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 #ifndef XDP_FLAGS_REPLACE
216 #define XDP_FLAGS_REPLACE 0
218 if (bpf_set_link_xdp_fd (ad->linux_ifindex, fd, XDP_FLAGS_REPLACE))
220 args->rv = VNET_API_ERROR_SYSCALL_ERROR_6;
222 clib_error_return_unix (0, "bpf_set_link_xdp_fd(%s) failed",
230 bpf_object__unload (ad->bpf_obj);
233 ad->linux_ifindex = ~0;
238 af_xdp_create_queue (vlib_main_t *vm, af_xdp_create_if_args_t *args,
239 af_xdp_device_t *ad, int qid)
241 struct xsk_umem **umem;
242 struct xsk_socket **xsk;
245 struct xsk_umem_config umem_config;
246 struct xsk_socket_config sock_config;
247 struct xdp_options opt;
249 const int is_rx = qid < ad->rxq_num;
250 const int is_tx = qid < ad->txq_num;
252 umem = vec_elt_at_index (ad->umem, qid);
253 xsk = vec_elt_at_index (ad->xsk, qid);
254 rxq = vec_elt_at_index (ad->rxqs, qid);
255 txq = vec_elt_at_index (ad->txqs, qid);
258 * fq and cq must always be allocated even if unused
259 * whereas rx and tx indicates whether we want rxq, txq, or both
261 struct xsk_ring_cons *rx = is_rx ? &rxq->rx : 0;
262 struct xsk_ring_prod *fq = &rxq->fq;
263 struct xsk_ring_prod *tx = is_tx ? &txq->tx : 0;
264 struct xsk_ring_cons *cq = &txq->cq;
267 memset (&umem_config, 0, sizeof (umem_config));
268 umem_config.fill_size = args->rxq_size;
269 umem_config.comp_size = args->txq_size;
270 umem_config.frame_size =
271 sizeof (vlib_buffer_t) + vlib_buffer_get_default_data_size (vm);
272 umem_config.frame_headroom = sizeof (vlib_buffer_t);
273 umem_config.flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG;
275 (umem, uword_to_pointer (vm->buffer_main->buffer_mem_start, void *),
276 vm->buffer_main->buffer_mem_size, fq, cq, &umem_config))
278 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
279 args->error = clib_error_return_unix (0, "xsk_umem__create() failed");
283 memset (&sock_config, 0, sizeof (sock_config));
284 sock_config.rx_size = args->rxq_size;
285 sock_config.tx_size = args->txq_size;
286 sock_config.bind_flags = XDP_USE_NEED_WAKEUP;
289 case AF_XDP_MODE_AUTO:
291 case AF_XDP_MODE_COPY:
292 sock_config.bind_flags |= XDP_COPY;
294 case AF_XDP_MODE_ZERO_COPY:
295 sock_config.bind_flags |= XDP_ZEROCOPY;
298 if (xsk_socket__create
299 (xsk, ad->linux_ifname, qid, *umem, rx, tx, &sock_config))
301 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
303 clib_error_return_unix (0,
304 "xsk_socket__create() failed (is linux netdev %s up?)",
309 fd = xsk_socket__fd (*xsk);
310 optlen = sizeof (opt);
311 if (getsockopt (fd, SOL_XDP, XDP_OPTIONS, &opt, &optlen))
313 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
315 clib_error_return_unix (0, "getsockopt(XDP_OPTIONS) failed");
318 if (opt.flags & XDP_OPTIONS_ZEROCOPY)
319 ad->flags |= AF_XDP_DEVICE_F_ZEROCOPY;
321 rxq->xsk_fd = is_rx ? fd : -1;
326 clib_spinlock_init (&txq->lock);
327 if (is_rx && (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK))
329 /* This is a shared rx+tx queue and we need to lock before syscalls.
330 * Prior to Linux 5.6 there is a race condition preventing to call
331 * poll() and sendto() concurrently on AF_XDP sockets. This was
332 * fixed with commit 11cc2d21499cabe7e7964389634ed1de3ee91d33
333 * to workaround this issue, we protect the syscalls with a
334 * spinlock. Note that it also prevents to use interrupt mode in
335 * multi workers setup, because in this case the poll() is done in
336 * the framework w/o any possibility to protect it.
