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>
38 #include <rte_eth_tap.h>
40 #include <tap_netlink.h>
41 #include <tap_tcmsgs.h>
43 /* Linux based path to the TUN device */
44 #define TUN_TAP_DEV_PATH "/dev/net/tun"
45 #define DEFAULT_TAP_NAME "dtap"
46 #define DEFAULT_TUN_NAME "dtun"
48 #define ETH_TAP_IFACE_ARG "iface"
49 #define ETH_TAP_REMOTE_ARG "remote"
50 #define ETH_TAP_MAC_ARG "mac"
51 #define ETH_TAP_MAC_FIXED "fixed"
53 #define ETH_TAP_USR_MAC_FMT "xx:xx:xx:xx:xx:xx"
54 #define ETH_TAP_CMP_MAC_FMT "0123456789ABCDEFabcdef"
55 #define ETH_TAP_MAC_ARG_FMT ETH_TAP_MAC_FIXED "|" ETH_TAP_USR_MAC_FMT
57 static struct rte_vdev_driver pmd_tap_drv;
58 static struct rte_vdev_driver pmd_tun_drv;
60 static const char *valid_arguments[] = {
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 = (tap_type) ? IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
119 snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
121 RTE_LOG(DEBUG, PMD, "ifr_name '%s'\n", ifr.ifr_name);
123 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
125 RTE_LOG(ERR, PMD, "Unable to create %s interface\n",
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, "%s unable to get TUN/TAP features\n",
137 RTE_LOG(DEBUG, PMD, "%s Features %08x\n", tuntap_name, features);
139 if (features & IFF_MULTI_QUEUE) {
140 RTE_LOG(DEBUG, PMD, " Multi-queue support for %d queues\n",
141 RTE_PMD_TAP_MAX_QUEUES);
142 ifr.ifr_flags |= IFF_MULTI_QUEUE;
146 ifr.ifr_flags |= IFF_ONE_QUEUE;
147 RTE_LOG(DEBUG, PMD, " Single queue only support\n");
150 /* Set the TUN/TAP configuration and set the name if needed */
151 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
152 RTE_LOG(WARNING, PMD,
153 "Unable to set TUNSETIFF for %s\n",
159 /* Always set the file descriptor to non-blocking */
160 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
161 RTE_LOG(WARNING, PMD,
162 "Unable to set %s to nonblocking\n",
164 perror("F_SETFL, NONBLOCK");
168 /* Set up trigger to optimize empty Rx bursts */
172 int flags = fcntl(fd, F_GETFL);
174 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
176 if (sa.sa_handler != tap_trigger_cb) {
178 * Make sure SIGIO is not already taken. This is done
179 * as late as possible to leave the application a
180 * chance to set up its own signal handler first.
182 if (sa.sa_handler != SIG_IGN &&
183 sa.sa_handler != SIG_DFL) {
187 sa = (struct sigaction){
188 .sa_flags = SA_RESTART,
189 .sa_handler = tap_trigger_cb,
191 if (sigaction(SIGIO, &sa, NULL) == -1)
194 /* Enable SIGIO on file descriptor */
195 fcntl(fd, F_SETFL, flags | O_ASYNC);
196 fcntl(fd, F_SETOWN, getpid());
199 /* Disable trigger globally in case of error */
201 RTE_LOG(WARNING, PMD, "Rx trigger disabled: %s\n",
214 tap_verify_csum(struct rte_mbuf *mbuf)
216 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
217 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
218 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
219 unsigned int l2_len = sizeof(struct ether_hdr);
225 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
227 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
229 /* Don't verify checksum for packets with discontinuous L2 header */
230 if (unlikely(l2_len + sizeof(struct ipv4_hdr) >
231 rte_pktmbuf_data_len(mbuf)))
233 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
234 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
235 struct ipv4_hdr *iph = l3_hdr;
237 /* ihl contains the number of 4-byte words in the header */
238 l3_len = 4 * (iph->version_ihl & 0xf);
239 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
242 cksum = ~rte_raw_cksum(iph, l3_len);
243 mbuf->ol_flags |= cksum ?
244 PKT_RX_IP_CKSUM_BAD :
245 PKT_RX_IP_CKSUM_GOOD;
246 } else if (l3 == RTE_PTYPE_L3_IPV6) {
247 l3_len = sizeof(struct ipv6_hdr);
249 /* IPv6 extensions are not supported */
252 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
253 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
254 /* Don't verify checksum for multi-segment packets. */
255 if (mbuf->nb_segs > 1)
257 if (l3 == RTE_PTYPE_L3_IPV4)
258 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
259 else if (l3 == RTE_PTYPE_L3_IPV6)
260 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
261 mbuf->ol_flags |= cksum ?
262 PKT_RX_L4_CKSUM_BAD :
263 PKT_RX_L4_CKSUM_GOOD;
268 tap_rx_offload_get_port_capa(void)
271 * No specific port Rx offload capabilities.
277 tap_rx_offload_get_queue_capa(void)
279 return DEV_RX_OFFLOAD_SCATTER |
280 DEV_RX_OFFLOAD_IPV4_CKSUM |
281 DEV_RX_OFFLOAD_UDP_CKSUM |
282 DEV_RX_OFFLOAD_TCP_CKSUM |
283 DEV_RX_OFFLOAD_CRC_STRIP;
287 tap_rxq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
289 uint64_t port_offloads = dev->data->dev_conf.rxmode.offloads;
290 uint64_t queue_supp_offloads = tap_rx_offload_get_queue_capa();
291 uint64_t port_supp_offloads = tap_rx_offload_get_port_capa();
293 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
296 if ((port_offloads ^ offloads) & port_supp_offloads)
301 /* Callback to handle the rx burst of packets to the correct interface and
302 * file descriptor(s) in a multi-queue setup.
305 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
307 struct rx_queue *rxq = queue;
309 unsigned long num_rx_bytes = 0;
310 uint32_t trigger = tap_trigger;
312 if (trigger == rxq->trigger_seen)
315 rxq->trigger_seen = trigger;
316 rte_compiler_barrier();
317 for (num_rx = 0; num_rx < nb_pkts; ) {
318 struct rte_mbuf *mbuf = rxq->pool;
319 struct rte_mbuf *seg = NULL;
320 struct rte_mbuf *new_tail = NULL;
321 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
324 len = readv(rxq->fd, *rxq->iovecs,
326 (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
327 rxq->nb_rx_desc : 1));
328 if (len < (int)sizeof(struct tun_pi))
331 /* Packet couldn't fit in the provided mbuf */
332 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
333 rxq->stats.ierrors++;
337 len -= sizeof(struct tun_pi);
340 mbuf->port = rxq->in_port;
342 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
344 if (unlikely(!buf)) {
345 rxq->stats.rx_nombuf++;
346 /* No new buf has been allocated: do nothing */
347 if (!new_tail || !seg)
351 rte_pktmbuf_free(mbuf);
355 seg = seg ? seg->next : mbuf;
356 if (rxq->pool == mbuf)
359 new_tail->next = buf;
361 new_tail->next = seg->next;
363 /* iovecs[0] is reserved for packet info (pi) */
364 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
365 buf->buf_len - data_off;
366 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
367 (char *)buf->buf_addr + data_off;
369 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
370 seg->data_off = data_off;
372 len -= seg->data_len;
376 /* First segment has headroom, not the others */
380 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
382 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
383 tap_verify_csum(mbuf);
385 /* account for the receive frame */
386 bufs[num_rx++] = mbuf;
387 num_rx_bytes += mbuf->pkt_len;
390 rxq->stats.ipackets += num_rx;
391 rxq->stats.ibytes += num_rx_bytes;
397 tap_tx_offload_get_port_capa(void)
400 * No specific port Tx offload capabilities.
406 tap_tx_offload_get_queue_capa(void)
408 return DEV_TX_OFFLOAD_MULTI_SEGS |
409 DEV_TX_OFFLOAD_IPV4_CKSUM |
410 DEV_TX_OFFLOAD_UDP_CKSUM |
411 DEV_TX_OFFLOAD_TCP_CKSUM;
415 tap_txq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
417 uint64_t port_offloads = dev->data->dev_conf.txmode.offloads;
418 uint64_t queue_supp_offloads = tap_tx_offload_get_queue_capa();
419 uint64_t port_supp_offloads = tap_tx_offload_get_port_capa();
421 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
424 /* Verify we have no conflict with port offloads */
425 if ((port_offloads ^ offloads) & port_supp_offloads)
431 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
434 void *l3_hdr = packet + l2_len;
436 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
437 struct ipv4_hdr *iph = l3_hdr;
440 iph->hdr_checksum = 0;
441 cksum = rte_raw_cksum(iph, l3_len);
442 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
444 if (ol_flags & PKT_TX_L4_MASK) {
450 l4_hdr = packet + l2_len + l3_len;
451 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
452 l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
453 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
454 l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
458 if (ol_flags & PKT_TX_IPV4) {
459 struct ipv4_hdr *iph = l3_hdr;
461 l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len;
462 cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
464 struct ipv6_hdr *ip6h = l3_hdr;
466 /* payload_len does not include ext headers */
467 l4_len = rte_be_to_cpu_16(ip6h->payload_len) -
468 l3_len + sizeof(struct ipv6_hdr);
469 cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
471 cksum += rte_raw_cksum(l4_hdr, l4_len);
472 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
473 cksum = (~cksum) & 0xffff;
480 /* Callback to handle sending packets from the tap interface
483 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
485 struct tx_queue *txq = queue;
487 unsigned long num_tx_bytes = 0;
491 if (unlikely(nb_pkts == 0))
494 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
495 for (i = 0; i < nb_pkts; i++) {
496 struct rte_mbuf *mbuf = bufs[num_tx];
497 struct iovec iovecs[mbuf->nb_segs + 1];
498 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
499 struct rte_mbuf *seg = mbuf;
500 char m_copy[mbuf->data_len];
504 /* stats.errs will be incremented */
505 if (rte_pktmbuf_pkt_len(mbuf) > max_size)
509 * TUN and TAP are created with IFF_NO_PI disabled.
510 * For TUN PMD this mandatory as fields are used by
511 * Kernel tun.c to determine whether its IP or non IP
514 * The logic fetches the first byte of data from mbuf.
515 * compares whether its v4 or v6. If none matches default
516 * value 0x00 is taken for protocol field.
518 char *buff_data = rte_pktmbuf_mtod(seg, void *);
519 j = (*buff_data & 0xf0);
520 pi.proto = (j == 0x40) ? 0x0008 :
521 (j == 0x60) ? 0xdd86 : 0x00;
523 iovecs[0].iov_base = π
524 iovecs[0].iov_len = sizeof(pi);
525 for (j = 1; j <= mbuf->nb_segs; j++) {
526 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
528 rte_pktmbuf_mtod(seg, void *);
532 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
533 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
534 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
535 /* Support only packets with all data in the same seg */
536 if (mbuf->nb_segs > 1)
538 /* To change checksums, work on a copy of data. */
539 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
540 rte_pktmbuf_data_len(mbuf));
541 tap_tx_offload(m_copy, mbuf->ol_flags,
542 mbuf->l2_len, mbuf->l3_len);
543 iovecs[1].iov_base = m_copy;
545 /* copy the tx frame data */
546 n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
551 num_tx_bytes += mbuf->pkt_len;
552 rte_pktmbuf_free(mbuf);
555 txq->stats.opackets += num_tx;
556 txq->stats.errs += nb_pkts - num_tx;
557 txq->stats.obytes += num_tx_bytes;
563 tap_ioctl_req2str(unsigned long request)
567 return "SIOCSIFFLAGS";
569 return "SIOCGIFFLAGS";
571 return "SIOCGIFHWADDR";
573 return "SIOCSIFHWADDR";
581 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
582 struct ifreq *ifr, int set, enum ioctl_mode mode)
584 short req_flags = ifr->ifr_flags;
585 int remote = pmd->remote_if_index &&
586 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
588 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
591 * If there is a remote netdevice, apply ioctl on it, then apply it on
596 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
597 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
598 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
601 /* fetch current flags to leave other flags untouched */
602 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
605 ifr->ifr_flags |= req_flags;
607 ifr->ifr_flags &= ~req_flags;
615 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
619 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
621 if (remote-- && mode == LOCAL_AND_REMOTE)
626 RTE_LOG(DEBUG, PMD, "%s: %s(%s) failed: %s(%d)\n", ifr->ifr_name,
627 __func__, tap_ioctl_req2str(request), strerror(errno), errno);
632 tap_link_set_down(struct rte_eth_dev *dev)
634 struct pmd_internals *pmd = dev->data->dev_private;
635 struct ifreq ifr = { .ifr_flags = IFF_UP };
637 dev->data->dev_link.link_status = ETH_LINK_DOWN;
638 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
642 tap_link_set_up(struct rte_eth_dev *dev)
644 struct pmd_internals *pmd = dev->data->dev_private;
645 struct ifreq ifr = { .ifr_flags = IFF_UP };
647 dev->data->dev_link.link_status = ETH_LINK_UP;
648 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
652 tap_dev_start(struct rte_eth_dev *dev)
656 err = tap_intr_handle_set(dev, 1);
659 return tap_link_set_up(dev);
662 /* This function gets called when the current port gets stopped.
665 tap_dev_stop(struct rte_eth_dev *dev)
667 tap_intr_handle_set(dev, 0);
668 tap_link_set_down(dev);
672 tap_dev_configure(struct rte_eth_dev *dev)
674 uint64_t supp_tx_offloads = tap_tx_offload_get_port_capa() |
675 tap_tx_offload_get_queue_capa();
676 uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
678 if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
681 "Some Tx offloads are not supported "
682 "requested 0x%" PRIx64 " supported 0x%" PRIx64 "\n",
683 tx_offloads, supp_tx_offloads);
686 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
688 "%s: number of rx queues %d exceeds max num of queues %d\n",
690 dev->data->nb_rx_queues,
691 RTE_PMD_TAP_MAX_QUEUES);
694 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
696 "%s: number of tx queues %d exceeds max num of queues %d\n",
698 dev->data->nb_tx_queues,
699 RTE_PMD_TAP_MAX_QUEUES);
703 RTE_LOG(INFO, PMD, "%s: %p: TX configured queues number: %u\n",
704 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
706 RTE_LOG(INFO, PMD, "%s: %p: RX configured queues number: %u\n",
707 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
713 tap_dev_speed_capa(void)
715 uint32_t speed = pmd_link.link_speed;
718 if (speed >= ETH_SPEED_NUM_10M)
719 capa |= ETH_LINK_SPEED_10M;
720 if (speed >= ETH_SPEED_NUM_100M)
721 capa |= ETH_LINK_SPEED_100M;
722 if (speed >= ETH_SPEED_NUM_1G)
723 capa |= ETH_LINK_SPEED_1G;
724 if (speed >= ETH_SPEED_NUM_5G)
725 capa |= ETH_LINK_SPEED_2_5G;
726 if (speed >= ETH_SPEED_NUM_5G)
727 capa |= ETH_LINK_SPEED_5G;
728 if (speed >= ETH_SPEED_NUM_10G)
729 capa |= ETH_LINK_SPEED_10G;
730 if (speed >= ETH_SPEED_NUM_20G)
731 capa |= ETH_LINK_SPEED_20G;
732 if (speed >= ETH_SPEED_NUM_25G)
733 capa |= ETH_LINK_SPEED_25G;
734 if (speed >= ETH_SPEED_NUM_40G)
735 capa |= ETH_LINK_SPEED_40G;
736 if (speed >= ETH_SPEED_NUM_50G)
737 capa |= ETH_LINK_SPEED_50G;
738 if (speed >= ETH_SPEED_NUM_56G)
739 capa |= ETH_LINK_SPEED_56G;
740 if (speed >= ETH_SPEED_NUM_100G)
741 capa |= ETH_LINK_SPEED_100G;
747 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
749 struct pmd_internals *internals = dev->data->dev_private;
751 dev_info->if_index = internals->if_index;
752 dev_info->max_mac_addrs = 1;
753 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
754 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
755 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
756 dev_info->min_rx_bufsize = 0;
757 dev_info->speed_capa = tap_dev_speed_capa();
758 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
759 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
760 dev_info->rx_queue_offload_capa;
761 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
762 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
763 dev_info->tx_queue_offload_capa;
767 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
769 unsigned int i, imax;
770 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
771 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
772 unsigned long rx_nombuf = 0, ierrors = 0;
773 const struct pmd_internals *pmd = dev->data->dev_private;
775 /* rx queue statistics */
776 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
777 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
778 for (i = 0; i < imax; i++) {
779 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
780 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
781 rx_total += tap_stats->q_ipackets[i];
782 rx_bytes_total += tap_stats->q_ibytes[i];
783 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
784 ierrors += pmd->rxq[i].stats.ierrors;
787 /* tx queue statistics */
788 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
789 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
791 for (i = 0; i < imax; i++) {
792 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
793 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
794 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
795 tx_total += tap_stats->q_opackets[i];
796 tx_err_total += tap_stats->q_errors[i];
797 tx_bytes_total += tap_stats->q_obytes[i];
800 tap_stats->ipackets = rx_total;
801 tap_stats->ibytes = rx_bytes_total;
802 tap_stats->ierrors = ierrors;
803 tap_stats->rx_nombuf = rx_nombuf;
804 tap_stats->opackets = tx_total;
805 tap_stats->oerrors = tx_err_total;
806 tap_stats->obytes = tx_bytes_total;
811 tap_stats_reset(struct rte_eth_dev *dev)
814 struct pmd_internals *pmd = dev->data->dev_private;
816 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
817 pmd->rxq[i].stats.ipackets = 0;
818 pmd->rxq[i].stats.ibytes = 0;
819 pmd->rxq[i].stats.ierrors = 0;
820 pmd->rxq[i].stats.rx_nombuf = 0;
822 pmd->txq[i].stats.opackets = 0;
823 pmd->txq[i].stats.errs = 0;
824 pmd->txq[i].stats.obytes = 0;
829 tap_dev_close(struct rte_eth_dev *dev)
832 struct pmd_internals *internals = dev->data->dev_private;
834 tap_link_set_down(dev);
835 tap_flow_flush(dev, NULL);
836 tap_flow_implicit_flush(internals, NULL);
838 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
839 if (internals->rxq[i].fd != -1) {
840 close(internals->rxq[i].fd);
841 internals->rxq[i].fd = -1;
843 if (internals->txq[i].fd != -1) {
844 close(internals->txq[i].fd);
845 internals->txq[i].fd = -1;
849 if (internals->remote_if_index) {
850 /* Restore initial remote state */
851 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
852 &internals->remote_initial_flags);
857 tap_rx_queue_release(void *queue)
859 struct rx_queue *rxq = queue;
861 if (rxq && (rxq->fd > 0)) {
864 rte_pktmbuf_free(rxq->pool);
865 rte_free(rxq->iovecs);
872 tap_tx_queue_release(void *queue)
874 struct tx_queue *txq = queue;
876 if (txq && (txq->fd > 0)) {
883 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
885 struct rte_eth_link *dev_link = &dev->data->dev_link;
886 struct pmd_internals *pmd = dev->data->dev_private;
887 struct ifreq ifr = { .ifr_flags = 0 };
889 if (pmd->remote_if_index) {
890 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
891 if (!(ifr.ifr_flags & IFF_UP) ||
892 !(ifr.ifr_flags & IFF_RUNNING)) {
893 dev_link->link_status = ETH_LINK_DOWN;
897 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
898 dev_link->link_status =
899 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
906 tap_promisc_enable(struct rte_eth_dev *dev)
908 struct pmd_internals *pmd = dev->data->dev_private;
909 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
911 dev->data->promiscuous = 1;
912 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
913 if (pmd->remote_if_index && !pmd->flow_isolate)
914 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
918 tap_promisc_disable(struct rte_eth_dev *dev)
920 struct pmd_internals *pmd = dev->data->dev_private;
921 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
923 dev->data->promiscuous = 0;
924 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
925 if (pmd->remote_if_index && !pmd->flow_isolate)
926 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
930 tap_allmulti_enable(struct rte_eth_dev *dev)
932 struct pmd_internals *pmd = dev->data->dev_private;
933 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
935 dev->data->all_multicast = 1;
936 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
937 if (pmd->remote_if_index && !pmd->flow_isolate)
938 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
942 tap_allmulti_disable(struct rte_eth_dev *dev)
944 struct pmd_internals *pmd = dev->data->dev_private;
945 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
947 dev->data->all_multicast = 0;
948 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
949 if (pmd->remote_if_index && !pmd->flow_isolate)
950 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
954 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
956 struct pmd_internals *pmd = dev->data->dev_private;
957 enum ioctl_mode mode = LOCAL_ONLY;
961 if (is_zero_ether_addr(mac_addr)) {
962 RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
966 /* Check the actual current MAC address on the tap netdevice */
967 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
970 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
973 /* Check the current MAC address on the remote */
974 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
977 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
979 mode = LOCAL_AND_REMOTE;
980 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
981 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
982 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
985 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
986 if (pmd->remote_if_index && !pmd->flow_isolate) {
987 /* Replace MAC redirection rule after a MAC change */
988 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
991 "%s: Couldn't delete MAC redirection rule\n",
995 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
998 "%s: Couldn't add MAC redirection rule\n",
1008 tap_setup_queue(struct rte_eth_dev *dev,
1009 struct pmd_internals *internals,
1016 struct pmd_internals *pmd = dev->data->dev_private;
1017 struct rx_queue *rx = &internals->rxq[qid];
1018 struct tx_queue *tx = &internals->txq[qid];
1030 /* fd for this queue already exists */
1031 RTE_LOG(DEBUG, PMD, "%s: fd %d for %s queue qid %d exists\n",
1032 pmd->name, *fd, dir, qid);
1033 } else if (*other_fd != -1) {
1034 /* Only other_fd exists. dup it */
1035 *fd = dup(*other_fd);
1038 RTE_LOG(ERR, PMD, "%s: dup() failed.\n",
1042 RTE_LOG(DEBUG, PMD, "%s: dup fd %d for %s queue qid %d (%d)\n",
1043 pmd->name, *other_fd, dir, qid, *fd);
1045 /* Both RX and TX fds do not exist (equal -1). Create fd */
1046 *fd = tun_alloc(pmd);
1048 *fd = -1; /* restore original value */
1049 RTE_LOG(ERR, PMD, "%s: tun_alloc() failed.\n",
1053 RTE_LOG(DEBUG, PMD, "%s: add %s queue for qid %d fd %d\n",
1054 pmd->name, dir, qid, *fd);
1057 tx->mtu = &dev->data->mtu;
1058 rx->rxmode = &dev->data->dev_conf.rxmode;
1064 tap_rx_queue_setup(struct rte_eth_dev *dev,
1065 uint16_t rx_queue_id,
1066 uint16_t nb_rx_desc,
1067 unsigned int socket_id,
1068 const struct rte_eth_rxconf *rx_conf __rte_unused,
1069 struct rte_mempool *mp)
1071 struct pmd_internals *internals = dev->data->dev_private;
1072 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1073 struct rte_mbuf **tmp = &rxq->pool;
1074 long iov_max = sysconf(_SC_IOV_MAX);
1075 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1076 struct iovec (*iovecs)[nb_desc + 1];
1077 int data_off = RTE_PKTMBUF_HEADROOM;
1082 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1083 RTE_LOG(WARNING, PMD,
1084 "nb_rx_queues %d too small or mempool NULL\n",
1085 dev->data->nb_rx_queues);
1089 /* Verify application offloads are valid for our port and queue. */
1090 if (!tap_rxq_are_offloads_valid(dev, rx_conf->offloads)) {
1091 rte_errno = ENOTSUP;
1093 "%p: Rx queue offloads 0x%" PRIx64
1094 " don't match port offloads 0x%" PRIx64
1095 " or supported offloads 0x%" PRIx64 "\n",
1096 (void *)dev, rx_conf->offloads,
1097 dev->data->dev_conf.rxmode.offloads,
1098 (tap_rx_offload_get_port_capa() |
1099 tap_rx_offload_get_queue_capa()));
1103 rxq->trigger_seen = 1; /* force initial burst */
1104 rxq->in_port = dev->data->port_id;
1105 rxq->nb_rx_desc = nb_desc;
1106 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1109 RTE_LOG(WARNING, PMD,
1110 "%s: Couldn't allocate %d RX descriptors\n",
1111 dev->device->name, nb_desc);
1114 rxq->iovecs = iovecs;
1116 dev->data->rx_queues[rx_queue_id] = rxq;
1117 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1123 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1124 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1126 for (i = 1; i <= nb_desc; i++) {
1127 *tmp = rte_pktmbuf_alloc(rxq->mp);
1129 RTE_LOG(WARNING, PMD,
1130 "%s: couldn't allocate memory for queue %d\n",
1131 dev->device->name, rx_queue_id);
1135 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1136 (*rxq->iovecs)[i].iov_base =
1137 (char *)(*tmp)->buf_addr + data_off;
1139 tmp = &(*tmp)->next;
1142 RTE_LOG(DEBUG, PMD, " RX TUNTAP device name %s, qid %d on fd %d\n",
1143 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
1148 rte_pktmbuf_free(rxq->pool);
1150 rte_free(rxq->iovecs);
1156 tap_tx_queue_setup(struct rte_eth_dev *dev,
1157 uint16_t tx_queue_id,
1158 uint16_t nb_tx_desc __rte_unused,
1159 unsigned int socket_id __rte_unused,
1160 const struct rte_eth_txconf *tx_conf)
1162 struct pmd_internals *internals = dev->data->dev_private;
1163 struct tx_queue *txq;
1166 if (tx_queue_id >= dev->data->nb_tx_queues)
1168 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1169 txq = dev->data->tx_queues[tx_queue_id];
1171 * Don't verify port offloads for application which
1174 if (tx_conf != NULL &&
1175 !!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)) {
1176 if (tap_txq_are_offloads_valid(dev, tx_conf->offloads)) {
1177 txq->csum = !!(tx_conf->offloads &
1178 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1179 DEV_TX_OFFLOAD_UDP_CKSUM |
1180 DEV_TX_OFFLOAD_TCP_CKSUM));
1182 rte_errno = ENOTSUP;
1184 "%p: Tx queue offloads 0x%" PRIx64
1185 " don't match port offloads 0x%" PRIx64
1186 " or supported offloads 0x%" PRIx64,
1187 (void *)dev, tx_conf->offloads,
1188 dev->data->dev_conf.txmode.offloads,
1189 (tap_tx_offload_get_port_capa() |
1190 tap_tx_offload_get_queue_capa()));
1194 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1198 " TX TUNTAP device name %s, qid %d on fd %d csum %s\n",
1199 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd,
1200 txq->csum ? "on" : "off");
1206 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1208 struct pmd_internals *pmd = dev->data->dev_private;
1209 struct ifreq ifr = { .ifr_mtu = mtu };
1212 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1214 dev->data->mtu = mtu;
1220 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1221 struct ether_addr *mc_addr_set __rte_unused,
1222 uint32_t nb_mc_addr __rte_unused)
1225 * Nothing to do actually: the tap has no filtering whatsoever, every
1226 * packet is received.
1232 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1234 struct rte_eth_dev *dev = arg;
1235 struct pmd_internals *pmd = dev->data->dev_private;
1236 struct ifinfomsg *info = NLMSG_DATA(nh);
1238 if (nh->nlmsg_type != RTM_NEWLINK ||
1239 (info->ifi_index != pmd->if_index &&
1240 info->ifi_index != pmd->remote_if_index))
1242 return tap_link_update(dev, 0);
1246 tap_dev_intr_handler(void *cb_arg)
1248 struct rte_eth_dev *dev = cb_arg;
1249 struct pmd_internals *pmd = dev->data->dev_private;
1251 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1255 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1257 struct pmd_internals *pmd = dev->data->dev_private;
1259 /* In any case, disable interrupt if the conf is no longer there. */
1260 if (!dev->data->dev_conf.intr_conf.lsc) {
1261 if (pmd->intr_handle.fd != -1) {
1262 tap_nl_final(pmd->intr_handle.fd);
1263 rte_intr_callback_unregister(&pmd->intr_handle,
1264 tap_dev_intr_handler, dev);
1269 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1270 if (unlikely(pmd->intr_handle.fd == -1))
1272 return rte_intr_callback_register(
1273 &pmd->intr_handle, tap_dev_intr_handler, dev);
1275 tap_nl_final(pmd->intr_handle.fd);
1276 return rte_intr_callback_unregister(&pmd->intr_handle,
1277 tap_dev_intr_handler, dev);
1281 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1285 err = tap_lsc_intr_handle_set(dev, set);
1288 err = tap_rx_intr_vec_set(dev, set);
1290 tap_lsc_intr_handle_set(dev, 0);
1294 static const uint32_t*
1295 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1297 static const uint32_t ptypes[] = {
1298 RTE_PTYPE_INNER_L2_ETHER,
1299 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1300 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1301 RTE_PTYPE_INNER_L3_IPV4,
1302 RTE_PTYPE_INNER_L3_IPV4_EXT,
1303 RTE_PTYPE_INNER_L3_IPV6,
1304 RTE_PTYPE_INNER_L3_IPV6_EXT,
1305 RTE_PTYPE_INNER_L4_FRAG,
1306 RTE_PTYPE_INNER_L4_UDP,
1307 RTE_PTYPE_INNER_L4_TCP,
1308 RTE_PTYPE_INNER_L4_SCTP,
1310 RTE_PTYPE_L2_ETHER_VLAN,
1311 RTE_PTYPE_L2_ETHER_QINQ,
1313 RTE_PTYPE_L3_IPV4_EXT,
1314 RTE_PTYPE_L3_IPV6_EXT,
1326 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1327 struct rte_eth_fc_conf *fc_conf)
1329 fc_conf->mode = RTE_FC_NONE;
1334 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1335 struct rte_eth_fc_conf *fc_conf)
1337 if (fc_conf->mode != RTE_FC_NONE)
1342 static const struct eth_dev_ops ops = {
1343 .dev_start = tap_dev_start,
1344 .dev_stop = tap_dev_stop,
1345 .dev_close = tap_dev_close,
1346 .dev_configure = tap_dev_configure,
1347 .dev_infos_get = tap_dev_info,
1348 .rx_queue_setup = tap_rx_queue_setup,
1349 .tx_queue_setup = tap_tx_queue_setup,
1350 .rx_queue_release = tap_rx_queue_release,
1351 .tx_queue_release = tap_tx_queue_release,
1352 .flow_ctrl_get = tap_flow_ctrl_get,
1353 .flow_ctrl_set = tap_flow_ctrl_set,
1354 .link_update = tap_link_update,
1355 .dev_set_link_up = tap_link_set_up,
1356 .dev_set_link_down = tap_link_set_down,
1357 .promiscuous_enable = tap_promisc_enable,
1358 .promiscuous_disable = tap_promisc_disable,
1359 .allmulticast_enable = tap_allmulti_enable,
1360 .allmulticast_disable = tap_allmulti_disable,
1361 .mac_addr_set = tap_mac_set,
1362 .mtu_set = tap_mtu_set,
1363 .set_mc_addr_list = tap_set_mc_addr_list,
1364 .stats_get = tap_stats_get,
1365 .stats_reset = tap_stats_reset,
1366 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1367 .filter_ctrl = tap_dev_filter_ctrl,
1371 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1372 char *remote_iface, struct ether_addr *mac_addr)
1374 int numa_node = rte_socket_id();
1375 struct rte_eth_dev *dev;
1376 struct pmd_internals *pmd;
1377 struct rte_eth_dev_data *data;
1381 RTE_LOG(DEBUG, PMD, "%s device on numa %u\n",
1382 tuntap_name, rte_socket_id());
1384 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1386 RTE_LOG(ERR, PMD, "%s Unable to allocate device struct\n",
1388 goto error_exit_nodev;
1391 pmd = dev->data->dev_private;
1393 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1395 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1396 if (pmd->ioctl_sock == -1) {
1398 "%s Unable to get a socket for management: %s\n",
1399 tuntap_name, strerror(errno));
1403 /* Setup some default values */
1405 data->dev_private = pmd;
1406 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1407 data->numa_node = numa_node;
1409 data->dev_link = pmd_link;
1410 data->mac_addrs = &pmd->eth_addr;
1411 /* Set the number of RX and TX queues */
1412 data->nb_rx_queues = 0;
1413 data->nb_tx_queues = 0;
1415 dev->dev_ops = &ops;
1416 dev->rx_pkt_burst = pmd_rx_burst;
1417 dev->tx_pkt_burst = pmd_tx_burst;
1419 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1420 pmd->intr_handle.fd = -1;
1421 dev->intr_handle = &pmd->intr_handle;
1423 /* Presetup the fds to -1 as being not valid */
1424 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1425 pmd->rxq[i].fd = -1;
1426 pmd->txq[i].fd = -1;
1430 if (is_zero_ether_addr(mac_addr))
1431 eth_random_addr((uint8_t *)&pmd->eth_addr);
1433 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1436 /* Immediately create the netdevice (this will create the 1st queue). */
1438 if (tap_setup_queue(dev, pmd, 0, 1) == -1)
1441 if (tap_setup_queue(dev, pmd, 0, 0) == -1)
1444 ifr.ifr_mtu = dev->data->mtu;
1445 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1449 memset(&ifr, 0, sizeof(struct ifreq));
1450 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1451 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1453 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1458 * Set up everything related to rte_flow:
1460 * - tap / remote if_index
1461 * - mandatory QDISCs
1462 * - rte_flow actual/implicit lists
1465 pmd->nlsk_fd = tap_nl_init(0);
1466 if (pmd->nlsk_fd == -1) {
1467 RTE_LOG(WARNING, PMD, "%s: failed to create netlink socket.\n",
1469 goto disable_rte_flow;
1471 pmd->if_index = if_nametoindex(pmd->name);
1472 if (!pmd->if_index) {
1473 RTE_LOG(ERR, PMD, "%s: failed to get if_index.\n", pmd->name);
1474 goto disable_rte_flow;
1476 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1477 RTE_LOG(ERR, PMD, "%s: failed to create multiq qdisc.\n",
1479 goto disable_rte_flow;
1481 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1482 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1484 goto disable_rte_flow;
1486 LIST_INIT(&pmd->flows);
1488 if (strlen(remote_iface)) {
1489 pmd->remote_if_index = if_nametoindex(remote_iface);
1490 if (!pmd->remote_if_index) {
1491 RTE_LOG(ERR, PMD, "%s: failed to get %s if_index.\n",
1492 pmd->name, remote_iface);
1495 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1496 "%s", remote_iface);
1498 /* Save state of remote device */
1499 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1501 /* Replicate remote MAC address */
1502 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1503 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1504 pmd->name, pmd->remote_iface);
1507 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1509 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1510 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1511 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1512 pmd->name, remote_iface);
1517 * Flush usually returns negative value because it tries to
1518 * delete every QDISC (and on a running device, one QDISC at
1519 * least is needed). Ignore negative return value.
1521 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1522 if (qdisc_create_ingress(pmd->nlsk_fd,
1523 pmd->remote_if_index) < 0) {
1524 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1528 LIST_INIT(&pmd->implicit_flows);
1529 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1530 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1531 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1532 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1534 "%s: failed to create implicit rules.\n",
1543 RTE_LOG(ERR, PMD, " Disabling rte flow support: %s(%d)\n",
1544 strerror(errno), errno);
1545 if (strlen(remote_iface)) {
1546 RTE_LOG(ERR, PMD, "Remote feature requires flow support.\n");
1552 RTE_LOG(ERR, PMD, " Can't set up remote feature: %s(%d)\n",
1553 strerror(errno), errno);
1554 tap_flow_implicit_flush(pmd, NULL);
1557 if (pmd->ioctl_sock > 0)
1558 close(pmd->ioctl_sock);
1559 rte_eth_dev_release_port(dev);
1562 RTE_LOG(ERR, PMD, "%s Unable to initialize %s\n",
1563 tuntap_name, rte_vdev_device_name(vdev));
1569 set_interface_name(const char *key __rte_unused,
1573 char *name = (char *)extra_args;
1576 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN - 1);
1578 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
1579 DEFAULT_TAP_NAME, (tap_unit - 1));
1585 set_remote_iface(const char *key __rte_unused,
1589 char *name = (char *)extra_args;
1592 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1597 static int parse_user_mac(struct ether_addr *user_mac,
1600 unsigned int index = 0;
1601 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
1603 if (user_mac == NULL || value == NULL)
1606 strlcpy(mac_temp, value, sizeof(mac_temp));
1607 mac_byte = strtok(mac_temp, ":");
1609 while ((mac_byte != NULL) &&
1610 (strlen(mac_byte) <= 2) &&
1611 (strlen(mac_byte) == strspn(mac_byte,
1612 ETH_TAP_CMP_MAC_FMT))) {
1613 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
1614 mac_byte = strtok(NULL, ":");
1621 set_mac_type(const char *key __rte_unused,
1625 struct ether_addr *user_mac = extra_args;
1630 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
1631 static int iface_idx;
1633 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1634 memcpy((char *)user_mac->addr_bytes, "\0dtap", ETHER_ADDR_LEN);
1635 user_mac->addr_bytes[ETHER_ADDR_LEN - 1] = iface_idx++ + '0';
1639 if (parse_user_mac(user_mac, value) != 6)
1642 RTE_LOG(DEBUG, PMD, "TAP user MAC param (%s)\n", value);
1646 RTE_LOG(ERR, PMD, "TAP user MAC (%s) is not in format (%s|%s)\n",
1647 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
1652 * Open a TUN interface device. TUN PMD
1653 * 1) sets tap_type as false
1654 * 2) intakes iface as argument.
1655 * 3) as interface is virtual set speed to 10G
1658 rte_pmd_tun_probe(struct rte_vdev_device *dev)
1660 const char *name, *params;
1662 struct rte_kvargs *kvlist = NULL;
1663 char tun_name[RTE_ETH_NAME_MAX_LEN];
1664 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1667 strcpy(tuntap_name, "TUN");
1669 name = rte_vdev_device_name(dev);
1670 params = rte_vdev_device_args(dev);
1671 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1673 if (params && (params[0] != '\0')) {
1674 RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params);
1676 kvlist = rte_kvargs_parse(params, valid_arguments);
1678 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1679 ret = rte_kvargs_process(kvlist,
1681 &set_interface_name,
1689 pmd_link.link_speed = ETH_SPEED_NUM_10G;
1691 RTE_LOG(NOTICE, PMD, "Initializing pmd_tun for %s as %s\n",
1694 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0);
1698 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
1700 tun_unit--; /* Restore the unit number */
1702 rte_kvargs_free(kvlist);
1707 /* Open a TAP interface device.
1710 rte_pmd_tap_probe(struct rte_vdev_device *dev)
1712 const char *name, *params;
1714 struct rte_kvargs *kvlist = NULL;
1716 char tap_name[RTE_ETH_NAME_MAX_LEN];
1717 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1718 struct ether_addr user_mac = { .addr_bytes = {0} };
1719 struct rte_eth_dev *eth_dev;
1722 strcpy(tuntap_name, "TAP");
1724 name = rte_vdev_device_name(dev);
1725 params = rte_vdev_device_args(dev);
1727 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1728 strlen(params) == 0) {
1729 eth_dev = rte_eth_dev_attach_secondary(name);
1731 RTE_LOG(ERR, PMD, "Failed to probe %s\n", name);
1734 /* TODO: request info from primary to set up Rx and Tx */
1735 eth_dev->dev_ops = &ops;
1739 speed = ETH_SPEED_NUM_10G;
1740 snprintf(tap_name, sizeof(tap_name), "%s%d",
1741 DEFAULT_TAP_NAME, tap_unit++);
1742 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1744 if (params && (params[0] != '\0')) {
1745 RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params);
1747 kvlist = rte_kvargs_parse(params, valid_arguments);
1749 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1750 ret = rte_kvargs_process(kvlist,
1752 &set_interface_name,
1758 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
1759 ret = rte_kvargs_process(kvlist,
1767 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
1768 ret = rte_kvargs_process(kvlist,
1777 pmd_link.link_speed = speed;
1779 RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
1782 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac);
1786 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
1788 tap_unit--; /* Restore the unit number */
1790 rte_kvargs_free(kvlist);
1795 /* detach a TUNTAP device.
1798 rte_pmd_tap_remove(struct rte_vdev_device *dev)
1800 struct rte_eth_dev *eth_dev = NULL;
1801 struct pmd_internals *internals;
1804 RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
1807 /* find the ethdev entry */
1808 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1812 internals = eth_dev->data->dev_private;
1813 if (internals->nlsk_fd) {
1814 tap_flow_flush(eth_dev, NULL);
1815 tap_flow_implicit_flush(internals, NULL);
1816 tap_nl_final(internals->nlsk_fd);
1818 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1819 if (internals->rxq[i].fd != -1) {
1820 close(internals->rxq[i].fd);
1821 internals->rxq[i].fd = -1;
1823 if (internals->txq[i].fd != -1) {
1824 close(internals->txq[i].fd);
1825 internals->txq[i].fd = -1;
1829 close(internals->ioctl_sock);
1830 rte_free(eth_dev->data->dev_private);
1832 rte_eth_dev_release_port(eth_dev);
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,
1846 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1847 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
1848 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1849 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
1850 ETH_TAP_IFACE_ARG "=<string> ");
1851 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
1852 ETH_TAP_IFACE_ARG "=<string> "
1853 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
1854 ETH_TAP_REMOTE_ARG "=<string>");