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-rw-r--r--src/vnet/l2/l2_output_classify.c657
1 files changed, 657 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_output_classify.c b/src/vnet/l2/l2_output_classify.c
new file mode 100644
index 00000000000..27d5eb39514
--- /dev/null
+++ b/src/vnet/l2/l2_output_classify.c
@@ -0,0 +1,657 @@
+/*
+ * 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/l2/l2_classify.h>
+#include <vnet/api_errno.h>
+
+/**
+ * @file
+ * @brief Layer 2 Output Classifier.
+ *
+ * @sa @ref vnet/vnet/classify/vnet_classify.c
+ * @sa @ref vnet/vnet/classify/vnet_classify.h
+ */
+
+typedef struct
+{
+ /** interface handle for the ith packet */
+ u32 sw_if_index;
+ /** graph arc index selected for this packet */
+ u32 next_index;
+ /** classifier table which provided the final result */
+ u32 table_index;
+ /** offset in classifier heap of the corresponding session */
+ u32 session_offset;
+} l2_output_classify_trace_t;
+
+typedef struct
+{
+ /** use-case independent main object pointer */
+ vnet_classify_main_t *vcm;
+ /** l2 input classifier main object pointer */
+ l2_output_classify_main_t *l2cm;
+} l2_output_classify_runtime_t;
+
+/** Packet trace format function. */
+static u8 *
+format_l2_output_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 *);
+ l2_output_classify_trace_t *t =
+ va_arg (*args, l2_output_classify_trace_t *);
+
+ s = format (s, "l2-classify: sw_if_index %d, table %d, offset %x, next %d",
+ t->sw_if_index, t->table_index, t->session_offset,
+ t->next_index);
+ return s;
+}
+
+/** l2 output classifier main data structure. */
+l2_output_classify_main_t l2_output_classify_main;
+
+vlib_node_registration_t l2_output_classify_node;
+
+#define foreach_l2_output_classify_error \
+_(MISS, "Classify misses") \
+_(HIT, "Classify hits") \
+_(CHAIN_HIT, "Classify hits after chain walk") \
+_(DROP, "L2 Classify Drops")
+
+typedef enum
+{
+#define _(sym,str) L2_OUTPUT_CLASSIFY_ERROR_##sym,
+ foreach_l2_output_classify_error
+#undef _
+ L2_OUTPUT_CLASSIFY_N_ERROR,
+} l2_output_classify_error_t;
+
+static char *l2_output_classify_error_strings[] = {
+#define _(sym,string) string,
+ foreach_l2_output_classify_error
+#undef _
+};
+
+/**
+ * @brief l2 output classifier node.
+ * @node l2-output-classify
+ *
+ * This is the l2 output classifier dispatch node
+ *
+ * @param vm vlib_main_t corresponding to the current thread.
+ * @param node vlib_node_runtime_t data for this node.
+ * @param frame vlib_frame_t whose contents should be dispatched.
+ *
+ * @par Graph mechanics: buffer metadata, next index usage
+ *
+ * @em Uses:
+ * - <code>(l2_output_classify_runtime_t *)
+ * rt->classify_table_index_by_sw_if_index</code>
+ * Head of the per-interface, perprotocol classifier table chain
+ * for a specific interface. ~0 => send pkts to the next
+ * feature in the L2 feature chain.
+ * - <code>vnet_buffer(b)->sw_if_index[VLIB_TX]</code>
+ * - Indicates the @c sw_if_index value of the interface that the
+ * packet was received on.
+ * - <code>vnet_buffer (b0)->l2.feature_bitmap</code>
+ * - Used to steer packets across l2 features enabled on the interface
+ * - <code>(vnet_classify_entry_t) e0->next_index</code>
+ * - Used to steer traffic when the classifier hits on a session
+ * - <code>(vnet_classify_entry_t) e0->advance</code>
+ * - Signed quantity applied via <code>vlib_buffer_advance</code>
+ * when the classifier hits on a session
+ * - <code>(vnet_classify_table_t) t0->miss_next_index</code>
+ * - Used to steer traffic when the classifier misses
+ *
+ * @em Sets:
+ * - <code>vnet_buffer (b0)->l2_classify.table_index</code>
+ * - Classifier table index of the first classifier table in
+ * the classifier table chain
+ * - <code>vnet_buffer (b0)->l2_classify.hash</code>
+ * - Bounded-index extensible hash corresponding to the
+ * masked fields in the current packet
+ * - <code>vnet_buffer (b0)->l2.feature_bitmap</code>
+ * - Used to steer packets across l2 features enabled on the interface
+ * - <code>vnet_buffer (b0)->l2_classify.opaque_index</code>
+ * - Copied from the classifier session object upon classifier hit
+ *
+ * @em Counters:
+ * - <code>L2_OUTPUT_CLASSIFY_ERROR_MISS</code> Classifier misses
+ * - <code>L2_OUTPUT_CLASSIFY_ERROR_HIT</code> Classifier hits
+ * - <code>L2_OUTPUT_CLASSIFY_ERROR_CHAIN_HIT</code>
+ * Classifier hits in other than the first table
+ */
+
+static uword
+l2_output_classify_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ l2_output_classify_next_t next_index;
+ l2_output_classify_main_t *cm = &l2_output_classify_main;
+ vnet_classify_main_t *vcm = cm->vnet_classify_main;
+ l2_output_classify_runtime_t *rt =
+ (l2_output_classify_runtime_t *) node->runtime_data;
+ u32 feature_bitmap0;
+ u32 hits = 0;
+ u32 misses = 0;
+ u32 chain_hits = 0;
+ f64 now;
+ u32 n_next_nodes;
+ u32 cached_sw_if_index = (u32) ~ 0;
+ u32 cached_next_index = (u32) ~ 0;
+ u32 sw_if_index0;
+
+ n_next_nodes = node->n_next_nodes;
+
+ now = vlib_time_now (vm);
+
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+
+ /* First pass: compute hash */
+
+ while (n_left_from > 2)
+ {
+ vlib_buffer_t *b0, *b1;
+ u32 bi0, bi1;
+ ethernet_header_t *h0, *h1;
+ u32 sw_if_index0, sw_if_index1;
+ u16 type0, type1;
+ int type_index0, type_index1;
+ vnet_classify_table_t *t0, *t1;
+ u32 table_index0, table_index1;
+ u64 hash0, hash1;
+
+
+ /* 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 = vlib_buffer_get_current (b0);
+
+ bi1 = from[1];
+ b1 = vlib_get_buffer (vm, bi1);
+ h1 = vlib_buffer_get_current (b1);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ vnet_buffer (b0)->l2_classify.table_index = ~0;
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+ vnet_buffer (b1)->l2_classify.table_index = ~0;
+
+ /* Select classifier table based on ethertype */
+ type0 = clib_net_to_host_u16 (h0->type);
+ type1 = clib_net_to_host_u16 (h1->type);
+
+ type_index0 = (type0 == ETHERNET_TYPE_IP4)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP4 : L2_OUTPUT_CLASSIFY_TABLE_OTHER;
+ type_index0 = (type0 == ETHERNET_TYPE_IP6)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP6 : type_index0;
+
+ type_index1 = (type1 == ETHERNET_TYPE_IP4)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP4 : L2_OUTPUT_CLASSIFY_TABLE_OTHER;
+ type_index1 = (type1 == ETHERNET_TYPE_IP6)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP6 : type_index1;
+
+ vnet_buffer (b0)->l2_classify.table_index =
+ table_index0 =
+ rt->l2cm->classify_table_index_by_sw_if_index
+ [type_index0][sw_if_index0];
+
+ if (table_index0 != ~0)
+ {
+ t0 = pool_elt_at_index (vcm->tables, table_index0);
+
+ vnet_buffer (b0)->l2_classify.hash = hash0 =
+ vnet_classify_hash_packet (t0, (u8 *) h0);
+ vnet_classify_prefetch_bucket (t0, hash0);
+ }
+
+ vnet_buffer (b1)->l2_classify.table_index =
+ table_index1 =
+ rt->l2cm->classify_table_index_by_sw_if_index
+ [type_index1][sw_if_index1];
+
+ if (table_index1 != ~0)
+ {
+ t1 = pool_elt_at_index (vcm->tables, table_index1);
+
+ vnet_buffer (b1)->l2_classify.hash = hash1 =
+ vnet_classify_hash_packet (t1, (u8 *) h1);
+ vnet_classify_prefetch_bucket (t1, hash1);
+ }
+
+ from += 2;
+ n_left_from -= 2;
+ }
+
+ while (n_left_from > 0)
+ {
+ vlib_buffer_t *b0;
+ u32 bi0;
+ ethernet_header_t *h0;
+ u16 type0;
+ u32 type_index0;
+ vnet_classify_table_t *t0;
+ u32 table_index0;
+ u64 hash0;
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+ h0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ vnet_buffer (b0)->l2_classify.table_index = ~0;
+
+ /* Select classifier table based on ethertype */
+ type0 = clib_net_to_host_u16 (h0->type);
+
+ type_index0 = (type0 == ETHERNET_TYPE_IP4)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP4 : L2_OUTPUT_CLASSIFY_TABLE_OTHER;
+ type_index0 = (type0 == ETHERNET_TYPE_IP6)
+ ? L2_OUTPUT_CLASSIFY_TABLE_IP6 : type_index0;
+
+ vnet_buffer (b0)->l2_classify.table_index =
+ table_index0 = rt->l2cm->classify_table_index_by_sw_if_index
+ [type_index0][sw_if_index0];
+
+ if (table_index0 != ~0)
+ {
+ t0 = pool_elt_at_index (vcm->tables, table_index0);
+
+ vnet_buffer (b0)->l2_classify.hash = hash0 =
+ vnet_classify_hash_packet (t0, (u8 *) h0);
+ vnet_classify_prefetch_bucket (t0, hash0);
+ }
+ 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 = ~0;
+ ethernet_header_t *h0;
+ u32 table_index0;
+ u64 hash0;
+ vnet_classify_table_t *t0;
+ vnet_classify_entry_t *e0;
+
+ if (PREDICT_TRUE (n_left_from > 2))
+ {
+ vlib_buffer_t *p2 = vlib_get_buffer (vm, from[2]);
+ u64 phash2;
+ u32 table_index2;
+ vnet_classify_table_t *tp2;
+
+ /*
+ * Prefetch table entry two ahead. Buffer / data
+ * were prefetched above...
