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>
21 #include <rte_cycles.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 #define TAP_IOV_DEFAULT_MAX 1024
73 static int tap_devices_count;
75 static const char *valid_arguments[] = {
82 static volatile uint32_t tap_trigger; /* Rx trigger */
84 static struct rte_eth_link pmd_link = {
85 .link_speed = ETH_SPEED_NUM_10G,
86 .link_duplex = ETH_LINK_FULL_DUPLEX,
87 .link_status = ETH_LINK_DOWN,
88 .link_autoneg = ETH_LINK_FIXED,
92 tap_trigger_cb(int sig __rte_unused)
94 /* Valid trigger values are nonzero */
95 tap_trigger = (tap_trigger + 1) | 0x80000000;
98 /* Specifies on what netdevices the ioctl should be applied */
105 /* Message header to synchronize queues via IPC */
107 char port_name[RTE_DEV_NAME_MAX_LEN];
111 * The file descriptors are in the dedicated part
112 * of the Unix message to be translated by the kernel.
116 static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
119 * Tun/Tap allocation routine
122 * Pointer to private structure.
124 * @param[in] is_keepalive
128 * -1 on failure, fd on success
131 tun_alloc(struct pmd_internals *pmd, int is_keepalive)
134 #ifdef IFF_MULTI_QUEUE
135 unsigned int features;
137 int fd, signo, flags;
139 memset(&ifr, 0, sizeof(struct ifreq));
142 * Do not set IFF_NO_PI as packet information header will be needed
143 * to check if a received packet has been truncated.
145 ifr.ifr_flags = (pmd->type == ETH_TUNTAP_TYPE_TAP) ?
146 IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
147 strlcpy(ifr.ifr_name, pmd->name, IFNAMSIZ);
149 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
151 TAP_LOG(ERR, "Unable to open %s interface", TUN_TAP_DEV_PATH);
155 #ifdef IFF_MULTI_QUEUE
156 /* Grab the TUN features to verify we can work multi-queue */
157 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
158 TAP_LOG(ERR, "unable to get TUN/TAP features");
161 TAP_LOG(DEBUG, "%s Features %08x", TUN_TAP_DEV_PATH, features);
163 if (features & IFF_MULTI_QUEUE) {
164 TAP_LOG(DEBUG, " Multi-queue support for %d queues",
165 RTE_PMD_TAP_MAX_QUEUES);
166 ifr.ifr_flags |= IFF_MULTI_QUEUE;
170 ifr.ifr_flags |= IFF_ONE_QUEUE;
171 TAP_LOG(DEBUG, " Single queue only support");
174 /* Set the TUN/TAP configuration and set the name if needed */
175 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
176 TAP_LOG(WARNING, "Unable to set TUNSETIFF for %s: %s",
177 ifr.ifr_name, strerror(errno));
182 * Name passed to kernel might be wildcard like dtun%d
183 * and need to find the resulting device.
185 TAP_LOG(DEBUG, "Device name is '%s'", ifr.ifr_name);
186 strlcpy(pmd->name, ifr.ifr_name, RTE_ETH_NAME_MAX_LEN);
190 * Detach the TUN/TAP keep-alive queue
191 * to avoid traffic through it
193 ifr.ifr_flags = IFF_DETACH_QUEUE;
194 if (ioctl(fd, TUNSETQUEUE, (void *)&ifr) < 0) {
196 "Unable to detach keep-alive queue for %s: %s",
197 ifr.ifr_name, strerror(errno));
202 flags = fcntl(fd, F_GETFL);
205 "Unable to get %s current flags\n",
210 /* Always set the file descriptor to non-blocking */
212 if (fcntl(fd, F_SETFL, flags) < 0) {
214 "Unable to set %s to nonblocking: %s",
215 ifr.ifr_name, strerror(errno));
219 /* Find a free realtime signal */
220 for (signo = SIGRTMIN + 1; signo < SIGRTMAX; signo++) {
223 if (sigaction(signo, NULL, &sa) == -1) {
225 "Unable to get current rt-signal %d handler",
230 /* Already have the handler we want on this signal */
231 if (sa.sa_handler == tap_trigger_cb)
234 /* Is handler in use by application */
235 if (sa.sa_handler != SIG_DFL) {
237 "Skipping used rt-signal %d", signo);
241 sa = (struct sigaction) {
242 .sa_flags = SA_RESTART,
243 .sa_handler = tap_trigger_cb,
246 if (sigaction(signo, &sa, NULL) == -1) {
248 "Unable to set rt-signal %d handler\n", signo);
252 /* Found a good signal to use */
254 "Using rt-signal %d", signo);
258 if (signo == SIGRTMAX) {
259 TAP_LOG(WARNING, "All rt-signals are in use\n");
261 /* Disable trigger globally in case of error */
263 TAP_LOG(NOTICE, "No Rx trigger signal available\n");
265 /* Enable signal on file descriptor */
266 if (fcntl(fd, F_SETSIG, signo) < 0) {
267 TAP_LOG(WARNING, "Unable to set signo %d for fd %d: %s",
268 signo, fd, strerror(errno));
271 if (fcntl(fd, F_SETFL, flags | O_ASYNC) < 0) {
272 TAP_LOG(WARNING, "Unable to set fcntl flags: %s",
277 if (fcntl(fd, F_SETOWN, getpid()) < 0) {
278 TAP_LOG(WARNING, "Unable to set fcntl owner: %s",
292 tap_verify_csum(struct rte_mbuf *mbuf)
294 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
295 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
296 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
297 unsigned int l2_len = sizeof(struct rte_ether_hdr);
303 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
305 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
307 /* Don't verify checksum for packets with discontinuous L2 header */
308 if (unlikely(l2_len + sizeof(struct rte_ipv4_hdr) >
309 rte_pktmbuf_data_len(mbuf)))
311 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
312 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
313 struct rte_ipv4_hdr *iph = l3_hdr;
315 /* ihl contains the number of 4-byte words in the header */
316 l3_len = 4 * (iph->version_ihl & 0xf);
317 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
319 /* check that the total length reported by header is not
320 * greater than the total received size
322 if (l2_len + rte_be_to_cpu_16(iph->total_length) >
323 rte_pktmbuf_data_len(mbuf))
326 cksum = ~rte_raw_cksum(iph, l3_len);
327 mbuf->ol_flags |= cksum ?
328 PKT_RX_IP_CKSUM_BAD :
329 PKT_RX_IP_CKSUM_GOOD;
330 } else if (l3 == RTE_PTYPE_L3_IPV6) {
331 struct rte_ipv6_hdr *iph = l3_hdr;
333 l3_len = sizeof(struct rte_ipv6_hdr);
334 /* check that the total length reported by header is not
335 * greater than the total received size
337 if (l2_len + l3_len + rte_be_to_cpu_16(iph->payload_len) >
338 rte_pktmbuf_data_len(mbuf))
341 /* IPv6 extensions are not supported */
344 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
345 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
346 /* Don't verify checksum for multi-segment packets. */
347 if (mbuf->nb_segs > 1)
349 if (l3 == RTE_PTYPE_L3_IPV4)
350 cksum = ~rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr);
351 else if (l3 == RTE_PTYPE_L3_IPV6)
352 cksum = ~rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr);
353 mbuf->ol_flags |= cksum ?
354 PKT_RX_L4_CKSUM_BAD :
355 PKT_RX_L4_CKSUM_GOOD;
360 tap_rx_offload_get_port_capa(void)
363 * No specific port Rx offload capabilities.
369 tap_rx_offload_get_queue_capa(void)
371 return DEV_RX_OFFLOAD_SCATTER |
372 DEV_RX_OFFLOAD_IPV4_CKSUM |
373 DEV_RX_OFFLOAD_UDP_CKSUM |
374 DEV_RX_OFFLOAD_TCP_CKSUM;
378 tap_rxq_pool_free(struct rte_mbuf *pool)
380 struct rte_mbuf *mbuf = pool;
381 uint16_t nb_segs = 1;
390 pool->nb_segs = nb_segs;
391 rte_pktmbuf_free(pool);
394 /* Callback to handle the rx burst of packets to the correct interface and
395 * file descriptor(s) in a multi-queue setup.
398 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
400 struct rx_queue *rxq = queue;
401 struct pmd_process_private *process_private;
403 unsigned long num_rx_bytes = 0;
404 uint32_t trigger = tap_trigger;
406 if (trigger == rxq->trigger_seen)
409 process_private = rte_eth_devices[rxq->in_port].process_private;
410 for (num_rx = 0; num_rx < nb_pkts; ) {
411 struct rte_mbuf *mbuf = rxq->pool;
412 struct rte_mbuf *seg = NULL;
413 struct rte_mbuf *new_tail = NULL;
414 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
417 len = readv(process_private->rxq_fds[rxq->queue_id],
419 1 + (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
420 rxq->nb_rx_desc : 1));
421 if (len < (int)sizeof(struct tun_pi))
424 /* Packet couldn't fit in the provided mbuf */
425 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
426 rxq->stats.ierrors++;
430 len -= sizeof(struct tun_pi);
433 mbuf->port = rxq->in_port;
435 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
437 if (unlikely(!buf)) {
438 rxq->stats.rx_nombuf++;
439 /* No new buf has been allocated: do nothing */
440 if (!new_tail || !seg)
444 tap_rxq_pool_free(mbuf);
448 seg = seg ? seg->next : mbuf;
449 if (rxq->pool == mbuf)
452 new_tail->next = buf;
454 new_tail->next = seg->next;
456 /* iovecs[0] is reserved for packet info (pi) */
457 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
458 buf->buf_len - data_off;
459 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
460 (char *)buf->buf_addr + data_off;
462 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
463 seg->data_off = data_off;
465 len -= seg->data_len;
469 /* First segment has headroom, not the others */
473 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
475 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
476 tap_verify_csum(mbuf);
478 /* account for the receive frame */
479 bufs[num_rx++] = mbuf;
480 num_rx_bytes += mbuf->pkt_len;
483 rxq->stats.ipackets += num_rx;
484 rxq->stats.ibytes += num_rx_bytes;
486 if (trigger && num_rx < nb_pkts)
487 rxq->trigger_seen = trigger;
493 tap_tx_offload_get_port_capa(void)
496 * No specific port Tx offload capabilities.
502 tap_tx_offload_get_queue_capa(void)
504 return DEV_TX_OFFLOAD_MULTI_SEGS |
505 DEV_TX_OFFLOAD_IPV4_CKSUM |
506 DEV_TX_OFFLOAD_UDP_CKSUM |
507 DEV_TX_OFFLOAD_TCP_CKSUM |
508 DEV_TX_OFFLOAD_TCP_TSO;
511 /* Finalize l4 checksum calculation */
513 tap_tx_l4_cksum(uint16_t *l4_cksum, uint16_t l4_phdr_cksum,
514 uint32_t l4_raw_cksum)
519 cksum = __rte_raw_cksum_reduce(l4_raw_cksum);
520 cksum += l4_phdr_cksum;
522 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
523 cksum = (~cksum) & 0xffff;
530 /* Accumaulate L4 raw checksums */
532 tap_tx_l4_add_rcksum(char *l4_data, unsigned int l4_len, uint16_t *l4_cksum,
533 uint32_t *l4_raw_cksum)
535 if (l4_cksum == NULL)
538 *l4_raw_cksum = __rte_raw_cksum(l4_data, l4_len, *l4_raw_cksum);
541 /* L3 and L4 pseudo headers checksum offloads */
543 tap_tx_l3_cksum(char *packet, uint64_t ol_flags, unsigned int l2_len,
544 unsigned int l3_len, unsigned int l4_len, uint16_t **l4_cksum,
545 uint16_t *l4_phdr_cksum, uint32_t *l4_raw_cksum)
547 void *l3_hdr = packet + l2_len;
549 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
550 struct rte_ipv4_hdr *iph = l3_hdr;
553 iph->hdr_checksum = 0;
554 cksum = rte_raw_cksum(iph, l3_len);
555 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
557 if (ol_flags & PKT_TX_L4_MASK) {
560 l4_hdr = packet + l2_len + l3_len;
561 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
562 *l4_cksum = &((struct rte_udp_hdr *)l4_hdr)->dgram_cksum;
563 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
564 *l4_cksum = &((struct rte_tcp_hdr *)l4_hdr)->cksum;
568 if (ol_flags & PKT_TX_IPV4)
569 *l4_phdr_cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
571 *l4_phdr_cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
572 *l4_raw_cksum = __rte_raw_cksum(l4_hdr, l4_len, 0);
577 tap_write_mbufs(struct tx_queue *txq, uint16_t num_mbufs,
578 struct rte_mbuf **pmbufs,
579 uint16_t *num_packets, unsigned long *num_tx_bytes)
583 struct pmd_process_private *process_private;
585 process_private = rte_eth_devices[txq->out_port].process_private;
587 for (i = 0; i < num_mbufs; i++) {
588 struct rte_mbuf *mbuf = pmbufs[i];
589 struct iovec iovecs[mbuf->nb_segs + 2];
590 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
591 struct rte_mbuf *seg = mbuf;
592 char m_copy[mbuf->data_len];
596 int k; /* current index in iovecs for copying segments */
597 uint16_t seg_len; /* length of first segment */
599 uint16_t *l4_cksum; /* l4 checksum (pseudo header + payload) */
600 uint32_t l4_raw_cksum = 0; /* TCP/UDP payload raw checksum */
601 uint16_t l4_phdr_cksum = 0; /* TCP/UDP pseudo header checksum */
602 uint16_t is_cksum = 0; /* in case cksum should be offloaded */
605 if (txq->type == ETH_TUNTAP_TYPE_TUN) {
607 * TUN and TAP are created with IFF_NO_PI disabled.
608 * For TUN PMD this mandatory as fields are used by
609 * Kernel tun.c to determine whether its IP or non IP
612 * The logic fetches the first byte of data from mbuf
613 * then compares whether its v4 or v6. If first byte
614 * is 4 or 6, then protocol field is updated.
616 char *buff_data = rte_pktmbuf_mtod(seg, void *);
617 proto = (*buff_data & 0xf0);
618 pi.proto = (proto == 0x40) ?
619 rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4) :
621 rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6) :
626 iovecs[k].iov_base = π
627 iovecs[k].iov_len = sizeof(pi);
630 nb_segs = mbuf->nb_segs;
632 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
633 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
634 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
637 /* Support only packets with at least layer 4
638 * header included in the first segment
640 seg_len = rte_pktmbuf_data_len(mbuf);
641 l234_hlen = mbuf->l2_len + mbuf->l3_len + mbuf->l4_len;
642 if (seg_len < l234_hlen)
645 /* To change checksums, work on a * copy of l2, l3
646 * headers + l4 pseudo header
648 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
650 tap_tx_l3_cksum(m_copy, mbuf->ol_flags,
651 mbuf->l2_len, mbuf->l3_len, mbuf->l4_len,
652 &l4_cksum, &l4_phdr_cksum,
654 iovecs[k].iov_base = m_copy;
655 iovecs[k].iov_len = l234_hlen;
658 /* Update next iovecs[] beyond l2, l3, l4 headers */
659 if (seg_len > l234_hlen) {
660 iovecs[k].iov_len = seg_len - l234_hlen;
662 rte_pktmbuf_mtod(seg, char *) +
664 tap_tx_l4_add_rcksum(iovecs[k].iov_base,
665 iovecs[k].iov_len, l4_cksum,
673 for (j = k; j <= nb_segs; j++) {
674 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
675 iovecs[j].iov_base = rte_pktmbuf_mtod(seg, void *);
677 tap_tx_l4_add_rcksum(iovecs[j].iov_base,
678 iovecs[j].iov_len, l4_cksum,
684 tap_tx_l4_cksum(l4_cksum, l4_phdr_cksum, l4_raw_cksum);
686 /* copy the tx frame data */
687 n = writev(process_private->txq_fds[txq->queue_id], iovecs, j);
692 (*num_tx_bytes) += rte_pktmbuf_pkt_len(mbuf);
697 /* Callback to handle sending packets from the tap interface
700 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
702 struct tx_queue *txq = queue;
704 uint16_t num_packets = 0;
705 unsigned long num_tx_bytes = 0;
709 if (unlikely(nb_pkts == 0))
712 struct rte_mbuf *gso_mbufs[MAX_GSO_MBUFS];
713 max_size = *txq->mtu + (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + 4);
714 for (i = 0; i < nb_pkts; i++) {
715 struct rte_mbuf *mbuf_in = bufs[num_tx];
716 struct rte_mbuf **mbuf;
717 uint16_t num_mbufs = 0;
718 uint16_t tso_segsz = 0;
724 tso = mbuf_in->ol_flags & PKT_TX_TCP_SEG;
726 struct rte_gso_ctx *gso_ctx = &txq->gso_ctx;
728 /* TCP segmentation implies TCP checksum offload */
729 mbuf_in->ol_flags |= PKT_TX_TCP_CKSUM;
731 /* gso size is calculated without RTE_ETHER_CRC_LEN */
732 hdrs_len = mbuf_in->l2_len + mbuf_in->l3_len +
734 tso_segsz = mbuf_in->tso_segsz + hdrs_len;
735 if (unlikely(tso_segsz == hdrs_len) ||
736 tso_segsz > *txq->mtu) {
740 gso_ctx->gso_size = tso_segsz;
741 /* 'mbuf_in' packet to segment */
742 num_tso_mbufs = rte_gso_segment(mbuf_in,
743 gso_ctx, /* gso control block */
744 (struct rte_mbuf **)&gso_mbufs, /* out mbufs */
745 RTE_DIM(gso_mbufs)); /* max tso mbufs */
747 /* ret contains the number of new created mbufs */
748 if (num_tso_mbufs < 0)
752 num_mbufs = num_tso_mbufs;
754 /* stats.errs will be incremented */
755 if (rte_pktmbuf_pkt_len(mbuf_in) > max_size)
758 /* ret 0 indicates no new mbufs were created */
764 ret = tap_write_mbufs(txq, num_mbufs, mbuf,
765 &num_packets, &num_tx_bytes);
769 if (num_tso_mbufs > 0)
770 rte_pktmbuf_free_bulk(mbuf, num_tso_mbufs);
774 /* free original mbuf */
775 rte_pktmbuf_free(mbuf_in);
777 if (num_tso_mbufs > 0)
778 rte_pktmbuf_free_bulk(mbuf, num_tso_mbufs);
781 txq->stats.opackets += num_packets;
782 txq->stats.errs += nb_pkts - num_tx;
783 txq->stats.obytes += num_tx_bytes;
789 tap_ioctl_req2str(unsigned long request)
793 return "SIOCSIFFLAGS";
795 return "SIOCGIFFLAGS";
797 return "SIOCGIFHWADDR";
799 return "SIOCSIFHWADDR";
807 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
808 struct ifreq *ifr, int set, enum ioctl_mode mode)
810 short req_flags = ifr->ifr_flags;
811 int remote = pmd->remote_if_index &&
812 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
814 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
817 * If there is a remote netdevice, apply ioctl on it, then apply it on
822 strlcpy(ifr->ifr_name, pmd->remote_iface, IFNAMSIZ);
823 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
824 strlcpy(ifr->ifr_name, pmd->name, IFNAMSIZ);
827 /* fetch current flags to leave other flags untouched */
828 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
831 ifr->ifr_flags |= req_flags;
833 ifr->ifr_flags &= ~req_flags;
841 TAP_LOG(WARNING, "%s: ioctl() called with wrong arg",
845 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
847 if (remote-- && mode == LOCAL_AND_REMOTE)
852 TAP_LOG(DEBUG, "%s(%s) failed: %s(%d)", ifr->ifr_name,
853 tap_ioctl_req2str(request), strerror(errno), errno);
858 tap_link_set_down(struct rte_eth_dev *dev)
860 struct pmd_internals *pmd = dev->data->dev_private;
861 struct ifreq ifr = { .ifr_flags = IFF_UP };
863 dev->data->dev_link.link_status = ETH_LINK_DOWN;
864 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
868 tap_link_set_up(struct rte_eth_dev *dev)
870 struct pmd_internals *pmd = dev->data->dev_private;
871 struct ifreq ifr = { .ifr_flags = IFF_UP };
873 dev->data->dev_link.link_status = ETH_LINK_UP;
874 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
878 tap_dev_start(struct rte_eth_dev *dev)
882 err = tap_intr_handle_set(dev, 1);
886 err = tap_link_set_up(dev);
890 for (i = 0; i < dev->data->nb_tx_queues; i++)
891 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
892 for (i = 0; i < dev->data->nb_rx_queues; i++)
893 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
898 /* This function gets called when the current port gets stopped.
901 tap_dev_stop(struct rte_eth_dev *dev)
905 for (i = 0; i < dev->data->nb_tx_queues; i++)
906 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
907 for (i = 0; i < dev->data->nb_rx_queues; i++)
908 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
910 tap_intr_handle_set(dev, 0);
911 tap_link_set_down(dev);
915 tap_dev_configure(struct rte_eth_dev *dev)
917 struct pmd_internals *pmd = dev->data->dev_private;
919 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
921 "%s: number of rx queues %d exceeds max num of queues %d",
923 dev->data->nb_rx_queues,
924 RTE_PMD_TAP_MAX_QUEUES);
927 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
929 "%s: number of tx queues %d exceeds max num of queues %d",
931 dev->data->nb_tx_queues,
932 RTE_PMD_TAP_MAX_QUEUES);
936 TAP_LOG(INFO, "%s: %s: TX configured queues number: %u",
937 dev->device->name, pmd->name, dev->data->nb_tx_queues);
939 TAP_LOG(INFO, "%s: %s: RX configured queues number: %u",
940 dev->device->name, pmd->name, dev->data->nb_rx_queues);
946 tap_dev_speed_capa(void)
948 uint32_t speed = pmd_link.link_speed;
951 if (speed >= ETH_SPEED_NUM_10M)
952 capa |= ETH_LINK_SPEED_10M;
953 if (speed >= ETH_SPEED_NUM_100M)
954 capa |= ETH_LINK_SPEED_100M;
955 if (speed >= ETH_SPEED_NUM_1G)
956 capa |= ETH_LINK_SPEED_1G;
957 if (speed >= ETH_SPEED_NUM_5G)
958 capa |= ETH_LINK_SPEED_2_5G;
959 if (speed >= ETH_SPEED_NUM_5G)
960 capa |= ETH_LINK_SPEED_5G;
961 if (speed >= ETH_SPEED_NUM_10G)
962 capa |= ETH_LINK_SPEED_10G;
963 if (speed >= ETH_SPEED_NUM_20G)
964 capa |= ETH_LINK_SPEED_20G;
965 if (speed >= ETH_SPEED_NUM_25G)
966 capa |= ETH_LINK_SPEED_25G;
967 if (speed >= ETH_SPEED_NUM_40G)
968 capa |= ETH_LINK_SPEED_40G;
969 if (speed >= ETH_SPEED_NUM_50G)
970 capa |= ETH_LINK_SPEED_50G;
971 if (speed >= ETH_SPEED_NUM_56G)
972 capa |= ETH_LINK_SPEED_56G;
973 if (speed >= ETH_SPEED_NUM_100G)
974 capa |= ETH_LINK_SPEED_100G;
980 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
982 struct pmd_internals *internals = dev->data->dev_private;
984 dev_info->if_index = internals->if_index;
985 dev_info->max_mac_addrs = 1;
986 dev_info->max_rx_pktlen = (uint32_t)RTE_ETHER_MAX_VLAN_FRAME_LEN;
987 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
988 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
989 dev_info->min_rx_bufsize = 0;
990 dev_info->speed_capa = tap_dev_speed_capa();
991 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
992 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
993 dev_info->rx_queue_offload_capa;
994 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
995 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
996 dev_info->tx_queue_offload_capa;
997 dev_info->hash_key_size = TAP_RSS_HASH_KEY_SIZE;
999 * limitation: TAP supports all of IP, UDP and TCP hash
1000 * functions together and not in partial combinations
1002 dev_info->flow_type_rss_offloads = ~TAP_RSS_HF_MASK;
1008 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
1010 unsigned int i, imax;
1011 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
1012 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
1013 unsigned long rx_nombuf = 0, ierrors = 0;
1014 const struct pmd_internals *pmd = dev->data->dev_private;
1016 /* rx queue statistics */
1017 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
1018 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
1019 for (i = 0; i < imax; i++) {
1020 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
1021 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
1022 rx_total += tap_stats->q_ipackets[i];
1023 rx_bytes_total += tap_stats->q_ibytes[i];
1024 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
1025 ierrors += pmd->rxq[i].stats.ierrors;
1028 /* tx queue statistics */
1029 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
1030 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
1032 for (i = 0; i < imax; i++) {
1033 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
1034 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
1035 tx_total += tap_stats->q_opackets[i];
1036 tx_err_total += pmd->txq[i].stats.errs;
1037 tx_bytes_total += tap_stats->q_obytes[i];
1040 tap_stats->ipackets = rx_total;
1041 tap_stats->ibytes = rx_bytes_total;
1042 tap_stats->ierrors = ierrors;
1043 tap_stats->rx_nombuf = rx_nombuf;
1044 tap_stats->opackets = tx_total;
1045 tap_stats->oerrors = tx_err_total;
1046 tap_stats->obytes = tx_bytes_total;
1051 tap_stats_reset(struct rte_eth_dev *dev)
1054 struct pmd_internals *pmd = dev->data->dev_private;
1056 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1057 pmd->rxq[i].stats.ipackets = 0;
1058 pmd->rxq[i].stats.ibytes = 0;
1059 pmd->rxq[i].stats.ierrors = 0;
1060 pmd->rxq[i].stats.rx_nombuf = 0;
1062 pmd->txq[i].stats.opackets = 0;
1063 pmd->txq[i].stats.errs = 0;
1064 pmd->txq[i].stats.obytes = 0;
1071 tap_dev_close(struct rte_eth_dev *dev)
1074 struct pmd_internals *internals = dev->data->dev_private;
1075 struct pmd_process_private *process_private = dev->process_private;
1076 struct rx_queue *rxq;
1078 tap_link_set_down(dev);
1079 if (internals->nlsk_fd != -1) {
1080 tap_flow_flush(dev, NULL);
1081 tap_flow_implicit_flush(internals, NULL);
1082 tap_nl_final(internals->nlsk_fd);
1083 internals->nlsk_fd = -1;
1086 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1087 if (process_private->rxq_fds[i] != -1) {
1088 rxq = &internals->rxq[i];
1089 close(process_private->rxq_fds[i]);
1090 process_private->rxq_fds[i] = -1;
1091 tap_rxq_pool_free(rxq->pool);
1092 rte_free(rxq->iovecs);
1096 if (process_private->txq_fds[i] != -1) {
1097 close(process_private->txq_fds[i]);
1098 process_private->txq_fds[i] = -1;
1102 if (internals->remote_if_index) {
1103 /* Restore initial remote state */
1104 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
1105 &internals->remote_initial_flags);
1108 if (internals->ka_fd != -1) {
1109 close(internals->ka_fd);
1110 internals->ka_fd = -1;
1113 * Since TUN device has no more opened file descriptors
1114 * it will be removed from kernel
1119 tap_rx_queue_release(void *queue)
1121 struct rx_queue *rxq = queue;
1122 struct pmd_process_private *process_private;
1126 process_private = rte_eth_devices[rxq->in_port].process_private;
1127 if (process_private->rxq_fds[rxq->queue_id] != -1) {
1128 close(process_private->rxq_fds[rxq->queue_id]);
1129 process_private->rxq_fds[rxq->queue_id] = -1;
1130 tap_rxq_pool_free(rxq->pool);
1131 rte_free(rxq->iovecs);
1138 tap_tx_queue_release(void *queue)
1140 struct tx_queue *txq = queue;
1141 struct pmd_process_private *process_private;
1145 process_private = rte_eth_devices[txq->out_port].process_private;
1147 if (process_private->txq_fds[txq->queue_id] != -1) {
1148 close(process_private->txq_fds[txq->queue_id]);
1149 process_private->txq_fds[txq->queue_id] = -1;
1154 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
1156 struct rte_eth_link *dev_link = &dev->data->dev_link;
1157 struct pmd_internals *pmd = dev->data->dev_private;
1158 struct ifreq ifr = { .ifr_flags = 0 };
1160 if (pmd->remote_if_index) {
1161 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
1162 if (!(ifr.ifr_flags & IFF_UP) ||
1163 !(ifr.ifr_flags & IFF_RUNNING)) {
1164 dev_link->link_status = ETH_LINK_DOWN;
1168 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
1169 dev_link->link_status =
1170 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
1177 tap_promisc_enable(struct rte_eth_dev *dev)
1179 struct pmd_internals *pmd = dev->data->dev_private;
1180 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1183 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1187 if (pmd->remote_if_index && !pmd->flow_isolate) {
1188 dev->data->promiscuous = 1;
1189 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
1191 /* Rollback promisc flag */
1192 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1194 * rte_eth_dev_promiscuous_enable() rollback
1195 * dev->data->promiscuous in the case of failure.
1205 tap_promisc_disable(struct rte_eth_dev *dev)
1207 struct pmd_internals *pmd = dev->data->dev_private;
1208 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1211 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1215 if (pmd->remote_if_index && !pmd->flow_isolate) {
1216 dev->data->promiscuous = 0;
1217 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
1219 /* Rollback promisc flag */
1220 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1222 * rte_eth_dev_promiscuous_disable() rollback
1223 * dev->data->promiscuous in the case of failure.
1233 tap_allmulti_enable(struct rte_eth_dev *dev)
1235 struct pmd_internals *pmd = dev->data->dev_private;
1236 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1239 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1243 if (pmd->remote_if_index && !pmd->flow_isolate) {
1244 dev->data->all_multicast = 1;
1245 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
1247 /* Rollback allmulti flag */
1248 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1250 * rte_eth_dev_allmulticast_enable() rollback
1251 * dev->data->all_multicast in the case of failure.
1261 tap_allmulti_disable(struct rte_eth_dev *dev)
1263 struct pmd_internals *pmd = dev->data->dev_private;
1264 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1267 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1271 if (pmd->remote_if_index && !pmd->flow_isolate) {
1272 dev->data->all_multicast = 0;
1273 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
1275 /* Rollback allmulti flag */
1276 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1278 * rte_eth_dev_allmulticast_disable() rollback
1279 * dev->data->all_multicast in the case of failure.
