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 <ethdev_driver.h>
11 #include <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 *tuntap_types[ETH_TUNTAP_TYPE_MAX] = {
76 "UNKNOWN", "TUN", "TAP"
79 static const char *valid_arguments[] = {
86 static volatile uint32_t tap_trigger; /* Rx trigger */
88 static struct rte_eth_link pmd_link = {
89 .link_speed = ETH_SPEED_NUM_10G,
90 .link_duplex = ETH_LINK_FULL_DUPLEX,
91 .link_status = ETH_LINK_DOWN,
92 .link_autoneg = ETH_LINK_FIXED,
96 tap_trigger_cb(int sig __rte_unused)
98 /* Valid trigger values are nonzero */
99 tap_trigger = (tap_trigger + 1) | 0x80000000;
102 /* Specifies on what netdevices the ioctl should be applied */
109 /* Message header to synchronize queues via IPC */
111 char port_name[RTE_DEV_NAME_MAX_LEN];
115 * The file descriptors are in the dedicated part
116 * of the Unix message to be translated by the kernel.
120 static int tap_intr_handle_set(struct rte_eth_dev *dev, int set);
123 * Tun/Tap allocation routine
126 * Pointer to private structure.
128 * @param[in] is_keepalive
132 * -1 on failure, fd on success
135 tun_alloc(struct pmd_internals *pmd, int is_keepalive)
138 #ifdef IFF_MULTI_QUEUE
139 unsigned int features;
141 int fd, signo, flags;
143 memset(&ifr, 0, sizeof(struct ifreq));
146 * Do not set IFF_NO_PI as packet information header will be needed
147 * to check if a received packet has been truncated.
149 ifr.ifr_flags = (pmd->type == ETH_TUNTAP_TYPE_TAP) ?
150 IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
151 strlcpy(ifr.ifr_name, pmd->name, IFNAMSIZ);
153 fd = open(TUN_TAP_DEV_PATH, O_RDWR);
155 TAP_LOG(ERR, "Unable to open %s interface", TUN_TAP_DEV_PATH);
159 #ifdef IFF_MULTI_QUEUE
160 /* Grab the TUN features to verify we can work multi-queue */
161 if (ioctl(fd, TUNGETFEATURES, &features) < 0) {
162 TAP_LOG(ERR, "unable to get TUN/TAP features");
165 TAP_LOG(DEBUG, "%s Features %08x", TUN_TAP_DEV_PATH, features);
167 if (features & IFF_MULTI_QUEUE) {
168 TAP_LOG(DEBUG, " Multi-queue support for %d queues",
169 RTE_PMD_TAP_MAX_QUEUES);
170 ifr.ifr_flags |= IFF_MULTI_QUEUE;
174 ifr.ifr_flags |= IFF_ONE_QUEUE;
175 TAP_LOG(DEBUG, " Single queue only support");
178 /* Set the TUN/TAP configuration and set the name if needed */
179 if (ioctl(fd, TUNSETIFF, (void *)&ifr) < 0) {
180 TAP_LOG(WARNING, "Unable to set TUNSETIFF for %s: %s",
181 ifr.ifr_name, strerror(errno));
186 * Name passed to kernel might be wildcard like dtun%d
187 * and need to find the resulting device.
189 TAP_LOG(DEBUG, "Device name is '%s'", ifr.ifr_name);
190 strlcpy(pmd->name, ifr.ifr_name, RTE_ETH_NAME_MAX_LEN);
194 * Detach the TUN/TAP keep-alive queue
195 * to avoid traffic through it
197 ifr.ifr_flags = IFF_DETACH_QUEUE;
198 if (ioctl(fd, TUNSETQUEUE, (void *)&ifr) < 0) {
200 "Unable to detach keep-alive queue for %s: %s",
201 ifr.ifr_name, strerror(errno));
206 flags = fcntl(fd, F_GETFL);
209 "Unable to get %s current flags\n",
214 /* Always set the file descriptor to non-blocking */
216 if (fcntl(fd, F_SETFL, flags) < 0) {
218 "Unable to set %s to nonblocking: %s",
219 ifr.ifr_name, strerror(errno));
223 /* Find a free realtime signal */
224 for (signo = SIGRTMIN + 1; signo < SIGRTMAX; signo++) {
227 if (sigaction(signo, NULL, &sa) == -1) {
229 "Unable to get current rt-signal %d handler",
234 /* Already have the handler we want on this signal */
235 if (sa.sa_handler == tap_trigger_cb)
238 /* Is handler in use by application */
239 if (sa.sa_handler != SIG_DFL) {
241 "Skipping used rt-signal %d", signo);
245 sa = (struct sigaction) {
246 .sa_flags = SA_RESTART,
247 .sa_handler = tap_trigger_cb,
250 if (sigaction(signo, &sa, NULL) == -1) {
252 "Unable to set rt-signal %d handler\n", signo);
256 /* Found a good signal to use */
258 "Using rt-signal %d", signo);
262 if (signo == SIGRTMAX) {
263 TAP_LOG(WARNING, "All rt-signals are in use\n");
265 /* Disable trigger globally in case of error */
267 TAP_LOG(NOTICE, "No Rx trigger signal available\n");
269 /* Enable signal on file descriptor */
270 if (fcntl(fd, F_SETSIG, signo) < 0) {
271 TAP_LOG(WARNING, "Unable to set signo %d for fd %d: %s",
272 signo, fd, strerror(errno));
275 if (fcntl(fd, F_SETFL, flags | O_ASYNC) < 0) {
276 TAP_LOG(WARNING, "Unable to set fcntl flags: %s",
281 if (fcntl(fd, F_SETOWN, getpid()) < 0) {
282 TAP_LOG(WARNING, "Unable to set fcntl owner: %s",
296 tap_verify_csum(struct rte_mbuf *mbuf)
298 uint32_t l2 = mbuf->packet_type & RTE_PTYPE_L2_MASK;
299 uint32_t l3 = mbuf->packet_type & RTE_PTYPE_L3_MASK;
300 uint32_t l4 = mbuf->packet_type & RTE_PTYPE_L4_MASK;
301 unsigned int l2_len = sizeof(struct rte_ether_hdr);
306 struct rte_udp_hdr *udp_hdr;
308 if (l2 == RTE_PTYPE_L2_ETHER_VLAN)
310 else if (l2 == RTE_PTYPE_L2_ETHER_QINQ)
312 /* Don't verify checksum for packets with discontinuous L2 header */
313 if (unlikely(l2_len + sizeof(struct rte_ipv4_hdr) >
314 rte_pktmbuf_data_len(mbuf)))
316 l3_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len);
317 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
318 struct rte_ipv4_hdr *iph = l3_hdr;
320 l3_len = rte_ipv4_hdr_len(iph);
321 if (unlikely(l2_len + l3_len > rte_pktmbuf_data_len(mbuf)))
323 /* check that the total length reported by header is not
324 * greater than the total received size
326 if (l2_len + rte_be_to_cpu_16(iph->total_length) >
327 rte_pktmbuf_data_len(mbuf))
330 cksum = ~rte_raw_cksum(iph, l3_len);
331 mbuf->ol_flags |= cksum ?
332 PKT_RX_IP_CKSUM_BAD :
333 PKT_RX_IP_CKSUM_GOOD;
334 } else if (l3 == RTE_PTYPE_L3_IPV6) {
335 struct rte_ipv6_hdr *iph = l3_hdr;
337 l3_len = sizeof(struct rte_ipv6_hdr);
338 /* check that the total length reported by header is not
339 * greater than the total received size
341 if (l2_len + l3_len + rte_be_to_cpu_16(iph->payload_len) >
342 rte_pktmbuf_data_len(mbuf))
345 /* IPv6 extensions are not supported */
348 if (l4 == RTE_PTYPE_L4_UDP || l4 == RTE_PTYPE_L4_TCP) {
351 l4_hdr = rte_pktmbuf_mtod_offset(mbuf, void *, l2_len + l3_len);
352 /* Don't verify checksum for multi-segment packets. */
353 if (mbuf->nb_segs > 1)
355 if (l3 == RTE_PTYPE_L3_IPV4 || l3 == RTE_PTYPE_L3_IPV4_EXT) {
356 if (l4 == RTE_PTYPE_L4_UDP) {
357 udp_hdr = (struct rte_udp_hdr *)l4_hdr;
358 if (udp_hdr->dgram_cksum == 0) {
360 * For IPv4, a zero UDP checksum
361 * indicates that the sender did not
362 * generate one [RFC 768].
