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 <sys/eventfd.h>
26 #include <net/if_arp.h>
30 #include <linux/netlink.h>
31 #include <linux/rtnetlink.h>
33 #include <vlib/vlib.h>
34 #include <vlib/physmem.h>
35 #include <vlib/unix/unix.h>
36 #include <vnet/ethernet/ethernet.h>
37 #include <vnet/ip/ip4_packet.h>
38 #include <vnet/ip/ip6_packet.h>
39 #include <vnet/devices/netlink.h>
40 #include <vnet/devices/virtio/virtio.h>
41 #include <vnet/devices/tap/tap.h>
45 #define tap_log_err(dev, f, ...) \
46 vlib_log (VLIB_LOG_LEVEL_ERR, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
47 #define tap_log_dbg(dev, f, ...) \
48 vlib_log (VLIB_LOG_LEVEL_DEBUG, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
50 #define _IOCTL(fd,a,...) \
51 if (ioctl (fd, a, __VA_ARGS__) < 0) \
53 err = clib_error_return_unix (0, "ioctl(" #a ")"); \
54 tap_log_err (vif, "%U", format_clib_error, err); \
59 VNET_HW_INTERFACE_CLASS (tun_device_hw_interface_class, static) =
62 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
67 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
71 //TODO On MTU change call vnet_netlink_set_if_mtu
76 open_netns_fd (char *netns)
81 if (strncmp (netns, "pid:", 4) == 0)
82 s = format (0, "/proc/%u/ns/net%c", atoi (netns + 4), 0);
83 else if (netns[0] == '/')
84 s = format (0, "%s%c", netns, 0);
86 s = format (0, "/var/run/netns/%s%c", netns, 0);
88 fd = open ((char *) s, O_RDONLY);
93 #define TAP_MAX_INSTANCE 1024
96 tap_free (vlib_main_t * vm, virtio_if_t * vif)
98 virtio_main_t *mm = &virtio_main;
99 tap_main_t *tm = &tap_main;
100 clib_error_t *err = 0;
104 vec_foreach_index (i, vif->vhost_fds) if (vif->vhost_fds[i] != -1)
105 close (vif->vhost_fds[i]);
106 vec_foreach_index (i, vif->rxq_vrings)
107 virtio_vring_free_rx (vm, vif, RX_QUEUE (i));
108 vec_foreach_index (i, vif->txq_vrings)
109 virtio_vring_free_tx (vm, vif, TX_QUEUE (i));
112 _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0);
113 tap_log_dbg (vif, "TUNSETPERSIST: unset");
115 vec_foreach_index (i, vif->tap_fds) close (vif->tap_fds[i]);
117 vec_free (vif->vhost_fds);
118 vec_free (vif->rxq_vrings);
119 vec_free (vif->txq_vrings);
120 vec_free (vif->host_if_name);
121 vec_free (vif->net_ns);
122 vec_free (vif->host_bridge);
123 clib_error_free (vif->error);
125 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0);
126 clib_memset (vif, 0, sizeof (*vif));
127 pool_put (mm->interfaces, vif);
131 tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
133 vlib_thread_main_t *thm = vlib_get_thread_main ();
134 vlib_physmem_main_t *vpm = &vm->physmem_main;
135 vnet_main_t *vnm = vnet_get_main ();
136 virtio_main_t *vim = &virtio_main;
137 tap_main_t *tm = &tap_main;
138 vnet_sw_interface_t *sw;
139 vnet_hw_interface_t *hw;
140 int i, num_vhost_queues;
141 int old_netns_fd = -1;
142 struct ifreq ifr = {.ifr_flags = IFF_NO_PI | IFF_VNET_HDR };
143 struct ifreq get_ifr = {.ifr_flags = 0 };
145 vhost_memory_t *vhost_mem = 0;
146 virtio_if_t *vif = 0;
147 clib_error_t *err = 0;
148 unsigned int tap_features;
149 int tfd = -1, qfd = -1, vfd = -1, nfd = -1;
150 char *host_if_name = 0;
151 unsigned int offload = 0;
156 if (clib_bitmap_get (tm->tap_ids, args->id))
158 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
159 args->error = clib_error_return (0, "interface already exists");
165 args->id = clib_bitmap_first_clear (tm->tap_ids);
168 if (args->id > TAP_MAX_INSTANCE)
170 args->rv = VNET_API_ERROR_UNSPECIFIED;
171 args->error = clib_error_return (0, "cannot find free interface id");
175 pool_get_zero (vim->interfaces, vif);
177 if (args->tap_flags & TAP_FLAG_TUN)
179 vif->type = VIRTIO_IF_TYPE_TUN;
180 ifr.ifr_flags |= IFF_TUN;
183 * From kernel 4.20, xdp support has been added in tun_sendmsg.
