+++ /dev/null
-/*
- * l2_input_vtr.c : layer 2 input vlan tag rewrite processing
- *
- * 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 <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/packet.h>
-#include <vnet/l2/l2_input.h>
-#include <vnet/l2/feat_bitmap.h>
-#include <vnet/l2/l2_vtr.h>
-#include <vnet/l2/l2_input_vtr.h>
-#include <vnet/l2/l2_output.h>
-
-#include <vppinfra/error.h>
-#include <vppinfra/cache.h>
-
-
-typedef struct
-{
- /* per-pkt trace data */
- u8 src[6];
- u8 dst[6];
- u8 raw[12]; /* raw data (vlans) */
- u32 sw_if_index;
-} l2_invtr_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_l2_invtr_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 *);
- l2_invtr_trace_t *t = va_arg (*args, l2_invtr_trace_t *);
-
- s = format (s, "l2-input-vtr: sw_if_index %d dst %U src %U data "
- "%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
- t->sw_if_index,
- format_ethernet_address, t->dst,
- format_ethernet_address, t->src,
- t->raw[0], t->raw[1], t->raw[2], t->raw[3], t->raw[4],
- t->raw[5], t->raw[6], t->raw[7], t->raw[8], t->raw[9],
- t->raw[10], t->raw[11]);
- return s;
-}
-
-l2_invtr_main_t l2_invtr_main;
-
-static vlib_node_registration_t l2_invtr_node;
-
-#define foreach_l2_invtr_error \
-_(L2_INVTR, "L2 inverter packets") \
-_(DROP, "L2 input tag rewrite drops")
-
-typedef enum
-{
-#define _(sym,str) L2_INVTR_ERROR_##sym,
- foreach_l2_invtr_error
-#undef _
- L2_INVTR_N_ERROR,
-} l2_invtr_error_t;
-
-static char *l2_invtr_error_strings[] = {
-#define _(sym,string) string,
- foreach_l2_invtr_error
-#undef _
-};
-
-typedef enum
-{
- L2_INVTR_NEXT_DROP,
- L2_INVTR_N_NEXT,
-} l2_invtr_next_t;
-
-
-static uword
-l2_invtr_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- l2_invtr_next_t next_index;
- l2_invtr_main_t *msm = &l2_invtr_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors; /* number of packets to process */
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- /* get space to enqueue frame to graph node "next_index" */
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 6 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- u32 feature_bitmap0, feature_bitmap1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3, *p4, *p5;
- u32 sw_if_index2, sw_if_index3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
- p4 = vlib_get_buffer (vm, from[4]);
- p5 = vlib_get_buffer (vm, from[5]);
-
- /* Prefetch the buffer header and packet for the N+2 loop iteration */
- vlib_prefetch_buffer_header (p4, LOAD);
- vlib_prefetch_buffer_header (p5, LOAD);
-
- CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
-
- /*
- * Prefetch the input config for the N+1 loop iteration
- * This depends on the buffer header above
- */
- sw_if_index2 = vnet_buffer (p2)->sw_if_index[VLIB_RX];
- sw_if_index3 = vnet_buffer (p3)->sw_if_index[VLIB_RX];
- CLIB_PREFETCH (vec_elt_at_index
- (l2output_main.configs, sw_if_index2),
- CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (vec_elt_at_index
- (l2output_main.configs, sw_if_index3),
- CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- /* bi is "buffer index", b is pointer to the buffer */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* RX interface handles */
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
-
- /* process 2 packets */
-
- /* Remove ourself from the feature bitmap */
- feature_bitmap0 =
- vnet_buffer (b0)->l2.feature_bitmap & ~L2INPUT_FEAT_VTR;
- feature_bitmap1 =
- vnet_buffer (b1)->l2.feature_bitmap & ~L2INPUT_FEAT_VTR;
-
- /* save for next feature graph nodes */
- vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap0;
- vnet_buffer (b1)->l2.feature_bitmap = feature_bitmap1;
-
- /* Determine the next node */
- next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
- feature_bitmap0);
- next1 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
- feature_bitmap1);
-
- l2_output_config_t *config0;
- l2_output_config_t *config1;
- config0 = vec_elt_at_index (l2output_main.configs, sw_if_index0);
- config1 = vec_elt_at_index (l2output_main.configs, sw_if_index1);
-
- if (PREDICT_FALSE (config0->out_vtr_flag))
- {
- if (config0->output_vtr.push_and_pop_bytes)
- {
- /* perform the tag rewrite on two packets */
- if (l2_vtr_process
- (b0,
- &(vec_elt_at_index
- (l2output_main.configs, sw_if_index0)->input_vtr)))
- {
- /* Drop packet */
- next0 = L2_INVTR_NEXT_DROP;
- b0->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- else if (config0->output_pbb_vtr.push_and_pop_bytes)
- {
- if (l2_pbb_process (b0, &(config0->input_pbb_vtr)))
- {
- /* Drop packet */
- next0 = L2_INVTR_NEXT_DROP;
- b0->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- }
- if (PREDICT_FALSE (config1->out_vtr_flag))
- {
- if (config1->output_vtr.push_and_pop_bytes)
- {
- if (l2_vtr_process
- (b1,
- &(vec_elt_at_index
- (l2output_main.configs, sw_if_index1)->input_vtr)))
- {
- /* Drop packet */
- next1 = L2_INVTR_NEXT_DROP;
- b1->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- else if (config1->output_pbb_vtr.push_and_pop_bytes)
- {
- if (l2_pbb_process (b1, &(config1->input_pbb_vtr)))
- {
- /* Drop packet */
- next1 = L2_INVTR_NEXT_DROP;
- b1->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- }
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
- {
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- l2_invtr_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- ethernet_header_t *h0 = vlib_buffer_get_current (b0);
- t->sw_if_index = sw_if_index0;
- clib_memcpy (t->src, h0->src_address, 6);
- clib_memcpy (t->dst, h0->dst_address, 6);
- clib_memcpy (t->raw, &h0->type, sizeof (t->raw));
- }
- if (b1->flags & VLIB_BUFFER_IS_TRACED)
- {
- l2_invtr_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- ethernet_header_t *h1 = vlib_buffer_get_current (b1);
- t->sw_if_index = sw_if_index0;
- clib_memcpy (t->src, h1->src_address, 6);
- clib_memcpy (t->dst, h1->dst_address, 6);
- clib_memcpy (t->raw, &h1->type, sizeof (t->raw));
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- /* if next0==next1==next_index then nothing special needs to be done */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- u32 sw_if_index0;
- u32 feature_bitmap0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
- /* process 1 packet */
-
- /* Remove ourself from the feature bitmap */
- feature_bitmap0 =
- vnet_buffer (b0)->l2.feature_bitmap & ~L2INPUT_FEAT_VTR;
-
- /* save for next feature graph nodes */
- vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap0;
-
- /* Determine the next node */
- next0 = feat_bitmap_get_next_node_index (msm->feat_next_node_index,
- feature_bitmap0);
-
- l2_output_config_t *config0;
- config0 = vec_elt_at_index (l2output_main.configs, sw_if_index0);
-
- if (PREDICT_FALSE (config0->out_vtr_flag))
- {
- if (config0->output_vtr.push_and_pop_bytes)
- {
- /* perform the tag rewrite on one packet */
- if (l2_vtr_process
- (b0,
- &(vec_elt_at_index
- (l2output_main.configs, sw_if_index0)->input_vtr)))
- {
- /* Drop packet */
- next0 = L2_INVTR_NEXT_DROP;
- b0->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- else if (config0->output_pbb_vtr.push_and_pop_bytes)
- {
- if (l2_pbb_process (b0, &(config0->input_pbb_vtr)))
- {
- /* Drop packet */
- next0 = L2_INVTR_NEXT_DROP;
- b0->error = node->errors[L2_INVTR_ERROR_DROP];
- }
- }
- }
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- l2_invtr_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- ethernet_header_t *h0 = vlib_buffer_get_current (b0);
- t->sw_if_index = sw_if_index0;
- clib_memcpy (t->src, h0->src_address, 6);
- clib_memcpy (t->dst, h0->dst_address, 6);
- clib_memcpy (t->raw, &h0->type, sizeof (t->raw));
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (l2_invtr_node,static) = {
- .function = l2_invtr_node_fn,
- .name = "l2-input-vtr",
- .vector_size = sizeof (u32),
- .format_trace = format_l2_invtr_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(l2_invtr_error_strings),
- .error_strings = l2_invtr_error_strings,
-
- .n_next_nodes = L2_INVTR_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [L2_INVTR_NEXT_DROP] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FUNCTION_MULTIARCH (l2_invtr_node, l2_invtr_node_fn)
- clib_error_t *l2_invtr_init (vlib_main_t * vm)
-{
- l2_invtr_main_t *mp = &l2_invtr_main;
-
- mp->vlib_main = vm;
- mp->vnet_main = vnet_get_main ();
-
- /* Initialize the feature next-node indexes */
- feat_bitmap_init_next_nodes (vm,
- l2_invtr_node.index,
- L2INPUT_N_FEAT,
- l2input_get_feat_names (),
- mp->feat_next_node_index);
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (l2_invtr_init);
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff