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>
38 #include <vnet/devices/netlink.h>
40 #define foreach_af_packet_tx_func_error \
41 _(FRAME_NOT_READY, "tx frame not ready") \
42 _(TXRING_EAGAIN, "tx sendto temporary failure") \
43 _(TXRING_FATAL, "tx sendto fatal failure") \
44 _(TXRING_OVERRUN, "tx ring overrun")
48 #define _(f,s) AF_PACKET_TX_ERROR_##f,
49 foreach_af_packet_tx_func_error
52 } af_packet_tx_func_error_t;
54 static char *af_packet_tx_func_error_strings[] = {
56 foreach_af_packet_tx_func_error
71 vnet_virtio_net_hdr_t vnet_hdr;
73 } af_packet_tx_trace_t;
75 #ifndef CLIB_MARCH_VARIANT
77 format_af_packet_device_name (u8 * s, va_list * args)
79 u32 i = va_arg (*args, u32);
80 af_packet_main_t *apm = &af_packet_main;
81 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, i);
83 s = format (s, "host-%s", apif->host_if_name);
86 #endif /* CLIB_MARCH_VARIANT */
89 format_af_packet_device (u8 * s, va_list * args)
91 u32 dev_instance = va_arg (*args, u32);
92 u32 indent = format_get_indent (s);
93 int __clib_unused verbose = va_arg (*args, int);
95 af_packet_main_t *apm = &af_packet_main;
96 af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, dev_instance);
97 af_packet_queue_t *rx_queue = 0;
98 af_packet_queue_t *tx_queue = 0;
100 s = format (s, "Linux PACKET socket interface %s",
101 (apif->version == TPACKET_V2) ? "v2" : "v3");
102 s = format (s, "\n%UFEATURES:", format_white_space, indent);
103 if (apif->is_qdisc_bypass_enabled)
104 s = format (s, "\n%Uqdisc-bpass-enabled", format_white_space, indent + 2);
105 if (apif->is_cksum_gso_enabled)
106 s = format (s, "\n%Ucksum-gso-enabled", format_white_space, indent + 2);
107 if (apif->is_fanout_enabled)
108 s = format (s, "\n%Ufanout-enabled", format_white_space, indent + 2);
110 vec_foreach (rx_queue, apif->rx_queues)
112 u32 rx_block_size = rx_queue->rx_req->req.tp_block_size;
113 u32 rx_frame_size = rx_queue->rx_req->req.tp_frame_size;
114 u32 rx_frame_nr = rx_queue->rx_req->req.tp_frame_nr;
115 u32 rx_block_nr = rx_queue->rx_req->req.tp_block_nr;
117 s = format (s, "\n%URX Queue %u:", format_white_space, indent,
119 s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
120 format_white_space, indent + 2, rx_block_size, rx_block_nr,
121 rx_frame_size, rx_frame_nr);
122 if (apif->version == TPACKET_V2)
123 s = format (s, " next frame:%d", rx_queue->next_rx_frame);
125 s = format (s, " next block:%d", rx_queue->next_rx_block);
126 if (rx_queue->is_rx_pending)
129 s, "\n%UPending Request: num-rx-pkts:%d next-frame-offset:%d",
130 format_white_space, indent + 2, rx_queue->num_rx_pkts,
131 rx_queue->rx_frame_offset);
135 vec_foreach (tx_queue, apif->tx_queues)
137 clib_spinlock_lock (&tx_queue->lockp);
138 u32 tx_block_sz = tx_queue->tx_req->req.tp_block_size;
139 u32 tx_frame_sz = tx_queue->tx_req->req.tp_frame_size;
140 u32 tx_frame_nr = tx_queue->tx_req->req.tp_frame_nr;
141 u32 tx_block_nr = tx_queue->tx_req->req.tp_block_nr;
143 int n_send_req = 0, n_avail = 0, n_sending = 0, n_tot = 0, n_wrong = 0;
144 u8 *tx_block_start = tx_queue->tx_ring[block];
145 u32 tx_frame = tx_queue->next_tx_frame;
146 tpacket3_hdr_t *tph3;
147 tpacket2_hdr_t *tph2;
149 s = format (s, "\n%UTX Queue %u:", format_white_space, indent,
151 s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
152 format_white_space, indent + 2, tx_block_sz, tx_block_nr,
153 tx_frame_sz, tx_frame_nr);
154 s = format (s, " next frame:%d", tx_queue->next_tx_frame);
155 if (apif->version & TPACKET_V3)
159 (tpacket3_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
160 tx_frame = (tx_frame + 1) % tx_frame_nr;
161 if (tph3->tp_status == 0)
163 else if (tph3->tp_status & TP_STATUS_SEND_REQUEST)
165 else if (tph3->tp_status & TP_STATUS_SENDING)
171 while (tx_frame != tx_queue->next_tx_frame);
176 (tpacket2_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
177 tx_frame = (tx_frame + 1) % tx_frame_nr;
178 if (tph2->tp_status == 0)
