diff options
Diffstat (limited to 'src/vnet/l2/l2_bvi_node.c')
| -rw-r--r-- | src/vnet/l2/l2_bvi_node.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_bvi_node.c b/src/vnet/l2/l2_bvi_node.c new file mode 100644 index 00000000000..dd7e1df46ce --- /dev/null +++ b/src/vnet/l2/l2_bvi_node.c @@ -0,0 +1,116 @@ +/* + * 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: + */ |