+ */
+ table_index2 = vnet_buffer (p2)->l2_classify.table_index;
+
+ if (PREDICT_TRUE (table_index2 != ~0))
+ {
+ tp2 = pool_elt_at_index (vcm->tables, table_index2);
+ phash2 = vnet_buffer (p2)->l2_classify.hash;
+ vnet_classify_prefetch_entry (tp2, phash2);
+ }
+ }
+
+ /* 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 = vlib_buffer_get_current (b0);
+ table_index0 = vnet_buffer (b0)->l2_classify.table_index;
+ e0 = 0;
+ vnet_buffer (b0)->l2_classify.opaque_index = ~0;
+ /* Remove ourself from the feature bitmap */
+ feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap
+ & ~L2OUTPUT_FEAT_OUTPUT_CLASSIFY;
+
+ /* save for next feature graph nodes */
+ vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap0;
+
+ 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 < 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_nodes) ?
+ 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 < n_next_nodes) ?
+ e0->next_index : next0;
+ hits++;
+ chain_hits++;
+ break;
+ }
+ }
+ }
+ }
+
+ if (PREDICT_FALSE (next0 == 0))
+ b0->error = node->errors[L2_OUTPUT_CLASSIFY_ERROR_DROP];
+
+ if (PREDICT_FALSE (next0 == ~0))
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+
+ /* Determine next node */
+ l2_output_dispatch (cm->vlib_main,
+ cm->vnet_main,
+ node,
+ l2_output_classify_node.index,
+ &cached_sw_if_index,
+ &cached_next_index,
+ &cm->next_nodes,
+ b0, sw_if_index0, feature_bitmap0, &next0);
+ }
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ l2_output_classify_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ t->table_index = table_index0;
+ t->next_index = next0;
+ t->session_offset = e0 ? vnet_classify_get_offset (t0, e0) : 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,
+ L2_OUTPUT_CLASSIFY_ERROR_MISS, misses);
+ vlib_node_increment_counter (vm, node->node_index,
+ L2_OUTPUT_CLASSIFY_ERROR_HIT, hits);
+ vlib_node_increment_counter (vm, node->node_index,
+ L2_OUTPUT_CLASSIFY_ERROR_CHAIN_HIT,
+ chain_hits);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (l2_output_classify_node) = {
+ .function = l2_output_classify_node_fn,
+ .name = "l2-output-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2_output_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(l2_output_classify_error_strings),
+ .error_strings = l2_output_classify_error_strings,
+
+ .runtime_data_bytes = sizeof (l2_output_classify_runtime_t),
+
+ .n_next_nodes = L2_OUTPUT_CLASSIFY_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [L2_OUTPUT_CLASSIFY_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (l2_output_classify_node,
+ l2_output_classify_node_fn);
+
+/** l2 output classsifier feature initialization. */
+clib_error_t *
+l2_output_classify_init (vlib_main_t * vm)
+{
+ l2_output_classify_main_t *cm = &l2_output_classify_main;
+ l2_output_classify_runtime_t *rt;
+
+ rt = vlib_node_get_runtime_data (vm, l2_output_classify_node.index);
+
+ cm->vlib_main = vm;
+ cm->vnet_main = vnet_get_main ();
+ cm->vnet_classify_main = &vnet_classify_main;
+
+ /* Initialize the feature next-node indexes */
+ feat_bitmap_init_next_nodes (vm,
+ l2_output_classify_node.index,
+ L2OUTPUT_N_FEAT,
+ l2output_get_feat_names (),
+ cm->feat_next_node_index);
+ rt->l2cm = cm;
+ rt->vcm = cm->vnet_classify_main;
+
+ /* Initialize the output node mapping table */
+ l2output_init_output_node_vec (&cm->next_nodes.output_node_index_vec);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (l2_output_classify_init);
+
+/** Enable/disable l2 input classification on a specific interface. */
+void
+vnet_l2_output_classify_enable_disable (u32 sw_if_index, int enable_disable)
+{
+
+ l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_OUTPUT_CLASSIFY,
+ (u32) enable_disable);
+}
+
+/** @brief Set l2 per-protocol, per-interface output classification tables.
+ *
+ * @param sw_if_index interface handle
+ * @param ip4_table_index ip4 classification table index, or ~0
+ * @param ip6_table_index ip6 classification table index, or ~0
+ * @param other_table_index non-ip4, non-ip6 classification table index,
+ * or ~0
+ * @returns 0 on success, VNET_API_ERROR_NO_SUCH_TABLE, TABLE2, TABLE3
+ * if the indicated (non-~0) table does not exist.
+ */
+
+int
+vnet_l2_output_classify_set_tables (u32 sw_if_index,
+ u32 ip4_table_index,
+ u32 ip6_table_index,
+ u32 other_table_index)
+{
+ l2_output_classify_main_t *cm = &l2_output_classify_main;
+ vnet_classify_main_t *vcm = cm->vnet_classify_main;
+
+ /* Assume that we've validated sw_if_index in the API layer */
+
+ if (ip4_table_index != ~0 &&
+ pool_is_free_index (vcm->tables, ip4_table_index))
+ return VNET_API_ERROR_NO_SUCH_TABLE;
+
+ if (ip6_table_index != ~0 &&
+ pool_is_free_index (vcm->tables, ip6_table_index))
+ return VNET_API_ERROR_NO_SUCH_TABLE2;
+
+ if (other_table_index != ~0 &&
+ pool_is_free_index (vcm->tables, other_table_index))
+ return VNET_API_ERROR_NO_SUCH_TABLE3;
+
+ vec_validate
+ (cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP4],
+ sw_if_index);
+
+ vec_validate
+ (cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP6],
+ sw_if_index);
+
+ vec_validate
+ (cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_OTHER],
+ sw_if_index);
+
+ cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP4]
+ [sw_if_index] = ip4_table_index;
+
+ cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_IP6]
+ [sw_if_index] = ip6_table_index;
+
+ cm->classify_table_index_by_sw_if_index[L2_OUTPUT_CLASSIFY_TABLE_OTHER]
+ [sw_if_index] = other_table_index;
+
+ return 0;
+}
+
+static clib_error_t *
+int_l2_output_classify_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 sw_if_index = ~0;
+ u32 ip4_table_index = ~0;
+ u32 ip6_table_index = ~0;
+ u32 other_table_index = ~0;
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
+ vnm, &sw_if_index))
+ ;
+ else if (unformat (input, "ip4-table %d", &ip4_table_index))
+ ;
+ else if (unformat (input, "ip6-table %d", &ip6_table_index))
+ ;
+ else if (unformat (input, "other-table %d", &other_table_index))
+ ;
+ else
+ break;
+ }
+
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "interface must be specified");
+
+
+ if (ip4_table_index == ~0 && ip6_table_index == ~0
+ && other_table_index == ~0)
+ {
+ vlib_cli_output (vm, "L2 classification disabled");
+ vnet_l2_output_classify_enable_disable (sw_if_index, 0 /* enable */ );
+ return 0;
+ }
+
+ rv = vnet_l2_output_classify_set_tables (sw_if_index, ip4_table_index,
+ ip6_table_index,
+ other_table_index);
+ switch (rv)
+ {
+ case 0:
+ vnet_l2_output_classify_enable_disable (sw_if_index, 1 /* enable */ );
+ break;
+
+ default:
+ return clib_error_return (0, "vnet_l2_output_classify_set_tables: %d",
+ rv);
+ break;
+ }
+
+ return 0;
+}
+
+/*?
+ * Configure Layer 2 output classification.
+ *
+ * @cliexpar
+ * @cliexstart{set interface l2 output classify intfc <interface-name> [ip4-table <index>] [ip6-table <index>] [other-table <index>]}
+ * @cliexend
+ * @todo This is incomplete. This needs a detailed description and a
+ * practical example.
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (int_l2_output_classify_cli, static) = {
+ .path = "set interface l2 output classify",
+ .short_help =
+ "set interface l2 output classify intfc <<interface-name>> [ip4-table <n>]\n"
+ " [ip6-table <n>] [other-table <n>]",
+ .function = int_l2_output_classify_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */