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_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hw,
74 af_xdp_main_t *am = &af_xdp_main;
75 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
76 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set mtu not supported yet");
77 return vnet_error (VNET_ERR_UNSUPPORTED, 0);
81 af_xdp_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw, u32 flags)
83 af_xdp_main_t *am = &af_xdp_main;
84 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
89 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set unicast not supported yet");
91 case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
92 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad,
93 "set promiscuous not supported yet");
97 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "unknown flag %x requested", flags);
102 af_xdp_enter_netns (char *netns, int *fds)
104 *fds = *(fds + 1) = -1;
107 *fds = clib_netns_open (NULL /* self */);
108 if ((*(fds + 1) = clib_netns_open ((u8 *) netns)) == -1)
109 return VNET_API_ERROR_SYSCALL_ERROR_8;
110 if (clib_setns (*(fds + 1)) == -1)
111 return VNET_API_ERROR_SYSCALL_ERROR_9;
117 af_xdp_cleanup_netns (int *fds)
122 if (*(fds + 1) != -1)
125 *fds = *(fds + 1) = -1;
129 af_xdp_exit_netns (char *netns, int *fds)
135 ret = clib_setns (*fds);
137 af_xdp_cleanup_netns (fds);
144 af_xdp_delete_if (vlib_main_t * vm, af_xdp_device_t * ad)
146 vnet_main_t *vnm = vnet_get_main ();
147 af_xdp_main_t *axm = &af_xdp_main;
148 struct xsk_socket **xsk;
149 struct xsk_umem **umem;
154 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
155 ethernet_delete_interface (vnm, ad->hw_if_index);
158 for (i = 0; i < ad->txq_num; i++)
159 clib_spinlock_free (&vec_elt (ad->txqs, i).lock);
161 vec_foreach (xsk, ad->xsk)
162 xsk_socket__delete (*xsk);
164 vec_foreach (umem, ad->umem)
165 xsk_umem__delete (*umem);
167 for (i = 0; i < ad->rxq_num; i++)
168 clib_file_del_by_index (&file_main, vec_elt (ad->rxqs, i).file_index);
173 af_xdp_enter_netns (ad->netns, ns_fds);
174 bpf_set_link_xdp_fd (ad->linux_ifindex, -1, 0);
175 af_xdp_exit_netns (ad->netns, ns_fds);
177 bpf_object__unload (ad->bpf_obj);
182 vec_free (ad->buffer_template);
186 vec_free (ad->linux_ifname);
187 vec_free (ad->netns);
188 clib_error_free (ad->error);
189 pool_put (axm->devices, ad);
193 af_xdp_load_program (af_xdp_create_if_args_t * args, af_xdp_device_t * ad)
197 ad->linux_ifindex = if_nametoindex (ad->linux_ifname);
198 if (!ad->linux_ifindex)
200 args->rv = VNET_API_ERROR_INVALID_VALUE;
202 clib_error_return_unix (0, "if_nametoindex(%s) failed",
207 if (bpf_prog_load (args->prog, BPF_PROG_TYPE_XDP, &ad->bpf_obj, &fd))
209 args->rv = VNET_API_ERROR_SYSCALL_ERROR_5;
211 clib_error_return_unix (0, "bpf_prog_load(%s) failed", args->prog);
215 if (bpf_set_link_xdp_fd (ad->linux_ifindex, fd, 0))
217 args->rv = VNET_API_ERROR_SYSCALL_ERROR_6;
219 clib_error_return_unix (0, "bpf_set_link_xdp_fd(%s) failed",
227 bpf_object__unload (ad->bpf_obj);
230 ad->linux_ifindex = ~0;
235 af_xdp_create_queue (vlib_main_t *vm, af_xdp_create_if_args_t *args,
236 af_xdp_device_t *ad, int qid)
238 struct xsk_umem **umem;
239 struct xsk_socket **xsk;
242 struct xsk_umem_config umem_config;
243 struct xsk_socket_config sock_config;
244 struct xdp_options opt;
246 const int is_rx = qid < ad->rxq_num;
247 const int is_tx = qid < ad->txq_num;
249 umem = vec_elt_at_index (ad->umem, qid);
250 xsk = vec_elt_at_index (ad->xsk, qid);
251 rxq = vec_elt_at_index (ad->rxqs, qid);
252 txq = vec_elt_at_index (ad->txqs, qid);
255 * fq and cq must always be allocated even if unused
256 * whereas rx and tx indicates whether we want rxq, txq, or both
258 struct xsk_ring_cons *rx = is_rx ? &rxq->rx : 0;
259 struct xsk_ring_prod *fq = &rxq->fq;
260 struct xsk_ring_prod *tx = is_tx ? &txq->tx : 0;
261 struct xsk_ring_cons *cq = &txq->cq;
264 memset (&umem_config, 0, sizeof (umem_config));
265 umem_config.fill_size = args->rxq_size;
266 umem_config.comp_size = args->txq_size;
267 umem_config.frame_size =
268 sizeof (vlib_buffer_t) + vlib_buffer_get_default_data_size (vm);
269 umem_config.frame_headroom = sizeof (vlib_buffer_t);
270 umem_config.flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG;
272 (umem, uword_to_pointer (vm->buffer_main->buffer_mem_start, void *),
273 vm->buffer_main->buffer_mem_size, fq, cq, &umem_config))
275 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
276 args->error = clib_error_return_unix (0, "xsk_umem__create() failed");
280 memset (&sock_config, 0, sizeof (sock_config));
281 sock_config.rx_size = args->rxq_size;
282 sock_config.tx_size = args->txq_size;
283 sock_config.bind_flags = XDP_USE_NEED_WAKEUP;
286 case AF_XDP_MODE_AUTO:
288 case AF_XDP_MODE_COPY:
289 sock_config.bind_flags |= XDP_COPY;
291 case AF_XDP_MODE_ZERO_COPY:
292 sock_config.bind_flags |= XDP_ZEROCOPY;
295 if (xsk_socket__create
296 (xsk, ad->linux_ifname, qid, *umem, rx, tx, &sock_config))
298 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
300 clib_error_return_unix (0,
301 "xsk_socket__create() failed (is linux netdev %s up?)",
306 fd = xsk_socket__fd (*xsk);
307 optlen = sizeof (opt);
308 if (getsockopt (fd, SOL_XDP, XDP_OPTIONS, &opt, &optlen))
310 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
312 clib_error_return_unix (0, "getsockopt(XDP_OPTIONS) failed");
315 if (opt.flags & XDP_OPTIONS_ZEROCOPY)
316 ad->flags |= AF_XDP_DEVICE_F_ZEROCOPY;
318 rxq->xsk_fd = is_rx ? fd : -1;
323 clib_spinlock_init (&txq->lock);
324 if (is_rx && (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK))
326 /* This is a shared rx+tx queue and we need to lock before syscalls.
327 * Prior to Linux 5.6 there is a race condition preventing to call
328 * poll() and sendto() concurrently on AF_XDP sockets. This was
329 * fixed with commit 11cc2d21499cabe7e7964389634ed1de3ee91d33
330 * to workaround this issue, we protect the syscalls with a
331 * spinlock. Note that it also prevents to use interrupt mode in
332 * multi workers setup, because in this case the poll() is done in
333 * the framework w/o any possibility to protect it.
335 * https://lore.kernel.org/bpf/BYAPR11MB365382C5DB1E5FCC53242609C1549@BYAPR11MB3653.namprd11.prod.outlook.com/
337 clib_spinlock_init (&rxq->syscall_lock);
338 txq->syscall_lock = rxq->syscall_lock;
349 xsk_socket__delete (*xsk);
351 xsk_umem__delete (*umem);
359 af_xdp_get_numa (const char *ifname)
366 (char *) format (0, "/sys/class/net/%s/device/numa_node%c", ifname, 0);
367 err = clib_sysfs_read (path, "%d", &numa);
371 clib_error_free (err);
377 af_xdp_get_q_count (const char *ifname, int *rxq_num, int *txq_num)
379 struct ethtool_channels ec = { .cmd = ETHTOOL_GCHANNELS };
380 struct ifreq ifr = { .ifr_data = (void *) &ec };
383 *rxq_num = *txq_num = 1;
385 fd = socket (AF_INET, SOCK_DGRAM, 0);
389 snprintf (ifr.ifr_name, sizeof (ifr.ifr_name), "%s", ifname);
390 err = ioctl (fd, SIOCETHTOOL, &ifr);
397 *rxq_num = clib_max (ec.combined_count, ec.rx_count);
398 *txq_num = clib_max (ec.combined_count, ec.tx_count);
401 static clib_error_t *
402 af_xdp_device_rxq_read_ready (clib_file_t * f)
404 vnet_hw_if_rx_queue_set_int_pending (vnet_get_main (), f->private_data);
408 static clib_error_t *
409 af_xdp_device_set_rxq_mode (const af_xdp_device_t *ad, af_xdp_rxq_t *rxq,
410 const af_xdp_rxq_mode_t mode)
412 clib_file_main_t *fm = &file_main;
413 clib_file_update_type_t update;
416 if (rxq->mode == mode)
421 case AF_XDP_RXQ_MODE_POLLING:
422 update = UNIX_FILE_UPDATE_DELETE;
424 case AF_XDP_RXQ_MODE_INTERRUPT:
425 if (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK)
426 return clib_error_create (
427 "kernel workaround incompatible with interrupt mode");
428 update = UNIX_FILE_UPDATE_ADD;
432 return clib_error_create ("unknown rxq mode %i", mode);
435 f = clib_file_get (fm, rxq->file_index);
436 fm->file_update (f, update);
442 af_xdp_find_rxq_for_thread (vnet_main_t *vnm, const af_xdp_device_t *ad,
446 for (i = 0; i < ad->rxq_num; i++)
448 const u32 qid = vec_elt (ad->rxqs, i).queue_index;
449 const u32 tid = vnet_hw_if_get_rx_queue (vnm, qid)->thread_index;
456 static clib_error_t *
457 af_xdp_finalize_queues (vnet_main_t *vnm, af_xdp_device_t *ad,
458 const int n_vlib_mains)
460 clib_error_t *err = 0;
463 for (i = 0; i < ad->rxq_num; i++)
465 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
466 rxq->queue_index = vnet_hw_if_register_rx_queue (
467 vnm, ad->hw_if_index, i, VNET_HW_IF_RXQ_THREAD_ANY);
468 u8 *desc = format (0, "%U rxq %d", format_af_xdp_device_name,
469 ad->dev_instance, i);
471 .file_descriptor = rxq->xsk_fd,
472 .private_data = rxq->queue_index,
473 .read_function = af_xdp_device_rxq_read_ready,
476 rxq->file_index = clib_file_add (&file_main, &f);
477 vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
479 err = af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
484 for (i = 0; i < ad->txq_num; i++)
485 vec_elt (ad->txqs, i).queue_index =
486 vnet_hw_if_register_tx_queue (vnm, ad->hw_if_index, i);
488 /* We set the rxq and txq of the same queue pair on the same thread
489 * by default to avoid locking because of the syscall lock. */
490 int last_qid = clib_min (ad->rxq_num, ad->txq_num - 1);
491 for (i = 0; i < n_vlib_mains; i++)
493 /* search for the 1st rxq assigned on this thread, if any */
494 u32 qid = af_xdp_find_rxq_for_thread (vnm, ad, i);
495 /* if this rxq is combined with a txq, use it. Otherwise, we'll
496 * assign txq in a round-robin fashion. We start from the 1st txq
497 * not shared with a rxq if possible... */
498 qid = qid < ad->txq_num ? qid : (last_qid++ % ad->txq_num);
499 vnet_hw_if_tx_queue_assign_thread (
500 vnm, vec_elt (ad->txqs, qid).queue_index, i);
503 vnet_hw_if_update_runtime_data (vnm, ad->hw_if_index);
508 af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args)
510 vnet_main_t *vnm = vnet_get_main ();
511 vlib_thread_main_t *tm = vlib_get_thread_main ();
512 vnet_eth_interface_registration_t eir = {};
513 af_xdp_main_t *am = &af_xdp_main;
515 vnet_sw_interface_t *sw;
516 int rxq_num, txq_num, q_num;
520 args->rxq_size = args->rxq_size ? args->rxq_size : 2 * VLIB_FRAME_SIZE;
521 args->txq_size = args->txq_size ? args->txq_size : 2 * VLIB_FRAME_SIZE;
522 args->rxq_num = args->rxq_num ? args->rxq_num : 1;
524 if (!args->linux_ifname)
526 args->rv = VNET_API_ERROR_INVALID_VALUE;
527 args->error = clib_error_return (0, "missing host interface");
531 if (args->rxq_size < VLIB_FRAME_SIZE || args->txq_size < VLIB_FRAME_SIZE ||
532 args->rxq_size > 65535 || args->txq_size > 65535 ||
533 !is_pow2 (args->rxq_size) || !is_pow2 (args->txq_size))
535 args->rv = VNET_API_ERROR_INVALID_VALUE;
537 clib_error_return (0,
538 "queue size must be a power of two between %i and 65535",
543 ret = af_xdp_enter_netns (args->netns, ns_fds);
547 args->error = clib_error_return (0, "enter netns %s failed, ret %d",
548 args->netns, args->rv);
552 af_xdp_get_q_count (args->linux_ifname, &rxq_num, &txq_num);
553 if (args->rxq_num > rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num)
555 args->rv = VNET_API_ERROR_INVALID_VALUE;
556 args->error = clib_error_create ("too many rxq requested (%d > %d)",
557 args->rxq_num, rxq_num);
560 rxq_num = clib_min (rxq_num, args->rxq_num);
561 txq_num = clib_min (txq_num, tm->n_vlib_mains);
563 pool_get_zero (am->devices, ad);
565 if (tm->n_vlib_mains > 1 &&
566 0 == (args->flags & AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK))
567 ad->flags |= AF_XDP_DEVICE_F_SYSCALL_LOCK;
569 ad->linux_ifname = (char *) format (0, "%s", args->linux_ifname);
570 vec_validate (ad->linux_ifname, IFNAMSIZ - 1); /* libbpf expects ifname to be at least IFNAMSIZ */
572 ad->netns = (char *) format (0, "%s", args->netns);
574 if (args->prog && af_xdp_load_program (args, ad))
577 q_num = clib_max (rxq_num, txq_num);
578 ad->rxq_num = rxq_num;
579 ad->txq_num = txq_num;
581 vec_validate_aligned (ad->umem, q_num - 1, CLIB_CACHE_LINE_BYTES);
582 vec_validate_aligned (ad->xsk, q_num - 1, CLIB_CACHE_LINE_BYTES);
583 vec_validate_aligned (ad->rxqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
584 vec_validate_aligned (ad->txqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
586 for (i = 0; i < q_num; i++)
588 if (af_xdp_create_queue (vm, args, ad, i))
591 * queue creation failed
592 * it is only a fatal error if we could not create the number of rx
593 * queues requested explicitely by the user and the user did not
595 * we might create less tx queues than workers but this is ok
597 af_xdp_log (VLIB_LOG_LEVEL_DEBUG, ad,
598 "create interface failed to create queue qid=%d", i);
600 /* fixup vectors length */
601 vec_set_len (ad->umem, i);
602 vec_set_len (ad->xsk, i);
603 vec_set_len (ad->rxqs, i);
604 vec_set_len (ad->txqs, i);
606 ad->rxq_num = clib_min (i, rxq_num);
607 ad->txq_num = clib_min (i, txq_num);
610 (i < rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num))
612 ad->rxq_num = ad->txq_num = 0;
613 goto err2; /* failed creating requested rxq: fatal error, bailing
619 clib_error_free (args->error);
624 if (af_xdp_exit_netns (args->netns, ns_fds))
626 args->rv = VNET_API_ERROR_SYSCALL_ERROR_10;
627 args->error = clib_error_return (0, "exit netns failed");
631 ad->dev_instance = ad - am->devices;
632 ad->per_interface_next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
634 vlib_buffer_pool_get_default_for_numa (vm,
639 char *ifname = ad->linux_ifname;
640 if (args->netns != NULL && strncmp (args->netns, "pid:", 4) == 0)
643 (char *) format (0, "%s/%u", ifname, atoi (args->netns + 4));
646 ad->name = (char *) format (0, "%s/%d", ifname, ad->dev_instance);
649 ad->name = (char *) format (0, "%s", args->name);
651 ethernet_mac_address_generate (ad->hwaddr);
653 /* create interface */
654 eir.dev_class_index = af_xdp_device_class.index;
655 eir.dev_instance = ad->dev_instance;
656 eir.address = ad->hwaddr;
657 eir.cb.flag_change = af_xdp_flag_change;
658 eir.cb.set_max_frame_size = af_xdp_set_max_frame_size;
659 ad->hw_if_index = vnet_eth_register_interface (vnm, &eir);
661 sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
662 args->sw_if_index = ad->sw_if_index = sw->sw_if_index;
664 vnet_hw_if_set_caps (vnm, ad->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
666 vnet_hw_if_set_input_node (vnm, ad->hw_if_index, af_xdp_input_node.index);
668 args->error = af_xdp_finalize_queues (vnm, ad, tm->n_vlib_mains);
671 args->rv = VNET_API_ERROR_SYSCALL_ERROR_7;
675 /* buffer template */
676 vec_validate_aligned (ad->buffer_template, 1, CLIB_CACHE_LINE_BYTES);
677 ad->buffer_template->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
678 ad->buffer_template->ref_count = 1;
679 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_RX] = ad->sw_if_index;
680 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_TX] = (u32) ~ 0;
681 ad->buffer_template->buffer_pool_index = ad->pool;
686 af_xdp_delete_if (vm, ad);
688 af_xdp_cleanup_netns (ns_fds);
690 vlib_log_err (am->log_class, "%U", format_clib_error, args->error);
693 static clib_error_t *
694 af_xdp_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
696 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
697 af_xdp_main_t *am = &af_xdp_main;
698 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
699 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
701 if (ad->flags & AF_XDP_DEVICE_F_ERROR)
702 return clib_error_return (0, "device is in error state");
706 vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
707 VNET_HW_INTERFACE_FLAG_LINK_UP);
708 ad->flags |= AF_XDP_DEVICE_F_ADMIN_UP;
709 af_xdp_device_input_refill (ad);
713 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
714 ad->flags &= ~AF_XDP_DEVICE_F_ADMIN_UP;
719 static clib_error_t *
720 af_xdp_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
721 vnet_hw_if_rx_mode mode)
723 af_xdp_main_t *am = &af_xdp_main;
724 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
725 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
726 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
730 default: /* fallthrough */
731 case VNET_HW_IF_RX_MODE_UNKNOWN: /* fallthrough */
732 case VNET_HW_IF_NUM_RX_MODES:
733 return clib_error_create ("uknown rx mode - doing nothing");
734 case VNET_HW_IF_RX_MODE_DEFAULT: /* fallthrough */
735 case VNET_HW_IF_RX_MODE_POLLING:
736 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
737 case VNET_HW_IF_RX_MODE_INTERRUPT: /* fallthrough */
738 case VNET_HW_IF_RX_MODE_ADAPTIVE:
739 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_INTERRUPT);
742 ASSERT (0 && "unreachable");
743 return clib_error_create ("unreachable");
747 af_xdp_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
750 af_xdp_main_t *am = &af_xdp_main;
751 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
752 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
754 /* Shut off redirection */
755 if (node_index == ~0)
757 ad->per_interface_next_index = node_index;
761 ad->per_interface_next_index =
762 vlib_node_add_next (vlib_get_main (), af_xdp_input_node.index,
766 static char *af_xdp_tx_func_error_strings[] = {
768 foreach_af_xdp_tx_func_error
773 af_xdp_clear (u32 dev_instance)
775 af_xdp_main_t *am = &af_xdp_main;
776 af_xdp_device_t *ad = pool_elt_at_index (am->devices, dev_instance);
777 clib_error_free (ad->error);
781 VNET_DEVICE_CLASS (af_xdp_device_class) = {
782 .name = "AF_XDP interface",
783 .format_device = format_af_xdp_device,
784 .format_device_name = format_af_xdp_device_name,
785 .admin_up_down_function = af_xdp_interface_admin_up_down,
786 .rx_mode_change_function = af_xdp_interface_rx_mode_change,
787 .rx_redirect_to_node = af_xdp_set_interface_next_node,
788 .tx_function_n_errors = AF_XDP_TX_N_ERROR,
789 .tx_function_error_strings = af_xdp_tx_func_error_strings,
790 .mac_addr_change_function = af_xdp_mac_change,
791 .clear_counters = af_xdp_clear,
796 af_xdp_init (vlib_main_t * vm)
798 af_xdp_main_t *am = &af_xdp_main;
800 am->log_class = vlib_log_register_class ("af_xdp", 0);
805 VLIB_INIT_FUNCTION (af_xdp_init);
808 * fd.io coding-style-patch-verification: ON
811 * eval: (c-set-style "gnu")