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 TAP_LOG(DEBUG, "ifr_name '%s'", ifr.ifr_name);
123 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
125 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
129 #ifdef IFF_MULTI_QUEUE
130 /* Grab the TUN features to verify we can work multi-queue */
131 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
132 TAP_LOG(ERR, "%s unable to get TUN/TAP features",
136 TAP_LOG(DEBUG, "%s Features %08x", tuntap_name, features);
138 if (features & IFF_MULTI_QUEUE) {
139 TAP_LOG(DEBUG, " Multi-queue support for %d queues",
140 RTE_PMD_TAP_MAX_QUEUES);
141 ifr.ifr_flags |= IFF_MULTI_QUEUE;
145 ifr.ifr_flags |= IFF_ONE_QUEUE;
146 TAP_LOG(DEBUG, " Single queue only support");
149 /* Set the TUN/TAP configuration and set the name if needed */
150 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
151 TAP_LOG(WARNING, "Unable to set TUNSETIFF for %s: %s",
152 ifr.ifr_name, strerror(errno));
156 /* Always set the file descriptor to non-blocking */
157 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
159 "Unable to set %s to nonblocking: %s",
160 ifr.ifr_name, strerror(errno));
164 /* Set up trigger to optimize empty Rx bursts */
168 int flags = fcntl(fd, F_GETFL);
170 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
172 if (sa.sa_handler != tap_trigger_cb) {
174 * Make sure SIGIO is not already taken. This is done
175 * as late as possible to leave the application a
176 * chance to set up its own signal handler first.
178 if (sa.sa_handler != SIG_IGN &&
179 sa.sa_handler != SIG_DFL) {
183 sa = (struct sigaction){
184 .sa_flags = SA_RESTART,
185 .sa_handler = tap_trigger_cb,
187 if (sigaction(SIGIO, &sa, NULL) == -1)
190 /* Enable SIGIO on file descriptor */
191 fcntl(fd, F_SETFL, flags | O_ASYNC);
192 fcntl(fd, F_SETOWN, getpid());
196 /* Disable trigger globally in case of error */
198 TAP_LOG(WARNING, "Rx trigger disabled: %s",
211 tap_verify_csum(struct rte_mbuf *mbuf)
213 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
214 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
215 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
216 unsigned int l2_len = sizeof(struct ether_hdr);
222 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
224 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
226 /* Don't verify checksum for packets with discontinuous L2 header */
227 if (unlikely(l2_len + sizeof(struct ipv4_hdr) >
228 rte_pktmbuf_data_len(mbuf)))
230 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
231 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
232 struct ipv4_hdr *iph = l3_hdr;
234 /* ihl contains the number of 4-byte words in the header */
235 l3_len = 4 * (iph->version_ihl & 0xf);
236 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
239 cksum = ~rte_raw_cksum(iph, l3_len);
240 mbuf->ol_flags |= cksum ?
241 PKT_RX_IP_CKSUM_BAD :
242 PKT_RX_IP_CKSUM_GOOD;
243 } else if (l3 == RTE_PTYPE_L3_IPV6) {
244 l3_len = sizeof(struct ipv6_hdr);
246 /* IPv6 extensions are not supported */
249 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
250 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
251 /* Don't verify checksum for multi-segment packets. */
252 if (mbuf->nb_segs > 1)
254 if (l3 == RTE_PTYPE_L3_IPV4)
255 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
256 else if (l3 == RTE_PTYPE_L3_IPV6)
257 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
258 mbuf->ol_flags |= cksum ?
259 PKT_RX_L4_CKSUM_BAD :
260 PKT_RX_L4_CKSUM_GOOD;
265 tap_rx_offload_get_port_capa(void)
268 * No specific port Rx offload capabilities.
274 tap_rx_offload_get_queue_capa(void)
276 return DEV_RX_OFFLOAD_SCATTER |
277 DEV_RX_OFFLOAD_IPV4_CKSUM |
278 DEV_RX_OFFLOAD_UDP_CKSUM |
279 DEV_RX_OFFLOAD_TCP_CKSUM |
280 DEV_RX_OFFLOAD_CRC_STRIP;
284 tap_rxq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
286 uint64_t port_offloads = dev->data->dev_conf.rxmode.offloads;
287 uint64_t queue_supp_offloads = tap_rx_offload_get_queue_capa();
288 uint64_t port_supp_offloads = tap_rx_offload_get_port_capa();
290 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
293 if ((port_offloads ^ offloads) & port_supp_offloads)
298 /* Callback to handle the rx burst of packets to the correct interface and
299 * file descriptor(s) in a multi-queue setup.
302 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
304 struct rx_queue *rxq = queue;
306 unsigned long num_rx_bytes = 0;
307 uint32_t trigger = tap_trigger;
309 if (trigger == rxq->trigger_seen)
312 rxq->trigger_seen = trigger;
313 rte_compiler_barrier();
314 for (num_rx = 0; num_rx < nb_pkts; ) {
315 struct rte_mbuf *mbuf = rxq->pool;
316 struct rte_mbuf *seg = NULL;
317 struct rte_mbuf *new_tail = NULL;
318 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
321 len = readv(rxq->fd, *rxq->iovecs,
323 (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
324 rxq->nb_rx_desc : 1));
325 if (len < (int)sizeof(struct tun_pi))
328 /* Packet couldn't fit in the provided mbuf */
329 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
330 rxq->stats.ierrors++;
334 len -= sizeof(struct tun_pi);
337 mbuf->port = rxq->in_port;
339 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
341 if (unlikely(!buf)) {
342 rxq->stats.rx_nombuf++;
343 /* No new buf has been allocated: do nothing */
344 if (!new_tail || !seg)
348 rte_pktmbuf_free(mbuf);
352 seg = seg ? seg->next : mbuf;
353 if (rxq->pool == mbuf)
356 new_tail->next = buf;
358 new_tail->next = seg->next;
360 /* iovecs[0] is reserved for packet info (pi) */
361 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
362 buf->buf_len - data_off;
363 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
364 (char *)buf->buf_addr + data_off;
366 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
367 seg->data_off = data_off;
369 len -= seg->data_len;
373 /* First segment has headroom, not the others */
377 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
379 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
380 tap_verify_csum(mbuf);
382 /* account for the receive frame */
383 bufs[num_rx++] = mbuf;
384 num_rx_bytes += mbuf->pkt_len;
387 rxq->stats.ipackets += num_rx;
388 rxq->stats.ibytes += num_rx_bytes;
394 tap_tx_offload_get_port_capa(void)
397 * No specific port Tx offload capabilities.
403 tap_tx_offload_get_queue_capa(void)
405 return DEV_TX_OFFLOAD_MULTI_SEGS |
406 DEV_TX_OFFLOAD_IPV4_CKSUM |
407 DEV_TX_OFFLOAD_UDP_CKSUM |
408 DEV_TX_OFFLOAD_TCP_CKSUM;
412 tap_txq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
414 uint64_t port_offloads = dev->data->dev_conf.txmode.offloads;
415 uint64_t queue_supp_offloads = tap_tx_offload_get_queue_capa();
416 uint64_t port_supp_offloads = tap_tx_offload_get_port_capa();
418 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
421 /* Verify we have no conflict with port offloads */
422 if ((port_offloads ^ offloads) & port_supp_offloads)
428 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
431 void *l3_hdr = packet + l2_len;
433 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
434 struct ipv4_hdr *iph = l3_hdr;
437 iph->hdr_checksum = 0;
438 cksum = rte_raw_cksum(iph, l3_len);
439 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
441 if (ol_flags & PKT_TX_L4_MASK) {
447 l4_hdr = packet + l2_len + l3_len;
448 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
449 l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
450 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
451 l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
455 if (ol_flags & PKT_TX_IPV4) {
456 struct ipv4_hdr *iph = l3_hdr;
458 l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len;
459 cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
461 struct ipv6_hdr *ip6h = l3_hdr;
463 /* payload_len does not include ext headers */
464 l4_len = rte_be_to_cpu_16(ip6h->payload_len) -
465 l3_len + sizeof(struct ipv6_hdr);
466 cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
468 cksum += rte_raw_cksum(l4_hdr, l4_len);
469 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
470 cksum = (~cksum) & 0xffff;
477 /* Callback to handle sending packets from the tap interface
480 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
482 struct tx_queue *txq = queue;
484 unsigned long num_tx_bytes = 0;
488 if (unlikely(nb_pkts == 0))
491 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
492 for (i = 0; i < nb_pkts; i++) {
493 struct rte_mbuf *mbuf = bufs[num_tx];
494 struct iovec iovecs[mbuf->nb_segs + 1];
495 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
496 struct rte_mbuf *seg = mbuf;
497 char m_copy[mbuf->data_len];
501 /* stats.errs will be incremented */
502 if (rte_pktmbuf_pkt_len(mbuf) > max_size)
506 * TUN and TAP are created with IFF_NO_PI disabled.
507 * For TUN PMD this mandatory as fields are used by
508 * Kernel tun.c to determine whether its IP or non IP
511 * The logic fetches the first byte of data from mbuf.
512 * compares whether its v4 or v6. If none matches default
513 * value 0x00 is taken for protocol field.
515 char *buff_data = rte_pktmbuf_mtod(seg, void *);
516 j = (*buff_data & 0xf0);
517 pi.proto = (j == 0x40) ? 0x0008 :
518 (j == 0x60) ? 0xdd86 : 0x00;
520 iovecs[0].iov_base = π
521 iovecs[0].iov_len = sizeof(pi);
522 for (j = 1; j <= mbuf->nb_segs; j++) {
523 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
525 rte_pktmbuf_mtod(seg, void *);
529 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
530 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
531 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
532 /* Support only packets with all data in the same seg */
533 if (mbuf->nb_segs > 1)
535 /* To change checksums, work on a copy of data. */
536 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
537 rte_pktmbuf_data_len(mbuf));
538 tap_tx_offload(m_copy, mbuf->ol_flags,
539 mbuf->l2_len, mbuf->l3_len);
540 iovecs[1].iov_base = m_copy;
542 /* copy the tx frame data */
543 n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
548 num_tx_bytes += mbuf->pkt_len;
549 rte_pktmbuf_free(mbuf);
552 txq->stats.opackets += num_tx;
553 txq->stats.errs += nb_pkts - num_tx;
554 txq->stats.obytes += num_tx_bytes;
560 tap_ioctl_req2str(unsigned long request)
564 return "SIOCSIFFLAGS";
566 return "SIOCGIFFLAGS";
568 return "SIOCGIFHWADDR";
570 return "SIOCSIFHWADDR";
578 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
579 struct ifreq *ifr, int set, enum ioctl_mode mode)
581 short req_flags = ifr->ifr_flags;
582 int remote = pmd->remote_if_index &&
583 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
585 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
588 * If there is a remote netdevice, apply ioctl on it, then apply it on
593 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
594 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
595 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
598 /* fetch current flags to leave other flags untouched */
599 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
602 ifr->ifr_flags |= req_flags;
604 ifr->ifr_flags &= ~req_flags;
612 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
616 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
618 if (remote-- && mode == LOCAL_AND_REMOTE)
623 TAP_LOG(DEBUG, "%s(%s) failed: %s(%d)", ifr->ifr_name,
624 tap_ioctl_req2str(request), strerror(errno), errno);
629 tap_link_set_down(struct rte_eth_dev *dev)
631 struct pmd_internals *pmd = dev->data->dev_private;
632 struct ifreq ifr = { .ifr_flags = IFF_UP };
634 dev->data->dev_link.link_status = ETH_LINK_DOWN;
635 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
639 tap_link_set_up(struct rte_eth_dev *dev)
641 struct pmd_internals *pmd = dev->data->dev_private;
642 struct ifreq ifr = { .ifr_flags = IFF_UP };
644 dev->data->dev_link.link_status = ETH_LINK_UP;
645 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
649 tap_dev_start(struct rte_eth_dev *dev)
653 err = tap_intr_handle_set(dev, 1);
656 return tap_link_set_up(dev);
659 /* This function gets called when the current port gets stopped.
662 tap_dev_stop(struct rte_eth_dev *dev)
664 tap_intr_handle_set(dev, 0);
665 tap_link_set_down(dev);
669 tap_dev_configure(struct rte_eth_dev *dev)
671 uint64_t supp_tx_offloads = tap_tx_offload_get_port_capa() |
672 tap_tx_offload_get_queue_capa();
673 uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
675 if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
678 "Some Tx offloads are not supported "
679 "requested 0x%" PRIx64 " supported 0x%" PRIx64,
680 tx_offloads, supp_tx_offloads);
683 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
685 "%s: number of rx queues %d exceeds max num of queues %d",
687 dev->data->nb_rx_queues,
688 RTE_PMD_TAP_MAX_QUEUES);
691 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
693 "%s: number of tx queues %d exceeds max num of queues %d",
695 dev->data->nb_tx_queues,
696 RTE_PMD_TAP_MAX_QUEUES);
700 TAP_LOG(INFO, "%s: %p: TX configured queues number: %u",
701 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
703 TAP_LOG(INFO, "%s: %p: RX configured queues number: %u",
704 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
710 tap_dev_speed_capa(void)
712 uint32_t speed = pmd_link.link_speed;
715 if (speed >= ETH_SPEED_NUM_10M)
716 capa |= ETH_LINK_SPEED_10M;
717 if (speed >= ETH_SPEED_NUM_100M)
718 capa |= ETH_LINK_SPEED_100M;
719 if (speed >= ETH_SPEED_NUM_1G)
720 capa |= ETH_LINK_SPEED_1G;
721 if (speed >= ETH_SPEED_NUM_5G)
722 capa |= ETH_LINK_SPEED_2_5G;
723 if (speed >= ETH_SPEED_NUM_5G)
724 capa |= ETH_LINK_SPEED_5G;
725 if (speed >= ETH_SPEED_NUM_10G)
726 capa |= ETH_LINK_SPEED_10G;
727 if (speed >= ETH_SPEED_NUM_20G)
728 capa |= ETH_LINK_SPEED_20G;
729 if (speed >= ETH_SPEED_NUM_25G)
730 capa |= ETH_LINK_SPEED_25G;
731 if (speed >= ETH_SPEED_NUM_40G)
732 capa |= ETH_LINK_SPEED_40G;
733 if (speed >= ETH_SPEED_NUM_50G)
734 capa |= ETH_LINK_SPEED_50G;
735 if (speed >= ETH_SPEED_NUM_56G)
736 capa |= ETH_LINK_SPEED_56G;
737 if (speed >= ETH_SPEED_NUM_100G)
738 capa |= ETH_LINK_SPEED_100G;
744 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
746 struct pmd_internals *internals = dev->data->dev_private;
748 dev_info->if_index = internals->if_index;
749 dev_info->max_mac_addrs = 1;
750 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
751 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
752 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
753 dev_info->min_rx_bufsize = 0;
754 dev_info->speed_capa = tap_dev_speed_capa();
755 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
756 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
757 dev_info->rx_queue_offload_capa;
758 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
759 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
760 dev_info->tx_queue_offload_capa;
764 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
766 unsigned int i, imax;
767 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
768 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
769 unsigned long rx_nombuf = 0, ierrors = 0;
770 const struct pmd_internals *pmd = dev->data->dev_private;
772 /* rx queue statistics */
773 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
774 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
775 for (i = 0; i < imax; i++) {
776 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
777 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
778 rx_total += tap_stats->q_ipackets[i];
779 rx_bytes_total += tap_stats->q_ibytes[i];
780 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
781 ierrors += pmd->rxq[i].stats.ierrors;
784 /* tx queue statistics */
785 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
786 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
788 for (i = 0; i < imax; i++) {
789 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
790 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
791 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
792 tx_total += tap_stats->q_opackets[i];
793 tx_err_total += tap_stats->q_errors[i];
794 tx_bytes_total += tap_stats->q_obytes[i];
797 tap_stats->ipackets = rx_total;
798 tap_stats->ibytes = rx_bytes_total;
799 tap_stats->ierrors = ierrors;
800 tap_stats->rx_nombuf = rx_nombuf;
801 tap_stats->opackets = tx_total;
802 tap_stats->oerrors = tx_err_total;
803 tap_stats->obytes = tx_bytes_total;
808 tap_stats_reset(struct rte_eth_dev *dev)
811 struct pmd_internals *pmd = dev->data->dev_private;
813 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
814 pmd->rxq[i].stats.ipackets = 0;
815 pmd->rxq[i].stats.ibytes = 0;
816 pmd->rxq[i].stats.ierrors = 0;
817 pmd->rxq[i].stats.rx_nombuf = 0;
819 pmd->txq[i].stats.opackets = 0;
820 pmd->txq[i].stats.errs = 0;
821 pmd->txq[i].stats.obytes = 0;
826 tap_dev_close(struct rte_eth_dev *dev)
829 struct pmd_internals *internals = dev->data->dev_private;
831 tap_link_set_down(dev);
832 tap_flow_flush(dev, NULL);
833 tap_flow_implicit_flush(internals, NULL);
835 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
836 if (internals->rxq[i].fd != -1) {
837 close(internals->rxq[i].fd);
838 internals->rxq[i].fd = -1;
840 if (internals->txq[i].fd != -1) {
841 close(internals->txq[i].fd);
842 internals->txq[i].fd = -1;
846 if (internals->remote_if_index) {
847 /* Restore initial remote state */
848 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
849 &internals->remote_initial_flags);
854 tap_rx_queue_release(void *queue)
856 struct rx_queue *rxq = queue;
858 if (rxq && (rxq->fd > 0)) {
861 rte_pktmbuf_free(rxq->pool);
862 rte_free(rxq->iovecs);
869 tap_tx_queue_release(void *queue)
871 struct tx_queue *txq = queue;
873 if (txq && (txq->fd > 0)) {
880 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
882 struct rte_eth_link *dev_link = &dev->data->dev_link;
883 struct pmd_internals *pmd = dev->data->dev_private;
884 struct ifreq ifr = { .ifr_flags = 0 };
886 if (pmd->remote_if_index) {
887 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
888 if (!(ifr.ifr_flags & IFF_UP) ||
889 !(ifr.ifr_flags & IFF_RUNNING)) {
890 dev_link->link_status = ETH_LINK_DOWN;
894 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
895 dev_link->link_status =
896 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
903 tap_promisc_enable(struct rte_eth_dev *dev)
905 struct pmd_internals *pmd = dev->data->dev_private;
906 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
908 dev->data->promiscuous = 1;
909 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
910 if (pmd->remote_if_index && !pmd->flow_isolate)
911 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
915 tap_promisc_disable(struct rte_eth_dev *dev)
917 struct pmd_internals *pmd = dev->data->dev_private;
918 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
920 dev->data->promiscuous = 0;
921 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
922 if (pmd->remote_if_index && !pmd->flow_isolate)
923 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
927 tap_allmulti_enable(struct rte_eth_dev *dev)
929 struct pmd_internals *pmd = dev->data->dev_private;
930 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
932 dev->data->all_multicast = 1;
933 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
934 if (pmd->remote_if_index && !pmd->flow_isolate)
935 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
939 tap_allmulti_disable(struct rte_eth_dev *dev)
941 struct pmd_internals *pmd = dev->data->dev_private;
942 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
944 dev->data->all_multicast = 0;
945 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
946 if (pmd->remote_if_index && !pmd->flow_isolate)
947 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
951 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
953 struct pmd_internals *pmd = dev->data->dev_private;
954 enum ioctl_mode mode = LOCAL_ONLY;
958 if (is_zero_ether_addr(mac_addr)) {
959 TAP_LOG(ERR, "%s: can't set an empty MAC address",
963 /* Check the actual current MAC address on the tap netdevice */
964 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
967 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
970 /* Check the current MAC address on the remote */
971 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
974 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
976 mode = LOCAL_AND_REMOTE;
977 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
978 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
979 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
982 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
983 if (pmd->remote_if_index && !pmd->flow_isolate) {
984 /* Replace MAC redirection rule after a MAC change */
985 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
988 "%s: Couldn't delete MAC redirection rule",
992 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
995 "%s: Couldn't add MAC redirection rule",
1005 tap_setup_queue(struct rte_eth_dev *dev,
1006 struct pmd_internals *internals,
1013 struct pmd_internals *pmd = dev->data->dev_private;
1014 struct rx_queue *rx = &internals->rxq[qid];
1015 struct tx_queue *tx = &internals->txq[qid];
1027 /* fd for this queue already exists */
1028 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1029 pmd->name, *fd, dir, qid);
1030 } else if (*other_fd != -1) {
1031 /* Only other_fd exists. dup it */
1032 *fd = dup(*other_fd);
1035 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1038 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1039 pmd->name, *other_fd, dir, qid, *fd);
1041 /* Both RX and TX fds do not exist (equal -1). Create fd */
1042 *fd = tun_alloc(pmd);
1044 *fd = -1; /* restore original value */
1045 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1048 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1049 pmd->name, dir, qid, *fd);
1052 tx->mtu = &dev->data->mtu;
1053 rx->rxmode = &dev->data->dev_conf.rxmode;
1059 tap_rx_queue_setup(struct rte_eth_dev *dev,
1060 uint16_t rx_queue_id,
1061 uint16_t nb_rx_desc,
1062 unsigned int socket_id,
1063 const struct rte_eth_rxconf *rx_conf __rte_unused,
1064 struct rte_mempool *mp)
1066 struct pmd_internals *internals = dev->data->dev_private;
1067 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1068 struct rte_mbuf **tmp = &rxq->pool;
1069 long iov_max = sysconf(_SC_IOV_MAX);
1070 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1071 struct iovec (*iovecs)[nb_desc + 1];
1072 int data_off = RTE_PKTMBUF_HEADROOM;
1077 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1079 "nb_rx_queues %d too small or mempool NULL",
1080 dev->data->nb_rx_queues);
1084 /* Verify application offloads are valid for our port and queue. */
1085 if (!tap_rxq_are_offloads_valid(dev, rx_conf->offloads)) {
1086 rte_errno = ENOTSUP;
1088 "%p: Rx queue offloads 0x%" PRIx64
1089 " don't match port offloads 0x%" PRIx64
1090 " or supported offloads 0x%" PRIx64,
1091 (void *)dev, rx_conf->offloads,
1092 dev->data->dev_conf.rxmode.offloads,
1093 (tap_rx_offload_get_port_capa() |
1094 tap_rx_offload_get_queue_capa()));
1098 rxq->trigger_seen = 1; /* force initial burst */
1099 rxq->in_port = dev->data->port_id;
1100 rxq->nb_rx_desc = nb_desc;
1101 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1105 "%s: Couldn't allocate %d RX descriptors",
1106 dev->device->name, nb_desc);
1109 rxq->iovecs = iovecs;
1111 dev->data->rx_queues[rx_queue_id] = rxq;
1112 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1118 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1119 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1121 for (i = 1; i <= nb_desc; i++) {
1122 *tmp = rte_pktmbuf_alloc(rxq->mp);
1125 "%s: couldn't allocate memory for queue %d",
1126 dev->device->name, rx_queue_id);
1130 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1131 (*rxq->iovecs)[i].iov_base =
1132 (char *)(*tmp)->buf_addr + data_off;
1134 tmp = &(*tmp)->next;
1137 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1138 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
1143 rte_pktmbuf_free(rxq->pool);
1145 rte_free(rxq->iovecs);
1151 tap_tx_queue_setup(struct rte_eth_dev *dev,
1152 uint16_t tx_queue_id,
1153 uint16_t nb_tx_desc __rte_unused,
1154 unsigned int socket_id __rte_unused,
1155 const struct rte_eth_txconf *tx_conf)
1157 struct pmd_internals *internals = dev->data->dev_private;
1158 struct tx_queue *txq;
1161 if (tx_queue_id >= dev->data->nb_tx_queues)
1163 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1164 txq = dev->data->tx_queues[tx_queue_id];
1166 * Don't verify port offloads for application which
1169 if (tx_conf != NULL &&
1170 !!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)) {
1171 if (tap_txq_are_offloads_valid(dev, tx_conf->offloads)) {
1172 txq->csum = !!(tx_conf->offloads &
1173 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1174 DEV_TX_OFFLOAD_UDP_CKSUM |
1175 DEV_TX_OFFLOAD_TCP_CKSUM));
1177 rte_errno = ENOTSUP;
1179 "%p: Tx queue offloads 0x%" PRIx64
1180 " don't match port offloads 0x%" PRIx64
1181 " or supported offloads 0x%" PRIx64,
1182 (void *)dev, tx_conf->offloads,
1183 dev->data->dev_conf.txmode.offloads,
1184 (tap_tx_offload_get_port_capa() |
1185 tap_tx_offload_get_queue_capa()));
1189 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1193 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1194 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd,
1195 txq->csum ? "on" : "off");
1201 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1203 struct pmd_internals *pmd = dev->data->dev_private;
1204 struct ifreq ifr = { .ifr_mtu = mtu };
1207 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1209 dev->data->mtu = mtu;
1215 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1216 struct ether_addr *mc_addr_set __rte_unused,
1217 uint32_t nb_mc_addr __rte_unused)
1220 * Nothing to do actually: the tap has no filtering whatsoever, every
1221 * packet is received.
1227 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1229 struct rte_eth_dev *dev = arg;
1230 struct pmd_internals *pmd = dev->data->dev_private;
1231 struct ifinfomsg *info = NLMSG_DATA(nh);
1233 if (nh->nlmsg_type != RTM_NEWLINK ||
1234 (info->ifi_index != pmd->if_index &&
1235 info->ifi_index != pmd->remote_if_index))
1237 return tap_link_update(dev, 0);
1241 tap_dev_intr_handler(void *cb_arg)
1243 struct rte_eth_dev *dev = cb_arg;
1244 struct pmd_internals *pmd = dev->data->dev_private;
1246 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1250 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1252 struct pmd_internals *pmd = dev->data->dev_private;
1254 /* In any case, disable interrupt if the conf is no longer there. */
1255 if (!dev->data->dev_conf.intr_conf.lsc) {
1256 if (pmd->intr_handle.fd != -1) {
1257 tap_nl_final(pmd->intr_handle.fd);
1258 rte_intr_callback_unregister(&pmd->intr_handle,
1259 tap_dev_intr_handler, dev);
1264 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1265 if (unlikely(pmd->intr_handle.fd == -1))
1267 return rte_intr_callback_register(
1268 &pmd->intr_handle, tap_dev_intr_handler, dev);
1270 tap_nl_final(pmd->intr_handle.fd);
1271 return rte_intr_callback_unregister(&pmd->intr_handle,
1272 tap_dev_intr_handler, dev);
1276 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1280 err = tap_lsc_intr_handle_set(dev, set);
1283 err = tap_rx_intr_vec_set(dev, set);
1285 tap_lsc_intr_handle_set(dev, 0);
1289 static const uint32_t*
1290 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1292 static const uint32_t ptypes[] = {
1293 RTE_PTYPE_INNER_L2_ETHER,
1294 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1295 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1296 RTE_PTYPE_INNER_L3_IPV4,
1297 RTE_PTYPE_INNER_L3_IPV4_EXT,
1298 RTE_PTYPE_INNER_L3_IPV6,
1299 RTE_PTYPE_INNER_L3_IPV6_EXT,
1300 RTE_PTYPE_INNER_L4_FRAG,
1301 RTE_PTYPE_INNER_L4_UDP,
1302 RTE_PTYPE_INNER_L4_TCP,
1303 RTE_PTYPE_INNER_L4_SCTP,
1305 RTE_PTYPE_L2_ETHER_VLAN,
1306 RTE_PTYPE_L2_ETHER_QINQ,
1308 RTE_PTYPE_L3_IPV4_EXT,
1309 RTE_PTYPE_L3_IPV6_EXT,
1321 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1322 struct rte_eth_fc_conf *fc_conf)
1324 fc_conf->mode = RTE_FC_NONE;
1329 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1330 struct rte_eth_fc_conf *fc_conf)
1332 if (fc_conf->mode != RTE_FC_NONE)
1337 static const struct eth_dev_ops ops = {
1338 .dev_start = tap_dev_start,
1339 .dev_stop = tap_dev_stop,
1340 .dev_close = tap_dev_close,
1341 .dev_configure = tap_dev_configure,
1342 .dev_infos_get = tap_dev_info,
1343 .rx_queue_setup = tap_rx_queue_setup,
1344 .tx_queue_setup = tap_tx_queue_setup,
1345 .rx_queue_release = tap_rx_queue_release,
1346 .tx_queue_release = tap_tx_queue_release,
1347 .flow_ctrl_get = tap_flow_ctrl_get,
1348 .flow_ctrl_set = tap_flow_ctrl_set,
1349 .link_update = tap_link_update,
1350 .dev_set_link_up = tap_link_set_up,
1351 .dev_set_link_down = tap_link_set_down,
1352 .promiscuous_enable = tap_promisc_enable,
1353 .promiscuous_disable = tap_promisc_disable,
1354 .allmulticast_enable = tap_allmulti_enable,
1355 .allmulticast_disable = tap_allmulti_disable,
1356 .mac_addr_set = tap_mac_set,
1357 .mtu_set = tap_mtu_set,
1358 .set_mc_addr_list = tap_set_mc_addr_list,
1359 .stats_get = tap_stats_get,
1360 .stats_reset = tap_stats_reset,
1361 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1362 .filter_ctrl = tap_dev_filter_ctrl,
1366 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1367 char *remote_iface, struct ether_addr *mac_addr)
1369 int numa_node = rte_socket_id();
1370 struct rte_eth_dev *dev;
1371 struct pmd_internals *pmd;
1372 struct rte_eth_dev_data *data;
1376 TAP_LOG(DEBUG, "%s device on numa %u",
1377 tuntap_name, rte_socket_id());
1379 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1381 TAP_LOG(ERR, "%s Unable to allocate device struct",
1383 goto error_exit_nodev;
1386 pmd = dev->data->dev_private;
1388 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1390 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1391 if (pmd->ioctl_sock == -1) {
1393 "%s Unable to get a socket for management: %s",
1394 tuntap_name, strerror(errno));
1398 /* Setup some default values */
1400 data->dev_private = pmd;
1401 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1402 data->numa_node = numa_node;
1404 data->dev_link = pmd_link;
1405 data->mac_addrs = &pmd->eth_addr;
1406 /* Set the number of RX and TX queues */
1407 data->nb_rx_queues = 0;
1408 data->nb_tx_queues = 0;
1410 dev->dev_ops = &ops;
1411 dev->rx_pkt_burst = pmd_rx_burst;
1412 dev->tx_pkt_burst = pmd_tx_burst;
1414 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1415 pmd->intr_handle.fd = -1;
1416 dev->intr_handle = &pmd->intr_handle;
1418 /* Presetup the fds to -1 as being not valid */
1419 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1420 pmd->rxq[i].fd = -1;
1421 pmd->txq[i].fd = -1;
1425 if (is_zero_ether_addr(mac_addr))
1426 eth_random_addr((uint8_t *)&pmd->eth_addr);
1428 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1431 /* Immediately create the netdevice (this will create the 1st queue). */
1433 if (tap_setup_queue(dev, pmd, 0, 1) == -1)
1436 if (tap_setup_queue(dev, pmd, 0, 0) == -1)
1439 ifr.ifr_mtu = dev->data->mtu;
1440 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1444 memset(&ifr, 0, sizeof(struct ifreq));
1445 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1446 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1448 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1453 * Set up everything related to rte_flow:
1455 * - tap / remote if_index
1456 * - mandatory QDISCs
1457 * - rte_flow actual/implicit lists
1460 pmd->nlsk_fd = tap_nl_init(0);
1461 if (pmd->nlsk_fd == -1) {
1462 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
1464 goto disable_rte_flow;
1466 pmd->if_index = if_nametoindex(pmd->name);
1467 if (!pmd->if_index) {
1468 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
1469 goto disable_rte_flow;
1471 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1472 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
1474 goto disable_rte_flow;
1476 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1477 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1479 goto disable_rte_flow;
1481 LIST_INIT(&pmd->flows);
1483 if (strlen(remote_iface)) {
1484 pmd->remote_if_index = if_nametoindex(remote_iface);
1485 if (!pmd->remote_if_index) {
1486 TAP_LOG(ERR, "%s: failed to get %s if_index.",
1487 pmd->name, remote_iface);
1490 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1491 "%s", remote_iface);
1493 /* Save state of remote device */
1494 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1496 /* Replicate remote MAC address */
1497 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1498 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1499 pmd->name, pmd->remote_iface);
1502 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1504 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1505 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1506 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1507 pmd->name, remote_iface);
1512 * Flush usually returns negative value because it tries to
1513 * delete every QDISC (and on a running device, one QDISC at
1514 * least is needed). Ignore negative return value.
1516 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1517 if (qdisc_create_ingress(pmd->nlsk_fd,
1518 pmd->remote_if_index) < 0) {
1519 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1523 LIST_INIT(&pmd->implicit_flows);
1524 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1525 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1526 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1527 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1529 "%s: failed to create implicit rules.",
1538 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
1539 strerror(errno), errno);
1540 if (strlen(remote_iface)) {
1541 TAP_LOG(ERR, "Remote feature requires flow support.");
1547 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
1548 strerror(errno), errno);
1549 tap_flow_implicit_flush(pmd, NULL);
1552 if (pmd->ioctl_sock > 0)
1553 close(pmd->ioctl_sock);
1554 rte_eth_dev_release_port(dev);
1557 TAP_LOG(ERR, "%s Unable to initialize %s",
1558 tuntap_name, rte_vdev_device_name(vdev));
1564 set_interface_name(const char *key __rte_unused,
1568 char *name = (char *)extra_args;
1571 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN - 1);
1573 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
1574 DEFAULT_TAP_NAME, (tap_unit - 1));
1580 set_remote_iface(const char *key __rte_unused,
1584 char *name = (char *)extra_args;
1587 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1592 static int parse_user_mac(struct ether_addr *user_mac,
1595 unsigned int index = 0;
1596 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
1598 if (user_mac == NULL || value == NULL)
1601 strlcpy(mac_temp, value, sizeof(mac_temp));
1602 mac_byte = strtok(mac_temp, ":");
1604 while ((mac_byte != NULL) &&
1605 (strlen(mac_byte) <= 2) &&
1606 (strlen(mac_byte) == strspn(mac_byte,
1607 ETH_TAP_CMP_MAC_FMT))) {
1608 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
1609 mac_byte = strtok(NULL, ":");
1616 set_mac_type(const char *key __rte_unused,
1620 struct ether_addr *user_mac = extra_args;
1625 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
1626 static int iface_idx;
1628 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1629 memcpy((char *)user_mac->addr_bytes, "\0dtap", ETHER_ADDR_LEN);
1630 user_mac->addr_bytes[ETHER_ADDR_LEN - 1] = iface_idx++ + '0';
1634 if (parse_user_mac(user_mac, value) != 6)
1637 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
1641 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
1642 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
1647 * Open a TUN interface device. TUN PMD
1648 * 1) sets tap_type as false
1649 * 2) intakes iface as argument.
1650 * 3) as interface is virtual set speed to 10G
1653 rte_pmd_tun_probe(struct rte_vdev_device *dev)
1655 const char *name, *params;
1657 struct rte_kvargs *kvlist = NULL;
1658 char tun_name[RTE_ETH_NAME_MAX_LEN];
1659 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1662 strcpy(tuntap_name, "TUN");
1664 name = rte_vdev_device_name(dev);
1665 params = rte_vdev_device_args(dev);
1666 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1668 if (params && (params[0] != '\0')) {
1669 TAP_LOG(DEBUG, "parameters (%s)", params);
1671 kvlist = rte_kvargs_parse(params, valid_arguments);
1673 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1674 ret = rte_kvargs_process(kvlist,
1676 &set_interface_name,
1684 pmd_link.link_speed = ETH_SPEED_NUM_10G;
1686 TAP_LOG(NOTICE, "Initializing pmd_tun for %s as %s",
1689 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0);
1693 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
1695 tun_unit--; /* Restore the unit number */
1697 rte_kvargs_free(kvlist);
1702 /* Open a TAP interface device.
1705 rte_pmd_tap_probe(struct rte_vdev_device *dev)
1707 const char *name, *params;
1709 struct rte_kvargs *kvlist = NULL;
1711 char tap_name[RTE_ETH_NAME_MAX_LEN];
1712 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1713 struct ether_addr user_mac = { .addr_bytes = {0} };
1714 struct rte_eth_dev *eth_dev;
1717 strcpy(tuntap_name, "TAP");
1719 name = rte_vdev_device_name(dev);
1720 params = rte_vdev_device_args(dev);
1722 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1723 strlen(params) == 0) {
1724 eth_dev = rte_eth_dev_attach_secondary(name);
1726 TAP_LOG(ERR, "Failed to probe %s", name);
1729 /* TODO: request info from primary to set up Rx and Tx */
1730 eth_dev->dev_ops = &ops;
1734 speed = ETH_SPEED_NUM_10G;
1735 snprintf(tap_name, sizeof(tap_name), "%s%d",
1736 DEFAULT_TAP_NAME, tap_unit++);
1737 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1739 if (params && (params[0] != '\0')) {
1740 TAP_LOG(DEBUG, "parameters (%s)", params);
1742 kvlist = rte_kvargs_parse(params, valid_arguments);
1744 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1745 ret = rte_kvargs_process(kvlist,
1747 &set_interface_name,
1753 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
1754 ret = rte_kvargs_process(kvlist,
1762 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
1763 ret = rte_kvargs_process(kvlist,
1772 pmd_link.link_speed = speed;
1774 TAP_LOG(NOTICE, "Initializing pmd_tap for %s as %s",
1777 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac);
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 TAP_LOG(DEBUG, "Closing TUN/TAP Ethernet device on numa %u",
1802 /* find the ethdev entry */
1803 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1807 internals = eth_dev->data->dev_private;
1808 if (internals->nlsk_fd) {
1809 tap_flow_flush(eth_dev, NULL);
1810 tap_flow_implicit_flush(internals, NULL);
1811 tap_nl_final(internals->nlsk_fd);
1813 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1814 if (internals->rxq[i].fd != -1) {
1815 close(internals->rxq[i].fd);
1816 internals->rxq[i].fd = -1;
1818 if (internals->txq[i].fd != -1) {
1819 close(internals->txq[i].fd);
1820 internals->txq[i].fd = -1;
1824 close(internals->ioctl_sock);
1825 rte_free(eth_dev->data->dev_private);
1827 rte_eth_dev_release_port(eth_dev);
1832 static struct rte_vdev_driver pmd_tun_drv = {
1833 .probe = rte_pmd_tun_probe,
1834 .remove = rte_pmd_tap_remove,
1837 static struct rte_vdev_driver pmd_tap_drv = {
1838 .probe = rte_pmd_tap_probe,
1839 .remove = rte_pmd_tap_remove,
1842 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1843 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
1844 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1845 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
1846 ETH_TAP_IFACE_ARG "=<string> ");
1847 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
1848 ETH_TAP_IFACE_ARG "=<string> "
1849 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
1850 ETH_TAP_REMOTE_ARG "=<string>");
1853 RTE_INIT(tap_init_log);
1857 tap_logtype = rte_log_register("pmd.net.tap");
1858 if (tap_logtype >= 0)
1859 rte_log_set_level(tap_logtype, RTE_LOG_NOTICE);