diff options
Diffstat (limited to 'src/vnet/adj/adj_midchain_node.c')
| -rw-r--r-- | src/vnet/adj/adj_midchain_node.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/src/vnet/adj/adj_midchain_node.c b/src/vnet/adj/adj_midchain_node.c new file mode 100644 index 00000000000..170ed19855e --- /dev/null +++ b/src/vnet/adj/adj_midchain_node.c @@ -0,0 +1,241 @@ +/* + * 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 <vnet/adj/adj_internal.h> +#include <vnet/adj/adj_midchain.h> + +/** + * @brief Trace data for packets traversing the midchain tx node + */ +typedef struct adj_midchain_tx_trace_t_ +{ + /** + * @brief the midchain adj we are traversing + */ + adj_index_t ai; +} adj_midchain_tx_trace_t; + +always_inline uword +adj_midchain_tx_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int interface_count) +{ + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; + u16 nexts[VLIB_FRAME_SIZE], *next; + u32 * from, n_left, thread_index; + vnet_main_t *vnm = vnet_get_main (); + vnet_interface_main_t *im = &vnm->interface_main; + + thread_index = vm->thread_index; + n_left = frame->n_vectors; + from = vlib_frame_vector_args (frame); + + vlib_get_buffers (vm, from, bufs, n_left); + + next = nexts; + b = bufs; + + while (n_left > 8) + { + u32 adj_index0, adj_index1, adj_index2, adj_index3; + const ip_adjacency_t *adj0, *adj1, *adj2, *adj3; + const dpo_id_t *dpo0, *dpo1, *dpo2, *dpo3; + + /* Prefetch next iteration. */ + { + 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); + } + + /* Follow the DPO on which the midchain is stacked */ + adj_index0 = vnet_buffer(b[0])->ip.adj_index[VLIB_TX]; + adj_index1 = vnet_buffer(b[1])->ip.adj_index[VLIB_TX]; + adj_index2 = vnet_buffer(b[2])->ip.adj_index[VLIB_TX]; + adj_index3 = vnet_buffer(b[3])->ip.adj_index[VLIB_TX]; + + adj0 = adj_get(adj_index0); + adj1 = adj_get(adj_index1); + adj2 = adj_get(adj_index2); + adj3 = adj_get(adj_index3); + + dpo0 = &adj0->sub_type.midchain.next_dpo; + dpo1 = &adj1->sub_type.midchain.next_dpo; + dpo2 = &adj2->sub_type.midchain.next_dpo; + dpo3 = &adj3->sub_type.midchain.next_dpo; + + next[0] = dpo0->dpoi_next_node; + next[1] = dpo1->dpoi_next_node; + next[2] = dpo2->dpoi_next_node; + next[3] = dpo3->dpoi_next_node; + + vnet_buffer(b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; + vnet_buffer(b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; + vnet_buffer(b[2])->ip.adj_index[VLIB_TX] = dpo2->dpoi_index; + vnet_buffer(b[3])->ip.adj_index[VLIB_TX] = dpo3->dpoi_index; + + if (interface_count) + { + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + thread_index, + adj0->rewrite_header.sw_if_index, + 1, + vlib_buffer_length_in_chain (vm, b[0])); + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + thread_index, + adj1->rewrite_header.sw_if_index, + 1, + vlib_buffer_length_in_chain (vm, b[1])); + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + thread_index, + adj2->rewrite_header.sw_if_index, + 1, + vlib_buffer_length_in_chain (vm, b[2])); + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + thread_index, + adj3->rewrite_header.sw_if_index, + 1, + vlib_buffer_length_in_chain (vm, b[3])); + } + + if (PREDICT_FALSE(node->flags & VLIB_NODE_FLAG_TRACE)) + { + if (PREDICT_FALSE(b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node, + b[0], sizeof (*tr)); + tr->ai = adj_index0; + } + if (PREDICT_FALSE(b[1]->flags & VLIB_BUFFER_IS_TRACED)) + { + adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node, + b[1], sizeof (*tr)); + tr->ai = adj_index1; + } + if (PREDICT_FALSE(b[2]->flags & VLIB_BUFFER_IS_TRACED)) + { + adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node, + b[2], sizeof (*tr)); + tr->ai = adj_index2; + } + if (PREDICT_FALSE(b[3]->flags & VLIB_BUFFER_IS_TRACED)) + { + adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node, + b[3], sizeof (*tr)); + tr->ai = adj_index3; + } + } + n_left -= 4; + b += 4; + next += 4; + } + + while (n_left) + { + const ip_adjacency_t * adj0; + const dpo_id_t *dpo0; + u32 adj_index0; + + /* Follow the DPO on which the midchain is stacked */ + adj_index0 = vnet_buffer(b[0])->ip.adj_index[VLIB_TX]; + adj0 = adj_get(adj_index0); + dpo0 = &adj0->sub_type.midchain.next_dpo; + next[0] = dpo0->dpoi_next_node; + vnet_buffer(b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; + + if (interface_count) + { + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_TX, + thread_index, + adj0->rewrite_header.sw_if_index, + 1, + vlib_buffer_length_in_chain (vm, b[0])); + } + + if (PREDICT_FALSE(b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + adj_midchain_tx_trace_t *tr = vlib_add_trace (vm, node, + b[0], sizeof (*tr)); + tr->ai = adj_index0; + } + + n_left -= 1; + b += 1; + next += 1; + } + + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + + return frame->n_vectors; +} + +static u8 * +format_adj_midchain_tx_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 *); + adj_midchain_tx_trace_t *tr = va_arg (*args, adj_midchain_tx_trace_t*); + + s = format(s, "adj-midchain:[%d]:%U", tr->ai, + format_ip_adjacency, tr->ai, + FORMAT_IP_ADJACENCY_NONE); + + return (s); +} + +static uword +adj_midchain_tx (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (adj_midchain_tx_inline(vm, node, frame, 1)); +} + +VLIB_REGISTER_NODE (adj_midchain_tx_node) = { + .function = adj_midchain_tx, + .name = "adj-midchain-tx", + .vector_size = sizeof (u32), + + .format_trace = format_adj_midchain_tx_trace, + + .n_next_nodes = 1, + .next_nodes = { + [0] = "error-drop", + }, +}; + +static uword +adj_midchain_tx_no_count (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (adj_midchain_tx_inline(vm, node, frame, 0)); +} + +VLIB_REGISTER_NODE (adj_midchain_tx_no_count_node) = { + .function = adj_midchain_tx_no_count, + .name = "adj-midchain-tx-no-count", + .vector_size = sizeof (u32), + + .format_trace = format_adj_midchain_tx_trace, + .sibling_of = "adj-midchain-tx", +}; |