--- /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>
+
+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;
+ ip_lookup_main_t * lm;
+ f64 now = vlib_time_now (vm);
+ u32 hits = 0;
+ u32 misses = 0;
+ u32 chain_hits = 0;
+
+ if (is_ip4)
+ lm = &ip4_main.lookup_main;
+ else
+ lm = &ip6_main.lookup_main;
+
+ 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 adj_index0, adj_index1;
+ ip_adjacency_t * adj0, * adj1;
+ 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 = b0->data;
+
+ bi1 = from[1];
+ b1 = vlib_get_buffer (vm, bi1);
+ h1 = b1->data;
+
+ adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
+ adj0 = ip_get_adjacency (lm, adj_index0);
+ table_index0 = adj0->classify_table_index;
+
+ adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
+ adj1 = ip_get_adjacency (lm, adj_index1);
+ table_index1 = adj1->classify_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 adj_index0;
+ ip_adjacency_t * adj0;
+ u32 table_index0;
+ vnet_classify_table_t * t0;
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+ h0 = b0->data;
+
+ adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
+ adj0 = ip_get_adjacency (lm, adj_index0);
+ table_index0 = adj0->classify_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_MISS;
+ 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 < IP_LOOKUP_N_NEXT)?
+ 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 < IP_LOOKUP_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 < IP_LOOKUP_N_NEXT)?
+ 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),
+ .format_trace = format_ip_classify_trace,
+ .n_errors = ARRAY_LEN(ip_classify_error_strings),
+ .error_strings = ip_classify_error_strings,
+
+ .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .next_nodes = {
+ [IP_LOOKUP_NEXT_MISS] = "ip4-miss",
+ [IP_LOOKUP_NEXT_DROP] = "ip4-drop",
+ [IP_LOOKUP_NEXT_PUNT] = "ip4-punt",
+ [IP_LOOKUP_NEXT_LOCAL] = "ip4-local",
+ [IP_LOOKUP_NEXT_ARP] = "ip4-arp",
+ [IP_LOOKUP_NEXT_REWRITE] = "ip4-rewrite-transit",
+ [IP_LOOKUP_NEXT_CLASSIFY] = "ip4-classify", /* probably not... */
+ [IP_LOOKUP_NEXT_MAP] = "ip4-map",
+ [IP_LOOKUP_NEXT_MAP_T] = "ip4-map-t",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip4-sixrd",
+ [IP_LOOKUP_NEXT_HOP_BY_HOP] = "ip4-hop-by-hop",
+ [IP_LOOKUP_NEXT_ADD_HOP_BY_HOP] = "ip4-add-hop-by-hop",
+ [IP_LOOKUP_NEXT_POP_HOP_BY_HOP] = "ip4-pop-hop-by-hop",
+ },
+};
+
+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),
+ .format_trace = format_ip_classify_trace,
+ .n_errors = ARRAY_LEN(ip_classify_error_strings),
+ .error_strings = ip_classify_error_strings,
+
+ .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .next_nodes = {
+ [IP_LOOKUP_NEXT_MISS] = "ip6-miss",
+ [IP_LOOKUP_NEXT_DROP] = "ip6-drop",
+ [IP_LOOKUP_NEXT_PUNT] = "ip6-punt",
+ [IP_LOOKUP_NEXT_LOCAL] = "ip6-local",
+ [IP_LOOKUP_NEXT_ARP] = "ip6-discover-neighbor",
+ [IP_LOOKUP_NEXT_REWRITE] = "ip6-rewrite",
+ [IP_LOOKUP_NEXT_CLASSIFY] = "ip6-classify", /* probably not... */
+ [IP_LOOKUP_NEXT_MAP] = "ip6-map",
+ [IP_LOOKUP_NEXT_MAP_T] = "ip6-map-t",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip6-sixrd",
+ [IP_LOOKUP_NEXT_HOP_BY_HOP] = "ip6-hop-by-hop",
+ [IP_LOOKUP_NEXT_ADD_HOP_BY_HOP] = "ip6-add-hop-by-hop",
+ [IP_LOOKUP_NEXT_POP_HOP_BY_HOP] = "ip6-pop-hop-by-hop",
+ },
+};
+
+static clib_error_t *
+ip_classify_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip_classify_init);
Code Review / vpp.git / blobdiff