180 else if (tph2->tp_status & TP_STATUS_SEND_REQUEST)
182 else if (tph2->tp_status & TP_STATUS_SENDING)
188 while (tx_frame != tx_queue->next_tx_frame);
190 format (s, "\n%Uavailable:%d request:%d sending:%d wrong:%d total:%d",
191 format_white_space, indent + 2, n_avail, n_send_req, n_sending,
193 clib_spinlock_unlock (&tx_queue->lockp);
199 format_af_packet_tx_trace (u8 *s, va_list *va)
201 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
202 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
203 af_packet_tx_trace_t *t = va_arg (*va, af_packet_tx_trace_t *);
204 u32 indent = format_get_indent (s);
206 s = format (s, "af_packet: hw_if_index %u tx-queue %u", t->hw_if_index,
213 "\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
214 "\n%Usec 0x%x nsec 0x%x vlan %U"
215 #ifdef TP_STATUS_VLAN_TPID_VALID
219 format_white_space, indent + 2, format_white_space, indent + 4,
220 t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac,
221 t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec,
222 t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci
223 #ifdef TP_STATUS_VLAN_TPID_VALID
233 "\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
234 "\n%Usec 0x%x nsec 0x%x vlan %U"
235 #ifdef TP_STATUS_VLAN_TPID_VALID
239 format_white_space, indent + 2, format_white_space, indent + 4,
240 t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac,
241 t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec,
242 t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci
243 #ifdef TP_STATUS_VLAN_TPID_VALID
245 t->tph3.hv1.tp_vlan_tpid
250 "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u"
251 "\n%Ugso_size %u csum_start %u csum_offset %u",
252 format_white_space, indent + 2, format_white_space, indent + 4,
253 t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len,
254 format_white_space, indent + 4, t->vnet_hdr.gso_size,
255 t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset);
257 s = format (s, "\n%Ubuffer 0x%x:\n%U%U", format_white_space, indent + 2,
258 t->buffer_index, format_white_space, indent + 4,
259 format_vnet_buffer_no_chain, &t->buffer);
260 s = format (s, "\n%U%U", format_white_space, indent + 2,
261 format_ethernet_header_with_length, t->buffer.pre_data,
262 sizeof (t->buffer.pre_data));
267 af_packet_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
268 vlib_buffer_t *b0, u32 bi, void *tph,
269 vnet_virtio_net_hdr_t *vnet_hdr, u32 hw_if_index,
270 u16 queue_id, u8 is_v2)
272 af_packet_tx_trace_t *t;
273 t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
274 t->hw_if_index = hw_if_index;
275 t->queue_id = queue_id;
276 t->buffer_index = bi;
280 clib_memcpy_fast (&t->tph2, (tpacket2_hdr_t *) tph,
281 sizeof (tpacket2_hdr_t));
283 clib_memcpy_fast (&t->tph3, (tpacket3_hdr_t *) tph,
284 sizeof (tpacket3_hdr_t));
285 clib_memcpy_fast (&t->vnet_hdr, vnet_hdr, sizeof (*vnet_hdr));
286 clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data));
287 clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
288 sizeof (t->buffer.pre_data));
291 static_always_inline void
292 fill_gso_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
294 vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
295 i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
296 if (b0->flags & VNET_BUFFER_F_IS_IP4)
299 vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
300 vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
301 vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
302 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
303 vnet_hdr->csum_start = l4_hdr_offset; // 0x22;
304 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
305 ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
306 if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
307 ip4->checksum = ip4_header_checksum (ip4);
309 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
310 tcp->checksum = ip4_pseudo_header_cksum (ip4);
312 else if (b0->flags & VNET_BUFFER_F_IS_IP6)
315 vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
316 vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
317 vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
318 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
319 vnet_hdr->csum_start = l4_hdr_offset; // 0x36;
320 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
321 ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
323 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
324 tcp->checksum = ip6_pseudo_header_cksum (ip6);
328 static_always_inline void
329 fill_cksum_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
331 vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
332 i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
333 if (b0->flags & VNET_BUFFER_F_IS_IP4)
336 ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
337 if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
338 ip4->checksum = ip4_header_checksum (ip4);
339 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
340 vnet_hdr->csum_start = l4_hdr_offset;
341 if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
344 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
345 tcp->checksum = ip4_pseudo_header_cksum (ip4);
346 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
347 vnet_hdr->hdr_len = l4_hdr_offset + tcp_header_bytes (tcp);
349 else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
352 (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
353 udp->checksum = ip4_pseudo_header_cksum (ip4);
354 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
355 vnet_hdr->hdr_len = l4_hdr_offset + sizeof (udp_header_t);
358 else if (b0->flags & VNET_BUFFER_F_IS_IP6)
361 vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
362 vnet_hdr->csum_start = l4_hdr_offset;
363 ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
364 if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
367 (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
368 tcp->checksum = ip6_pseudo_header_cksum (ip6);
369 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
370 vnet_hdr->hdr_len = l4_hdr_offset + tcp_header_bytes (tcp);
372 else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
375 (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
376 udp->checksum = ip6_pseudo_header_cksum (ip6);
377 vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
378 vnet_hdr->hdr_len = l4_hdr_offset + sizeof (udp_header_t);
383 VNET_DEVICE_CLASS_TX_FN (af_packet_device_class) (vlib_main_t * vm,
384 vlib_node_runtime_t * node,
385 vlib_frame_t * frame)
387 af_packet_main_t *apm = &af_packet_main;
388 vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
389 u32 *buffers = vlib_frame_vector_args (frame);
390 u32 n_left = frame->n_vectors;
392 vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
393 af_packet_if_t *apif =
394 pool_elt_at_index (apm->interfaces, rd->dev_instance);
395 u16 queue_id = tf->queue_id;
396 af_packet_queue_t *tx_queue = vec_elt_at_index (apif->tx_queues, queue_id);
397 u32 block = 0, frame_size = 0, frame_num = 0, tx_frame = 0;
399 tpacket3_hdr_t *tph3 = 0;
400 tpacket2_hdr_t *tph2 = 0;
401 u32 frame_not_ready = 0;
402 u8 is_cksum_gso_enabled = (apif->is_cksum_gso_enabled == 1) ? 1 : 0;
403 u32 tpacket_align = 0;
404 u8 is_v2 = (apif->version == TPACKET_V2) ? 1 : 0;
406 if (tf->shared_queue)
407 clib_spinlock_lock (&tx_queue->lockp);
409 frame_size = tx_queue->tx_req->req.tp_frame_size;
410 frame_num = tx_queue->tx_req->req.tp_frame_nr;
411 block_start = tx_queue->tx_ring[block];
412 tx_frame = tx_queue->next_tx_frame;
415 tpacket_align = TPACKET_ALIGN (sizeof (tpacket2_hdr_t));
419 vnet_virtio_net_hdr_t *vnet_hdr = 0;
421 vlib_buffer_t *b0 = 0, *b0_first = 0;
424 bi = bi_first = buffers[0];
428 tph2 = (tpacket2_hdr_t *) (block_start + tx_frame * frame_size);
429 if (PREDICT_FALSE (tph2->tp_status &
430 (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
436 b0_first = b0 = vlib_get_buffer (vm, bi);
438 if (PREDICT_TRUE (is_cksum_gso_enabled))
441 (vnet_virtio_net_hdr_t *) ((u8 *) tph2 + tpacket_align);
443 clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
444 offset = sizeof (vnet_virtio_net_hdr_t);
446 if (b0->flags & VNET_BUFFER_F_GSO)
447 fill_gso_offload (b0, vnet_hdr);
448 else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
449 fill_cksum_offload (b0, vnet_hdr);
452 len = b0->current_length;
453 clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
454 vlib_buffer_get_current (b0), len);
457 while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
459 b0 = vlib_get_buffer (vm, b0->next_buffer);
460 len = b0->current_length;
461 clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
462 vlib_buffer_get_current (b0), len);
466 tph2->tp_len = tph2->tp_snaplen = offset;
467 tph2->tp_status = TP_STATUS_SEND_REQUEST;
470 if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
472 if (PREDICT_TRUE (is_cksum_gso_enabled))
473 af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
474 vnet_hdr, apif->hw_if_index, queue_id, 1);
477 vnet_virtio_net_hdr_t vnet_hdr2 = {};
478 af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
479 &vnet_hdr2, apif->hw_if_index, queue_id,
483 tx_frame = (tx_frame + 1) % frame_num;
486 /* check if we've exhausted the ring */
487 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
493 tpacket_align = TPACKET_ALIGN (sizeof (tpacket3_hdr_t));
498 vnet_virtio_net_hdr_t *vnet_hdr = 0;
500 vlib_buffer_t *b0 = 0, *b0_first = 0;
503 bi = bi_first = buffers[0];
507 tph3 = (tpacket3_hdr_t *) (block_start + tx_frame * frame_size);
508 if (PREDICT_FALSE (tph3->tp_status &
509 (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
515 b0_first = b0 = vlib_get_buffer (vm, bi);
517 if (PREDICT_TRUE (is_cksum_gso_enabled))
520 (vnet_virtio_net_hdr_t *) ((u8 *) tph3 + tpacket_align);
522 clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
523 offset = sizeof (vnet_virtio_net_hdr_t);
525 if (b0->flags & VNET_BUFFER_F_GSO)
526 fill_gso_offload (b0, vnet_hdr);
527 else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
528 fill_cksum_offload (b0, vnet_hdr);
531 len = b0->current_length;
532 clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
533 vlib_buffer_get_current (b0), len);
536 while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
538 b0 = vlib_get_buffer (vm, b0->next_buffer);
539 len = b0->current_length;
540 clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
541 vlib_buffer_get_current (b0), len);
545 tph3->tp_len = tph3->tp_snaplen = offset;
546 tph3->tp_status = TP_STATUS_SEND_REQUEST;
549 if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
551 if (PREDICT_TRUE (is_cksum_gso_enabled))
552 af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
553 vnet_hdr, apif->hw_if_index, queue_id, 0);
556 vnet_virtio_net_hdr_t vnet_hdr2 = {};
557 af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
558 &vnet_hdr2, apif->hw_if_index, queue_id,
562 tx_frame = (tx_frame + 1) % frame_num;
565 /* check if we've exhausted the ring */
566 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
570 CLIB_MEMORY_BARRIER ();
572 if (PREDICT_TRUE (n_sent || tx_queue->is_tx_pending))
574 tx_queue->next_tx_frame = tx_frame;
575 tx_queue->is_tx_pending = 0;
578 sendto (tx_queue->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1))
580 /* Uh-oh, drop & move on, but count whether it was fatal or not.
581 * Note that we have no reliable way to properly determine the
582 * disposition of the packets we just enqueued for delivery.
586 if (unix_error_is_fatal (errno))
588 counter = AF_PACKET_TX_ERROR_TXRING_FATAL;
592 counter = AF_PACKET_TX_ERROR_TXRING_EAGAIN;
593 /* non-fatal error: kick again next time
594 * note that you could still end up in a deadlock: if you do not
595 * try to send new packets (ie reschedule this tx node), eg.
