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authorNeale Ranns <nranns@cisco.com>2017-10-21 10:53:20 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-11-09 15:16:52 +0000
commitd792d9c01e60656cbfe1b0f1fd6a9b125f5dab0c (patch)
treedb88d99dd8102389fb92e8ed44bc7d6a55dc3080 /src/vnet/bier/bier_entry.h
parenta2ff7b8cfc829ffbb6d5de7534efb51f7cba9cf3 (diff)
BIER
- see draft-ietf-bier-mpls-encapsulation-10 - midpoint, head and tail functions - supported payload protocols; IPv4 and IPv6 only. Change-Id: I59d7363bb6fdfdce8e4016a68a9c8f5a5e5791cb Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/bier/bier_entry.h')
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diff --git a/src/vnet/bier/bier_entry.h b/src/vnet/bier/bier_entry.h
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+/*
+ * Copyright (c) 2016 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.
+ */
+/**
+ * bier_entry : The BIER entry
+ *
+ * The interface to the BIER entry is through a bier_entry_t* rather
+ * than an index. This is becuase the BIER table allocates the entries
+ * in a contiguous array once and only once when the table is created.
+ * this is done for forwarding performance. The entry is thus not subject
+ * to realloc, and does not need to be malloc'd when a route to that
+ * bit-position is first learned.
+ *
+ */
+
+#ifndef __BIER_ENTRY_H__
+#define __BIER_ENTRY_H__
+
+#include <vlib/vlib.h>
+#include <vnet/fib/fib_node.h>
+#include <vnet/bier/bier_types.h>
+
+/**
+ * Forward declarations
+ */
+struct bier_route_update_t_;
+struct bier_fmask_db_t_;
+
+/**
+ * The BIER entry
+ *
+ * the BIER entry is the representation of a BIER forwarding egress router (BFER)
+ * (or the egress PE) that is assigned a bit position.
+ */
+typedef struct bier_entry_t_ {
+ /**
+ * linkage into the FIB graph
+ */
+ fib_node_t be_node;
+
+ /**
+ * The index of the BIER table in which this entry resides
+ */
+ index_t be_bti;
+
+ /**
+ * the bit position this entry represents.
+ * this is the key table insertion
+ */
+ bier_bp_t be_bp;
+
+ /**
+ * the FIB path-list this entry resolves through.
+ * the path-list is itself resoved on the entry's fmasks
+ */
+ fib_node_index_t be_path_list;
+ /**
+ * sibling index on the path list
+ */
+ fib_node_index_t be_sibling_index;
+} bier_entry_t;
+
+extern index_t bier_entry_create(index_t bti,
+ bier_bp_t bp);
+extern void bier_entry_delete(index_t bei);
+
+extern void bier_entry_path_add(index_t bei,
+ const fib_route_path_t *brp);
+
+extern int bier_entry_path_remove(index_t bei,
+ const fib_route_path_t *brp);
+
+extern u8* format_bier_entry(u8* s, va_list *ap);
+
+extern void bier_entry_contribute_forwarding(index_t bei,
+ dpo_id_t *dpo);
+
+extern bier_entry_t *bier_entry_pool;
+always_inline bier_entry_t* bier_entry_get(index_t bei)
+{
+ return (&bier_entry_pool[bei]);
+}
+#endif