364 mbuf->ol_flags |= PKT_RX_L4_CKSUM_NONE;
368 cksum_ok = !rte_ipv4_udptcp_cksum_verify(l3_hdr, l4_hdr);
369 } else { /* l3 == RTE_PTYPE_L3_IPV6, checked above */
370 cksum_ok = !rte_ipv6_udptcp_cksum_verify(l3_hdr, l4_hdr);
372 mbuf->ol_flags |= cksum_ok ?
373 PKT_RX_L4_CKSUM_GOOD : PKT_RX_L4_CKSUM_BAD;
378 tap_rx_offload_get_port_capa(void)
381 * No specific port Rx offload capabilities.
387 tap_rx_offload_get_queue_capa(void)
389 return DEV_RX_OFFLOAD_SCATTER |
390 DEV_RX_OFFLOAD_IPV4_CKSUM |
391 DEV_RX_OFFLOAD_UDP_CKSUM |
392 DEV_RX_OFFLOAD_TCP_CKSUM;
396 tap_rxq_pool_free(struct rte_mbuf *pool)
398 struct rte_mbuf *mbuf = pool;
399 uint16_t nb_segs = 1;
408 pool->nb_segs = nb_segs;
409 rte_pktmbuf_free(pool);
412 /* Callback to handle the rx burst of packets to the correct interface and
413 * file descriptor(s) in a multi-queue setup.
416 pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
418 struct rx_queue *rxq = queue;
419 struct pmd_process_private *process_private;
421 unsigned long num_rx_bytes = 0;
422 uint32_t trigger = tap_trigger;
424 if (trigger == rxq->trigger_seen)
427 process_private = rte_eth_devices[rxq->in_port].process_private;
428 for (num_rx = 0; num_rx < nb_pkts; ) {
429 struct rte_mbuf *mbuf = rxq->pool;
430 struct rte_mbuf *seg = NULL;
431 struct rte_mbuf *new_tail = NULL;
432 uint16_t data_off = rte_pktmbuf_headroom(mbuf);
435 len = readv(process_private->rxq_fds[rxq->queue_id],
437 1 + (rxq->rxmode->offloads & DEV_RX_OFFLOAD_SCATTER ?
438 rxq->nb_rx_desc : 1));
439 if (len < (int)sizeof(struct tun_pi))
442 /* Packet couldn't fit in the provided mbuf */
443 if (unlikely(rxq->pi.flags & TUN_PKT_STRIP)) {
444 rxq->stats.ierrors++;
448 len -= sizeof(struct tun_pi);
451 mbuf->port = rxq->in_port;
453 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
455 if (unlikely(!buf)) {
456 rxq->stats.rx_nombuf++;
457 /* No new buf has been allocated: do nothing */
458 if (!new_tail || !seg)
462 tap_rxq_pool_free(mbuf);
466 seg = seg ? seg->next : mbuf;
467 if (rxq->pool == mbuf)
470 new_tail->next = buf;
472 new_tail->next = seg->next;
474 /* iovecs[0] is reserved for packet info (pi) */
475 (*rxq->iovecs)[mbuf->nb_segs].iov_len =
476 buf->buf_len - data_off;
477 (*rxq->iovecs)[mbuf->nb_segs].iov_base =
478 (char *)buf->buf_addr + data_off;
480 seg->data_len = RTE_MIN(seg->buf_len - data_off, len);
481 seg->data_off = data_off;
483 len -= seg->data_len;
487 /* First segment has headroom, not the others */
491 mbuf->packet_type = rte_net_get_ptype(mbuf, NULL,
493 if (rxq->rxmode->offloads & DEV_RX_OFFLOAD_CHECKSUM)
494 tap_verify_csum(mbuf);
496 /* account for the receive frame */
497 bufs[num_rx++] = mbuf;
498 num_rx_bytes += mbuf->pkt_len;
501 rxq->stats.ipackets += num_rx;
502 rxq->stats.ibytes += num_rx_bytes;
504 if (trigger && num_rx < nb_pkts)
505 rxq->trigger_seen = trigger;
511 tap_tx_offload_get_port_capa(void)
514 * No specific port Tx offload capabilities.
520 tap_tx_offload_get_queue_capa(void)
522 return DEV_TX_OFFLOAD_MULTI_SEGS |
523 DEV_TX_OFFLOAD_IPV4_CKSUM |
524 DEV_TX_OFFLOAD_UDP_CKSUM |
525 DEV_TX_OFFLOAD_TCP_CKSUM |
526 DEV_TX_OFFLOAD_TCP_TSO;
529 /* Finalize l4 checksum calculation */
531 tap_tx_l4_cksum(uint16_t *l4_cksum, uint16_t l4_phdr_cksum,
532 uint32_t l4_raw_cksum)
537 cksum = __rte_raw_cksum_reduce(l4_raw_cksum);
538 cksum += l4_phdr_cksum;
540 cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
541 cksum = (~cksum) & 0xffff;
548 /* Accumaulate L4 raw checksums */
550 tap_tx_l4_add_rcksum(char *l4_data, unsigned int l4_len, uint16_t *l4_cksum,
551 uint32_t *l4_raw_cksum)
553 if (l4_cksum == NULL)
556 *l4_raw_cksum = __rte_raw_cksum(l4_data, l4_len, *l4_raw_cksum);
559 /* L3 and L4 pseudo headers checksum offloads */
561 tap_tx_l3_cksum(char *packet, uint64_t ol_flags, unsigned int l2_len,
562 unsigned int l3_len, unsigned int l4_len, uint16_t **l4_cksum,
563 uint16_t *l4_phdr_cksum, uint32_t *l4_raw_cksum)
565 void *l3_hdr = packet + l2_len;
567 if (ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4)) {
568 struct rte_ipv4_hdr *iph = l3_hdr;
571 iph->hdr_checksum = 0;
572 cksum = rte_raw_cksum(iph, l3_len);
573 iph->hdr_checksum = (cksum == 0xffff) ? cksum : ~cksum;
575 if (ol_flags & PKT_TX_L4_MASK) {
578 l4_hdr = packet + l2_len + l3_len;
579 if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM)
580 *l4_cksum = &((struct rte_udp_hdr *)l4_hdr)->dgram_cksum;
581 else if ((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM)
582 *l4_cksum = &((struct rte_tcp_hdr *)l4_hdr)->cksum;
586 if (ol_flags & PKT_TX_IPV4)
587 *l4_phdr_cksum = rte_ipv4_phdr_cksum(l3_hdr, 0);
589 *l4_phdr_cksum = rte_ipv6_phdr_cksum(l3_hdr, 0);
590 *l4_raw_cksum = __rte_raw_cksum(l4_hdr, l4_len, 0);
595 tap_write_mbufs(struct tx_queue *txq, uint16_t num_mbufs,
596 struct rte_mbuf **pmbufs,
597 uint16_t *num_packets, unsigned long *num_tx_bytes)
601 struct pmd_process_private *process_private;
603 process_private = rte_eth_devices[txq->out_port].process_private;
605 for (i = 0; i < num_mbufs; i++) {
606 struct rte_mbuf *mbuf = pmbufs[i];
607 struct iovec iovecs[mbuf->nb_segs + 2];
608 struct tun_pi pi = { .flags = 0, .proto = 0x00 };
609 struct rte_mbuf *seg = mbuf;
610 char m_copy[mbuf->data_len];
614 int k; /* current index in iovecs for copying segments */
615 uint16_t seg_len; /* length of first segment */
617 uint16_t *l4_cksum; /* l4 checksum (pseudo header + payload) */
618 uint32_t l4_raw_cksum = 0; /* TCP/UDP payload raw checksum */
619 uint16_t l4_phdr_cksum = 0; /* TCP/UDP pseudo header checksum */
620 uint16_t is_cksum = 0; /* in case cksum should be offloaded */
623 if (txq->type == ETH_TUNTAP_TYPE_TUN) {
625 * TUN and TAP are created with IFF_NO_PI disabled.
626 * For TUN PMD this mandatory as fields are used by
627 * Kernel tun.c to determine whether its IP or non IP
630 * The logic fetches the first byte of data from mbuf
631 * then compares whether its v4 or v6. If first byte
632 * is 4 or 6, then protocol field is updated.
634 char *buff_data = rte_pktmbuf_mtod(seg, void *);
635 proto = (*buff_data & 0xf0);
636 pi.proto = (proto == 0x40) ?
637 rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4) :
639 rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6) :
644 iovecs[k].iov_base = π
645 iovecs[k].iov_len = sizeof(pi);
648 nb_segs = mbuf->nb_segs;
650 ((mbuf->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_IPV4) ||
651 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_UDP_CKSUM ||
652 (mbuf->ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM))) {
655 /* Support only packets with at least layer 4
656 * header included in the first segment
658 seg_len = rte_pktmbuf_data_len(mbuf);
659 l234_hlen = mbuf->l2_len + mbuf->l3_len + mbuf->l4_len;
660 if (seg_len < l234_hlen)
663 /* To change checksums, work on a * copy of l2, l3
664 * headers + l4 pseudo header
666 rte_memcpy(m_copy, rte_pktmbuf_mtod(mbuf, void *),
668 tap_tx_l3_cksum(m_copy, mbuf->ol_flags,
669 mbuf->l2_len, mbuf->l3_len, mbuf->l4_len,
670 &l4_cksum, &l4_phdr_cksum,
672 iovecs[k].iov_base = m_copy;
673 iovecs[k].iov_len = l234_hlen;
676 /* Update next iovecs[] beyond l2, l3, l4 headers */
677 if (seg_len > l234_hlen) {
678 iovecs[k].iov_len = seg_len - l234_hlen;
680 rte_pktmbuf_mtod(seg, char *) +
682 tap_tx_l4_add_rcksum(iovecs[k].iov_base,
683 iovecs[k].iov_len, l4_cksum,
691 for (j = k; j <= nb_segs; j++) {
692 iovecs[j].iov_len = rte_pktmbuf_data_len(seg);
693 iovecs[j].iov_base = rte_pktmbuf_mtod(seg, void *);
695 tap_tx_l4_add_rcksum(iovecs[j].iov_base,
696 iovecs[j].iov_len, l4_cksum,
702 tap_tx_l4_cksum(l4_cksum, l4_phdr_cksum, l4_raw_cksum);
704 /* copy the tx frame data */
705 n = writev(process_private->txq_fds[txq->queue_id], iovecs, j);
710 (*num_tx_bytes) += rte_pktmbuf_pkt_len(mbuf);
715 /* Callback to handle sending packets from the tap interface
718 pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
720 struct tx_queue *txq = queue;
722 uint16_t num_packets = 0;
723 unsigned long num_tx_bytes = 0;
727 if (unlikely(nb_pkts == 0))
730 struct rte_mbuf *gso_mbufs[MAX_GSO_MBUFS];
731 max_size = *txq->mtu + (RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN + 4);
732 for (i = 0; i < nb_pkts; i++) {
733 struct rte_mbuf *mbuf_in = bufs[num_tx];
734 struct rte_mbuf **mbuf;
735 uint16_t num_mbufs = 0;
736 uint16_t tso_segsz = 0;
742 tso = mbuf_in->ol_flags & PKT_TX_TCP_SEG;
744 struct rte_gso_ctx *gso_ctx = &txq->gso_ctx;
746 /* TCP segmentation implies TCP checksum offload */
747 mbuf_in->ol_flags |= PKT_TX_TCP_CKSUM;
749 /* gso size is calculated without RTE_ETHER_CRC_LEN */
750 hdrs_len = mbuf_in->l2_len + mbuf_in->l3_len +
752 tso_segsz = mbuf_in->tso_segsz + hdrs_len;
753 if (unlikely(tso_segsz == hdrs_len) ||
754 tso_segsz > *txq->mtu) {
758 gso_ctx->gso_size = tso_segsz;
759 /* 'mbuf_in' packet to segment */
760 num_tso_mbufs = rte_gso_segment(mbuf_in,
761 gso_ctx, /* gso control block */
762 (struct rte_mbuf **)&gso_mbufs, /* out mbufs */
763 RTE_DIM(gso_mbufs)); /* max tso mbufs */
765 /* ret contains the number of new created mbufs */
766 if (num_tso_mbufs < 0)
769 if (num_tso_mbufs >= 1) {
771 num_mbufs = num_tso_mbufs;
773 /* 0 means it can be transmitted directly
780 /* stats.errs will be incremented */
781 if (rte_pktmbuf_pkt_len(mbuf_in) > max_size)
784 /* ret 0 indicates no new mbufs were created */
790 ret = tap_write_mbufs(txq, num_mbufs, mbuf,
791 &num_packets, &num_tx_bytes);
795 if (num_tso_mbufs > 0)
796 rte_pktmbuf_free_bulk(mbuf, num_tso_mbufs);
800 /* free original mbuf */
801 rte_pktmbuf_free(mbuf_in);
803 if (num_tso_mbufs > 0)
804 rte_pktmbuf_free_bulk(mbuf, num_tso_mbufs);
807 txq->stats.opackets += num_packets;
808 txq->stats.errs += nb_pkts - num_tx;
809 txq->stats.obytes += num_tx_bytes;
815 tap_ioctl_req2str(unsigned long request)
819 return "SIOCSIFFLAGS";
821 return "SIOCGIFFLAGS";
823 return "SIOCGIFHWADDR";
825 return "SIOCSIFHWADDR";
833 tap_ioctl(struct pmd_internals *pmd, unsigned long request,
834 struct ifreq *ifr, int set, enum ioctl_mode mode)
836 short req_flags = ifr->ifr_flags;
837 int remote = pmd->remote_if_index &&
838 (mode == REMOTE_ONLY || mode == LOCAL_AND_REMOTE);
840 if (!pmd->remote_if_index && mode == REMOTE_ONLY)
843 * If there is a remote netdevice, apply ioctl on it, then apply it on
848 strlcpy(ifr->ifr_name, pmd->remote_iface, IFNAMSIZ);
849 else if (mode == LOCAL_ONLY || mode == LOCAL_AND_REMOTE)
850 strlcpy(ifr->ifr_name, pmd->name, IFNAMSIZ);
853 /* fetch current flags to leave other flags untouched */
854 if (ioctl(pmd->ioctl_sock, SIOCGIFFLAGS, ifr) < 0)
857 ifr->ifr_flags |= req_flags;
859 ifr->ifr_flags &= ~req_flags;
867 TAP_LOG(WARNING, "%s: ioctl() called with wrong arg",
871 if (ioctl(pmd->ioctl_sock, request, ifr) < 0)
873 if (remote-- && mode == LOCAL_AND_REMOTE)
878 TAP_LOG(DEBUG, "%s(%s) failed: %s(%d)", ifr->ifr_name,
879 tap_ioctl_req2str(request), strerror(errno), errno);
884 tap_link_set_down(struct rte_eth_dev *dev)
886 struct pmd_internals *pmd = dev->data->dev_private;
887 struct ifreq ifr = { .ifr_flags = IFF_UP };
889 dev->data->dev_link.link_status = ETH_LINK_DOWN;
890 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_ONLY);
894 tap_link_set_up(struct rte_eth_dev *dev)
896 struct pmd_internals *pmd = dev->data->dev_private;
897 struct ifreq ifr = { .ifr_flags = IFF_UP };
899 dev->data->dev_link.link_status = ETH_LINK_UP;
900 return tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
904 tap_dev_start(struct rte_eth_dev *dev)
908 err = tap_intr_handle_set(dev, 1);
912 err = tap_link_set_up(dev);
916 for (i = 0; i < dev->data->nb_tx_queues; i++)
917 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
918 for (i = 0; i < dev->data->nb_rx_queues; i++)
919 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STARTED;
924 /* This function gets called when the current port gets stopped.
