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_packet.h>
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
24 #include <net/if_arp.h>
26 #include <vlib/vlib.h>
27 #include <vlib/unix/unix.h>
28 #include <vnet/ip/ip.h>
29 #include <vnet/ethernet/ethernet.h>
30 #include <vnet/ip/ip4_packet.h>
31 #include <vnet/ip/ip6_packet.h>
32 #include <vnet/ip/ip_psh_cksum.h>
33 #include <vnet/tcp/tcp_packet.h>
34 #include <vnet/udp/udp_packet.h>
36 #include <af_packet/af_packet.h>
37 #include <vnet/devices/virtio/virtio_std.h>
39 #define foreach_af_packet_tx_func_error \
40 _(FRAME_NOT_READY, "tx frame not ready") \
41 _(TXRING_EAGAIN, "tx sendto temporary failure") \
42 _(TXRING_FATAL, "tx sendto fatal failure") \
43 _(TXRING_OVERRUN, "tx ring overrun")
47 #define _(f,s) AF_PACKET_TX_ERROR_##f,
48 foreach_af_packet_tx_func_error
51 } af_packet_tx_func_error_t;
53 static char *af_packet_tx_func_error_strings[] = {
55 foreach_af_packet_tx_func_error
70 vnet_virtio_net_hdr_t vnet_hdr;
72 } af_packet_tx_trace_t;
74 #ifndef CLIB_MARCH_VARIANT
76 format_af_packet_device_name (u8 * s, va_list * args)
78 u32 i = va_arg (*args, u32);
79 af_packet_main_t *apm = &af_packet_main;
80 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, i);
82 s = format (s, "host-%s", apif->host_if_name);
85 #endif /* CLIB_MARCH_VARIANT */
88 format_af_packet_device (u8 * s, va_list * args)
90 u32 dev_instance = va_arg (*args, u32);
91 u32 indent = format_get_indent (s);
92 int __clib_unused verbose = va_arg (*args, int);
94 af_packet_main_t *apm = &af_packet_main;
95 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, dev_instance);
96 af_packet_queue_t *rx_queue = 0;
97 af_packet_queue_t *tx_queue = 0;
99 s = format (s, "Linux PACKET socket interface %s",
100 (apif->version == TPACKET_V2) ? "v2" : "v3");
101 s = format (s, "\n%UFEATURES:", format_white_space, indent);
102 if (apif->is_qdisc_bypass_enabled)
103 s = format (s, "\n%Uqdisc-bpass-enabled", format_white_space, indent + 2);
104 if (apif->is_cksum_gso_enabled)
105 s = format (s, "\n%Ucksum-gso-enabled", format_white_space, indent + 2);
106 if (apif->is_fanout_enabled)
107 s = format (s, "\n%Ufanout-enabled", format_white_space, indent + 2);
109 vec_foreach (rx_queue, apif->rx_queues)
111 u32 rx_block_size = rx_queue->rx_req->req.tp_block_size;
112 u32 rx_frame_size = rx_queue->rx_req->req.tp_frame_size;
113 u32 rx_frame_nr = rx_queue->rx_req->req.tp_frame_nr;
114 u32 rx_block_nr = rx_queue->rx_req->req.tp_block_nr;
116 s = format (s, "\n%URX Queue %u:", format_white_space, indent,
118 s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
119 format_white_space, indent + 2, rx_block_size, rx_block_nr,
120 rx_frame_size, rx_frame_nr);
121 if (apif->version == TPACKET_V2)
122 s = format (s, " next frame:%d", rx_queue->next_rx_frame);
124 s = format (s, " next block:%d", rx_queue->next_rx_block);
125 if (rx_queue->is_rx_pending)
128 s, "\n%UPending Request: num-rx-pkts:%d next-frame-offset:%d",
129 format_white_space, indent + 2, rx_queue->num_rx_pkts,
130 rx_queue->rx_frame_offset);
134 vec_foreach (tx_queue, apif->tx_queues)
136 clib_spinlock_lock (&tx_queue->lockp);
137 u32 tx_block_sz = tx_queue->tx_req->req.tp_block_size;
138 u32 tx_frame_sz = tx_queue->tx_req->req.tp_frame_size;
139 u32 tx_frame_nr = tx_queue->tx_req->req.tp_frame_nr;
140 u32 tx_block_nr = tx_queue->tx_req->req.tp_block_nr;
142 int n_send_req = 0, n_avail = 0, n_sending = 0, n_tot = 0, n_wrong = 0;
143 u8 *tx_block_start = tx_queue->tx_ring[block];
144 u32 tx_frame = tx_queue->next_tx_frame;
145 tpacket3_hdr_t *tph3;
146 tpacket2_hdr_t *tph2;
148 s = format (s, "\n%UTX Queue %u:", format_white_space, indent,
150 s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
151 format_white_space, indent + 2, tx_block_sz, tx_block_nr,
152 tx_frame_sz, tx_frame_nr);
153 s = format (s, " next frame:%d", tx_queue->next_tx_frame);
154 if (apif->version & TPACKET_V3)
158 (tpacket3_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
159 tx_frame = (tx_frame + 1) % tx_frame_nr;
160 if (tph3->tp_status == 0)
162 else if (tph3->tp_status & TP_STATUS_SEND_REQUEST)
164 else if (tph3->tp_status & TP_STATUS_SENDING)
170 while (tx_frame != tx_queue->next_tx_frame);
175 (tpacket2_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
176 tx_frame = (tx_frame + 1) % tx_frame_nr;
177 if (tph2->tp_status == 0)
179 else if (tph2->tp_status & TP_STATUS_SEND_REQUEST)
181 else if (tph2->tp_status & TP_STATUS_SENDING)
187 while (tx_frame != tx_queue->next_tx_frame);
189 format (s, "\n%Uavailable:%d request:%d sending:%d wrong:%d total:%d",
190 format_white_space, indent + 2, n_avail, n_send_req, n_sending,
192 clib_spinlock_unlock (&tx_queue->lockp);
198 format_af_packet_tx_trace (u8 *s, va_list *va)
200 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
201 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
202 af_packet_tx_trace_t *t = va_arg (*va, af_packet_tx_trace_t *);
203 u32 indent = format_get_indent (s);
205 s = format (s, "af_packet: hw_if_index %u tx-queue %u", t->hw_if_index,
212 "\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
213 "\n%Usec 0x%x nsec 0x%x vlan %U"
214 #ifdef TP_STATUS_VLAN_TPID_VALID
218 format_white_space, indent + 2, format_white_space, indent + 4,
219 t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac,
220 t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec,
221 t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci
222 #ifdef TP_STATUS_VLAN_TPID_VALID
232 "\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
233 "\n%Usec 0x%x nsec 0x%x vlan %U"
234 #ifdef TP_STATUS_VLAN_TPID_VALID
238 format_white_space, indent + 2, format_white_space, indent + 4,
239 t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac,
240 t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec,
241 t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci
242 #ifdef TP_STATUS_VLAN_TPID_VALID
244 t->tph3.hv1.tp_vlan_tpid
249 "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u"
250 "\n%Ugso_size %u csum_start %u csum_offset %u",
251 format_white_space, indent + 2, format_white_space, indent + 4,
252 t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len,
253 format_white_space, indent + 4, t->vnet_hdr.gso_size,
254 t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset);
256 s = format (s, "\n%Ubuffer 0x%x:\n%U%U", format_white_space, indent + 2,
257 t->buffer_index, format_white_space, indent + 4,
258 format_vnet_buffer_no_chain, &t->buffer);
259 s = format (s, "\n%U%U", format_white_space, indent + 2,
260 format_ethernet_header_with_length, t->buffer.pre_data,
261 sizeof (t->buffer.pre_data));
266 af_packet_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
267 vlib_buffer_t *b0, u32 bi, void *tph,
268 vnet_virtio_net_hdr_t *vnet_hdr, u32 hw_if_index,
269 u16 queue_id, u8 is_v2)
271 af_packet_tx_trace_t *t;
272 t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
273 t->hw_if_index = hw_if_index;
274 t->queue_id = queue_id;
275 t->buffer_index = bi;
279 clib_memcpy_fast (&t->tph2, (tpacket2_hdr_t *) tph,
280 sizeof (tpacket2_hdr_t));
282 clib_memcpy_fast (&t->tph3, (tpacket3_hdr_t *) tph,
283 sizeof (tpacket3_hdr_t));
284 clib_memcpy_fast (&t->vnet_hdr, vnet_hdr, sizeof (*vnet_hdr));
285 clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data));
286 clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
287 sizeof (t->buffer.pre_data));
290 static_always_inline void
291 fill_gso_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
293 vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
294 i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
295 if (b0->flags & VNET_BUFFER_F_IS_IP4)
298 vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
299 vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
300 vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
301 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
302 vnet_hdr->csum_start = l4_hdr_offset; // 0x22;
303 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
304 ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
305 if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
306 ip4->checksum = ip4_header_checksum (ip4);
308 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
309 tcp->checksum = ip4_pseudo_header_cksum (ip4);
311 else if (b0->flags & VNET_BUFFER_F_IS_IP6)
314 vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
315 vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
316 vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
317 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
318 vnet_hdr->csum_start = l4_hdr_offset; // 0x36;
319 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
320 ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
322 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
323 tcp->checksum = ip6_pseudo_header_cksum (ip6);
327 static_always_inline void
328 fill_cksum_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
330 vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
331 i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
332 if (b0->flags & VNET_BUFFER_F_IS_IP4)
335 ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
336 if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
337 ip4->checksum = ip4_header_checksum (ip4);
338 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
339 vnet_hdr->csum_start = l4_hdr_offset;
340 if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
343 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
344 tcp->checksum = ip4_pseudo_header_cksum (ip4);
345 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
346 vnet_hdr->hdr_len = l4_hdr_offset + tcp_header_bytes (tcp);
348 else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
351 (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
352 udp->checksum = ip4_pseudo_header_cksum (ip4);
353 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
354 vnet_hdr->hdr_len = l4_hdr_offset + sizeof (udp_header_t);
357 else if (b0->flags & VNET_BUFFER_F_IS_IP6)
360 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
361 vnet_hdr->csum_start = l4_hdr_offset;
362 ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
363 if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
366 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
367 tcp->checksum = ip6_pseudo_header_cksum (ip6);
368 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
369 vnet_hdr->hdr_len = l4_hdr_offset + tcp_header_bytes (tcp);
371 else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
374 (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
375 udp->checksum = ip6_pseudo_header_cksum (ip6);
376 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
377 vnet_hdr->hdr_len = l4_hdr_offset + sizeof (udp_header_t);
382 VNET_DEVICE_CLASS_TX_FN (af_packet_device_class) (vlib_main_t * vm,
383 vlib_node_runtime_t * node,
384 vlib_frame_t * frame)
386 af_packet_main_t *apm = &af_packet_main;
387 vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
388 u32 *buffers = vlib_frame_vector_args (frame);
389 u32 n_left = frame->n_vectors;
391 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
392 af_packet_if_t *apif =
393 pool_elt_at_index (apm->interfaces, rd->dev_instance);
394 u16 queue_id = tf->queue_id;
395 af_packet_queue_t *tx_queue = vec_elt_at_index (apif->tx_queues, queue_id);
396 u32 block = 0, frame_size = 0, frame_num = 0, tx_frame = 0;
398 tpacket3_hdr_t *tph3 = 0;
399 tpacket2_hdr_t *tph2 = 0;
400 u32 frame_not_ready = 0;
401 u8 is_cksum_gso_enabled = (apif->is_cksum_gso_enabled == 1) ? 1 : 0;
402 u32 tpacket_align = 0;
403 u8 is_v2 = (apif->version == TPACKET_V2) ? 1 : 0;
405 if (tf->shared_queue)
406 clib_spinlock_lock (&tx_queue->lockp);
408 frame_size = tx_queue->tx_req->req.tp_frame_size;
409 frame_num = tx_queue->tx_req->req.tp_frame_nr;
410 block_start = tx_queue->tx_ring[block];
411 tx_frame = tx_queue->next_tx_frame;
414 tpacket_align = TPACKET_ALIGN (sizeof (tpacket2_hdr_t));
418 vnet_virtio_net_hdr_t *vnet_hdr = 0;
420 vlib_buffer_t *b0 = 0, *b0_first = 0;
423 bi = bi_first = buffers[0];
427 tph2 = (tpacket2_hdr_t *) (block_start + tx_frame * frame_size);
428 if (PREDICT_FALSE (tph2->tp_status &
429 (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
435 b0_first = b0 = vlib_get_buffer (vm, bi);
437 if (PREDICT_TRUE (is_cksum_gso_enabled))
440 (vnet_virtio_net_hdr_t *) ((u8 *) tph2 + tpacket_align);
442 clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
443 offset = sizeof (vnet_virtio_net_hdr_t);
445 if (b0->flags & VNET_BUFFER_F_GSO)
446 fill_gso_offload (b0, vnet_hdr);
447 else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
448 fill_cksum_offload (b0, vnet_hdr);
451 len = b0->current_length;
452 clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
453 vlib_buffer_get_current (b0), len);
456 while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
458 b0 = vlib_get_buffer (vm, b0->next_buffer);
459 len = b0->current_length;
460 clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
461 vlib_buffer_get_current (b0), len);
465 tph2->tp_len = tph2->tp_snaplen = offset;
466 tph2->tp_status = TP_STATUS_SEND_REQUEST;
469 if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
471 if (PREDICT_TRUE (is_cksum_gso_enabled))
472 af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
473 vnet_hdr, apif->hw_if_index, queue_id, 1);
476 vnet_virtio_net_hdr_t vnet_hdr2 = {};
477 af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
478 &vnet_hdr2, apif->hw_if_index, queue_id,
482 tx_frame = (tx_frame + 1) % frame_num;
485 /* check if we've exhausted the ring */
486 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
492 tpacket_align = TPACKET_ALIGN (sizeof (tpacket3_hdr_t));
497 vnet_virtio_net_hdr_t *vnet_hdr = 0;
499 vlib_buffer_t *b0 = 0, *b0_first = 0;
502 bi = bi_first = buffers[0];
506 tph3 = (tpacket3_hdr_t *) (block_start + tx_frame * frame_size);
507 if (PREDICT_FALSE (tph3->tp_status &
508 (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
514 b0_first = b0 = vlib_get_buffer (vm, bi);
516 if (PREDICT_TRUE (is_cksum_gso_enabled))
519 (vnet_virtio_net_hdr_t *) ((u8 *) tph3 + tpacket_align);
521 clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
522 offset = sizeof (vnet_virtio_net_hdr_t);
524 if (b0->flags & VNET_BUFFER_F_GSO)
525 fill_gso_offload (b0, vnet_hdr);
526 else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
527 fill_cksum_offload (b0, vnet_hdr);
530 len = b0->current_length;
531 clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
532 vlib_buffer_get_current (b0), len);
535 while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
537 b0 = vlib_get_buffer (vm, b0->next_buffer);
538 len = b0->current_length;
539 clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
540 vlib_buffer_get_current (b0), len);
544 tph3->tp_len = tph3->tp_snaplen = offset;
545 tph3->tp_status = TP_STATUS_SEND_REQUEST;
548 if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
550 if (PREDICT_TRUE (is_cksum_gso_enabled))
551 af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
552 vnet_hdr, apif->hw_if_index, queue_id, 0);
555 vnet_virtio_net_hdr_t vnet_hdr2 = {};
556 af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
557 &vnet_hdr2, apif->hw_if_index, queue_id,
561 tx_frame = (tx_frame + 1) % frame_num;
564 /* check if we've exhausted the ring */
565 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
569 CLIB_MEMORY_BARRIER ();
571 if (PREDICT_TRUE (n_sent || tx_queue->is_tx_pending))
573 tx_queue->next_tx_frame = tx_frame;
574 tx_queue->is_tx_pending = 0;
577 sendto (tx_queue->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1))
579 /* Uh-oh, drop & move on, but count whether it was fatal or not.
580 * Note that we have no reliable way to properly determine the
581 * disposition of the packets we just enqueued for delivery.
585 if (unix_error_is_fatal (errno))
587 counter = AF_PACKET_TX_ERROR_TXRING_FATAL;
591 counter = AF_PACKET_TX_ERROR_TXRING_EAGAIN;
592 /* non-fatal error: kick again next time
593 * note that you could still end up in a deadlock: if you do not
594 * try to send new packets (ie reschedule this tx node), eg.
