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 rte_mempool_free(internals->gso_ctx_mp);
1109 internals->gso_ctx_mp = NULL;
1111 if (internals->ka_fd != -1) {
1112 close(internals->ka_fd);
1113 internals->ka_fd = -1;
1116 * Since TUN device has no more opened file descriptors
1117 * it will be removed from kernel
1122 tap_rx_queue_release(void *queue)
1124 struct rx_queue *rxq = queue;
1125 struct pmd_process_private *process_private;
1129 process_private = rte_eth_devices[rxq->in_port].process_private;
1130 if (process_private->rxq_fds[rxq->queue_id] != -1) {
1131 close(process_private->rxq_fds[rxq->queue_id]);
1132 process_private->rxq_fds[rxq->queue_id] = -1;
1133 tap_rxq_pool_free(rxq->pool);
1134 rte_free(rxq->iovecs);
1141 tap_tx_queue_release(void *queue)
1143 struct tx_queue *txq = queue;
1144 struct pmd_process_private *process_private;
1148 process_private = rte_eth_devices[txq->out_port].process_private;
1150 if (process_private->txq_fds[txq->queue_id] != -1) {
1151 close(process_private->txq_fds[txq->queue_id]);
1152 process_private->txq_fds[txq->queue_id] = -1;
1157 tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
1159 struct rte_eth_link *dev_link = &dev->data->dev_link;
1160 struct pmd_internals *pmd = dev->data->dev_private;
1161 struct ifreq ifr = { .ifr_flags = 0 };
1163 if (pmd->remote_if_index) {
1164 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, REMOTE_ONLY);
1165 if (!(ifr.ifr_flags & IFF_UP) ||
1166 !(ifr.ifr_flags & IFF_RUNNING)) {
1167 dev_link->link_status = ETH_LINK_DOWN;
1171 tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0, LOCAL_ONLY);
1172 dev_link->link_status =
1173 ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
1180 tap_promisc_enable(struct rte_eth_dev *dev)
1182 struct pmd_internals *pmd = dev->data->dev_private;
1183 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1186 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1190 if (pmd->remote_if_index && !pmd->flow_isolate) {
1191 dev->data->promiscuous = 1;
1192 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_PROMISC);
1194 /* Rollback promisc flag */
1195 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1197 * rte_eth_dev_promiscuous_enable() rollback
1198 * dev->data->promiscuous in the case of failure.
1208 tap_promisc_disable(struct rte_eth_dev *dev)
1210 struct pmd_internals *pmd = dev->data->dev_private;
1211 struct ifreq ifr = { .ifr_flags = IFF_PROMISC };
1214 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1218 if (pmd->remote_if_index && !pmd->flow_isolate) {
1219 dev->data->promiscuous = 0;
1220 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_PROMISC);
1222 /* Rollback promisc flag */
1223 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1225 * rte_eth_dev_promiscuous_disable() rollback
1226 * dev->data->promiscuous in the case of failure.
1236 tap_allmulti_enable(struct rte_eth_dev *dev)
1238 struct pmd_internals *pmd = dev->data->dev_private;
1239 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1242 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1246 if (pmd->remote_if_index && !pmd->flow_isolate) {
1247 dev->data->all_multicast = 1;
1248 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_ALLMULTI);
1250 /* Rollback allmulti flag */
1251 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1253 * rte_eth_dev_allmulticast_enable() rollback
1254 * dev->data->all_multicast in the case of failure.
1264 tap_allmulti_disable(struct rte_eth_dev *dev)
1266 struct pmd_internals *pmd = dev->data->dev_private;
1267 struct ifreq ifr = { .ifr_flags = IFF_ALLMULTI };
1270 ret = tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 0, LOCAL_AND_REMOTE);
1274 if (pmd->remote_if_index && !pmd->flow_isolate) {
1275 dev->data->all_multicast = 0;
1276 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_ALLMULTI);
1278 /* Rollback allmulti flag */
1279 tap_ioctl(pmd, SIOCSIFFLAGS, &ifr, 1, LOCAL_AND_REMOTE);
1281 * rte_eth_dev_allmulticast_disable() rollback
1282 * dev->data->all_multicast in the case of failure.
