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_AUTONEG
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 * In order to support legacy apps,
272 * report capabilities also as port capabilities.
274 return DEV_RX_OFFLOAD_SCATTER |
275 DEV_RX_OFFLOAD_IPV4_CKSUM |
276 DEV_RX_OFFLOAD_UDP_CKSUM |
277 DEV_RX_OFFLOAD_TCP_CKSUM |
278 DEV_RX_OFFLOAD_CRC_STRIP;
282 tap_rx_offload_get_queue_capa(void)
284 return DEV_RX_OFFLOAD_SCATTER |
285 DEV_RX_OFFLOAD_IPV4_CKSUM |
286 DEV_RX_OFFLOAD_UDP_CKSUM |
287 DEV_RX_OFFLOAD_TCP_CKSUM |
288 DEV_RX_OFFLOAD_CRC_STRIP;
292 tap_rxq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
294 uint64_t port_offloads = dev->data->dev_conf.rxmode.offloads;
295 uint64_t queue_supp_offloads = tap_rx_offload_get_queue_capa();
296 uint64_t port_supp_offloads = tap_rx_offload_get_port_capa();
298 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
301 if ((port_offloads ^ offloads) & port_supp_offloads)
306 /* Callback to handle the rx burst of packets to the correct interface and
307 * file descriptor(s) in a multi-queue setup.
310 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
312 struct rx_queue *rxq = queue;
314 unsigned long num_rx_bytes = 0;
315 uint32_t trigger = tap_trigger;
317 if (trigger == rxq->trigger_seen)
320 rxq->trigger_seen = trigger;
321 rte_compiler_barrier();
322 for (num_rx = 0; num_rx < nb_pkts; ) {
323 struct rte_mbuf *mbuf = rxq->pool;
324 struct rte_mbuf *seg = NULL;
325 struct rte_mbuf *new_tail = NULL;
326 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
329 len = readv(rxq->fd, *rxq->iovecs,
331 (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
332 rxq->nb_rx_desc : 1));
333 if (len < (int)sizeof(struct tun_pi))
336 /* Packet couldn't fit in the provided mbuf */
337 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
338 rxq->stats.ierrors++;
342 len -= sizeof(struct tun_pi);
345 mbuf->port = rxq->in_port;
347 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
349 if (unlikely(!buf)) {
350 rxq->stats.rx_nombuf++;
351 /* No new buf has been allocated: do nothing */
352 if (!new_tail || !seg)
356 rte_pktmbuf_free(mbuf);
360 seg = seg ? seg->next : mbuf;
361 if (rxq->pool == mbuf)
364 new_tail->next = buf;
366 new_tail->next = seg->next;
368 /* iovecs[0] is reserved for packet info (pi) */
369 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
370 buf->buf_len - data_off;
371 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
372 (char *)buf->buf_addr + data_off;
374 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
375 seg->data_off = data_off;
377 len -= seg->data_len;
381 /* First segment has headroom, not the others */
385 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
387 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
388 tap_verify_csum(mbuf);
390 /* account for the receive frame */
391 bufs[num_rx++] = mbuf;
392 num_rx_bytes += mbuf->pkt_len;
395 rxq->stats.ipackets += num_rx;
396 rxq->stats.ibytes += num_rx_bytes;
402 tap_tx_offload_get_port_capa(void)
405 * In order to support legacy apps,
406 * report capabilities also as port capabilities.
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_tx_offload_get_queue_capa(void)
417 return DEV_TX_OFFLOAD_MULTI_SEGS |
418 DEV_TX_OFFLOAD_IPV4_CKSUM |
419 DEV_TX_OFFLOAD_UDP_CKSUM |
420 DEV_TX_OFFLOAD_TCP_CKSUM;
424 tap_txq_are_offloads_valid(struct rte_eth_dev *dev, uint64_t offloads)
426 uint64_t port_offloads = dev->data->dev_conf.txmode.offloads;
427 uint64_t queue_supp_offloads = tap_tx_offload_get_queue_capa();
428 uint64_t port_supp_offloads = tap_tx_offload_get_port_capa();
430 if ((offloads & (queue_supp_offloads | port_supp_offloads)) !=
433 /* Verify we have no conflict with port offloads */
434 if ((port_offloads ^ offloads) & port_supp_offloads)
440 tap_tx_offload(char *packet, uint64_t ol_flags, unsigned int l2_len,
443 void *l3_hdr = packet + l2_len;
445 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
446 struct ipv4_hdr *iph = l3_hdr;
449 iph->hdr_checksum = 0;
450 cksum = rte_raw_cksum(iph, l3_len);
451 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
453 if (ol_flags & PKT_TX_L4_MASK) {
459 l4_hdr = packet + l2_len + l3_len;
460 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
461 l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
462 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
463 l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
467 if (ol_flags & PKT_TX_IPV4) {
468 struct ipv4_hdr *iph = l3_hdr;
470 l4_len = rte_be_to_cpu_16(iph->total_length) - l3_len;
471 cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
473 struct ipv6_hdr *ip6h = l3_hdr;
475 /* payload_len does not include ext headers */
476 l4_len = rte_be_to_cpu_16(ip6h->payload_len) -
477 l3_len + sizeof(struct ipv6_hdr);
478 cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
480 cksum += rte_raw_cksum(l4_hdr, l4_len);
481 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
482 cksum = (~cksum) & 0xffff;
489 /* Callback to handle sending packets from the tap interface
492 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
494 struct tx_queue *txq = queue;
496 unsigned long num_tx_bytes = 0;
500 if (unlikely(nb_pkts == 0))
503 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
504 for (i = 0; i < nb_pkts; i++) {
505 struct rte_mbuf *mbuf = bufs[num_tx];
506 struct iovec iovecs[mbuf->nb_segs + 1];
507 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
508 struct rte_mbuf *seg = mbuf;
509 char m_copy[mbuf->data_len];
513 /* stats.errs will be incremented */
514 if (rte_pktmbuf_pkt_len(mbuf) > max_size)
518 * TUN and TAP are created with IFF_NO_PI disabled.
519 * For TUN PMD this mandatory as fields are used by
520 * Kernel tun.c to determine whether its IP or non IP
523 * The logic fetches the first byte of data from mbuf.
524 * compares whether its v4 or v6. If none matches default
525 * value 0x00 is taken for protocol field.
527 char *buff_data = rte_pktmbuf_mtod(seg, void *);
528 j = (*buff_data & 0xf0);
529 pi.proto = (j == 0x40) ? 0x0008 :
530 (j == 0x60) ? 0xdd86 : 0x00;
532 iovecs[0].iov_base = π
533 iovecs[0].iov_len = sizeof(pi);
534 for (j = 1; j <= mbuf->nb_segs; j++) {
535 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
537 rte_pktmbuf_mtod(seg, void *);
541 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
542 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
543 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
544 /* Support only packets with all data in the same seg */
545 if (mbuf->nb_segs > 1)
547 /* To change checksums, work on a copy of data. */
548 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
549 rte_pktmbuf_data_len(mbuf));
550 tap_tx_offload(m_copy, mbuf->ol_flags,
551 mbuf->l2_len, mbuf->l3_len);
552 iovecs[1].iov_base = m_copy;
554 /* copy the tx frame data */
555 n = writev(txq->fd, iovecs, mbuf->nb_segs + 1);
560 num_tx_bytes += mbuf->pkt_len;
561 rte_pktmbuf_free(mbuf);
564 txq->stats.opackets += num_tx;
565 txq->stats.errs += nb_pkts - num_tx;
566 txq->stats.obytes += num_tx_bytes;
572 tap_ioctl_req2str(unsigned long request)
576 return "SIOCSIFFLAGS";
578 return "SIOCGIFFLAGS";
580 return "SIOCGIFHWADDR";
582 return "SIOCSIFHWADDR";
590 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
591 struct ifreq *ifr, int set, enum ioctl_mode mode)
593 short req_flags = ifr->ifr_flags;
594 int remote = pmd->remote_if_index &&
595 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
597 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
600 * If there is a remote netdevice, apply ioctl on it, then apply it on
605 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
606 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
607 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
610 /* fetch current flags to leave other flags untouched */
611 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
614 ifr->ifr_flags |= req_flags;
616 ifr->ifr_flags &= ~req_flags;
624 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
628 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
630 if (remote-- && mode == LOCAL_AND_REMOTE)
635 RTE_LOG(DEBUG, PMD, "%s: %s(%s) failed: %s(%d)\n", ifr->ifr_name,
636 __func__, tap_ioctl_req2str(request), strerror(errno), errno);
641 tap_link_set_down(struct rte_eth_dev *dev)
643 struct pmd_internals *pmd = dev->data->dev_private;
644 struct ifreq ifr = { .ifr_flags = IFF_UP };
646 dev->data->dev_link.link_status = ETH_LINK_DOWN;
647 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
651 tap_link_set_up(struct rte_eth_dev *dev)
653 struct pmd_internals *pmd = dev->data->dev_private;
654 struct ifreq ifr = { .ifr_flags = IFF_UP };
656 dev->data->dev_link.link_status = ETH_LINK_UP;
657 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
661 tap_dev_start(struct rte_eth_dev *dev)
665 err = tap_intr_handle_set(dev, 1);
668 return tap_link_set_up(dev);
671 /* This function gets called when the current port gets stopped.
674 tap_dev_stop(struct rte_eth_dev *dev)
676 tap_intr_handle_set(dev, 0);
677 tap_link_set_down(dev);
681 tap_dev_configure(struct rte_eth_dev *dev)
683 uint64_t supp_tx_offloads = tap_tx_offload_get_port_capa();
684 uint64_t tx_offloads = dev->data->dev_conf.txmode.offloads;
686 if ((tx_offloads & supp_tx_offloads) != tx_offloads) {
689 "Some Tx offloads are not supported "
690 "requested 0x%" PRIx64 " supported 0x%" PRIx64 "\n",
691 tx_offloads, supp_tx_offloads);
694 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
696 "%s: number of rx queues %d exceeds max num of queues %d\n",
698 dev->data->nb_rx_queues,
699 RTE_PMD_TAP_MAX_QUEUES);
702 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
704 "%s: number of tx queues %d exceeds max num of queues %d\n",
706 dev->data->nb_tx_queues,
707 RTE_PMD_TAP_MAX_QUEUES);
711 RTE_LOG(INFO, PMD, "%s: %p: TX configured queues number: %u\n",
712 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
714 RTE_LOG(INFO, PMD, "%s: %p: RX configured queues number: %u\n",
715 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
721 tap_dev_speed_capa(void)
723 uint32_t speed = pmd_link.link_speed;
726 if (speed >= ETH_SPEED_NUM_10M)
727 capa |= ETH_LINK_SPEED_10M;
728 if (speed >= ETH_SPEED_NUM_100M)
729 capa |= ETH_LINK_SPEED_100M;
730 if (speed >= ETH_SPEED_NUM_1G)
731 capa |= ETH_LINK_SPEED_1G;
732 if (speed >= ETH_SPEED_NUM_5G)
733 capa |= ETH_LINK_SPEED_2_5G;
734 if (speed >= ETH_SPEED_NUM_5G)
735 capa |= ETH_LINK_SPEED_5G;
736 if (speed >= ETH_SPEED_NUM_10G)
737 capa |= ETH_LINK_SPEED_10G;
738 if (speed >= ETH_SPEED_NUM_20G)
739 capa |= ETH_LINK_SPEED_20G;
740 if (speed >= ETH_SPEED_NUM_25G)
741 capa |= ETH_LINK_SPEED_25G;
742 if (speed >= ETH_SPEED_NUM_40G)
743 capa |= ETH_LINK_SPEED_40G;
744 if (speed >= ETH_SPEED_NUM_50G)
745 capa |= ETH_LINK_SPEED_50G;
746 if (speed >= ETH_SPEED_NUM_56G)
747 capa |= ETH_LINK_SPEED_56G;
748 if (speed >= ETH_SPEED_NUM_100G)
749 capa |= ETH_LINK_SPEED_100G;
755 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
757 struct pmd_internals *internals = dev->data->dev_private;
759 dev_info->if_index = internals->if_index;
760 dev_info->max_mac_addrs = 1;
761 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
762 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
763 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
764 dev_info->min_rx_bufsize = 0;
765 dev_info->speed_capa = tap_dev_speed_capa();
766 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
767 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
768 dev_info->rx_queue_offload_capa;
769 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
770 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
771 dev_info->tx_queue_offload_capa;
775 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
777 unsigned int i, imax;
778 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
779 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
780 unsigned long rx_nombuf = 0, ierrors = 0;
781 const struct pmd_internals *pmd = dev->data->dev_private;
783 /* rx queue statistics */
784 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
785 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
786 for (i = 0; i < imax; i++) {
787 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
788 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
789 rx_total += tap_stats->q_ipackets[i];
790 rx_bytes_total += tap_stats->q_ibytes[i];
791 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
792 ierrors += pmd->rxq[i].stats.ierrors;
795 /* tx queue statistics */
796 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
797 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
799 for (i = 0; i < imax; i++) {
800 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
801 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
802 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
803 tx_total += tap_stats->q_opackets[i];
804 tx_err_total += tap_stats->q_errors[i];
805 tx_bytes_total += tap_stats->q_obytes[i];
808 tap_stats->ipackets = rx_total;
809 tap_stats->ibytes = rx_bytes_total;
810 tap_stats->ierrors = ierrors;
811 tap_stats->rx_nombuf = rx_nombuf;
812 tap_stats->opackets = tx_total;
813 tap_stats->oerrors = tx_err_total;
814 tap_stats->obytes = tx_bytes_total;
819 tap_stats_reset(struct rte_eth_dev *dev)
822 struct pmd_internals *pmd = dev->data->dev_private;
824 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
825 pmd->rxq[i].stats.ipackets = 0;
826 pmd->rxq[i].stats.ibytes = 0;
827 pmd->rxq[i].stats.ierrors = 0;
828 pmd->rxq[i].stats.rx_nombuf = 0;
830 pmd->txq[i].stats.opackets = 0;
831 pmd->txq[i].stats.errs = 0;
832 pmd->txq[i].stats.obytes = 0;
837 tap_dev_close(struct rte_eth_dev *dev)
840 struct pmd_internals *internals = dev->data->dev_private;
842 tap_link_set_down(dev);
843 tap_flow_flush(dev, NULL);
844 tap_flow_implicit_flush(internals, NULL);
846 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
847 if (internals->rxq[i].fd != -1) {
848 close(internals->rxq[i].fd);
849 internals->rxq[i].fd = -1;
851 if (internals->txq[i].fd != -1) {
852 close(internals->txq[i].fd);
853 internals->txq[i].fd = -1;
857 if (internals->remote_if_index) {
858 /* Restore initial remote state */
859 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
860 &internals->remote_initial_flags);
865 tap_rx_queue_release(void *queue)
867 struct rx_queue *rxq = queue;
869 if (rxq && (rxq->fd > 0)) {
872 rte_pktmbuf_free(rxq->pool);
873 rte_free(rxq->iovecs);
880 tap_tx_queue_release(void *queue)
882 struct tx_queue *txq = queue;
884 if (txq && (txq->fd > 0)) {
891 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
893 struct rte_eth_link *dev_link = &dev->data->dev_link;
894 struct pmd_internals *pmd = dev->data->dev_private;
895 struct ifreq ifr = { .ifr_flags = 0 };
897 if (pmd->remote_if_index) {
898 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
899 if (!(ifr.ifr_flags & IFF_UP) ||
900 !(ifr.ifr_flags & IFF_RUNNING)) {
901 dev_link->link_status = ETH_LINK_DOWN;
905 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
906 dev_link->link_status =
907 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
914 tap_promisc_enable(struct rte_eth_dev *dev)
916 struct pmd_internals *pmd = dev->data->dev_private;
917 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
919 dev->data->promiscuous = 1;
920 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
921 if (pmd->remote_if_index && !pmd->flow_isolate)
922 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
926 tap_promisc_disable(struct rte_eth_dev *dev)
928 struct pmd_internals *pmd = dev->data->dev_private;
929 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
931 dev->data->promiscuous = 0;
932 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
933 if (pmd->remote_if_index && !pmd->flow_isolate)
934 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
938 tap_allmulti_enable(struct rte_eth_dev *dev)
940 struct pmd_internals *pmd = dev->data->dev_private;
941 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
943 dev->data->all_multicast = 1;
944 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
945 if (pmd->remote_if_index && !pmd->flow_isolate)
946 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
950 tap_allmulti_disable(struct rte_eth_dev *dev)
952 struct pmd_internals *pmd = dev->data->dev_private;
953 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
955 dev->data->all_multicast = 0;
956 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
957 if (pmd->remote_if_index && !pmd->flow_isolate)
958 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
962 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
964 struct pmd_internals *pmd = dev->data->dev_private;
965 enum ioctl_mode mode = LOCAL_ONLY;
969 if (is_zero_ether_addr(mac_addr)) {
970 RTE_LOG(ERR, PMD, "%s: can't set an empty MAC address\n",
974 /* Check the actual current MAC address on the tap netdevice */
975 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
978 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
981 /* Check the current MAC address on the remote */
982 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
985 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
987 mode = LOCAL_AND_REMOTE;
988 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
989 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
990 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
993 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
994 if (pmd->remote_if_index && !pmd->flow_isolate) {
995 /* Replace MAC redirection rule after a MAC change */
996 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
999 "%s: Couldn't delete MAC redirection rule\n",
1003 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
1006 "%s: Couldn't add MAC redirection rule\n",
1016 tap_setup_queue(struct rte_eth_dev *dev,
1017 struct pmd_internals *internals,
1024 struct pmd_internals *pmd = dev->data->dev_private;
1025 struct rx_queue *rx = &internals->rxq[qid];
1026 struct tx_queue *tx = &internals->txq[qid];
1038 /* fd for this queue already exists */
1039 RTE_LOG(DEBUG, PMD, "%s: fd %d for %s queue qid %d exists\n",
1040 pmd->name, *fd, dir, qid);
1041 } else if (*other_fd != -1) {
1042 /* Only other_fd exists. dup it */
1043 *fd = dup(*other_fd);
1046 RTE_LOG(ERR, PMD, "%s: dup() failed.\n",
1050 RTE_LOG(DEBUG, PMD, "%s: dup fd %d for %s queue qid %d (%d)\n",
1051 pmd->name, *other_fd, dir, qid, *fd);
1053 /* Both RX and TX fds do not exist (equal -1). Create fd */
1054 *fd = tun_alloc(pmd);
1056 *fd = -1; /* restore original value */
1057 RTE_LOG(ERR, PMD, "%s: tun_alloc() failed.\n",
1061 RTE_LOG(DEBUG, PMD, "%s: add %s queue for qid %d fd %d\n",
1062 pmd->name, dir, qid, *fd);
1065 tx->mtu = &dev->data->mtu;
1066 rx->rxmode = &dev->data->dev_conf.rxmode;
1072 tap_rx_queue_setup(struct rte_eth_dev *dev,
1073 uint16_t rx_queue_id,
1074 uint16_t nb_rx_desc,
1075 unsigned int socket_id,
1076 const struct rte_eth_rxconf *rx_conf __rte_unused,
1077 struct rte_mempool *mp)
1079 struct pmd_internals *internals = dev->data->dev_private;
1080 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1081 struct rte_mbuf **tmp = &rxq->pool;
1082 long iov_max = sysconf(_SC_IOV_MAX);
1083 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1084 struct iovec (*iovecs)[nb_desc + 1];
1085 int data_off = RTE_PKTMBUF_HEADROOM;
1090 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1091 RTE_LOG(WARNING, PMD,
1092 "nb_rx_queues %d too small or mempool NULL\n",
1093 dev->data->nb_rx_queues);
1097 /* Verify application offloads are valid for our port and queue. */
1098 if (!tap_rxq_are_offloads_valid(dev, rx_conf->offloads)) {
1099 rte_errno = ENOTSUP;
1101 "%p: Rx queue offloads 0x%" PRIx64
1102 " don't match port offloads 0x%" PRIx64
1103 " or supported offloads 0x%" PRIx64 "\n",
1104 (void *)dev, rx_conf->offloads,
1105 dev->data->dev_conf.rxmode.offloads,
1106 (tap_rx_offload_get_port_capa() |
1107 tap_rx_offload_get_queue_capa()));
1111 rxq->trigger_seen = 1; /* force initial burst */
1112 rxq->in_port = dev->data->port_id;
1113 rxq->nb_rx_desc = nb_desc;
1114 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1117 RTE_LOG(WARNING, PMD,
1118 "%s: Couldn't allocate %d RX descriptors\n",
1119 dev->device->name, nb_desc);
1122 rxq->iovecs = iovecs;
1124 dev->data->rx_queues[rx_queue_id] = rxq;
1125 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1131 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1132 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1134 for (i = 1; i <= nb_desc; i++) {
1135 *tmp = rte_pktmbuf_alloc(rxq->mp);
1137 RTE_LOG(WARNING, PMD,
1138 "%s: couldn't allocate memory for queue %d\n",
1139 dev->device->name, rx_queue_id);
1143 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1144 (*rxq->iovecs)[i].iov_base =
1145 (char *)(*tmp)->buf_addr + data_off;
1147 tmp = &(*tmp)->next;
1150 RTE_LOG(DEBUG, PMD, " RX TUNTAP device name %s, qid %d on fd %d\n",
1151 internals->name, rx_queue_id, internals->rxq[rx_queue_id].fd);
1156 rte_pktmbuf_free(rxq->pool);
1158 rte_free(rxq->iovecs);
1164 tap_tx_queue_setup(struct rte_eth_dev *dev,
1165 uint16_t tx_queue_id,
1166 uint16_t nb_tx_desc __rte_unused,
1167 unsigned int socket_id __rte_unused,
1168 const struct rte_eth_txconf *tx_conf)
1170 struct pmd_internals *internals = dev->data->dev_private;
1171 struct tx_queue *txq;
1174 if (tx_queue_id >= dev->data->nb_tx_queues)
1176 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1177 txq = dev->data->tx_queues[tx_queue_id];
1179 * Don't verify port offloads for application which
1182 if (tx_conf != NULL &&
1183 !!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)) {
1184 if (tap_txq_are_offloads_valid(dev, tx_conf->offloads)) {
1185 txq->csum = !!(tx_conf->offloads &
1186 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1187 DEV_TX_OFFLOAD_UDP_CKSUM |
1188 DEV_TX_OFFLOAD_TCP_CKSUM));
1190 rte_errno = ENOTSUP;
1192 "%p: Tx queue offloads 0x%" PRIx64
1193 " don't match port offloads 0x%" PRIx64
1194 " or supported offloads 0x%" PRIx64,
1195 (void *)dev, tx_conf->offloads,
1196 dev->data->dev_conf.txmode.offloads,
1197 tap_tx_offload_get_port_capa());
1201 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1205 " TX TUNTAP device name %s, qid %d on fd %d csum %s\n",
1206 internals->name, tx_queue_id, internals->txq[tx_queue_id].fd,
1207 txq->csum ? "on" : "off");
1213 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1215 struct pmd_internals *pmd = dev->data->dev_private;
1216 struct ifreq ifr = { .ifr_mtu = mtu };
1219 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1221 dev->data->mtu = mtu;
1227 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1228 struct ether_addr *mc_addr_set __rte_unused,
1229 uint32_t nb_mc_addr __rte_unused)
1232 * Nothing to do actually: the tap has no filtering whatsoever, every
1233 * packet is received.
1239 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1241 struct rte_eth_dev *dev = arg;
1242 struct pmd_internals *pmd = dev->data->dev_private;
1243 struct ifinfomsg *info = NLMSG_DATA(nh);
1245 if (nh->nlmsg_type != RTM_NEWLINK ||
1246 (info->ifi_index != pmd->if_index &&
1247 info->ifi_index != pmd->remote_if_index))
1249 return tap_link_update(dev, 0);
1253 tap_dev_intr_handler(void *cb_arg)
1255 struct rte_eth_dev *dev = cb_arg;
1256 struct pmd_internals *pmd = dev->data->dev_private;
1258 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1262 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1264 struct pmd_internals *pmd = dev->data->dev_private;
1266 /* In any case, disable interrupt if the conf is no longer there. */
1267 if (!dev->data->dev_conf.intr_conf.lsc) {
1268 if (pmd->intr_handle.fd != -1) {
1269 tap_nl_final(pmd->intr_handle.fd);
1270 rte_intr_callback_unregister(&pmd->intr_handle,
1271 tap_dev_intr_handler, dev);
1276 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1277 if (unlikely(pmd->intr_handle.fd == -1))
1279 return rte_intr_callback_register(
1280 &pmd->intr_handle, tap_dev_intr_handler, dev);
1282 tap_nl_final(pmd->intr_handle.fd);
1283 return rte_intr_callback_unregister(&pmd->intr_handle,
1284 tap_dev_intr_handler, dev);
1288 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1292 err = tap_lsc_intr_handle_set(dev, set);
1295 err = tap_rx_intr_vec_set(dev, set);
1297 tap_lsc_intr_handle_set(dev, 0);
1301 static const uint32_t*
1302 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1304 static const uint32_t ptypes[] = {
1305 RTE_PTYPE_INNER_L2_ETHER,
1306 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1307 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1308 RTE_PTYPE_INNER_L3_IPV4,
1309 RTE_PTYPE_INNER_L3_IPV4_EXT,
1310 RTE_PTYPE_INNER_L3_IPV6,
1311 RTE_PTYPE_INNER_L3_IPV6_EXT,
1312 RTE_PTYPE_INNER_L4_FRAG,
1313 RTE_PTYPE_INNER_L4_UDP,
1314 RTE_PTYPE_INNER_L4_TCP,
1315 RTE_PTYPE_INNER_L4_SCTP,
1317 RTE_PTYPE_L2_ETHER_VLAN,
1318 RTE_PTYPE_L2_ETHER_QINQ,
1320 RTE_PTYPE_L3_IPV4_EXT,
1321 RTE_PTYPE_L3_IPV6_EXT,
1333 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1334 struct rte_eth_fc_conf *fc_conf)
1336 fc_conf->mode = RTE_FC_NONE;
1341 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1342 struct rte_eth_fc_conf *fc_conf)
1344 if (fc_conf->mode != RTE_FC_NONE)
1349 static const struct eth_dev_ops ops = {
1350 .dev_start = tap_dev_start,
1351 .dev_stop = tap_dev_stop,
1352 .dev_close = tap_dev_close,
1353 .dev_configure = tap_dev_configure,
1354 .dev_infos_get = tap_dev_info,
1355 .rx_queue_setup = tap_rx_queue_setup,
1356 .tx_queue_setup = tap_tx_queue_setup,
1357 .rx_queue_release = tap_rx_queue_release,
1358 .tx_queue_release = tap_tx_queue_release,
1359 .flow_ctrl_get = tap_flow_ctrl_get,
1360 .flow_ctrl_set = tap_flow_ctrl_set,
1361 .link_update = tap_link_update,
1362 .dev_set_link_up = tap_link_set_up,
1363 .dev_set_link_down = tap_link_set_down,
1364 .promiscuous_enable = tap_promisc_enable,
1365 .promiscuous_disable = tap_promisc_disable,
1366 .allmulticast_enable = tap_allmulti_enable,
1367 .allmulticast_disable = tap_allmulti_disable,
1368 .mac_addr_set = tap_mac_set,
1369 .mtu_set = tap_mtu_set,
1370 .set_mc_addr_list = tap_set_mc_addr_list,
1371 .stats_get = tap_stats_get,
1372 .stats_reset = tap_stats_reset,
1373 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1374 .filter_ctrl = tap_dev_filter_ctrl,
1378 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1379 char *remote_iface, struct ether_addr *mac_addr)
1381 int numa_node = rte_socket_id();
1382 struct rte_eth_dev *dev;
1383 struct pmd_internals *pmd;
1384 struct rte_eth_dev_data *data;
1388 RTE_LOG(DEBUG, PMD, "%s device on numa %u\n",
1389 tuntap_name, rte_socket_id());
1391 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1393 RTE_LOG(ERR, PMD, "%s Unable to allocate device struct\n",
1395 goto error_exit_nodev;
1398 pmd = dev->data->dev_private;
1400 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1402 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1403 if (pmd->ioctl_sock == -1) {
1405 "%s Unable to get a socket for management: %s\n",
1406 tuntap_name, strerror(errno));
1410 /* Setup some default values */
1412 data->dev_private = pmd;
1413 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1414 data->numa_node = numa_node;
1416 data->dev_link = pmd_link;
1417 data->mac_addrs = &pmd->eth_addr;
1418 /* Set the number of RX and TX queues */
1419 data->nb_rx_queues = 0;
1420 data->nb_tx_queues = 0;
1422 dev->dev_ops = &ops;
1423 dev->rx_pkt_burst = pmd_rx_burst;
1424 dev->tx_pkt_burst = pmd_tx_burst;
1426 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1427 pmd->intr_handle.fd = -1;
1428 dev->intr_handle = &pmd->intr_handle;
1430 /* Presetup the fds to -1 as being not valid */
1431 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1432 pmd->rxq[i].fd = -1;
1433 pmd->txq[i].fd = -1;
1437 if (is_zero_ether_addr(mac_addr))
1438 eth_random_addr((uint8_t *)&pmd->eth_addr);
1440 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1443 /* Immediately create the netdevice (this will create the 1st queue). */
1445 if (tap_setup_queue(dev, pmd, 0, 1) == -1)
1448 if (tap_setup_queue(dev, pmd, 0, 0) == -1)
1451 ifr.ifr_mtu = dev->data->mtu;
1452 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1456 memset(&ifr, 0, sizeof(struct ifreq));
1457 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1458 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1460 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1465 * Set up everything related to rte_flow:
1467 * - tap / remote if_index
1468 * - mandatory QDISCs
1469 * - rte_flow actual/implicit lists
1472 pmd->nlsk_fd = tap_nl_init(0);
1473 if (pmd->nlsk_fd == -1) {
1474 RTE_LOG(WARNING, PMD, "%s: failed to create netlink socket.\n",
1476 goto disable_rte_flow;
1478 pmd->if_index = if_nametoindex(pmd->name);
1479 if (!pmd->if_index) {
1480 RTE_LOG(ERR, PMD, "%s: failed to get if_index.\n", pmd->name);
1481 goto disable_rte_flow;
1483 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1484 RTE_LOG(ERR, PMD, "%s: failed to create multiq qdisc.\n",
1486 goto disable_rte_flow;
1488 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1489 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1491 goto disable_rte_flow;
1493 LIST_INIT(&pmd->flows);
1495 if (strlen(remote_iface)) {
1496 pmd->remote_if_index = if_nametoindex(remote_iface);
1497 if (!pmd->remote_if_index) {
1498 RTE_LOG(ERR, PMD, "%s: failed to get %s if_index.\n",
1499 pmd->name, remote_iface);
1502 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1503 "%s", remote_iface);
1505 /* Save state of remote device */
1506 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1508 /* Replicate remote MAC address */
1509 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1510 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1511 pmd->name, pmd->remote_iface);
1514 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1516 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1517 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1518 RTE_LOG(ERR, PMD, "%s: failed to get %s MAC address.\n",
1519 pmd->name, remote_iface);
1524 * Flush usually returns negative value because it tries to
1525 * delete every QDISC (and on a running device, one QDISC at
1526 * least is needed). Ignore negative return value.
1528 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1529 if (qdisc_create_ingress(pmd->nlsk_fd,
1530 pmd->remote_if_index) < 0) {
1531 RTE_LOG(ERR, PMD, "%s: failed to create ingress qdisc.\n",
1535 LIST_INIT(&pmd->implicit_flows);
1536 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1537 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1538 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1539 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1541 "%s: failed to create implicit rules.\n",
1550 RTE_LOG(ERR, PMD, " Disabling rte flow support: %s(%d)\n",
1551 strerror(errno), errno);
1552 if (strlen(remote_iface)) {
1553 RTE_LOG(ERR, PMD, "Remote feature requires flow support.\n");
1559 RTE_LOG(ERR, PMD, " Can't set up remote feature: %s(%d)\n",
1560 strerror(errno), errno);
1561 tap_flow_implicit_flush(pmd, NULL);
1564 if (pmd->ioctl_sock > 0)
1565 close(pmd->ioctl_sock);
1566 rte_eth_dev_release_port(dev);
1569 RTE_LOG(ERR, PMD, "%s Unable to initialize %s\n",
1570 tuntap_name, rte_vdev_device_name(vdev));
1576 set_interface_name(const char *key __rte_unused,
1580 char *name = (char *)extra_args;
1583 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN - 1);
1585 snprintf(name, RTE_ETH_NAME_MAX_LEN - 1, "%s%d",
1586 DEFAULT_TAP_NAME, (tap_unit - 1));
1592 set_remote_iface(const char *key __rte_unused,
1596 char *name = (char *)extra_args;
1599 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1604 static int parse_user_mac(struct ether_addr *user_mac,
1607 unsigned int index = 0;
1608 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
1610 if (user_mac == NULL || value == NULL)
1613 strlcpy(mac_temp, value, sizeof(mac_temp));
1614 mac_byte = strtok(mac_temp, ":");
1616 while ((mac_byte != NULL) &&
1617 (strlen(mac_byte) <= 2) &&
1618 (strlen(mac_byte) == strspn(mac_byte,
1619 ETH_TAP_CMP_MAC_FMT))) {
1620 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
1621 mac_byte = strtok(NULL, ":");
1628 set_mac_type(const char *key __rte_unused,
1632 struct ether_addr *user_mac = extra_args;
1637 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
1638 static int iface_idx;
1640 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1641 memcpy((char *)user_mac->addr_bytes, "\0dtap", ETHER_ADDR_LEN);
1642 user_mac->addr_bytes[ETHER_ADDR_LEN - 1] = iface_idx++ + '0';
1646 if (parse_user_mac(user_mac, value) != 6)
1649 RTE_LOG(DEBUG, PMD, "TAP user MAC param (%s)\n", value);
1653 RTE_LOG(ERR, PMD, "TAP user MAC (%s) is not in format (%s|%s)\n",
1654 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
1659 * Open a TUN interface device. TUN PMD
1660 * 1) sets tap_type as false
1661 * 2) intakes iface as argument.
