2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
19 #include <sys/types.h>
23 #include <linux/if_tun.h>
24 #include <sys/ioctl.h>
25 #include <linux/virtio_net.h>
26 #include <linux/vhost.h>
27 #include <sys/eventfd.h>
28 #include <net/if_arp.h>
32 #include <linux/netlink.h>
33 #include <linux/rtnetlink.h>
35 #include <vlib/vlib.h>
36 #include <vlib/physmem.h>
37 #include <vlib/unix/unix.h>
38 #include <vnet/ethernet/ethernet.h>
39 #include <vnet/ip/ip4_packet.h>
40 #include <vnet/ip/ip6_packet.h>
41 #include <vnet/devices/netlink.h>
42 #include <vnet/devices/virtio/virtio.h>
43 #include <vnet/devices/tap/tap.h>
47 #define tap_log_err(dev, f, ...) \
48 vlib_log (VLIB_LOG_LEVEL_ERR, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
49 #define tap_log_dbg(dev, f, ...) \
50 vlib_log (VLIB_LOG_LEVEL_DEBUG, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
52 #define _IOCTL(fd,a,...) \
53 if (ioctl (fd, a, __VA_ARGS__) < 0) \
55 err = clib_error_return_unix (0, "ioctl(" #a ")"); \
56 tap_log_err (vif, "%U", format_clib_error, err); \
61 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
65 //TODO On MTU change call vnet_netlink_set_if_mtu
70 open_netns_fd (char *netns)
75 if (strncmp (netns, "pid:", 4) == 0)
76 s = format (0, "/proc/%u/ns/net%c", atoi (netns + 4), 0);
77 else if (netns[0] == '/')
78 s = format (0, "%s%c", netns, 0);
80 s = format (0, "/var/run/netns/%s%c", netns, 0);
82 fd = open ((char *) s, O_RDONLY);
87 #define TAP_MAX_INSTANCE 1024
90 tap_free (vlib_main_t * vm, virtio_if_t * vif)
92 virtio_main_t *mm = &virtio_main;
93 tap_main_t *tm = &tap_main;
97 vec_foreach_index (i, vif->vhost_fds) if (vif->vhost_fds[i] != -1)
98 close (vif->vhost_fds[i]);
99 vec_foreach_index (i, vif->rxq_vrings)
100 virtio_vring_free_rx (vm, vif, RX_QUEUE (i));
101 vec_foreach_index (i, vif->txq_vrings)
102 virtio_vring_free_tx (vm, vif, TX_QUEUE (i));
105 if (vif->tap_fd != -1)
108 vec_free (vif->vhost_fds);
109 vec_free (vif->rxq_vrings);
110 vec_free (vif->txq_vrings);
111 vec_free (vif->host_if_name);
112 vec_free (vif->net_ns);
113 vec_free (vif->host_bridge);
114 clib_error_free (vif->error);
116 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0);
117 clib_memset (vif, 0, sizeof (*vif));
118 pool_put (mm->interfaces, vif);
122 tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
124 vlib_thread_main_t *thm = vlib_get_thread_main ();
125 vlib_physmem_main_t *vpm = &vm->physmem_main;
126 vnet_main_t *vnm = vnet_get_main ();
127 virtio_main_t *vim = &virtio_main;
128 tap_main_t *tm = &tap_main;
129 vnet_sw_interface_t *sw;
130 vnet_hw_interface_t *hw;
132 int old_netns_fd = -1;
133 struct ifreq ifr = {.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR };
135 struct vhost_memory *vhost_mem = 0;
136 virtio_if_t *vif = 0;
137 clib_error_t *err = 0;
138 unsigned int tap_features;
139 int tfd, vfd, nfd = -1;
140 char *host_if_name = 0;
141 unsigned int offload = 0;
146 if (clib_bitmap_get (tm->tap_ids, args->id))
148 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
149 args->error = clib_error_return (0, "interface already exists");
155 args->id = clib_bitmap_first_clear (tm->tap_ids);
158 if (args->id > TAP_MAX_INSTANCE)
160 args->rv = VNET_API_ERROR_UNSPECIFIED;
161 args->error = clib_error_return (0, "cannot find free interface id");
165 pool_get_zero (vim->interfaces, vif);
166 vif->type = VIRTIO_IF_TYPE_TAP;
167 vif->dev_instance = vif - vim->interfaces;
169 vif->num_txqs = thm->n_vlib_mains;
170 vif->num_rxqs = args->num_rx_queues;
171 num_q_pairs = clib_max (vif->num_rxqs, vif->num_txqs);
173 if (ethernet_mac_address_is_zero (args->host_mac_addr))
174 ethernet_mac_address_generate (args->host_mac_addr);
175 clib_memcpy (vif->host_mac_addr, args->host_mac_addr, 6);
177 if ((vif->tap_fd = tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
179 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
180 args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
183 tap_log_dbg (vif, "open tap fd %d", tfd);
185 _IOCTL (tfd, TUNGETFEATURES, &tap_features);
186 tap_log_dbg (vif, "TUNGETFEATURES: features 0x%lx", tap_features);
187 if ((tap_features & IFF_VNET_HDR) == 0)
189 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
190 args->error = clib_error_return (0, "vhost-net backend not available");
194 if ((tap_features & IFF_MULTI_QUEUE) == 0)
196 if (args->num_rx_queues > 1)
198 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
199 args->error = clib_error_return (0, "multiqueue not supported");
202 vif->num_rxqs = vif->num_txqs = num_q_pairs = 1;
205 ifr.ifr_flags |= IFF_MULTI_QUEUE;
207 hdrsz = sizeof (struct virtio_net_hdr_v1);
208 if (args->tap_flags & TAP_FLAG_GSO)
210 offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
211 vif->gso_enabled = 1;
214 _IOCTL (tfd, TUNSETIFF, (void *) &ifr);
215 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd,
216 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
218 vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
219 tap_log_dbg (vif, "ifindex %d", vif->ifindex);
221 if (!args->host_if_name)
222 host_if_name = ifr.ifr_ifrn.ifrn_name;
224 host_if_name = (char *) args->host_if_name;
226 fcntl (tfd, F_SETFL, O_NONBLOCK);
228 tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u", tfd, hdrsz);
229 _IOCTL (tfd, TUNSETVNETHDRSZ, &hdrsz);
232 tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", tfd, i);
233 _IOCTL (tfd, TUNSETSNDBUF, &i);
235 tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", tfd, offload);
236 _IOCTL (tfd, TUNSETOFFLOAD, offload);
238 clib_memset (&ifr, 0, sizeof (ifr));
239 ifr.ifr_addr.sa_family = ARPHRD_ETHER;
240 clib_memcpy (ifr.ifr_hwaddr.sa_data, vif->host_mac_addr, 6);
241 tap_log_dbg (vif, "SIOCSIFHWADDR: fd %d hwaddr %U", tfd,
242 format_hex_bytes, ifr.ifr_hwaddr.sa_data, 6);
243 _IOCTL (tfd, SIOCSIFHWADDR, (void *) &ifr);
245 /* open vhost-net fd for each queue pair and set ownership */
246 for (i = 0; i < num_q_pairs; i++)
248 if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
250 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
251 args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
254 vec_add1 (vif->vhost_fds, vfd);
255 virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i);
256 _IOCTL (vfd, VHOST_SET_OWNER, 0);
257 virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd);
260 _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features);
261 virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx",
262 vif->remote_features);
264 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
266 args->rv = VNET_API_ERROR_UNSUPPORTED;
267 args->error = clib_error_return (0, "vhost-net backend doesn't support "
268 "VIRTIO_NET_F_MRG_RXBUF feature");
272 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
275 args->rv = VNET_API_ERROR_UNSUPPORTED;
276 args->error = clib_error_return (0, "vhost-net backend doesn't support "
277 "VIRTIO_RING_F_INDIRECT_DESC feature");
281 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1)) == 0)
283 args->rv = VNET_API_ERROR_UNSUPPORTED;
284 args->error = clib_error_return (0, "vhost-net backend doesn't support "
285 "VIRTIO_F_VERSION_1 features");
289 vif->features |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
290 vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
291 vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
293 virtio_set_net_hdr_size (vif);
295 /* if namespace is specified, all further netlink messages should be executed
296 after we change our net namespace */
297 if (args->host_namespace)
299 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
300 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
302 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
303 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
304 args->host_namespace);
307 args->error = vnet_netlink_set_link_netns (vif->ifindex, nfd,
311 args->rv = VNET_API_ERROR_NETLINK_ERROR;
314 if (setns (nfd, CLONE_NEWNET) == -1)
316 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
317 args->error = clib_error_return_unix (0, "setns '%s'",
318 args->host_namespace);
321 if ((vif->ifindex = if_nametoindex (host_if_name)) == 0)
323 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
324 args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
333 args->error = vnet_netlink_set_link_name (vif->ifindex,
337 args->rv = VNET_API_ERROR_NETLINK_ERROR;
343 if (args->host_bridge)
345 args->error = vnet_netlink_set_link_master (vif->ifindex,
346 (char *) args->host_bridge);
349 args->rv = VNET_API_ERROR_NETLINK_ERROR;
354 if (args->host_ip4_prefix_len)
356 args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
357 &args->host_ip4_addr,
358 args->host_ip4_prefix_len);
361 args->rv = VNET_API_ERROR_NETLINK_ERROR;
366 if (args->host_ip6_prefix_len)
368 args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
369 &args->host_ip6_addr,
370 args->host_ip6_prefix_len);
373 args->rv = VNET_API_ERROR_NETLINK_ERROR;
378 args->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
381 args->rv = VNET_API_ERROR_NETLINK_ERROR;
385 if (args->host_ip4_gw_set)
387 args->error = vnet_netlink_add_ip4_route (0, 0, &args->host_ip4_gw);
390 args->rv = VNET_API_ERROR_NETLINK_ERROR;
395 if (args->host_ip6_gw_set)
397 args->error = vnet_netlink_add_ip6_route (0, 0, &args->host_ip6_gw);
400 args->rv = VNET_API_ERROR_NETLINK_ERROR;
405 /* switch back to old net namespace */
406 if (args->host_namespace)
408 if (setns (old_netns_fd, CLONE_NEWNET) == -1)
410 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
411 args->error = clib_error_return_unix (0, "setns '%s'",
412 args->host_namespace);
417 if (args->host_mtu_set)
420 vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size);
423 args->rv = VNET_API_ERROR_NETLINK_ERROR;
427 else if (tm->host_mtu_size != 0)
430 vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size);
433 args->rv = VNET_API_ERROR_NETLINK_ERROR;
436 args->host_mtu_set = 1;
437 args->host_mtu_size = tm->host_mtu_size;
440 for (i = 0; i < num_q_pairs; i++)
442 if (i < vif->num_rxqs && (args->error =
443 virtio_vring_init (vm, vif, RX_QUEUE (i),
446 args->rv = VNET_API_ERROR_INIT_FAILED;
450 if (i < vif->num_txqs && (args->error =
451 virtio_vring_init (vm, vif, TX_QUEUE (i),
454 args->rv = VNET_API_ERROR_INIT_FAILED;
459 /* setup features and memtable */
460 i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region);
461 vhost_mem = clib_mem_alloc (i);
462 clib_memset (vhost_mem, 0, i);
463 vhost_mem->nregions = 1;
464 vhost_mem->regions[0].memory_size = vpm->max_size;
465 vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
466 vhost_mem->regions[0].userspace_addr =
467 vhost_mem->regions[0].guest_phys_addr;
469 for (i = 0; i < vhost_mem->nregions; i++)
470 virtio_log_debug (vif, "memtable region %u memory_size 0x%lx "
471 "guest_phys_addr 0x%lx userspace_addr 0x%lx", i,
472 vhost_mem->regions[0].memory_size,
473 vhost_mem->regions[0].guest_phys_addr,
474 vhost_mem->regions[0].userspace_addr);
477 for (i = 0; i < num_q_pairs; i++)
479 int fd = vif->vhost_fds[i];
480 _IOCTL (fd, VHOST_SET_FEATURES, &vif->features);
481 virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx",
483 _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem);
484 virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd);
487 /* finish initializing queue pair */
488 for (i = 0; i < num_q_pairs * 2; i++)
490 struct vhost_vring_addr addr = { 0 };
491 struct vhost_vring_state state = { 0 };
492 struct vhost_vring_file file = { 0 };
493 virtio_vring_t *vring;
495 int fd = vif->vhost_fds[qp];
499 if (qp >= vif->num_txqs)
501 vring = vec_elt_at_index (vif->txq_vrings, qp);
505 if (qp >= vif->num_rxqs)
507 vring = vec_elt_at_index (vif->rxq_vrings, qp);
510 addr.index = state.index = file.index = vring->queue_id & 1;
511 state.num = vring->size;
512 virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
513 state.index, state.num);
514 _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
517 addr.desc_user_addr = pointer_to_uword (vring->desc);
518 addr.avail_user_addr = pointer_to_uword (vring->avail);
519 addr.used_user_addr = pointer_to_uword (vring->used);
521 virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x "
522 "desc_user_addr 0x%lx avail_user_addr 0x%lx "
523 "used_user_addr 0x%lx", fd, addr.index,
524 addr.flags, addr.desc_user_addr, addr.avail_user_addr,
525 addr.used_user_addr);
526 _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr);
528 file.fd = vring->call_fd;
529 virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d",
530 fd, file.index, file.fd);
531 _IOCTL (fd, VHOST_SET_VRING_CALL, &file);
533 file.fd = vring->kick_fd;
534 virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d",
535 fd, file.index, file.fd);
536 _IOCTL (fd, VHOST_SET_VRING_KICK, &file);
539 virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d",
540 fd, file.index, file.fd);
541 _IOCTL (fd, VHOST_NET_SET_BACKEND, &file);
544 if (!args->mac_addr_set)
545 ethernet_mac_address_generate (args->mac_addr);
547 clib_memcpy (vif->mac_addr, args->mac_addr, 6);
549 vif->host_if_name = format (0, "%s%c", host_if_name, 0);
550 vif->net_ns = format (0, "%s%c", args->host_namespace, 0);
551 vif->host_bridge = format (0, "%s%c", args->host_bridge, 0);
552 vif->host_mtu_size = args->host_mtu_size;
553 vif->host_ip4_prefix_len = args->host_ip4_prefix_len;
554 vif->host_ip6_prefix_len = args->host_ip6_prefix_len;
555 if (args->host_ip4_prefix_len)
556 clib_memcpy (&vif->host_ip4_addr, &args->host_ip4_addr, 4);
557 if (args->host_ip6_prefix_len)
558 clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16);
560 args->error = ethernet_register_interface (vnm, virtio_device_class.index,
564 virtio_eth_flag_change);
567 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
571 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1);
572 sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
573 vif->sw_if_index = sw->sw_if_index;
574 args->sw_if_index = vif->sw_if_index;
576 hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
577 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
578 if (args->tap_flags & TAP_FLAG_GSO)
580 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
581 vnm->interface_main.gso_interface_count++;
583 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
584 virtio_input_node.index);
586 for (i = 0; i < vif->num_rxqs; i++)
588 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0);
589 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i,
590 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
593 vif->per_interface_next_index = ~0;
594 virtio_vring_set_numa_node (vm, vif, RX_QUEUE (0));
595 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
596 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
597 VNET_HW_INTERFACE_FLAG_LINK_UP);
598 vif->cxq_vring = NULL;
605 ASSERT (args->error == 0);
607 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
613 clib_mem_free (vhost_mem);
614 if (old_netns_fd != -1)
615 close (old_netns_fd);
621 tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
623 vnet_main_t *vnm = vnet_get_main ();
624 virtio_main_t *mm = &virtio_main;
627 vnet_hw_interface_t *hw;
629 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
630 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
631 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
633 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
635 if (vif->type != VIRTIO_IF_TYPE_TAP)
636 return VNET_API_ERROR_INVALID_INTERFACE;
638 /* decrement if this was a GSO interface */
639 if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
640 vnm->interface_main.gso_interface_count--;
642 /* bring down the interface */
643 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
644 vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0);
645 for (i = 0; i < vif->num_rxqs; i++)
646 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i);
648 ethernet_delete_interface (vnm, vif->hw_if_index);
649 vif->hw_if_index = ~0;
657 tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable)
659 vnet_main_t *vnm = vnet_get_main ();
660 virtio_main_t *mm = &virtio_main;
662 vnet_hw_interface_t *hw;
663 clib_error_t *err = 0;
665 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
667 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
668 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
670 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
672 const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
673 const unsigned int gso_off = 0;
674 unsigned int offload = enable_disable ? gso_on : gso_off;
675 _IOCTL (vif->tap_fd, TUNSETOFFLOAD, offload);
676 vif->gso_enabled = enable_disable ? 1 : 0;
679 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0)
681 vnm->interface_main.gso_interface_count++;
682 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
687 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
689 vnm->interface_main.gso_interface_count--;
690 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
697 clib_warning ("Error %s gso on sw_if_index %d",
698 enable_disable ? "enabling" : "disabling", sw_if_index);
699 return VNET_API_ERROR_SYSCALL_ERROR_3;
705 tap_dump_ifs (tap_interface_details_t ** out_tapids)
707 vnet_main_t *vnm = vnet_get_main ();
708 virtio_main_t *mm = &virtio_main;
710 virtio_vring_t *vring;
711 vnet_hw_interface_t *hi;
712 tap_interface_details_t *r_tapids = NULL;
713 tap_interface_details_t *tapid = NULL;
716 pool_foreach (vif, mm->interfaces,
717 if (vif->type != VIRTIO_IF_TYPE_TAP)
719 vec_add2(r_tapids, tapid, 1);
720 clib_memset (tapid, 0, sizeof (*tapid));
722 tapid->sw_if_index = vif->sw_if_index;
723 hi = vnet_get_hw_interface (vnm, vif->hw_if_index);
724 clib_memcpy(tapid->dev_name, hi->name,
725 MIN (ARRAY_LEN (tapid->dev_name) - 1,
726 strlen ((const char *) hi->name)));
727 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
728 tapid->rx_ring_sz = vring->size;
729 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
730 tapid->tx_ring_sz = vring->size;
731 clib_memcpy(tapid->host_mac_addr, vif->host_mac_addr, 6);
732 if (vif->host_if_name)
734 clib_memcpy(tapid->host_if_name, vif->host_if_name,
735 MIN (ARRAY_LEN (tapid->host_if_name) - 1,
736 strlen ((const char *) vif->host_if_name)));
740 clib_memcpy(tapid->host_namespace, vif->net_ns,
741 MIN (ARRAY_LEN (tapid->host_namespace) - 1,
742 strlen ((const char *) vif->net_ns)));
744 if (vif->host_bridge)
746 clib_memcpy(tapid->host_bridge, vif->host_bridge,
747 MIN (ARRAY_LEN (tapid->host_bridge) - 1,
748 strlen ((const char *) vif->host_bridge)));
750 if (vif->host_ip4_prefix_len)
751 clib_memcpy(tapid->host_ip4_addr, &vif->host_ip4_addr, 4);
752 tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len;
753 if (vif->host_ip6_prefix_len)
754 clib_memcpy(tapid->host_ip6_addr, &vif->host_ip6_addr, 16);
755 tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len;
756 tapid->host_mtu_size = vif->host_mtu_size;
760 *out_tapids = r_tapids;
765 static clib_error_t *
766 tap_mtu_config (vlib_main_t * vm, unformat_input_t * input)
768 tap_main_t *tm = &tap_main;
770 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
772 if (unformat (input, "host-mtu %d", &tm->host_mtu_size))
775 return clib_error_return (0, "unknown input `%U'",
776 format_unformat_error, input);
782 /* tap { host-mtu <size> } configuration. */
783 VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap");
785 static clib_error_t *
786 tap_init (vlib_main_t * vm)
788 tap_main_t *tm = &tap_main;
789 clib_error_t *error = 0;
791 tm->log_default = vlib_log_register_class ("tap", 0);
792 vlib_log_debug (tm->log_default, "initialized");
794 tm->host_mtu_size = 0;
799 VLIB_INIT_FUNCTION (tap_init);
802 * fd.io coding-style-patch-verification: ON
805 * eval: (c-set-style "gnu")