1292 tap_mac_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
1294 struct pmd_internals *pmd = dev->data->dev_private;
1295 enum ioctl_mode mode = LOCAL_ONLY;
1299 if (pmd->type == ETH_TUNTAP_TYPE_TUN) {
1300 TAP_LOG(ERR, "%s: can't MAC address for TUN",
1305 if (rte_is_zero_ether_addr(mac_addr)) {
1306 TAP_LOG(ERR, "%s: can't set an empty MAC address",
1310 /* Check the actual current MAC address on the tap netdevice */
1311 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, LOCAL_ONLY);
1314 if (rte_is_same_ether_addr(
1315 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1318 /* Check the current MAC address on the remote */
1319 ret = tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY);
1322 if (!rte_is_same_ether_addr(
1323 (struct rte_ether_addr *)&ifr.ifr_hwaddr.sa_data,
1325 mode = LOCAL_AND_REMOTE;
1326 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1327 rte_memcpy(ifr.ifr_hwaddr.sa_data, mac_addr, RTE_ETHER_ADDR_LEN);
1328 ret = tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 1, mode);
1331 rte_memcpy(&pmd->eth_addr, mac_addr, RTE_ETHER_ADDR_LEN);
1332 if (pmd->remote_if_index && !pmd->flow_isolate) {
1333 /* Replace MAC redirection rule after a MAC change */
1334 ret = tap_flow_implicit_destroy(pmd, TAP_REMOTE_LOCAL_MAC);
1337 "%s: Couldn't delete MAC redirection rule",
1341 ret = tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC);
1344 "%s: Couldn't add MAC redirection rule",
1354 tap_gso_ctx_setup(struct rte_gso_ctx *gso_ctx, struct rte_eth_dev *dev)
1358 struct pmd_internals *pmd = dev->data->dev_private;
1361 /* initialize GSO context */
1362 gso_types = DEV_TX_OFFLOAD_TCP_TSO;
1363 if (!pmd->gso_ctx_mp) {
1365 * Create private mbuf pool with TAP_GSO_MBUF_SEG_SIZE
1366 * bytes size per mbuf use this pool for both direct and
1369 ret = snprintf(pool_name, sizeof(pool_name), "mp_%s",
1371 if (ret < 0 || ret >= (int)sizeof(pool_name)) {
1373 "%s: failed to create mbuf pool name for device %s,"
1374 "device name too long or output error, ret: %d\n",
1375 pmd->name, dev->device->name, ret);
1376 return -ENAMETOOLONG;
1378 pmd->gso_ctx_mp = rte_pktmbuf_pool_create(pool_name,
1379 TAP_GSO_MBUFS_NUM, TAP_GSO_MBUF_CACHE_SIZE, 0,
1380 RTE_PKTMBUF_HEADROOM + TAP_GSO_MBUF_SEG_SIZE,
1382 if (!pmd->gso_ctx_mp) {
1384 "%s: failed to create mbuf pool for device %s\n",
1385 pmd->name, dev->device->name);
1390 gso_ctx->direct_pool = pmd->gso_ctx_mp;
1391 gso_ctx->indirect_pool = pmd->gso_ctx_mp;
1392 gso_ctx->gso_types = gso_types;
1393 gso_ctx->gso_size = 0; /* gso_size is set in tx_burst() per packet */
1400 tap_setup_queue(struct rte_eth_dev *dev,
1401 struct pmd_internals *internals,
1409 struct pmd_internals *pmd = dev->data->dev_private;
1410 struct pmd_process_private *process_private = dev->process_private;
1411 struct rx_queue *rx = &internals->rxq[qid];
1412 struct tx_queue *tx = &internals->txq[qid];
1413 struct rte_gso_ctx *gso_ctx;
1416 fd = &process_private->rxq_fds[qid];
1417 other_fd = &process_private->txq_fds[qid];
1421 fd = &process_private->txq_fds[qid];
1422 other_fd = &process_private->rxq_fds[qid];
1424 gso_ctx = &tx->gso_ctx;
1427 /* fd for this queue already exists */
1428 TAP_LOG(DEBUG, "%s: fd %d for %s queue qid %d exists",
1429 pmd->name, *fd, dir, qid);
1431 } else if (*other_fd != -1) {
1432 /* Only other_fd exists. dup it */
1433 *fd = dup(*other_fd);
1436 TAP_LOG(ERR, "%s: dup() failed.", pmd->name);
1439 TAP_LOG(DEBUG, "%s: dup fd %d for %s queue qid %d (%d)",
1440 pmd->name, *other_fd, dir, qid, *fd);
1442 /* Both RX and TX fds do not exist (equal -1). Create fd */
1443 *fd = tun_alloc(pmd, 0);
1445 *fd = -1; /* restore original value */
1446 TAP_LOG(ERR, "%s: tun_alloc() failed.", pmd->name);
1449 TAP_LOG(DEBUG, "%s: add %s queue for qid %d fd %d",
1450 pmd->name, dir, qid, *fd);
1453 tx->mtu = &dev->data->mtu;
1454 rx->rxmode = &dev->data->dev_conf.rxmode;
1456 ret = tap_gso_ctx_setup(gso_ctx, dev);
1461 tx->type = pmd->type;
1467 tap_rx_queue_setup(struct rte_eth_dev *dev,
1468 uint16_t rx_queue_id,
1469 uint16_t nb_rx_desc,
1470 unsigned int socket_id,
1471 const struct rte_eth_rxconf *rx_conf __rte_unused,
1472 struct rte_mempool *mp)
1474 struct pmd_internals *internals = dev->data->dev_private;
1475 struct pmd_process_private *process_private = dev->process_private;
1476 struct rx_queue *rxq = &internals->rxq[rx_queue_id];
1477 struct rte_mbuf **tmp = &rxq->pool;
1478 long iov_max = sysconf(_SC_IOV_MAX);
1482 "_SC_IOV_MAX is not defined. Using %d as default",
1483 TAP_IOV_DEFAULT_MAX);
1484 iov_max = TAP_IOV_DEFAULT_MAX;
1486 uint16_t nb_desc = RTE_MIN(nb_rx_desc, iov_max - 1);
1487 struct iovec (*iovecs)[nb_desc + 1];
1488 int data_off = RTE_PKTMBUF_HEADROOM;
1493 if (rx_queue_id >= dev->data->nb_rx_queues || !mp) {
1495 "nb_rx_queues %d too small or mempool NULL",
1496 dev->data->nb_rx_queues);
1501 rxq->trigger_seen = 1; /* force initial burst */
1502 rxq->in_port = dev->data->port_id;
1503 rxq->queue_id = rx_queue_id;
1504 rxq->nb_rx_desc = nb_desc;
1505 iovecs = rte_zmalloc_socket(dev->device->name, sizeof(*iovecs), 0,
1509 "%s: Couldn't allocate %d RX descriptors",
1510 dev->device->name, nb_desc);
1513 rxq->iovecs = iovecs;
1515 dev->data->rx_queues[rx_queue_id] = rxq;
1516 fd = tap_setup_queue(dev, internals, rx_queue_id, 1);
1522 (*rxq->iovecs)[0].iov_len = sizeof(struct tun_pi);
1523 (*rxq->iovecs)[0].iov_base = &rxq->pi;
1525 for (i = 1; i <= nb_desc; i++) {
1526 *tmp = rte_pktmbuf_alloc(rxq->mp);
1529 "%s: couldn't allocate memory for queue %d",
1530 dev->device->name, rx_queue_id);
1534 (*rxq->iovecs)[i].iov_len = (*tmp)->buf_len - data_off;
1535 (*rxq->iovecs)[i].iov_base =
1536 (char *)(*tmp)->buf_addr + data_off;
1538 tmp = &(*tmp)->next;
1541 TAP_LOG(DEBUG, " RX TUNTAP device name %s, qid %d on fd %d",
1542 internals->name, rx_queue_id,
1543 process_private->rxq_fds[rx_queue_id]);
1548 tap_rxq_pool_free(rxq->pool);
1550 rte_free(rxq->iovecs);
1556 tap_tx_queue_setup(struct rte_eth_dev *dev,
1557 uint16_t tx_queue_id,
1558 uint16_t nb_tx_desc __rte_unused,
1559 unsigned int socket_id __rte_unused,
1560 const struct rte_eth_txconf *tx_conf)
1562 struct pmd_internals *internals = dev->data->dev_private;
1563 struct pmd_process_private *process_private = dev->process_private;
1564 struct tx_queue *txq;
1568 if (tx_queue_id >= dev->data->nb_tx_queues)
1570 dev->data->tx_queues[tx_queue_id] = &internals->txq[tx_queue_id];
1571 txq = dev->data->tx_queues[tx_queue_id];
1572 txq->out_port = dev->data->port_id;
1573 txq->queue_id = tx_queue_id;
1575 offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
1576 txq->csum = !!(offloads &
1577 (DEV_TX_OFFLOAD_IPV4_CKSUM |
1578 DEV_TX_OFFLOAD_UDP_CKSUM |
1579 DEV_TX_OFFLOAD_TCP_CKSUM));
1581 ret = tap_setup_queue(dev, internals, tx_queue_id, 0);
1585 " TX TUNTAP device name %s, qid %d on fd %d csum %s",
1586 internals->name, tx_queue_id,
1587 process_private->txq_fds[tx_queue_id],
1588 txq->csum ? "on" : "off");
1594 tap_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
1596 struct pmd_internals *pmd = dev->data->dev_private;
1597 struct ifreq ifr = { .ifr_mtu = mtu };
1600 err = tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE);
1602 dev->data->mtu = mtu;
1608 tap_set_mc_addr_list(struct rte_eth_dev *dev __rte_unused,
1609 struct rte_ether_addr *mc_addr_set __rte_unused,
1610 uint32_t nb_mc_addr __rte_unused)
1613 * Nothing to do actually: the tap has no filtering whatsoever, every
1614 * packet is received.
1620 tap_nl_msg_handler(struct nlmsghdr *nh, void *arg)
1622 struct rte_eth_dev *dev = arg;
1623 struct pmd_internals *pmd = dev->data->dev_private;
1624 struct ifinfomsg *info = NLMSG_DATA(nh);
1626 if (nh->nlmsg_type != RTM_NEWLINK ||
1627 (info->ifi_index != pmd->if_index &&
1628 info->ifi_index != pmd->remote_if_index))
1630 return tap_link_update(dev, 0);
1634 tap_dev_intr_handler(void *cb_arg)
1636 struct rte_eth_dev *dev = cb_arg;
1637 struct pmd_internals *pmd = dev->data->dev_private;
1639 tap_nl_recv(pmd->intr_handle.fd, tap_nl_msg_handler, dev);
1643 tap_lsc_intr_handle_set(struct rte_eth_dev *dev, int set)
1645 struct pmd_internals *pmd = dev->data->dev_private;
1648 /* In any case, disable interrupt if the conf is no longer there. */
1649 if (!dev->data->dev_conf.intr_conf.lsc) {
1650 if (pmd->intr_handle.fd != -1) {
1656 pmd->intr_handle.fd = tap_nl_init(RTMGRP_LINK);
1657 if (unlikely(pmd->intr_handle.fd == -1))
1659 return rte_intr_callback_register(
1660 &pmd->intr_handle, tap_dev_intr_handler, dev);
1665 ret = rte_intr_callback_unregister(&pmd->intr_handle,
1666 tap_dev_intr_handler, dev);
1669 } else if (ret == -EAGAIN) {
1672 TAP_LOG(ERR, "intr callback unregister failed: %d",
1678 tap_nl_final(pmd->intr_handle.fd);
1679 pmd->intr_handle.fd = -1;
1685 tap_intr_handle_set(struct rte_eth_dev *dev, int set)
1689 err = tap_lsc_intr_handle_set(dev, set);
1692 tap_rx_intr_vec_set(dev, 0);
1695 err = tap_rx_intr_vec_set(dev, set);
1697 tap_lsc_intr_handle_set(dev, 0);
1701 static const uint32_t*
1702 tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
1704 static const uint32_t ptypes[] = {
1705 RTE_PTYPE_INNER_L2_ETHER,
1706 RTE_PTYPE_INNER_L2_ETHER_VLAN,
1707 RTE_PTYPE_INNER_L2_ETHER_QINQ,
1708 RTE_PTYPE_INNER_L3_IPV4,
1709 RTE_PTYPE_INNER_L3_IPV4_EXT,
1710 RTE_PTYPE_INNER_L3_IPV6,
1711 RTE_PTYPE_INNER_L3_IPV6_EXT,
1712 RTE_PTYPE_INNER_L4_FRAG,
1713 RTE_PTYPE_INNER_L4_UDP,
1714 RTE_PTYPE_INNER_L4_TCP,
1715 RTE_PTYPE_INNER_L4_SCTP,
1717 RTE_PTYPE_L2_ETHER_VLAN,
1718 RTE_PTYPE_L2_ETHER_QINQ,
1720 RTE_PTYPE_L3_IPV4_EXT,
1721 RTE_PTYPE_L3_IPV6_EXT,
1733 tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
1734 struct rte_eth_fc_conf *fc_conf)
1736 fc_conf->mode = RTE_FC_NONE;
1741 tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
1742 struct rte_eth_fc_conf *fc_conf)
1744 if (fc_conf->mode != RTE_FC_NONE)
1750 * DPDK callback to update the RSS hash configuration.
1753 * Pointer to Ethernet device structure.
1754 * @param[in] rss_conf
1755 * RSS configuration data.
1758 * 0 on success, a negative errno value otherwise and rte_errno is set.
1761 tap_rss_hash_update(struct rte_eth_dev *dev,
1762 struct rte_eth_rss_conf *rss_conf)
1764 if (rss_conf->rss_hf & TAP_RSS_HF_MASK) {
1768 if (rss_conf->rss_key && rss_conf->rss_key_len) {
1770 * Currently TAP RSS key is hard coded
1771 * and cannot be updated
1774 "port %u RSS key cannot be updated",
1775 dev->data->port_id);
1783 tap_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1785 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1791 tap_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1793 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
1799 tap_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1801 dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1807 tap_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
1809 dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
1813 static const struct eth_dev_ops ops = {
1814 .dev_start = tap_dev_start,
1815 .dev_stop = tap_dev_stop,
1816 .dev_close = tap_dev_close,
1817 .dev_configure = tap_dev_configure,
1818 .dev_infos_get = tap_dev_info,
1819 .rx_queue_setup = tap_rx_queue_setup,
1820 .tx_queue_setup = tap_tx_queue_setup,
1821 .rx_queue_start = tap_rx_queue_start,
1822 .tx_queue_start = tap_tx_queue_start,
1823 .rx_queue_stop = tap_rx_queue_stop,
1824 .tx_queue_stop = tap_tx_queue_stop,
1825 .rx_queue_release = tap_rx_queue_release,
1826 .tx_queue_release = tap_tx_queue_release,
1827 .flow_ctrl_get = tap_flow_ctrl_get,
1828 .flow_ctrl_set = tap_flow_ctrl_set,
1829 .link_update = tap_link_update,
1830 .dev_set_link_up = tap_link_set_up,
1831 .dev_set_link_down = tap_link_set_down,
1832 .promiscuous_enable = tap_promisc_enable,
1833 .promiscuous_disable = tap_promisc_disable,
1834 .allmulticast_enable = tap_allmulti_enable,
1835 .allmulticast_disable = tap_allmulti_disable,
1836 .mac_addr_set = tap_mac_set,
1837 .mtu_set = tap_mtu_set,
1838 .set_mc_addr_list = tap_set_mc_addr_list,
1839 .stats_get = tap_stats_get,
1840 .stats_reset = tap_stats_reset,
1841 .dev_supported_ptypes_get = tap_dev_supported_ptypes_get,
1842 .rss_hash_update = tap_rss_hash_update,
1843 .filter_ctrl = tap_dev_filter_ctrl,
1846 static const char *tuntap_types[ETH_TUNTAP_TYPE_MAX] = {
1847 "UNKNOWN", "TUN", "TAP"
1851 eth_dev_tap_create(struct rte_vdev_device *vdev, const char *tap_name,
1852 char *remote_iface, struct rte_ether_addr *mac_addr,
1853 enum rte_tuntap_type type)
1855 int numa_node = rte_socket_id();
1856 struct rte_eth_dev *dev;
1857 struct pmd_internals *pmd;
1858 struct pmd_process_private *process_private;
1859 const char *tuntap_name = tuntap_types[type];
1860 struct rte_eth_dev_data *data;
1864 TAP_LOG(DEBUG, "%s device on numa %u", tuntap_name, rte_socket_id());
1866 dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
1868 TAP_LOG(ERR, "%s Unable to allocate device struct",
1870 goto error_exit_nodev;
1873 process_private = (struct pmd_process_private *)
1874 rte_zmalloc_socket(tap_name, sizeof(struct pmd_process_private),
1875 RTE_CACHE_LINE_SIZE, dev->device->numa_node);
1877 if (process_private == NULL) {
1878 TAP_LOG(ERR, "Failed to alloc memory for process private");
1881 pmd = dev->data->dev_private;
1882 dev->process_private = process_private;
1884 strlcpy(pmd->name, tap_name, sizeof(pmd->name));
1888 pmd->gso_ctx_mp = NULL;
1890 pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
1891 if (pmd->ioctl_sock == -1) {
1893 "%s Unable to get a socket for management: %s",
1894 tuntap_name, strerror(errno));
1898 /* Setup some default values */
1900 data->dev_private = pmd;
1901 data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1902 data->numa_node = numa_node;
1904 data->dev_link = pmd_link;
1905 data->mac_addrs = &pmd->eth_addr;
1906 /* Set the number of RX and TX queues */
1907 data->nb_rx_queues = 0;
1908 data->nb_tx_queues = 0;
1910 dev->dev_ops = &ops;
1911 dev->rx_pkt_burst = pmd_rx_burst;
1912 dev->tx_pkt_burst = pmd_tx_burst;
1914 pmd->intr_handle.type = RTE_INTR_HANDLE_EXT;
1915 pmd->intr_handle.fd = -1;
1916 dev->intr_handle = &pmd->intr_handle;
1918 /* Presetup the fds to -1 as being not valid */
1919 for (i = 0; i < RTE_PMD_TAP_MAX_QUEUES; i++) {
1920 process_private->rxq_fds[i] = -1;
1921 process_private->txq_fds[i] = -1;
1924 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1925 if (rte_is_zero_ether_addr(mac_addr))
1926 rte_eth_random_addr((uint8_t *)&pmd->eth_addr);
1928 rte_memcpy(&pmd->eth_addr, mac_addr, sizeof(*mac_addr));
1932 * Allocate a TUN device keep-alive file descriptor that will only be
1933 * closed when the TUN device itself is closed or removed.
1934 * This keep-alive file descriptor will guarantee that the TUN device
1935 * exists even when all of its queues are closed
1937 pmd->ka_fd = tun_alloc(pmd, 1);
1938 if (pmd->ka_fd == -1) {
1939 TAP_LOG(ERR, "Unable to create %s interface", tuntap_name);
1942 TAP_LOG(DEBUG, "allocated %s", pmd->name);
1944 ifr.ifr_mtu = dev->data->mtu;
1945 if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
1948 if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
1949 memset(&ifr, 0, sizeof(struct ifreq));
1950 ifr.ifr_hwaddr.sa_family = AF_LOCAL;
1951 rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
1952 RTE_ETHER_ADDR_LEN);
1953 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0)
1958 * Set up everything related to rte_flow:
1960 * - tap / remote if_index
1961 * - mandatory QDISCs
1962 * - rte_flow actual/implicit lists
1965 pmd->nlsk_fd = tap_nl_init(0);
1966 if (pmd->nlsk_fd == -1) {
1967 TAP_LOG(WARNING, "%s: failed to create netlink socket.",
1969 goto disable_rte_flow;
1971 pmd->if_index = if_nametoindex(pmd->name);
1972 if (!pmd->if_index) {
1973 TAP_LOG(ERR, "%s: failed to get if_index.", pmd->name);
1974 goto disable_rte_flow;
1976 if (qdisc_create_multiq(pmd->nlsk_fd, pmd->if_index) < 0) {
1977 TAP_LOG(ERR, "%s: failed to create multiq qdisc.",
1979 goto disable_rte_flow;
1981 if (qdisc_create_ingress(pmd->nlsk_fd, pmd->if_index) < 0) {
1982 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
1984 goto disable_rte_flow;
1986 LIST_INIT(&pmd->flows);
1988 if (strlen(remote_iface)) {
1989 pmd->remote_if_index = if_nametoindex(remote_iface);
1990 if (!pmd->remote_if_index) {
1991 TAP_LOG(ERR, "%s: failed to get %s if_index.",
1992 pmd->name, remote_iface);
1995 strlcpy(pmd->remote_iface, remote_iface, RTE_ETH_NAME_MAX_LEN);
1997 /* Save state of remote device */
1998 tap_ioctl(pmd, SIOCGIFFLAGS, &pmd->remote_initial_flags, 0, REMOTE_ONLY);
2000 /* Replicate remote MAC address */
2001 if (tap_ioctl(pmd, SIOCGIFHWADDR, &ifr, 0, REMOTE_ONLY) < 0) {
2002 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
2003 pmd->name, pmd->remote_iface);
2006 rte_memcpy(&pmd->eth_addr, ifr.ifr_hwaddr.sa_data,
2007 RTE_ETHER_ADDR_LEN);
2008 /* The desired MAC is already in ifreq after SIOCGIFHWADDR. */
2009 if (tap_ioctl(pmd, SIOCSIFHWADDR, &ifr, 0, LOCAL_ONLY) < 0) {
2010 TAP_LOG(ERR, "%s: failed to get %s MAC address.",
2011 pmd->name, remote_iface);
2016 * Flush usually returns negative value because it tries to
2017 * delete every QDISC (and on a running device, one QDISC at
2018 * least is needed). Ignore negative return value.
