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/*
* l2_bvi.c : layer 2 Bridged Virtual Interface
*
* Copyright (c) 2013 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 <vnet/l2/l2_bvi.h>
/**
* send packets to l2-input.
*/
VNET_DEVICE_CLASS_TX_FN (bvi_device_class) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE];
u32 n_left, *from;
n_left = frame->n_vectors;
from = vlib_frame_vector_args (frame);
vlib_get_buffers (vm, from, bufs, n_left);
b = bufs;
sw_if_index = sw_if_indices;
/* It's all going to l2-input */
clib_memset_u16 (nexts, 0, VLIB_FRAME_SIZE);
/*
* For each packet:
* - fixup the L2 length of the packet
* - set the RX interface (which the bridge will use) to the
* TX interface (which routing has chosen)
* - Set the TX interface to the special ID so the DP knows this is a BVI
* Don't counts packets and bytes, that's done in the bviX-output node
*/
while (n_left >= 4)
{
/* Prefetch next iteration. */
if (PREDICT_TRUE (n_left >= 8))
{
/* LOAD pre-fetch since meta and packet data is read */
vlib_prefetch_buffer_header (b[4], LOAD);
vlib_prefetch_buffer_header (b[5], LOAD);
vlib_prefetch_buffer_header (b[6], LOAD);
vlib_prefetch_buffer_header (b[7], LOAD);
vlib_prefetch_buffer_data (b[4], LOAD);
vlib_prefetch_buffer_data (b[5], LOAD);
vlib_prefetch_buffer_data (b[6], LOAD);
vlib_prefetch_buffer_data (b[7], LOAD);
}
vnet_update_l2_len (b[0]);
vnet_update_l2_len (b[1]);
vnet_update_l2_len (b[2]);
vnet_update_l2_len (b[3]);
sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
vnet_buffer (b[0])->sw_if_index[VLIB_TX] = L2INPUT_BVI;
vnet_buffer (b[1])->sw_if_index[VLIB_TX] = L2INPUT_BVI;
vnet_buffer (b[2])->sw_if_index[VLIB_TX] = L2INPUT_BVI;
vnet_buffer (b[3])->sw_if_index[VLIB_TX] = L2INPUT_BVI;
vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index[0];
vnet_buffer (b[1])->sw_if_index[VLIB_RX] = sw_if_index[1];
vnet_buffer (b[2])->sw_if_index[VLIB_RX] = sw_if_index[2];
vnet_buffer (b[3])->sw_if_index[VLIB_RX] = sw_if_index[3];
b += 4;
n_left -= 4;
sw_if_index += 4;
}
while (n_left)
{
sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
vnet_buffer (b[0])->sw_if_index[VLIB_TX] = L2INPUT_BVI;
vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index[0];
vnet_update_l2_len (b[0]);
b += 1;
n_left -= 1;
sw_if_index += 1;
}
vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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