/* * 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: */