+++ /dev/null
-/*
- * Copyright (c) 2015 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/ip/ip.h>
-#include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
-#include <vnet/classify/vnet_classify.h>
-#include <vnet/dpo/classify_dpo.h>
-
-typedef struct {
- u32 next_index;
- u32 table_index;
- u32 entry_index;
-} ip_classify_trace_t;
-
-/* packet trace format function */
-static u8 * format_ip_classify_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 *);
- ip_classify_trace_t * t = va_arg (*args, ip_classify_trace_t *);
-
- s = format (s, "IP_CLASSIFY: next_index %d, table %d, entry %d",
- t->next_index, t->table_index, t->entry_index);
- return s;
-}
-
-vlib_node_registration_t ip4_classify_node;
-vlib_node_registration_t ip6_classify_node;
-
-#define foreach_ip_classify_error \
-_(MISS, "Classify misses") \
-_(HIT, "Classify hits") \
-_(CHAIN_HIT, "Classify hits after chain walk")
-
-typedef enum {
-#define _(sym,str) IP_CLASSIFY_ERROR_##sym,
- foreach_ip_classify_error
-#undef _
- IP_CLASSIFY_N_ERROR,
-} ip_classify_error_t;
-
-static char * ip_classify_error_strings[] = {
-#define _(sym,string) string,
- foreach_ip_classify_error
-#undef _
-};
-
-static inline uword
-ip_classify_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_ip4)
-{
- u32 n_left_from, * from, * to_next;
- ip_lookup_next_t next_index;
- vnet_classify_main_t * vcm = &vnet_classify_main;
- f64 now = vlib_time_now (vm);
- u32 hits = 0;
- u32 misses = 0;
- u32 chain_hits = 0;
- u32 n_next;
-
- if (is_ip4) {
- n_next = IP4_LOOKUP_N_NEXT;
- } else {
- n_next = IP6_LOOKUP_N_NEXT;
- }
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
-
- /* First pass: compute hashes */
-
- while (n_left_from > 2)
- {
- vlib_buffer_t * b0, * b1;
- u32 bi0, bi1;
- u8 * h0, * h1;
- u32 cd_index0, cd_index1;
- classify_dpo_t *cd0, * cd1;
- u32 table_index0, table_index1;
- vnet_classify_table_t * t0, * t1;
-
- /* prefetch next iteration */
- {
- vlib_buffer_t * p1, * p2;
-
- p1 = vlib_get_buffer (vm, from[1]);
- p2 = vlib_get_buffer (vm, from[2]);
-
- vlib_prefetch_buffer_header (p1, STORE);
- CLIB_PREFETCH (p1->data, CLIB_CACHE_LINE_BYTES, STORE);
- vlib_prefetch_buffer_header (p2, STORE);
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- bi0 = from[0];
- b0 = vlib_get_buffer (vm, bi0);
- h0 = (void *)vlib_buffer_get_current(b0) -
- ethernet_buffer_header_size(b0);
-
- bi1 = from[1];
- b1 = vlib_get_buffer (vm, bi1);
- h1 = (void *)vlib_buffer_get_current(b1) -
- ethernet_buffer_header_size(b1);
-
- cd_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
- cd0 = classify_dpo_get(cd_index0);
- table_index0 = cd0->cd_table_index;
-
- cd_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
- cd1 = classify_dpo_get(cd_index1);
- table_index1 = cd1->cd_table_index;
-
- t0 = pool_elt_at_index (vcm->tables, table_index0);
-
- t1 = pool_elt_at_index (vcm->tables, table_index1);
-
- vnet_buffer(b0)->l2_classify.hash =
- vnet_classify_hash_packet (t0, (u8 *) h0);
-
- vnet_classify_prefetch_bucket (t0, vnet_buffer(b0)->l2_classify.hash);
-
- vnet_buffer(b1)->l2_classify.hash =
- vnet_classify_hash_packet (t1, (u8 *) h1);
-
- vnet_classify_prefetch_bucket (t1, vnet_buffer(b1)->l2_classify.hash);
-
- vnet_buffer(b0)->l2_classify.table_index = table_index0;
-
- vnet_buffer(b1)->l2_classify.table_index = table_index1;
-
- from += 2;
- n_left_from -= 2;
- }
-
- while (n_left_from > 0)
- {
- vlib_buffer_t * b0;
- u32 bi0;
- u8 * h0;
- u32 cd_index0;
- classify_dpo_t *cd0;
- u32 table_index0;
- vnet_classify_table_t * t0;
-
- bi0 = from[0];
- b0 = vlib_get_buffer (vm, bi0);
- h0 = (void *)vlib_buffer_get_current(b0) -
- ethernet_buffer_header_size(b0);
-
- cd_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
- cd0 = classify_dpo_get(cd_index0);
- table_index0 = cd0->cd_table_index;
-
- t0 = pool_elt_at_index (vcm->tables, table_index0);
- vnet_buffer(b0)->l2_classify.hash =
- vnet_classify_hash_packet (t0, (u8 *) h0);
-
- vnet_buffer(b0)->l2_classify.table_index = table_index0;
- vnet_classify_prefetch_bucket (t0, vnet_buffer(b0)->l2_classify.hash);
-
- from++;
- n_left_from--;
- }
-
- next_index = node->cached_next_index;
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- /* Not enough load/store slots to dual loop... */
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0 = IP_LOOKUP_NEXT_DROP;
- u32 table_index0;
- vnet_classify_table_t * t0;
- vnet_classify_entry_t * e0;
- u64 hash0;
- u8 * h0;
-
- /* Stride 3 seems to work best */
- if (PREDICT_TRUE (n_left_from > 3))
- {
- vlib_buffer_t * p1 = vlib_get_buffer(vm, from[3]);
- vnet_classify_table_t * tp1;
- u32 table_index1;
- u64 phash1;
-
- table_index1 = vnet_buffer(p1)->l2_classify.table_index;
-
- if (PREDICT_TRUE (table_index1 != ~0))
- {
- tp1 = pool_elt_at_index (vcm->tables, table_index1);
- phash1 = vnet_buffer(p1)->l2_classify.hash;
- vnet_classify_prefetch_entry (tp1, phash1);
- }
- }
-
- /* 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);
- h0 = b0->data;
- table_index0 = vnet_buffer(b0)->l2_classify.table_index;
- e0 = 0;
- t0 = 0;
- vnet_buffer(b0)->l2_classify.opaque_index = ~0;
-
- if (PREDICT_TRUE(table_index0 != ~0))
- {
- hash0 = vnet_buffer(b0)->l2_classify.hash;
- t0 = pool_elt_at_index (vcm->tables, table_index0);
-
- e0 = vnet_classify_find_entry (t0, (u8 *) h0, hash0,
- now);
- if (e0)
- {
- vnet_buffer(b0)->l2_classify.opaque_index
- = e0->opaque_index;
- vlib_buffer_advance (b0, e0->advance);
- next0 = (e0->next_index < node->n_next_nodes)?
- e0->next_index:next0;
- hits++;
- }
- else
- {
- while (1)
- {
- if (t0->next_table_index != ~0)
- t0 = pool_elt_at_index (vcm->tables,
- t0->next_table_index);
- else
- {
- next0 = (t0->miss_next_index < n_next) ?
- t0->miss_next_index : next0;
- misses++;
- break;
- }
-
- hash0 = vnet_classify_hash_packet (t0, (u8 *) h0);
- e0 = vnet_classify_find_entry
- (t0, (u8 *) h0, hash0, now);
- if (e0)
- {
- vnet_buffer(b0)->l2_classify.opaque_index
- = e0->opaque_index;
- vlib_buffer_advance (b0, e0->advance);
- next0 = (e0->next_index < node->n_next_nodes)?
- e0->next_index:next0;
- hits++;
- chain_hits++;
- break;
- }
- }
- }
- }
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- ip_classify_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_index = next0;
- t->table_index = t0 ? t0 - vcm->tables : ~0;
- t->entry_index = e0 ? e0 - t0->entries : ~0;
- }
-
- /* 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);
- }
-
- vlib_node_increment_counter (vm, node->node_index,
- IP_CLASSIFY_ERROR_MISS,
- misses);
- vlib_node_increment_counter (vm, node->node_index,
- IP_CLASSIFY_ERROR_HIT,
- hits);
- vlib_node_increment_counter (vm, node->node_index,
- IP_CLASSIFY_ERROR_CHAIN_HIT,
- chain_hits);
- return frame->n_vectors;
-}
-
-static uword
-ip4_classify (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return ip_classify_inline (vm, node, frame, 1 /* is_ip4 */);
-}
-
-
-VLIB_REGISTER_NODE (ip4_classify_node) = {
- .function = ip4_classify,
- .name = "ip4-classify",
- .vector_size = sizeof (u32),
- .sibling_of = "ip4-lookup",
- .format_trace = format_ip_classify_trace,
- .n_errors = ARRAY_LEN(ip_classify_error_strings),
- .error_strings = ip_classify_error_strings,
-
- .n_next_nodes = 0,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (ip4_classify_node, ip4_classify)
-
-static uword
-ip6_classify (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return ip_classify_inline (vm, node, frame, 0 /* is_ip4 */);
-}
-
-
-VLIB_REGISTER_NODE (ip6_classify_node) = {
- .function = ip6_classify,
- .name = "ip6-classify",
- .vector_size = sizeof (u32),
- .sibling_of = "ip6-lookup",
- .format_trace = format_ip_classify_trace,
- .n_errors = ARRAY_LEN(ip_classify_error_strings),
- .error_strings = ip_classify_error_strings,
-
- .n_next_nodes = 0,
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (ip6_classify_node, ip6_classify)
-
-static clib_error_t *
-ip_classify_init (vlib_main_t * vm)
-{
- return 0;
-}
-
-VLIB_INIT_FUNCTION (ip_classify_init);
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