2020 qdisc_flush(pmd->nlsk_fd, pmd->remote_if_index);
2021 if (qdisc_create_ingress(pmd->nlsk_fd,
2022 pmd->remote_if_index) < 0) {
2023 TAP_LOG(ERR, "%s: failed to create ingress qdisc.",
2027 LIST_INIT(&pmd->implicit_flows);
2028 if (tap_flow_implicit_create(pmd, TAP_REMOTE_TX) < 0 ||
2029 tap_flow_implicit_create(pmd, TAP_REMOTE_LOCAL_MAC) < 0 ||
2030 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCAST) < 0 ||
2031 tap_flow_implicit_create(pmd, TAP_REMOTE_BROADCASTV6) < 0) {
2033 "%s: failed to create implicit rules.",
2039 rte_eth_dev_probing_finish(dev);
2043 TAP_LOG(ERR, " Disabling rte flow support: %s(%d)",
2044 strerror(errno), errno);
2045 if (strlen(remote_iface)) {
2046 TAP_LOG(ERR, "Remote feature requires flow support.");
2049 rte_eth_dev_probing_finish(dev);
2053 TAP_LOG(ERR, " Can't set up remote feature: %s(%d)",
2054 strerror(errno), errno);
2055 tap_flow_implicit_flush(pmd, NULL);
2058 if (pmd->nlsk_fd != -1)
2059 close(pmd->nlsk_fd);
2060 if (pmd->ka_fd != -1)
2062 if (pmd->ioctl_sock != -1)
2063 close(pmd->ioctl_sock);
2064 /* mac_addrs must not be freed alone because part of dev_private */
2065 dev->data->mac_addrs = NULL;
2066 rte_eth_dev_release_port(dev);
2069 TAP_LOG(ERR, "%s Unable to initialize %s",
2070 tuntap_name, rte_vdev_device_name(vdev));
2075 /* make sure name is a possible Linux network device name */
2077 is_valid_iface(const char *name)
2082 if (strnlen(name, IFNAMSIZ) == IFNAMSIZ)
2086 if (*name == '/' || *name == ':' || isspace(*name))
2094 set_interface_name(const char *key __rte_unused,
2098 char *name = (char *)extra_args;
2101 if (!is_valid_iface(value)) {
2102 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2106 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2108 /* use tap%d which causes kernel to choose next available */
2109 strlcpy(name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2115 set_remote_iface(const char *key __rte_unused,
2119 char *name = (char *)extra_args;
2122 if (!is_valid_iface(value)) {
2123 TAP_LOG(ERR, "TAP invalid remote interface name (%s)",
2127 strlcpy(name, value, RTE_ETH_NAME_MAX_LEN);
2133 static int parse_user_mac(struct rte_ether_addr *user_mac,
2136 unsigned int index = 0;
2137 char mac_temp[strlen(ETH_TAP_USR_MAC_FMT) + 1], *mac_byte = NULL;
2139 if (user_mac == NULL || value == NULL)
2142 strlcpy(mac_temp, value, sizeof(mac_temp));
2143 mac_byte = strtok(mac_temp, ":");
2145 while ((mac_byte != NULL) &&
2146 (strlen(mac_byte) <= 2) &&
2147 (strlen(mac_byte) == strspn(mac_byte,
2148 ETH_TAP_CMP_MAC_FMT))) {
2149 user_mac->addr_bytes[index++] = strtoul(mac_byte, NULL, 16);
2150 mac_byte = strtok(NULL, ":");
2157 set_mac_type(const char *key __rte_unused,
2161 struct rte_ether_addr *user_mac = extra_args;
2166 if (!strncasecmp(ETH_TAP_MAC_FIXED, value, strlen(ETH_TAP_MAC_FIXED))) {
2167 static int iface_idx;
2169 /* fixed mac = 00:64:74:61:70:<iface_idx> */
2170 memcpy((char *)user_mac->addr_bytes, "\0dtap",
2171 RTE_ETHER_ADDR_LEN);
2172 user_mac->addr_bytes[RTE_ETHER_ADDR_LEN - 1] =
2177 if (parse_user_mac(user_mac, value) != 6)
2180 TAP_LOG(DEBUG, "TAP user MAC param (%s)", value);
2184 TAP_LOG(ERR, "TAP user MAC (%s) is not in format (%s|%s)",
2185 value, ETH_TAP_MAC_FIXED, ETH_TAP_USR_MAC_FMT);
2190 * Open a TUN interface device. TUN PMD
2191 * 1) sets tap_type as false
2192 * 2) intakes iface as argument.
