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 VNET_HW_INTERFACE_CLASS (tun_device_hw_interface_class, static) =
64 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
69 virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
73 //TODO On MTU change call vnet_netlink_set_if_mtu
78 open_netns_fd (char *netns)
83 if (strncmp (netns, "pid:", 4) == 0)
84 s = format (0, "/proc/%u/ns/net%c", atoi (netns + 4), 0);
85 else if (netns[0] == '/')
86 s = format (0, "%s%c", netns, 0);
88 s = format (0, "/var/run/netns/%s%c", netns, 0);
90 fd = open ((char *) s, O_RDONLY);
95 #define TAP_MAX_INSTANCE 1024
98 tap_free (vlib_main_t * vm, virtio_if_t * vif)
100 virtio_main_t *mm = &virtio_main;
101 tap_main_t *tm = &tap_main;
102 clib_error_t *err = 0;
106 vec_foreach_index (i, vif->vhost_fds) if (vif->vhost_fds[i] != -1)
107 close (vif->vhost_fds[i]);
108 vec_foreach_index (i, vif->rxq_vrings)
109 virtio_vring_free_rx (vm, vif, RX_QUEUE (i));
110 vec_foreach_index (i, vif->txq_vrings)
111 virtio_vring_free_tx (vm, vif, TX_QUEUE (i));
114 _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0);
115 tap_log_dbg (vif, "TUNSETPERSIST: unset");
117 vec_foreach_index (i, vif->tap_fds) close (vif->tap_fds[i]);
119 vec_free (vif->vhost_fds);
120 vec_free (vif->rxq_vrings);
121 vec_free (vif->txq_vrings);
122 vec_free (vif->host_if_name);
123 vec_free (vif->net_ns);
124 vec_free (vif->host_bridge);
125 clib_error_free (vif->error);
127 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0);
128 clib_memset (vif, 0, sizeof (*vif));
129 pool_put (mm->interfaces, vif);
133 tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
135 vlib_thread_main_t *thm = vlib_get_thread_main ();
136 vlib_physmem_main_t *vpm = &vm->physmem_main;
137 vnet_main_t *vnm = vnet_get_main ();
138 virtio_main_t *vim = &virtio_main;
139 tap_main_t *tm = &tap_main;
140 vnet_sw_interface_t *sw;
141 vnet_hw_interface_t *hw;
142 int i, j, num_vhost_queues;
143 int old_netns_fd = -1;
144 struct ifreq ifr = {.ifr_flags = IFF_NO_PI | IFF_VNET_HDR };
145 struct ifreq get_ifr = {.ifr_flags = 0 };
147 struct vhost_memory *vhost_mem = 0;
148 virtio_if_t *vif = 0;
149 clib_error_t *err = 0;
150 unsigned int tap_features;
151 int tfd = -1, qfd = -1, vfd = -1, nfd = -1;
152 char *host_if_name = 0;
153 unsigned int offload = 0;
157 if (clib_bitmap_get (tm->tap_ids, args->id))
159 args->rv = VNET_API_ERROR_INVALID_INTERFACE;
160 args->error = clib_error_return (0, "interface already exists");
166 args->id = clib_bitmap_first_clear (tm->tap_ids);
169 if (args->id > TAP_MAX_INSTANCE)
171 args->rv = VNET_API_ERROR_UNSPECIFIED;
172 args->error = clib_error_return (0, "cannot find free interface id");
176 pool_get_zero (vim->interfaces, vif);
178 if (args->tap_flags & TAP_FLAG_TUN)
180 vif->type = VIRTIO_IF_TYPE_TUN;
181 ifr.ifr_flags |= IFF_TUN;
182 args->tap_flags &= ~(TAP_FLAG_GSO | TAP_FLAG_CSUM_OFFLOAD);
186 vif->type = VIRTIO_IF_TYPE_TAP;
187 ifr.ifr_flags |= IFF_TAP;
190 vif->dev_instance = vif - vim->interfaces;
192 vif->num_txqs = thm->n_vlib_mains;
193 vif->num_rxqs = clib_max (args->num_rx_queues, 1);
195 if (args->tap_flags & TAP_FLAG_ATTACH)
197 if (args->host_if_name != NULL)
199 host_if_name = (char *) args->host_if_name;
200 clib_memcpy (ifr.ifr_name, host_if_name,
201 clib_min (IFNAMSIZ, strlen (host_if_name)));
205 args->rv = VNET_API_ERROR_NO_MATCHING_INTERFACE;
206 err = clib_error_return (0, "host_if_name is not provided");
209 if (args->host_namespace)
211 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
212 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
214 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
215 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
216 args->host_namespace);
219 if (setns (nfd, CLONE_NEWNET) == -1)
221 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
222 args->error = clib_error_return_unix (0, "setns '%s'",
223 args->host_namespace);
229 if ((tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
231 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
232 args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
235 vec_add1 (vif->tap_fds, tfd);
236 tap_log_dbg (vif, "open tap fd %d", tfd);
238 _IOCTL (tfd, TUNGETFEATURES, &tap_features);
239 tap_log_dbg (vif, "TUNGETFEATURES: features 0x%lx", tap_features);
240 if ((tap_features & IFF_VNET_HDR) == 0)
242 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
243 args->error = clib_error_return (0, "vhost-net backend not available");
247 if ((tap_features & IFF_MULTI_QUEUE) == 0)
249 if (vif->num_rxqs > 1)
251 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
252 args->error = clib_error_return (0, "multiqueue not supported");
255 vif->num_rxqs = vif->num_txqs = 1;
258 ifr.ifr_flags |= IFF_MULTI_QUEUE;
260 hdrsz = sizeof (struct virtio_net_hdr_v1);
261 if (args->tap_flags & TAP_FLAG_GSO)
263 offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
264 vif->gso_enabled = 1;
266 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
268 offload = TUN_F_CSUM;
269 vif->csum_offload_enabled = 1;
272 _IOCTL (tfd, TUNSETIFF, (void *) &ifr);
273 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd,
274 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
276 vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
277 tap_log_dbg (vif, "ifindex %d", vif->ifindex);
279 if (!args->host_if_name)
280 host_if_name = ifr.ifr_ifrn.ifrn_name;
282 host_if_name = (char *) args->host_if_name;
285 * unset the persistence when attaching to existing
288 if (args->tap_flags & TAP_FLAG_ATTACH)
290 _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 0);
291 tap_log_dbg (vif, "TUNSETPERSIST: unset");
294 /* set the persistence */
295 if (args->tap_flags & TAP_FLAG_PERSIST)
297 _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 1);
298 tap_log_dbg (vif, "TUNSETPERSIST: set");
300 /* verify persistence is set, read the flags */
301 _IOCTL (tfd, TUNGETIFF, (void *) &get_ifr);
302 tap_log_dbg (vif, "TUNGETIFF: flags 0x%lx", get_ifr.ifr_flags);
303 if ((get_ifr.ifr_flags & IFF_PERSIST) == 0)
305 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
306 args->error = clib_error_return (0, "persistence not supported");
311 /* create additional queues on the linux side.
312 * we create as many linux queue pairs as we have rx queues
314 for (i = 1; i < vif->num_rxqs; i++)
316 if ((qfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
318 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
319 args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
322 _IOCTL (qfd, TUNSETIFF, (void *) &ifr);
323 tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", qfd,
324 ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
325 vec_add1 (vif->tap_fds, qfd);
328 for (i = 0; i < vif->num_rxqs; i++)
330 tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u",
331 vif->tap_fds[i], hdrsz);
332 _IOCTL (vif->tap_fds[i], TUNSETVNETHDRSZ, &hdrsz);
335 tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", vif->tap_fds[i], j);
336 _IOCTL (vif->tap_fds[i], TUNSETSNDBUF, &j);
338 tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", vif->tap_fds[i],
340 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
342 if (fcntl (vif->tap_fds[i], F_SETFL, O_NONBLOCK) < 0)
344 err = clib_error_return_unix (0, "fcntl(tfd, F_SETFL, O_NONBLOCK)");
345 tap_log_err (vif, "set nonblocking: %U", format_clib_error, err);
350 /* open as many vhost-net fds as required and set ownership */
351 num_vhost_queues = clib_max (vif->num_rxqs, vif->num_txqs);
352 for (i = 0; i < num_vhost_queues; i++)
354 if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
356 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
357 args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
360 vec_add1 (vif->vhost_fds, vfd);
361 virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i);
362 _IOCTL (vfd, VHOST_SET_OWNER, 0);
363 virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd);
366 _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features);
367 virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx",
368 vif->remote_features);
370 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
372 args->rv = VNET_API_ERROR_UNSUPPORTED;
373 args->error = clib_error_return (0, "vhost-net backend doesn't support "
374 "VIRTIO_NET_F_MRG_RXBUF feature");
378 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
381 args->rv = VNET_API_ERROR_UNSUPPORTED;
382 args->error = clib_error_return (0, "vhost-net backend doesn't support "
383 "VIRTIO_RING_F_INDIRECT_DESC feature");
387 if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1)) == 0)
389 args->rv = VNET_API_ERROR_UNSUPPORTED;
390 args->error = clib_error_return (0, "vhost-net backend doesn't support "
391 "VIRTIO_F_VERSION_1 features");
395 vif->features |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
396 vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
397 vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
399 virtio_set_net_hdr_size (vif);
401 if (!(args->tap_flags & TAP_FLAG_ATTACH))
403 /* if namespace is specified, all further netlink messages should be executed
404 after we change our net namespace */
405 if (args->host_namespace)
407 old_netns_fd = open ("/proc/self/ns/net", O_RDONLY);
408 if ((nfd = open_netns_fd ((char *) args->host_namespace)) == -1)
410 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
411 args->error = clib_error_return_unix (0, "open_netns_fd '%s'",
412 args->host_namespace);
415 args->error = vnet_netlink_set_link_netns (vif->ifindex, nfd,
419 args->rv = VNET_API_ERROR_NETLINK_ERROR;
422 if (setns (nfd, CLONE_NEWNET) == -1)
424 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
425 args->error = clib_error_return_unix (0, "setns '%s'",
426 args->host_namespace);
429 if ((vif->ifindex = if_nametoindex (host_if_name)) == 0)
431 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
432 args->error = clib_error_return_unix (0, "if_nametoindex '%s'",
437 else if (host_if_name)
440 vnet_netlink_set_link_name (vif->ifindex, host_if_name);
443 args->rv = VNET_API_ERROR_NETLINK_ERROR;
449 if (vif->type == VIRTIO_IF_TYPE_TAP)
451 if (ethernet_mac_address_is_zero (args->host_mac_addr.bytes))
452 ethernet_mac_address_generate (args->host_mac_addr.bytes);
453 args->error = vnet_netlink_set_link_addr (vif->ifindex,
454 args->host_mac_addr.bytes);
457 args->rv = VNET_API_ERROR_NETLINK_ERROR;
462 if (args->host_bridge)
464 args->error = vnet_netlink_set_link_master (vif->ifindex,
465 (char *) args->host_bridge);
468 args->rv = VNET_API_ERROR_NETLINK_ERROR;
473 if (args->host_ip4_prefix_len)
475 args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
476 &args->host_ip4_addr,
477 args->host_ip4_prefix_len);
480 args->rv = VNET_API_ERROR_NETLINK_ERROR;
485 if (args->host_ip6_prefix_len)
487 args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
488 &args->host_ip6_addr,
489 args->host_ip6_prefix_len);
492 args->rv = VNET_API_ERROR_NETLINK_ERROR;
497 args->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
500 args->rv = VNET_API_ERROR_NETLINK_ERROR;
504 if (args->host_ip4_gw_set)
506 args->error = vnet_netlink_add_ip4_route (0, 0, &args->host_ip4_gw);
509 args->rv = VNET_API_ERROR_NETLINK_ERROR;
514 if (args->host_ip6_gw_set)
516 args->error = vnet_netlink_add_ip6_route (0, 0, &args->host_ip6_gw);
519 args->rv = VNET_API_ERROR_NETLINK_ERROR;
524 if (args->host_mtu_set)
527 vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size);
530 args->rv = VNET_API_ERROR_NETLINK_ERROR;
534 else if (tm->host_mtu_size != 0)
537 vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size);
540 args->rv = VNET_API_ERROR_NETLINK_ERROR;
543 args->host_mtu_set = 1;
544 args->host_mtu_size = tm->host_mtu_size;
547 /* switch back to old net namespace */
548 if (args->host_namespace)
550 if (setns (old_netns_fd, CLONE_NEWNET) == -1)
552 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
553 args->error = clib_error_return_unix (0, "setns '%s'",
554 args->host_namespace);
559 for (i = 0; i < num_vhost_queues; i++)
561 if (i < vif->num_rxqs && (args->error =
562 virtio_vring_init (vm, vif, RX_QUEUE (i),
565 args->rv = VNET_API_ERROR_INIT_FAILED;
569 if (i < vif->num_txqs && (args->error =
570 virtio_vring_init (vm, vif, TX_QUEUE (i),
573 args->rv = VNET_API_ERROR_INIT_FAILED;
578 /* setup features and memtable */
579 i = sizeof (struct vhost_memory) + sizeof (struct vhost_memory_region);
580 vhost_mem = clib_mem_alloc (i);
581 clib_memset (vhost_mem, 0, i);
582 vhost_mem->nregions = 1;
583 vhost_mem->regions[0].memory_size = vpm->max_size;
584 vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
585 vhost_mem->regions[0].userspace_addr =
586 vhost_mem->regions[0].guest_phys_addr;
588 for (i = 0; i < vhost_mem->nregions; i++)
589 virtio_log_debug (vif, "memtable region %u memory_size 0x%lx "
590 "guest_phys_addr 0x%lx userspace_addr 0x%lx", i,
591 vhost_mem->regions[0].memory_size,
592 vhost_mem->regions[0].guest_phys_addr,
593 vhost_mem->regions[0].userspace_addr);
596 for (i = 0; i < num_vhost_queues; i++)
598 int fd = vif->vhost_fds[i];
599 _IOCTL (fd, VHOST_SET_FEATURES, &vif->features);
600 virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx",
602 _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem);
603 virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd);
606 /* finish initializing queue pair */
607 for (i = 0; i < num_vhost_queues * 2; i++)
609 struct vhost_vring_addr addr = { 0 };
610 struct vhost_vring_state state = { 0 };
611 struct vhost_vring_file file = { 0 };
612 virtio_vring_t *vring;
614 int fd = vif->vhost_fds[qp];
618 if (qp >= vif->num_txqs)
620 vring = vec_elt_at_index (vif->txq_vrings, qp);
624 if (qp >= vif->num_rxqs)
626 vring = vec_elt_at_index (vif->rxq_vrings, qp);
629 addr.index = state.index = file.index = vring->queue_id & 1;
630 state.num = vring->size;
631 virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
632 state.index, state.num);
633 _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
636 addr.desc_user_addr = pointer_to_uword (vring->desc);
637 addr.avail_user_addr = pointer_to_uword (vring->avail);
638 addr.used_user_addr = pointer_to_uword (vring->used);
640 virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x "
641 "desc_user_addr 0x%lx avail_user_addr 0x%lx "
642 "used_user_addr 0x%lx", fd, addr.index,
643 addr.flags, addr.desc_user_addr, addr.avail_user_addr,
644 addr.used_user_addr);
645 _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr);
647 file.fd = vring->call_fd;
648 virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d",
649 fd, file.index, file.fd);
650 _IOCTL (fd, VHOST_SET_VRING_CALL, &file);
652 file.fd = vring->kick_fd;
653 virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d",
654 fd, file.index, file.fd);
655 _IOCTL (fd, VHOST_SET_VRING_KICK, &file);
657 file.fd = vif->tap_fds[qp % vif->num_rxqs];
658 virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d",
659 fd, file.index, file.fd);
660 _IOCTL (fd, VHOST_NET_SET_BACKEND, &file);
663 if (vif->type == VIRTIO_IF_TYPE_TAP)
665 if (!args->mac_addr_set)
666 ethernet_mac_address_generate (args->mac_addr.bytes);
668 clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6);
670 vif->host_if_name = format (0, "%s%c", host_if_name, 0);
671 vif->net_ns = format (0, "%s%c", args->host_namespace, 0);
672 vif->host_bridge = format (0, "%s%c", args->host_bridge, 0);
673 vif->host_mtu_size = args->host_mtu_size;
674 clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 6);
675 vif->host_ip4_prefix_len = args->host_ip4_prefix_len;
676 vif->host_ip6_prefix_len = args->host_ip6_prefix_len;
677 if (args->host_ip4_prefix_len)
678 clib_memcpy (&vif->host_ip4_addr, &args->host_ip4_addr, 4);
679 if (args->host_ip6_prefix_len)
680 clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16);
682 if (vif->type != VIRTIO_IF_TYPE_TUN)
685 ethernet_register_interface (vnm, virtio_device_class.index,
686 vif->dev_instance, vif->mac_addr,
688 virtio_eth_flag_change);
691 args->rv = VNET_API_ERROR_INVALID_REGISTRATION;
698 vif->hw_if_index = vnet_register_interface
699 (vnm, virtio_device_class.index,
700 vif->dev_instance /* device instance */ ,
701 tun_device_hw_interface_class.index, vif->dev_instance);
704 tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1);
705 sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
706 vif->sw_if_index = sw->sw_if_index;
707 args->sw_if_index = vif->sw_if_index;
709 hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
710 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_INT_MODE;
711 if (args->tap_flags & TAP_FLAG_GSO)
713 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
714 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
716 else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
718 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
720 vnet_hw_interface_set_input_node (vnm, vif->hw_if_index,
721 virtio_input_node.index);
723 for (i = 0; i < vif->num_rxqs; i++)
725 vnet_hw_interface_assign_rx_thread (vnm, vif->hw_if_index, i, ~0);
726 vnet_hw_interface_set_rx_mode (vnm, vif->hw_if_index, i,
727 VNET_HW_INTERFACE_RX_MODE_DEFAULT);
728 virtio_vring_set_numa_node (vm, vif, RX_QUEUE (i));
731 vif->per_interface_next_index = ~0;
732 vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
733 vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
734 VNET_HW_INTERFACE_FLAG_LINK_UP);
735 vif->cxq_vring = NULL;
742 ASSERT (args->error == 0);
744 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
747 tap_log_err (vif, "%U", format_clib_error, args->error);
751 clib_mem_free (vhost_mem);
752 if (old_netns_fd != -1)
753 close (old_netns_fd);
759 tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
761 vnet_main_t *vnm = vnet_get_main ();
762 virtio_main_t *mm = &virtio_main;
765 vnet_hw_interface_t *hw;
767 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
768 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
769 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
771 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
773 if ((vif->type != VIRTIO_IF_TYPE_TAP) && (vif->type != VIRTIO_IF_TYPE_TUN))
774 return VNET_API_ERROR_INVALID_INTERFACE;
776 /* bring down the interface */
777 vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
778 vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0);
779 for (i = 0; i < vif->num_rxqs; i++)
780 vnet_hw_interface_unassign_rx_thread (vnm, vif->hw_if_index, i);
782 if (vif->type == VIRTIO_IF_TYPE_TAP)
783 ethernet_delete_interface (vnm, vif->hw_if_index);
784 else /* VIRTIO_IF_TYPE_TUN */
785 vnet_delete_hw_interface (vnm, vif->hw_if_index);
786 vif->hw_if_index = ~0;
794 tap_csum_offload_enable_disable (vlib_main_t * vm, u32 sw_if_index,
797 vnet_main_t *vnm = vnet_get_main ();
798 virtio_main_t *mm = &virtio_main;
800 vnet_hw_interface_t *hw;
801 clib_error_t *err = 0;
804 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
806 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
807 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
809 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
811 if (vif->type == VIRTIO_IF_TYPE_TUN)
812 return VNET_API_ERROR_UNIMPLEMENTED;
814 const unsigned int csum_offload_on = TUN_F_CSUM;
815 const unsigned int csum_offload_off = 0;
816 unsigned int offload = enable_disable ? csum_offload_on : csum_offload_off;
817 vec_foreach_index (i, vif->tap_fds)
818 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
819 vif->gso_enabled = 0;
820 vif->csum_offload_enabled = enable_disable ? 1 : 0;
822 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
824 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO;
829 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) ==
832 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
837 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) !=
840 hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
847 clib_warning ("Error %s checksum offload on sw_if_index %d",
848 enable_disable ? "enabling" : "disabling", sw_if_index);
849 return VNET_API_ERROR_SYSCALL_ERROR_3;
855 tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable)
857 vnet_main_t *vnm = vnet_get_main ();
858 virtio_main_t *mm = &virtio_main;
860 vnet_hw_interface_t *hw;
861 clib_error_t *err = 0;
864 hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
866 if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
867 return VNET_API_ERROR_INVALID_SW_IF_INDEX;
869 vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
871 if (vif->type == VIRTIO_IF_TYPE_TUN)
872 return VNET_API_ERROR_UNIMPLEMENTED;
874 const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
875 const unsigned int gso_off = 0;
876 unsigned int offload = enable_disable ? gso_on : gso_off;
877 vec_foreach_index (i, vif->tap_fds)
878 _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
879 vif->gso_enabled = enable_disable ? 1 : 0;
880 vif->csum_offload_enabled = 0;
883 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0)
885 hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
886 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
891 if ((hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) != 0)
893 hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO |
894 VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD);
901 clib_warning ("Error %s gso on sw_if_index %d",
902 enable_disable ? "enabling" : "disabling", sw_if_index);
903 return VNET_API_ERROR_SYSCALL_ERROR_3;
909 tap_dump_ifs (tap_interface_details_t ** out_tapids)
911 vnet_main_t *vnm = vnet_get_main ();
912 virtio_main_t *mm = &virtio_main;
914 virtio_vring_t *vring;
915 vnet_hw_interface_t *hi;
916 tap_interface_details_t *r_tapids = NULL;
917 tap_interface_details_t *tapid = NULL;
920 pool_foreach (vif, mm->interfaces,
921 if (vif->type != VIRTIO_IF_TYPE_TAP)
923 vec_add2(r_tapids, tapid, 1);
924 clib_memset (tapid, 0, sizeof (*tapid));
926 tapid->sw_if_index = vif->sw_if_index;
927 hi = vnet_get_hw_interface (vnm, vif->hw_if_index);
928 clib_memcpy(tapid->dev_name, hi->name,
929 MIN (ARRAY_LEN (tapid->dev_name) - 1,
930 strlen ((const char *) hi->name)));
931 vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
932 tapid->rx_ring_sz = vring->size;
933 vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
934 tapid->tx_ring_sz = vring->size;
935 clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6);
936 if (vif->host_if_name)
938 clib_memcpy(tapid->host_if_name, vif->host_if_name,
939 MIN (ARRAY_LEN (tapid->host_if_name) - 1,
940 strlen ((const char *) vif->host_if_name)));
944 clib_memcpy(tapid->host_namespace, vif->net_ns,
945 MIN (ARRAY_LEN (tapid->host_namespace) - 1,
946 strlen ((const char *) vif->net_ns)));
948 if (vif->host_bridge)
950 clib_memcpy(tapid->host_bridge, vif->host_bridge,
951 MIN (ARRAY_LEN (tapid->host_bridge) - 1,
952 strlen ((const char *) vif->host_bridge)));
954 if (vif->host_ip4_prefix_len)
955 clib_memcpy(tapid->host_ip4_addr.as_u8, &vif->host_ip4_addr, 4);
956 tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len;
957 if (vif->host_ip6_prefix_len)
958 clib_memcpy(tapid->host_ip6_addr.as_u8, &vif->host_ip6_addr, 16);
959 tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len;
960 tapid->host_mtu_size = vif->host_mtu_size;
964 *out_tapids = r_tapids;
969 static clib_error_t *
970 tap_mtu_config (vlib_main_t * vm, unformat_input_t * input)
972 tap_main_t *tm = &tap_main;
974 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
976 if (unformat (input, "host-mtu %d", &tm->host_mtu_size))
979 return clib_error_return (0, "unknown input `%U'",
980 format_unformat_error, input);
986 /* tap { host-mtu <size> } configuration. */
987 VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap");
989 static clib_error_t *
990 tap_init (vlib_main_t * vm)
992 tap_main_t *tm = &tap_main;
993 clib_error_t *error = 0;
995 tm->log_default = vlib_log_register_class ("tap", 0);
996 vlib_log_debug (tm->log_default, "initialized");
998 tm->host_mtu_size = 0;
1003 VLIB_INIT_FUNCTION (tap_init);
1006 * fd.io coding-style-patch-verification: ON
1009 * eval: (c-set-style "gnu")