2 *------------------------------------------------------------------
3 * Copyright (c) 2018 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 *------------------------------------------------------------------
20 #include <sys/ioctl.h>
21 #include <linux/ethtool.h>
22 #include <linux/if_link.h>
23 #include <linux/sockios.h>
24 #include <bpf/libbpf.h>
25 #include <vlib/vlib.h>
26 #include <vlib/unix/unix.h>
27 #include <vlib/pci/pci.h>
28 #include <vppinfra/linux/netns.h>
29 #include <vppinfra/linux/sysfs.h>
30 #include <vppinfra/unix.h>
31 #include <vnet/ethernet/ethernet.h>
32 #include <vnet/interface/rx_queue_funcs.h>
33 #include <vnet/interface/tx_queue_funcs.h>
36 af_xdp_main_t af_xdp_main;
45 gdb_af_xdp_get_prod (const struct xsk_ring_prod *prod)
47 gdb_af_xdp_pair_t pair = { *prod->producer, *prod->consumer };
52 gdb_af_xdp_get_cons (const struct xsk_ring_cons * cons)
54 gdb_af_xdp_pair_t pair = { *cons->producer, *cons->consumer };
59 af_xdp_mac_change (vnet_hw_interface_t * hw, const u8 * old, const u8 * new)
61 af_xdp_main_t *am = &af_xdp_main;
62 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
63 errno_t err = memcpy_s (ad->hwaddr, sizeof (ad->hwaddr), new, 6);
65 return clib_error_return_code (0, -err, CLIB_ERROR_ERRNO_VALID,
71 af_xdp_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw, u32 flags)
73 af_xdp_main_t *am = &af_xdp_main;
74 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
79 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set unicast not supported yet");
81 case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
82 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad,
83 "set promiscuous not supported yet");
85 case ETHERNET_INTERFACE_FLAG_MTU:
86 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set mtu not supported yet");
90 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "unknown flag %x requested", flags);
95 af_xdp_enter_netns (char *netns, int *fds)
97 *fds = *(fds + 1) = -1;
100 *fds = clib_netns_open (NULL /* self */);
101 if ((*(fds + 1) = clib_netns_open ((u8 *) netns)) == -1)
102 return VNET_API_ERROR_SYSCALL_ERROR_8;
103 if (clib_setns (*(fds + 1)) == -1)
104 return VNET_API_ERROR_SYSCALL_ERROR_9;
110 af_xdp_cleanup_netns (int *fds)
115 if (*(fds + 1) != -1)
118 *fds = *(fds + 1) = -1;
122 af_xdp_exit_netns (char *netns, int *fds)
128 ret = clib_setns (*fds);
130 af_xdp_cleanup_netns (fds);
137 af_xdp_delete_if (vlib_main_t * vm, af_xdp_device_t * ad)
139 vnet_main_t *vnm = vnet_get_main ();
140 af_xdp_main_t *axm = &af_xdp_main;
141 struct xsk_socket **xsk;
142 struct xsk_umem **umem;
147 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
148 ethernet_delete_interface (vnm, ad->hw_if_index);
151 for (i = 0; i < ad->txq_num; i++)
152 clib_spinlock_free (&vec_elt (ad->txqs, i).lock);
154 vec_foreach (xsk, ad->xsk)
155 xsk_socket__delete (*xsk);
157 vec_foreach (umem, ad->umem)
158 xsk_umem__delete (*umem);
160 for (i = 0; i < ad->rxq_num; i++)
161 clib_file_del_by_index (&file_main, vec_elt (ad->rxqs, i).file_index);
166 af_xdp_enter_netns (ad->netns, ns_fds);
167 bpf_set_link_xdp_fd (ad->linux_ifindex, -1, 0);
168 af_xdp_exit_netns (ad->netns, ns_fds);
170 bpf_object__unload (ad->bpf_obj);
175 vec_free (ad->buffer_template);
179 vec_free (ad->linux_ifname);
180 vec_free (ad->netns);
181 clib_error_free (ad->error);
182 pool_put (axm->devices, ad);
186 af_xdp_load_program (af_xdp_create_if_args_t * args, af_xdp_device_t * ad)
190 ad->linux_ifindex = if_nametoindex (ad->linux_ifname);
191 if (!ad->linux_ifindex)
193 args->rv = VNET_API_ERROR_INVALID_VALUE;