184 * If sndbuf == INT_MAX, vhost batches the packet and processes
185 * them using xdp data path for tun driver. It assumes packets
186 * are ethernet frames (It needs to be fixed).
187 * To avoid xdp data path in tun driver, sndbuf value should
190 sndbuf = INT_MAX - 1;
194 vif->type = VIRTIO_IF_TYPE_TAP;
195 ifr.ifr_flags |= IFF_TAP;
199 vif->dev_instance = vif - vim->interfaces;
201 vif->num_txqs = thm->n_vlib_mains;
202 vif->num_rxqs = clib_max (args->num_rx_queues, 1);
204 if (args->tap_flags & TAP_FLAG_ATTACH)
206 if (args->host_if_name != NULL)
208 host_if_name = (char *) args->host_if_name;
209 clib_memcpy (ifr.ifr_name, host_if_name,
210 clib_min (IFNAMSIZ, strlen (host_if_name)));
214 args->rv = VNET_API_ERROR_NO_MATCHING_INTERFACE;
215 err = clib_error_return (0, "host_if_name is not provided");
218 if (args->host_namespace)
220 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
221 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
223 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
224 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
225 args->host_namespace);
228 if (setns (nfd, CLONE_NEWNET) == -1)
230 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
231 args->error = clib_error_return_unix (0, "setns '%s'",
232 args->host_namespace);
238 if ((tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
240 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
241 args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
244 vec_add1 (vif->tap_fds, tfd);
245 tap_log_dbg (vif, "open tap fd %d", tfd);
247 _IOCTL (tfd, TUNGETFEATURES, &tap_features);
248 tap_log_dbg (vif, "TUNGETFEATURES: features 0x%lx", tap_features);
249 if ((tap_features & IFF_VNET_HDR) == 0)
251 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
252 args->error = clib_error_return (0, "vhost-net backend not available");
256 if ((tap_features & IFF_MULTI_QUEUE) == 0)
258 if (vif->num_rxqs > 1)
260 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
261 args->error = clib_error_return (0, "multiqueue not supported");
264 vif->num_rxqs = vif->num_txqs = 1;
267 ifr.ifr_flags |= IFF_MULTI_QUEUE;
269 hdrsz = sizeof (virtio_net_hdr_v1_t);
270 if (args->tap_flags & TAP_FLAG_GSO)
272 offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
273 vif->gso_enabled = 1;
275 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
277 offload = TUN_F_CSUM;
278 vif->csum_offload_enabled = 1;
281 _IOCTL (tfd, TUNSETIFF, (void *) &ifr);
282 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd,
283 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
285 vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
286 tap_log_dbg (vif, "ifindex %d", vif->ifindex);
288 if (!args->host_if_name)
289 host_if_name = ifr.ifr_ifrn.ifrn_name;
291 host_if_name = (char *) args->host_if_name;
294 * unset the persistence when attaching to existing
297 if (args->tap_flags & TAP_FLAG_ATTACH)
299 _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 0);
300 tap_log_dbg (vif, "TUNSETPERSIST: unset");
303 /* set the persistence */
304 if (args->tap_flags & TAP_FLAG_PERSIST)
306 _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 1);
307 tap_log_dbg (vif, "TUNSETPERSIST: set");
309 /* verify persistence is set, read the flags */
310 _IOCTL (tfd, TUNGETIFF, (void *) &get_ifr);
311 tap_log_dbg (vif, "TUNGETIFF: flags 0x%lx", get_ifr.ifr_flags);
312 if ((get_ifr.ifr_flags & IFF_PERSIST) == 0)
314 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
315 args->error = clib_error_return (0, "persistence not supported");
320 /* create additional queues on the linux side.
321 * we create as many linux queue pairs as we have rx queues
323 for (i = 1; i < vif->num_rxqs; i++)
325 if ((qfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
327 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
328 args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
331 _IOCTL (qfd, TUNSETIFF, (void *) &ifr);
332 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", qfd,
333 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
334 vec_add1 (vif->tap_fds, qfd);
337 for (i = 0; i < vif->num_rxqs; i++)
339 tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u",
340 vif->tap_fds[i], hdrsz);
341 _IOCTL (vif->tap_fds[i], TUNSETVNETHDRSZ, &hdrsz);
343 tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", vif->tap_fds[i],
345 _IOCTL (vif->tap_fds[i], TUNSETSNDBUF, &sndbuf);
347 tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", vif->tap_fds[i],
349 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
351 if (fcntl (vif->tap_fds[i], F_SETFL, O_NONBLOCK) < 0)
353 err = clib_error_return_unix (0, "fcntl(tfd, F_SETFL, O_NONBLOCK)");
354 tap_log_err (vif, "set nonblocking: %U", format_clib_error, err);
359 /* open as many vhost-net fds as required and set ownership */
360 num_vhost_queues = clib_max (vif->num_rxqs, vif->num_txqs);
361 for (i = 0; i < num_vhost_queues; i++)
363 if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
365 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
366 args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
369 vec_add1 (vif->vhost_fds, vfd);
370 virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i);
371 _IOCTL (vfd, VHOST_SET_OWNER, 0);
372 virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd);
375 _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features);
376 virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx",
377 vif->remote_features);
379 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
381 args->rv = VNET_API_ERROR_UNSUPPORTED;
382 args->error = clib_error_return (0, "vhost-net backend doesn't support "
383 "VIRTIO_NET_F_MRG_RXBUF feature");
387 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
390 args->rv = VNET_API_ERROR_UNSUPPORTED;
391 args->error = clib_error_return (0, "vhost-net backend doesn't support "
392 "VIRTIO_RING_F_INDIRECT_DESC feature");
396 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1)) == 0)
398 args->rv = VNET_API_ERROR_UNSUPPORTED;
399 args->error = clib_error_return (0, "vhost-net backend doesn't support "
400 "VIRTIO_F_VERSION_1 features");
404 vif->features |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
405 vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
406 vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
408 virtio_set_net_hdr_size (vif);
410 if (!(args->tap_flags & TAP_FLAG_ATTACH))
412 /* if namespace is specified, all further netlink messages should be executed
413 after we change our net namespace */
414 if (args->host_namespace)
416 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
417 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
419 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
420 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
421 args->host_namespace);
424 args->error = vnet_netlink_set_link_netns (vif->ifindex, nfd,
428 args->rv = VNET_API_ERROR_NETLINK_ERROR;
431 if (setns (nfd, CLONE_NEWNET) == -1)
433 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
434 args->error = clib_error_return_unix (0, "setns '%s'",
435 args->host_namespace);
438 if ((vif->ifindex = if_nametoindex (host_if_name)) == 0)
440 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
441 args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
446 else if (host_if_name)
449 vnet_netlink_set_link_name (vif->ifindex, host_if_name);
452 args->rv = VNET_API_ERROR_NETLINK_ERROR;
458 if (vif->type == VIRTIO_IF_TYPE_TAP)
460 if (ethernet_mac_address_is_zero (args->host_mac_addr.bytes))
461 ethernet_mac_address_generate (args->host_mac_addr.bytes);
462 args->error = vnet_netlink_set_link_addr (vif->ifindex,
463 args->host_mac_addr.bytes);
466 args->rv = VNET_API_ERROR_NETLINK_ERROR;
470 if (args->host_bridge)
472 args->error = vnet_netlink_set_link_master (vif->ifindex,
477 args->rv = VNET_API_ERROR_NETLINK_ERROR;
483 if (args->host_ip4_prefix_len)
485 args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
486 &args->host_ip4_addr,
487 args->host_ip4_prefix_len);
490 args->rv = VNET_API_ERROR_NETLINK_ERROR;
495 if (args->host_ip6_prefix_len)
497 args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
498 &args->host_ip6_addr,
499 args->host_ip6_prefix_len);
502 args->rv = VNET_API_ERROR_NETLINK_ERROR;
507 args->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
510 args->rv = VNET_API_ERROR_NETLINK_ERROR;
514 if (args->host_ip4_gw_set)
516 args->error = vnet_netlink_add_ip4_route (0, 0, &args->host_ip4_gw);
519 args->rv = VNET_API_ERROR_NETLINK_ERROR;
524 if (args->host_ip6_gw_set)
526 args->error = vnet_netlink_add_ip6_route (0, 0, &args->host_ip6_gw);
529 args->rv = VNET_API_ERROR_NETLINK_ERROR;
534 if (args->host_mtu_set)
537 vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size);
540 args->rv = VNET_API_ERROR_NETLINK_ERROR;
544 else if (tm->host_mtu_size != 0)
547 vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size);
550 args->rv = VNET_API_ERROR_NETLINK_ERROR;
553 args->host_mtu_set = 1;
554 args->host_mtu_size = tm->host_mtu_size;
557 /* switch back to old net namespace */
558 if (args->host_namespace)
560 if (setns (old_netns_fd, CLONE_NEWNET) == -1)
562 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
563 args->error = clib_error_return_unix (0, "setns '%s'",
564 args->host_namespace);
569 for (i = 0; i < num_vhost_queues; i++)
571 if (i < vif->num_rxqs && (args->error =
572 virtio_vring_init (vm, vif, RX_QUEUE (i),
575 args->rv = VNET_API_ERROR_INIT_FAILED;
579 if (i < vif->num_txqs && (args->error =
580 virtio_vring_init (vm, vif, TX_QUEUE (i),
583 args->rv = VNET_API_ERROR_INIT_FAILED;
588 /* setup features and memtable */
589 i = sizeof (vhost_memory_t) + sizeof (vhost_memory_region_t);
590 vhost_mem = clib_mem_alloc (i);
591 clib_memset (vhost_mem, 0, i);
592 vhost_mem->nregions = 1;
593 vhost_mem->regions[0].memory_size = vpm->max_size;
594 vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
595 vhost_mem->regions[0].userspace_addr =
596 vhost_mem->regions[0].guest_phys_addr;
598 for (i = 0; i < vhost_mem->nregions; i++)
599 virtio_log_debug (vif, "memtable region %u memory_size 0x%lx "
600 "guest_phys_addr 0x%lx userspace_addr 0x%lx", i,
601 vhost_mem->regions[0].memory_size,
602 vhost_mem->regions[0].guest_phys_addr,
603 vhost_mem->regions[0].userspace_addr);
606 for (i = 0; i < num_vhost_queues; i++)
608 int fd = vif->vhost_fds[i];
609 _IOCTL (fd, VHOST_SET_FEATURES, &vif->features);
610 virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx",
612 _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem);
613 virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd);
616 /* finish initializing queue pair */
617 for (i = 0; i < num_vhost_queues * 2; i++)
619 vhost_vring_addr_t addr = { 0 };
620 vhost_vring_state_t state = { 0 };
621 vhost_vring_file_t file = { 0 };
622 virtio_vring_t *vring;
624 int fd = vif->vhost_fds[qp];
628 if (qp >= vif->num_txqs)
630 vring = vec_elt_at_index (vif->txq_vrings, qp);
634 if (qp >= vif->num_rxqs)
636 vring = vec_elt_at_index (vif->rxq_vrings, qp);
639 addr.index = state.index = file.index = vring->queue_id & 1;
640 state.num = vring->size;
641 virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
642 state.index, state.num);
643 _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
646 addr.desc_user_addr = pointer_to_uword (vring->desc);
647 addr.avail_user_addr = pointer_to_uword (vring->avail);
648 addr.used_user_addr = pointer_to_uword (vring->used);
650 virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x "
651 "desc_user_addr 0x%lx avail_user_addr 0x%lx "
652 "used_user_addr 0x%lx", fd, addr.index,
653 addr.flags, addr.desc_user_addr, addr.avail_user_addr,
654 addr.used_user_addr);
655 _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr);
657 file.fd = vring->call_fd;
658 virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d",
659 fd, file.index, file.fd);
660 _IOCTL (fd, VHOST_SET_VRING_CALL, &file);
662 file.fd = vring->kick_fd;
663 virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d",
664 fd, file.index, file.fd);
665 _IOCTL (fd, VHOST_SET_VRING_KICK, &file);
667 file.fd = vif->tap_fds[qp % vif->num_rxqs];
668 virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d",
669 fd, file.index, file.fd);
670 _IOCTL (fd, VHOST_NET_SET_BACKEND, &file);
673 if (vif->type == VIRTIO_IF_TYPE_TAP)
675 if (!args->mac_addr_set)
676 ethernet_mac_address_generate (args->mac_addr.bytes);
678 clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6);
679 vif->host_bridge = format (0, "%s%c", args->host_bridge, 0);
681 vif->host_if_name = format (0, "%s%c", host_if_name, 0);
682 vif->net_ns = format (0, "%s%c", args->host_namespace, 0);
683 vif->host_mtu_size = args->host_mtu_size;
684 vif->tap_flags = args->tap_flags;
685 clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 6);
686 vif->host_ip4_prefix_len = args->host_ip4_prefix_len;
687 vif->host_ip6_prefix_len = args->host_ip6_prefix_len;
688 if (args->host_ip4_prefix_len)
689 clib_memcpy (&vif->host_ip4_addr, &args->host_ip4_addr, 4);
690 if (args->host_ip6_prefix_len)
691 clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16);
693 if (vif->type != VIRTIO_IF_TYPE_TUN)
696 ethernet_register_interface (vnm, virtio_device_class.index,
697 vif->dev_instance, vif->mac_addr,
699 virtio_eth_flag_change);
702 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
709 vif->hw_if_index = vnet_register_interface
710 (vnm, virtio_device_class.index,
711 vif->dev_instance /* device instance */ ,
712 tun_device_hw_interface_class.index, vif->dev_instance);
715 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1);
716 sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
717 vif->sw_if_index = sw->sw_if_index;
718 args->sw_if_index = vif->sw_if_index;
720 hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
721 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
722 if (args->tap_flags & TAP_FLAG_GSO)
724 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
725 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
727 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
729 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
731 if ((args->tap_flags & TAP_FLAG_GSO)
732 && (args->tap_flags & TAP_FLAG_GRO_COALESCE))
734 virtio_set_packet_coalesce (vif);
736 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
737 virtio_input_node.index);
739 for (i = 0; i < vif->num_rxqs; i++)
741 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0);
742 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i,
743 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
744 virtio_vring_set_numa_node (vm, vif, RX_QUEUE (i));
747 vif->per_interface_next_index = ~0;
748 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
749 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
750 VNET_HW_INTERFACE_FLAG_LINK_UP);
751 vif->cxq_vring = NULL;
758 ASSERT (args->error == 0);
760 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
763 tap_log_err (vif, "%U", format_clib_error, args->error);
767 clib_mem_free (vhost_mem);
768 if (old_netns_fd != -1)
769 close (old_netns_fd);
775 tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
777 vnet_main_t *vnm = vnet_get_main ();
778 virtio_main_t *mm = &virtio_main;
781 vnet_hw_interface_t *hw;
783 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
784 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
785 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
787 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
789 if ((vif->type != VIRTIO_IF_TYPE_TAP) && (vif->type != VIRTIO_IF_TYPE_TUN))
790 return VNET_API_ERROR_INVALID_INTERFACE;
792 /* bring down the interface */
793 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
794 vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0);
795 for (i = 0; i < vif->num_rxqs; i++)
796 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i);
798 if (vif->type == VIRTIO_IF_TYPE_TAP)
799 ethernet_delete_interface (vnm, vif->hw_if_index);
800 else /* VIRTIO_IF_TYPE_TUN */
801 vnet_delete_hw_interface (vnm, vif->hw_if_index);
802 vif->hw_if_index = ~0;
810 tap_csum_offload_enable_disable (vlib_main_t * vm, u32 sw_if_index,
813 vnet_main_t *vnm = vnet_get_main ();
814 virtio_main_t *mm = &virtio_main;
816 vnet_hw_interface_t *hw;
817 clib_error_t *err = 0;
820 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
822 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
823 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
825 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
827 const unsigned int csum_offload_on = TUN_F_CSUM;
828 const unsigned int csum_offload_off = 0;
829 unsigned int offload = enable_disable ? csum_offload_on : csum_offload_off;
830 vec_foreach_index (i, vif->tap_fds)
831 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
832 vif->gso_enabled = 0;
833 vif->packet_coalesce = 0;
834 vif->csum_offload_enabled = enable_disable ? 1 : 0;
836 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
838 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
843 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) ==
846 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
851 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) !=
854 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
861 clib_warning ("Error %s checksum offload on sw_if_index %d",
862 enable_disable ? "enabling" : "disabling", sw_if_index);
863 return VNET_API_ERROR_SYSCALL_ERROR_3;
869 tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable,
870 int is_packet_coalesce)
872 vnet_main_t *vnm = vnet_get_main ();
873 virtio_main_t *mm = &virtio_main;
875 vnet_hw_interface_t *hw;
876 clib_error_t *err = 0;
879 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
881 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
882 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
884 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
886 const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
887 const unsigned int gso_off = 0;
888 unsigned int offload = enable_disable ? gso_on : gso_off;
889 vec_foreach_index (i, vif->tap_fds)
890 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
891 vif->gso_enabled = enable_disable ? 1 : 0;
892 vif->csum_offload_enabled = 0;
895 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0)
897 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
898 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
900 if (is_packet_coalesce)
902 virtio_set_packet_coalesce (vif);
907 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
909 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
910 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
912 vif->packet_coalesce = 0;
918 clib_warning ("Error %s gso on sw_if_index %d",
919 enable_disable ? "enabling" : "disabling", sw_if_index);
920 return VNET_API_ERROR_SYSCALL_ERROR_3;
926 tap_dump_ifs (tap_interface_details_t ** out_tapids)
928 vnet_main_t *vnm = vnet_get_main ();
929 virtio_main_t *mm = &virtio_main;
931 virtio_vring_t *vring;
932 vnet_hw_interface_t *hi;
933 tap_interface_details_t *r_tapids = NULL;
934 tap_interface_details_t *tapid = NULL;
937 pool_foreach (vif, mm->interfaces,
938 if ((vif->type != VIRTIO_IF_TYPE_TAP)
939 && (vif->type != VIRTIO_IF_TYPE_TUN))
941 vec_add2(r_tapids, tapid, 1);
942 clib_memset (tapid, 0, sizeof (*tapid));
944 tapid->sw_if_index = vif->sw_if_index;
945 hi = vnet_get_hw_interface (vnm, vif->hw_if_index);
946 clib_memcpy(tapid->dev_name, hi->name,
947 MIN (ARRAY_LEN (tapid->dev_name) - 1,
948 strlen ((const char *) hi->name)));
949 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
950 tapid->rx_ring_sz = vring->size;
951 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
952 tapid->tx_ring_sz = vring->size;
953 tapid->tap_flags = vif->tap_flags;
954 clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6);
955 if (vif->host_if_name)
957 clib_memcpy(tapid->host_if_name, vif->host_if_name,
958 MIN (ARRAY_LEN (tapid->host_if_name) - 1,
959 strlen ((const char *) vif->host_if_name)));
963 clib_memcpy(tapid->host_namespace, vif->net_ns,
964 MIN (ARRAY_LEN (tapid->host_namespace) - 1,
965 strlen ((const char *) vif->net_ns)));
967 if (vif->host_bridge)
969 clib_memcpy(tapid->host_bridge, vif->host_bridge,
970 MIN (ARRAY_LEN (tapid->host_bridge) - 1,
971 strlen ((const char *) vif->host_bridge)));
973 if (vif->host_ip4_prefix_len)
974 clib_memcpy(tapid->host_ip4_addr.as_u8, &vif->host_ip4_addr, 4);
975 tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len;
976 if (vif->host_ip6_prefix_len)
977 clib_memcpy(tapid->host_ip6_addr.as_u8, &vif->host_ip6_addr, 16);
978 tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len;
979 tapid->host_mtu_size = vif->host_mtu_size;
983 *out_tapids = r_tapids;
988 static clib_error_t *
989 tap_mtu_config (vlib_main_t * vm, unformat_input_t * input)
991 tap_main_t *tm = &tap_main;
993 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
995 if (unformat (input, "host-mtu %d", &tm->host_mtu_size))
998 return clib_error_return (0, "unknown input `%U'",
999 format_unformat_error, input);
1005 /* tap { host-mtu <size> } configuration. */
1006 VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap");
1008 static clib_error_t *
1009 tap_init (vlib_main_t * vm)
1011 tap_main_t *tm = &tap_main;
1012 clib_error_t *error = 0;
1014 tm->log_default = vlib_log_register_class ("tap", 0);
1015 vlib_log_debug (tm->log_default, "initialized");
1017 tm->host_mtu_size = 0;
1022 VLIB_INIT_FUNCTION (tap_init);
1025 * fd.io coding-style-patch-verification: ON
1028 * eval: (c-set-style "gnu")