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>
19 #include <rte_ethdev.h>
20 #include <rte_errno.h>
23 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <sys/ioctl.h>
27 #include <sys/utsname.h>
35 #include <arpa/inet.h>
37 #include <linux/if_tun.h>
38 #include <linux/if_ether.h>
43 #include <rte_eth_tap.h>
45 #include <tap_netlink.h>
46 #include <tap_tcmsgs.h>
48 /* Linux based path to the TUN device */
49 #define TUN_TAP_DEV_PATH "/dev/net/tun"
50 #define DEFAULT_TAP_NAME "dtap"
51 #define DEFAULT_TUN_NAME "dtun"
53 #define ETH_TAP_IFACE_ARG "iface"
54 #define ETH_TAP_REMOTE_ARG "remote"
55 #define ETH_TAP_MAC_ARG "mac"
56 #define ETH_TAP_MAC_FIXED "fixed"
58 #define ETH_TAP_USR_MAC_FMT "xx:xx:xx:xx:xx:xx"
59 #define ETH_TAP_CMP_MAC_FMT "0123456789ABCDEFabcdef"
60 #define ETH_TAP_MAC_ARG_FMT ETH_TAP_MAC_FIXED "|" ETH_TAP_USR_MAC_FMT
62 #define TAP_GSO_MBUFS_PER_CORE 128
63 #define TAP_GSO_MBUF_SEG_SIZE 128
64 #define TAP_GSO_MBUF_CACHE_SIZE 4
65 #define TAP_GSO_MBUFS_NUM \
66 (TAP_GSO_MBUFS_PER_CORE * TAP_GSO_MBUF_CACHE_SIZE)
68 /* IPC key for queue fds sync */
69 #define TAP_MP_KEY "tap_mp_sync_queues"
71 static int tap_devices_count;
72 static struct rte_vdev_driver pmd_tap_drv;
73 static struct rte_vdev_driver pmd_tun_drv;
75 static const char *valid_arguments[] = {
82 static char tuntap_name[8];
84 static volatile uint32_t tap_trigger; /* Rx trigger */
86 static struct rte_eth_link pmd_link = {
87 .link_speed = ETH_SPEED_NUM_10G,
88 .link_duplex = ETH_LINK_FULL_DUPLEX,
89 .link_status = ETH_LINK_DOWN,
90 .link_autoneg = ETH_LINK_FIXED,
94 tap_trigger_cb(int sig __rte_unused)
96 /* Valid trigger values are nonzero */
97 tap_trigger = (tap_trigger + 1) | 0x80000000;
100 /* Specifies on what netdevices the ioctl should be applied */
107 /* Message header to synchronize queues via IPC */
109 char port_name[RTE_DEV_NAME_MAX_LEN];
113 * The file descriptors are in the dedicated part
114 * of the Unix message to be translated by the kernel.
118 static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
121 * Tun/Tap allocation routine
124 * Pointer to private structure.
126 * @param[in] is_keepalive
130 * -1 on failure, fd on success
133 tun_alloc(struct pmd_internals *pmd, int is_keepalive)
136 #ifdef IFF_MULTI_QUEUE
137 unsigned int features;
141 memset(&ifr, 0, sizeof(struct ifreq));
144 * Do not set IFF_NO_PI as packet information header will be needed
145 * to check if a received packet has been truncated.
147 ifr.ifr_flags = (pmd->type == ETH_TUNTAP_TYPE_TAP) ?
148 IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
149 strlcpy(ifr.ifr_name, pmd->name, IFNAMSIZ);
151 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
153 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
157 #ifdef IFF_MULTI_QUEUE
158 /* Grab the TUN features to verify we can work multi-queue */
159 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
160 TAP_LOG(ERR, "%s unable to get TUN/TAP features",
164 TAP_LOG(DEBUG, "%s Features %08x", tuntap_name, features);
166 if (features & IFF_MULTI_QUEUE) {
167 TAP_LOG(DEBUG, " Multi-queue support for %d queues",
168 RTE_PMD_TAP_MAX_QUEUES);
169 ifr.ifr_flags |= IFF_MULTI_QUEUE;
173 ifr.ifr_flags |= IFF_ONE_QUEUE;
174 TAP_LOG(DEBUG, " Single queue only support");
177 /* Set the TUN/TAP configuration and set the name if needed */
178 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
179 TAP_LOG(WARNING, "Unable to set TUNSETIFF for %s: %s",
180 ifr.ifr_name, strerror(errno));
185 * Name passed to kernel might be wildcard like dtun%d
186 * and need to find the resulting device.
188 TAP_LOG(DEBUG, "Device name is '%s'", ifr.ifr_name);
189 strlcpy(pmd->name, ifr.ifr_name, RTE_ETH_NAME_MAX_LEN);
193 * Detach the TUN/TAP keep-alive queue
194 * to avoid traffic through it
196 ifr.ifr_flags = IFF_DETACH_QUEUE;
197 if (ioctl(fd, TUNSETQUEUE, (void *)&ifr) < 0) {
199 "Unable to detach keep-alive queue for %s: %s",
200 ifr.ifr_name, strerror(errno));
205 /* Always set the file descriptor to non-blocking */
206 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
208 "Unable to set %s to nonblocking: %s",
209 ifr.ifr_name, strerror(errno));
213 /* Set up trigger to optimize empty Rx bursts */
217 int flags = fcntl(fd, F_GETFL);
219 if (flags == -1 || sigaction(SIGIO, NULL, &sa) == -1)
221 if (sa.sa_handler != tap_trigger_cb) {
223 * Make sure SIGIO is not already taken. This is done
224 * as late as possible to leave the application a
225 * chance to set up its own signal handler first.
227 if (sa.sa_handler != SIG_IGN &&
228 sa.sa_handler != SIG_DFL) {
232 sa = (struct sigaction){
233 .sa_flags = SA_RESTART,
234 .sa_handler = tap_trigger_cb,
236 if (sigaction(SIGIO, &sa, NULL) == -1)
239 /* Enable SIGIO on file descriptor */
240 fcntl(fd, F_SETFL, flags | O_ASYNC);
241 fcntl(fd, F_SETOWN, getpid());
245 /* Disable trigger globally in case of error */
247 TAP_LOG(WARNING, "Rx trigger disabled: %s",
260 tap_verify_csum(struct rte_mbuf *mbuf)
262 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
263 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
264 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
265 unsigned int l2_len = sizeof(struct ether_hdr);
271 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
273 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
275 /* Don't verify checksum for packets with discontinuous L2 header */
276 if (unlikely(l2_len + sizeof(struct ipv4_hdr) >
277 rte_pktmbuf_data_len(mbuf)))
279 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
280 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
281 struct ipv4_hdr *iph = l3_hdr;
283 /* ihl contains the number of 4-byte words in the header */
284 l3_len = 4 * (iph->version_ihl & 0xf);
285 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
287 /* check that the total length reported by header is not
288 * greater than the total received size
290 if (l2_len + rte_be_to_cpu_16(iph->total_length) >
291 rte_pktmbuf_data_len(mbuf))
294 cksum = ~rte_raw_cksum(iph, l3_len);
295 mbuf->ol_flags |= cksum ?
296 PKT_RX_IP_CKSUM_BAD :
297 PKT_RX_IP_CKSUM_GOOD;
298 } else if (l3 == RTE_PTYPE_L3_IPV6) {
299 struct ipv6_hdr *iph = l3_hdr;
301 l3_len = sizeof(struct ipv6_hdr);
302 /* check that the total length reported by header is not
303 * greater than the total received size
305 if (l2_len + l3_len + rte_be_to_cpu_16(iph->payload_len) >
306 rte_pktmbuf_data_len(mbuf))
309 /* IPv6 extensions are not supported */
312 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
313 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
314 /* Don't verify checksum for multi-segment packets. */
315 if (mbuf->nb_segs > 1)
317 if (l3 == RTE_PTYPE_L3_IPV4)
318 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
319 else if (l3 == RTE_PTYPE_L3_IPV6)
320 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
321 mbuf->ol_flags |= cksum ?
