2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __FIB_ENTRY_DELEGATE_T__
17 #define __FIB_ENTRY_DELEGATE_T__
19 #include <vnet/fib/fib_node.h>
20 #include <vnet/fib/fib_entry.h>
25 typedef enum fib_entry_delegate_type_t_ {
27 * Forwarding chain types:
28 * for the vast majority of FIB entries only one chain is required - the
29 * one that forwards traffic matching the fib_entry_t's fib_prefix_t. For those
30 * fib_entry_t that are a resolution target for other fib_entry_t's they will also
31 * need the chain to provide forwarding for those children. We store these additional
32 * chains in delegates to save memory in the common case.
34 FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4 = FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
35 FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP6 = FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
36 FIB_ENTRY_DELEGATE_CHAIN_MPLS_EOS = FIB_FORW_CHAIN_TYPE_MPLS_EOS,
37 FIB_ENTRY_DELEGATE_CHAIN_MPLS_NON_EOS = FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
38 FIB_ENTRY_DELEGATE_CHAIN_ETHERNET = FIB_FORW_CHAIN_TYPE_ETHERNET,
39 FIB_ENTRY_DELEGATE_CHAIN_NSH = FIB_FORW_CHAIN_TYPE_NSH,
41 * Dependency list of covered entries.
42 * these are more specific entries that are interested in changes
43 * to their respective cover
45 FIB_ENTRY_DELEGATE_COVERED,
49 FIB_ENTRY_DELEGATE_BFD,
53 FIB_ENTRY_DELEGATE_TRACK,
55 * Attached import/export functionality
57 FIB_ENTRY_DELEGATE_ATTACHED_IMPORT,
58 FIB_ENTRY_DELEGATE_ATTACHED_EXPORT,
59 } fib_entry_delegate_type_t;
61 #define FOR_EACH_DELEGATE_CHAIN(_entry, _fdt, _fed, _body) \
63 for (_fdt = FIB_ENTRY_DELEGATE_CHAIN_UNICAST_IP4; \
64 _fdt <= FIB_ENTRY_DELEGATE_CHAIN_NSH; \
67 _fed = fib_entry_delegate_find(_entry, _fdt); \
75 * Distillation of the BFD session states into a go/no-go for using
76 * the associated tracked FIB entry
78 typedef enum fib_bfd_state_t_
85 * State for FIB entry tracking
87 typedef struct fib_entry_delegate_track_t_
91 } fib_entry_delegate_track_t;
94 * A Delagate is a means to implmenet the Delagation design pattern; the extension of an
95 * objects functionality through the composition of, and delgation to, other objects.
96 * These 'other' objects are delegates. Delagates are thus attached to other FIB objects
97 * to extend their functionality.
99 typedef struct fib_entry_delegate_t_
102 * The FIB entry object to which the delagate is attached
104 fib_node_index_t fd_entry_index;
109 fib_entry_delegate_type_t fd_type;
112 * A union of data for the different delegate types
113 * These delegates are stored in a sparse vector on the entry, so they
114 * must all be of the same size. We could use indirection here for all types,
115 * i.e. store an index, that's ok for large delegates, like the attached export
116 * but for the chain delegates it's excessive
121 * Valid for the forwarding chain delegates. The LB that is built.
126 * Valid for the attached import cases. An index of the importer/exporter
128 fib_node_index_t fd_index;
131 * For the cover tracking. The node list;
133 fib_node_list_t fd_list;
138 fib_bfd_state_t fd_bfd_state;
143 fib_entry_delegate_track_t fd_track;
145 } fib_entry_delegate_t;
149 extern void fib_entry_delegate_remove(fib_entry_t *fib_entry,
150 fib_entry_delegate_type_t type);
152 extern fib_entry_delegate_t *fib_entry_delegate_find_or_add(fib_entry_t *fib_entry,
153 fib_entry_delegate_type_t fdt);
154 extern fib_entry_delegate_t *fib_entry_delegate_find(const fib_entry_t *fib_entry,
155 fib_entry_delegate_type_t type);
157 extern fib_forward_chain_type_t fib_entry_delegate_type_to_chain_type(
158 fib_entry_delegate_type_t type);
160 extern fib_entry_delegate_type_t fib_entry_chain_type_to_delegate_type(
161 fib_forward_chain_type_t type);
163 extern u8 *format_fib_entry_delegate(u8 * s, va_list * args);
165 extern fib_node_index_t fib_entry_delegate_get_index (const fib_entry_delegate_t *fed);
166 extern fib_entry_delegate_t * fib_entry_delegate_get (fib_node_index_t fedi);