af_packet: move to plugin

Type: improvement

Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Change-Id: I3ec857adb3a9e8a778072a202a4d23f4101e83b2

1 files changed, 0 insertions, 845 deletions

diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c
deleted file mode 100644
index 724924f5f4b..00000000000
--- a/src/vnet/devices/af_packet/node.c
+++ /dev/null
@@ -1,845 +0,0 @@
-/*
- *------------------------------------------------------------------
- * af_packet.c - linux kernel packet interface
- *
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *------------------------------------------------------------------
- */
-
-#include <linux/if_packet.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vnet/ip/ip.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/interface/rx_queue_funcs.h>
-#include <vnet/feature/feature.h>
-#include <vnet/ethernet/packet.h>
-
-#include <vnet/devices/af_packet/af_packet.h>
-#include <vnet/devices/virtio/virtio_std.h>
-
-#define foreach_af_packet_input_error                                         \
-  _ (PARTIAL_PKT, "partial packet")                                           \
-  _ (TIMEDOUT_BLK, "timed out block")                                         \
-  _ (TOTAL_RECV_BLK, "total received block")
-typedef enum
-{
-#define _(f,s) AF_PACKET_INPUT_ERROR_##f,
-  foreach_af_packet_input_error
-#undef _
-    AF_PACKET_INPUT_N_ERROR,
-} af_packet_input_error_t;
-
-static char *af_packet_input_error_strings[] = {
-#define _(n,s) s,
-  foreach_af_packet_input_error
-#undef _
-};
-
-typedef struct
-{
-  u32 next_index;
-  u32 hw_if_index;
-  u16 queue_id;
-  int block;
-  u32 pkt_num;
-  void *block_start;
-  block_desc_t bd;
-  union
-  {
-    tpacket3_hdr_t tph3;
-    tpacket2_hdr_t tph2;
-  };
-  vnet_virtio_net_hdr_t vnet_hdr;
-  u8 is_v3;
-} af_packet_input_trace_t;
-
-static u8 *
-format_af_packet_input_trace (u8 * s, va_list * args)
-{
-  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
-  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
-  af_packet_input_trace_t *t = va_arg (*args, af_packet_input_trace_t *);
-  u32 indent = format_get_indent (s);
-
-  s = format (s, "af_packet: hw_if_index %d rx-queue %u next-index %d",
-	      t->hw_if_index, t->queue_id, t->next_index);
-
-  if (t->is_v3)
-    {
-      s = format (
-	s, "\n%Ublock %u:\n%Uaddress %p version %u seq_num %lu pkt_num %u",
-	format_white_space, indent + 2, t->block, format_white_space,
-	indent + 4, t->block_start, t->bd.version, t->bd.hdr.bh1.seq_num,
-	t->pkt_num);
-      s = format (
-	s,
-	"\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
-	"\n%Usec 0x%x nsec 0x%x vlan %U"
-#ifdef TP_STATUS_VLAN_TPID_VALID
-	" vlan_tpid %u"
-#endif
-	,
-	format_white_space, indent + 2, format_white_space, indent + 4,
-	t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac,
-	t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec,
-	t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci
-#ifdef TP_STATUS_VLAN_TPID_VALID
-	,
-	t->tph3.hv1.tp_vlan_tpid
-#endif
-      );
-    }
-  else
-    {
-      s = format (
-	s,
-	"\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
-	"\n%Usec 0x%x nsec 0x%x vlan %U"
-#ifdef TP_STATUS_VLAN_TPID_VALID
-	" vlan_tpid %u"
-#endif
-	,
-	format_white_space, indent + 2, format_white_space, indent + 4,
-	t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac,
-	t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec,
-	t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci
-#ifdef TP_STATUS_VLAN_TPID_VALID
-	,
-	t->tph2.tp_vlan_tpid
-#endif
-      );
-    }
-
-  s = format (s,
-	      "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u"
-	      "\n%Ugso_size %u csum_start %u csum_offset %u",
-	      format_white_space, indent + 2, format_white_space, indent + 4,
-	      t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len,
-	      format_white_space, indent + 4, t->vnet_hdr.gso_size,
-	      t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset);
-  return s;
-}
-
-always_inline void
-buffer_add_to_chain (vlib_buffer_t *b, vlib_buffer_t *first_b,
-		     vlib_buffer_t *prev_b, u32 bi)
-{
-  /* update first buffer */
-  first_b->total_length_not_including_first_buffer += b->current_length;
-
-  /* update previous buffer */
-  prev_b->next_buffer = bi;
-  prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
-
-  /* update current buffer */
-  b->next_buffer = ~0;
-}
-
-static_always_inline void
-fill_gso_offload (vlib_buffer_t *b, u32 gso_size, u8 l4_hdr_sz)
-{
-  b->flags |= VNET_BUFFER_F_GSO;
-  vnet_buffer2 (b)->gso_size = gso_size;
-  vnet_buffer2 (b)->gso_l4_hdr_sz = l4_hdr_sz;
-}
-
-static_always_inline void
-fill_cksum_offload (vlib_buffer_t *b, u8 *l4_hdr_sz, u8 is_ip)
-{
-  vnet_buffer_oflags_t oflags = 0;
-  u16 l2hdr_sz = 0;
-  u16 ethertype = 0;
-  u8 l4_proto = 0;
-
-  if (is_ip)
-    {
-      switch (b->data[0] & 0xf0)
-	{
-	case 0x40:
-	  ethertype = ETHERNET_TYPE_IP4;
-	  break;
-	case 0x60:
-	  ethertype = ETHERNET_TYPE_IP6;
-	  break;
-	}
-    }
-  else
-    {
-      ethernet_header_t *eth = (ethernet_header_t *) b->data;
-      ethertype = clib_net_to_host_u16 (eth->type);
-      l2hdr_sz = sizeof (ethernet_header_t);
-      if (ethernet_frame_is_tagged (ethertype))
-	{
-	  ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eth + 1);
-
-	  ethertype = clib_net_to_host_u16 (vlan->type);
-	  l2hdr_sz += sizeof (*vlan);
-	  if (ethertype == ETHERNET_TYPE_VLAN)
-	    {
-	      vlan++;
-	      ethertype = clib_net_to_host_u16 (vlan->type);
-	      l2hdr_sz += sizeof (*vlan);
-	    }
-	}
-    }
-
-  vnet_buffer (b)->l2_hdr_offset = 0;
-  vnet_buffer (b)->l3_hdr_offset = l2hdr_sz;
-
-  if (ethertype == ETHERNET_TYPE_IP4)
-    {
-      ip4_header_t *ip4 = (ip4_header_t *) (b->data + l2hdr_sz);
-      vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
-      b->flags |= (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
-		   VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
-		   VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
-
-      l4_proto = ip4->protocol;
-    }
-  else if (ethertype == ETHERNET_TYPE_IP6)
-    {
-      ip6_header_t *ip6 = (ip6_header_t *) (b->data + l2hdr_sz);
-      b->flags |= (VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
-		   VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
-		   VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
-      u16 ip6_hdr_len = sizeof (ip6_header_t);
-
-      if (ip6_ext_hdr (ip6->protocol))
-	{
-	  ip6_ext_header_t *p = (void *) (ip6 + 1);
-	  ip6_hdr_len += ip6_ext_header_len (p);
-	  while (ip6_ext_hdr (p->next_hdr))
-	    {
-	      ip6_hdr_len += ip6_ext_header_len (p);
-	      p = ip6_ext_next_header (p);
-	    }
-	  l4_proto = p->next_hdr;
-	}
-      else
-	l4_proto = ip6->protocol;
-      vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip6_hdr_len;
-    }
-
-  if (l4_proto == IP_PROTOCOL_TCP)
-    {
-      oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
-      tcp_header_t *tcp =
-	(tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
-      *l4_hdr_sz = tcp_header_bytes (tcp);
-    }
-  else if (l4_proto == IP_PROTOCOL_UDP)
-    {
-      oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
-      *l4_hdr_sz = sizeof (udp_header_t);
-    }
-
-  if (oflags)
-    vnet_buffer_offload_flags_set (b, oflags);
-}
-
-always_inline uword
-af_packet_v3_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
-			      vlib_frame_t *frame, af_packet_if_t *apif,
-			      u16 queue_id, u8 is_cksum_gso_enabled)
-{
-  af_packet_main_t *apm = &af_packet_main;
-  af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id);
-  tpacket3_hdr_t *tph;
-  u32 next_index;
-  u32 n_free_bufs;
-  u32 n_rx_packets = 0;
-  u32 n_rx_bytes = 0;
-  u32 timedout_blk = 0;
-  u32 total = 0;
-  u32 *to_next = 0;
-  u32 block = rx_queue->next_rx_block;
-  u32 block_nr = rx_queue->rx_req->req3.tp_block_nr;
-  u8 *block_start = 0;
-  uword n_trace = vlib_get_trace_count (vm, node);
-  u32 thread_index = vm->thread_index;
-  u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
-  u32 min_bufs = rx_queue->rx_req->req3.tp_frame_size / n_buffer_bytes;
-  u32 num_pkts = 0;
-  u32 rx_frame_offset = 0;
-  block_desc_t *bd = 0;
-  vlib_buffer_t bt = {};
-  u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP);
-
-  if (is_ip)
-    next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
-  else
-    {
-      next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
-      if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
-	next_index = apif->per_interface_next_index;
-
-      /* redirect if feature path enabled */
-      vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt);
-    }
-
-  if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block]))
-	 ->hdr.bh1.block_status &
-       TP_STATUS_USER) != 0)
-    {
-      u32 n_required = 0;
-      bd = (block_desc_t *) block_start;
-
-      if (PREDICT_FALSE (rx_queue->is_rx_pending))
-	{
-	  num_pkts = rx_queue->num_rx_pkts;
-	  rx_frame_offset = rx_queue->rx_frame_offset;
-	  rx_queue->is_rx_pending = 0;
-	}
-      else
-	{
-	  num_pkts = bd->hdr.bh1.num_pkts;
-	  rx_frame_offset = sizeof (block_desc_t);
-	  total++;
-
-	  if (TP_STATUS_BLK_TMO & bd->hdr.bh1.block_status)
-	    timedout_blk++;
-	}
-
-      n_required = clib_max (num_pkts, VLIB_FRAME_SIZE);
-      n_free_bufs = vec_len (apm->rx_buffers[thread_index]);
-      if (PREDICT_FALSE (n_free_bufs < n_required))
-	{
-	  vec_validate (apm->rx_buffers[thread_index],
-			n_required + n_free_bufs - 1);
-	  n_free_bufs += vlib_buffer_alloc (
-	    vm, &apm->rx_buffers[thread_index][n_free_bufs], n_required);
-	  vec_set_len (apm->rx_buffers[thread_index], n_free_bufs);
-	}
-
-      while (num_pkts && (n_free_bufs >= min_bufs))
-	{
-	  u32 next0 = next_index;
-	  u32 n_left_to_next;
-
-	  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
-	  while (num_pkts && n_left_to_next && (n_free_bufs >= min_bufs))
-	    {
-	      tph = (tpacket3_hdr_t *) (block_start + rx_frame_offset);
-
-	      if (num_pkts > 1)
-		CLIB_PREFETCH (block_start + rx_frame_offset +
-				 tph->tp_next_offset,
-			       2 * CLIB_CACHE_LINE_BYTES, LOAD);
-
-	      vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0;
-	      vnet_virtio_net_hdr_t *vnet_hdr = 0;
-	      u32 data_len = tph->tp_snaplen;
-	      u32 offset = 0;
-	      u32 bi0 = ~0, first_bi0 = ~0;
-	      u8 l4_hdr_sz = 0;
-
-	      if (is_cksum_gso_enabled)
-		vnet_hdr =
-		  (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac -
-					     sizeof (vnet_virtio_net_hdr_t));
-
-	      // save current state and return
-	      if (PREDICT_FALSE (((data_len / n_buffer_bytes) + 1) >
-				 vec_len (apm->rx_buffers[thread_index])))
-		{
-		  rx_queue->rx_frame_offset = rx_frame_offset;
-		  rx_queue->num_rx_pkts = num_pkts;
-		  rx_queue->is_rx_pending = 1;
-		  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-		  goto done;
-		}
-
-	      while (data_len)
-		{
-		  /* grab free buffer */
-		  u32 last_empty_buffer =
-		    vec_len (apm->rx_buffers[thread_index]) - 1;
-		  bi0 = apm->rx_buffers[thread_index][last_empty_buffer];
-		  vec_set_len (apm->rx_buffers[thread_index],
-			       last_empty_buffer);
-		  n_free_bufs--;
-
-		  /* copy data */
-		  u32 bytes_to_copy =
-		    data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
-		  u32 vlan_len = 0;
-		  u32 bytes_copied = 0;
-
-		  b0 = vlib_get_buffer (vm, bi0);
-		  b0->current_data = 0;
-
-		  /* Kernel removes VLAN headers, so reconstruct VLAN */
-		  if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID))
-		    {
-		      if (PREDICT_TRUE (offset == 0))
-			{
-			  clib_memcpy_fast (vlib_buffer_get_current (b0),
-					    (u8 *) tph + tph->tp_mac,
-					    sizeof (ethernet_header_t));
-			  ethernet_header_t *eth =
-			    vlib_buffer_get_current (b0);
-			  ethernet_vlan_header_t *vlan =
-			    (ethernet_vlan_header_t *) (eth + 1);
-			  vlan->priority_cfi_and_id =
-			    clib_host_to_net_u16 (tph->hv1.tp_vlan_tci);
-			  vlan->type = eth->type;
-			  eth->type =
-			    clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
-			  vlan_len = sizeof (ethernet_vlan_header_t);
-			  bytes_copied = sizeof (ethernet_header_t);
-			}
-		    }
-		  clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) +
-				      bytes_copied + vlan_len,
-				    (u8 *) tph + tph->tp_mac + offset +
-				      bytes_copied,
-				    (bytes_to_copy - bytes_copied));
-
-		  /* fill buffer header */
-		  b0->current_length = bytes_to_copy + vlan_len;
-
-		  if (offset == 0)
-		    {
-		      b0->total_length_not_including_first_buffer = 0;
-		      b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
-		      vnet_buffer (b0)->sw_if_index[VLIB_RX] =
-			apif->sw_if_index;
-		      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0;
-		      first_b0 = b0;
-		      first_bi0 = bi0;
-		      if (is_cksum_gso_enabled)
-			{
-			  if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
-			    fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip);
-			  if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 |
-						    VIRTIO_NET_HDR_GSO_TCPV6))
-			    fill_gso_offload (first_b0, vnet_hdr->gso_size,
-					      l4_hdr_sz);
-			}
-		    }
-		  else
-		    buffer_add_to_chain (b0, first_b0, prev_b0, bi0);
-
-		  prev_b0 = b0;
-		  offset += bytes_to_copy;
-		  data_len -= bytes_to_copy;
-		}
-	      n_rx_packets++;
-	      n_rx_bytes += tph->tp_snaplen;
-	      to_next[0] = first_bi0;
-	      to_next += 1;
-	      n_left_to_next--;
-
-	      /* drop partial packets */
-	      if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen))
-		{
-		  next0 = VNET_DEVICE_INPUT_NEXT_DROP;
-		  first_b0->error =
-		    node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT];
-		}
-	      else
-		{
-		  if (PREDICT_FALSE (apif->mode == AF_PACKET_IF_MODE_IP))
-		    {
-		      switch (first_b0->data[0] & 0xf0)
-			{
-			case 0x40:
-			  next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
-			  break;
-			case 0x60:
-			  next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
-			  break;
-			default:
-			  next0 = VNET_DEVICE_INPUT_NEXT_DROP;
-			  break;
-			}
-		      if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
-			next0 = apif->per_interface_next_index;
-		    }
-		  else
-		    {
-		      /* copy feature arc data from template */
-		      first_b0->current_config_index = bt.current_config_index;
-		      vnet_buffer (first_b0)->feature_arc_index =
-			vnet_buffer (&bt)->feature_arc_index;
-		    }
-		}
-
-	      /* trace */
-	      if (PREDICT_FALSE (n_trace > 0 &&
-				 vlib_trace_buffer (vm, node, next0, first_b0,
-						    /* follow_chain */ 0)))
-		{
-		  af_packet_input_trace_t *tr;
-		  vlib_set_trace_count (vm, node, --n_trace);
-		  tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
-		  tr->is_v3 = 1;
-		  tr->next_index = next0;
-		  tr->hw_if_index = apif->hw_if_index;
-		  tr->queue_id = queue_id;
-		  tr->block = block;
-		  tr->block_start = bd;
-		  tr->pkt_num = bd->hdr.bh1.num_pkts - num_pkts;
-		  clib_memcpy_fast (&tr->bd, bd, sizeof (block_desc_t));
-		  clib_memcpy_fast (&tr->tph3, tph, sizeof (tpacket3_hdr_t));
-		  if (is_cksum_gso_enabled)
-		    clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr,
-				      sizeof (vnet_virtio_net_hdr_t));
-		  else
-		    clib_memset_u8 (&tr->vnet_hdr, 0,
-				    sizeof (vnet_virtio_net_hdr_t));
-		}
-
-	      /* enque and take next packet */
-	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-					       n_left_to_next, first_bi0,
-					       next0);
-
-	      /* next packet */
-	      num_pkts--;
-	      rx_frame_offset += tph->tp_next_offset;
-	    }
-
-	  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-	}
-
-      if (PREDICT_TRUE (num_pkts == 0))
-	{
-	  bd->hdr.bh1.block_status = TP_STATUS_KERNEL;
-	  block = (block + 1) % block_nr;
-	}
-      else
-	{
-	  rx_queue->rx_frame_offset = rx_frame_offset;
-	  rx_queue->num_rx_pkts = num_pkts;
-	  rx_queue->is_rx_pending = 1;
-	}
-    }
-
-  rx_queue->next_rx_block = block;
-
-done:
-
-  if (apm->polling_count == 0)
-    {
-      if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block]))
-	     ->hdr.bh1.block_status &
-	   TP_STATUS_USER) != 0)
-	vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_POLLING);
-      else
-	vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_INTERRUPT);
-    }
-
-  vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TOTAL_RECV_BLK,
-		    total);
-  vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TIMEDOUT_BLK,
-		    timedout_blk);
-
-  vlib_increment_combined_counter
-    (vnet_get_main ()->interface_main.combined_sw_if_counters
-     + VNET_INTERFACE_COUNTER_RX,
-     vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
-
-  vnet_device_increment_rx_packets (thread_index, n_rx_packets);
-  return n_rx_packets;
-}
-
-always_inline uword
-af_packet_v2_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
-			      vlib_frame_t *frame, af_packet_if_t *apif,
-			      u16 queue_id, u8 is_cksum_gso_enabled)
-{
-  af_packet_main_t *apm = &af_packet_main;
-  af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id);
-  tpacket2_hdr_t *tph;
-  u32 next_index;
-  u32 block = 0;
-  u32 rx_frame;
-  u32 n_free_bufs;
-  u32 n_rx_packets = 0;
-  u32 n_rx_bytes = 0;
-  u32 *to_next = 0;
-  u32 frame_size = rx_queue->rx_req->req.tp_frame_size;
-  u32 frame_num = rx_queue->rx_req->req.tp_frame_nr;
-  u8 *block_start = rx_queue->rx_ring[block];
-  uword n_trace = vlib_get_trace_count (vm, node);
-  u32 thread_index = vm->thread_index;
-  u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
-  u32 min_bufs = rx_queue->rx_req->req.tp_frame_size / n_buffer_bytes;
-  u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP);
-  vlib_buffer_t bt = {};
-
-  if (is_ip)
-    {
-      next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
-    }
-  else
-    {
-      next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
-      if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
-	next_index = apif->per_interface_next_index;
-
-      /* redirect if feature path enabled */
-      vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt);
-    }
-
-  n_free_bufs = vec_len (apm->rx_buffers[thread_index]);
-  if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE))
-    {
-      vec_validate (apm->rx_buffers[thread_index],
-		    VLIB_FRAME_SIZE + n_free_bufs - 1);
-      n_free_bufs += vlib_buffer_alloc (
-	vm, &apm->rx_buffers[thread_index][n_free_bufs], VLIB_FRAME_SIZE);
-      vec_set_len (apm->rx_buffers[thread_index], n_free_bufs);