1289 tap_mac_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1291 struct pmd_internals *pmd = dev->data->dev_private;
1292 enum ioctl_mode mode = LOCAL_ONLY;
1296 if (pmd->type == ETH_TUNTAP_TYPE_TUN) {
1297 TAP_LOG(ERR, "%s: can't MAC address for TUN",
1302 if (rte_is_zero_ether_addr(mac_addr)) {
1303 TAP_LOG(ERR, "%s: can't set an empty MAC address",
1307 /* Check the actual current MAC address on the tap netdevice */
1308 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
1311 if (rte_is_same_ether_addr(
1312 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1315 /* Check the current MAC address on the remote */
1316 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
1319 if (!rte_is_same_ether_addr(
1320 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1322 mode = LOCAL_AND_REMOTE;
1323 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1324 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, RTE_ETHER_ADDR_LEN);
1325 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
1328 rte_memcpy(&pmd->eth_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1329 if (pmd->remote_if_index && !pmd->flow_isolate) {
1330 /* Replace MAC redirection rule after a MAC change */
1331 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
1334 "%s: Couldn't delete MAC redirection rule",
1338 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
1341 "%s: Couldn't add MAC redirection rule",
1351 tap_gso_ctx_setup(struct rte_gso_ctx *gso_ctx, struct rte_eth_dev *dev)
1357 * Create private mbuf pool with TAP_GSO_MBUF_SEG_SIZE bytes
1358 * size per mbuf use this pool for both direct and indirect mbufs
1361 struct rte_mempool *mp; /* Mempool for GSO packets */
1363 /* initialize GSO context */
1364 gso_types = DEV_TX_OFFLOAD_TCP_TSO;
1365 snprintf(pool_name, sizeof(pool_name), "mp_%s", dev->device->name);
1366 mp = rte_mempool_lookup((const char *)pool_name);
1368 mp = rte_pktmbuf_pool_create(pool_name, TAP_GSO_MBUFS_NUM,
1369 TAP_GSO_MBUF_CACHE_SIZE, 0,
1370 RTE_PKTMBUF_HEADROOM + TAP_GSO_MBUF_SEG_SIZE,
1373 struct pmd_internals *pmd = dev->data->dev_private;
1376 "%s: failed to create mbuf pool for device %s\n",
1377 pmd->name, dev->device->name);
1382 gso_ctx->direct_pool = mp;
1383 gso_ctx->indirect_pool = mp;
1384 gso_ctx->gso_types = gso_types;
1385 gso_ctx->gso_size = 0; /* gso_size is set in tx_burst() per packet */
1392 tap_setup_queue(struct rte_eth_dev *dev,
1393 struct pmd_internals *internals,
1401 struct pmd_internals *pmd = dev->data->dev_private;
1402 struct pmd_process_private *process_private = dev->process_private;
1403 struct rx_queue *rx = &internals->rxq[qid];
1404 struct tx_queue *tx = &internals->txq[qid];
1405 struct rte_gso_ctx *gso_ctx;
1408 fd = &process_private->rxq_fds[qid];
1409 other_fd = &process_private->txq_fds[qid];
1413 fd = &process_private->txq_fds[qid];
1414 other_fd = &process_private->rxq_fds[qid];
1416 gso_ctx = &tx->gso_ctx;
1419 /* fd for this queue already exists */
1420 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1421 pmd->name, *fd, dir, qid);
1423 } else if (*other_fd != -1) {
1424 /* Only other_fd exists. dup it */
1425 *fd = dup(*other_fd);
1428 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1431 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1432 pmd->name, *other_fd, dir, qid, *fd);
1434 /* Both RX and TX fds do not exist (equal -1). Create fd */
1435 *fd = tun_alloc(pmd, 0);
1437 *fd = -1; /* restore original value */
1438 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1441 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1442 pmd->name, dir, qid, *fd);
1445 tx->mtu = &dev->data->mtu;
1446 rx->rxmode = &dev->data->dev_conf.rxmode;
1448 ret = tap_gso_ctx_setup(gso_ctx, dev);
1453 tx->type = pmd->type;
1459 tap_rx_queue_setup(struct rte_eth_dev *dev,
1460 uint16_t rx_queue_id,
1461 uint16_t nb_rx_desc,
1462 unsigned int socket_id,
1463 const struct rte_eth_rxconf *rx_conf __rte_unused,
1464 struct rte_mempool *mp)
1466 struct pmd_internals *internals = dev->data->dev_private;
1467 struct pmd_process_private *process_private = dev->process_private;
1468 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1469 struct rte_mbuf **tmp = &rxq->pool;
1470 long iov_max = sysconf(_SC_IOV_MAX);
1474 "_SC_IOV_MAX is not defined. Using %d as default",
1475 TAP_IOV_DEFAULT_MAX);
1476 iov_max = TAP_IOV_DEFAULT_MAX;
1478 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1479 struct iovec (*iovecs)[nb_desc + 1];
1480 int data_off = RTE_PKTMBUF_HEADROOM;
1485 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1487 "nb_rx_queues %d too small or mempool NULL",
1488 dev->data->nb_rx_queues);
1493 rxq->trigger_seen = 1; /* force initial burst */
1494 rxq->in_port = dev->data->port_id;
1495 rxq->queue_id = rx_queue_id;
1496 rxq->nb_rx_desc = nb_desc;
1497 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1501 "%s: Couldn't allocate %d RX descriptors",
1502 dev->device->name, nb_desc);
1505 rxq->iovecs = iovecs;
1507 dev->data->rx_queues[rx_queue_id] = rxq;
1508 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1514 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1515 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1517 for (i = 1; i <= nb_desc; i++) {
1518 *tmp = rte_pktmbuf_alloc(rxq->mp);
1521 "%s: couldn't allocate memory for queue %d",
1522 dev->device->name, rx_queue_id);
1526 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1527 (*rxq->iovecs)[i].iov_base =
1528 (char *)(*tmp)->buf_addr + data_off;
1530 tmp = &(*tmp)->next;
1533 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1534 internals->name, rx_queue_id,
1535 process_private->rxq_fds[rx_queue_id]);
1540 tap_rxq_pool_free(rxq->pool);
1542 rte_free(rxq->iovecs);
1548 tap_tx_queue_setup(struct rte_eth_dev *dev,
1549 uint16_t tx_queue_id,
1550 uint16_t nb_tx_desc __rte_unused,
1551 unsigned int socket_id __rte_unused,
1552 const struct rte_eth_txconf *tx_conf)
1554 struct pmd_internals *internals = dev->data->dev_private;
1555 struct pmd_process_private *process_private = dev->process_private;
1556 struct tx_queue *txq;
1560 if (tx_queue_id >= dev->data->nb_tx_queues)
1562 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1563 txq = dev->data->tx_queues[tx_queue_id];
1564 txq->out_port = dev->data->port_id;
1565 txq->queue_id = tx_queue_id;
1567 offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1568 txq->csum = !!(offloads &
1569 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1570 DEV_TX_OFFLOAD_UDP_CKSUM |
1571 DEV_TX_OFFLOAD_TCP_CKSUM));
1573 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1577 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1578 internals->name, tx_queue_id,
1579 process_private->txq_fds[tx_queue_id],
1580 txq->csum ? "on" : "off");
1586 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1588 struct pmd_internals *pmd = dev->data->dev_private;
1589 struct ifreq ifr = { .ifr_mtu = mtu };
1592 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1594 dev->data->mtu = mtu;
1600 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1601 struct rte_ether_addr *mc_addr_set __rte_unused,
1602 uint32_t nb_mc_addr __rte_unused)
1605 * Nothing to do actually: the tap has no filtering whatsoever, every
1606 * packet is received.
1612 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1614 struct rte_eth_dev *dev = arg;
1615 struct pmd_internals *pmd = dev->data->dev_private;
1616 struct ifinfomsg *info = NLMSG_DATA(nh);
1618 if (nh->nlmsg_type != RTM_NEWLINK ||
1619 (info->ifi_index != pmd->if_index &&
1620 info->ifi_index != pmd->remote_if_index))
1622 return tap_link_update(dev, 0);
1626 tap_dev_intr_handler(void *cb_arg)
1628 struct rte_eth_dev *dev = cb_arg;
1629 struct pmd_internals *pmd = dev->data->dev_private;
1631 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1635 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1637 struct pmd_internals *pmd = dev->data->dev_private;
1640 /* In any case, disable interrupt if the conf is no longer there. */
1641 if (!dev->data->dev_conf.intr_conf.lsc) {
1642 if (pmd->intr_handle.fd != -1) {
1648 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1649 if (unlikely(pmd->intr_handle.fd == -1))
1651 return rte_intr_callback_register(
1652 &pmd->intr_handle, tap_dev_intr_handler, dev);
1657 ret = rte_intr_callback_unregister(&pmd->intr_handle,
1658 tap_dev_intr_handler, dev);
1661 } else if (ret == -EAGAIN) {
1664 TAP_LOG(ERR, "intr callback unregister failed: %d",
1670 tap_nl_final(pmd->intr_handle.fd);
1671 pmd->intr_handle.fd = -1;
1677 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1681 err = tap_lsc_intr_handle_set(dev, set);
1684 tap_rx_intr_vec_set(dev, 0);
1687 err = tap_rx_intr_vec_set(dev, set);
1689 tap_lsc_intr_handle_set(dev, 0);
1693 static const uint32_t*
1694 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1696 static const uint32_t ptypes[] = {
1697 RTE_PTYPE_INNER_L2_ETHER,
1698 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1699 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1700 RTE_PTYPE_INNER_L3_IPV4,
1701 RTE_PTYPE_INNER_L3_IPV4_EXT,
1702 RTE_PTYPE_INNER_L3_IPV6,
1703 RTE_PTYPE_INNER_L3_IPV6_EXT,
1704 RTE_PTYPE_INNER_L4_FRAG,
1705 RTE_PTYPE_INNER_L4_UDP,
1706 RTE_PTYPE_INNER_L4_TCP,
1707 RTE_PTYPE_INNER_L4_SCTP,
1709 RTE_PTYPE_L2_ETHER_VLAN,
1710 RTE_PTYPE_L2_ETHER_QINQ,
1712 RTE_PTYPE_L3_IPV4_EXT,
1713 RTE_PTYPE_L3_IPV6_EXT,
1725 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1726 struct rte_eth_fc_conf *fc_conf)
1728 fc_conf->mode = RTE_FC_NONE;
1733 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1734 struct rte_eth_fc_conf *fc_conf)
1736 if (fc_conf->mode != RTE_FC_NONE)
1742 * DPDK callback to update the RSS hash configuration.
1745 * Pointer to Ethernet device structure.
1746 * @param[in] rss_conf
1747 * RSS configuration data.
1750 * 0 on success, a negative errno value otherwise and rte_errno is set.
1753 tap_rss_hash_update(struct rte_eth_dev *dev,
1754 struct rte_eth_rss_conf *rss_conf)
1756 if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
1760 if (rss_conf->rss_key && rss_conf->rss_key_len) {
1762 * Currently TAP RSS key is hard coded
1763 * and cannot be updated
1766 "port %u RSS key cannot be updated",
1767 dev->data->port_id);
1775 tap_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1777 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1783 tap_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1785 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1791 tap_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1793 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1799 tap_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1801 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1805 static const struct eth_dev_ops ops = {
1806 .dev_start = tap_dev_start,
1807 .dev_stop = tap_dev_stop,
1808 .dev_close = tap_dev_close,
1809 .dev_configure = tap_dev_configure,
1810 .dev_infos_get = tap_dev_info,
1811 .rx_queue_setup = tap_rx_queue_setup,
1812 .tx_queue_setup = tap_tx_queue_setup,
1813 .rx_queue_start = tap_rx_queue_start,
1814 .tx_queue_start = tap_tx_queue_start,
1815 .rx_queue_stop = tap_rx_queue_stop,
1816 .tx_queue_stop = tap_tx_queue_stop,
1817 .rx_queue_release = tap_rx_queue_release,
1818 .tx_queue_release = tap_tx_queue_release,
1819 .flow_ctrl_get = tap_flow_ctrl_get,
1820 .flow_ctrl_set = tap_flow_ctrl_set,
1821 .link_update = tap_link_update,
1822 .dev_set_link_up = tap_link_set_up,
1823 .dev_set_link_down = tap_link_set_down,
1824 .promiscuous_enable = tap_promisc_enable,
1825 .promiscuous_disable = tap_promisc_disable,
1826 .allmulticast_enable = tap_allmulti_enable,
1827 .allmulticast_disable = tap_allmulti_disable,
1828 .mac_addr_set = tap_mac_set,
1829 .mtu_set = tap_mtu_set,
1830 .set_mc_addr_list = tap_set_mc_addr_list,
1831 .stats_get = tap_stats_get,
1832 .stats_reset = tap_stats_reset,
1833 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1834 .rss_hash_update = tap_rss_hash_update,
1835 .filter_ctrl = tap_dev_filter_ctrl,
1838 static const char *tuntap_types[ETH_TUNTAP_TYPE_MAX] = {
1839 "UNKNOWN", "TUN", "TAP"
1843 eth_dev_tap_create(struct rte_vdev_device *vdev, const char *tap_name,
1844 char *remote_iface, struct rte_ether_addr *mac_addr,
1845 enum rte_tuntap_type type)
1847 int numa_node = rte_socket_id();
1848 struct rte_eth_dev *dev;
1849 struct pmd_internals *pmd;
1850 struct pmd_process_private *process_private;
1851 const char *tuntap_name = tuntap_types[type];
1852 struct rte_eth_dev_data *data;
1856 TAP_LOG(DEBUG, "%s device on numa %u", tuntap_name, rte_socket_id());
1858 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1860 TAP_LOG(ERR, "%s Unable to allocate device struct",
1862 goto error_exit_nodev;
1865 process_private = (struct pmd_process_private *)
1866 rte_zmalloc_socket(tap_name, sizeof(struct pmd_process_private),
1867 RTE_CACHE_LINE_SIZE, dev->device->numa_node);
1869 if (process_private == NULL) {
1870 TAP_LOG(ERR, "Failed to alloc memory for process private");
1873 pmd = dev->data->dev_private;
1874 dev->process_private = process_private;
1876 strlcpy(pmd->name, tap_name, sizeof(pmd->name));
1881 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1882 if (pmd->ioctl_sock == -1) {
1884 "%s Unable to get a socket for management: %s",
1885 tuntap_name, strerror(errno));
1889 /* Setup some default values */
1891 data->dev_private = pmd;
1892 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1893 data->numa_node = numa_node;
1895 data->dev_link = pmd_link;
1896 data->mac_addrs = &pmd->eth_addr;
1897 /* Set the number of RX and TX queues */
1898 data->nb_rx_queues = 0;
1899 data->nb_tx_queues = 0;
1901 dev->dev_ops = &ops;
1902 dev->rx_pkt_burst = pmd_rx_burst;
1903 dev->tx_pkt_burst = pmd_tx_burst;
1905 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1906 pmd->intr_handle.fd = -1;
1907 dev->intr_handle = &pmd->intr_handle;
1909 /* Presetup the fds to -1 as being not valid */
1910 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1911 process_private->rxq_fds[i] = -1;
1912 process_private->txq_fds[i] = -1;
1915 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1916 if (rte_is_zero_ether_addr(mac_addr))
1917 rte_eth_random_addr((uint8_t *)&pmd->eth_addr);
1919 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1923 * Allocate a TUN device keep-alive file descriptor that will only be
1924 * closed when the TUN device itself is closed or removed.
1925 * This keep-alive file descriptor will guarantee that the TUN device
1926 * exists even when all of its queues are closed
1928 pmd->ka_fd = tun_alloc(pmd, 1);
1929 if (pmd->ka_fd == -1) {
1930 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
1933 TAP_LOG(DEBUG, "allocated %s", pmd->name);
1935 ifr.ifr_mtu = dev->data->mtu;
1936 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1939 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1940 memset(&ifr, 0, sizeof(struct ifreq));
1941 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1942 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1943 RTE_ETHER_ADDR_LEN);
1944 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1949 * Set up everything related to rte_flow:
1951 * - tap / remote if_index
1952 * - mandatory QDISCs
1953 * - rte_flow actual/implicit lists
1956 pmd->nlsk_fd = tap_nl_init(0);
1957 if (pmd->nlsk_fd == -1) {
1958 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
1960 goto disable_rte_flow;
1962 pmd->if_index = if_nametoindex(pmd->name);
1963 if (!pmd->if_index) {
1964 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
1965 goto disable_rte_flow;
1967 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1968 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
1970 goto disable_rte_flow;
1972 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1973 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1975 goto disable_rte_flow;
1977 LIST_INIT(&pmd->flows);
1979 if (strlen(remote_iface)) {
1980 pmd->remote_if_index = if_nametoindex(remote_iface);
1981 if (!pmd->remote_if_index) {
1982 TAP_LOG(ERR, "%s: failed to get %s if_index.",
1983 pmd->name, remote_iface);
1986 strlcpy(pmd->remote_iface, remote_iface, RTE_ETH_NAME_MAX_LEN);
1988 /* Save state of remote device */
1989 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
1991 /* Replicate remote MAC address */
1992 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
1993 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
1994 pmd->name, pmd->remote_iface);
1997 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
1998 RTE_ETHER_ADDR_LEN);
1999 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
2000 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
2001 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
2002 pmd->name, remote_iface);
2007 * Flush usually returns negative value because it tries to
2008 * delete every QDISC (and on a running device, one QDISC at
2009 * least is needed). Ignore negative return value.
2011 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
2012 if (qdisc_create_ingress(pmd->nlsk_fd,
2013 pmd->remote_if_index) < 0) {
2014 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
2018 LIST_INIT(&pmd->implicit_flows);
2019 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
2020 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
2021 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
2022 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
2024 "%s: failed to create implicit rules.",
2030 rte_eth_dev_probing_finish(dev);
2034 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
2035 strerror(errno), errno);
2036 if (strlen(remote_iface)) {
2037 TAP_LOG(ERR, "Remote feature requires flow support.");
2040 rte_eth_dev_probing_finish(dev);
2044 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
2045 strerror(errno), errno);
2046 tap_flow_implicit_flush(pmd, NULL);
2049 if (pmd->nlsk_fd != -1)
2050 close(pmd->nlsk_fd);
2051 if (pmd->ka_fd != -1)
2053 if (pmd->ioctl_sock != -1)
2054 close(pmd->ioctl_sock);
2055 /* mac_addrs must not be freed alone because part of dev_private */
2056 dev->data->mac_addrs = NULL;
2057 rte_eth_dev_release_port(dev);
2060 TAP_LOG(ERR, "%s Unable to initialize %s",
2061 tuntap_name, rte_vdev_device_name(vdev));
2066 /* make sure name is a possible Linux network device name */
2068 is_valid_iface(const char *name)
2073 if (strnlen(name, IFNAMSIZ) == IFNAMSIZ)
2077 if (*name == '/' || *name == ':' || isspace(*name))
2085 set_interface_name(const char *key __rte_unused,
2089 char *name = (char *)extra_args;
2092 if (!is_valid_iface(value)) {
2093 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2097 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2099 /* use tap%d which causes kernel to choose next available */
2100 strlcpy(name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2106 set_remote_iface(const char *key __rte_unused,
2110 char *name = (char *)extra_args;
2113 if (!is_valid_iface(value)) {
2114 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2118 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2124 static int parse_user_mac(struct rte_ether_addr *user_mac,
2127 unsigned int index = 0;
2128 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
2130 if (user_mac == NULL || value == NULL)
2133 strlcpy(mac_temp, value, sizeof(mac_temp));
2134 mac_byte = strtok(mac_temp, ":");
2136 while ((mac_byte != NULL) &&
2137 (strlen(mac_byte) <= 2) &&
2138 (strlen(mac_byte) == strspn(mac_byte,
2139 ETH_TAP_CMP_MAC_FMT))) {
2140 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
2141 mac_byte = strtok(NULL, ":");
2148 set_mac_type(const char *key __rte_unused,
2152 struct rte_ether_addr *user_mac = extra_args;
2157 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
2158 static int iface_idx;
2160 /* fixed mac = 00:64:74:61:70:<iface_idx> */
2161 memcpy((char *)user_mac->addr_bytes, "\0dtap",
2162 RTE_ETHER_ADDR_LEN);
2163 user_mac->addr_bytes[RTE_ETHER_ADDR_LEN - 1] =
2168 if (parse_user_mac(user_mac, value) != 6)
2171 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
2175 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
2176 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
2181 * Open a TUN interface device. TUN PMD
2182 * 1) sets tap_type as false
2183 * 2) intakes iface as argument.
2184 * 3) as interface is virtual set speed to 10G
2187 rte_pmd_tun_probe(struct rte_vdev_device *dev)
2189 const char *name, *params;
2191 struct rte_kvargs *kvlist = NULL;
2192 char tun_name[RTE_ETH_NAME_MAX_LEN];
2193 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2194 struct rte_eth_dev *eth_dev;
2196 name = rte_vdev_device_name(dev);
2197 params = rte_vdev_device_args(dev);
2198 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2200 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
2201 strlen(params) == 0) {
2202 eth_dev = rte_eth_dev_attach_secondary(name);
2204 TAP_LOG(ERR, "Failed to probe %s", name);
2207 eth_dev->dev_ops = &ops;
2208 eth_dev->device = &dev->device;
2209 rte_eth_dev_probing_finish(eth_dev);
2213 /* use tun%d which causes kernel to choose next available */
2214 strlcpy(tun_name, DEFAULT_TUN_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2216 if (params && (params[0] != '\0')) {
2217 TAP_LOG(DEBUG, "parameters (%s)", params);
2219 kvlist = rte_kvargs_parse(params, valid_arguments);
2221 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2222 ret = rte_kvargs_process(kvlist,
2224 &set_interface_name,
2232 pmd_link.link_speed = ETH_SPEED_NUM_10G;
2234 TAP_LOG(DEBUG, "Initializing pmd_tun for %s", name);
2236 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0,
2237 ETH_TUNTAP_TYPE_TUN);
2241 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2244 rte_kvargs_free(kvlist);
2249 /* Request queue file descriptors from secondary to primary. */
2251 tap_mp_attach_queues(const char *port_name, struct rte_eth_dev *dev)
2254 struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};
2255 struct rte_mp_msg request, *reply;
2256 struct rte_mp_reply replies;
2257 struct ipc_queues *request_param = (struct ipc_queues *)request.param;
2258 struct ipc_queues *reply_param;
2259 struct pmd_process_private *process_private = dev->process_private;
2260 int queue, fd_iterator;
2262 /* Prepare the request */
2263 memset(&request, 0, sizeof(request));
2264 strlcpy(request.name, TAP_MP_KEY, sizeof(request.name));
2265 strlcpy(request_param->port_name, port_name,
2266 sizeof(request_param->port_name));
2267 request.len_param = sizeof(*request_param);
2268 /* Send request and receive reply */
2269 ret = rte_mp_request_sync(&request, &replies, &timeout);
2270 if (ret < 0 || replies.nb_received != 1) {
2271 TAP_LOG(ERR, "Failed to request queues from primary: %d",
2275 reply = &replies.msgs[0];
2276 reply_param = (struct ipc_queues *)reply->param;
2277 TAP_LOG(DEBUG, "Received IPC reply for %s", reply_param->port_name);
2279 /* Attach the queues from received file descriptors */
2280 if (reply_param->rxq_count + reply_param->txq_count != reply->num_fds) {
2281 TAP_LOG(ERR, "Unexpected number of fds received");
2285 dev->data->nb_rx_queues = reply_param->rxq_count;
2286 dev->data->nb_tx_queues = reply_param->txq_count;
2288 for (queue = 0; queue < reply_param->rxq_count; queue++)
2289 process_private->rxq_fds[queue] = reply->fds[fd_iterator++];
2290 for (queue = 0; queue < reply_param->txq_count; queue++)
2291 process_private->txq_fds[queue] = reply->fds[fd_iterator++];
2296 /* Send the queue file descriptors from the primary process to secondary. */
2298 tap_mp_sync_queues(const struct rte_mp_msg *request, const void *peer)
2300 struct rte_eth_dev *dev;
2301 struct pmd_process_private *process_private;
2302 struct rte_mp_msg reply;
2303 const struct ipc_queues *request_param =
2304 (const struct ipc_queues *)request->param;
2305 struct ipc_queues *reply_param =
2306 (struct ipc_queues *)reply.param;
2311 /* Get requested port */
2312 TAP_LOG(DEBUG, "Received IPC request for %s", request_param->port_name);
2313 ret = rte_eth_dev_get_port_by_name(request_param->port_name, &port_id);
2315 TAP_LOG(ERR, "Failed to get port id for %s",
2316 request_param->port_name);
2319 dev = &rte_eth_devices[port_id];
2320 process_private = dev->process_private;
2322 /* Fill file descriptors for all queues */
2324 reply_param->rxq_count = 0;
2325 if (dev->data->nb_rx_queues + dev->data->nb_tx_queues >
2327 TAP_LOG(ERR, "Number of rx/tx queues exceeds max number of fds");
2331 for (queue = 0; queue < dev->data->nb_rx_queues; queue++) {
2332 reply.fds[reply.num_fds++] = process_private->rxq_fds[queue];
2333 reply_param->rxq_count++;
2335 RTE_ASSERT(reply_param->rxq_count == dev->data->nb_rx_queues);
2337 reply_param->txq_count = 0;
2338 for (queue = 0; queue < dev->data->nb_tx_queues; queue++) {
2339 reply.fds[reply.num_fds++] = process_private->txq_fds[queue];
2340 reply_param->txq_count++;
2342 RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
2345 strlcpy(reply.name, request->name, sizeof(reply.name));
2346 strlcpy(reply_param->port_name, request_param->port_name,
2347 sizeof(reply_param->port_name));
2348 reply.len_param = sizeof(*reply_param);
2349 if (rte_mp_reply(&reply, peer) < 0) {
2350 TAP_LOG(ERR, "Failed to reply an IPC request to sync queues");
2356 /* Open a TAP interface device.
2359 rte_pmd_tap_probe(struct rte_vdev_device *dev)
2361 const char *name, *params;
2363 struct rte_kvargs *kvlist = NULL;
2365 char tap_name[RTE_ETH_NAME_MAX_LEN];
2366 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2367 struct rte_ether_addr user_mac = { .addr_bytes = {0} };
2368 struct rte_eth_dev *eth_dev;
2369 int tap_devices_count_increased = 0;
2371 name = rte_vdev_device_name(dev);
2372 params = rte_vdev_device_args(dev);
2374 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
2375 eth_dev = rte_eth_dev_attach_secondary(name);
2377 TAP_LOG(ERR, "Failed to probe %s", name);
2380 eth_dev->dev_ops = &ops;
2381 eth_dev->device = &dev->device;
2382 eth_dev->rx_pkt_burst = pmd_rx_burst;
2383 eth_dev->tx_pkt_burst = pmd_tx_burst;
2384 if (!rte_eal_primary_proc_alive(NULL)) {
2385 TAP_LOG(ERR, "Primary process is missing");
2388 eth_dev->process_private = (struct pmd_process_private *)
2389 rte_zmalloc_socket(name,
2390 sizeof(struct pmd_process_private),
2391 RTE_CACHE_LINE_SIZE,
2392 eth_dev->device->numa_node);
2393 if (eth_dev->process_private == NULL) {
2395 "Failed to alloc memory for process private");
2399 ret = tap_mp_attach_queues(name, eth_dev);
2402 rte_eth_dev_probing_finish(eth_dev);
2406 speed = ETH_SPEED_NUM_10G;
2408 /* use tap%d which causes kernel to choose next available */
2409 strlcpy(tap_name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2410 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2412 if (params && (params[0] != '\0')) {
2413 TAP_LOG(DEBUG, "parameters (%s)", params);
2415 kvlist = rte_kvargs_parse(params, valid_arguments);
2417 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2418 ret = rte_kvargs_process(kvlist,
2420 &set_interface_name,
2426 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
2427 ret = rte_kvargs_process(kvlist,
2435 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
2436 ret = rte_kvargs_process(kvlist,
2445 pmd_link.link_speed = speed;
2447 TAP_LOG(DEBUG, "Initializing pmd_tap for %s", name);
2449 /* Register IPC feed callback */
2450 if (!tap_devices_count) {
2451 ret = rte_mp_action_register(TAP_MP_KEY, tap_mp_sync_queues);
2452 if (ret < 0 && rte_errno != ENOTSUP) {
2453 TAP_LOG(ERR, "tap: Failed to register IPC callback: %s",
2454 strerror(rte_errno));
2458 tap_devices_count++;
2459 tap_devices_count_increased = 1;
2460 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac,
2461 ETH_TUNTAP_TYPE_TAP);
2465 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2467 if (tap_devices_count_increased == 1) {
2468 if (tap_devices_count == 1)
2469 rte_mp_action_unregister(TAP_MP_KEY);
2470 tap_devices_count--;
2473 rte_kvargs_free(kvlist);
2478 /* detach a TUNTAP device.
2481 rte_pmd_tap_remove(struct rte_vdev_device *dev)
2483 struct rte_eth_dev *eth_dev = NULL;
2484 struct pmd_internals *internals;
2486 /* find the ethdev entry */
2487 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
2491 /* mac_addrs must not be freed alone because part of dev_private */
2492 eth_dev->data->mac_addrs = NULL;
2494 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
2495 return rte_eth_dev_release_port(eth_dev);
2497 tap_dev_close(eth_dev);
2499 internals = eth_dev->data->dev_private;
2500 TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
2501 tuntap_types[internals->type], rte_socket_id());
2503 close(internals->ioctl_sock);
2504 rte_free(eth_dev->process_private);
2505 if (tap_devices_count == 1)
2506 rte_mp_action_unregister(TAP_MP_KEY);
2507 tap_devices_count--;
2508 rte_eth_dev_release_port(eth_dev);
2513 static struct rte_vdev_driver pmd_tun_drv = {
2514 .probe = rte_pmd_tun_probe,
2515 .remove = rte_pmd_tap_remove,
2518 static struct rte_vdev_driver pmd_tap_drv = {
2519 .probe = rte_pmd_tap_probe,
2520 .remove = rte_pmd_tap_remove,
2523 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
2524 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
2525 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
2526 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
2527 ETH_TAP_IFACE_ARG "=<string> ");
2528 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
2529 ETH_TAP_IFACE_ARG "=<string> "
2530 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
2531 ETH_TAP_REMOTE_ARG "=<string>");
2532 RTE_LOG_REGISTER(tap_logtype, pmd.net.tap, NOTICE);