1662 * 3) as interface is virtual set speed to 10G
1665 rte_pmd_tun_probe(struct rte_vdev_device *dev)
1667 const char *name, *params;
1669 struct rte_kvargs *kvlist = NULL;
1670 char tun_name[RTE_ETH_NAME_MAX_LEN];
1671 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1674 strcpy(tuntap_name, "TUN");
1676 name = rte_vdev_device_name(dev);
1677 params = rte_vdev_device_args(dev);
1678 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1680 if (params && (params[0] != '\0')) {
1681 RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params);
1683 kvlist = rte_kvargs_parse(params, valid_arguments);
1685 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1686 ret = rte_kvargs_process(kvlist,
1688 &set_interface_name,
1696 pmd_link.link_speed = ETH_SPEED_NUM_10G;
1698 RTE_LOG(NOTICE, PMD, "Initializing pmd_tun for %s as %s\n",
1701 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0);
1705 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
1707 tun_unit--; /* Restore the unit number */
1709 rte_kvargs_free(kvlist);
1714 /* Open a TAP interface device.
1717 rte_pmd_tap_probe(struct rte_vdev_device *dev)
1719 const char *name, *params;
1721 struct rte_kvargs *kvlist = NULL;
1723 char tap_name[RTE_ETH_NAME_MAX_LEN];
1724 char remote_iface[RTE_ETH_NAME_MAX_LEN];
1725 struct ether_addr user_mac = { .addr_bytes = {0} };
1726 struct rte_eth_dev *eth_dev;
1729 strcpy(tuntap_name, "TAP");
1731 name = rte_vdev_device_name(dev);
1732 params = rte_vdev_device_args(dev);
1734 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
1735 strlen(params) == 0) {
1736 eth_dev = rte_eth_dev_attach_secondary(name);
1738 RTE_LOG(ERR, PMD, "Failed to probe %s\n", name);
1741 /* TODO: request info from primary to set up Rx and Tx */
1742 eth_dev->dev_ops = &ops;
1746 speed = ETH_SPEED_NUM_10G;
1747 snprintf(tap_name, sizeof(tap_name), "%s%d",
1748 DEFAULT_TAP_NAME, tap_unit++);
1749 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
1751 if (params && (params[0] != '\0')) {
1752 RTE_LOG(DEBUG, PMD, "parameters (%s)\n", params);
1754 kvlist = rte_kvargs_parse(params, valid_arguments);
1756 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
1757 ret = rte_kvargs_process(kvlist,
1759 &set_interface_name,
1765 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
1766 ret = rte_kvargs_process(kvlist,
1774 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
1775 ret = rte_kvargs_process(kvlist,
1784 pmd_link.link_speed = speed;
1786 RTE_LOG(NOTICE, PMD, "Initializing pmd_tap for %s as %s\n",
1789 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac);
1793 RTE_LOG(ERR, PMD, "Failed to create pmd for %s as %s\n",
1795 tap_unit--; /* Restore the unit number */
1797 rte_kvargs_free(kvlist);
1802 /* detach a TUNTAP device.
1805 rte_pmd_tap_remove(struct rte_vdev_device *dev)
1807 struct rte_eth_dev *eth_dev = NULL;
1808 struct pmd_internals *internals;
1811 RTE_LOG(DEBUG, PMD, "Closing TUN/TAP Ethernet device on numa %u\n",
1814 /* find the ethdev entry */
1815 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1819 internals = eth_dev->data->dev_private;
1820 if (internals->nlsk_fd) {
1821 tap_flow_flush(eth_dev, NULL);
1822 tap_flow_implicit_flush(internals, NULL);
1823 tap_nl_final(internals->nlsk_fd);
1825 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1826 if (internals->rxq[i].fd != -1) {
1827 close(internals->rxq[i].fd);
1828 internals->rxq[i].fd = -1;
1830 if (internals->txq[i].fd != -1) {
1831 close(internals->txq[i].fd);
1832 internals->txq[i].fd = -1;
1836 close(internals->ioctl_sock);
1837 rte_free(eth_dev->data->dev_private);
1839 rte_eth_dev_release_port(eth_dev);
1844 static struct rte_vdev_driver pmd_tun_drv = {
1845 .probe = rte_pmd_tun_probe,
1846 .remove = rte_pmd_tap_remove,
1849 static struct rte_vdev_driver pmd_tap_drv = {
1850 .probe = rte_pmd_tap_probe,
1851 .remove = rte_pmd_tap_remove,
1853 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
1854 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
1855 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
1856 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
1857 ETH_TAP_IFACE_ARG "=<string> ");
1858 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
1859 ETH_TAP_IFACE_ARG "=<string> "
1860 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
1861 ETH_TAP_REMOTE_ARG "=<string>");