322 PKT_RX_L4_CKSUM_BAD :
323 PKT_RX_L4_CKSUM_GOOD;
328 tap_rx_offload_get_port_capa(void)
331 * No specific port Rx offload capabilities.
337 tap_rx_offload_get_queue_capa(void)
339 return DEV_RX_OFFLOAD_SCATTER |
340 DEV_RX_OFFLOAD_IPV4_CKSUM |
341 DEV_RX_OFFLOAD_UDP_CKSUM |
342 DEV_RX_OFFLOAD_TCP_CKSUM;
345 /* Callback to handle the rx burst of packets to the correct interface and
346 * file descriptor(s) in a multi-queue setup.
349 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
351 struct rx_queue *rxq = queue;
352 struct pmd_process_private *process_private;
354 unsigned long num_rx_bytes = 0;
355 uint32_t trigger = tap_trigger;
357 if (trigger == rxq->trigger_seen)
360 rxq->trigger_seen = trigger;
361 process_private = rte_eth_devices[rxq->in_port].process_private;
362 rte_compiler_barrier();
363 for (num_rx = 0; num_rx < nb_pkts; ) {
364 struct rte_mbuf *mbuf = rxq->pool;
365 struct rte_mbuf *seg = NULL;
366 struct rte_mbuf *new_tail = NULL;
367 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
370 len = readv(process_private->rxq_fds[rxq->queue_id],
372 1 + (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
373 rxq->nb_rx_desc : 1));
374 if (len < (int)sizeof(struct tun_pi))
377 /* Packet couldn't fit in the provided mbuf */
378 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
379 rxq->stats.ierrors++;
383 len -= sizeof(struct tun_pi);
386 mbuf->port = rxq->in_port;
388 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
390 if (unlikely(!buf)) {
391 rxq->stats.rx_nombuf++;
392 /* No new buf has been allocated: do nothing */
393 if (!new_tail || !seg)
397 rte_pktmbuf_free(mbuf);
401 seg = seg ? seg->next : mbuf;
402 if (rxq->pool == mbuf)
405 new_tail->next = buf;
407 new_tail->next = seg->next;
409 /* iovecs[0] is reserved for packet info (pi) */
410 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
411 buf->buf_len - data_off;
412 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
413 (char *)buf->buf_addr + data_off;
415 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
416 seg->data_off = data_off;
418 len -= seg->data_len;
422 /* First segment has headroom, not the others */
426 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
428 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
429 tap_verify_csum(mbuf);
431 /* account for the receive frame */
432 bufs[num_rx++] = mbuf;
433 num_rx_bytes += mbuf->pkt_len;
436 rxq->stats.ipackets += num_rx;
437 rxq->stats.ibytes += num_rx_bytes;
443 tap_tx_offload_get_port_capa(void)
446 * No specific port Tx offload capabilities.
452 tap_tx_offload_get_queue_capa(void)
454 return DEV_TX_OFFLOAD_MULTI_SEGS |
455 DEV_TX_OFFLOAD_IPV4_CKSUM |
456 DEV_TX_OFFLOAD_UDP_CKSUM |
457 DEV_TX_OFFLOAD_TCP_CKSUM |
458 DEV_TX_OFFLOAD_TCP_TSO;
461 /* Finalize l4 checksum calculation */
463 tap_tx_l4_cksum(uint16_t *l4_cksum, uint16_t l4_phdr_cksum,
464 uint32_t l4_raw_cksum)
469 cksum = __rte_raw_cksum_reduce(l4_raw_cksum);
470 cksum += l4_phdr_cksum;
472 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
473 cksum = (~cksum) & 0xffff;
480 /* Accumaulate L4 raw checksums */
482 tap_tx_l4_add_rcksum(char *l4_data, unsigned int l4_len, uint16_t *l4_cksum,
483 uint32_t *l4_raw_cksum)
485 if (l4_cksum == NULL)
488 *l4_raw_cksum = __rte_raw_cksum(l4_data, l4_len, *l4_raw_cksum);
491 /* L3 and L4 pseudo headers checksum offloads */
493 tap_tx_l3_cksum(char *packet, uint64_t ol_flags, unsigned int l2_len,
494 unsigned int l3_len, unsigned int l4_len, uint16_t **l4_cksum,
495 uint16_t *l4_phdr_cksum, uint32_t *l4_raw_cksum)
497 void *l3_hdr = packet + l2_len;
499 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
500 struct ipv4_hdr *iph = l3_hdr;
503 iph->hdr_checksum = 0;
504 cksum = rte_raw_cksum(iph, l3_len);
505 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
507 if (ol_flags & PKT_TX_L4_MASK) {
510 l4_hdr = packet + l2_len + l3_len;
511 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
512 *l4_cksum = &((struct udp_hdr *)l4_hdr)->dgram_cksum;
513 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
514 *l4_cksum = &((struct tcp_hdr *)l4_hdr)->cksum;
518 if (ol_flags & PKT_TX_IPV4)
519 *l4_phdr_cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
521 *l4_phdr_cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
522 *l4_raw_cksum = __rte_raw_cksum(l4_hdr, l4_len, 0);
527 tap_write_mbufs(struct tx_queue *txq, uint16_t num_mbufs,
528 struct rte_mbuf **pmbufs,
529 uint16_t *num_packets, unsigned long *num_tx_bytes)
533 struct pmd_process_private *process_private;
535 process_private = rte_eth_devices[txq->out_port].process_private;
537 for (i = 0; i < num_mbufs; i++) {
538 struct rte_mbuf *mbuf = pmbufs[i];
539 struct iovec iovecs[mbuf->nb_segs + 2];
540 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
541 struct rte_mbuf *seg = mbuf;
542 char m_copy[mbuf->data_len];
546 int k; /* current index in iovecs for copying segments */
547 uint16_t seg_len; /* length of first segment */
549 uint16_t *l4_cksum; /* l4 checksum (pseudo header + payload) */
550 uint32_t l4_raw_cksum = 0; /* TCP/UDP payload raw checksum */
551 uint16_t l4_phdr_cksum = 0; /* TCP/UDP pseudo header checksum */
552 uint16_t is_cksum = 0; /* in case cksum should be offloaded */
555 if (txq->type == ETH_TUNTAP_TYPE_TUN) {
557 * TUN and TAP are created with IFF_NO_PI disabled.
558 * For TUN PMD this mandatory as fields are used by
559 * Kernel tun.c to determine whether its IP or non IP
562 * The logic fetches the first byte of data from mbuf
563 * then compares whether its v4 or v6. If first byte
564 * is 4 or 6, then protocol field is updated.
566 char *buff_data = rte_pktmbuf_mtod(seg, void *);
567 proto = (*buff_data & 0xf0);
568 pi.proto = (proto == 0x40) ?
569 rte_cpu_to_be_16(ETHER_TYPE_IPv4) :
571 rte_cpu_to_be_16(ETHER_TYPE_IPv6) :
576 iovecs[k].iov_base = π
577 iovecs[k].iov_len = sizeof(pi);
580 nb_segs = mbuf->nb_segs;
582 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
583 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
584 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
587 /* Support only packets with at least layer 4
588 * header included in the first segment
590 seg_len = rte_pktmbuf_data_len(mbuf);
591 l234_hlen = mbuf->l2_len + mbuf->l3_len + mbuf->l4_len;
592 if (seg_len < l234_hlen)
595 /* To change checksums, work on a * copy of l2, l3
596 * headers + l4 pseudo header
598 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
600 tap_tx_l3_cksum(m_copy, mbuf->ol_flags,
601 mbuf->l2_len, mbuf->l3_len, mbuf->l4_len,
602 &l4_cksum, &l4_phdr_cksum,
604 iovecs[k].iov_base = m_copy;
605 iovecs[k].iov_len = l234_hlen;
608 /* Update next iovecs[] beyond l2, l3, l4 headers */
609 if (seg_len > l234_hlen) {
610 iovecs[k].iov_len = seg_len - l234_hlen;
612 rte_pktmbuf_mtod(seg, char *) +
614 tap_tx_l4_add_rcksum(iovecs[k].iov_base,
615 iovecs[k].iov_len, l4_cksum,
623 for (j = k; j <= nb_segs; j++) {
624 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
625 iovecs[j].iov_base = rte_pktmbuf_mtod(seg, void *);
627 tap_tx_l4_add_rcksum(iovecs[j].iov_base,
628 iovecs[j].iov_len, l4_cksum,
634 tap_tx_l4_cksum(l4_cksum, l4_phdr_cksum, l4_raw_cksum);
636 /* copy the tx frame data */
637 n = writev(process_private->txq_fds[txq->queue_id], iovecs, j);
641 (*num_tx_bytes) += rte_pktmbuf_pkt_len(mbuf);
645 /* Callback to handle sending packets from the tap interface
648 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
650 struct tx_queue *txq = queue;
652 uint16_t num_packets = 0;
653 unsigned long num_tx_bytes = 0;
657 if (unlikely(nb_pkts == 0))
660 struct rte_mbuf *gso_mbufs[MAX_GSO_MBUFS];
661 max_size = *txq->mtu + (ETHER_HDR_LEN + ETHER_CRC_LEN + 4);
662 for (i = 0; i < nb_pkts; i++) {
663 struct rte_mbuf *mbuf_in = bufs[num_tx];
664 struct rte_mbuf **mbuf;
665 uint16_t num_mbufs = 0;
666 uint16_t tso_segsz = 0;
672 tso = mbuf_in->ol_flags & PKT_TX_TCP_SEG;
674 struct rte_gso_ctx *gso_ctx = &txq->gso_ctx;
676 assert(gso_ctx != NULL);
678 /* TCP segmentation implies TCP checksum offload */
679 mbuf_in->ol_flags |= PKT_TX_TCP_CKSUM;
681 /* gso size is calculated without ETHER_CRC_LEN */
682 hdrs_len = mbuf_in->l2_len + mbuf_in->l3_len +
684 tso_segsz = mbuf_in->tso_segsz + hdrs_len;
685 if (unlikely(tso_segsz == hdrs_len) ||
686 tso_segsz > *txq->mtu) {
690 gso_ctx->gso_size = tso_segsz;
691 ret = rte_gso_segment(mbuf_in, /* packet to segment */
692 gso_ctx, /* gso control block */
693 (struct rte_mbuf **)&gso_mbufs, /* out mbufs */
694 RTE_DIM(gso_mbufs)); /* max tso mbufs */
696 /* ret contains the number of new created mbufs */
703 /* stats.errs will be incremented */
704 if (rte_pktmbuf_pkt_len(mbuf_in) > max_size)
707 /* ret 0 indicates no new mbufs were created */
713 tap_write_mbufs(txq, num_mbufs, mbuf,
714 &num_packets, &num_tx_bytes);
716 /* free original mbuf */
717 rte_pktmbuf_free(mbuf_in);
719 for (j = 0; j < ret; j++)
720 rte_pktmbuf_free(mbuf[j]);
723 txq->stats.opackets += num_packets;
724 txq->stats.errs += nb_pkts - num_tx;
725 txq->stats.obytes += num_tx_bytes;
731 tap_ioctl_req2str(unsigned long request)
735 return "SIOCSIFFLAGS";
737 return "SIOCGIFFLAGS";
739 return "SIOCGIFHWADDR";
741 return "SIOCSIFHWADDR";
749 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
750 struct ifreq *ifr, int set, enum ioctl_mode mode)
752 short req_flags = ifr->ifr_flags;
753 int remote = pmd->remote_if_index &&
754 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
756 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
759 * If there is a remote netdevice, apply ioctl on it, then apply it on
764 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
765 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
766 snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->name);
769 /* fetch current flags to leave other flags untouched */
770 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
773 ifr->ifr_flags |= req_flags;
775 ifr->ifr_flags &= ~req_flags;
783 RTE_LOG(WARNING, PMD, "%s: ioctl() called with wrong arg\n",
787 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
789 if (remote-- && mode == LOCAL_AND_REMOTE)
794 TAP_LOG(DEBUG, "%s(%s) failed: %s(%d)", ifr->ifr_name,
795 tap_ioctl_req2str(request), strerror(errno), errno);
800 tap_link_set_down(struct rte_eth_dev *dev)
802 struct pmd_internals *pmd = dev->data->dev_private;
803 struct ifreq ifr = { .ifr_flags = IFF_UP };
805 dev->data->dev_link.link_status = ETH_LINK_DOWN;
806 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
810 tap_link_set_up(struct rte_eth_dev *dev)
812 struct pmd_internals *pmd = dev->data->dev_private;
813 struct ifreq ifr = { .ifr_flags = IFF_UP };
815 dev->data->dev_link.link_status = ETH_LINK_UP;
816 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
820 tap_dev_start(struct rte_eth_dev *dev)
824 err = tap_intr_handle_set(dev, 1);
828 err = tap_link_set_up(dev);
832 for (i = 0; i < dev->data->nb_tx_queues; i++)
833 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
834 for (i = 0; i < dev->data->nb_rx_queues; i++)
835 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
840 /* This function gets called when the current port gets stopped.
843 tap_dev_stop(struct rte_eth_dev *dev)
847 for (i = 0; i < dev->data->nb_tx_queues; i++)
848 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
849 for (i = 0; i < dev->data->nb_rx_queues; i++)
850 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
852 tap_intr_handle_set(dev, 0);
853 tap_link_set_down(dev);
857 tap_dev_configure(struct rte_eth_dev *dev)
859 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
861 "%s: number of rx queues %d exceeds max num of queues %d",
863 dev->data->nb_rx_queues,
864 RTE_PMD_TAP_MAX_QUEUES);
867 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
869 "%s: number of tx queues %d exceeds max num of queues %d",
871 dev->data->nb_tx_queues,
872 RTE_PMD_TAP_MAX_QUEUES);
876 TAP_LOG(INFO, "%s: %p: TX configured queues number: %u",
877 dev->device->name, (void *)dev, dev->data->nb_tx_queues);
879 TAP_LOG(INFO, "%s: %p: RX configured queues number: %u",
880 dev->device->name, (void *)dev, dev->data->nb_rx_queues);
886 tap_dev_speed_capa(void)
888 uint32_t speed = pmd_link.link_speed;
891 if (speed >= ETH_SPEED_NUM_10M)
892 capa |= ETH_LINK_SPEED_10M;
893 if (speed >= ETH_SPEED_NUM_100M)
894 capa |= ETH_LINK_SPEED_100M;
895 if (speed >= ETH_SPEED_NUM_1G)
896 capa |= ETH_LINK_SPEED_1G;
897 if (speed >= ETH_SPEED_NUM_5G)
898 capa |= ETH_LINK_SPEED_2_5G;
899 if (speed >= ETH_SPEED_NUM_5G)
900 capa |= ETH_LINK_SPEED_5G;
901 if (speed >= ETH_SPEED_NUM_10G)
902 capa |= ETH_LINK_SPEED_10G;
903 if (speed >= ETH_SPEED_NUM_20G)
904 capa |= ETH_LINK_SPEED_20G;
905 if (speed >= ETH_SPEED_NUM_25G)
906 capa |= ETH_LINK_SPEED_25G;
907 if (speed >= ETH_SPEED_NUM_40G)
908 capa |= ETH_LINK_SPEED_40G;
909 if (speed >= ETH_SPEED_NUM_50G)
910 capa |= ETH_LINK_SPEED_50G;
911 if (speed >= ETH_SPEED_NUM_56G)
912 capa |= ETH_LINK_SPEED_56G;
913 if (speed >= ETH_SPEED_NUM_100G)
914 capa |= ETH_LINK_SPEED_100G;
920 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
922 struct pmd_internals *internals = dev->data->dev_private;
924 dev_info->if_index = internals->if_index;
925 dev_info->max_mac_addrs = 1;
926 dev_info->max_rx_pktlen = (uint32_t)ETHER_MAX_VLAN_FRAME_LEN;
927 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
928 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
929 dev_info->min_rx_bufsize = 0;
930 dev_info->speed_capa = tap_dev_speed_capa();
931 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
932 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
933 dev_info->rx_queue_offload_capa;
934 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
935 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
936 dev_info->tx_queue_offload_capa;
937 dev_info->hash_key_size = TAP_RSS_HASH_KEY_SIZE;
939 * limitation: TAP supports all of IP, UDP and TCP hash
940 * functions together and not in partial combinations
942 dev_info->flow_type_rss_offloads = ~TAP_RSS_HF_MASK;
946 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
948 unsigned int i, imax;
949 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
950 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
951 unsigned long rx_nombuf = 0, ierrors = 0;
952 const struct pmd_internals *pmd = dev->data->dev_private;
954 /* rx queue statistics */
955 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
956 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
957 for (i = 0; i < imax; i++) {
958 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
959 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
960 rx_total += tap_stats->q_ipackets[i];
961 rx_bytes_total += tap_stats->q_ibytes[i];
962 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
963 ierrors += pmd->rxq[i].stats.ierrors;
966 /* tx queue statistics */
967 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
968 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
970 for (i = 0; i < imax; i++) {
971 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
972 tap_stats->q_errors[i] = pmd->txq[i].stats.errs;
973 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
974 tx_total += tap_stats->q_opackets[i];
975 tx_err_total += tap_stats->q_errors[i];
976 tx_bytes_total += tap_stats->q_obytes[i];
979 tap_stats->ipackets = rx_total;
980 tap_stats->ibytes = rx_bytes_total;
981 tap_stats->ierrors = ierrors;
982 tap_stats->rx_nombuf = rx_nombuf;
983 tap_stats->opackets = tx_total;
984 tap_stats->oerrors = tx_err_total;
985 tap_stats->obytes = tx_bytes_total;
990 tap_stats_reset(struct rte_eth_dev *dev)
993 struct pmd_internals *pmd = dev->data->dev_private;
995 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
996 pmd->rxq[i].stats.ipackets = 0;
997 pmd->rxq[i].stats.ibytes = 0;
998 pmd->rxq[i].stats.ierrors = 0;
999 pmd->rxq[i].stats.rx_nombuf = 0;
1001 pmd->txq[i].stats.opackets = 0;
1002 pmd->txq[i].stats.errs = 0;
1003 pmd->txq[i].stats.obytes = 0;
1008 tap_dev_close(struct rte_eth_dev *dev)
1011 struct pmd_internals *internals = dev->data->dev_private;
1012 struct pmd_process_private *process_private = dev->process_private;
1014 tap_link_set_down(dev);
1015 tap_flow_flush(dev, NULL);
1016 tap_flow_implicit_flush(internals, NULL);
1018 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1019 if (process_private->rxq_fds[i] != -1) {
1020 close(process_private->rxq_fds[i]);
1021 process_private->rxq_fds[i] = -1;
1023 if (process_private->txq_fds[i] != -1) {
1024 close(process_private->txq_fds[i]);
1025 process_private->txq_fds[i] = -1;
1029 if (internals->remote_if_index) {
1030 /* Restore initial remote state */
1031 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
1032 &internals->remote_initial_flags);
1035 if (internals->ka_fd != -1) {
1036 close(internals->ka_fd);
1037 internals->ka_fd = -1;
1040 * Since TUN device has no more opened file descriptors
1041 * it will be removed from kernel
1046 tap_rx_queue_release(void *queue)
1048 struct rx_queue *rxq = queue;
1049 struct pmd_process_private *process_private;
1053 process_private = rte_eth_devices[rxq->in_port].process_private;
1054 if (process_private->rxq_fds[rxq->queue_id] > 0) {
1055 close(process_private->rxq_fds[rxq->queue_id]);
1056 process_private->rxq_fds[rxq->queue_id] = -1;
1057 rte_pktmbuf_free(rxq->pool);
1058 rte_free(rxq->iovecs);
1065 tap_tx_queue_release(void *queue)
1067 struct tx_queue *txq = queue;
1068 struct pmd_process_private *process_private;
1072 process_private = rte_eth_devices[txq->out_port].process_private;
1074 if (process_private->txq_fds[txq->queue_id] > 0) {
1075 close(process_private->txq_fds[txq->queue_id]);
1076 process_private->txq_fds[txq->queue_id] = -1;
1081 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
1083 struct rte_eth_link *dev_link = &dev->data->dev_link;
1084 struct pmd_internals *pmd = dev->data->dev_private;
1085 struct ifreq ifr = { .ifr_flags = 0 };
1087 if (pmd->remote_if_index) {
1088 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
1089 if (!(ifr.ifr_flags & IFF_UP) ||
1090 !(ifr.ifr_flags & IFF_RUNNING)) {
1091 dev_link->link_status = ETH_LINK_DOWN;
1095 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
1096 dev_link->link_status =
1097 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
1104 tap_promisc_enable(struct rte_eth_dev *dev)
1106 struct pmd_internals *pmd = dev->data->dev_private;
1107 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1109 dev->data->promiscuous = 1;
1110 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1111 if (pmd->remote_if_index && !pmd->flow_isolate)
1112 tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
1116 tap_promisc_disable(struct rte_eth_dev *dev)
1118 struct pmd_internals *pmd = dev->data->dev_private;
1119 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1121 dev->data->promiscuous = 0;
1122 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1123 if (pmd->remote_if_index && !pmd->flow_isolate)
1124 tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
1128 tap_allmulti_enable(struct rte_eth_dev *dev)
1130 struct pmd_internals *pmd = dev->data->dev_private;
1131 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1133 dev->data->all_multicast = 1;
1134 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1135 if (pmd->remote_if_index && !pmd->flow_isolate)
1136 tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
1140 tap_allmulti_disable(struct rte_eth_dev *dev)
1142 struct pmd_internals *pmd = dev->data->dev_private;
1143 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1145 dev->data->all_multicast = 0;
1146 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1147 if (pmd->remote_if_index && !pmd->flow_isolate)
1148 tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
1152 tap_mac_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
1154 struct pmd_internals *pmd = dev->data->dev_private;
1155 enum ioctl_mode mode = LOCAL_ONLY;
1159 if (pmd->type == ETH_TUNTAP_TYPE_TUN) {
1160 TAP_LOG(ERR, "%s: can't MAC address for TUN",
1165 if (is_zero_ether_addr(mac_addr)) {
1166 TAP_LOG(ERR, "%s: can't set an empty MAC address",
1170 /* Check the actual current MAC address on the tap netdevice */
1171 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
1174 if (is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
1177 /* Check the current MAC address on the remote */
1178 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
1181 if (!is_same_ether_addr((struct ether_addr *)&ifr.ifr_hwaddr.sa_data,
1183 mode = LOCAL_AND_REMOTE;
1184 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1185 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, ETHER_ADDR_LEN);
1186 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
1189 rte_memcpy(&pmd->eth_addr, mac_addr, ETHER_ADDR_LEN);
1190 if (pmd->remote_if_index && !pmd->flow_isolate) {
1191 /* Replace MAC redirection rule after a MAC change */
1192 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
1195 "%s: Couldn't delete MAC redirection rule",
1199 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
1202 "%s: Couldn't add MAC redirection rule",
1212 tap_gso_ctx_setup(struct rte_gso_ctx *gso_ctx, struct rte_eth_dev *dev)
1218 * Create private mbuf pool with TAP_GSO_MBUF_SEG_SIZE bytes
1219 * size per mbuf use this pool for both direct and indirect mbufs
1222 struct rte_mempool *mp; /* Mempool for GSO packets */
1224 /* initialize GSO context */
1225 gso_types = DEV_TX_OFFLOAD_TCP_TSO;
1226 snprintf(pool_name, sizeof(pool_name), "mp_%s", dev->device->name);
1227 mp = rte_mempool_lookup((const char *)pool_name);
1229 mp = rte_pktmbuf_pool_create(pool_name, TAP_GSO_MBUFS_NUM,
1230 TAP_GSO_MBUF_CACHE_SIZE, 0,
1231 RTE_PKTMBUF_HEADROOM + TAP_GSO_MBUF_SEG_SIZE,
1234 struct pmd_internals *pmd = dev->data->dev_private;
1235 RTE_LOG(DEBUG, PMD, "%s: failed to create mbuf pool for device %s\n",
1236 pmd->name, dev->device->name);
1241 gso_ctx->direct_pool = mp;
1242 gso_ctx->indirect_pool = mp;
1243 gso_ctx->gso_types = gso_types;
1244 gso_ctx->gso_size = 0; /* gso_size is set in tx_burst() per packet */
1251 tap_setup_queue(struct rte_eth_dev *dev,
1252 struct pmd_internals *internals,
1260 struct pmd_internals *pmd = dev->data->dev_private;
1261 struct pmd_process_private *process_private = dev->process_private;
1262 struct rx_queue *rx = &internals->rxq[qid];
1263 struct tx_queue *tx = &internals->txq[qid];
1264 struct rte_gso_ctx *gso_ctx;
1267 fd = &process_private->rxq_fds[qid];
1268 other_fd = &process_private->txq_fds[qid];
1272 fd = &process_private->txq_fds[qid];
1273 other_fd = &process_private->rxq_fds[qid];
1275 gso_ctx = &tx->gso_ctx;
1278 /* fd for this queue already exists */
1279 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1280 pmd->name, *fd, dir, qid);
1282 } else if (*other_fd != -1) {
1283 /* Only other_fd exists. dup it */
1284 *fd = dup(*other_fd);
1287 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1290 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1291 pmd->name, *other_fd, dir, qid, *fd);
1293 /* Both RX and TX fds do not exist (equal -1). Create fd */
1294 *fd = tun_alloc(pmd, 0);
1296 *fd = -1; /* restore original value */
1297 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1300 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1301 pmd->name, dir, qid, *fd);
1304 tx->mtu = &dev->data->mtu;
1305 rx->rxmode = &dev->data->dev_conf.rxmode;
1307 ret = tap_gso_ctx_setup(gso_ctx, dev);
1312 tx->type = pmd->type;
1318 tap_rx_queue_setup(struct rte_eth_dev *dev,
1319 uint16_t rx_queue_id,
1320 uint16_t nb_rx_desc,
1321 unsigned int socket_id,
1322 const struct rte_eth_rxconf *rx_conf __rte_unused,
1323 struct rte_mempool *mp)
1325 struct pmd_internals *internals = dev->data->dev_private;
1326 struct pmd_process_private *process_private = dev->process_private;
1327 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1328 struct rte_mbuf **tmp = &rxq->pool;
1329 long iov_max = sysconf(_SC_IOV_MAX);
1330 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1331 struct iovec (*iovecs)[nb_desc + 1];
1332 int data_off = RTE_PKTMBUF_HEADROOM;
1337 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1339 "nb_rx_queues %d too small or mempool NULL",
1340 dev->data->nb_rx_queues);
1345 rxq->trigger_seen = 1; /* force initial burst */
1346 rxq->in_port = dev->data->port_id;
1347 rxq->queue_id = rx_queue_id;
1348 rxq->nb_rx_desc = nb_desc;
1349 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1353 "%s: Couldn't allocate %d RX descriptors",
1354 dev->device->name, nb_desc);
1357 rxq->iovecs = iovecs;
1359 dev->data->rx_queues[rx_queue_id] = rxq;
1360 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1366 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1367 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1369 for (i = 1; i <= nb_desc; i++) {
1370 *tmp = rte_pktmbuf_alloc(rxq->mp);
1373 "%s: couldn't allocate memory for queue %d",
1374 dev->device->name, rx_queue_id);
1378 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1379 (*rxq->iovecs)[i].iov_base =
1380 (char *)(*tmp)->buf_addr + data_off;
1382 tmp = &(*tmp)->next;
1385 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1386 internals->name, rx_queue_id,
1387 process_private->rxq_fds[rx_queue_id]);
1392 rte_pktmbuf_free(rxq->pool);
1394 rte_free(rxq->iovecs);
1400 tap_tx_queue_setup(struct rte_eth_dev *dev,
1401 uint16_t tx_queue_id,
1402 uint16_t nb_tx_desc __rte_unused,
1403 unsigned int socket_id __rte_unused,
1404 const struct rte_eth_txconf *tx_conf)
1406 struct pmd_internals *internals = dev->data->dev_private;
1407 struct pmd_process_private *process_private = dev->process_private;
1408 struct tx_queue *txq;
1412 if (tx_queue_id >= dev->data->nb_tx_queues)
1414 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1415 txq = dev->data->tx_queues[tx_queue_id];
1416 txq->out_port = dev->data->port_id;
1417 txq->queue_id = tx_queue_id;
1419 offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1420 txq->csum = !!(offloads &
1421 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1422 DEV_TX_OFFLOAD_UDP_CKSUM |
1423 DEV_TX_OFFLOAD_TCP_CKSUM));
1425 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1429 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1430 internals->name, tx_queue_id,
1431 process_private->txq_fds[tx_queue_id],
1432 txq->csum ? "on" : "off");
1438 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1440 struct pmd_internals *pmd = dev->data->dev_private;
1441 struct ifreq ifr = { .ifr_mtu = mtu };
1444 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1446 dev->data->mtu = mtu;
1452 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1453 struct ether_addr *mc_addr_set __rte_unused,
1454 uint32_t nb_mc_addr __rte_unused)
1457 * Nothing to do actually: the tap has no filtering whatsoever, every
1458 * packet is received.
1464 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1466 struct rte_eth_dev *dev = arg;
1467 struct pmd_internals *pmd = dev->data->dev_private;
1468 struct ifinfomsg *info = NLMSG_DATA(nh);
1470 if (nh->nlmsg_type != RTM_NEWLINK ||
1471 (info->ifi_index != pmd->if_index &&
1472 info->ifi_index != pmd->remote_if_index))
1474 return tap_link_update(dev, 0);
1478 tap_dev_intr_handler(void *cb_arg)
1480 struct rte_eth_dev *dev = cb_arg;
1481 struct pmd_internals *pmd = dev->data->dev_private;
1483 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1487 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1489 struct pmd_internals *pmd = dev->data->dev_private;
1491 /* In any case, disable interrupt if the conf is no longer there. */
1492 if (!dev->data->dev_conf.intr_conf.lsc) {
1493 if (pmd->intr_handle.fd != -1) {
1494 tap_nl_final(pmd->intr_handle.fd);
1495 rte_intr_callback_unregister(&pmd->intr_handle,
1496 tap_dev_intr_handler, dev);
1501 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1502 if (unlikely(pmd->intr_handle.fd == -1))
1504 return rte_intr_callback_register(
1505 &pmd->intr_handle, tap_dev_intr_handler, dev);
1507 tap_nl_final(pmd->intr_handle.fd);
1508 return rte_intr_callback_unregister(&pmd->intr_handle,
1509 tap_dev_intr_handler, dev);
1513 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1517 err = tap_lsc_intr_handle_set(dev, set);
1520 err = tap_rx_intr_vec_set(dev, set);
1522 tap_lsc_intr_handle_set(dev, 0);
1526 static const uint32_t*
1527 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1529 static const uint32_t ptypes[] = {
1530 RTE_PTYPE_INNER_L2_ETHER,
1531 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1532 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1533 RTE_PTYPE_INNER_L3_IPV4,
1534 RTE_PTYPE_INNER_L3_IPV4_EXT,
1535 RTE_PTYPE_INNER_L3_IPV6,
1536 RTE_PTYPE_INNER_L3_IPV6_EXT,
1537 RTE_PTYPE_INNER_L4_FRAG,
1538 RTE_PTYPE_INNER_L4_UDP,
1539 RTE_PTYPE_INNER_L4_TCP,
1540 RTE_PTYPE_INNER_L4_SCTP,
1542 RTE_PTYPE_L2_ETHER_VLAN,
1543 RTE_PTYPE_L2_ETHER_QINQ,
1545 RTE_PTYPE_L3_IPV4_EXT,
1546 RTE_PTYPE_L3_IPV6_EXT,
1558 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1559 struct rte_eth_fc_conf *fc_conf)
1561 fc_conf->mode = RTE_FC_NONE;
1566 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1567 struct rte_eth_fc_conf *fc_conf)
1569 if (fc_conf->mode != RTE_FC_NONE)
1575 * DPDK callback to update the RSS hash configuration.
1578 * Pointer to Ethernet device structure.
1579 * @param[in] rss_conf
1580 * RSS configuration data.
1583 * 0 on success, a negative errno value otherwise and rte_errno is set.
1586 tap_rss_hash_update(struct rte_eth_dev *dev,
1587 struct rte_eth_rss_conf *rss_conf)
1589 if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
1593 if (rss_conf->rss_key && rss_conf->rss_key_len) {
1595 * Currently TAP RSS key is hard coded
1596 * and cannot be updated
1599 "port %u RSS key cannot be updated",
1600 dev->data->port_id);
1608 tap_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1610 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1616 tap_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1618 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1624 tap_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1626 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1632 tap_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1634 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1638 static const struct eth_dev_ops ops = {
1639 .dev_start = tap_dev_start,
1640 .dev_stop = tap_dev_stop,
1641 .dev_close = tap_dev_close,
1642 .dev_configure = tap_dev_configure,
1643 .dev_infos_get = tap_dev_info,
1644 .rx_queue_setup = tap_rx_queue_setup,
1645 .tx_queue_setup = tap_tx_queue_setup,
1646 .rx_queue_start = tap_rx_queue_start,
1647 .tx_queue_start = tap_tx_queue_start,
1648 .rx_queue_stop = tap_rx_queue_stop,
1649 .tx_queue_stop = tap_tx_queue_stop,
1650 .rx_queue_release = tap_rx_queue_release,
1651 .tx_queue_release = tap_tx_queue_release,
1652 .flow_ctrl_get = tap_flow_ctrl_get,
1653 .flow_ctrl_set = tap_flow_ctrl_set,
1654 .link_update = tap_link_update,
1655 .dev_set_link_up = tap_link_set_up,
1656 .dev_set_link_down = tap_link_set_down,
1657 .promiscuous_enable = tap_promisc_enable,
1658 .promiscuous_disable = tap_promisc_disable,
1659 .allmulticast_enable = tap_allmulti_enable,
1660 .allmulticast_disable = tap_allmulti_disable,
1661 .mac_addr_set = tap_mac_set,
1662 .mtu_set = tap_mtu_set,
1663 .set_mc_addr_list = tap_set_mc_addr_list,
1664 .stats_get = tap_stats_get,
1665 .stats_reset = tap_stats_reset,
1666 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1667 .rss_hash_update = tap_rss_hash_update,
1668 .filter_ctrl = tap_dev_filter_ctrl,
1672 eth_dev_tap_create(struct rte_vdev_device *vdev, char *tap_name,
1673 char *remote_iface, struct ether_addr *mac_addr,
1674 enum rte_tuntap_type type)
1676 int numa_node = rte_socket_id();
1677 struct rte_eth_dev *dev;
1678 struct pmd_internals *pmd;
1679 struct pmd_process_private *process_private;
1680 struct rte_eth_dev_data *data;
1684 TAP_LOG(DEBUG, "%s device on numa %u",
1685 tuntap_name, rte_socket_id());
1687 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1689 TAP_LOG(ERR, "%s Unable to allocate device struct",
1691 goto error_exit_nodev;
1694 process_private = (struct pmd_process_private *)
1695 rte_zmalloc_socket(tap_name, sizeof(struct pmd_process_private),
1696 RTE_CACHE_LINE_SIZE, dev->device->numa_node);
1698 if (process_private == NULL) {
1699 TAP_LOG(ERR, "Failed to alloc memory for process private");
1702 pmd = dev->data->dev_private;
1703 dev->process_private = process_private;
1705 snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
1708 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1709 if (pmd->ioctl_sock == -1) {
1711 "%s Unable to get a socket for management: %s",
1712 tuntap_name, strerror(errno));
1716 /* Setup some default values */
1718 data->dev_private = pmd;
1719 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1720 data->numa_node = numa_node;
1722 data->dev_link = pmd_link;
1723 data->mac_addrs = &pmd->eth_addr;
1724 /* Set the number of RX and TX queues */
1725 data->nb_rx_queues = 0;
1726 data->nb_tx_queues = 0;
1728 dev->dev_ops = &ops;
1729 dev->rx_pkt_burst = pmd_rx_burst;
1730 dev->tx_pkt_burst = pmd_tx_burst;
1732 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1733 pmd->intr_handle.fd = -1;
1734 dev->intr_handle = &pmd->intr_handle;
1736 /* Presetup the fds to -1 as being not valid */
1738 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1739 process_private->rxq_fds[i] = -1;
1740 process_private->txq_fds[i] = -1;
1743 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1744 if (is_zero_ether_addr(mac_addr))
1745 eth_random_addr((uint8_t *)&pmd->eth_addr);
1747 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1751 * Allocate a TUN device keep-alive file descriptor that will only be
1752 * closed when the TUN device itself is closed or removed.
1753 * This keep-alive file descriptor will guarantee that the TUN device
1754 * exists even when all of its queues are closed
1756 pmd->ka_fd = tun_alloc(pmd, 1);
1757 if (pmd->ka_fd == -1) {
1758 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
1761 TAP_LOG(DEBUG, "allocated %s", pmd->name);
1763 ifr.ifr_mtu = dev->data->mtu;
1764 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1767 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1768 memset(&ifr, 0, sizeof(struct ifreq));
1769 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1770 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1772 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1777 * Set up everything related to rte_flow:
1779 * - tap / remote if_index
1780 * - mandatory QDISCs
1781 * - rte_flow actual/implicit lists
1784 pmd->nlsk_fd = tap_nl_init(0);
1785 if (pmd->nlsk_fd == -1) {
1786 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
1788 goto disable_rte_flow;
1790 pmd->if_index = if_nametoindex(pmd->name);
1791 if (!pmd->if_index) {
1792 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
1793 goto disable_rte_flow;
1795 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1796 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
1798 goto disable_rte_flow;
1800 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1801 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1803 goto disable_rte_flow;
1805 LIST_INIT(&pmd->flows);
1807 if (strlen(remote_iface)) {
1808 pmd->remote_if_index = if_nametoindex(remote_iface);
1809 if (!pmd->remote_if_index) {
1810 TAP_LOG(ERR, "%s: failed to get %s if_index.",
1811 pmd->name, remote_iface);
1814 snprintf(pmd->remote_iface, RTE_ETH_NAME_MAX_LEN,
1815 "%s", remote_iface);
1817 /* Save state of remote device */
1818 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1820 /* Replicate remote MAC address */
1821 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1822 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1823 pmd->name, pmd->remote_iface);
1826 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1828 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
1829 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
1830 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1831 pmd->name, remote_iface);
1836 * Flush usually returns negative value because it tries to
1837 * delete every QDISC (and on a running device, one QDISC at
1838 * least is needed). Ignore negative return value.
1840 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
1841 if (qdisc_create_ingress(pmd->nlsk_fd,
1842 pmd->remote_if_index) < 0) {
1843 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1847 LIST_INIT(&pmd->implicit_flows);
1848 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
1849 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
1850 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
1851 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
1853 "%s: failed to create implicit rules.",
1859 rte_eth_dev_probing_finish(dev);
1863 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
1864 strerror(errno), errno);
1865 if (strlen(remote_iface)) {
1866 TAP_LOG(ERR, "Remote feature requires flow support.");
1869 rte_eth_dev_probing_finish(dev);
1873 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
1874 strerror(errno), errno);
1875 tap_flow_implicit_flush(pmd, NULL);
1878 if (pmd->ioctl_sock > 0)
1879 close(pmd->ioctl_sock);
1880 /* mac_addrs must not be freed alone because part of dev_private */
1881 dev->data->mac_addrs = NULL;
1882 rte_eth_dev_release_port(dev);
1885 TAP_LOG(ERR, "%s Unable to initialize %s",
1886 tuntap_name, rte_vdev_device_name(vdev));
1891 /* make sure name is a possible Linux network device name */
1893 is_valid_iface(const char *name)
1898 if (strnlen(name, IFNAMSIZ) == IFNAMSIZ)
1902 if (*name == '/' || *name == ':' || isspace(*name))
1910 set_interface_name(const char *key __rte_unused,
1914 char *name = (char *)extra_args;
1917 if (!is_valid_iface(value)) {
1918 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
1922 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1924 /* use tap%d which causes kernel to choose next available */
1925 strlcpy(name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
1931 set_remote_iface(const char *key __rte_unused,
1935 char *name = (char *)extra_args;
1938 if (!is_valid_iface(value)) {
1939 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
1943 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
1949 static int parse_user_mac(struct ether_addr *user_mac,
1952 unsigned int index = 0;
1953 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
1955 if (user_mac == NULL || value == NULL)
1958 strlcpy(mac_temp, value, sizeof(mac_temp));
1959 mac_byte = strtok(mac_temp, ":");
1961 while ((mac_byte != NULL) &&
1962 (strlen(mac_byte) <= 2) &&
1963 (strlen(mac_byte) == strspn(mac_byte,
1964 ETH_TAP_CMP_MAC_FMT))) {
1965 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
1966 mac_byte = strtok(NULL, ":");
1973 set_mac_type(const char *key __rte_unused,
1977 struct ether_addr *user_mac = extra_args;
1982 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
1983 static int iface_idx;
1985 /* fixed mac = 00:64:74:61:70:<iface_idx> */
1986 memcpy((char *)user_mac->addr_bytes, "\0dtap", ETHER_ADDR_LEN);
1987 user_mac->addr_bytes[ETHER_ADDR_LEN - 1] = iface_idx++ + '0';
1991 if (parse_user_mac(user_mac, value) != 6)
1994 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
1998 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
1999 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
2004 * Open a TUN interface device. TUN PMD
2005 * 1) sets tap_type as false
2006 * 2) intakes iface as argument.
2007 * 3) as interface is virtual set speed to 10G
2010 rte_pmd_tun_probe(struct rte_vdev_device *dev)
2012 const char *name, *params;
2014 struct rte_kvargs *kvlist = NULL;
2015 char tun_name[RTE_ETH_NAME_MAX_LEN];
2016 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2017 struct rte_eth_dev *eth_dev;
2019 strcpy(tuntap_name, "TUN");
2021 name = rte_vdev_device_name(dev);
2022 params = rte_vdev_device_args(dev);
2023 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2025 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
2026 strlen(params) == 0) {
2027 eth_dev = rte_eth_dev_attach_secondary(name);
2029 TAP_LOG(ERR, "Failed to probe %s", name);
2032 eth_dev->dev_ops = &ops;
2033 eth_dev->device = &dev->device;
2034 rte_eth_dev_probing_finish(eth_dev);
2038 /* use tun%d which causes kernel to choose next available */
2039 strlcpy(tun_name, DEFAULT_TUN_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2041 if (params && (params[0] != '\0')) {
2042 TAP_LOG(DEBUG, "parameters (%s)", params);
2044 kvlist = rte_kvargs_parse(params, valid_arguments);
2046 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2047 ret = rte_kvargs_process(kvlist,
2049 &set_interface_name,
2057 pmd_link.link_speed = ETH_SPEED_NUM_10G;
2059 TAP_LOG(DEBUG, "Initializing pmd_tun for %s", name);
2061 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0,
2062 ETH_TUNTAP_TYPE_TUN);
2066 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2069 rte_kvargs_free(kvlist);
2074 /* Request queue file descriptors from secondary to primary. */
2076 tap_mp_attach_queues(const char *port_name, struct rte_eth_dev *dev)
2079 struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};
2080 struct rte_mp_msg request, *reply;
2081 struct rte_mp_reply replies;
2082 struct ipc_queues *request_param = (struct ipc_queues *)request.param;
2083 struct ipc_queues *reply_param;
2084 struct pmd_process_private *process_private = dev->process_private;
2085 int queue, fd_iterator;
2087 /* Prepare the request */
2088 strlcpy(request.name, TAP_MP_KEY, sizeof(request.name));
2089 strlcpy(request_param->port_name, port_name,
2090 sizeof(request_param->port_name));
2091 request.len_param = sizeof(*request_param);
2092 /* Send request and receive reply */
2093 ret = rte_mp_request_sync(&request, &replies, &timeout);
2095 TAP_LOG(ERR, "Failed to request queues from primary: %d",
2099 reply = &replies.msgs[0];
2100 reply_param = (struct ipc_queues *)reply->param;
2101 TAP_LOG(DEBUG, "Received IPC reply for %s", reply_param->port_name);
2103 /* Attach the queues from received file descriptors */
2104 dev->data->nb_rx_queues = reply_param->rxq_count;
2105 dev->data->nb_tx_queues = reply_param->txq_count;
2107 for (queue = 0; queue < reply_param->rxq_count; queue++)
2108 process_private->rxq_fds[queue] = reply->fds[fd_iterator++];
2109 for (queue = 0; queue < reply_param->txq_count; queue++)
2110 process_private->txq_fds[queue] = reply->fds[fd_iterator++];
2115 /* Send the queue file descriptors from the primary process to secondary. */
2117 tap_mp_sync_queues(const struct rte_mp_msg *request, const void *peer)
2119 struct rte_eth_dev *dev;
2120 struct pmd_process_private *process_private;
2121 struct rte_mp_msg reply;
2122 const struct ipc_queues *request_param =
2123 (const struct ipc_queues *)request->param;
2124 struct ipc_queues *reply_param =
2125 (struct ipc_queues *)reply.param;
2130 /* Get requested port */
2131 TAP_LOG(DEBUG, "Received IPC request for %s", request_param->port_name);
2132 ret = rte_eth_dev_get_port_by_name(request_param->port_name, &port_id);
2134 TAP_LOG(ERR, "Failed to get port id for %s",
2135 request_param->port_name);
2138 dev = &rte_eth_devices[port_id];
2139 process_private = dev->process_private;
2141 /* Fill file descriptors for all queues */
2143 reply_param->rxq_count = 0;
2144 for (queue = 0; queue < dev->data->nb_rx_queues; queue++) {
2145 reply.fds[reply.num_fds++] = process_private->rxq_fds[queue];
2146 reply_param->rxq_count++;
2148 RTE_ASSERT(reply_param->rxq_count == dev->data->nb_rx_queues);
2149 RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
2150 RTE_ASSERT(reply.num_fds <= RTE_MP_MAX_FD_NUM);
2152 reply_param->txq_count = 0;
2153 for (queue = 0; queue < dev->data->nb_tx_queues; queue++) {
2154 reply.fds[reply.num_fds++] = process_private->txq_fds[queue];
2155 reply_param->txq_count++;
2159 strlcpy(reply.name, request->name, sizeof(reply.name));
2160 strlcpy(reply_param->port_name, request_param->port_name,
2161 sizeof(reply_param->port_name));
2162 reply.len_param = sizeof(*reply_param);
2163 if (rte_mp_reply(&reply, peer) < 0) {
2164 TAP_LOG(ERR, "Failed to reply an IPC request to sync queues");
2170 /* Open a TAP interface device.
2173 rte_pmd_tap_probe(struct rte_vdev_device *dev)
2175 const char *name, *params;
2177 struct rte_kvargs *kvlist = NULL;
2179 char tap_name[RTE_ETH_NAME_MAX_LEN];
2180 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2181 struct ether_addr user_mac = { .addr_bytes = {0} };
2182 struct rte_eth_dev *eth_dev;
2183 int tap_devices_count_increased = 0;
2185 strcpy(tuntap_name, "TAP");
2187 name = rte_vdev_device_name(dev);
2188 params = rte_vdev_device_args(dev);
2190 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
2191 eth_dev = rte_eth_dev_attach_secondary(name);
2193 TAP_LOG(ERR, "Failed to probe %s", name);
2196 eth_dev->dev_ops = &ops;
2197 eth_dev->device = &dev->device;
2198 eth_dev->rx_pkt_burst = pmd_rx_burst;
2199 eth_dev->tx_pkt_burst = pmd_tx_burst;
2200 if (!rte_eal_primary_proc_alive(NULL)) {
2201 TAP_LOG(ERR, "Primary process is missing");
2204 eth_dev->process_private = (struct pmd_process_private *)
2205 rte_zmalloc_socket(name,
2206 sizeof(struct pmd_process_private),
2207 RTE_CACHE_LINE_SIZE,
2208 eth_dev->device->numa_node);
2209 if (eth_dev->process_private == NULL) {
2211 "Failed to alloc memory for process private");
2215 ret = tap_mp_attach_queues(name, eth_dev);
2218 rte_eth_dev_probing_finish(eth_dev);
2222 speed = ETH_SPEED_NUM_10G;
2224 /* use tap%d which causes kernel to choose next available */
2225 strlcpy(tap_name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2226 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2228 if (params && (params[0] != '\0')) {
2229 TAP_LOG(DEBUG, "parameters (%s)", params);
2231 kvlist = rte_kvargs_parse(params, valid_arguments);
2233 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2234 ret = rte_kvargs_process(kvlist,
2236 &set_interface_name,
2242 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
2243 ret = rte_kvargs_process(kvlist,
2251 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
2252 ret = rte_kvargs_process(kvlist,
2261 pmd_link.link_speed = speed;
2263 TAP_LOG(DEBUG, "Initializing pmd_tap for %s", name);
2265 /* Register IPC feed callback */
2266 if (!tap_devices_count) {
2267 ret = rte_mp_action_register(TAP_MP_KEY, tap_mp_sync_queues);
2269 TAP_LOG(ERR, "%s: Failed to register IPC callback: %s",
2270 tuntap_name, strerror(rte_errno));
2274 tap_devices_count++;
2275 tap_devices_count_increased = 1;
2276 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac,
2277 ETH_TUNTAP_TYPE_TAP);
2281 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2283 if (tap_devices_count_increased == 1) {
2284 if (tap_devices_count == 1)
2285 rte_mp_action_unregister(TAP_MP_KEY);
2286 tap_devices_count--;
2289 rte_kvargs_free(kvlist);
2294 /* detach a TUNTAP device.
2297 rte_pmd_tap_remove(struct rte_vdev_device *dev)
2299 struct rte_eth_dev *eth_dev = NULL;
2300 struct pmd_internals *internals;
2301 struct pmd_process_private *process_private;
2304 /* find the ethdev entry */
2305 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
2309 /* mac_addrs must not be freed alone because part of dev_private */
2310 eth_dev->data->mac_addrs = NULL;
2312 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
2313 return rte_eth_dev_release_port(eth_dev);
2315 internals = eth_dev->data->dev_private;
2316 process_private = eth_dev->process_private;
2318 TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
2319 (internals->type == ETH_TUNTAP_TYPE_TAP) ? "TAP" : "TUN",
2322 if (internals->nlsk_fd) {
2323 tap_flow_flush(eth_dev, NULL);
2324 tap_flow_implicit_flush(internals, NULL);
2325 tap_nl_final(internals->nlsk_fd);
2327 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
2328 if (process_private->rxq_fds[i] != -1) {
2329 close(process_private->rxq_fds[i]);
2330 process_private->rxq_fds[i] = -1;
2332 if (process_private->txq_fds[i] != -1) {
2333 close(process_private->txq_fds[i]);
2334 process_private->txq_fds[i] = -1;
2338 close(internals->ioctl_sock);
2339 rte_free(eth_dev->process_private);
2340 if (tap_devices_count == 1)
2341 rte_mp_action_unregister(TAP_MP_KEY);
2342 tap_devices_count--;
2343 rte_eth_dev_release_port(eth_dev);
2345 if (internals->ka_fd != -1) {
2346 close(internals->ka_fd);
2347 internals->ka_fd = -1;
2352 static struct rte_vdev_driver pmd_tun_drv = {
2353 .probe = rte_pmd_tun_probe,
2354 .remove = rte_pmd_tap_remove,
2357 static struct rte_vdev_driver pmd_tap_drv = {
2358 .probe = rte_pmd_tap_probe,
2359 .remove = rte_pmd_tap_remove,
2362 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
2363 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
2364 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
2365 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
2366 ETH_TAP_IFACE_ARG "=<string> ");
2367 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
2368 ETH_TAP_IFACE_ARG "=<string> "
2369 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
2370 ETH_TAP_REMOTE_ARG "=<string>");
2373 RTE_INIT(tap_init_log)
2375 tap_logtype = rte_log_register("pmd.net.tap");
2376 if (tap_logtype >= 0)
2377 rte_log_set_level(tap_logtype, RTE_LOG_NOTICE);