927 tap_dev_stop(struct rte_eth_dev *dev)
931 for (i = 0; i < dev->data->nb_tx_queues; i++)
932 dev->data->tx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
933 for (i = 0; i < dev->data->nb_rx_queues; i++)
934 dev->data->rx_queue_state[i] = RTE_ETH_QUEUE_STATE_STOPPED;
936 tap_intr_handle_set(dev, 0);
937 tap_link_set_down(dev);
943 tap_dev_configure(struct rte_eth_dev *dev)
945 struct pmd_internals *pmd = dev->data->dev_private;
947 if (dev->data->nb_rx_queues > RTE_PMD_TAP_MAX_QUEUES) {
949 "%s: number of rx queues %d exceeds max num of queues %d",
951 dev->data->nb_rx_queues,
952 RTE_PMD_TAP_MAX_QUEUES);
955 if (dev->data->nb_tx_queues > RTE_PMD_TAP_MAX_QUEUES) {
957 "%s: number of tx queues %d exceeds max num of queues %d",
959 dev->data->nb_tx_queues,
960 RTE_PMD_TAP_MAX_QUEUES);
964 TAP_LOG(INFO, "%s: %s: TX configured queues number: %u",
965 dev->device->name, pmd->name, dev->data->nb_tx_queues);
967 TAP_LOG(INFO, "%s: %s: RX configured queues number: %u",
968 dev->device->name, pmd->name, dev->data->nb_rx_queues);
974 tap_dev_speed_capa(void)
976 uint32_t speed = pmd_link.link_speed;
979 if (speed >= ETH_SPEED_NUM_10M)
980 capa |= ETH_LINK_SPEED_10M;
981 if (speed >= ETH_SPEED_NUM_100M)
982 capa |= ETH_LINK_SPEED_100M;
983 if (speed >= ETH_SPEED_NUM_1G)
984 capa |= ETH_LINK_SPEED_1G;
985 if (speed >= ETH_SPEED_NUM_5G)
986 capa |= ETH_LINK_SPEED_2_5G;
987 if (speed >= ETH_SPEED_NUM_5G)
988 capa |= ETH_LINK_SPEED_5G;
989 if (speed >= ETH_SPEED_NUM_10G)
990 capa |= ETH_LINK_SPEED_10G;
991 if (speed >= ETH_SPEED_NUM_20G)
992 capa |= ETH_LINK_SPEED_20G;
993 if (speed >= ETH_SPEED_NUM_25G)
994 capa |= ETH_LINK_SPEED_25G;
995 if (speed >= ETH_SPEED_NUM_40G)
996 capa |= ETH_LINK_SPEED_40G;
997 if (speed >= ETH_SPEED_NUM_50G)
998 capa |= ETH_LINK_SPEED_50G;
999 if (speed >= ETH_SPEED_NUM_56G)
1000 capa |= ETH_LINK_SPEED_56G;
1001 if (speed >= ETH_SPEED_NUM_100G)
1002 capa |= ETH_LINK_SPEED_100G;
1008 tap_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
1010 struct pmd_internals *internals = dev->data->dev_private;
1012 dev_info->if_index = internals->if_index;
1013 dev_info->max_mac_addrs = 1;
1014 dev_info->max_rx_pktlen = (uint32_t)RTE_ETHER_MAX_VLAN_FRAME_LEN;
1015 dev_info->max_rx_queues = RTE_PMD_TAP_MAX_QUEUES;
1016 dev_info->max_tx_queues = RTE_PMD_TAP_MAX_QUEUES;
1017 dev_info->min_rx_bufsize = 0;
1018 dev_info->speed_capa = tap_dev_speed_capa();
1019 dev_info->rx_queue_offload_capa = tap_rx_offload_get_queue_capa();
1020 dev_info->rx_offload_capa = tap_rx_offload_get_port_capa() |
1021 dev_info->rx_queue_offload_capa;
1022 dev_info->tx_queue_offload_capa = tap_tx_offload_get_queue_capa();
1023 dev_info->tx_offload_capa = tap_tx_offload_get_port_capa() |
1024 dev_info->tx_queue_offload_capa;
1025 dev_info->hash_key_size = TAP_RSS_HASH_KEY_SIZE;
1027 * limitation: TAP supports all of IP, UDP and TCP hash
1028 * functions together and not in partial combinations
1030 dev_info->flow_type_rss_offloads = ~TAP_RSS_HF_MASK;
1036 tap_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *tap_stats)
1038 unsigned int i, imax;
1039 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
1040 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
1041 unsigned long rx_nombuf = 0, ierrors = 0;
1042 const struct pmd_internals *pmd = dev->data->dev_private;
1044 /* rx queue statistics */
1045 imax = (dev->data->nb_rx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
1046 dev->data->nb_rx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
1047 for (i = 0; i < imax; i++) {
1048 tap_stats->q_ipackets[i] = pmd->rxq[i].stats.ipackets;
1049 tap_stats->q_ibytes[i] = pmd->rxq[i].stats.ibytes;
1050 rx_total += tap_stats->q_ipackets[i];
1051 rx_bytes_total += tap_stats->q_ibytes[i];
1052 rx_nombuf += pmd->rxq[i].stats.rx_nombuf;
1053 ierrors += pmd->rxq[i].stats.ierrors;
1056 /* tx queue statistics */
1057 imax = (dev->data->nb_tx_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS) ?
1058 dev->data->nb_tx_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS;
1060 for (i = 0; i < imax; i++) {
1061 tap_stats->q_opackets[i] = pmd->txq[i].stats.opackets;
1062 tap_stats->q_obytes[i] = pmd->txq[i].stats.obytes;
1063 tx_total += tap_stats->q_opackets[i];
1064 tx_err_total += pmd->txq[i].stats.errs;
1065 tx_bytes_total += tap_stats->q_obytes[i];
1068 tap_stats->ipackets = rx_total;
1069 tap_stats->ibytes = rx_bytes_total;
1070 tap_stats->ierrors = ierrors;
1071 tap_stats->rx_nombuf = rx_nombuf;
1072 tap_stats->opackets = tx_total;
1073 tap_stats->oerrors = tx_err_total;
1074 tap_stats->obytes = tx_bytes_total;
1079 tap_stats_reset(struct rte_eth_dev *dev)
1082 struct pmd_internals *pmd = dev->data->dev_private;
1084 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1085 pmd->rxq[i].stats.ipackets = 0;
1086 pmd->rxq[i].stats.ibytes = 0;
1087 pmd->rxq[i].stats.ierrors = 0;
1088 pmd->rxq[i].stats.rx_nombuf = 0;
1090 pmd->txq[i].stats.opackets = 0;
1091 pmd->txq[i].stats.errs = 0;
1092 pmd->txq[i].stats.obytes = 0;
1099 tap_dev_close(struct rte_eth_dev *dev)
1102 struct pmd_internals *internals = dev->data->dev_private;
1103 struct pmd_process_private *process_private = dev->process_private;
1104 struct rx_queue *rxq;
1106 if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
1107 rte_free(dev->process_private);
1111 tap_link_set_down(dev);
1112 if (internals->nlsk_fd != -1) {
1113 tap_flow_flush(dev, NULL);
1114 tap_flow_implicit_flush(internals, NULL);
1115 tap_nl_final(internals->nlsk_fd);
1116 internals->nlsk_fd = -1;
1119 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1120 if (process_private->rxq_fds[i] != -1) {
1121 rxq = &internals->rxq[i];
1122 close(process_private->rxq_fds[i]);
1123 process_private->rxq_fds[i] = -1;
1124 tap_rxq_pool_free(rxq->pool);
1125 rte_free(rxq->iovecs);
1129 if (process_private->txq_fds[i] != -1) {
1130 close(process_private->txq_fds[i]);
1131 process_private->txq_fds[i] = -1;
1135 if (internals->remote_if_index) {
1136 /* Restore initial remote state */
1137 ioctl(internals->ioctl_sock, SIOCSIFFLAGS,
1138 &internals->remote_initial_flags);
1141 rte_mempool_free(internals->gso_ctx_mp);
1142 internals->gso_ctx_mp = NULL;
1144 if (internals->ka_fd != -1) {
1145 close(internals->ka_fd);
1146 internals->ka_fd = -1;
1149 /* mac_addrs must not be freed alone because part of dev_private */
1150 dev->data->mac_addrs = NULL;
1152 internals = dev->data->dev_private;
1153 TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
1154 tuntap_types[internals->type], rte_socket_id());
1156 if (internals->ioctl_sock != -1) {
1157 close(internals->ioctl_sock);
1158 internals->ioctl_sock = -1;
1160 rte_free(dev->process_private);
1161 if (tap_devices_count == 1)
1162 rte_mp_action_unregister(TAP_MP_KEY);
1163 tap_devices_count--;
1165 * Since TUN device has no more opened file descriptors
1166 * it will be removed from kernel
1173 tap_rx_queue_release(void *queue)
1175 struct rx_queue *rxq = queue;
1176 struct pmd_process_private *process_private;
1180 process_private = rte_eth_devices[rxq->in_port].process_private;
1181 if (process_private->rxq_fds[rxq->queue_id] != -1) {
1182 close(process_private->rxq_fds[rxq->queue_id]);
1183 process_private->rxq_fds[rxq->queue_id] = -1;
1184 tap_rxq_pool_free(rxq->pool);
1185 rte_free(rxq->iovecs);
1192 tap_tx_queue_release(void *queue)
1194 struct tx_queue *txq = queue;
1195 struct pmd_process_private *process_private;
1199 process_private = rte_eth_devices[txq->out_port].process_private;
1201 if (process_private->txq_fds[txq->queue_id] != -1) {
1202 close(process_private->txq_fds[txq->queue_id]);
1203 process_private->txq_fds[txq->queue_id] = -1;
1208 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
1210 struct rte_eth_link *dev_link = &dev->data->dev_link;
1211 struct pmd_internals *pmd = dev->data->dev_private;
1212 struct ifreq ifr = { .ifr_flags = 0 };
1214 if (pmd->remote_if_index) {
1215 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
1216 if (!(ifr.ifr_flags & IFF_UP) ||
1217 !(ifr.ifr_flags & IFF_RUNNING)) {
1218 dev_link->link_status = ETH_LINK_DOWN;
1222 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
1223 dev_link->link_status =
1224 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
1231 tap_promisc_enable(struct rte_eth_dev *dev)
1233 struct pmd_internals *pmd = dev->data->dev_private;
1234 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1237 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1241 if (pmd->remote_if_index && !pmd->flow_isolate) {
1242 dev->data->promiscuous = 1;
1243 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
1245 /* Rollback promisc flag */
1246 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1248 * rte_eth_dev_promiscuous_enable() rollback
1249 * dev->data->promiscuous in the case of failure.
1259 tap_promisc_disable(struct rte_eth_dev *dev)
1261 struct pmd_internals *pmd = dev->data->dev_private;
1262 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1265 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1269 if (pmd->remote_if_index && !pmd->flow_isolate) {
1270 dev->data->promiscuous = 0;
1271 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
1273 /* Rollback promisc flag */
1274 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1276 * rte_eth_dev_promiscuous_disable() rollback
1277 * dev->data->promiscuous in the case of failure.
1287 tap_allmulti_enable(struct rte_eth_dev *dev)
1289 struct pmd_internals *pmd = dev->data->dev_private;
1290 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1293 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1297 if (pmd->remote_if_index && !pmd->flow_isolate) {
1298 dev->data->all_multicast = 1;
1299 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
1301 /* Rollback allmulti flag */
1302 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1304 * rte_eth_dev_allmulticast_enable() rollback
1305 * dev->data->all_multicast in the case of failure.
1315 tap_allmulti_disable(struct rte_eth_dev *dev)
1317 struct pmd_internals *pmd = dev->data->dev_private;
1318 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1321 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1325 if (pmd->remote_if_index && !pmd->flow_isolate) {
1326 dev->data->all_multicast = 0;
1327 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
1329 /* Rollback allmulti flag */
1330 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1332 * rte_eth_dev_allmulticast_disable() rollback
1333 * dev->data->all_multicast in the case of failure.
1343 tap_mac_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1345 struct pmd_internals *pmd = dev->data->dev_private;
1346 enum ioctl_mode mode = LOCAL_ONLY;
1350 if (pmd->type == ETH_TUNTAP_TYPE_TUN) {
1351 TAP_LOG(ERR, "%s: can't MAC address for TUN",
1356 if (rte_is_zero_ether_addr(mac_addr)) {
1357 TAP_LOG(ERR, "%s: can't set an empty MAC address",
1361 /* Check the actual current MAC address on the tap netdevice */
1362 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
1365 if (rte_is_same_ether_addr(
1366 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1369 /* Check the current MAC address on the remote */
1370 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
1373 if (!rte_is_same_ether_addr(
1374 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1376 mode = LOCAL_AND_REMOTE;
1377 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1378 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, RTE_ETHER_ADDR_LEN);
1379 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
1382 rte_memcpy(&pmd->eth_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1383 if (pmd->remote_if_index && !pmd->flow_isolate) {
1384 /* Replace MAC redirection rule after a MAC change */
1385 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
1388 "%s: Couldn't delete MAC redirection rule",
1392 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
1395 "%s: Couldn't add MAC redirection rule",
1405 tap_gso_ctx_setup(struct rte_gso_ctx *gso_ctx, struct rte_eth_dev *dev)
1409 struct pmd_internals *pmd = dev->data->dev_private;
1412 /* initialize GSO context */
1413 gso_types = DEV_TX_OFFLOAD_TCP_TSO;
1414 if (!pmd->gso_ctx_mp) {
1416 * Create private mbuf pool with TAP_GSO_MBUF_SEG_SIZE
1417 * bytes size per mbuf use this pool for both direct and
1420 ret = snprintf(pool_name, sizeof(pool_name), "mp_%s",
1422 if (ret < 0 || ret >= (int)sizeof(pool_name)) {
1424 "%s: failed to create mbuf pool name for device %s,"
1425 "device name too long or output error, ret: %d\n",
1426 pmd->name, dev->device->name, ret);
1427 return -ENAMETOOLONG;
1429 pmd->gso_ctx_mp = rte_pktmbuf_pool_create(pool_name,
1430 TAP_GSO_MBUFS_NUM, TAP_GSO_MBUF_CACHE_SIZE, 0,
1431 RTE_PKTMBUF_HEADROOM + TAP_GSO_MBUF_SEG_SIZE,
1433 if (!pmd->gso_ctx_mp) {
1435 "%s: failed to create mbuf pool for device %s\n",
1436 pmd->name, dev->device->name);
1441 gso_ctx->direct_pool = pmd->gso_ctx_mp;
1442 gso_ctx->indirect_pool = pmd->gso_ctx_mp;
1443 gso_ctx->gso_types = gso_types;
1444 gso_ctx->gso_size = 0; /* gso_size is set in tx_burst() per packet */
1451 tap_setup_queue(struct rte_eth_dev *dev,
1452 struct pmd_internals *internals,
1460 struct pmd_internals *pmd = dev->data->dev_private;
1461 struct pmd_process_private *process_private = dev->process_private;
1462 struct rx_queue *rx = &internals->rxq[qid];
1463 struct tx_queue *tx = &internals->txq[qid];
1464 struct rte_gso_ctx *gso_ctx;
1467 fd = &process_private->rxq_fds[qid];
1468 other_fd = &process_private->txq_fds[qid];
1472 fd = &process_private->txq_fds[qid];
1473 other_fd = &process_private->rxq_fds[qid];
1475 gso_ctx = &tx->gso_ctx;
1478 /* fd for this queue already exists */
1479 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1480 pmd->name, *fd, dir, qid);
1482 } else if (*other_fd != -1) {
1483 /* Only other_fd exists. dup it */
1484 *fd = dup(*other_fd);
1487 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1490 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1491 pmd->name, *other_fd, dir, qid, *fd);
1493 /* Both RX and TX fds do not exist (equal -1). Create fd */
1494 *fd = tun_alloc(pmd, 0);
1496 *fd = -1; /* restore original value */
1497 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1500 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1501 pmd->name, dir, qid, *fd);
1504 tx->mtu = &dev->data->mtu;
1505 rx->rxmode = &dev->data->dev_conf.rxmode;
1507 ret = tap_gso_ctx_setup(gso_ctx, dev);
1512 tx->type = pmd->type;
1518 tap_rx_queue_setup(struct rte_eth_dev *dev,
1519 uint16_t rx_queue_id,
1520 uint16_t nb_rx_desc,
1521 unsigned int socket_id,
1522 const struct rte_eth_rxconf *rx_conf __rte_unused,
1523 struct rte_mempool *mp)
1525 struct pmd_internals *internals = dev->data->dev_private;
1526 struct pmd_process_private *process_private = dev->process_private;
1527 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1528 struct rte_mbuf **tmp = &rxq->pool;
1529 long iov_max = sysconf(_SC_IOV_MAX);
1533 "_SC_IOV_MAX is not defined. Using %d as default",
1534 TAP_IOV_DEFAULT_MAX);
1535 iov_max = TAP_IOV_DEFAULT_MAX;
1537 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1538 struct iovec (*iovecs)[nb_desc + 1];
1539 int data_off = RTE_PKTMBUF_HEADROOM;
1544 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1546 "nb_rx_queues %d too small or mempool NULL",
1547 dev->data->nb_rx_queues);
1552 rxq->trigger_seen = 1; /* force initial burst */
1553 rxq->in_port = dev->data->port_id;
1554 rxq->queue_id = rx_queue_id;
1555 rxq->nb_rx_desc = nb_desc;
1556 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1560 "%s: Couldn't allocate %d RX descriptors",
1561 dev->device->name, nb_desc);
1564 rxq->iovecs = iovecs;
1566 dev->data->rx_queues[rx_queue_id] = rxq;
1567 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1573 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1574 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1576 for (i = 1; i <= nb_desc; i++) {
1577 *tmp = rte_pktmbuf_alloc(rxq->mp);
1580 "%s: couldn't allocate memory for queue %d",
1581 dev->device->name, rx_queue_id);
1585 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1586 (*rxq->iovecs)[i].iov_base =
1587 (char *)(*tmp)->buf_addr + data_off;
1589 tmp = &(*tmp)->next;
1592 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1593 internals->name, rx_queue_id,
1594 process_private->rxq_fds[rx_queue_id]);
1599 tap_rxq_pool_free(rxq->pool);
1601 rte_free(rxq->iovecs);
1607 tap_tx_queue_setup(struct rte_eth_dev *dev,
1608 uint16_t tx_queue_id,
1609 uint16_t nb_tx_desc __rte_unused,
1610 unsigned int socket_id __rte_unused,
1611 const struct rte_eth_txconf *tx_conf)
1613 struct pmd_internals *internals = dev->data->dev_private;
1614 struct pmd_process_private *process_private = dev->process_private;
1615 struct tx_queue *txq;
1619 if (tx_queue_id >= dev->data->nb_tx_queues)
1621 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1622 txq = dev->data->tx_queues[tx_queue_id];
1623 txq->out_port = dev->data->port_id;
1624 txq->queue_id = tx_queue_id;
1626 offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1627 txq->csum = !!(offloads &
1628 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1629 DEV_TX_OFFLOAD_UDP_CKSUM |
1630 DEV_TX_OFFLOAD_TCP_CKSUM));
1632 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1636 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1637 internals->name, tx_queue_id,
1638 process_private->txq_fds[tx_queue_id],
1639 txq->csum ? "on" : "off");
1645 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1647 struct pmd_internals *pmd = dev->data->dev_private;
1648 struct ifreq ifr = { .ifr_mtu = mtu };
1651 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1653 dev->data->mtu = mtu;
1659 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1660 struct rte_ether_addr *mc_addr_set __rte_unused,
1661 uint32_t nb_mc_addr __rte_unused)
1664 * Nothing to do actually: the tap has no filtering whatsoever, every
1665 * packet is received.
1671 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1673 struct rte_eth_dev *dev = arg;
1674 struct pmd_internals *pmd = dev->data->dev_private;
1675 struct ifinfomsg *info = NLMSG_DATA(nh);
1677 if (nh->nlmsg_type != RTM_NEWLINK ||
1678 (info->ifi_index != pmd->if_index &&
1679 info->ifi_index != pmd->remote_if_index))
1681 return tap_link_update(dev, 0);
1685 tap_dev_intr_handler(void *cb_arg)
1687 struct rte_eth_dev *dev = cb_arg;
1688 struct pmd_internals *pmd = dev->data->dev_private;
1690 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1694 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1696 struct pmd_internals *pmd = dev->data->dev_private;
1699 /* In any case, disable interrupt if the conf is no longer there. */
1700 if (!dev->data->dev_conf.intr_conf.lsc) {
1701 if (pmd->intr_handle.fd != -1) {
1707 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1708 if (unlikely(pmd->intr_handle.fd == -1))
1710 return rte_intr_callback_register(
1711 &pmd->intr_handle, tap_dev_intr_handler, dev);
1716 ret = rte_intr_callback_unregister(&pmd->intr_handle,
1717 tap_dev_intr_handler, dev);
1720 } else if (ret == -EAGAIN) {
1723 TAP_LOG(ERR, "intr callback unregister failed: %d",
1729 tap_nl_final(pmd->intr_handle.fd);
1730 pmd->intr_handle.fd = -1;
1736 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1740 err = tap_lsc_intr_handle_set(dev, set);
1743 tap_rx_intr_vec_set(dev, 0);
1746 err = tap_rx_intr_vec_set(dev, set);
1748 tap_lsc_intr_handle_set(dev, 0);
1752 static const uint32_t*
1753 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1755 static const uint32_t ptypes[] = {
1756 RTE_PTYPE_INNER_L2_ETHER,
1757 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1758 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1759 RTE_PTYPE_INNER_L3_IPV4,
1760 RTE_PTYPE_INNER_L3_IPV4_EXT,
1761 RTE_PTYPE_INNER_L3_IPV6,
1762 RTE_PTYPE_INNER_L3_IPV6_EXT,
1763 RTE_PTYPE_INNER_L4_FRAG,
1764 RTE_PTYPE_INNER_L4_UDP,
1765 RTE_PTYPE_INNER_L4_TCP,
1766 RTE_PTYPE_INNER_L4_SCTP,
1768 RTE_PTYPE_L2_ETHER_VLAN,
1769 RTE_PTYPE_L2_ETHER_QINQ,
1771 RTE_PTYPE_L3_IPV4_EXT,
1772 RTE_PTYPE_L3_IPV6_EXT,
1784 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1785 struct rte_eth_fc_conf *fc_conf)
1787 fc_conf->mode = RTE_FC_NONE;
1792 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1793 struct rte_eth_fc_conf *fc_conf)
1795 if (fc_conf->mode != RTE_FC_NONE)
1801 * DPDK callback to update the RSS hash configuration.
1804 * Pointer to Ethernet device structure.
1805 * @param[in] rss_conf
1806 * RSS configuration data.
1809 * 0 on success, a negative errno value otherwise and rte_errno is set.
1812 tap_rss_hash_update(struct rte_eth_dev *dev,
1813 struct rte_eth_rss_conf *rss_conf)
1815 if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
1819 if (rss_conf->rss_key && rss_conf->rss_key_len) {
1821 * Currently TAP RSS key is hard coded
1822 * and cannot be updated
1825 "port %u RSS key cannot be updated",
1826 dev->data->port_id);
1834 tap_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1836 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1842 tap_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1844 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1850 tap_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1852 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1858 tap_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1860 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1864 static const struct eth_dev_ops ops = {
1865 .dev_start = tap_dev_start,
1866 .dev_stop = tap_dev_stop,
1867 .dev_close = tap_dev_close,
1868 .dev_configure = tap_dev_configure,
1869 .dev_infos_get = tap_dev_info,
1870 .rx_queue_setup = tap_rx_queue_setup,
1871 .tx_queue_setup = tap_tx_queue_setup,
1872 .rx_queue_start = tap_rx_queue_start,
1873 .tx_queue_start = tap_tx_queue_start,
1874 .rx_queue_stop = tap_rx_queue_stop,
1875 .tx_queue_stop = tap_tx_queue_stop,
1876 .rx_queue_release = tap_rx_queue_release,
1877 .tx_queue_release = tap_tx_queue_release,
1878 .flow_ctrl_get = tap_flow_ctrl_get,
1879 .flow_ctrl_set = tap_flow_ctrl_set,
1880 .link_update = tap_link_update,
1881 .dev_set_link_up = tap_link_set_up,
1882 .dev_set_link_down = tap_link_set_down,
1883 .promiscuous_enable = tap_promisc_enable,
1884 .promiscuous_disable = tap_promisc_disable,
1885 .allmulticast_enable = tap_allmulti_enable,
1886 .allmulticast_disable = tap_allmulti_disable,
1887 .mac_addr_set = tap_mac_set,
1888 .mtu_set = tap_mtu_set,
1889 .set_mc_addr_list = tap_set_mc_addr_list,
1890 .stats_get = tap_stats_get,
1891 .stats_reset = tap_stats_reset,
1892 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1893 .rss_hash_update = tap_rss_hash_update,
1894 .flow_ops_get = tap_dev_flow_ops_get,
1898 eth_dev_tap_create(struct rte_vdev_device *vdev, const char *tap_name,
1899 char *remote_iface, struct rte_ether_addr *mac_addr,
1900 enum rte_tuntap_type type)
1902 int numa_node = rte_socket_id();
1903 struct rte_eth_dev *dev;
1904 struct pmd_internals *pmd;
1905 struct pmd_process_private *process_private;
1906 const char *tuntap_name = tuntap_types[type];
1907 struct rte_eth_dev_data *data;
1911 TAP_LOG(DEBUG, "%s device on numa %u", tuntap_name, rte_socket_id());
1913 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1915 TAP_LOG(ERR, "%s Unable to allocate device struct",
1917 goto error_exit_nodev;
1920 process_private = (struct pmd_process_private *)
1921 rte_zmalloc_socket(tap_name, sizeof(struct pmd_process_private),
1922 RTE_CACHE_LINE_SIZE, dev->device->numa_node);
1924 if (process_private == NULL) {
1925 TAP_LOG(ERR, "Failed to alloc memory for process private");
1928 pmd = dev->data->dev_private;
1929 dev->process_private = process_private;
1931 strlcpy(pmd->name, tap_name, sizeof(pmd->name));
1935 pmd->gso_ctx_mp = NULL;
1937 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1938 if (pmd->ioctl_sock == -1) {
1940 "%s Unable to get a socket for management: %s",
1941 tuntap_name, strerror(errno));
1945 /* Setup some default values */
1947 data->dev_private = pmd;
1948 data->dev_flags = RTE_ETH_DEV_INTR_LSC |
1949 RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1950 data->numa_node = numa_node;
1952 data->dev_link = pmd_link;
1953 data->mac_addrs = &pmd->eth_addr;
1954 /* Set the number of RX and TX queues */
1955 data->nb_rx_queues = 0;
1956 data->nb_tx_queues = 0;
1958 dev->dev_ops = &ops;
1959 dev->rx_pkt_burst = pmd_rx_burst;
1960 dev->tx_pkt_burst = pmd_tx_burst;
1962 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1963 pmd->intr_handle.fd = -1;
1964 dev->intr_handle = &pmd->intr_handle;
1966 /* Presetup the fds to -1 as being not valid */
1967 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1968 process_private->rxq_fds[i] = -1;
1969 process_private->txq_fds[i] = -1;
1972 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1973 if (rte_is_zero_ether_addr(mac_addr))
1974 rte_eth_random_addr((uint8_t *)&pmd->eth_addr);
1976 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1980 * Allocate a TUN device keep-alive file descriptor that will only be
1981 * closed when the TUN device itself is closed or removed.
