2 *------------------------------------------------------------------
3 * af_packet.c - linux kernel packet interface
5 * Copyright (c) 2016 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #include <linux/if_ether.h>
21 #include <linux/if_packet.h>
22 #include <sys/ioctl.h>
26 #include <sys/types.h>
29 #include <vppinfra/linux/sysfs.h>
30 #include <vlib/vlib.h>
31 #include <vlib/unix/unix.h>
32 #include <vnet/ip/ip.h>
33 #include <vnet/devices/netlink.h>
34 #include <vnet/ethernet/ethernet.h>
35 #include <vnet/interface/rx_queue_funcs.h>
36 #include <vnet/interface/tx_queue_funcs.h>
38 #include <vnet/devices/af_packet/af_packet.h>
40 af_packet_main_t af_packet_main;
42 VNET_HW_INTERFACE_CLASS (af_packet_ip_device_hw_interface_class, static) = {
43 .name = "af-packet-ip-device",
44 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
47 #define AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK 1024
48 #define AF_PACKET_DEFAULT_TX_FRAME_SIZE (2048 * 33) // GSO packet of 64KB
49 #define AF_PACKET_TX_BLOCK_NR 1
51 #define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK 32
52 #define AF_PACKET_DEFAULT_RX_FRAME_SIZE 2048
53 #define AF_PACKET_RX_BLOCK_NR 160
55 /*defined in net/if.h but clashes with dpdk headers */
56 unsigned int if_nametoindex (const char *ifname);
59 af_packet_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
62 clib_error_t *error, *rv;
63 af_packet_main_t *apm = &af_packet_main;
64 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, hi->dev_instance);
66 error = vnet_netlink_set_link_mtu (apif->host_if_index,
67 frame_size + hi->frame_overhead);
71 vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
72 format_clib_error, error);
73 rv = vnet_error (VNET_ERR_SYSCALL_ERROR_1, "netlink error: %U",
74 format_clib_error, error);
75 clib_error_free (error);
79 apif->host_mtu = frame_size + hi->frame_overhead;
84 af_packet_read_mtu (af_packet_if_t *apif)
86 af_packet_main_t *apm = &af_packet_main;
88 error = vnet_netlink_get_link_mtu (apif->host_if_index, &apif->host_mtu);
91 vlib_log_err (apm->log_class, "netlink failed to get MTU: %U",
92 format_clib_error, error);
93 clib_error_free (error);
94 return VNET_API_ERROR_SYSCALL_ERROR_1;
100 af_packet_fd_read_ready (clib_file_t * uf)
102 vnet_main_t *vnm = vnet_get_main ();
104 /* Schedule the rx node */
105 vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
110 is_bridge (const u8 * host_if_name)
115 s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
116 dir = opendir ((char *) s);
129 af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
131 vnet_main_t *vnm = vnet_get_main ();
132 af_packet_queue_t *rx_queue;
134 vnet_hw_if_set_input_node (vnm, apif->hw_if_index,
135 af_packet_input_node.index);
137 vec_foreach (rx_queue, apif->rx_queues)
139 rx_queue->queue_index = vnet_hw_if_register_rx_queue (
140 vnm, apif->hw_if_index, rx_queue->queue_id, VNET_HW_IF_RXQ_THREAD_ANY);
143 clib_file_t template = { 0 };
144 template.read_function = af_packet_fd_read_ready;
145 template.file_descriptor = rx_queue->fd;
146 template.private_data = rx_queue->queue_index;
147 template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
148 template.description =
149 format (0, "%U queue %u", format_af_packet_device_name,
150 apif->dev_instance, rx_queue->queue_id);
151 rx_queue->clib_file_index = clib_file_add (&file_main, &template);
153 vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
154 rx_queue->clib_file_index);
155 vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
156 VNET_HW_IF_RX_MODE_INTERRUPT);
157 rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
159 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
163 af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
165 vnet_main_t *vnm = vnet_get_main ();
166 af_packet_main_t *apm = &af_packet_main;
167 af_packet_queue_t *tx_queue;
169 vec_foreach (tx_queue, apif->tx_queues)
171 tx_queue->queue_index = vnet_hw_if_register_tx_queue (
172 vnm, apif->hw_if_index, tx_queue->queue_id);
175 if (apif->num_txqs == 0)
177 vlib_log_err (apm->log_class, "Interface %U has 0 txq",
178 format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
182 for (u32 j = 0; j < vlib_get_n_threads (); j++)
184 u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
185 vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
188 vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
192 create_packet_v3_sock (int host_if_index, tpacket_req3_t *rx_req,
193 tpacket_req3_t *tx_req, int *fd, af_packet_ring_t *ring,
194 u8 *is_cksum_gso_enabled, u32 fanout_id, u8 is_fanout)
196 af_packet_main_t *apm = &af_packet_main;
197 struct sockaddr_ll sll;
198 socklen_t req_sz = sizeof (tpacket_req3_t);
200 int ver = TPACKET_V3;
204 ring_sz += rx_req->tp_block_size * rx_req->tp_block_nr;
207 ring_sz += tx_req->tp_block_size * tx_req->tp_block_nr;
209 if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
211 vlib_log_err (apm->log_class,
212 "Failed to create AF_PACKET socket: %s (errno %d)",
213 strerror (errno), errno);
214 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
218 /* bind before rx ring is cfged so we don't receive packets from other interfaces */
219 clib_memset (&sll, 0, sizeof (sll));
220 sll.sll_family = PF_PACKET;
221 sll.sll_protocol = htons (ETH_P_ALL);
222 sll.sll_ifindex = host_if_index;
223 if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
225 vlib_log_err (apm->log_class,
226 "Failed to bind rx packet socket: %s (errno %d)",
227 strerror (errno), errno);
228 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
232 if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
234 vlib_log_err (apm->log_class,
235 "Failed to set rx packet interface version: %s (errno %d)",
236 strerror (errno), errno);
237 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
242 if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
246 "Failed to set packet tx ring error handling option: %s (errno %d)",
247 strerror (errno), errno);
248 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
253 if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) < 0)
257 "Failed to set packet vnet hdr error handling option: %s (errno %d)",
258 strerror (errno), errno);
261 *is_cksum_gso_enabled = 1;
263 #if defined(PACKET_QDISC_BYPASS)
264 /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
265 if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
268 vlib_log_debug (apm->log_class,
269 "Failed to set qdisc bypass error "
270 "handling option: %s (errno %d)",
271 strerror (errno), errno);
277 int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
278 if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
279 sizeof (fanout)) < 0)
281 vlib_log_err (apm->log_class,
282 "Failed to set fanout options: %s (errno %d)",
283 strerror (errno), errno);
284 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
290 if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
292 vlib_log_err (apm->log_class,
293 "Failed to set packet rx ring options: %s (errno %d)",
294 strerror (errno), errno);
295 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
300 if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
302 vlib_log_err (apm->log_class,
303 "Failed to set packet tx ring options: %s (errno %d)",
304 strerror (errno), errno);
305 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
309 ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
310 MAP_SHARED | MAP_LOCKED, *fd, 0);
311 if (ring->ring_start_addr == MAP_FAILED)
313 vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
314 strerror (errno), errno);
315 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
319 ring->ring_size = ring_sz;
332 af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
333 af_packet_create_if_arg_t *arg,
334 af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
335 u8 queue_id, u8 is_fanout)
337 af_packet_main_t *apm = &af_packet_main;
338 tpacket_req3_t *rx_req = 0;
339 tpacket_req3_t *tx_req = 0;
341 af_packet_ring_t ring = { 0 };
343 u32 rx_frames_per_block, tx_frames_per_block;
344 u32 rx_frame_size, tx_frame_size;
346 u8 is_cksum_gso_enabled = 0;
350 rx_frames_per_block = arg->rx_frames_per_block ?
351 arg->rx_frames_per_block :
352 AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK;
354 rx_frame_size = arg->rx_frame_size ? arg->rx_frame_size :
355 AF_PACKET_DEFAULT_RX_FRAME_SIZE;
356 vec_validate (rx_queue->rx_req, 0);
357 rx_queue->rx_req->tp_block_size = rx_frame_size * rx_frames_per_block;
358 rx_queue->rx_req->tp_frame_size = rx_frame_size;
359 rx_queue->rx_req->tp_block_nr = AF_PACKET_RX_BLOCK_NR;
360 rx_queue->rx_req->tp_frame_nr =
361 AF_PACKET_RX_BLOCK_NR * rx_frames_per_block;
362 rx_queue->rx_req->tp_retire_blk_tov = 1; // 1 ms block timout
363 rx_queue->rx_req->tp_feature_req_word = 0;
364 rx_queue->rx_req->tp_sizeof_priv = 0;
365 rx_req = rx_queue->rx_req;
370 tx_frames_per_block = arg->tx_frames_per_block ?
371 arg->tx_frames_per_block :
372 AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
373 tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
374 AF_PACKET_DEFAULT_TX_FRAME_SIZE;
376 vec_validate (tx_queue->tx_req, 0);
377 tx_queue->tx_req->tp_block_size = tx_frame_size * tx_frames_per_block;
378 tx_queue->tx_req->tp_frame_size = tx_frame_size;
379 tx_queue->tx_req->tp_block_nr = AF_PACKET_TX_BLOCK_NR;
380 tx_queue->tx_req->tp_frame_nr =
381 AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
382 tx_queue->tx_req->tp_retire_blk_tov = 0;
383 tx_queue->tx_req->tp_sizeof_priv = 0;
384 tx_queue->tx_req->tp_feature_req_word = 0;
385 tx_req = tx_queue->tx_req;
388 if (rx_queue || tx_queue)
390 ret = create_packet_v3_sock (apif->host_if_index, rx_req, tx_req, &fd,
391 &ring, &is_cksum_gso_enabled,
392 apif->dev_instance, is_fanout);
397 vec_add1 (apif->rings, ring);
398 ring_addr = ring.ring_start_addr;
404 vec_validate (rx_queue->rx_ring, rx_queue->rx_req->tp_block_nr - 1);
405 vec_foreach_index (i, rx_queue->rx_ring)
407 rx_queue->rx_ring[i] =
408 ring_addr + i * rx_queue->rx_req->tp_block_size;
411 rx_queue->next_rx_block = 0;
412 rx_queue->queue_id = queue_id;
413 rx_queue->is_rx_pending = 0;
414 ring_addr = ring_addr + rx_queue->rx_req->tp_block_size *
415 rx_queue->rx_req->tp_block_nr;
421 vec_validate (tx_queue->tx_ring, tx_queue->tx_req->tp_block_nr - 1);
422 vec_foreach_index (i, tx_queue->tx_ring)
424 tx_queue->tx_ring[i] =
425 ring_addr + i * tx_queue->tx_req->tp_block_size;
428 tx_queue->next_tx_frame = 0;
429 tx_queue->queue_id = queue_id;
430 clib_spinlock_init (&tx_queue->lockp);
434 apif->is_cksum_gso_enabled = is_cksum_gso_enabled;
438 vlib_log_err (apm->log_class, "Failed to set queue %u error", queue_id);
440 vec_free (rx_queue->rx_req);
442 vec_free (tx_queue->tx_req);
447 af_packet_device_init (vlib_main_t *vm, af_packet_if_t *apif,
448 af_packet_create_if_arg_t *args)
450 af_packet_main_t *apm = &af_packet_main;
451 af_packet_queue_t *rx_queue = 0;
452 af_packet_queue_t *tx_queue = 0;
453 u16 nq = clib_min (args->num_rxqs, args->num_txqs);
456 u8 is_fanout = (args->num_rxqs > 1) ? 1 : 0;
458 vec_validate (apif->rx_queues, args->num_rxqs - 1);
459 vec_validate (apif->tx_queues, args->num_txqs - 1);
463 rx_queue = vec_elt_at_index (apif->rx_queues, i);
464 tx_queue = vec_elt_at_index (apif->tx_queues, i);
465 ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i,
471 if (args->num_rxqs > args->num_txqs)
473 for (; i < args->num_rxqs; i++)
475 rx_queue = vec_elt_at_index (apif->rx_queues, i);
477 af_packet_queue_init (vm, apif, args, rx_queue, 0, i, is_fanout);
482 else if (args->num_txqs > args->num_rxqs)
484 for (; i < args->num_txqs; i++)
486 tx_queue = vec_elt_at_index (apif->tx_queues, i);
487 ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i, 0);
493 apif->num_rxqs = args->num_rxqs;
494 apif->num_txqs = args->num_txqs;