595 * because your peer is waiting for the unsent packets to reply
596 * to you but your waiting for its reply etc., you are not going
597 * to kick again, and everybody is waiting for the other to talk
599 tx_queue->is_tx_pending = 1;
602 vlib_error_count (vm, node->node_index, counter, 1);
606 if (tf->shared_queue)
607 clib_spinlock_unlock (&tx_queue->lockp);
609 if (PREDICT_FALSE (frame_not_ready))
610 vlib_error_count (vm, node->node_index,
611 AF_PACKET_TX_ERROR_FRAME_NOT_READY, frame_not_ready);
613 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
614 vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN,
617 vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
618 return frame->n_vectors;
622 af_packet_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
625 af_packet_main_t *apm = &af_packet_main;
626 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
627 af_packet_if_t *apif =
628 pool_elt_at_index (apm->interfaces, hw->dev_instance);
630 /* Shut off redirection */
631 if (node_index == ~0)
633 apif->per_interface_next_index = node_index;
637 apif->per_interface_next_index =
638 vlib_node_add_next (vlib_get_main (), af_packet_input_node.index,
643 af_packet_clear_hw_interface_counters (u32 instance)
645 /* Nothing for now */
648 static clib_error_t *
649 af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
652 af_packet_main_t *apm = &af_packet_main;
653 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
654 af_packet_if_t *apif =
655 pool_elt_at_index (apm->interfaces, hw->dev_instance);
657 int rv, fd = socket (AF_UNIX, SOCK_DGRAM, 0);
662 vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
667 /* if interface is a bridge ignore */
668 if (apif->host_if_index < 0)
669 goto error; /* no error */
671 /* use host_if_index in case host name has changed */
672 ifr.ifr_ifindex = apif->host_if_index;
673 if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
675 vlib_log_warn (apm->log_class,
676 "af_packet_%s ioctl could not retrieve eth name",
681 apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
683 if ((rv = ioctl (fd, SIOCGIFFLAGS, &ifr)) < 0)
685 vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
686 apif->is_admin_up ? "up" : "down", rv);
690 if (apif->is_admin_up)
692 hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
693 ifr.ifr_flags |= IFF_UP;
698 ifr.ifr_flags &= ~IFF_UP;
701 if ((rv = ioctl (fd, SIOCSIFFLAGS, &ifr)) < 0)
703 vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
704 apif->is_admin_up ? "up" : "down", rv);
708 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
714 return 0; /* no error */
717 static clib_error_t *
718 af_packet_subif_add_del_function (vnet_main_t * vnm,
720 struct vnet_sw_interface_t *st, int is_add)
722 /* Nothing for now */
726 static clib_error_t *af_packet_set_mac_address_function
727 (struct vnet_hw_interface_t *hi, const u8 * old_address, const u8 * address)
729 af_packet_main_t *apm = &af_packet_main;
730 af_packet_if_t *apif =
731 pool_elt_at_index (apm->interfaces, hi->dev_instance);
735 if (apif->mode == AF_PACKET_IF_MODE_IP)
737 vlib_log_warn (apm->log_class, "af_packet_%s interface is in IP mode",
739 return clib_error_return (0,
740 " MAC update failed, interface is in IP mode");
743 fd = socket (AF_UNIX, SOCK_DGRAM, 0);
746 vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
751 /* if interface is a bridge ignore */
752 if (apif->host_if_index < 0)
753 goto error; /* no error */
755 /* use host_if_index in case host name has changed */
756 ifr.ifr_ifindex = apif->host_if_index;
757 if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
761 "af_packet_%s ioctl could not retrieve eth name, error: %d",
762 apif->host_if_name, rv);
766 clib_memcpy (ifr.ifr_hwaddr.sa_data, address, 6);
767 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
769 if ((rv = ioctl (fd, SIOCSIFHWADDR, &ifr)) < 0)
771 vlib_log_warn (apm->log_class,
772 "af_packet_%s ioctl could not set mac, error: %d",
773 apif->host_if_name, rv);
782 return 0; /* no error */
785 static clib_error_t *
786 af_packet_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
787 vnet_hw_if_rx_mode mode)
789 af_packet_main_t *apm = &af_packet_main;
790 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
791 af_packet_if_t *apif;
793 apif = vec_elt_at_index (apm->interfaces, hw->dev_instance);
795 if (mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
797 vlib_log_err (apm->log_class,
798 "af_packet_%s adaptive mode is not supported",
800 return clib_error_return (
801 0, "af_packet_%s adaptive mode is not supported", apif->host_if_name);
804 af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, qid);
806 if (rx_queue->mode != mode)
808 rx_queue->mode = mode;
810 if (mode == VNET_HW_IF_RX_MODE_POLLING)
811 apm->polling_count++;
812 else if (mode == VNET_HW_IF_RX_MODE_INTERRUPT && apm->polling_count > 0)
813 apm->polling_count--;
819 VNET_DEVICE_CLASS (af_packet_device_class) = {
821 .format_device_name = format_af_packet_device_name,
822 .format_device = format_af_packet_device,
823 .format_tx_trace = format_af_packet_tx_trace,
824 .tx_function_n_errors = AF_PACKET_TX_N_ERROR,
825 .tx_function_error_strings = af_packet_tx_func_error_strings,
826 .rx_redirect_to_node = af_packet_set_interface_next_node,
827 .clear_counters = af_packet_clear_hw_interface_counters,
828 .admin_up_down_function = af_packet_interface_admin_up_down,
829 .subif_add_del_function = af_packet_subif_add_del_function,
830 .mac_addr_change_function = af_packet_set_mac_address_function,
831 .rx_mode_change_function = af_packet_interface_rx_mode_change,
835 * fd.io coding-style-patch-verification: ON
838 * eval: (c-set-style "gnu")