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.bytes))
174 ethernet_mac_address_generate (args->host_mac_addr.bytes);
175 clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 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;
213 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
215 offload = TUN_F_CSUM;
216 vif->csum_offload_enabled = 1;
219 _IOCTL (tfd, TUNSETIFF, (void *) &ifr);
220 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd,
221 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
223 vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
224 tap_log_dbg (vif, "ifindex %d", vif->ifindex);
226 if (!args->host_if_name)
227 host_if_name = ifr.ifr_ifrn.ifrn_name;
229 host_if_name = (char *) args->host_if_name;
231 if (fcntl (tfd, F_SETFL, O_NONBLOCK) < 0)
233 err = clib_error_return_unix (0, "fcntl(tfd, F_SETFL, O_NONBLOCK)");
234 tap_log_err (vif, "set nonblocking: %U", format_clib_error, err);
238 tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u", tfd, hdrsz);
239 _IOCTL (tfd, TUNSETVNETHDRSZ, &hdrsz);
242 tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", tfd, i);
243 _IOCTL (tfd, TUNSETSNDBUF, &i);
245 tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", tfd, offload);
246 _IOCTL (tfd, TUNSETOFFLOAD, offload);
248 clib_memset (&ifr, 0, sizeof (ifr));
249 ifr.ifr_addr.sa_family = ARPHRD_ETHER;
250 clib_memcpy (ifr.ifr_hwaddr.sa_data, vif->host_mac_addr, 6);
251 tap_log_dbg (vif, "SIOCSIFHWADDR: fd %d hwaddr %U", tfd,
252 format_hex_bytes, ifr.ifr_hwaddr.sa_data, 6);
253 _IOCTL (tfd, SIOCSIFHWADDR, (void *) &ifr);
255 /* open vhost-net fd for each queue pair and set ownership */
256 for (i = 0; i < num_q_pairs; i++)
258 if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
260 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
261 args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
264 vec_add1 (vif->vhost_fds, vfd);
265 virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i);
266 _IOCTL (vfd, VHOST_SET_OWNER, 0);
267 virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd);
270 _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features);
271 virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx",
272 vif->remote_features);
274 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
276 args->rv = VNET_API_ERROR_UNSUPPORTED;
277 args->error = clib_error_return (0, "vhost-net backend doesn't support "
278 "VIRTIO_NET_F_MRG_RXBUF feature");
282 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
285 args->rv = VNET_API_ERROR_UNSUPPORTED;
286 args->error = clib_error_return (0, "vhost-net backend doesn't support "
287 "VIRTIO_RING_F_INDIRECT_DESC feature");
291 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1)) == 0)
293 args->rv = VNET_API_ERROR_UNSUPPORTED;
294 args->error = clib_error_return (0, "vhost-net backend doesn't support "
295 "VIRTIO_F_VERSION_1 features");
299 vif->features |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
300 vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
301 vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
303 virtio_set_net_hdr_size (vif);
305 /* if namespace is specified, all further netlink messages should be executed
306 after we change our net namespace */
307 if (args->host_namespace)
309 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
310 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
312 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
313 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
314 args->host_namespace);
317 args->error = vnet_netlink_set_link_netns (vif->ifindex, nfd,
321 args->rv = VNET_API_ERROR_NETLINK_ERROR;
324 if (setns (nfd, CLONE_NEWNET) == -1)
326 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
327 args->error = clib_error_return_unix (0, "setns '%s'",
328 args->host_namespace);
331 if ((vif->ifindex = if_nametoindex (host_if_name)) == 0)
333 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
334 args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
343 args->error = vnet_netlink_set_link_name (vif->ifindex,
347 args->rv = VNET_API_ERROR_NETLINK_ERROR;
353 if (!ethernet_mac_address_is_zero (args->host_mac_addr.bytes))
355 args->error = vnet_netlink_set_link_addr (vif->ifindex,
356 args->host_mac_addr.bytes);
359 args->rv = VNET_API_ERROR_NETLINK_ERROR;
364 if (args->host_bridge)
366 args->error = vnet_netlink_set_link_master (vif->ifindex,
367 (char *) args->host_bridge);
370 args->rv = VNET_API_ERROR_NETLINK_ERROR;
375 if (args->host_ip4_prefix_len)
377 args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
378 &args->host_ip4_addr,
379 args->host_ip4_prefix_len);
382 args->rv = VNET_API_ERROR_NETLINK_ERROR;
387 if (args->host_ip6_prefix_len)
389 args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
390 &args->host_ip6_addr,
391 args->host_ip6_prefix_len);
394 args->rv = VNET_API_ERROR_NETLINK_ERROR;
399 args->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
402 args->rv = VNET_API_ERROR_NETLINK_ERROR;
406 if (args->host_ip4_gw_set)
408 args->error = vnet_netlink_add_ip4_route (0, 0, &args->host_ip4_gw);
411 args->rv = VNET_API_ERROR_NETLINK_ERROR;
416 if (args->host_ip6_gw_set)
418 args->error = vnet_netlink_add_ip6_route (0, 0, &args->host_ip6_gw);
421 args->rv = VNET_API_ERROR_NETLINK_ERROR;
426 /* switch back to old net namespace */
427 if (args->host_namespace)
429 if (setns (old_netns_fd, CLONE_NEWNET) == -1)
431 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
432 args->error = clib_error_return_unix (0, "setns '%s'",
433 args->host_namespace);
438 if (args->host_mtu_set)
441 vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size);
444 args->rv = VNET_API_ERROR_NETLINK_ERROR;
448 else if (tm->host_mtu_size != 0)
451 vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size);
454 args->rv = VNET_API_ERROR_NETLINK_ERROR;
457 args->host_mtu_set = 1;
458 args->host_mtu_size = tm->host_mtu_size;
461 for (i = 0; i < num_q_pairs; i++)
463 if (i < vif->num_rxqs && (args->error =
464 virtio_vring_init (vm, vif, RX_QUEUE (i),
467 args->rv = VNET_API_ERROR_INIT_FAILED;
471 if (i < vif->num_txqs && (args->error =
472 virtio_vring_init (vm, vif, TX_QUEUE (i),
475 args->rv = VNET_API_ERROR_INIT_FAILED;
480 /* setup features and memtable */
481 i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region);
482 vhost_mem = clib_mem_alloc (i);
483 clib_memset (vhost_mem, 0, i);
484 vhost_mem->nregions = 1;
485 vhost_mem->regions[0].memory_size = vpm->max_size;
486 vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
487 vhost_mem->regions[0].userspace_addr =
488 vhost_mem->regions[0].guest_phys_addr;
490 for (i = 0; i < vhost_mem->nregions; i++)
491 virtio_log_debug (vif, "memtable region %u memory_size 0x%lx "
492 "guest_phys_addr 0x%lx userspace_addr 0x%lx", i,
493 vhost_mem->regions[0].memory_size,
494 vhost_mem->regions[0].guest_phys_addr,
495 vhost_mem->regions[0].userspace_addr);
498 for (i = 0; i < num_q_pairs; i++)
500 int fd = vif->vhost_fds[i];
501 _IOCTL (fd, VHOST_SET_FEATURES, &vif->features);
502 virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx",
504 _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem);
505 virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd);
508 /* finish initializing queue pair */
509 for (i = 0; i < num_q_pairs * 2; i++)
511 struct vhost_vring_addr addr = { 0 };
512 struct vhost_vring_state state = { 0 };
513 struct vhost_vring_file file = { 0 };
514 virtio_vring_t *vring;
516 int fd = vif->vhost_fds[qp];
520 if (qp >= vif->num_txqs)
522 vring = vec_elt_at_index (vif->txq_vrings, qp);
526 if (qp >= vif->num_rxqs)
528 vring = vec_elt_at_index (vif->rxq_vrings, qp);
531 addr.index = state.index = file.index = vring->queue_id & 1;
532 state.num = vring->size;
533 virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
534 state.index, state.num);
535 _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
538 addr.desc_user_addr = pointer_to_uword (vring->desc);
539 addr.avail_user_addr = pointer_to_uword (vring->avail);
540 addr.used_user_addr = pointer_to_uword (vring->used);
542 virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x "
543 "desc_user_addr 0x%lx avail_user_addr 0x%lx "
544 "used_user_addr 0x%lx", fd, addr.index,
545 addr.flags, addr.desc_user_addr, addr.avail_user_addr,
546 addr.used_user_addr);
547 _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr);
549 file.fd = vring->call_fd;
550 virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d",
551 fd, file.index, file.fd);
552 _IOCTL (fd, VHOST_SET_VRING_CALL, &file);
554 file.fd = vring->kick_fd;
555 virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d",
556 fd, file.index, file.fd);
557 _IOCTL (fd, VHOST_SET_VRING_KICK, &file);
560 virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d",
561 fd, file.index, file.fd);
562 _IOCTL (fd, VHOST_NET_SET_BACKEND, &file);
565 if (!args->mac_addr_set)
566 ethernet_mac_address_generate (args->mac_addr.bytes);
568 clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6);
570 vif->host_if_name = format (0, "%s%c", host_if_name, 0);
571 vif->net_ns = format (0, "%s%c", args->host_namespace, 0);
572 vif->host_bridge = format (0, "%s%c", args->host_bridge, 0);
573 vif->host_mtu_size = args->host_mtu_size;
574 clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 6);
575 vif->host_ip4_prefix_len = args->host_ip4_prefix_len;
576 vif->host_ip6_prefix_len = args->host_ip6_prefix_len;
577 if (args->host_ip4_prefix_len)
578 clib_memcpy (&vif->host_ip4_addr, &args->host_ip4_addr, 4);
579 if (args->host_ip6_prefix_len)
580 clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16);
582 args->error = ethernet_register_interface (vnm, virtio_device_class.index,
586 virtio_eth_flag_change);
589 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
593 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1);
594 sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
595 vif->sw_if_index = sw->sw_if_index;
596 args->sw_if_index = vif->sw_if_index;
598 hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
599 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
600 if (args->tap_flags & TAP_FLAG_GSO)
602 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
603 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
605 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
607 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
609 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
610 virtio_input_node.index);
612 for (i = 0; i < vif->num_rxqs; i++)
614 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0);
615 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i,
616 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
619 vif->per_interface_next_index = ~0;
620 virtio_vring_set_numa_node (vm, vif, RX_QUEUE (0));
621 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
622 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
623 VNET_HW_INTERFACE_FLAG_LINK_UP);
624 vif->cxq_vring = NULL;
631 ASSERT (args->error == 0);
633 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
639 clib_mem_free (vhost_mem);
640 if (old_netns_fd != -1)
641 close (old_netns_fd);
647 tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
649 vnet_main_t *vnm = vnet_get_main ();
650 virtio_main_t *mm = &virtio_main;
653 vnet_hw_interface_t *hw;
655 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
656 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
657 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
659 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
661 if (vif->type != VIRTIO_IF_TYPE_TAP)
662 return VNET_API_ERROR_INVALID_INTERFACE;
664 /* bring down the interface */
665 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
666 vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0);
667 for (i = 0; i < vif->num_rxqs; i++)
668 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i);
670 ethernet_delete_interface (vnm, vif->hw_if_index);
671 vif->hw_if_index = ~0;
679 tap_csum_offload_enable_disable (vlib_main_t * vm, u32 sw_if_index,
682 vnet_main_t *vnm = vnet_get_main ();
683 virtio_main_t *mm = &virtio_main;
685 vnet_hw_interface_t *hw;
686 clib_error_t *err = 0;
688 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
690 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
691 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
693 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
695 const unsigned int csum_offload_on = TUN_F_CSUM;
696 const unsigned int csum_offload_off = 0;
697 unsigned int offload = enable_disable ? csum_offload_on : csum_offload_off;
698 _IOCTL (vif->tap_fd, TUNSETOFFLOAD, offload);
699 vif->gso_enabled = 0;
700 vif->csum_offload_enabled = enable_disable ? 1 : 0;
702 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
704 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
709 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) ==
712 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
717 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) !=
720 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
727 clib_warning ("Error %s checksum offload on sw_if_index %d",
728 enable_disable ? "enabling" : "disabling", sw_if_index);
729 return VNET_API_ERROR_SYSCALL_ERROR_3;
735 tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable)
737 vnet_main_t *vnm = vnet_get_main ();
738 virtio_main_t *mm = &virtio_main;
740 vnet_hw_interface_t *hw;
741 clib_error_t *err = 0;
743 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
745 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
746 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
748 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
750 const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
751 const unsigned int gso_off = 0;
752 unsigned int offload = enable_disable ? gso_on : gso_off;
753 _IOCTL (vif->tap_fd, TUNSETOFFLOAD, offload);
754 vif->gso_enabled = enable_disable ? 1 : 0;
755 vif->csum_offload_enabled = 0;
758 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0)
760 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
761 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
766 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
768 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
769 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
776 clib_warning ("Error %s gso on sw_if_index %d",
777 enable_disable ? "enabling" : "disabling", sw_if_index);
778 return VNET_API_ERROR_SYSCALL_ERROR_3;
784 tap_dump_ifs (tap_interface_details_t ** out_tapids)
786 vnet_main_t *vnm = vnet_get_main ();
787 virtio_main_t *mm = &virtio_main;
789 virtio_vring_t *vring;
790 vnet_hw_interface_t *hi;
791 tap_interface_details_t *r_tapids = NULL;
792 tap_interface_details_t *tapid = NULL;
795 pool_foreach (vif, mm->interfaces,
796 if (vif->type != VIRTIO_IF_TYPE_TAP)
798 vec_add2(r_tapids, tapid, 1);
799 clib_memset (tapid, 0, sizeof (*tapid));
801 tapid->sw_if_index = vif->sw_if_index;
802 hi = vnet_get_hw_interface (vnm, vif->hw_if_index);
803 clib_memcpy(tapid->dev_name, hi->name,
804 MIN (ARRAY_LEN (tapid->dev_name) - 1,
805 strlen ((const char *) hi->name)));
806 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
807 tapid->rx_ring_sz = vring->size;
808 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
809 tapid->tx_ring_sz = vring->size;
810 clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6);
811 if (vif->host_if_name)
813 clib_memcpy(tapid->host_if_name, vif->host_if_name,
814 MIN (ARRAY_LEN (tapid->host_if_name) - 1,
815 strlen ((const char *) vif->host_if_name)));
819 clib_memcpy(tapid->host_namespace, vif->net_ns,
820 MIN (ARRAY_LEN (tapid->host_namespace) - 1,
821 strlen ((const char *) vif->net_ns)));
823 if (vif->host_bridge)
825 clib_memcpy(tapid->host_bridge, vif->host_bridge,
826 MIN (ARRAY_LEN (tapid->host_bridge) - 1,
827 strlen ((const char *) vif->host_bridge)));
829 if (vif->host_ip4_prefix_len)
830 clib_memcpy(tapid->host_ip4_addr.as_u8, &vif->host_ip4_addr, 4);
831 tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len;
832 if (vif->host_ip6_prefix_len)
833 clib_memcpy(tapid->host_ip6_addr.as_u8, &vif->host_ip6_addr, 16);
834 tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len;
835 tapid->host_mtu_size = vif->host_mtu_size;
839 *out_tapids = r_tapids;
844 static clib_error_t *
845 tap_mtu_config (vlib_main_t * vm, unformat_input_t * input)
847 tap_main_t *tm = &tap_main;
849 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
851 if (unformat (input, "host-mtu %d", &tm->host_mtu_size))
854 return clib_error_return (0, "unknown input `%U'",
855 format_unformat_error, input);
861 /* tap { host-mtu <size> } configuration. */
862 VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap");
864 static clib_error_t *
865 tap_init (vlib_main_t * vm)
867 tap_main_t *tm = &tap_main;
868 clib_error_t *error = 0;
870 tm->log_default = vlib_log_register_class ("tap", 0);
871 vlib_log_debug (tm->log_default, "initialized");
873 tm->host_mtu_size = 0;
878 VLIB_INIT_FUNCTION (tap_init);
881 * fd.io coding-style-patch-verification: ON
884 * eval: (c-set-style "gnu")