1982 * This keep-alive file descriptor will guarantee that the TUN device
1983 * exists even when all of its queues are closed
1985 pmd->ka_fd = tun_alloc(pmd, 1);
1986 if (pmd->ka_fd == -1) {
1987 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
1990 TAP_LOG(DEBUG, "allocated %s", pmd->name);
1992 ifr.ifr_mtu = dev->data->mtu;
1993 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1996 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1997 memset(&ifr, 0, sizeof(struct ifreq));
1998 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1999 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
2000 RTE_ETHER_ADDR_LEN);
2001 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
2006 * Set up everything related to rte_flow:
2008 * - tap / remote if_index
2009 * - mandatory QDISCs
2010 * - rte_flow actual/implicit lists
2013 pmd->nlsk_fd = tap_nl_init(0);
2014 if (pmd->nlsk_fd == -1) {
2015 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
2017 goto disable_rte_flow;
2019 pmd->if_index = if_nametoindex(pmd->name);
2020 if (!pmd->if_index) {
2021 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
2022 goto disable_rte_flow;
2024 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
2025 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
2027 goto disable_rte_flow;
2029 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
2030 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
2032 goto disable_rte_flow;
2034 LIST_INIT(&pmd->flows);
2036 if (strlen(remote_iface)) {
2037 pmd->remote_if_index = if_nametoindex(remote_iface);
2038 if (!pmd->remote_if_index) {
2039 TAP_LOG(ERR, "%s: failed to get %s if_index.",
2040 pmd->name, remote_iface);
2043 strlcpy(pmd->remote_iface, remote_iface, RTE_ETH_NAME_MAX_LEN);
2045 /* Save state of remote device */
2046 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
2048 /* Replicate remote MAC address */
2049 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
2050 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
2051 pmd->name, pmd->remote_iface);
2054 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
2055 RTE_ETHER_ADDR_LEN);
2056 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
2057 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
2058 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
2059 pmd->name, remote_iface);
2064 * Flush usually returns negative value because it tries to
2065 * delete every QDISC (and on a running device, one QDISC at
2066 * least is needed). Ignore negative return value.
2068 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
2069 if (qdisc_create_ingress(pmd->nlsk_fd,
2070 pmd->remote_if_index) < 0) {
2071 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
2075 LIST_INIT(&pmd->implicit_flows);
2076 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
2077 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
2078 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
2079 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
2081 "%s: failed to create implicit rules.",
2087 rte_eth_dev_probing_finish(dev);
2091 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
2092 strerror(errno), errno);
2093 if (strlen(remote_iface)) {
2094 TAP_LOG(ERR, "Remote feature requires flow support.");
2097 rte_eth_dev_probing_finish(dev);
2101 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
2102 strerror(errno), errno);
2103 tap_flow_implicit_flush(pmd, NULL);
2106 if (pmd->nlsk_fd != -1)
2107 close(pmd->nlsk_fd);
2108 if (pmd->ka_fd != -1)
2110 if (pmd->ioctl_sock != -1)
2111 close(pmd->ioctl_sock);
2112 /* mac_addrs must not be freed alone because part of dev_private */
2113 dev->data->mac_addrs = NULL;
2114 rte_eth_dev_release_port(dev);
2117 TAP_LOG(ERR, "%s Unable to initialize %s",
2118 tuntap_name, rte_vdev_device_name(vdev));
2123 /* make sure name is a possible Linux network device name */
2125 is_valid_iface(const char *name)
2130 if (strnlen(name, IFNAMSIZ) == IFNAMSIZ)
2134 if (*name == '/' || *name == ':' || isspace(*name))
2142 set_interface_name(const char *key __rte_unused,
2146 char *name = (char *)extra_args;
2149 if (!is_valid_iface(value)) {
2150 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2154 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2156 /* use tap%d which causes kernel to choose next available */
2157 strlcpy(name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2163 set_remote_iface(const char *key __rte_unused,
2167 char *name = (char *)extra_args;
2170 if (!is_valid_iface(value)) {
2171 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2175 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2181 static int parse_user_mac(struct rte_ether_addr *user_mac,
2184 unsigned int index = 0;
2185 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
2187 if (user_mac == NULL || value == NULL)
2190 strlcpy(mac_temp, value, sizeof(mac_temp));
2191 mac_byte = strtok(mac_temp, ":");
2193 while ((mac_byte != NULL) &&
2194 (strlen(mac_byte) <= 2) &&
2195 (strlen(mac_byte) == strspn(mac_byte,
2196 ETH_TAP_CMP_MAC_FMT))) {
2197 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
2198 mac_byte = strtok(NULL, ":");
2205 set_mac_type(const char *key __rte_unused,
2209 struct rte_ether_addr *user_mac = extra_args;
2214 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
2215 static int iface_idx;
2217 /* fixed mac = 00:64:74:61:70:<iface_idx> */
2218 memcpy((char *)user_mac->addr_bytes, "\0dtap",
2219 RTE_ETHER_ADDR_LEN);
2220 user_mac->addr_bytes[RTE_ETHER_ADDR_LEN - 1] =
2225 if (parse_user_mac(user_mac, value) != 6)
2228 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
2232 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
2233 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
2238 * Open a TUN interface device. TUN PMD
2239 * 1) sets tap_type as false
2240 * 2) intakes iface as argument.
2241 * 3) as interface is virtual set speed to 10G
2244 rte_pmd_tun_probe(struct rte_vdev_device *dev)
2246 const char *name, *params;
2248 struct rte_kvargs *kvlist = NULL;
2249 char tun_name[RTE_ETH_NAME_MAX_LEN];
2250 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2251 struct rte_eth_dev *eth_dev;
2253 name = rte_vdev_device_name(dev);
2254 params = rte_vdev_device_args(dev);
2255 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2257 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
2258 strlen(params) == 0) {
2259 eth_dev = rte_eth_dev_attach_secondary(name);
2261 TAP_LOG(ERR, "Failed to probe %s", name);
2264 eth_dev->dev_ops = &ops;
2265 eth_dev->device = &dev->device;
2266 rte_eth_dev_probing_finish(eth_dev);
2270 /* use tun%d which causes kernel to choose next available */
2271 strlcpy(tun_name, DEFAULT_TUN_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2273 if (params && (params[0] != '\0')) {
2274 TAP_LOG(DEBUG, "parameters (%s)", params);
2276 kvlist = rte_kvargs_parse(params, valid_arguments);
2278 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2279 ret = rte_kvargs_process(kvlist,
2281 &set_interface_name,
2289 pmd_link.link_speed = ETH_SPEED_NUM_10G;
2291 TAP_LOG(DEBUG, "Initializing pmd_tun for %s", name);
2293 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0,
2294 ETH_TUNTAP_TYPE_TUN);
2298 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2301 rte_kvargs_free(kvlist);
2306 /* Request queue file descriptors from secondary to primary. */
2308 tap_mp_attach_queues(const char *port_name, struct rte_eth_dev *dev)
2311 struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};
2312 struct rte_mp_msg request, *reply;
2313 struct rte_mp_reply replies;
2314 struct ipc_queues *request_param = (struct ipc_queues *)request.param;
2315 struct ipc_queues *reply_param;
2316 struct pmd_process_private *process_private = dev->process_private;
2317 int queue, fd_iterator;
2319 /* Prepare the request */
2320 memset(&request, 0, sizeof(request));
2321 strlcpy(request.name, TAP_MP_KEY, sizeof(request.name));
2322 strlcpy(request_param->port_name, port_name,
2323 sizeof(request_param->port_name));
2324 request.len_param = sizeof(*request_param);
2325 /* Send request and receive reply */
2326 ret = rte_mp_request_sync(&request, &replies, &timeout);
2327 if (ret < 0 || replies.nb_received != 1) {
2328 TAP_LOG(ERR, "Failed to request queues from primary: %d",
2332 reply = &replies.msgs[0];
2333 reply_param = (struct ipc_queues *)reply->param;
2334 TAP_LOG(DEBUG, "Received IPC reply for %s", reply_param->port_name);
2336 /* Attach the queues from received file descriptors */
2337 if (reply_param->rxq_count + reply_param->txq_count != reply->num_fds) {
2338 TAP_LOG(ERR, "Unexpected number of fds received");
2342 dev->data->nb_rx_queues = reply_param->rxq_count;
2343 dev->data->nb_tx_queues = reply_param->txq_count;
2345 for (queue = 0; queue < reply_param->rxq_count; queue++)
2346 process_private->rxq_fds[queue] = reply->fds[fd_iterator++];
2347 for (queue = 0; queue < reply_param->txq_count; queue++)
2348 process_private->txq_fds[queue] = reply->fds[fd_iterator++];
2353 /* Send the queue file descriptors from the primary process to secondary. */
2355 tap_mp_sync_queues(const struct rte_mp_msg *request, const void *peer)
2357 struct rte_eth_dev *dev;
2358 struct pmd_process_private *process_private;
2359 struct rte_mp_msg reply;
2360 const struct ipc_queues *request_param =
2361 (const struct ipc_queues *)request->param;
2362 struct ipc_queues *reply_param =
2363 (struct ipc_queues *)reply.param;
2368 /* Get requested port */
2369 TAP_LOG(DEBUG, "Received IPC request for %s", request_param->port_name);
2370 ret = rte_eth_dev_get_port_by_name(request_param->port_name, &port_id);
2372 TAP_LOG(ERR, "Failed to get port id for %s",
2373 request_param->port_name);
2376 dev = &rte_eth_devices[port_id];
2377 process_private = dev->process_private;
2379 /* Fill file descriptors for all queues */
2381 reply_param->rxq_count = 0;
2382 if (dev->data->nb_rx_queues + dev->data->nb_tx_queues >
2384 TAP_LOG(ERR, "Number of rx/tx queues exceeds max number of fds");
2388 for (queue = 0; queue < dev->data->nb_rx_queues; queue++) {
2389 reply.fds[reply.num_fds++] = process_private->rxq_fds[queue];
2390 reply_param->rxq_count++;
2392 RTE_ASSERT(reply_param->rxq_count == dev->data->nb_rx_queues);
2394 reply_param->txq_count = 0;
2395 for (queue = 0; queue < dev->data->nb_tx_queues; queue++) {
2396 reply.fds[reply.num_fds++] = process_private->txq_fds[queue];
2397 reply_param->txq_count++;
2399 RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
2402 strlcpy(reply.name, request->name, sizeof(reply.name));
2403 strlcpy(reply_param->port_name, request_param->port_name,
2404 sizeof(reply_param->port_name));
2405 reply.len_param = sizeof(*reply_param);
2406 if (rte_mp_reply(&reply, peer) < 0) {
2407 TAP_LOG(ERR, "Failed to reply an IPC request to sync queues");
2413 /* Open a TAP interface device.
2416 rte_pmd_tap_probe(struct rte_vdev_device *dev)
2418 const char *name, *params;
2420 struct rte_kvargs *kvlist = NULL;
2422 char tap_name[RTE_ETH_NAME_MAX_LEN];
2423 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2424 struct rte_ether_addr user_mac = { .addr_bytes = {0} };
2425 struct rte_eth_dev *eth_dev;
2426 int tap_devices_count_increased = 0;
2428 name = rte_vdev_device_name(dev);
2429 params = rte_vdev_device_args(dev);
2431 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
2432 eth_dev = rte_eth_dev_attach_secondary(name);
2434 TAP_LOG(ERR, "Failed to probe %s", name);
2437 eth_dev->dev_ops = &ops;
2438 eth_dev->device = &dev->device;
2439 eth_dev->rx_pkt_burst = pmd_rx_burst;
2440 eth_dev->tx_pkt_burst = pmd_tx_burst;
2441 if (!rte_eal_primary_proc_alive(NULL)) {
2442 TAP_LOG(ERR, "Primary process is missing");
2445 eth_dev->process_private = (struct pmd_process_private *)
2446 rte_zmalloc_socket(name,
2447 sizeof(struct pmd_process_private),
2448 RTE_CACHE_LINE_SIZE,
2449 eth_dev->device->numa_node);
2450 if (eth_dev->process_private == NULL) {
2452 "Failed to alloc memory for process private");
2456 ret = tap_mp_attach_queues(name, eth_dev);
2459 rte_eth_dev_probing_finish(eth_dev);
2463 speed = ETH_SPEED_NUM_10G;
2465 /* use tap%d which causes kernel to choose next available */
2466 strlcpy(tap_name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2467 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2469 if (params && (params[0] != '\0')) {
2470 TAP_LOG(DEBUG, "parameters (%s)", params);
2472 kvlist = rte_kvargs_parse(params, valid_arguments);
2474 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2475 ret = rte_kvargs_process(kvlist,
2477 &set_interface_name,
2483 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
2484 ret = rte_kvargs_process(kvlist,
2492 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
2493 ret = rte_kvargs_process(kvlist,
2502 pmd_link.link_speed = speed;
2504 TAP_LOG(DEBUG, "Initializing pmd_tap for %s", name);
2506 /* Register IPC feed callback */
2507 if (!tap_devices_count) {
2508 ret = rte_mp_action_register(TAP_MP_KEY, tap_mp_sync_queues);
2509 if (ret < 0 && rte_errno != ENOTSUP) {
2510 TAP_LOG(ERR, "tap: Failed to register IPC callback: %s",
2511 strerror(rte_errno));
2515 tap_devices_count++;
2516 tap_devices_count_increased = 1;
2517 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac,
2518 ETH_TUNTAP_TYPE_TAP);
2522 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2524 if (tap_devices_count_increased == 1) {
2525 if (tap_devices_count == 1)
2526 rte_mp_action_unregister(TAP_MP_KEY);
2527 tap_devices_count--;
2530 rte_kvargs_free(kvlist);
2535 /* detach a TUNTAP device.
2538 rte_pmd_tap_remove(struct rte_vdev_device *dev)
2540 struct rte_eth_dev *eth_dev = NULL;
2542 /* find the ethdev entry */
2543 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
2547 tap_dev_close(eth_dev);
2548 rte_eth_dev_release_port(eth_dev);
2553 static struct rte_vdev_driver pmd_tun_drv = {
2554 .probe = rte_pmd_tun_probe,
2555 .remove = rte_pmd_tap_remove,
2558 static struct rte_vdev_driver pmd_tap_drv = {
2559 .probe = rte_pmd_tap_probe,
2560 .remove = rte_pmd_tap_remove,
2563 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
2564 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
2565 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
2566 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
2567 ETH_TAP_IFACE_ARG "=<string> ");
2568 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
2569 ETH_TAP_IFACE_ARG "=<string> "
2570 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
2571 ETH_TAP_REMOTE_ARG "=<string>");
2572 RTE_LOG_REGISTER(tap_logtype, pmd.net.tap, NOTICE);