498 vlib_log_err (apm->log_class, "Failed to init device error");
503 af_packet_create_if (af_packet_create_if_arg_t *arg)
505 af_packet_main_t *apm = &af_packet_main;
506 vlib_main_t *vm = vlib_get_main ();
509 af_packet_if_t *apif = 0;
511 vnet_sw_interface_t *sw;
512 vnet_main_t *vnm = vnet_get_main ();
513 vnet_hw_if_caps_t caps = VNET_HW_IF_CAP_INT_MODE;
516 u8 *host_if_name_dup = 0;
517 int host_if_index = -1;
520 p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
523 apif = vec_elt_at_index (apm->interfaces, p[0]);
524 arg->sw_if_index = apif->sw_if_index;
525 return VNET_API_ERROR_IF_ALREADY_EXISTS;
528 host_if_name_dup = vec_dup (arg->host_if_name);
531 * make sure host side of interface is 'UP' before binding AF_PACKET
534 if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
536 vlib_log_debug (apm->log_class,
537 "Failed to create AF_UNIX socket: %s (errno %d)",
538 strerror (errno), errno);
539 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
543 clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
544 vec_len (arg->host_if_name));
545 if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
549 "Failed to retrieve the interface (%s) index: %s (errno %d)",
550 arg->host_if_name, strerror (errno), errno);
551 ret = VNET_API_ERROR_INVALID_INTERFACE;
555 host_if_index = ifr.ifr_ifindex;
556 if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
558 vlib_log_debug (apm->log_class,
559 "Failed to get the active flag: %s (errno %d)",
560 strerror (errno), errno);
561 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
565 if (!(ifr.ifr_flags & IFF_UP))
567 ifr.ifr_flags |= IFF_UP;
568 if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
570 vlib_log_debug (apm->log_class,
571 "Failed to set the active flag: %s (errno %d)",
572 strerror (errno), errno);
573 ret = VNET_API_ERROR_SYSCALL_ERROR_1;
584 ret = is_bridge (arg->host_if_name);
585 if (ret == 0) /* is a bridge, ignore state */
588 /* So far everything looks good, let's create interface */
589 pool_get (apm->interfaces, apif);
590 if_index = apif - apm->interfaces;
592 apif->dev_instance = if_index;
593 apif->host_if_index = host_if_index;
594 apif->host_if_name = host_if_name_dup;
595 apif->per_interface_next_index = ~0;
596 apif->mode = arg->mode;
598 ret = af_packet_device_init (vm, apif, arg);
602 ret = af_packet_read_mtu (apif);
607 if (apif->mode != AF_PACKET_IF_MODE_IP)
609 vnet_eth_interface_registration_t eir = {};
610 /*use configured or generate random MAC address */
612 clib_memcpy (hw_addr, arg->hw_addr, 6);
615 f64 now = vlib_time_now (vm);
617 rnd = (u32) (now * 1e6);
618 rnd = random_u32 (&rnd);
620 clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
625 eir.dev_class_index = af_packet_device_class.index;
626 eir.dev_instance = apif->dev_instance;
627 eir.address = hw_addr;
628 eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
629 apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
633 apif->hw_if_index = vnet_register_interface (
634 vnm, af_packet_device_class.index, apif->dev_instance,
635 af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
638 sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
639 apif->sw_if_index = sw->sw_if_index;
641 af_packet_set_rx_queues (vm, apif);
642 af_packet_set_tx_queues (vm, apif);
644 if (apif->is_cksum_gso_enabled)
645 caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
646 VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
648 vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
649 vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
650 VNET_HW_INTERFACE_FLAG_LINK_UP);
652 mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
654 arg->sw_if_index = apif->sw_if_index;
664 vec_free (host_if_name_dup);
665 memset (apif, 0, sizeof (*apif));
666 pool_put (apm->interfaces, apif);
671 af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
673 clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
674 close (rx_queue->fd);
676 rx_queue->rx_ring = NULL;
677 vec_free (rx_queue->rx_req);
678 rx_queue->rx_req = NULL;
683 af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
685 close (tx_queue->fd);
687 clib_spinlock_free (&tx_queue->lockp);
688 tx_queue->tx_ring = NULL;
689 vec_free (tx_queue->tx_req);
690 tx_queue->tx_req = NULL;
695 af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
697 af_packet_main_t *apm = &af_packet_main;
701 // FIXME: unmap the memory
702 if (munmap (ring->ring_start_addr, ring->ring_size))
703 vlib_log_warn (apm->log_class,
704 "Host interface %s could not free ring %p of size %u",
705 apif->host_if_name, ring->ring_start_addr,
708 ring->ring_start_addr = 0;
715 af_packet_delete_if (u8 *host_if_name)
717 vnet_main_t *vnm = vnet_get_main ();
718 af_packet_main_t *apm = &af_packet_main;
719 af_packet_if_t *apif;
720 af_packet_queue_t *rx_queue;
721 af_packet_queue_t *tx_queue;
722 af_packet_ring_t *ring;
725 p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
728 vlib_log_warn (apm->log_class, "Host interface %s does not exist",
730 return VNET_API_ERROR_SYSCALL_ERROR_1;
732 apif = pool_elt_at_index (apm->interfaces, p[0]);
734 /* bring down the interface */
735 vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
738 vec_foreach (rx_queue, apif->rx_queues)
739 af_packet_rx_queue_free (apif, rx_queue);
740 vec_foreach (tx_queue, apif->tx_queues)
741 af_packet_tx_queue_free (apif, tx_queue);
742 vec_foreach (ring, apif->rings)
743 af_packet_ring_free (apif, ring);
745 vec_free (apif->rx_queues);
746 apif->rx_queues = NULL;
747 vec_free (apif->tx_queues);
748 apif->tx_queues = NULL;
749 vec_free (apif->rings);
752 vec_free (apif->host_if_name);
753 apif->host_if_name = NULL;
754 apif->host_if_index = -1;
756 mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
758 if (apif->mode != AF_PACKET_IF_MODE_IP)
759 ethernet_delete_interface (vnm, apif->hw_if_index);
761 vnet_delete_hw_interface (vnm, apif->hw_if_index);
763 memset (apif, 0, sizeof (*apif));
764 pool_put (apm->interfaces, apif);
770 af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
777 af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
779 af_packet_main_t *apm = &af_packet_main;
780 af_packet_if_t *apif;
781 af_packet_if_detail_t *r_af_packet_ifs = NULL;
782 af_packet_if_detail_t *af_packet_if = NULL;
784 pool_foreach (apif, apm->interfaces)
786 vec_add2 (r_af_packet_ifs, af_packet_if, 1);
787 af_packet_if->sw_if_index = apif->sw_if_index;
788 if (apif->host_if_name)
790 clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
791 MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
792 strlen ((const char *) apif->host_if_name)));
796 *out_af_packet_ifs = r_af_packet_ifs;
801 static clib_error_t *
802 af_packet_init (vlib_main_t * vm)
804 af_packet_main_t *apm = &af_packet_main;
805 vlib_thread_main_t *tm = vlib_get_thread_main ();
807 clib_memset (apm, 0, sizeof (af_packet_main_t));
809 mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
811 vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
812 CLIB_CACHE_LINE_BYTES);
814 apm->log_class = vlib_log_register_class ("af_packet", 0);
815 vlib_log_debug (apm->log_class, "initialized");
820 VLIB_INIT_FUNCTION (af_packet_init);
823 * fd.io coding-style-patch-verification: ON
826 * eval: (c-set-style "gnu")