-    }
-
-  rx_frame = rx_queue->next_rx_frame;
-  tph = (tpacket2_hdr_t *) (block_start + rx_frame * frame_size);
-  while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs))
-    {
-      vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0;
-      u32 next0 = next_index;
-
-      u32 n_left_to_next;
-      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-      while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs) &&
-	     n_left_to_next)
-	{
-	  vnet_virtio_net_hdr_t *vnet_hdr = 0;
-	  u32 data_len = tph->tp_snaplen;
-	  u32 offset = 0;
-	  u32 bi0 = 0, first_bi0 = 0;
-	  u8 l4_hdr_sz = 0;
-
-	  if (is_cksum_gso_enabled)
-	    vnet_hdr =
-	      (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac -
-					 sizeof (vnet_virtio_net_hdr_t));
-	  while (data_len)
-	    {
-	      /* grab free buffer */
-	      u32 last_empty_buffer =
-		vec_len (apm->rx_buffers[thread_index]) - 1;
-	      bi0 = apm->rx_buffers[thread_index][last_empty_buffer];
-	      b0 = vlib_get_buffer (vm, bi0);
-	      vec_set_len (apm->rx_buffers[thread_index], last_empty_buffer);
-	      n_free_bufs--;
-
-	      /* copy data */
-	      u32 bytes_to_copy =
-		data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
-	      u32 vlan_len = 0;
-	      u32 bytes_copied = 0;
-	      b0->current_data = 0;
-	      /* Kernel removes VLAN headers, so reconstruct VLAN */
-	      if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID))
-		{
-		  if (PREDICT_TRUE (offset == 0))
-		    {
-		      clib_memcpy_fast (vlib_buffer_get_current (b0),
-					(u8 *) tph + tph->tp_mac,
-					sizeof (ethernet_header_t));
-		      ethernet_header_t *eth = vlib_buffer_get_current (b0);
-		      ethernet_vlan_header_t *vlan =
-			(ethernet_vlan_header_t *) (eth + 1);
-		      vlan->priority_cfi_and_id =
-			clib_host_to_net_u16 (tph->tp_vlan_tci);
-		      vlan->type = eth->type;
-		      eth->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
-		      vlan_len = sizeof (ethernet_vlan_header_t);
-		      bytes_copied = sizeof (ethernet_header_t);
-		    }
-		}
-	      clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) +
-				  bytes_copied + vlan_len,
-				(u8 *) tph + tph->tp_mac + offset +
-				  bytes_copied,
-				(bytes_to_copy - bytes_copied));
-
-	      /* fill buffer header */
-	      b0->current_length = bytes_to_copy + vlan_len;
-
-	      if (offset == 0)
-		{
-		  b0->total_length_not_including_first_buffer = 0;
-		  b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
-		  vnet_buffer (b0)->sw_if_index[VLIB_RX] = apif->sw_if_index;
-		  vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0;
-		  first_bi0 = bi0;
-		  first_b0 = vlib_get_buffer (vm, first_bi0);
-
-		  if (is_cksum_gso_enabled)
-		    {
-		      if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
-			fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip);
-		      if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 |
-						VIRTIO_NET_HDR_GSO_TCPV6))
-			fill_gso_offload (first_b0, vnet_hdr->gso_size,
-					  l4_hdr_sz);
-		    }
-		}
-	      else
-		buffer_add_to_chain (b0, first_b0, prev_b0, bi0);
-
-	      prev_b0 = b0;
-	      offset += bytes_to_copy;
-	      data_len -= bytes_to_copy;
-	    }
-	  n_rx_packets++;
-	  n_rx_bytes += tph->tp_snaplen;
-	  to_next[0] = first_bi0;
-	  to_next += 1;
-	  n_left_to_next--;
-
-	  /* drop partial packets */
-	  if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen))
-	    {
-	      next0 = VNET_DEVICE_INPUT_NEXT_DROP;
-	      first_b0->error =
-		node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT];
-	    }
-	  else
-	    {
-	      if (PREDICT_FALSE (is_ip))
-		{
-		  switch (first_b0->data[0] & 0xf0)
-		    {
-		    case 0x40:
-		      next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
-		      break;
-		    case 0x60:
-		      next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
-		      break;
-		    default:
-		      next0 = VNET_DEVICE_INPUT_NEXT_DROP;
-		      break;
-		    }
-		  if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
-		    next0 = apif->per_interface_next_index;
-		}
-	      else
-		{
-		  /* copy feature arc data from template */
-		  first_b0->current_config_index = bt.current_config_index;
-		  vnet_buffer (first_b0)->feature_arc_index =
-		    vnet_buffer (&bt)->feature_arc_index;
-		}
-	    }
-
-	  /* trace */
-	  if (PREDICT_FALSE (n_trace > 0 &&
-			     vlib_trace_buffer (vm, node, next0, first_b0,
-						/* follow_chain */ 0)))
-	    {
-	      af_packet_input_trace_t *tr;
-	      vlib_set_trace_count (vm, node, --n_trace);
-	      tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
-	      tr->is_v3 = 0;
-	      tr->next_index = next0;
-	      tr->hw_if_index = apif->hw_if_index;
-	      tr->queue_id = queue_id;
-	      clib_memcpy_fast (&tr->tph2, tph, sizeof (struct tpacket2_hdr));
-	      if (is_cksum_gso_enabled)
-		clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr,
-				  sizeof (vnet_virtio_net_hdr_t));
-	      else
-		clib_memset_u8 (&tr->vnet_hdr, 0,
-				sizeof (vnet_virtio_net_hdr_t));
-	    }
-
-	  /* enque and take next packet */
-	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
-					   n_left_to_next, first_bi0, next0);
-
-	  /* next packet */
-	  tph->tp_status = TP_STATUS_KERNEL;
-	  rx_frame = (rx_frame + 1) % frame_num;
-	  tph = (struct tpacket2_hdr *) (block_start + rx_frame * frame_size);
-	}
-
-      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
-    }
-
-  rx_queue->next_rx_frame = rx_frame;
-
-  vlib_increment_combined_counter (
-    vnet_get_main ()->interface_main.combined_sw_if_counters +
-      VNET_INTERFACE_COUNTER_RX,
-    vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
-
-  vnet_device_increment_rx_packets (thread_index, n_rx_packets);
-  return n_rx_packets;
-}
-
-always_inline uword
-af_packet_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
-			   vlib_frame_t *frame, af_packet_if_t *apif,
-			   u16 queue_id, u8 is_cksum_gso_enabled)
-
-{
-  if (apif->version == TPACKET_V3)
-    return af_packet_v3_device_input_fn (vm, node, frame, apif, queue_id,
-					 is_cksum_gso_enabled);
-  else
-    return af_packet_v2_device_input_fn (vm, node, frame, apif, queue_id,
-					 is_cksum_gso_enabled);
-}
-
-VLIB_NODE_FN (af_packet_input_node) (vlib_main_t * vm,
-				     vlib_node_runtime_t * node,
-				     vlib_frame_t * frame)
-{
-  u32 n_rx_packets = 0;
-  af_packet_main_t *apm = &af_packet_main;
-  vnet_hw_if_rxq_poll_vector_t *pv;
-  pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
-  for (int i = 0; i < vec_len (pv); i++)
-    {
-      af_packet_if_t *apif;
-      apif = vec_elt_at_index (apm->interfaces, pv[i].dev_instance);
-      if (apif->is_admin_up)
-	{
-	  if (apif->is_cksum_gso_enabled)
-	    n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif,
-						       pv[i].queue_id, 1);
-	  else
-	    n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif,
-						       pv[i].queue_id, 0);
-	}
-    }
-  return n_rx_packets;
-}
-
-VLIB_REGISTER_NODE (af_packet_input_node) = {
-  .name = "af-packet-input",
-  .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
-  .sibling_of = "device-input",
-  .format_trace = format_af_packet_input_trace,
-  .type = VLIB_NODE_TYPE_INPUT,
-  .state = VLIB_NODE_STATE_INTERRUPT,
-  .n_errors = AF_PACKET_INPUT_N_ERROR,
-  .error_strings = af_packet_input_error_strings,
-};
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */