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_mtu (vnet_main_t *vnm, vnet_hw_interface_t *hw, u32 mtu)
73 af_xdp_main_t *am = &af_xdp_main;
74 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
75 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set mtu not supported yet");
76 return vnet_error (VNET_ERR_UNSUPPORTED, 0);
80 af_xdp_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hw, u32 flags)
82 af_xdp_main_t *am = &af_xdp_main;
83 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hw->dev_instance);
88 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "set unicast not supported yet");
90 case ETHERNET_INTERFACE_FLAG_ACCEPT_ALL:
91 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad,
92 "set promiscuous not supported yet");
96 af_xdp_log (VLIB_LOG_LEVEL_ERR, ad, "unknown flag %x requested", flags);
101 af_xdp_enter_netns (char *netns, int *fds)
103 *fds = *(fds + 1) = -1;
106 *fds = clib_netns_open (NULL /* self */);
107 if ((*(fds + 1) = clib_netns_open ((u8 *) netns)) == -1)
108 return VNET_API_ERROR_SYSCALL_ERROR_8;
109 if (clib_setns (*(fds + 1)) == -1)
110 return VNET_API_ERROR_SYSCALL_ERROR_9;
116 af_xdp_cleanup_netns (int *fds)
121 if (*(fds + 1) != -1)
124 *fds = *(fds + 1) = -1;
128 af_xdp_exit_netns (char *netns, int *fds)
134 ret = clib_setns (*fds);
136 af_xdp_cleanup_netns (fds);
143 af_xdp_delete_if (vlib_main_t * vm, af_xdp_device_t * ad)
145 vnet_main_t *vnm = vnet_get_main ();
146 af_xdp_main_t *axm = &af_xdp_main;
147 struct xsk_socket **xsk;
148 struct xsk_umem **umem;
153 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
154 ethernet_delete_interface (vnm, ad->hw_if_index);
157 for (i = 0; i < ad->txq_num; i++)
158 clib_spinlock_free (&vec_elt (ad->txqs, i).lock);
160 vec_foreach (xsk, ad->xsk)
161 xsk_socket__delete (*xsk);
163 vec_foreach (umem, ad->umem)
164 xsk_umem__delete (*umem);
166 for (i = 0; i < ad->rxq_num; i++)
167 clib_file_del_by_index (&file_main, vec_elt (ad->rxqs, i).file_index);
172 af_xdp_enter_netns (ad->netns, ns_fds);
173 bpf_set_link_xdp_fd (ad->linux_ifindex, -1, 0);
174 af_xdp_exit_netns (ad->netns, ns_fds);
176 bpf_object__unload (ad->bpf_obj);
181 vec_free (ad->buffer_template);
185 vec_free (ad->linux_ifname);
186 vec_free (ad->netns);
187 clib_error_free (ad->error);
188 pool_put (axm->devices, ad);
192 af_xdp_load_program (af_xdp_create_if_args_t * args, af_xdp_device_t * ad)
196 ad->linux_ifindex = if_nametoindex (ad->linux_ifname);
197 if (!ad->linux_ifindex)
199 args->rv = VNET_API_ERROR_INVALID_VALUE;
201 clib_error_return_unix (0, "if_nametoindex(%s) failed",
206 if (bpf_prog_load (args->prog, BPF_PROG_TYPE_XDP, &ad->bpf_obj, &fd))
208 args->rv = VNET_API_ERROR_SYSCALL_ERROR_5;
210 clib_error_return_unix (0, "bpf_prog_load(%s) failed", args->prog);
214 #ifndef XDP_FLAGS_REPLACE
215 #define XDP_FLAGS_REPLACE 0
217 if (bpf_set_link_xdp_fd (ad->linux_ifindex, fd, XDP_FLAGS_REPLACE))
219 args->rv = VNET_API_ERROR_SYSCALL_ERROR_6;
221 clib_error_return_unix (0, "bpf_set_link_xdp_fd(%s) failed",
229 bpf_object__unload (ad->bpf_obj);
232 ad->linux_ifindex = ~0;
237 af_xdp_create_queue (vlib_main_t *vm, af_xdp_create_if_args_t *args,
238 af_xdp_device_t *ad, int qid)
240 struct xsk_umem **umem;
241 struct xsk_socket **xsk;
244 struct xsk_umem_config umem_config;
245 struct xsk_socket_config sock_config;
246 struct xdp_options opt;
248 const int is_rx = qid < ad->rxq_num;
249 const int is_tx = qid < ad->txq_num;
251 umem = vec_elt_at_index (ad->umem, qid);
252 xsk = vec_elt_at_index (ad->xsk, qid);
253 rxq = vec_elt_at_index (ad->rxqs, qid);
254 txq = vec_elt_at_index (ad->txqs, qid);
257 * fq and cq must always be allocated even if unused
258 * whereas rx and tx indicates whether we want rxq, txq, or both
260 struct xsk_ring_cons *rx = is_rx ? &rxq->rx : 0;
261 struct xsk_ring_prod *fq = &rxq->fq;
262 struct xsk_ring_prod *tx = is_tx ? &txq->tx : 0;
263 struct xsk_ring_cons *cq = &txq->cq;
266 memset (&umem_config, 0, sizeof (umem_config));
267 umem_config.fill_size = args->rxq_size;
268 umem_config.comp_size = args->txq_size;
269 umem_config.frame_size =
270 sizeof (vlib_buffer_t) + vlib_buffer_get_default_data_size (vm);
271 umem_config.frame_headroom = sizeof (vlib_buffer_t);
272 umem_config.flags = XDP_UMEM_UNALIGNED_CHUNK_FLAG;
274 (umem, uword_to_pointer (vm->buffer_main->buffer_mem_start, void *),
275 vm->buffer_main->buffer_mem_size, fq, cq, &umem_config))
277 args->rv = VNET_API_ERROR_SYSCALL_ERROR_1;
278 args->error = clib_error_return_unix (0, "xsk_umem__create() failed");
282 memset (&sock_config, 0, sizeof (sock_config));
283 sock_config.rx_size = args->rxq_size;
284 sock_config.tx_size = args->txq_size;
285 sock_config.bind_flags = XDP_USE_NEED_WAKEUP;
288 case AF_XDP_MODE_AUTO:
290 case AF_XDP_MODE_COPY:
291 sock_config.bind_flags |= XDP_COPY;
293 case AF_XDP_MODE_ZERO_COPY:
294 sock_config.bind_flags |= XDP_ZEROCOPY;
297 if (xsk_socket__create
298 (xsk, ad->linux_ifname, qid, *umem, rx, tx, &sock_config))
300 args->rv = VNET_API_ERROR_SYSCALL_ERROR_2;
302 clib_error_return_unix (0,
303 "xsk_socket__create() failed (is linux netdev %s up?)",
308 fd = xsk_socket__fd (*xsk);
309 optlen = sizeof (opt);
310 if (getsockopt (fd, SOL_XDP, XDP_OPTIONS, &opt, &optlen))
312 args->rv = VNET_API_ERROR_SYSCALL_ERROR_3;
314 clib_error_return_unix (0, "getsockopt(XDP_OPTIONS) failed");
317 if (opt.flags & XDP_OPTIONS_ZEROCOPY)
318 ad->flags |= AF_XDP_DEVICE_F_ZEROCOPY;
320 rxq->xsk_fd = is_rx ? fd : -1;
325 clib_spinlock_init (&txq->lock);
326 if (is_rx && (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK))
328 /* This is a shared rx+tx queue and we need to lock before syscalls.
329 * Prior to Linux 5.6 there is a race condition preventing to call
330 * poll() and sendto() concurrently on AF_XDP sockets. This was
331 * fixed with commit 11cc2d21499cabe7e7964389634ed1de3ee91d33
332 * to workaround this issue, we protect the syscalls with a
333 * spinlock. Note that it also prevents to use interrupt mode in
334 * multi workers setup, because in this case the poll() is done in
335 * the framework w/o any possibility to protect it.
337 * https://lore.kernel.org/bpf/BYAPR11MB365382C5DB1E5FCC53242609C1549@BYAPR11MB3653.namprd11.prod.outlook.com/
339 clib_spinlock_init (&rxq->syscall_lock);
340 txq->syscall_lock = rxq->syscall_lock;
351 xsk_socket__delete (*xsk);
353 xsk_umem__delete (*umem);
361 af_xdp_get_numa (const char *ifname)
368 (char *) format (0, "/sys/class/net/%s/device/numa_node%c", ifname, 0);
369 err = clib_sysfs_read (path, "%d", &numa);
373 clib_error_free (err);
379 af_xdp_get_q_count (const char *ifname, int *rxq_num, int *txq_num)
381 struct ethtool_channels ec = { .cmd = ETHTOOL_GCHANNELS };
382 struct ifreq ifr = { .ifr_data = (void *) &ec };
385 *rxq_num = *txq_num = 1;
387 fd = socket (AF_INET, SOCK_DGRAM, 0);
391 snprintf (ifr.ifr_name, sizeof (ifr.ifr_name), "%s", ifname);
392 err = ioctl (fd, SIOCETHTOOL, &ifr);
399 *rxq_num = clib_max (ec.combined_count, ec.rx_count);
400 *txq_num = clib_max (ec.combined_count, ec.tx_count);
403 static clib_error_t *
404 af_xdp_device_rxq_read_ready (clib_file_t * f)
406 vnet_hw_if_rx_queue_set_int_pending (vnet_get_main (), f->private_data);
410 static clib_error_t *
411 af_xdp_device_set_rxq_mode (const af_xdp_device_t *ad, af_xdp_rxq_t *rxq,
412 const af_xdp_rxq_mode_t mode)
414 clib_file_main_t *fm = &file_main;
415 clib_file_update_type_t update;
418 if (rxq->mode == mode)
423 case AF_XDP_RXQ_MODE_POLLING:
424 update = UNIX_FILE_UPDATE_DELETE;
426 case AF_XDP_RXQ_MODE_INTERRUPT:
427 if (ad->flags & AF_XDP_DEVICE_F_SYSCALL_LOCK)
428 return clib_error_create (
429 "kernel workaround incompatible with interrupt mode");
430 update = UNIX_FILE_UPDATE_ADD;
434 return clib_error_create ("unknown rxq mode %i", mode);
437 f = clib_file_get (fm, rxq->file_index);
438 fm->file_update (f, update);
444 af_xdp_find_rxq_for_thread (vnet_main_t *vnm, const af_xdp_device_t *ad,
448 for (i = 0; i < ad->rxq_num; i++)
450 const u32 qid = vec_elt (ad->rxqs, i).queue_index;
451 const u32 tid = vnet_hw_if_get_rx_queue (vnm, qid)->thread_index;
458 static clib_error_t *
459 af_xdp_finalize_queues (vnet_main_t *vnm, af_xdp_device_t *ad,
460 const int n_vlib_mains)
462 clib_error_t *err = 0;
465 for (i = 0; i < ad->rxq_num; i++)
467 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, i);
468 rxq->queue_index = vnet_hw_if_register_rx_queue (
469 vnm, ad->hw_if_index, i, VNET_HW_IF_RXQ_THREAD_ANY);
470 u8 *desc = format (0, "%U rxq %d", format_af_xdp_device_name,
471 ad->dev_instance, i);
473 .file_descriptor = rxq->xsk_fd,
474 .private_data = rxq->queue_index,
475 .read_function = af_xdp_device_rxq_read_ready,
478 rxq->file_index = clib_file_add (&file_main, &f);
