Line data Source code
1 : /*
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:
7 : *
8 : * http://www.apache.org/licenses/LICENSE-2.0
9 : *
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 : *------------------------------------------------------------------
16 : */
17 :
18 : #define _GNU_SOURCE
19 : #include <sys/types.h>
20 : #include <sys/stat.h>
21 : #include <sys/socket.h>
22 : #include <fcntl.h>
23 : #include <net/if.h>
24 : #include <linux/if_tun.h>
25 : #include <sys/ioctl.h>
26 : #include <linux/ethtool.h>
27 : #include <linux/sockios.h>
28 : #include <sys/eventfd.h>
29 : #include <net/if_arp.h>
30 : #include <limits.h>
31 :
32 : #include <linux/netlink.h>
33 : #include <linux/rtnetlink.h>
34 :
35 : #include <vlib/vlib.h>
36 : #include <vlib/physmem.h>
37 : #include <vlib/unix/unix.h>
38 : #include <vppinfra/linux/netns.h>
39 : #include <vnet/ethernet/ethernet.h>
40 : #include <vnet/ip/ip4_packet.h>
41 : #include <vnet/ip/ip6_packet.h>
42 : #include <vnet/devices/netlink.h>
43 : #include <vnet/devices/virtio/virtio.h>
44 : #include <vnet/devices/tap/tap.h>
45 :
46 : tap_main_t tap_main;
47 :
48 : #define tap_log_err(dev, f, ...) \
49 : vlib_log (VLIB_LOG_LEVEL_ERR, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
50 : #define tap_log_dbg(dev, f, ...) \
51 : vlib_log (VLIB_LOG_LEVEL_DEBUG, tap_main.log_default, "tap%u: " f, dev->dev_instance, ## __VA_ARGS__)
52 :
53 : #define _IOCTL(fd,a,...) \
54 : if (ioctl (fd, a, __VA_ARGS__) < 0) \
55 : { \
56 : err = clib_error_return_unix (0, "ioctl(" #a ")"); \
57 : tap_log_err (vif, "%U", format_clib_error, err); \
58 : goto error; \
59 : }
60 :
61 7279 : VNET_HW_INTERFACE_CLASS (tun_device_hw_interface_class, static) = {
62 : .name = "tun-device",
63 : .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
64 : .tx_hash_fn_type = VNET_HASH_FN_TYPE_IP,
65 : };
66 :
67 : #define TUN_MAX_PACKET_BYTES 65355
68 : #define TUN_MIN_PACKET_BYTES 64
69 : #define TUN_DEFAULT_PACKET_BYTES 1500
70 :
71 : static u32
72 456 : virtio_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
73 : u32 flags)
74 : {
75 : /* nothing for now */
76 : //TODO On MTU change call vnet_netlink_set_if_mtu
77 456 : return 0;
78 : }
79 :
80 : static clib_error_t *
81 0 : virtio_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
82 : u32 frame_size)
83 : {
84 : /* nothing for now */
85 0 : return 0;
86 : }
87 :
88 : #define TAP_MAX_INSTANCE 1024
89 :
90 : static void
91 300 : tap_free (vlib_main_t * vm, virtio_if_t * vif)
92 : {
93 300 : virtio_main_t *mm = &virtio_main;
94 300 : tap_main_t *tm = &tap_main;
95 300 : clib_error_t *err = 0;
96 : int i;
97 :
98 300 : virtio_pre_input_node_disable (vm, vif);
99 :
100 : /* *INDENT-OFF* */
101 600 : vec_foreach_index (i, vif->vhost_fds) if (vif->vhost_fds[i] != -1)
102 300 : close (vif->vhost_fds[i]);
103 600 : vec_foreach_index (i, vif->rxq_vrings)
104 300 : virtio_vring_free_rx (vm, vif, RX_QUEUE (i));
105 600 : vec_foreach_index (i, vif->txq_vrings)
106 300 : virtio_vring_free_tx (vm, vif, TX_QUEUE (i));
107 : /* *INDENT-ON* */
108 :
109 300 : if (vif->tap_fds)
110 : {
111 300 : _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0);
112 300 : tap_log_dbg (vif, "TUNSETPERSIST: unset");
113 : }
114 0 : error:
115 600 : vec_foreach_index (i, vif->tap_fds) close (vif->tap_fds[i]);
116 :
117 300 : vec_free (vif->tap_fds);
118 300 : vec_free (vif->vhost_fds);
119 300 : vec_free (vif->rxq_vrings);
120 300 : vec_free (vif->txq_vrings);
121 300 : vec_free (vif->host_if_name);
122 300 : vec_free (vif->net_ns);
123 300 : vec_free (vif->host_bridge);
124 300 : clib_error_free (vif->error);
125 :
126 300 : tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 0);
127 300 : clib_memset (vif, 0, sizeof (*vif));
128 300 : pool_put (mm->interfaces, vif);
129 300 : }
130 :
131 : void
132 300 : tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
133 : {
134 300 : vlib_thread_main_t *thm = vlib_get_thread_main ();
135 300 : vlib_physmem_main_t *vpm = &vm->physmem_main;
136 300 : vnet_main_t *vnm = vnet_get_main ();
137 300 : virtio_main_t *vim = &virtio_main;
138 300 : tap_main_t *tm = &tap_main;
139 : vnet_sw_interface_t *sw;
140 : vnet_hw_interface_t *hw;
141 : vnet_hw_if_caps_change_t cc;
142 : int i, num_vhost_queues;
143 300 : int old_netns_fd = -1;
144 300 : struct ifreq ifr = {.ifr_flags = IFF_NO_PI | IFF_VNET_HDR };
145 300 : struct ifreq get_ifr = {.ifr_flags = 0 };
146 : size_t hdrsz;
147 300 : vhost_memory_t *vhost_mem = 0;
148 300 : virtio_if_t *vif = 0;
149 300 : clib_error_t *err = 0;
150 : unsigned int tap_features;
151 300 : int tfd = -1, qfd = -1, vfd = -1, nfd = -1;
152 300 : char *host_if_name = 0;
153 300 : unsigned int offload = 0;
154 300 : int sndbuf = 0;
155 :
156 300 : if (args->id != ~0)
157 : {
158 300 : if (clib_bitmap_get (tm->tap_ids, args->id))
159 : {
160 0 : args->rv = VNET_API_ERROR_INVALID_INTERFACE;
161 0 : args->error = clib_error_return (0, "interface already exists");
162 0 : return;
163 : }
164 : }
165 : else
166 : {
167 0 : args->id = clib_bitmap_first_clear (tm->tap_ids);
168 : }
169 :
170 300 : if (args->id > TAP_MAX_INSTANCE)
171 : {
172 0 : args->rv = VNET_API_ERROR_UNSPECIFIED;
173 0 : args->error = clib_error_return (0, "cannot find free interface id");
174 0 : return;
175 : }
176 :
177 300 : pool_get_zero (vim->interfaces, vif);
178 :
179 300 : if (args->tap_flags & TAP_FLAG_TUN)
180 : {
181 48 : vif->type = VIRTIO_IF_TYPE_TUN;
182 48 : ifr.ifr_flags |= IFF_TUN;
183 :
184 : /*
185 : * From kernel 4.20, xdp support has been added in tun_sendmsg.
186 : * If sndbuf == INT_MAX, vhost batches the packet and processes
187 : * them using xdp data path for tun driver. It assumes packets
188 : * are ethernet frames (It needs to be fixed).
189 : * To avoid xdp data path in tun driver, sndbuf value should
190 : * be < INT_MAX.
191 : */
192 48 : sndbuf = INT_MAX - 1;
193 : }
194 : else
195 : {
196 252 : vif->type = VIRTIO_IF_TYPE_TAP;
197 252 : ifr.ifr_flags |= IFF_TAP;
198 252 : sndbuf = INT_MAX;
199 : }
200 :
201 300 : vif->dev_instance = vif - vim->interfaces;
202 300 : vif->id = args->id;
203 300 : vif->num_txqs = clib_max (args->num_tx_queues, thm->n_vlib_mains);
204 300 : vif->num_rxqs = clib_max (args->num_rx_queues, 1);
205 :
206 300 : if (args->tap_flags & TAP_FLAG_ATTACH)
207 : {
208 0 : if (args->host_if_name == NULL)
209 : {
210 0 : args->rv = VNET_API_ERROR_NO_MATCHING_INTERFACE;
211 0 : err = clib_error_return (0, "host_if_name is not provided");
212 0 : goto error;
213 : }
214 : }
215 :
216 : /* if namespace is specified, all further netlink messages should be executed
217 : * after we change our net namespace */
218 300 : if (args->host_namespace)
219 : {
220 300 : old_netns_fd = clib_netns_open (NULL /* self */);
221 300 : if ((nfd = clib_netns_open (args->host_namespace)) == -1)
222 : {
223 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
224 0 : args->error = clib_error_return_unix (0, "clib_netns_open '%s'",
225 : args->host_namespace);
226 0 : goto error;
227 : }
228 300 : if (clib_setns (nfd) == -1)
229 : {
230 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
231 0 : args->error =
232 0 : clib_error_return_unix (0, "setns '%s'", args->host_namespace);
233 0 : goto error;
234 : }
235 : }
236 :
237 300 : if (args->host_if_name != NULL)
238 : {
239 300 : host_if_name = (char *) args->host_if_name;
240 300 : clib_memcpy (ifr.ifr_name, host_if_name,
241 : clib_min (IFNAMSIZ, vec_len (host_if_name)));
242 : }
243 :
244 300 : if ((tfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
245 : {
246 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
247 0 : args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
248 0 : goto error;
249 : }
250 300 : vec_add1 (vif->tap_fds, tfd);
251 300 : tap_log_dbg (vif, "open tap fd %d", tfd);
252 :
253 300 : _IOCTL (tfd, TUNGETFEATURES, &tap_features);
254 300 : tap_log_dbg (vif, "TUNGETFEATURES: features 0x%lx", tap_features);
255 300 : if ((tap_features & IFF_VNET_HDR) == 0)
256 : {
257 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
258 0 : args->error = clib_error_return (0, "vhost-net backend not available");
259 0 : goto error;
260 : }
261 :
262 300 : if ((tap_features & IFF_MULTI_QUEUE) == 0)
263 : {
264 0 : if (vif->num_rxqs > 1)
265 : {
266 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
267 0 : args->error = clib_error_return (0, "multiqueue not supported");
268 0 : goto error;
269 : }
270 0 : vif->num_rxqs = vif->num_txqs = 1;
271 : }
272 : else
273 300 : ifr.ifr_flags |= IFF_MULTI_QUEUE;
274 :
275 300 : hdrsz = sizeof (vnet_virtio_net_hdr_v1_t);
276 300 : if (args->tap_flags & TAP_FLAG_GSO)
277 : {
278 180 : offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
279 180 : vif->gso_enabled = 1;
280 : }
281 120 : else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
282 : {
283 0 : offload = TUN_F_CSUM;
284 0 : vif->csum_offload_enabled = 1;
285 : }
286 :
287 300 : _IOCTL (tfd, TUNSETIFF, (void *) &ifr);
288 300 : tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", tfd,
289 : ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
290 :
291 300 : vif->ifindex = if_nametoindex (ifr.ifr_ifrn.ifrn_name);
292 300 : tap_log_dbg (vif, "ifindex %d", vif->ifindex);
293 :
294 300 : if (!args->host_if_name)
295 0 : host_if_name = ifr.ifr_ifrn.ifrn_name;
296 : else
297 300 : host_if_name = (char *) args->host_if_name;
298 :
299 : /*
300 : * unset the persistence when attaching to existing
301 : * interface
302 : */
303 300 : if (args->tap_flags & TAP_FLAG_ATTACH)
304 : {
305 0 : _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 0);
306 0 : tap_log_dbg (vif, "TUNSETPERSIST: unset");
307 : }
308 :
309 : /* set the persistence */
310 300 : if (args->tap_flags & TAP_FLAG_PERSIST)
311 : {
312 0 : _IOCTL (tfd, TUNSETPERSIST, (void *) (uintptr_t) 1);
313 0 : tap_log_dbg (vif, "TUNSETPERSIST: set");
314 :
315 : /* verify persistence is set, read the flags */
316 0 : _IOCTL (tfd, TUNGETIFF, (void *) &get_ifr);
317 0 : tap_log_dbg (vif, "TUNGETIFF: flags 0x%lx", get_ifr.ifr_flags);
318 0 : if ((get_ifr.ifr_flags & IFF_PERSIST) == 0)
319 : {
320 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
321 0 : args->error = clib_error_return (0, "persistence not supported");
322 0 : goto error;
323 : }
324 : }
325 :
326 : /* create additional queues on the linux side.
327 : * we create as many linux queue pairs as we have rx queues
328 : */
329 300 : for (i = 1; i < vif->num_rxqs; i++)
330 : {
331 0 : if ((qfd = open ("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0)
332 : {
333 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
334 0 : args->error = clib_error_return_unix (0, "open '/dev/net/tun'");
335 0 : goto error;
336 : }
337 0 : vec_add1 (vif->tap_fds, qfd);
338 0 : _IOCTL (qfd, TUNSETIFF, (void *) &ifr);
339 0 : tap_log_dbg (vif, "TUNSETIFF fd %d name %s flags 0x%x", qfd,
340 : ifr.ifr_ifrn.ifrn_name, ifr.ifr_flags);
341 : }
342 :
343 600 : for (i = 0; i < vif->num_rxqs; i++)
344 : {
345 300 : tap_log_dbg (vif, "TUNSETVNETHDRSZ: fd %d vnet_hdr_sz %u",
346 : vif->tap_fds[i], hdrsz);
347 300 : _IOCTL (vif->tap_fds[i], TUNSETVNETHDRSZ, &hdrsz);
348 :
349 300 : tap_log_dbg (vif, "TUNSETSNDBUF: fd %d sndbuf %d", vif->tap_fds[i],
350 : sndbuf);
351 300 : _IOCTL (vif->tap_fds[i], TUNSETSNDBUF, &sndbuf);
352 :
353 300 : tap_log_dbg (vif, "TUNSETOFFLOAD: fd %d offload 0x%lx", vif->tap_fds[i],
354 : offload);
355 300 : _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
356 :
357 300 : if (fcntl (vif->tap_fds[i], F_SETFL, O_NONBLOCK) < 0)
358 : {
359 0 : err = clib_error_return_unix (0, "fcntl(tfd, F_SETFL, O_NONBLOCK)");
360 0 : tap_log_err (vif, "set nonblocking: %U", format_clib_error, err);
361 0 : goto error;
362 : }
363 : }
364 :
365 : /* open as many vhost-net fds as required and set ownership */
366 300 : num_vhost_queues = clib_max (vif->num_rxqs, vif->num_txqs);
367 600 : for (i = 0; i < num_vhost_queues; i++)
368 : {
369 300 : if ((vfd = open ("/dev/vhost-net", O_RDWR | O_NONBLOCK)) < 0)
370 : {
371 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
372 0 : args->error = clib_error_return_unix (0, "open '/dev/vhost-net'");
373 0 : goto error;
374 : }
375 300 : vec_add1 (vif->vhost_fds, vfd);
376 300 : virtio_log_debug (vif, "open vhost-net fd %d qpair %u", vfd, i);
377 300 : _IOCTL (vfd, VHOST_SET_OWNER, 0);
378 300 : virtio_log_debug (vif, "VHOST_SET_OWNER: fd %u", vfd);
379 : }
380 :
381 300 : _IOCTL (vif->vhost_fds[0], VHOST_GET_FEATURES, &vif->remote_features);
382 300 : virtio_log_debug (vif, "VHOST_GET_FEATURES: features 0x%lx",
383 : vif->remote_features);
384 :
385 300 : if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF)) == 0)
386 : {
387 0 : args->rv = VNET_API_ERROR_UNSUPPORTED;
388 0 : args->error = clib_error_return (0, "vhost-net backend doesn't support "
389 : "VIRTIO_NET_F_MRG_RXBUF feature");
390 0 : goto error;
391 : }
392 :
393 300 : if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) ==
394 : 0)
395 : {
396 0 : args->rv = VNET_API_ERROR_UNSUPPORTED;
397 0 : args->error = clib_error_return (0, "vhost-net backend doesn't support "
398 : "VIRTIO_RING_F_INDIRECT_DESC feature");
399 0 : goto error;
400 : }
401 :
402 300 : if ((vif->remote_features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1)) == 0)
403 : {
404 0 : args->rv = VNET_API_ERROR_UNSUPPORTED;
405 0 : args->error = clib_error_return (0, "vhost-net backend doesn't support "
406 : "VIRTIO_F_VERSION_1 features");
407 0 : goto error;
408 : }
409 :
410 300 : vif->features |= VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF);
411 300 : vif->features |= VIRTIO_FEATURE (VIRTIO_F_VERSION_1);
412 300 : vif->features |= VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC);
413 :
414 300 : virtio_set_net_hdr_size (vif);
415 :
416 300 : if (vif->type == VIRTIO_IF_TYPE_TAP)
417 : {
418 252 : if (ethernet_mac_address_is_zero (args->host_mac_addr.bytes))
419 252 : ethernet_mac_address_generate (args->host_mac_addr.bytes);
420 504 : args->error = vnet_netlink_set_link_addr (vif->ifindex,
421 252 : args->host_mac_addr.bytes);
422 252 : if (args->error)
423 : {
424 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
425 0 : goto error;
426 : }
427 :
428 252 : if (args->host_bridge)
429 : {
430 0 : args->error = vnet_netlink_set_link_master (vif->ifindex,
431 : (char *)
432 0 : args->host_bridge);
433 0 : if (args->error)
434 : {
435 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
436 0 : goto error;
437 : }
438 : }
439 : }
440 :
441 300 : if (args->host_ip4_prefix_len)
442 : {
443 300 : args->error = vnet_netlink_add_ip4_addr (vif->ifindex,
444 150 : &args->host_ip4_addr,
445 150 : args->host_ip4_prefix_len);
446 150 : if (args->error)
447 : {
448 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
449 0 : goto error;
450 : }
451 : }
452 :
453 300 : if (args->host_ip6_prefix_len)
454 : {
455 300 : args->error = vnet_netlink_add_ip6_addr (vif->ifindex,
456 150 : &args->host_ip6_addr,
457 150 : args->host_ip6_prefix_len);
458 150 : if (args->error)
459 : {
460 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
461 0 : goto error;
462 : }
463 : }
464 :
465 300 : args->error = vnet_netlink_set_link_state (vif->ifindex, 1 /* UP */ );
466 300 : if (args->error)
467 : {
468 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
469 0 : goto error;
470 : }
471 :
472 300 : if (args->host_ip4_gw_set)
473 : {
474 12 : args->error = vnet_netlink_add_ip4_route (0, 0, &args->host_ip4_gw);
475 12 : if (args->error)
476 : {
477 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
478 0 : goto error;
479 : }
480 : }
481 :
482 300 : if (args->host_ip6_gw_set)
483 : {
484 12 : args->error = vnet_netlink_add_ip6_route (0, 0, &args->host_ip6_gw);
485 12 : if (args->error)
486 : {
487 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
488 0 : goto error;
489 : }
490 : }
491 :
492 300 : if (args->host_mtu_set)
493 : {
494 0 : args->error =
495 0 : vnet_netlink_set_link_mtu (vif->ifindex, args->host_mtu_size);
496 0 : if (args->error)
497 : {
498 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
499 0 : goto error;
500 : }
501 : }
502 300 : else if (tm->host_mtu_size != 0)
503 : {
504 0 : args->error =
505 0 : vnet_netlink_set_link_mtu (vif->ifindex, tm->host_mtu_size);
506 0 : if (args->error)
507 : {
508 0 : args->rv = VNET_API_ERROR_NETLINK_ERROR;
509 0 : goto error;
510 : }
511 0 : args->host_mtu_set = 1;
512 0 : args->host_mtu_size = tm->host_mtu_size;
513 : }
514 :
515 : /* switch back to old net namespace */
516 300 : if (args->host_namespace)
517 : {
518 300 : if (clib_setns (old_netns_fd) == -1)
519 : {
520 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
521 0 : args->error = clib_error_return_unix (0, "setns '%s'",
522 : args->host_namespace);
523 0 : goto error;
524 : }
525 : }
526 :
527 600 : for (i = 0; i < num_vhost_queues; i++)
528 : {
529 600 : if (i < vif->num_rxqs && (args->error =
530 300 : virtio_vring_init (vm, vif, RX_QUEUE (i),
531 300 : args->rx_ring_sz)))
532 : {
533 0 : args->rv = VNET_API_ERROR_INIT_FAILED;
534 0 : goto error;
535 : }
536 :
537 600 : if (i < vif->num_txqs && (args->error =
538 300 : virtio_vring_init (vm, vif, TX_QUEUE (i),
539 300 : args->tx_ring_sz)))
540 : {
541 0 : args->rv = VNET_API_ERROR_INIT_FAILED;
542 0 : goto error;
543 : }
544 : }
545 :
546 : /* setup features and memtable */
547 300 : i = sizeof (vhost_memory_t) + sizeof (vhost_memory_region_t);
548 300 : vhost_mem = clib_mem_alloc (i);
549 300 : clib_memset (vhost_mem, 0, i);
550 300 : vhost_mem->nregions = 1;
551 300 : vhost_mem->regions[0].memory_size = vpm->max_size;
552 300 : vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
553 300 : vhost_mem->regions[0].userspace_addr =
554 300 : vhost_mem->regions[0].guest_phys_addr;
555 :
556 600 : for (i = 0; i < vhost_mem->nregions; i++)
557 300 : virtio_log_debug (vif, "memtable region %u memory_size 0x%lx "
558 : "guest_phys_addr 0x%lx userspace_addr 0x%lx", i,
559 : vhost_mem->regions[0].memory_size,
560 : vhost_mem->regions[0].guest_phys_addr,
561 : vhost_mem->regions[0].userspace_addr);
562 :
563 :
564 600 : for (i = 0; i < num_vhost_queues; i++)
565 : {
566 300 : int fd = vif->vhost_fds[i];
567 300 : _IOCTL (fd, VHOST_SET_FEATURES, &vif->features);
568 300 : virtio_log_debug (vif, "VHOST_SET_FEATURES: fd %u features 0x%lx",
569 : fd, vif->features);
570 300 : _IOCTL (fd, VHOST_SET_MEM_TABLE, vhost_mem);
571 300 : virtio_log_debug (vif, "VHOST_SET_MEM_TABLE: fd %u", fd);
572 : }
573 :
574 : /* finish initializing queue pair */
575 900 : for (i = 0; i < num_vhost_queues * 2; i++)
576 : {
577 600 : vhost_vring_addr_t addr = { 0 };
578 600 : vhost_vring_state_t state = { 0 };
579 600 : vhost_vring_file_t file = { 0 };
580 : vnet_virtio_vring_t *vring;
581 600 : u16 qp = i >> 1;
582 600 : int fd = vif->vhost_fds[qp];
583 :
584 600 : if (i & 1)
585 : {
586 300 : if (qp >= vif->num_txqs)
587 0 : continue;
588 300 : vring = vec_elt_at_index (vif->txq_vrings, qp);
589 : }
590 : else
591 : {
592 300 : if (qp >= vif->num_rxqs)
593 0 : continue;
594 300 : vring = vec_elt_at_index (vif->rxq_vrings, qp);
595 : }
596 :
597 600 : addr.index = state.index = file.index = vring->queue_id & 1;
598 600 : state.num = vring->queue_size;
599 600 : virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
600 : state.index, state.num);
601 600 : _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
602 :
603 600 : addr.flags = 0;
604 600 : addr.desc_user_addr = pointer_to_uword (vring->desc);
605 600 : addr.avail_user_addr = pointer_to_uword (vring->avail);
606 600 : addr.used_user_addr = pointer_to_uword (vring->used);
607 :
608 600 : virtio_log_debug (vif, "VHOST_SET_VRING_ADDR fd %d index %u flags 0x%x "
609 : "desc_user_addr 0x%lx avail_user_addr 0x%lx "
610 : "used_user_addr 0x%lx", fd, addr.index,
611 : addr.flags, addr.desc_user_addr, addr.avail_user_addr,
612 : addr.used_user_addr);
613 600 : _IOCTL (fd, VHOST_SET_VRING_ADDR, &addr);
614 :
615 600 : file.fd = vring->call_fd;
616 600 : virtio_log_debug (vif, "VHOST_SET_VRING_CALL fd %d index %u call_fd %d",
617 : fd, file.index, file.fd);
618 600 : _IOCTL (fd, VHOST_SET_VRING_CALL, &file);
619 :
620 600 : file.fd = vring->kick_fd;
621 600 : virtio_log_debug (vif, "VHOST_SET_VRING_KICK fd %d index %u kick_fd %d",
622 : fd, file.index, file.fd);
623 600 : _IOCTL (fd, VHOST_SET_VRING_KICK, &file);
624 :
625 600 : file.fd = vif->tap_fds[qp % vif->num_rxqs];
626 600 : virtio_log_debug (vif, "VHOST_NET_SET_BACKEND fd %d index %u tap_fd %d",
627 : fd, file.index, file.fd);
628 600 : _IOCTL (fd, VHOST_NET_SET_BACKEND, &file);
629 : }
630 :
631 300 : if (vif->type == VIRTIO_IF_TYPE_TAP)
632 : {
633 252 : if (!args->mac_addr_set)
634 252 : ethernet_mac_address_generate (args->mac_addr.bytes);
635 :
636 252 : clib_memcpy (vif->mac_addr, args->mac_addr.bytes, 6);
637 252 : if (args->host_bridge)
638 0 : vif->host_bridge = format (0, "%s%c", args->host_bridge, 0);
639 : }
640 300 : vif->host_if_name = format (0, "%s%c", host_if_name, 0);
641 300 : if (args->host_namespace)
642 300 : vif->net_ns = format (0, "%s%c", args->host_namespace, 0);
643 300 : vif->host_mtu_size = args->host_mtu_size;
644 300 : vif->tap_flags = args->tap_flags;
645 300 : clib_memcpy (vif->host_mac_addr, args->host_mac_addr.bytes, 6);
646 300 : vif->host_ip4_prefix_len = args->host_ip4_prefix_len;
647 300 : vif->host_ip6_prefix_len = args->host_ip6_prefix_len;
648 300 : if (args->host_ip4_prefix_len)
649 150 : clib_memcpy (&vif->host_ip4_addr, &args->host_ip4_addr, 4);
650 300 : if (args->host_ip6_prefix_len)
651 150 : clib_memcpy (&vif->host_ip6_addr, &args->host_ip6_addr, 16);
652 :
653 300 : if (vif->type != VIRTIO_IF_TYPE_TUN)
654 : {
655 252 : vnet_eth_interface_registration_t eir = {};
656 :
657 252 : eir.dev_class_index = virtio_device_class.index;
658 252 : eir.dev_instance = vif->dev_instance;
659 252 : eir.address = vif->mac_addr;
660 252 : eir.cb.flag_change = virtio_eth_flag_change;
661 252 : eir.cb.set_max_frame_size = virtio_eth_set_max_frame_size;
662 252 : vif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
663 : }
664 : else
665 : {
666 48 : vif->hw_if_index = vnet_register_interface
667 : (vnm, virtio_device_class.index,
668 48 : vif->dev_instance /* device instance */ ,
669 48 : tun_device_hw_interface_class.index, vif->dev_instance);
670 :
671 : }
672 300 : tm->tap_ids = clib_bitmap_set (tm->tap_ids, vif->id, 1);
673 300 : sw = vnet_get_hw_sw_interface (vnm, vif->hw_if_index);
674 300 : vif->sw_if_index = sw->sw_if_index;
675 300 : args->sw_if_index = vif->sw_if_index;
676 300 : args->rv = 0;
677 300 : hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
678 300 : cc.mask = VNET_HW_IF_CAP_INT_MODE | VNET_HW_IF_CAP_TCP_GSO |
679 : VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
680 300 : cc.val = VNET_HW_IF_CAP_INT_MODE;
681 :
682 300 : if (args->tap_flags & TAP_FLAG_GSO)
683 180 : cc.val |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_TCP_CKSUM |
684 : VNET_HW_IF_CAP_TX_UDP_CKSUM;
685 120 : else if (args->tap_flags & TAP_FLAG_CSUM_OFFLOAD)
686 0 : cc.val |= VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
687 :
688 300 : if ((args->tap_flags & TAP_FLAG_GSO)
689 180 : && (args->tap_flags & TAP_FLAG_GRO_COALESCE))
690 : {
691 108 : virtio_set_packet_coalesce (vif);
692 : }
693 300 : if (vif->type == VIRTIO_IF_TYPE_TUN)
694 : {
695 48 : hw->min_frame_size = TUN_MIN_PACKET_BYTES;
696 48 : vnet_hw_interface_set_mtu (
697 : vnm, hw->hw_if_index,
698 48 : args->host_mtu_size ? args->host_mtu_size : TUN_DEFAULT_PACKET_BYTES);
699 : }
700 :
701 300 : vnet_hw_if_change_caps (vnm, vif->hw_if_index, &cc);
702 300 : virtio_pre_input_node_enable (vm, vif);
703 300 : virtio_vring_set_rx_queues (vm, vif);
704 300 : virtio_vring_set_tx_queues (vm, vif);
705 :
706 300 : vif->per_interface_next_index = ~0;
707 300 : vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
708 : VNET_HW_INTERFACE_FLAG_LINK_UP);
709 : /*
710 : * Host tun/tap driver link carrier state is "up" at creation. The
711 : * driver never changes this unless the backend (VPP) changes it using
712 : * TUNSETCARRIER ioctl(). See tap_set_carrier().
713 : */
714 300 : vif->host_carrier_up = 1;
715 :
716 300 : goto done;
717 :
718 0 : error:
719 0 : if (err)
720 : {
721 0 : ASSERT (args->error == 0);
722 0 : args->error = err;
723 0 : args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
724 : }
725 :
726 0 : tap_log_err (vif, "%U", format_clib_error, args->error);
727 0 : tap_free (vm, vif);
728 300 : done:
729 300 : if (vhost_mem)
730 300 : clib_mem_free (vhost_mem);
731 300 : if (old_netns_fd != -1)
732 : {
733 : /* in case we errored with a switched netns */
734 300 : clib_setns (old_netns_fd);
735 300 : close (old_netns_fd);
736 : }
737 300 : if (nfd != -1)
738 300 : close (nfd);
739 : }
740 :
741 : int
742 552 : tap_delete_if (vlib_main_t * vm, u32 sw_if_index)
743 : {
744 552 : vnet_main_t *vnm = vnet_get_main ();
745 552 : virtio_main_t *mm = &virtio_main;
746 : virtio_if_t *vif;
747 : vnet_hw_interface_t *hw;
748 :
749 552 : hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
750 552 : if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
751 252 : return VNET_API_ERROR_INVALID_SW_IF_INDEX;
752 :
753 300 : vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
754 :
755 300 : if ((vif->type != VIRTIO_IF_TYPE_TAP) && (vif->type != VIRTIO_IF_TYPE_TUN))
756 0 : return VNET_API_ERROR_INVALID_INTERFACE;
757 :
758 : /* bring down the interface */
759 300 : vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
760 300 : vnet_sw_interface_set_flags (vnm, vif->sw_if_index, 0);
761 :
762 300 : if (vif->type == VIRTIO_IF_TYPE_TAP)
763 252 : ethernet_delete_interface (vnm, vif->hw_if_index);
764 : else /* VIRTIO_IF_TYPE_TUN */
765 48 : vnet_delete_hw_interface (vnm, vif->hw_if_index);
766 300 : vif->hw_if_index = ~0;
767 :
768 300 : tap_free (vm, vif);
769 :
770 300 : return 0;
771 : }
772 :
773 : int
774 0 : tap_csum_offload_enable_disable (vlib_main_t * vm, u32 sw_if_index,
775 : int enable_disable)
776 : {
777 0 : vnet_main_t *vnm = vnet_get_main ();
778 0 : virtio_main_t *mm = &virtio_main;
779 : virtio_if_t *vif;
780 : vnet_hw_interface_t *hw;
781 : vnet_hw_if_caps_change_t cc;
782 0 : clib_error_t *err = 0;
783 0 : int i = 0;
784 :
785 0 : hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
786 :
787 0 : if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
788 0 : return VNET_API_ERROR_INVALID_SW_IF_INDEX;
789 :
790 0 : vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
791 :
792 0 : const unsigned int csum_offload_on = TUN_F_CSUM;
793 0 : const unsigned int csum_offload_off = 0;
794 0 : unsigned int offload = enable_disable ? csum_offload_on : csum_offload_off;
795 0 : vec_foreach_index (i, vif->tap_fds)
796 0 : _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
797 0 : vif->gso_enabled = 0;
798 0 : vif->packet_coalesce = 0;
799 :
800 0 : cc.mask = VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_L4_TX_CKSUM;
801 0 : if (enable_disable)
802 : {
803 0 : cc.val = VNET_HW_IF_CAP_L4_TX_CKSUM;
804 0 : vif->csum_offload_enabled = 1;
805 : }
806 : else
807 : {
808 0 : cc.val = 0;
809 0 : vif->csum_offload_enabled = 0;
810 : }
811 0 : vnet_hw_if_change_caps (vnm, vif->hw_if_index, &cc);
812 :
813 0 : error:
814 0 : if (err)
815 : {
816 0 : clib_warning ("Error %s checksum offload on sw_if_index %d",
817 : enable_disable ? "enabling" : "disabling", sw_if_index);
818 0 : return VNET_API_ERROR_SYSCALL_ERROR_3;
819 : }
820 0 : return 0;
821 : }
822 :
823 : int
824 0 : tap_gso_enable_disable (vlib_main_t * vm, u32 sw_if_index, int enable_disable,
825 : int is_packet_coalesce)
826 : {
827 0 : vnet_main_t *vnm = vnet_get_main ();
828 0 : virtio_main_t *mm = &virtio_main;
829 : virtio_if_t *vif;
830 : vnet_hw_interface_t *hw;
831 : vnet_hw_if_caps_change_t cc;
832 0 : clib_error_t *err = 0;
833 0 : int i = 0;
834 :
835 0 : hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index);
836 :
837 0 : if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
838 0 : return VNET_API_ERROR_INVALID_SW_IF_INDEX;
839 :
840 0 : vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
841 :
842 0 : const unsigned int gso_on = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
843 0 : const unsigned int gso_off = 0;
844 0 : unsigned int offload = enable_disable ? gso_on : gso_off;
845 0 : vec_foreach_index (i, vif->tap_fds)
846 0 : _IOCTL (vif->tap_fds[i], TUNSETOFFLOAD, offload);
847 :
848 0 : cc.mask = VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_L4_TX_CKSUM;
849 :
850 0 : if (enable_disable)
851 : {
852 0 : cc.val = cc.mask;
853 0 : vif->gso_enabled = 1;
854 0 : vif->csum_offload_enabled = 1;
855 0 : if (is_packet_coalesce)
856 0 : virtio_set_packet_coalesce (vif);
857 : }
858 : else
859 : {
860 0 : cc.val = 0;
861 0 : vif->gso_enabled = 0;
862 0 : vif->csum_offload_enabled = 0;
863 0 : vif->packet_coalesce = 0;
864 : }
865 0 : vnet_hw_if_change_caps (vnm, vif->hw_if_index, &cc);
866 :
867 0 : error:
868 0 : if (err)
869 : {
870 0 : clib_warning ("Error %s gso on sw_if_index %d",
871 : enable_disable ? "enabling" : "disabling", sw_if_index);
872 0 : return VNET_API_ERROR_SYSCALL_ERROR_3;
873 : }
874 0 : return 0;
875 : }
876 :
877 : int
878 0 : tap_dump_ifs (tap_interface_details_t ** out_tapids)
879 : {
880 0 : vnet_main_t *vnm = vnet_get_main ();
881 0 : virtio_main_t *mm = &virtio_main;
882 : virtio_if_t *vif;
883 : vnet_virtio_vring_t *vring;
884 : vnet_hw_interface_t *hi;
885 0 : tap_interface_details_t *r_tapids = NULL;
886 0 : tap_interface_details_t *tapid = NULL;
887 :
888 : /* *INDENT-OFF* */
889 0 : pool_foreach (vif, mm->interfaces) {
890 0 : if ((vif->type != VIRTIO_IF_TYPE_TAP)
891 0 : && (vif->type != VIRTIO_IF_TYPE_TUN))
892 0 : continue;
893 0 : vec_add2(r_tapids, tapid, 1);
894 0 : clib_memset (tapid, 0, sizeof (*tapid));
895 0 : tapid->id = vif->id;
896 0 : tapid->sw_if_index = vif->sw_if_index;
897 0 : hi = vnet_get_hw_interface (vnm, vif->hw_if_index);
898 0 : clib_memcpy(tapid->dev_name, hi->name,
899 : MIN (ARRAY_LEN (tapid->dev_name) - 1, vec_len (hi->name)));
900 0 : vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
901 0 : tapid->rx_ring_sz = vring->queue_size;
902 0 : vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
903 0 : tapid->tx_ring_sz = vring->queue_size;
904 0 : tapid->tap_flags = vif->tap_flags;
905 0 : clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6);
906 0 : if (vif->host_if_name)
907 : {
908 0 : clib_memcpy(tapid->host_if_name, vif->host_if_name,
909 : MIN (ARRAY_LEN (tapid->host_if_name) - 1,
910 : vec_len (vif->host_if_name)));
911 : }
912 0 : if (vif->net_ns)
913 : {
914 0 : clib_memcpy(tapid->host_namespace, vif->net_ns,
915 : MIN (ARRAY_LEN (tapid->host_namespace) - 1,
916 : vec_len (vif->net_ns)));
917 : }
918 0 : if (vif->host_bridge)
919 : {
920 0 : clib_memcpy(tapid->host_bridge, vif->host_bridge,
921 : MIN (ARRAY_LEN (tapid->host_bridge) - 1,
922 : vec_len (vif->host_bridge)));
923 : }
924 0 : if (vif->host_ip4_prefix_len)
925 0 : clib_memcpy(tapid->host_ip4_addr.as_u8, &vif->host_ip4_addr, 4);
926 0 : tapid->host_ip4_prefix_len = vif->host_ip4_prefix_len;
927 0 : if (vif->host_ip6_prefix_len)
928 0 : clib_memcpy(tapid->host_ip6_addr.as_u8, &vif->host_ip6_addr, 16);
929 0 : tapid->host_ip6_prefix_len = vif->host_ip6_prefix_len;
930 0 : tapid->host_mtu_size = vif->host_mtu_size;
931 : }
932 : /* *INDENT-ON* */
933 :
934 0 : *out_tapids = r_tapids;
935 :
936 0 : return 0;
937 : }
938 :
939 : /*
940 : * Set host tap/tun interface carrier state so it will appear to host
941 : * applications that the interface's link state changed.
942 : *
943 : * If the kernel we're building against does not have support for the
944 : * TUNSETCARRIER ioctl command, do nothing.
945 : */
946 : int
947 0 : tap_set_carrier (u32 hw_if_index, u32 carrier_up)
948 : {
949 0 : int ret = 0;
950 : #ifdef TUNSETCARRIER
951 0 : vnet_main_t *vnm = vnet_get_main ();
952 0 : vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
953 0 : virtio_main_t *mm = &virtio_main;
954 : virtio_if_t *vif;
955 : int *fd;
956 :
957 0 : vif = pool_elt_at_index (mm->interfaces, hi->dev_instance);
958 0 : vec_foreach (fd, vif->tap_fds)
959 : {
960 0 : ret = ioctl (*fd, TUNSETCARRIER, &carrier_up);
961 0 : if (ret < 0)
962 : {
963 0 : clib_warning ("ioctl (TUNSETCARRIER) returned %d", ret);
964 0 : break;
965 : }
966 : }
967 0 : if (!ret)
968 0 : vif->host_carrier_up = (carrier_up != 0);
969 : #endif
970 :
971 0 : return ret;
972 : }
973 :
974 : static clib_error_t *
975 559 : tap_mtu_config (vlib_main_t * vm, unformat_input_t * input)
976 : {
977 559 : tap_main_t *tm = &tap_main;
978 :
979 559 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
980 : {
981 0 : if (unformat (input, "host-mtu %d", &tm->host_mtu_size))
982 : ;
983 : else
984 0 : return clib_error_return (0, "unknown input `%U'",
985 : format_unformat_error, input);
986 : }
987 :
988 559 : return 0;
989 : }
990 :
991 : /*
992 : * Set host tap/tun interface speed in Mbps.
993 : */
994 : int
995 0 : tap_set_speed (u32 hw_if_index, u32 speed)
996 : {
997 0 : vnet_main_t *vnm = vnet_get_main ();
998 0 : vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
999 0 : virtio_main_t *mm = &virtio_main;
1000 : virtio_if_t *vif;
1001 0 : int old_netns_fd = -1;
1002 0 : int nfd = -1;
1003 0 : int ctl_fd = -1;
1004 : struct ifreq ifr;
1005 : struct ethtool_cmd ecmd;
1006 0 : int ret = -1;
1007 :
1008 0 : vif = pool_elt_at_index (mm->interfaces, hi->dev_instance);
1009 :
1010 0 : if (vif->net_ns)
1011 : {
1012 0 : old_netns_fd = clib_netns_open (NULL /* self */);
1013 0 : if ((nfd = clib_netns_open (vif->net_ns)) == -1)
1014 : {
1015 0 : clib_warning ("Cannot open netns");
1016 0 : goto done;
1017 : }
1018 0 : if (clib_setns (nfd) == -1)
1019 : {
1020 0 : clib_warning ("Cannot set ns");
1021 0 : goto done;
1022 : }
1023 : }
1024 :
1025 0 : if ((ctl_fd = socket (AF_INET, SOCK_STREAM, 0)) == -1)
1026 : {
1027 0 : clib_warning ("Cannot open control socket");
1028 0 : goto done;
1029 : }
1030 :
1031 0 : ecmd.cmd = ETHTOOL_GSET;
1032 0 : clib_memset (&ifr, 0, sizeof (ifr));
1033 0 : clib_memcpy (ifr.ifr_name, vif->host_if_name,
1034 : strlen ((const char *) vif->host_if_name));
1035 0 : ifr.ifr_data = (void *) &ecmd;
1036 0 : if ((ret = ioctl (ctl_fd, SIOCETHTOOL, &ifr)) < 0)
1037 : {
1038 0 : clib_warning ("Cannot get device settings");
1039 0 : goto done;
1040 : }
1041 :
1042 0 : if (ethtool_cmd_speed (&ecmd) != speed)
1043 : {
1044 0 : ecmd.cmd = ETHTOOL_SSET;
1045 0 : ethtool_cmd_speed_set (&ecmd, speed);
1046 0 : if ((ret = ioctl (ctl_fd, SIOCETHTOOL, &ifr)) < 0)
1047 : {
1048 0 : clib_warning ("Cannot set device settings");
1049 0 : goto done;
1050 : }
1051 : }
1052 :
1053 0 : done:
1054 0 : if (old_netns_fd != -1)
1055 : {
1056 0 : if (clib_setns (old_netns_fd) == -1)
1057 : {
1058 0 : clib_warning ("Cannot set old ns");
1059 : }
1060 0 : close (old_netns_fd);
1061 : }
1062 0 : if (nfd != -1)
1063 0 : close (nfd);
1064 0 : if (ctl_fd != -1)
1065 0 : close (ctl_fd);
1066 :
1067 0 : return ret;
1068 : }
1069 :
1070 : /* tap { host-mtu <size> } configuration. */
1071 7306 : VLIB_CONFIG_FUNCTION (tap_mtu_config, "tap");
1072 :
1073 : static clib_error_t *
1074 559 : tap_init (vlib_main_t * vm)
1075 : {
1076 559 : tap_main_t *tm = &tap_main;
1077 559 : clib_error_t *error = 0;
1078 :
1079 559 : tm->log_default = vlib_log_register_class ("tap", 0);
1080 559 : vlib_log_debug (tm->log_default, "initialized");
1081 :
1082 559 : tm->host_mtu_size = 0;
1083 :
1084 559 : return error;
1085 : }
1086 :
1087 75599 : VLIB_INIT_FUNCTION (tap_init);
1088 :
1089 : /*
1090 : * fd.io coding-style-patch-verification: ON
1091 : *
1092 : * Local Variables:
1093 : * eval: (c-set-style "gnu")
1094 : * End:
1095 : */
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