1127 struct pmd_internals *internals = dev->data->dev_private;
1128 struct tx_queue *txq;
1132 if (tx_queue_id >= dev->data->nb_tx_queues)
1134 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1135 txq = dev->data->tx_queues[tx_queue_id];
1137 offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1138 txq->csum = !!(offloads &
1139 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1140 DEV_TX_OFFLOAD_UDP_CKSUM |
1141 DEV_TX_OFFLOAD_TCP_CKSUM));
1143 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1147 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1148 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd,
1149 txq->csum ? "on" : "off");
1155 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1157 struct pmd_internals *pmd = dev->data->dev_private;
1158 struct ifreq ifr = { .ifr_mtu = mtu };
1161 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1163 dev->data->mtu = mtu;
1169 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1170 struct ether_addr *mc_addr_set __rte_unused,
1171 uint32_t nb_mc_addr __rte_unused)
1174 * Nothing to do actually: the tap has no filtering whatsoever, every
1175 * packet is received.
1181 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1183 struct rte_eth_dev *dev = arg;
1184 struct pmd_internals *pmd = dev->data->dev_private;
1185 struct ifinfomsg *info = NLMSG_DATA(nh);
1187 if (nh->nlmsg_type != RTM_NEWLINK ||
1188 (info->ifi_index != pmd->if_index &&
1189 info->ifi_index != pmd->remote_if_index))
1191 return tap_link_update(dev, 0);
1195 tap_dev_intr_handler(void *cb_arg)
1197 struct rte_eth_dev *dev = cb_arg;
1198 struct pmd_internals *pmd = dev->data->dev_private;
1200 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1204 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1206 struct pmd_internals *pmd = dev->data->dev_private;
1208 /* In any case, disable interrupt if the conf is no longer there. */
1209 if (!dev->data->dev_conf.intr_conf.lsc) {
1210 if (pmd->intr_handle.fd != -1) {
1211 tap_nl_final(pmd->intr_handle.fd);
1212 rte_intr_callback_unregister(&pmd->intr_handle,
1213 tap_dev_intr_handler, dev);
1218 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1219 if (unlikely(pmd->intr_handle.fd == -1))
1221 return rte_intr_callback_register(
1222 &pmd->intr_handle, tap_dev_intr_handler, dev);
1224 tap_nl_final(pmd->intr_handle.fd);
1225 return rte_intr_callback_unregister(&pmd->intr_handle,
1226 tap_dev_intr_handler, dev);
1230 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1234 err = tap_lsc_intr_handle_set(dev, set);
1237 err = tap_rx_intr_vec_set(dev, set);
1239 tap_lsc_intr_handle_set(dev, 0);
1243 static const uint32_t*
1244 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1246 static const uint32_t ptypes[] = {
1247 RTE_PTYPE_INNER_L2_ETHER,
1248 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1249 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1250 RTE_PTYPE_INNER_L3_IPV4,
1251 RTE_PTYPE_INNER_L3_IPV4_EXT,
1252 RTE_PTYPE_INNER_L3_IPV6,
1253 RTE_PTYPE_INNER_L3_IPV6_EXT,
1254 RTE_PTYPE_INNER_L4_FRAG,
1255 RTE_PTYPE_INNER_L4_UDP,
1256 RTE_PTYPE_INNER_L4_TCP,
1257 RTE_PTYPE_INNER_L4_SCTP,
1259 RTE_PTYPE_L2_ETHER_VLAN,
1260 RTE_PTYPE_L2_ETHER_QINQ,
1262 RTE_PTYPE_L3_IPV4_EXT,
1263 RTE_PTYPE_L3_IPV6_EXT,
1275 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1276 struct rte_eth_fc_conf *fc_conf)
1278 fc_conf->mode = RTE_FC_NONE;
1283 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1284 struct rte_eth_fc_conf *fc_conf)
1286 if (fc_conf->mode != RTE_FC_NONE)
1292 * DPDK callback to update the RSS hash configuration.
1295 * Pointer to Ethernet device structure.
1296 * @param[in] rss_conf
1297 * RSS configuration data.
1300 * 0 on success, a negative errno value otherwise and rte_errno is set.
1303 tap_rss_hash_update(struct rte_eth_dev *dev,
1304 struct rte_eth_rss_conf *rss_conf)
1306 if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
1310 if (rss_conf->rss_key && rss_conf->rss_key_len) {
1312 * Currently TAP RSS key is hard coded
1313 * and cannot be updated
1316 "port %u RSS key cannot be updated",
1317 dev->data->port_id);
1324 static const struct eth_dev_ops ops = {
1325 .dev_start = tap_dev_start,
1326 .dev_stop = tap_dev_stop,
1327 .dev_close = tap_dev_close,
1328 .dev_configure = tap_dev_configure,
1329 .dev_infos_get = tap_dev_info,
1330 .rx_queue_setup = tap_rx_queue_setup,
1331 .tx_queue_setup = tap_tx_queue_setup,
1332 .rx_queue_release = tap_rx_queue_release,
1333 .tx_queue_release = tap_tx_queue_release,
1334 .flow_ctrl_get = tap_flow_ctrl_get,
1335 .flow_ctrl_set = tap_flow_ctrl_set,
1336 .link_update = tap_link_update,
1337 .dev_set_link_up = tap_link_set_up,
1338 .dev_set_link_down = tap_link_set_down,
1339 .promiscuous_enable = tap_promisc_enable,
1340 .promiscuous_disable = tap_promisc_disable,
1341 .allmulticast_enable = tap_allmulti_enable,
1342 .allmulticast_disable = tap_allmulti_disable,
1343 .mac_addr_set = tap_mac_set,
1344 .mtu_set = tap_mtu_set,
1345 .set_mc_addr_list = tap_set_mc_addr_list,
1346 .stats_get = tap_stats_get,
1347 .stats_reset = tap_stats_reset,
1348 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1349 .rss_hash_update = tap_rss_hash_update,
1350 .filter_ctrl = tap_dev_filter_ctrl,
1354 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1355 char *remote_iface, struct ether_addr *mac_addr,
1356 enum rte_tuntap_type type)
1358 int numa_node = rte_socket_id();
1359 struct rte_eth_dev *dev;
1360 struct pmd_internals *pmd;
1361 struct rte_eth_dev_data *data;
1365 TAP_LOG(DEBUG, "%s device on numa %u",
1366 tuntap_name, rte_socket_id());
1368 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1370 TAP_LOG(ERR, "%s Unable to allocate device struct",
1372 goto error_exit_nodev;
1375 pmd = dev->data->dev_private;
1377 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1380 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1381 if (pmd->ioctl_sock == -1) {
1383 "%s Unable to get a socket for management: %s",
1384 tuntap_name, strerror(errno));
1388 /* Setup some default values */
1390 data->dev_private = pmd;
1391 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1392 data->numa_node = numa_node;
1394 data->dev_link = pmd_link;
1395 data->mac_addrs = &pmd->eth_addr;
1396 /* Set the number of RX and TX queues */
1397 data->nb_rx_queues = 0;
1398 data->nb_tx_queues = 0;
1400 dev->dev_ops = &ops;
1401 dev->rx_pkt_burst = pmd_rx_burst;
1402 dev->tx_pkt_burst = pmd_tx_burst;
1404 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1405 pmd->intr_handle.fd = -1;
1406 dev->intr_handle = &pmd->intr_handle;
1408 /* Presetup the fds to -1 as being not valid */
1410 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1411 pmd->rxq[i].fd = -1;
1412 pmd->txq[i].fd = -1;
1415 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1416 if (is_zero_ether_addr(mac_addr))
1417 eth_random_addr((uint8_t *)&pmd->eth_addr);
1419 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1423 * Allocate a TUN device keep-alive file descriptor that will only be
1424 * closed when the TUN device itself is closed or removed.
1425 * This keep-alive file descriptor will guarantee that the TUN device
1426 * exists even when all of its queues are closed
1428 pmd->ka_fd = tun_alloc(pmd);
1429 if (pmd->ka_fd == -1) {
1430 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
1434 ifr.ifr_mtu = dev->data->mtu;
1435 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1438 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1439 memset(&ifr, 0, sizeof(struct ifreq));
1440 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1441 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1443 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1448 * Set up everything related to rte_flow:
1450 * - tap / remote if_index
1451 * - mandatory QDISCs
1452 * - rte_flow actual/implicit lists
1455 pmd->nlsk_fd = tap_nl_init(0);
1456 if (pmd->nlsk_fd == -1) {
1457 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
1459 goto disable_rte_flow;
1461 pmd->if_index = if_nametoindex(pmd->name);
1462 if (!pmd->if_index) {
1463 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
1464 goto disable_rte_flow;
1466 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1467 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
1469 goto disable_rte_flow;
1471 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1472 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1474 goto disable_rte_flow;
1476 LIST_INIT(&pmd->flows);
1478 if (strlen(remote_iface)) {
1479 pmd->remote_if_index = if_nametoindex(remote_iface);
1480 if (!pmd->remote_if_index) {
1481 TAP_LOG(ERR, "%s: failed to get %s if_index.",
1482 pmd->name, remote_iface);
1485 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1486 "%s", remote_iface);
1488 /* Save state of remote device */
1489 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1491 /* Replicate remote MAC address */
1492 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1493 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1494 pmd->name, pmd->remote_iface);
1497 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1499 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1500 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1501 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1502 pmd->name, remote_iface);
1507 * Flush usually returns negative value because it tries to
1508 * delete every QDISC (and on a running device, one QDISC at
1509 * least is needed). Ignore negative return value.
1511 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1512 if (qdisc_create_ingress(pmd->nlsk_fd,
1513 pmd->remote_if_index) < 0) {
1514 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1518 LIST_INIT(&pmd->implicit_flows);
1519 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1520 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1521 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1522 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1524 "%s: failed to create implicit rules.",
1530 rte_eth_dev_probing_finish(dev);
1534 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
1535 strerror(errno), errno);
1536 if (strlen(remote_iface)) {
1537 TAP_LOG(ERR, "Remote feature requires flow support.");
1543 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
1544 strerror(errno), errno);
1545 tap_flow_implicit_flush(pmd, NULL);
1548 if (pmd->ioctl_sock > 0)
1549 close(pmd->ioctl_sock);
1550 rte_eth_dev_release_port(dev);
1553 TAP_LOG(ERR, "%s Unable to initialize %s",
1554 tuntap_name, rte_vdev_device_name(vdev));
1560 set_interface_name(const char *key __rte_unused,
1564 char *name = (char *)extra_args;
1567 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN - 1);
1569 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
1570 DEFAULT_TAP_NAME, (tap_unit - 1));
1576 set_remote_iface(const char *key __rte_unused,
1580 char *name = (char *)extra_args;
1583 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1588 static int parse_user_mac(struct ether_addr *user_mac,
1591 unsigned int index = 0;
1592 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
1594 if (user_mac == NULL || value == NULL)
1597 strlcpy(mac_temp, value, sizeof(mac_temp));
1598 mac_byte = strtok(mac_temp, ":");
1600 while ((mac_byte != NULL) &&
1601 (strlen(mac_byte) <= 2) &&
1602 (strlen(mac_byte) == strspn(mac_byte,
1603 ETH_TAP_CMP_MAC_FMT))) {
1604 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
1605 mac_byte = strtok(NULL, ":");
1612 set_mac_type(const char *key __rte_unused,
1616 struct ether_addr *user_mac = extra_args;
1621 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
1622 static int iface_idx;
1624 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1625 memcpy((char *)user_mac->addr_bytes, "\0dtap", ETHER_ADDR_LEN);
1626 user_mac->addr_bytes[ETHER_ADDR_LEN - 1] = iface_idx++ + '0';
1630 if (parse_user_mac(user_mac, value) != 6)
1633 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
1637 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
1638 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
1643 * Open a TUN interface device. TUN PMD
1644 * 1) sets tap_type as false
1645 * 2) intakes iface as argument.
1646 * 3) as interface is virtual set speed to 10G
1649 rte_pmd_tun_probe(struct rte_vdev_device *dev)
1651 const char *name, *params;
1653 struct rte_kvargs *kvlist = NULL;
1654 char tun_name[RTE_ETH_NAME_MAX_LEN];
1655 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1657 strcpy(tuntap_name, "TUN");
1659 name = rte_vdev_device_name(dev);
1660 params = rte_vdev_device_args(dev);
1661 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1663 snprintf(tun_name, sizeof(tun_name), "%s%u",
1664 DEFAULT_TUN_NAME, tun_unit++);
1666 if (params && (params[0] != '\0')) {
1667 TAP_LOG(DEBUG, "parameters (%s)", params);
1669 kvlist = rte_kvargs_parse(params, valid_arguments);
1671 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1672 ret = rte_kvargs_process(kvlist,
1674 &set_interface_name,
1682 pmd_link.link_speed = ETH_SPEED_NUM_10G;
1684 TAP_LOG(NOTICE, "Initializing pmd_tun for %s as %s",
1687 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0,
1688 ETH_TUNTAP_TYPE_TUN);
1692 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
1694 tun_unit--; /* Restore the unit number */
1696 rte_kvargs_free(kvlist);
1701 /* Open a TAP interface device.