195 clib_error_return_unix (0, "if_nametoindex(%s) failed",
200 if (bpf_prog_load (args->prog, BPF_PROG_TYPE_XDP, &ad->bpf_obj, &fd))
202 args->rv = VNET_API_ERROR_SYSCALL_ERROR_5;
204 clib_error_return_unix (0, "bpf_prog_load(%s) failed", args->prog);
208 #ifndef XDP_FLAGS_REPLACE
209 #define XDP_FLAGS_REPLACE 0
211 if (bpf_set_link_xdp_fd (ad->linux_ifindex, fd, XDP_FLAGS_REPLACE))
213 args->rv = VNET_API_ERROR_SYSCALL_ERROR_6;
215 clib_error_return_unix (0, "bpf_set_link_xdp_fd(%s) failed",
223 bpf_object__unload (ad->bpf_obj);
226 ad->linux_ifindex = ~0;
231 af_xdp_create_queue (vlib_main_t *vm, af_xdp_create_if_args_t *args,
232 af_xdp_device_t *ad, int qid)
234 struct xsk_umem **umem;
235 struct xsk_socket **xsk;
238 struct xsk_umem_config umem_config;
239 struct xsk_socket_config sock_config;
240 struct xdp_options opt;
242 const int is_rx = qid < ad->rxq_num;
243 const int is_tx = qid < ad->txq_num;
245 umem = vec_elt_at_index (ad->umem, qid);
246 xsk = vec_elt_at_index (ad->xsk, qid);
247 rxq = vec_elt_at_index (ad->rxqs, qid);
248 txq = vec_elt_at_index (ad->txqs, qid);
251 * fq and cq must always be allocated even if unused
252 * whereas rx and tx indicates whether we want rxq, txq, or both
254 struct xsk_ring_cons *rx = is_rx ? &rxq->rx : 0;
255 struct xsk_ring_prod *fq = &rxq->fq;
256 struct xsk_ring_prod *tx = is_tx ? &txq->tx : 0;
257 struct xsk_ring_cons *cq = &txq->cq;
260 memset (&umem_config, 0, sizeof (umem_config));
261 umem_config.fill_size = args->rxq_size;
262 umem_config.comp_size = args->txq_size;
263 umem_config.frame_size =
264 sizeof (vlib_buffer_t) + vlib_buffer_get_default_data_size (vm);
265 umem_config.frame_headroom = sizeof (vlib_buffer_t);
266 umem_config.flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG;
268 (umem, uword_to_pointer (vm->buffer_main->buffer_mem_start, void *),
269 vm->buffer_main->buffer_mem_size, fq, cq, &umem_config))
271 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
272 args->error = clib_error_return_unix (0, "xsk_umem__create() failed");
276 memset (&sock_config, 0, sizeof (sock_config));
277 sock_config.rx_size = args->rxq_size;
278 sock_config.tx_size = args->txq_size;
279 sock_config.bind_flags = XDP_USE_NEED_WAKEUP;
282 case AF_XDP_MODE_AUTO:
284 case AF_XDP_MODE_COPY:
285 sock_config.bind_flags |= XDP_COPY;
287 case AF_XDP_MODE_ZERO_COPY:
288 sock_config.bind_flags |= XDP_ZEROCOPY;
291 if (xsk_socket__create
292 (xsk, ad->linux_ifname, qid, *umem, rx, tx, &sock_config))
294 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
296 clib_error_return_unix (0,
297 "xsk_socket__create() failed (is linux netdev %s up?)",
302 fd = xsk_socket__fd (*xsk);
303 optlen = sizeof (opt);
304 if (getsockopt (fd, SOL_XDP, XDP_OPTIONS, &opt, &optlen))
306 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
308 clib_error_return_unix (0, "getsockopt(XDP_OPTIONS) failed");
311 if (opt.flags & XDP_OPTIONS_ZEROCOPY)
312 ad->flags |= AF_XDP_DEVICE_F_ZEROCOPY;
314 rxq->xsk_fd = is_rx ? fd : -1;
319 clib_spinlock_init (&txq->lock);
320 if (is_rx && (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK))
322 /* This is a shared rx+tx queue and we need to lock before syscalls.
323 * Prior to Linux 5.6 there is a race condition preventing to call
324 * poll() and sendto() concurrently on AF_XDP sockets. This was
325 * fixed with commit 11cc2d21499cabe7e7964389634ed1de3ee91d33
326 * to workaround this issue, we protect the syscalls with a
327 * spinlock. Note that it also prevents to use interrupt mode in
328 * multi workers setup, because in this case the poll() is done in
329 * the framework w/o any possibility to protect it.
331 * https://lore.kernel.org/bpf/BYAPR11MB365382C5DB1E5FCC53242609C1549@BYAPR11MB3653.namprd11.prod.outlook.com/
333 clib_spinlock_init (&rxq->syscall_lock);
334 txq->syscall_lock = rxq->syscall_lock;
345 xsk_socket__delete (*xsk);
347 xsk_umem__delete (*umem);
355 af_xdp_get_numa (const char *ifname)
362 (char *) format (0, "/sys/class/net/%s/device/numa_node%c", ifname, 0);
363 err = clib_sysfs_read (path, "%d", &numa);
367 clib_error_free (err);
373 af_xdp_get_q_count (const char *ifname, int *rxq_num, int *txq_num)
375 struct ethtool_channels ec = { .cmd = ETHTOOL_GCHANNELS };
376 struct ifreq ifr = { .ifr_data = (void *) &ec };
379 *rxq_num = *txq_num = 1;
381 fd = socket (AF_INET, SOCK_DGRAM, 0);
385 snprintf (ifr.ifr_name, sizeof (ifr.ifr_name), "%s", ifname);
386 err = ioctl (fd, SIOCETHTOOL, &ifr);
393 *rxq_num = clib_max (ec.combined_count, ec.rx_count);
394 *txq_num = clib_max (ec.combined_count, ec.tx_count);
397 static clib_error_t *
398 af_xdp_device_rxq_read_ready (clib_file_t * f)
400 vnet_hw_if_rx_queue_set_int_pending (vnet_get_main (), f->private_data);
404 static clib_error_t *
405 af_xdp_device_set_rxq_mode (const af_xdp_device_t *ad, af_xdp_rxq_t *rxq,
406 const af_xdp_rxq_mode_t mode)
408 clib_file_main_t *fm = &file_main;
409 clib_file_update_type_t update;
412 if (rxq->mode == mode)
417 case AF_XDP_RXQ_MODE_POLLING:
418 update = UNIX_FILE_UPDATE_DELETE;
420 case AF_XDP_RXQ_MODE_INTERRUPT:
421 if (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK)
422 return clib_error_create (
423 "kernel workaround incompatible with interrupt mode");
424 update = UNIX_FILE_UPDATE_ADD;
428 return clib_error_create ("unknown rxq mode %i", mode);
431 f = clib_file_get (fm, rxq->file_index);
432 fm->file_update (f, update);
438 af_xdp_find_rxq_for_thread (vnet_main_t *vnm, const af_xdp_device_t *ad,
442 for (i = 0; i < ad->rxq_num; i++)
444 const u32 qid = vec_elt (ad->rxqs, i).queue_index;
445 const u32 tid = vnet_hw_if_get_rx_queue (vnm, qid)->thread_index;
452 static clib_error_t *
453 af_xdp_finalize_queues (vnet_main_t *vnm, af_xdp_device_t *ad,
454 const int n_vlib_mains)
456 clib_error_t *err = 0;
459 for (i = 0; i < ad->rxq_num; i++)
461 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
462 rxq->queue_index = vnet_hw_if_register_rx_queue (
463 vnm, ad->hw_if_index, i, VNET_HW_IF_RXQ_THREAD_ANY);
464 u8 *desc = format (0, "%U rxq %d", format_af_xdp_device_name,
465 ad->dev_instance, i);
467 .file_descriptor = rxq->xsk_fd,
468 .private_data = rxq->queue_index,
469 .read_function = af_xdp_device_rxq_read_ready,
472 rxq->file_index = clib_file_add (&file_main, &f);
473 vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
475 err = af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
480 for (i = 0; i < ad->txq_num; i++)
481 vec_elt (ad->txqs, i).queue_index =
482 vnet_hw_if_register_tx_queue (vnm, ad->hw_if_index, i);
484 /* We set the rxq and txq of the same queue pair on the same thread
485 * by default to avoid locking because of the syscall lock. */
486 int last_qid = clib_min (ad->rxq_num, ad->txq_num - 1);
487 for (i = 0; i < n_vlib_mains; i++)
489 /* search for the 1st rxq assigned on this thread, if any */
490 u32 qid = af_xdp_find_rxq_for_thread (vnm, ad, i);
491 /* if this rxq is combined with a txq, use it. Otherwise, we'll
492 * assign txq in a round-robin fashion. We start from the 1st txq
493 * not shared with a rxq if possible... */
494 qid = qid < ad->txq_num ? qid : (last_qid++ % ad->txq_num);
495 vnet_hw_if_tx_queue_assign_thread (
496 vnm, vec_elt (ad->txqs, qid).queue_index, i);
499 vnet_hw_if_update_runtime_data (vnm, ad->hw_if_index);
504 af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args)
506 vnet_main_t *vnm = vnet_get_main ();
507 vlib_thread_main_t *tm = vlib_get_thread_main ();
508 vnet_eth_interface_registration_t eir = {};
509 af_xdp_main_t *am = &af_xdp_main;
511 vnet_sw_interface_t *sw;
512 int rxq_num, txq_num, q_num;
516 args->rxq_size = args->rxq_size ? args->rxq_size : 2 * VLIB_FRAME_SIZE;
517 args->txq_size = args->txq_size ? args->txq_size : 2 * VLIB_FRAME_SIZE;
518 args->rxq_num = args->rxq_num ? args->rxq_num : 1;
520 if (!args->linux_ifname)
522 args->rv = VNET_API_ERROR_INVALID_VALUE;
523 args->error = clib_error_return (0, "missing host interface");
527 if (args->rxq_size < VLIB_FRAME_SIZE || args->txq_size < VLIB_FRAME_SIZE ||
528 args->rxq_size > 65535 || args->txq_size > 65535 ||
529 !is_pow2 (args->rxq_size) || !is_pow2 (args->txq_size))
531 args->rv = VNET_API_ERROR_INVALID_VALUE;
533 clib_error_return (0,
534 "queue size must be a power of two between %i and 65535",
539 ret = af_xdp_enter_netns (args->netns, ns_fds);
543 args->error = clib_error_return (0, "enter netns %s failed, ret %d",
544 args->netns, args->rv);
548 af_xdp_get_q_count (args->linux_ifname, &rxq_num, &txq_num);
549 if (args->rxq_num > rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num)
551 args->rv = VNET_API_ERROR_INVALID_VALUE;
552 args->error = clib_error_create ("too many rxq requested (%d > %d)",
553 args->rxq_num, rxq_num);
556 rxq_num = clib_min (rxq_num, args->rxq_num);
557 txq_num = clib_min (txq_num, tm->n_vlib_mains);
559 pool_get_zero (am->devices, ad);
561 if (tm->n_vlib_mains > 1 &&
562 0 == (args->flags & AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK))
563 ad->flags |= AF_XDP_DEVICE_F_SYSCALL_LOCK;
565 ad->linux_ifname = (char *) format (0, "%s", args->linux_ifname);
566 vec_validate (ad->linux_ifname, IFNAMSIZ - 1); /* libbpf expects ifname to be at least IFNAMSIZ */
568 ad->netns = (char *) format (0, "%s", args->netns);
570 if (args->prog && af_xdp_load_program (args, ad))
573 q_num = clib_max (rxq_num, txq_num);
574 ad->rxq_num = rxq_num;
575 ad->txq_num = txq_num;
577 vec_validate_aligned (ad->umem, q_num - 1, CLIB_CACHE_LINE_BYTES);
578 vec_validate_aligned (ad->xsk, q_num - 1, CLIB_CACHE_LINE_BYTES);
579 vec_validate_aligned (ad->rxqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
580 vec_validate_aligned (ad->txqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
582 for (i = 0; i < q_num; i++)
584 if (af_xdp_create_queue (vm, args, ad, i))
587 * queue creation failed
588 * it is only a fatal error if we could not create the number of rx
589 * queues requested explicitely by the user and the user did not
591 * we might create less tx queues than workers but this is ok
593 af_xdp_log (VLIB_LOG_LEVEL_DEBUG, ad,
594 "create interface failed to create queue qid=%d", i);
596 /* fixup vectors length */
597 vec_set_len (ad->umem, i);
598 vec_set_len (ad->xsk, i);
599 vec_set_len (ad->rxqs, i);
600 vec_set_len (ad->txqs, i);
602 ad->rxq_num = clib_min (i, rxq_num);
603 ad->txq_num = clib_min (i, txq_num);
606 (i < rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num))
608 ad->rxq_num = ad->txq_num = 0;
609 goto err2; /* failed creating requested rxq: fatal error, bailing
615 clib_error_free (args->error);
620 if (af_xdp_exit_netns (args->netns, ns_fds))
622 args->rv = VNET_API_ERROR_SYSCALL_ERROR_10;
623 args->error = clib_error_return (0, "exit netns failed");
627 ad->dev_instance = ad - am->devices;
628 ad->per_interface_next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
630 vlib_buffer_pool_get_default_for_numa (vm,
635 char *ifname = ad->linux_ifname;
636 if (args->netns != NULL && strncmp (args->netns, "pid:", 4) == 0)
639 (char *) format (0, "%s/%u", ifname, atoi (args->netns + 4));
642 ad->name = (char *) format (0, "%s/%d", ifname, ad->dev_instance);
645 ad->name = (char *) format (0, "%s", args->name);
647 ethernet_mac_address_generate (ad->hwaddr);
649 /* create interface */
650 eir.dev_class_index = af_xdp_device_class.index;
651 eir.dev_instance = ad->dev_instance;
652 eir.address = ad->hwaddr;
653 eir.cb.flag_change = af_xdp_flag_change;
654 ad->hw_if_index = vnet_eth_register_interface (vnm, &eir);
656 sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
657 args->sw_if_index = ad->sw_if_index = sw->sw_if_index;
659 vnet_hw_if_set_caps (vnm, ad->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
661 vnet_hw_if_set_input_node (vnm, ad->hw_if_index, af_xdp_input_node.index);
663 args->error = af_xdp_finalize_queues (vnm, ad, tm->n_vlib_mains);
666 args->rv = VNET_API_ERROR_SYSCALL_ERROR_7;
670 /* buffer template */
671 vec_validate_aligned (ad->buffer_template, 1, CLIB_CACHE_LINE_BYTES);
672 ad->buffer_template->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
673 ad->buffer_template->ref_count = 1;
674 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_RX] = ad->sw_if_index;
675 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_TX] = (u32) ~ 0;
676 ad->buffer_template->buffer_pool_index = ad->pool;
681 af_xdp_delete_if (vm, ad);
683 af_xdp_cleanup_netns (ns_fds);
685 vlib_log_err (am->log_class, "%U", format_clib_error, args->error);
688 static clib_error_t *
689 af_xdp_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
691 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
692 af_xdp_main_t *am = &af_xdp_main;
693 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
694 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
696 if (ad->flags & AF_XDP_DEVICE_F_ERROR)
697 return clib_error_return (0, "device is in error state");
701 vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
702 VNET_HW_INTERFACE_FLAG_LINK_UP);
703 ad->flags |= AF_XDP_DEVICE_F_ADMIN_UP;
704 af_xdp_device_input_refill (ad);
708 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
709 ad->flags &= ~AF_XDP_DEVICE_F_ADMIN_UP;
714 static clib_error_t *
715 af_xdp_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
716 vnet_hw_if_rx_mode mode)
718 af_xdp_main_t *am = &af_xdp_main;
719 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
720 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
721 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
725 default: /* fallthrough */
726 case VNET_HW_IF_RX_MODE_UNKNOWN: /* fallthrough */
727 case VNET_HW_IF_NUM_RX_MODES:
728 return clib_error_create ("uknown rx mode - doing nothing");
729 case VNET_HW_IF_RX_MODE_DEFAULT: /* fallthrough */
730 case VNET_HW_IF_RX_MODE_POLLING:
731 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
732 case VNET_HW_IF_RX_MODE_INTERRUPT: /* fallthrough */
733 case VNET_HW_IF_RX_MODE_ADAPTIVE:
734 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_INTERRUPT);
737 ASSERT (0 && "unreachable");
738 return clib_error_create ("unreachable");
742 af_xdp_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
745 af_xdp_main_t *am = &af_xdp_main;
746 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
747 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
749 /* Shut off redirection */
750 if (node_index == ~0)
752 ad->per_interface_next_index = node_index;
756 ad->per_interface_next_index =
757 vlib_node_add_next (vlib_get_main (), af_xdp_input_node.index,
761 static char *af_xdp_tx_func_error_strings[] = {
763 foreach_af_xdp_tx_func_error
768 af_xdp_clear (u32 dev_instance)
770 af_xdp_main_t *am = &af_xdp_main;
771 af_xdp_device_t *ad = pool_elt_at_index (am->devices, dev_instance);
772 clib_error_free (ad->error);
776 VNET_DEVICE_CLASS (af_xdp_device_class) = {
777 .name = "AF_XDP interface",
778 .format_device = format_af_xdp_device,
779 .format_device_name = format_af_xdp_device_name,
780 .admin_up_down_function = af_xdp_interface_admin_up_down,
781 .rx_mode_change_function = af_xdp_interface_rx_mode_change,
782 .rx_redirect_to_node = af_xdp_set_interface_next_node,
783 .tx_function_n_errors = AF_XDP_TX_N_ERROR,
784 .tx_function_error_strings = af_xdp_tx_func_error_strings,
785 .mac_addr_change_function = af_xdp_mac_change,
786 .clear_counters = af_xdp_clear,
791 af_xdp_init (vlib_main_t * vm)
793 af_xdp_main_t *am = &af_xdp_main;
795 am->log_class = vlib_log_register_class ("af_xdp", 0);
800 VLIB_INIT_FUNCTION (af_xdp_init);
803 * fd.io coding-style-patch-verification: ON
806 * eval: (c-set-style "gnu")