338 * https://lore.kernel.org/bpf/BYAPR11MB365382C5DB1E5FCC53242609C1549@BYAPR11MB3653.namprd11.prod.outlook.com/
340 clib_spinlock_init (&rxq->syscall_lock);
341 txq->syscall_lock = rxq->syscall_lock;
352 xsk_socket__delete (*xsk);
354 xsk_umem__delete (*umem);
362 af_xdp_get_numa (const char *ifname)
369 (char *) format (0, "/sys/class/net/%s/device/numa_node%c", ifname, 0);
370 err = clib_sysfs_read (path, "%d", &numa);
374 clib_error_free (err);
380 af_xdp_get_q_count (const char *ifname, int *rxq_num, int *txq_num)
382 struct ethtool_channels ec = { .cmd = ETHTOOL_GCHANNELS };
383 struct ifreq ifr = { .ifr_data = (void *) &ec };
386 *rxq_num = *txq_num = 1;
388 fd = socket (AF_INET, SOCK_DGRAM, 0);
392 snprintf (ifr.ifr_name, sizeof (ifr.ifr_name), "%s", ifname);
393 err = ioctl (fd, SIOCETHTOOL, &ifr);
400 *rxq_num = clib_max (ec.combined_count, ec.rx_count);
401 *txq_num = clib_max (ec.combined_count, ec.tx_count);
404 static clib_error_t *
405 af_xdp_device_rxq_read_ready (clib_file_t * f)
407 vnet_hw_if_rx_queue_set_int_pending (vnet_get_main (), f->private_data);
411 static clib_error_t *
412 af_xdp_device_set_rxq_mode (const af_xdp_device_t *ad, af_xdp_rxq_t *rxq,
413 const af_xdp_rxq_mode_t mode)
415 clib_file_main_t *fm = &file_main;
416 clib_file_update_type_t update;
419 if (rxq->mode == mode)
424 case AF_XDP_RXQ_MODE_POLLING:
425 update = UNIX_FILE_UPDATE_DELETE;
427 case AF_XDP_RXQ_MODE_INTERRUPT:
428 if (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK)
429 return clib_error_create (
430 "kernel workaround incompatible with interrupt mode");
431 update = UNIX_FILE_UPDATE_ADD;
435 return clib_error_create ("unknown rxq mode %i", mode);
438 f = clib_file_get (fm, rxq->file_index);
439 fm->file_update (f, update);
445 af_xdp_find_rxq_for_thread (vnet_main_t *vnm, const af_xdp_device_t *ad,
449 for (i = 0; i < ad->rxq_num; i++)
451 const u32 qid = vec_elt (ad->rxqs, i).queue_index;
452 const u32 tid = vnet_hw_if_get_rx_queue (vnm, qid)->thread_index;
459 static clib_error_t *
460 af_xdp_finalize_queues (vnet_main_t *vnm, af_xdp_device_t *ad,
461 const int n_vlib_mains)
463 clib_error_t *err = 0;
466 for (i = 0; i < ad->rxq_num; i++)
468 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
469 rxq->queue_index = vnet_hw_if_register_rx_queue (
470 vnm, ad->hw_if_index, i, VNET_HW_IF_RXQ_THREAD_ANY);
471 u8 *desc = format (0, "%U rxq %d", format_af_xdp_device_name,
472 ad->dev_instance, i);
474 .file_descriptor = rxq->xsk_fd,
475 .private_data = rxq->queue_index,
476 .read_function = af_xdp_device_rxq_read_ready,
479 rxq->file_index = clib_file_add (&file_main, &f);
480 vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
482 err = af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
487 for (i = 0; i < ad->txq_num; i++)
488 vec_elt (ad->txqs, i).queue_index =
489 vnet_hw_if_register_tx_queue (vnm, ad->hw_if_index, i);
491 /* We set the rxq and txq of the same queue pair on the same thread
492 * by default to avoid locking because of the syscall lock. */
493 int last_qid = clib_min (ad->rxq_num, ad->txq_num - 1);
494 for (i = 0; i < n_vlib_mains; i++)
496 /* search for the 1st rxq assigned on this thread, if any */
497 u32 qid = af_xdp_find_rxq_for_thread (vnm, ad, i);
498 /* if this rxq is combined with a txq, use it. Otherwise, we'll
499 * assign txq in a round-robin fashion. We start from the 1st txq
500 * not shared with a rxq if possible... */
501 qid = qid < ad->txq_num ? qid : (last_qid++ % ad->txq_num);
502 vnet_hw_if_tx_queue_assign_thread (
503 vnm, vec_elt (ad->txqs, qid).queue_index, i);
506 vnet_hw_if_update_runtime_data (vnm, ad->hw_if_index);
511 af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args)
513 vnet_main_t *vnm = vnet_get_main ();
514 vlib_thread_main_t *tm = vlib_get_thread_main ();
515 vnet_eth_interface_registration_t eir = {};
516 af_xdp_main_t *am = &af_xdp_main;
518 vnet_sw_interface_t *sw;
519 int rxq_num, txq_num, q_num;
523 args->rxq_size = args->rxq_size ? args->rxq_size : 2 * VLIB_FRAME_SIZE;
524 args->txq_size = args->txq_size ? args->txq_size : 2 * VLIB_FRAME_SIZE;
525 args->rxq_num = args->rxq_num ? args->rxq_num : 1;
527 if (!args->linux_ifname)
529 args->rv = VNET_API_ERROR_INVALID_VALUE;
530 args->error = clib_error_return (0, "missing host interface");
534 if (args->rxq_size < VLIB_FRAME_SIZE || args->txq_size < VLIB_FRAME_SIZE ||
535 args->rxq_size > 65535 || args->txq_size > 65535 ||
536 !is_pow2 (args->rxq_size) || !is_pow2 (args->txq_size))
538 args->rv = VNET_API_ERROR_INVALID_VALUE;
540 clib_error_return (0,
541 "queue size must be a power of two between %i and 65535",
546 ret = af_xdp_enter_netns (args->netns, ns_fds);
550 args->error = clib_error_return (0, "enter netns %s failed, ret %d",
551 args->netns, args->rv);
555 af_xdp_get_q_count (args->linux_ifname, &rxq_num, &txq_num);
556 if (args->rxq_num > rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num)
558 args->rv = VNET_API_ERROR_INVALID_VALUE;
559 args->error = clib_error_create ("too many rxq requested (%d > %d)",
560 args->rxq_num, rxq_num);
563 rxq_num = clib_min (rxq_num, args->rxq_num);
564 txq_num = clib_min (txq_num, tm->n_vlib_mains);
566 pool_get_zero (am->devices, ad);
568 if (tm->n_vlib_mains > 1 &&
569 0 == (args->flags & AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK))
570 ad->flags |= AF_XDP_DEVICE_F_SYSCALL_LOCK;
572 ad->linux_ifname = (char *) format (0, "%s", args->linux_ifname);
573 vec_validate (ad->linux_ifname, IFNAMSIZ - 1); /* libbpf expects ifname to be at least IFNAMSIZ */
575 ad->netns = (char *) format (0, "%s", args->netns);
577 if (args->prog && af_xdp_load_program (args, ad))
580 q_num = clib_max (rxq_num, txq_num);
581 ad->rxq_num = rxq_num;
582 ad->txq_num = txq_num;
584 vec_validate_aligned (ad->umem, q_num - 1, CLIB_CACHE_LINE_BYTES);
585 vec_validate_aligned (ad->xsk, q_num - 1, CLIB_CACHE_LINE_BYTES);
586 vec_validate_aligned (ad->rxqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
587 vec_validate_aligned (ad->txqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
589 for (i = 0; i < q_num; i++)
591 if (af_xdp_create_queue (vm, args, ad, i))
594 * queue creation failed
595 * it is only a fatal error if we could not create the number of rx
596 * queues requested explicitely by the user and the user did not
598 * we might create less tx queues than workers but this is ok
600 af_xdp_log (VLIB_LOG_LEVEL_DEBUG, ad,
601 "create interface failed to create queue qid=%d", i);
603 /* fixup vectors length */
604 vec_set_len (ad->umem, i);
605 vec_set_len (ad->xsk, i);
606 vec_set_len (ad->rxqs, i);
607 vec_set_len (ad->txqs, i);
609 ad->rxq_num = clib_min (i, rxq_num);
610 ad->txq_num = clib_min (i, txq_num);
613 (i < rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num))
615 ad->rxq_num = ad->txq_num = 0;
616 goto err2; /* failed creating requested rxq: fatal error, bailing
622 clib_error_free (args->error);
627 if (af_xdp_exit_netns (args->netns, ns_fds))
629 args->rv = VNET_API_ERROR_SYSCALL_ERROR_10;
630 args->error = clib_error_return (0, "exit netns failed");
634 ad->dev_instance = ad - am->devices;
635 ad->per_interface_next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
637 vlib_buffer_pool_get_default_for_numa (vm,
642 char *ifname = ad->linux_ifname;
643 if (args->netns != NULL && strncmp (args->netns, "pid:", 4) == 0)
646 (char *) format (0, "%s/%u", ifname, atoi (args->netns + 4));
649 ad->name = (char *) format (0, "%s/%d", ifname, ad->dev_instance);
652 ad->name = (char *) format (0, "%s", args->name);
654 ethernet_mac_address_generate (ad->hwaddr);
656 /* create interface */
657 eir.dev_class_index = af_xdp_device_class.index;
658 eir.dev_instance = ad->dev_instance;
659 eir.address = ad->hwaddr;
660 eir.cb.flag_change = af_xdp_flag_change;
661 eir.cb.set_max_frame_size = af_xdp_set_max_frame_size;
662 ad->hw_if_index = vnet_eth_register_interface (vnm, &eir);
664 sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
665 args->sw_if_index = ad->sw_if_index = sw->sw_if_index;
667 vnet_hw_if_set_caps (vnm, ad->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
669 vnet_hw_if_set_input_node (vnm, ad->hw_if_index, af_xdp_input_node.index);
671 args->error = af_xdp_finalize_queues (vnm, ad, tm->n_vlib_mains);
674 args->rv = VNET_API_ERROR_SYSCALL_ERROR_7;
678 /* buffer template */
679 vec_validate_aligned (ad->buffer_template, 1, CLIB_CACHE_LINE_BYTES);
680 ad->buffer_template->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
681 ad->buffer_template->ref_count = 1;
682 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_RX] = ad->sw_if_index;
683 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_TX] = (u32) ~ 0;
684 ad->buffer_template->buffer_pool_index = ad->pool;
689 af_xdp_delete_if (vm, ad);
691 af_xdp_cleanup_netns (ns_fds);
693 vlib_log_err (am->log_class, "%U", format_clib_error, args->error);
696 static clib_error_t *
697 af_xdp_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
699 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
700 af_xdp_main_t *am = &af_xdp_main;
701 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
702 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
704 if (ad->flags & AF_XDP_DEVICE_F_ERROR)
705 return clib_error_return (0, "device is in error state");
709 vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
710 VNET_HW_INTERFACE_FLAG_LINK_UP);
711 ad->flags |= AF_XDP_DEVICE_F_ADMIN_UP;
712 af_xdp_device_input_refill (ad);
716 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
717 ad->flags &= ~AF_XDP_DEVICE_F_ADMIN_UP;
722 static clib_error_t *
723 af_xdp_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
724 vnet_hw_if_rx_mode mode)
726 af_xdp_main_t *am = &af_xdp_main;
727 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
728 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
729 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
733 default: /* fallthrough */
734 case VNET_HW_IF_RX_MODE_UNKNOWN: /* fallthrough */
735 case VNET_HW_IF_NUM_RX_MODES:
736 return clib_error_create ("uknown rx mode - doing nothing");
737 case VNET_HW_IF_RX_MODE_DEFAULT: /* fallthrough */
738 case VNET_HW_IF_RX_MODE_POLLING:
739 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
740 case VNET_HW_IF_RX_MODE_INTERRUPT: /* fallthrough */
741 case VNET_HW_IF_RX_MODE_ADAPTIVE:
742 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_INTERRUPT);
745 ASSERT (0 && "unreachable");
746 return clib_error_create ("unreachable");
750 af_xdp_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
753 af_xdp_main_t *am = &af_xdp_main;
754 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
755 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
757 /* Shut off redirection */
758 if (node_index == ~0)
760 ad->per_interface_next_index = node_index;
764 ad->per_interface_next_index =
765 vlib_node_add_next (vlib_get_main (), af_xdp_input_node.index,
769 static char *af_xdp_tx_func_error_strings[] = {
771 foreach_af_xdp_tx_func_error
776 af_xdp_clear (u32 dev_instance)
778 af_xdp_main_t *am = &af_xdp_main;
779 af_xdp_device_t *ad = pool_elt_at_index (am->devices, dev_instance);
780 clib_error_free (ad->error);
784 VNET_DEVICE_CLASS (af_xdp_device_class) = {
785 .name = "AF_XDP interface",
786 .format_device = format_af_xdp_device,
787 .format_device_name = format_af_xdp_device_name,
788 .admin_up_down_function = af_xdp_interface_admin_up_down,
789 .rx_mode_change_function = af_xdp_interface_rx_mode_change,
790 .rx_redirect_to_node = af_xdp_set_interface_next_node,
791 .tx_function_n_errors = AF_XDP_TX_N_ERROR,
792 .tx_function_error_strings = af_xdp_tx_func_error_strings,
793 .mac_addr_change_function = af_xdp_mac_change,
794 .clear_counters = af_xdp_clear,
799 af_xdp_init (vlib_main_t * vm)
801 af_xdp_main_t *am = &af_xdp_main;
803 am->log_class = vlib_log_register_class ("af_xdp", 0);
808 VLIB_INIT_FUNCTION (af_xdp_init);
811 * fd.io coding-style-patch-verification: ON
814 * eval: (c-set-style "gnu")