1704 rte_pmd_tap_probe(struct rte_vdev_device *dev)
1706 const char *name, *params;
1708 struct rte_kvargs *kvlist = NULL;
1710 char tap_name[RTE_ETH_NAME_MAX_LEN];
1711 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1712 struct ether_addr user_mac = { .addr_bytes = {0} };
1713 struct rte_eth_dev *eth_dev;
1715 strcpy(tuntap_name, "TAP");
1717 name = rte_vdev_device_name(dev);
1718 params = rte_vdev_device_args(dev);
1720 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1721 strlen(params) == 0) {
1722 eth_dev = rte_eth_dev_attach_secondary(name);
1724 TAP_LOG(ERR, "Failed to probe %s", name);
1727 /* TODO: request info from primary to set up Rx and Tx */
1728 eth_dev->dev_ops = &ops;
1729 rte_eth_dev_probing_finish(eth_dev);
1733 speed = ETH_SPEED_NUM_10G;
1734 snprintf(tap_name, sizeof(tap_name), "%s%d",
1735 DEFAULT_TAP_NAME, tap_unit++);
1736 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1738 if (params && (params[0] != '\0')) {
1739 TAP_LOG(DEBUG, "parameters (%s)", params);
1741 kvlist = rte_kvargs_parse(params, valid_arguments);
1743 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1744 ret = rte_kvargs_process(kvlist,
1746 &set_interface_name,
1752 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
1753 ret = rte_kvargs_process(kvlist,
1761 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
1762 ret = rte_kvargs_process(kvlist,
1771 pmd_link.link_speed = speed;
1773 TAP_LOG(NOTICE, "Initializing pmd_tap for %s as %s",
1776 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac,
1777 ETH_TUNTAP_TYPE_TAP);
1781 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
1783 tap_unit--; /* Restore the unit number */
1785 rte_kvargs_free(kvlist);
1790 /* detach a TUNTAP device.
1793 rte_pmd_tap_remove(struct rte_vdev_device *dev)
1795 struct rte_eth_dev *eth_dev = NULL;
1796 struct pmd_internals *internals;
1799 /* find the ethdev entry */
1800 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1804 internals = eth_dev->data->dev_private;
1806 TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
1807 (internals->type == ETH_TUNTAP_TYPE_TAP) ? "TAP" : "TUN",
1810 if (internals->nlsk_fd) {
1811 tap_flow_flush(eth_dev, NULL);
1812 tap_flow_implicit_flush(internals, NULL);
1813 tap_nl_final(internals->nlsk_fd);
1815 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1816 if (internals->rxq[i].fd != -1) {
1817 close(internals->rxq[i].fd);
1818 internals->rxq[i].fd = -1;
1820 if (internals->txq[i].fd != -1) {
1821 close(internals->txq[i].fd);
1822 internals->txq[i].fd = -1;
1826 close(internals->ioctl_sock);
1827 rte_free(eth_dev->data->dev_private);
1828 rte_eth_dev_release_port(eth_dev);
1830 if (internals->ka_fd != -1) {
1831 close(internals->ka_fd);
1832 internals->ka_fd = -1;
1837 static struct rte_vdev_driver pmd_tun_drv = {
1838 .probe = rte_pmd_tun_probe,
1839 .remove = rte_pmd_tap_remove,
1842 static struct rte_vdev_driver pmd_tap_drv = {
1843 .probe = rte_pmd_tap_probe,
1844 .remove = rte_pmd_tap_remove,
1847 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1848 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
1849 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1850 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
1851 ETH_TAP_IFACE_ARG "=<string> ");
1852 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
1853 ETH_TAP_IFACE_ARG "=<string> "
1854 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
1855 ETH_TAP_REMOTE_ARG "=<string>");
1858 RTE_INIT(tap_init_log);
1862 tap_logtype = rte_log_register("pmd.net.tap");
1863 if (tap_logtype >= 0)
1864 rte_log_set_level(tap_logtype, RTE_LOG_NOTICE);