596 * because your peer is waiting for the unsent packets to reply
597 * to you but your waiting for its reply etc., you are not going
598 * to kick again, and everybody is waiting for the other to talk
600 tx_queue->is_tx_pending = 1;
603 vlib_error_count (vm, node->node_index, counter, 1);
607 if (tf->shared_queue)
608 clib_spinlock_unlock (&tx_queue->lockp);
610 if (PREDICT_FALSE (frame_not_ready))
611 vlib_error_count (vm, node->node_index,
612 AF_PACKET_TX_ERROR_FRAME_NOT_READY, frame_not_ready);
614 if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
615 vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN,
618 vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
619 return frame->n_vectors;
623 af_packet_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
626 af_packet_main_t *apm = &af_packet_main;
627 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
628 af_packet_if_t *apif =
629 pool_elt_at_index (apm->interfaces, hw->dev_instance);
631 /* Shut off redirection */
632 if (node_index == ~0)
634 apif->per_interface_next_index = node_index;
638 apif->per_interface_next_index =
639 vlib_node_add_next (vlib_get_main (), af_packet_input_node.index,
644 af_packet_clear_hw_interface_counters (u32 instance)
646 /* Nothing for now */
649 static clib_error_t *
650 af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
653 af_packet_main_t *apm = &af_packet_main;
654 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
655 af_packet_if_t *apif =
656 pool_elt_at_index (apm->interfaces, hw->dev_instance);
659 if (apif->host_if_index < 0)
660 return 0; /* no error */
662 apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
664 if (apif->is_admin_up)
666 hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
667 vnet_netlink_set_link_state (apif->host_if_index, 1);
672 vnet_netlink_set_link_state (apif->host_if_index, 0);
675 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
677 return 0; /* no error */
680 static clib_error_t *
681 af_packet_subif_add_del_function (vnet_main_t * vnm,
683 struct vnet_sw_interface_t *st, int is_add)
685 /* Nothing for now */
689 static clib_error_t *af_packet_set_mac_address_function
690 (struct vnet_hw_interface_t *hi, const u8 * old_address, const u8 * address)
692 af_packet_main_t *apm = &af_packet_main;
693 af_packet_if_t *apif =
694 pool_elt_at_index (apm->interfaces, hi->dev_instance);
698 if (apif->mode == AF_PACKET_IF_MODE_IP)
700 vlib_log_warn (apm->log_class, "af_packet_%s interface is in IP mode",
702 return clib_error_return (0,
703 " MAC update failed, interface is in IP mode");
706 fd = socket (AF_UNIX, SOCK_DGRAM, 0);
709 vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
714 /* if interface is a bridge ignore */
715 if (apif->host_if_index < 0)
716 goto error; /* no error */
718 /* use host_if_index in case host name has changed */
719 ifr.ifr_ifindex = apif->host_if_index;
720 if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
724 "af_packet_%s ioctl could not retrieve eth name, error: %d",
725 apif->host_if_name, rv);
729 clib_memcpy (ifr.ifr_hwaddr.sa_data, address, 6);
730 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
732 if ((rv = ioctl (fd, SIOCSIFHWADDR, &ifr)) < 0)
734 vlib_log_warn (apm->log_class,
735 "af_packet_%s ioctl could not set mac, error: %d",
736 apif->host_if_name, rv);
745 return 0; /* no error */
748 static clib_error_t *
749 af_packet_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
750 vnet_hw_if_rx_mode mode)
752 af_packet_main_t *apm = &af_packet_main;
753 vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
754 af_packet_if_t *apif;
756 apif = vec_elt_at_index (apm->interfaces, hw->dev_instance);
758 if (mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
760 vlib_log_err (apm->log_class,
761 "af_packet_%s adaptive mode is not supported",
763 return clib_error_return (
764 0, "af_packet_%s adaptive mode is not supported", apif->host_if_name);
767 af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, qid);
769 if (rx_queue->mode != mode)
771 rx_queue->mode = mode;
773 if (mode == VNET_HW_IF_RX_MODE_POLLING)
774 apm->polling_count++;
775 else if (mode == VNET_HW_IF_RX_MODE_INTERRUPT && apm->polling_count > 0)
776 apm->polling_count--;
782 VNET_DEVICE_CLASS (af_packet_device_class) = {
784 .format_device_name = format_af_packet_device_name,
785 .format_device = format_af_packet_device,
786 .format_tx_trace = format_af_packet_tx_trace,
787 .tx_function_n_errors = AF_PACKET_TX_N_ERROR,
788 .tx_function_error_strings = af_packet_tx_func_error_strings,
789 .rx_redirect_to_node = af_packet_set_interface_next_node,
790 .clear_counters = af_packet_clear_hw_interface_counters,
791 .admin_up_down_function = af_packet_interface_admin_up_down,
792 .subif_add_del_function = af_packet_subif_add_del_function,
793 .mac_addr_change_function = af_packet_set_mac_address_function,
794 .rx_mode_change_function = af_packet_interface_rx_mode_change,
798 * fd.io coding-style-patch-verification: ON
801 * eval: (c-set-style "gnu")