2193 * 3) as interface is virtual set speed to 10G
2196 rte_pmd_tun_probe(struct rte_vdev_device *dev)
2198 const char *name, *params;
2200 struct rte_kvargs *kvlist = NULL;
2201 char tun_name[RTE_ETH_NAME_MAX_LEN];
2202 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2203 struct rte_eth_dev *eth_dev;
2205 name = rte_vdev_device_name(dev);
2206 params = rte_vdev_device_args(dev);
2207 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2209 if (rte_eal_process_type() == RTE_PROC_SECONDARY &&
2210 strlen(params) == 0) {
2211 eth_dev = rte_eth_dev_attach_secondary(name);
2213 TAP_LOG(ERR, "Failed to probe %s", name);
2216 eth_dev->dev_ops = &ops;
2217 eth_dev->device = &dev->device;
2218 rte_eth_dev_probing_finish(eth_dev);
2222 /* use tun%d which causes kernel to choose next available */
2223 strlcpy(tun_name, DEFAULT_TUN_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2225 if (params && (params[0] != '\0')) {
2226 TAP_LOG(DEBUG, "parameters (%s)", params);
2228 kvlist = rte_kvargs_parse(params, valid_arguments);
2230 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2231 ret = rte_kvargs_process(kvlist,
2233 &set_interface_name,
2241 pmd_link.link_speed = ETH_SPEED_NUM_10G;
2243 TAP_LOG(DEBUG, "Initializing pmd_tun for %s", name);
2245 ret = eth_dev_tap_create(dev, tun_name, remote_iface, 0,
2246 ETH_TUNTAP_TYPE_TUN);
2250 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2253 rte_kvargs_free(kvlist);
2258 /* Request queue file descriptors from secondary to primary. */
2260 tap_mp_attach_queues(const char *port_name, struct rte_eth_dev *dev)
2263 struct timespec timeout = {.tv_sec = 1, .tv_nsec = 0};
2264 struct rte_mp_msg request, *reply;
2265 struct rte_mp_reply replies;
2266 struct ipc_queues *request_param = (struct ipc_queues *)request.param;
2267 struct ipc_queues *reply_param;
2268 struct pmd_process_private *process_private = dev->process_private;
2269 int queue, fd_iterator;
2271 /* Prepare the request */
2272 memset(&request, 0, sizeof(request));
2273 strlcpy(request.name, TAP_MP_KEY, sizeof(request.name));
2274 strlcpy(request_param->port_name, port_name,
2275 sizeof(request_param->port_name));
2276 request.len_param = sizeof(*request_param);
2277 /* Send request and receive reply */
2278 ret = rte_mp_request_sync(&request, &replies, &timeout);
2279 if (ret < 0 || replies.nb_received != 1) {
2280 TAP_LOG(ERR, "Failed to request queues from primary: %d",
2284 reply = &replies.msgs[0];
2285 reply_param = (struct ipc_queues *)reply->param;
2286 TAP_LOG(DEBUG, "Received IPC reply for %s", reply_param->port_name);
2288 /* Attach the queues from received file descriptors */
2289 if (reply_param->rxq_count + reply_param->txq_count != reply->num_fds) {
2290 TAP_LOG(ERR, "Unexpected number of fds received");
2294 dev->data->nb_rx_queues = reply_param->rxq_count;
2295 dev->data->nb_tx_queues = reply_param->txq_count;
2297 for (queue = 0; queue < reply_param->rxq_count; queue++)
2298 process_private->rxq_fds[queue] = reply->fds[fd_iterator++];
2299 for (queue = 0; queue < reply_param->txq_count; queue++)
2300 process_private->txq_fds[queue] = reply->fds[fd_iterator++];
2305 /* Send the queue file descriptors from the primary process to secondary. */
2307 tap_mp_sync_queues(const struct rte_mp_msg *request, const void *peer)
2309 struct rte_eth_dev *dev;
2310 struct pmd_process_private *process_private;
2311 struct rte_mp_msg reply;
2312 const struct ipc_queues *request_param =
2313 (const struct ipc_queues *)request->param;
2314 struct ipc_queues *reply_param =
2315 (struct ipc_queues *)reply.param;
2320 /* Get requested port */
2321 TAP_LOG(DEBUG, "Received IPC request for %s", request_param->port_name);
2322 ret = rte_eth_dev_get_port_by_name(request_param->port_name, &port_id);
2324 TAP_LOG(ERR, "Failed to get port id for %s",
2325 request_param->port_name);
2328 dev = &rte_eth_devices[port_id];
2329 process_private = dev->process_private;
2331 /* Fill file descriptors for all queues */
2333 reply_param->rxq_count = 0;
2334 if (dev->data->nb_rx_queues + dev->data->nb_tx_queues >
2336 TAP_LOG(ERR, "Number of rx/tx queues exceeds max number of fds");
2340 for (queue = 0; queue < dev->data->nb_rx_queues; queue++) {
2341 reply.fds[reply.num_fds++] = process_private->rxq_fds[queue];
2342 reply_param->rxq_count++;
2344 RTE_ASSERT(reply_param->rxq_count == dev->data->nb_rx_queues);
2346 reply_param->txq_count = 0;
2347 for (queue = 0; queue < dev->data->nb_tx_queues; queue++) {
2348 reply.fds[reply.num_fds++] = process_private->txq_fds[queue];
2349 reply_param->txq_count++;
2351 RTE_ASSERT(reply_param->txq_count == dev->data->nb_tx_queues);
2354 strlcpy(reply.name, request->name, sizeof(reply.name));
2355 strlcpy(reply_param->port_name, request_param->port_name,
2356 sizeof(reply_param->port_name));
2357 reply.len_param = sizeof(*reply_param);
2358 if (rte_mp_reply(&reply, peer) < 0) {
2359 TAP_LOG(ERR, "Failed to reply an IPC request to sync queues");
2365 /* Open a TAP interface device.
2368 rte_pmd_tap_probe(struct rte_vdev_device *dev)
2370 const char *name, *params;
2372 struct rte_kvargs *kvlist = NULL;
2374 char tap_name[RTE_ETH_NAME_MAX_LEN];
2375 char remote_iface[RTE_ETH_NAME_MAX_LEN];
2376 struct rte_ether_addr user_mac = { .addr_bytes = {0} };
2377 struct rte_eth_dev *eth_dev;
2378 int tap_devices_count_increased = 0;
2380 name = rte_vdev_device_name(dev);
2381 params = rte_vdev_device_args(dev);
2383 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
2384 eth_dev = rte_eth_dev_attach_secondary(name);
2386 TAP_LOG(ERR, "Failed to probe %s", name);
2389 eth_dev->dev_ops = &ops;
2390 eth_dev->device = &dev->device;
2391 eth_dev->rx_pkt_burst = pmd_rx_burst;
2392 eth_dev->tx_pkt_burst = pmd_tx_burst;
2393 if (!rte_eal_primary_proc_alive(NULL)) {
2394 TAP_LOG(ERR, "Primary process is missing");
2397 eth_dev->process_private = (struct pmd_process_private *)
2398 rte_zmalloc_socket(name,
2399 sizeof(struct pmd_process_private),
2400 RTE_CACHE_LINE_SIZE,
2401 eth_dev->device->numa_node);
2402 if (eth_dev->process_private == NULL) {
2404 "Failed to alloc memory for process private");
2408 ret = tap_mp_attach_queues(name, eth_dev);
2411 rte_eth_dev_probing_finish(eth_dev);
2415 speed = ETH_SPEED_NUM_10G;
2417 /* use tap%d which causes kernel to choose next available */
2418 strlcpy(tap_name, DEFAULT_TAP_NAME "%d", RTE_ETH_NAME_MAX_LEN);
2419 memset(remote_iface, 0, RTE_ETH_NAME_MAX_LEN);
2421 if (params && (params[0] != '\0')) {
2422 TAP_LOG(DEBUG, "parameters (%s)", params);
2424 kvlist = rte_kvargs_parse(params, valid_arguments);
2426 if (rte_kvargs_count(kvlist, ETH_TAP_IFACE_ARG) == 1) {
2427 ret = rte_kvargs_process(kvlist,
2429 &set_interface_name,
2435 if (rte_kvargs_count(kvlist, ETH_TAP_REMOTE_ARG) == 1) {
2436 ret = rte_kvargs_process(kvlist,
2444 if (rte_kvargs_count(kvlist, ETH_TAP_MAC_ARG) == 1) {
2445 ret = rte_kvargs_process(kvlist,
2454 pmd_link.link_speed = speed;
2456 TAP_LOG(DEBUG, "Initializing pmd_tap for %s", name);
2458 /* Register IPC feed callback */
2459 if (!tap_devices_count) {
2460 ret = rte_mp_action_register(TAP_MP_KEY, tap_mp_sync_queues);
2461 if (ret < 0 && rte_errno != ENOTSUP) {
2462 TAP_LOG(ERR, "tap: Failed to register IPC callback: %s",
2463 strerror(rte_errno));
2467 tap_devices_count++;
2468 tap_devices_count_increased = 1;
2469 ret = eth_dev_tap_create(dev, tap_name, remote_iface, &user_mac,
2470 ETH_TUNTAP_TYPE_TAP);
2474 TAP_LOG(ERR, "Failed to create pmd for %s as %s",
2476 if (tap_devices_count_increased == 1) {
2477 if (tap_devices_count == 1)
2478 rte_mp_action_unregister(TAP_MP_KEY);
2479 tap_devices_count--;
2482 rte_kvargs_free(kvlist);
2487 /* detach a TUNTAP device.
2490 rte_pmd_tap_remove(struct rte_vdev_device *dev)
2492 struct rte_eth_dev *eth_dev = NULL;
2493 struct pmd_internals *internals;
2495 /* find the ethdev entry */
2496 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
2500 /* mac_addrs must not be freed alone because part of dev_private */
2501 eth_dev->data->mac_addrs = NULL;
2503 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
2504 return rte_eth_dev_release_port(eth_dev);
2506 tap_dev_close(eth_dev);
2508 internals = eth_dev->data->dev_private;
2509 TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
2510 tuntap_types[internals->type], rte_socket_id());
2512 close(internals->ioctl_sock);
2513 rte_free(eth_dev->process_private);
2514 if (tap_devices_count == 1)
2515 rte_mp_action_unregister(TAP_MP_KEY);
2516 tap_devices_count--;
2517 rte_eth_dev_release_port(eth_dev);
2522 static struct rte_vdev_driver pmd_tun_drv = {
2523 .probe = rte_pmd_tun_probe,
2524 .remove = rte_pmd_tap_remove,
2527 static struct rte_vdev_driver pmd_tap_drv = {
2528 .probe = rte_pmd_tap_probe,
2529 .remove = rte_pmd_tap_remove,
2532 RTE_PMD_REGISTER_VDEV(net_tap, pmd_tap_drv);
2533 RTE_PMD_REGISTER_VDEV(net_tun, pmd_tun_drv);
2534 RTE_PMD_REGISTER_ALIAS(net_tap, eth_tap);
2535 RTE_PMD_REGISTER_PARAM_STRING(net_tun,
2536 ETH_TAP_IFACE_ARG "=<string> ");
2537 RTE_PMD_REGISTER_PARAM_STRING(net_tap,
2538 ETH_TAP_IFACE_ARG "=<string> "
2539 ETH_TAP_MAC_ARG "=" ETH_TAP_MAC_ARG_FMT " "
2540 ETH_TAP_REMOTE_ARG "=<string>");
2541 RTE_LOG_REGISTER(tap_logtype, pmd.net.tap, NOTICE);