479 vnet_hw_if_set_rx_queue_file_index (vnm, rxq->queue_index,
481 err = af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
486 for (i = 0; i < ad->txq_num; i++)
487 vec_elt (ad->txqs, i).queue_index =
488 vnet_hw_if_register_tx_queue (vnm, ad->hw_if_index, i);
490 /* We set the rxq and txq of the same queue pair on the same thread
491 * by default to avoid locking because of the syscall lock. */
492 int last_qid = clib_min (ad->rxq_num, ad->txq_num - 1);
493 for (i = 0; i < n_vlib_mains; i++)
495 /* search for the 1st rxq assigned on this thread, if any */
496 u32 qid = af_xdp_find_rxq_for_thread (vnm, ad, i);
497 /* if this rxq is combined with a txq, use it. Otherwise, we'll
498 * assign txq in a round-robin fashion. We start from the 1st txq
499 * not shared with a rxq if possible... */
500 qid = qid < ad->txq_num ? qid : (last_qid++ % ad->txq_num);
501 vnet_hw_if_tx_queue_assign_thread (
502 vnm, vec_elt (ad->txqs, qid).queue_index, i);
505 vnet_hw_if_update_runtime_data (vnm, ad->hw_if_index);
510 af_xdp_create_if (vlib_main_t * vm, af_xdp_create_if_args_t * args)
512 vnet_main_t *vnm = vnet_get_main ();
513 vlib_thread_main_t *tm = vlib_get_thread_main ();
514 vnet_eth_interface_registration_t eir = {};
515 af_xdp_main_t *am = &af_xdp_main;
517 vnet_sw_interface_t *sw;
518 int rxq_num, txq_num, q_num;
522 args->rxq_size = args->rxq_size ? args->rxq_size : 2 * VLIB_FRAME_SIZE;
523 args->txq_size = args->txq_size ? args->txq_size : 2 * VLIB_FRAME_SIZE;
524 args->rxq_num = args->rxq_num ? args->rxq_num : 1;
526 if (!args->linux_ifname)
528 args->rv = VNET_API_ERROR_INVALID_VALUE;
529 args->error = clib_error_return (0, "missing host interface");
533 if (args->rxq_size < VLIB_FRAME_SIZE || args->txq_size < VLIB_FRAME_SIZE ||
534 args->rxq_size > 65535 || args->txq_size > 65535 ||
535 !is_pow2 (args->rxq_size) || !is_pow2 (args->txq_size))
537 args->rv = VNET_API_ERROR_INVALID_VALUE;
539 clib_error_return (0,
540 "queue size must be a power of two between %i and 65535",
545 ret = af_xdp_enter_netns (args->netns, ns_fds);
549 args->error = clib_error_return (0, "enter netns %s failed, ret %d",
550 args->netns, args->rv);
554 af_xdp_get_q_count (args->linux_ifname, &rxq_num, &txq_num);
555 if (args->rxq_num > rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num)
557 args->rv = VNET_API_ERROR_INVALID_VALUE;
558 args->error = clib_error_create ("too many rxq requested (%d > %d)",
559 args->rxq_num, rxq_num);
562 rxq_num = clib_min (rxq_num, args->rxq_num);
563 txq_num = clib_min (txq_num, tm->n_vlib_mains);
565 pool_get_zero (am->devices, ad);
567 if (tm->n_vlib_mains > 1 &&
568 0 == (args->flags & AF_XDP_CREATE_FLAGS_NO_SYSCALL_LOCK))
569 ad->flags |= AF_XDP_DEVICE_F_SYSCALL_LOCK;
571 ad->linux_ifname = (char *) format (0, "%s", args->linux_ifname);
572 vec_validate (ad->linux_ifname, IFNAMSIZ - 1); /* libbpf expects ifname to be at least IFNAMSIZ */
574 ad->netns = (char *) format (0, "%s", args->netns);
576 if (args->prog && af_xdp_load_program (args, ad))
579 q_num = clib_max (rxq_num, txq_num);
580 ad->rxq_num = rxq_num;
581 ad->txq_num = txq_num;
583 vec_validate_aligned (ad->umem, q_num - 1, CLIB_CACHE_LINE_BYTES);
584 vec_validate_aligned (ad->xsk, q_num - 1, CLIB_CACHE_LINE_BYTES);
585 vec_validate_aligned (ad->rxqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
586 vec_validate_aligned (ad->txqs, q_num - 1, CLIB_CACHE_LINE_BYTES);
588 for (i = 0; i < q_num; i++)
590 if (af_xdp_create_queue (vm, args, ad, i))
593 * queue creation failed
594 * it is only a fatal error if we could not create the number of rx
595 * queues requested explicitely by the user and the user did not
597 * we might create less tx queues than workers but this is ok
599 af_xdp_log (VLIB_LOG_LEVEL_DEBUG, ad,
600 "create interface failed to create queue qid=%d", i);
602 /* fixup vectors length */
603 vec_set_len (ad->umem, i);
604 vec_set_len (ad->xsk, i);
605 vec_set_len (ad->rxqs, i);
606 vec_set_len (ad->txqs, i);
608 ad->rxq_num = clib_min (i, rxq_num);
609 ad->txq_num = clib_min (i, txq_num);
612 (i < rxq_num && AF_XDP_NUM_RX_QUEUES_ALL != args->rxq_num))
614 ad->rxq_num = ad->txq_num = 0;
615 goto err2; /* failed creating requested rxq: fatal error, bailing
621 clib_error_free (args->error);
626 if (af_xdp_exit_netns (args->netns, ns_fds))
628 args->rv = VNET_API_ERROR_SYSCALL_ERROR_10;
629 args->error = clib_error_return (0, "exit netns failed");
633 ad->dev_instance = ad - am->devices;
634 ad->per_interface_next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
636 vlib_buffer_pool_get_default_for_numa (vm,
641 char *ifname = ad->linux_ifname;
642 if (args->netns != NULL && strncmp (args->netns, "pid:", 4) == 0)
645 (char *) format (0, "%s/%u", ifname, atoi (args->netns + 4));
648 ad->name = (char *) format (0, "%s/%d", ifname, ad->dev_instance);
651 ad->name = (char *) format (0, "%s", args->name);
653 ethernet_mac_address_generate (ad->hwaddr);
655 /* create interface */
656 eir.dev_class_index = af_xdp_device_class.index;
657 eir.dev_instance = ad->dev_instance;
658 eir.address = ad->hwaddr;
659 eir.cb.flag_change = af_xdp_flag_change;
660 eir.cb.set_mtu = af_xdp_set_mtu;
661 ad->hw_if_index = vnet_eth_register_interface (vnm, &eir);
663 sw = vnet_get_hw_sw_interface (vnm, ad->hw_if_index);
664 args->sw_if_index = ad->sw_if_index = sw->sw_if_index;
666 vnet_hw_if_set_caps (vnm, ad->hw_if_index, VNET_HW_IF_CAP_INT_MODE);
668 vnet_hw_if_set_input_node (vnm, ad->hw_if_index, af_xdp_input_node.index);
670 args->error = af_xdp_finalize_queues (vnm, ad, tm->n_vlib_mains);
673 args->rv = VNET_API_ERROR_SYSCALL_ERROR_7;
677 /* buffer template */
678 vec_validate_aligned (ad->buffer_template, 1, CLIB_CACHE_LINE_BYTES);
679 ad->buffer_template->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
680 ad->buffer_template->ref_count = 1;
681 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_RX] = ad->sw_if_index;
682 vnet_buffer (ad->buffer_template)->sw_if_index[VLIB_TX] = (u32) ~ 0;
683 ad->buffer_template->buffer_pool_index = ad->pool;
688 af_xdp_delete_if (vm, ad);
690 af_xdp_cleanup_netns (ns_fds);
692 vlib_log_err (am->log_class, "%U", format_clib_error, args->error);
695 static clib_error_t *
696 af_xdp_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
698 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
699 af_xdp_main_t *am = &af_xdp_main;
700 af_xdp_device_t *ad = vec_elt_at_index (am->devices, hi->dev_instance);
701 uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
703 if (ad->flags & AF_XDP_DEVICE_F_ERROR)
704 return clib_error_return (0, "device is in error state");
708 vnet_hw_interface_set_flags (vnm, ad->hw_if_index,
709 VNET_HW_INTERFACE_FLAG_LINK_UP);
710 ad->flags |= AF_XDP_DEVICE_F_ADMIN_UP;
711 af_xdp_device_input_refill (ad);
715 vnet_hw_interface_set_flags (vnm, ad->hw_if_index, 0);
716 ad->flags &= ~AF_XDP_DEVICE_F_ADMIN_UP;
721 static clib_error_t *
722 af_xdp_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
723 vnet_hw_if_rx_mode mode)
725 af_xdp_main_t *am = &af_xdp_main;
726 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
727 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
728 af_xdp_rxq_t *rxq = vec_elt_at_index (ad->rxqs, qid);
732 default: /* fallthrough */
733 case VNET_HW_IF_RX_MODE_UNKNOWN: /* fallthrough */
734 case VNET_HW_IF_NUM_RX_MODES:
735 return clib_error_create ("uknown rx mode - doing nothing");
736 case VNET_HW_IF_RX_MODE_DEFAULT: /* fallthrough */
737 case VNET_HW_IF_RX_MODE_POLLING:
738 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_POLLING);
739 case VNET_HW_IF_RX_MODE_INTERRUPT: /* fallthrough */
740 case VNET_HW_IF_RX_MODE_ADAPTIVE:
741 return af_xdp_device_set_rxq_mode (ad, rxq, AF_XDP_RXQ_MODE_INTERRUPT);
744 ASSERT (0 && "unreachable");
745 return clib_error_create ("unreachable");
749 af_xdp_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
752 af_xdp_main_t *am = &af_xdp_main;
753 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
754 af_xdp_device_t *ad = pool_elt_at_index (am->devices, hw->dev_instance);
756 /* Shut off redirection */
757 if (node_index == ~0)
759 ad->per_interface_next_index = node_index;
763 ad->per_interface_next_index =
764 vlib_node_add_next (vlib_get_main (), af_xdp_input_node.index,
768 static char *af_xdp_tx_func_error_strings[] = {
770 foreach_af_xdp_tx_func_error
775 af_xdp_clear (u32 dev_instance)
777 af_xdp_main_t *am = &af_xdp_main;
778 af_xdp_device_t *ad = pool_elt_at_index (am->devices, dev_instance);
779 clib_error_free (ad->error);
783 VNET_DEVICE_CLASS (af_xdp_device_class) = {
784 .name = "AF_XDP interface",
785 .format_device = format_af_xdp_device,
786 .format_device_name = format_af_xdp_device_name,
787 .admin_up_down_function = af_xdp_interface_admin_up_down,
788 .rx_mode_change_function = af_xdp_interface_rx_mode_change,
789 .rx_redirect_to_node = af_xdp_set_interface_next_node,
790 .tx_function_n_errors = AF_XDP_TX_N_ERROR,
791 .tx_function_error_strings = af_xdp_tx_func_error_strings,
792 .mac_addr_change_function = af_xdp_mac_change,
793 .clear_counters = af_xdp_clear,
798 af_xdp_init (vlib_main_t * vm)
800 af_xdp_main_t *am = &af_xdp_main;
802 am->log_class = vlib_log_register_class ("af_xdp", 0);
807 VLIB_INIT_FUNCTION (af_xdp_init);
810 * fd.io coding-style-patch-verification: ON
813 * eval: (c-set-style "gnu")