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+/*
+ * l2_output.h : layer 2 output packet 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.
+ */
+
+#ifndef included_vnet_l2_output_h
+#define included_vnet_l2_output_h
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/l2/feat_bitmap.h>
+#include <vnet/l2/l2_vtr.h>
+
+
+/* The L2 output feature configuration, a per-interface struct */
+typedef struct
+{
+
+ u32 feature_bitmap;
+
+ /*
+ * vlan tag rewrite for ingress and egress
+ * ingress vtr is located here because the same config data is used for
+ * the egress EFP filter check
+ */
+ vtr_config_t input_vtr;
+ vtr_config_t output_vtr;
+ ptr_config_t input_pbb_vtr;
+ ptr_config_t output_pbb_vtr;
+
+ /* some of these flags may get integrated into the feature bitmap */
+ u8 fwd_enable;
+ u8 flood_enable;
+
+ /* split horizon group */
+ u8 shg;
+
+ /* flag for output vtr operation */
+ u8 out_vtr_flag;
+
+} l2_output_config_t;
+
+
+/*
+ * The set of next nodes for features and interface output.
+ * Each output feature node should include this.
+ */
+typedef struct
+{
+ /*
+ * vector of output next node index, indexed by sw_if_index.
+ * used when all output features have been executed and the
+ * next nodes are the interface output nodes.
+ */
+ u32 *output_node_index_vec;
+
+ /*
+ * array of next node index for each output feature, indexed
+ * by l2output_feat_t. Used to determine next feature node.
+ */
+ u32 feat_next_node_index[32];
+
+} l2_output_next_nodes_st;
+
+
+typedef struct
+{
+ /* Next nodes for features and output interfaces */
+ l2_output_next_nodes_st next_nodes;
+
+ /* config vector indexed by sw_if_index */
+ l2_output_config_t *configs;
+
+ /* Convenience variables */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+} l2output_main_t;
+
+l2output_main_t l2output_main;
+
+/* L2 output features */
+
+/* Mappings from feature ID to graph node name */
+#define foreach_l2output_feat \
+ _(SPAN, "feature-bitmap-drop") \
+ _(CFM, "feature-bitmap-drop") \
+ _(QOS, "feature-bitmap-drop") \
+ _(ACL, "l2-output-acl") \
+ _(L2PT, "feature-bitmap-drop") \
+ _(EFP_FILTER, "l2-efp-filter") \
+ _(IPIW, "feature-bitmap-drop") \
+ _(STP_BLOCKED, "feature-bitmap-drop") \
+ _(LINESTATUS_DOWN, "feature-bitmap-drop") \
+ _(OUTPUT_CLASSIFY, "l2-output-classify") \
+ _(XCRW, "l2-xcrw")
+
+/* Feature bitmap positions */
+typedef enum
+{
+#define _(sym,str) L2OUTPUT_FEAT_##sym##_BIT,
+ foreach_l2output_feat
+#undef _
+ L2OUTPUT_N_FEAT,
+} l2output_feat_t;
+
+/* Feature bit masks */
+typedef enum
+{
+#define _(sym,str) L2OUTPUT_FEAT_##sym = (1<<L2OUTPUT_FEAT_##sym##_BIT),
+ foreach_l2output_feat
+#undef _
+} l2output_feat_masks_t;
+
+#define foreach_l2output_error \
+_(L2OUTPUT, "L2 output packets") \
+_(EFP_DROP, "L2 EFP filter pre-rewrite drops") \
+_(VTR_DROP, "L2 output tag rewrite drops") \
+_(SHG_DROP, "L2 split horizon drops") \
+_(DROP, "L2 output drops") \
+_(MAPPING_DROP, "L2 Output interface mapping in progress")
+
+typedef enum
+{
+ L2OUTPUT_NEXT_DROP,
+ L2OUTPUT_NEXT_BAD_INTF,
+ L2OUTPUT_N_NEXT,
+} l2output_next_t;
+
+typedef enum
+{
+#define _(sym,str) L2OUTPUT_ERROR_##sym,
+ foreach_l2output_error
+#undef _
+ L2OUTPUT_N_ERROR,
+} l2output_error_t;
+
+/* Return an array of strings containing graph node names of each feature */
+char **l2output_get_feat_names (void);
+
+
+/**
+ * The next set of functions is for use by output feature graph nodes.
+ * When the last bit has been cleared from the output feature bitmap,
+ * the next node is the output graph node for the TX sw_if_index.
+ * These functions help the feature nodes get that node index.
+ */
+
+/* Create a mapping to the output graph node for the given sw_if_index */
+u32 l2output_create_output_node_mapping (vlib_main_t * vlib_main, vnet_main_t * vnet_main, u32 node_index, /* index of current node */
+ u32 * output_node_index_vec,
+ u32 sw_if_index);
+
+/* Initialize the next node mapping table */
+always_inline void
+l2output_init_output_node_vec (u32 ** output_node_index_vec)
+{
+
+ /*
+ * Size it at 100 sw_if_indexes initially
+ * Uninitialized mappings are set to ~0
+ */
+ vec_validate_init_empty (*output_node_index_vec, 100, ~0);
+}
+
+
+/**
+ * Get a mapping from the output node mapping table,
+ * creating the entry if necessary.
+ */
+always_inline u32
+l2output_get_output_node (vlib_main_t * vlib_main, vnet_main_t * vnet_main, u32 node_index, /* index of current node */
+ u32 sw_if_index, u32 ** output_node_index_vec) /* may be updated */
+{
+ u32 next; /* index of next graph node */
+
+ /* Insure the vector is big enough */
+ vec_validate_init_empty (*output_node_index_vec, sw_if_index, ~0);
+
+ /* Get the mapping for the sw_if_index */
+ next = vec_elt (*output_node_index_vec, sw_if_index);
+
+ if (next == ~0)
+ {
+ /* Mapping doesn't exist so create it */
+ next = l2output_create_output_node_mapping (vlib_main,
+ vnet_main,
+ node_index,
+ *output_node_index_vec,
+ sw_if_index);
+ }
+
+ return next;
+}
+
+
+/** Determine the next L2 node based on the output feature bitmap */
+always_inline void
+l2_output_dispatch (vlib_main_t * vlib_main,
+ vnet_main_t * vnet_main,
+ vlib_node_runtime_t * node,
+ u32 node_index,
+ u32 * cached_sw_if_index,
+ u32 * cached_next_index,
+ l2_output_next_nodes_st * next_nodes,
+ vlib_buffer_t * b0,
+ u32 sw_if_index, u32 feature_bitmap, u32 * next0)
+{
+ if (feature_bitmap)
+ {
+ /* There are some features to execute */
+
+ /* Save bitmap for the next feature graph nodes */
+ vnet_buffer (b0)->l2.feature_bitmap = feature_bitmap;
+
+ /* Determine the next node */
+ *next0 =
+ feat_bitmap_get_next_node_index (next_nodes->feat_next_node_index,
+ feature_bitmap);
+ }
+ else
+ {
+ /*
+ * There are no features. Send packet to TX node for sw_if_index0
+ * This is a little tricky in that the output interface next node indexes
+ * are not precomputed at init time.
+ */
+
+ if (sw_if_index == *cached_sw_if_index)
+ {
+ /* We hit in the one-entry cache. Use it. */
+ *next0 = *cached_next_index;
+ }
+ else
+ {
+ /* Look up the output TX node */
+ *next0 = l2output_get_output_node (vlib_main,
+ vnet_main,
+ node_index,
+ sw_if_index,
+ &next_nodes->output_node_index_vec);
+
+ if (*next0 == L2OUTPUT_NEXT_DROP)
+ {
+ vnet_hw_interface_t *hw0;
+ hw0 = vnet_get_sup_hw_interface (vnet_main, sw_if_index);
+
+ if (hw0->flags & VNET_HW_INTERFACE_FLAG_L2OUTPUT_MAPPED)
+ b0->error = node->errors[L2OUTPUT_ERROR_MAPPING_DROP];
+ }
+
+ /* Update the one-entry cache */
+ *cached_sw_if_index = sw_if_index;
+ *cached_next_index = *next0;
+ }
+ }
+}
+
+/** Get a pointer to the config for the given interface */
+l2_output_config_t *l2output_intf_config (u32 sw_if_index);
+
+/** Enable (or disable) the feature in the bitmap for the given interface */
+void l2output_intf_bitmap_enable (u32 sw_if_index,
+ u32 feature_bitmap, u32 enable);
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */