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 #include <vnet/mpls/mpls_types.h>
17 #include <vnet/dpo/drop_dpo.h>
19 #include <vnet/fib/fib_table.h>
20 #include <vnet/fib/fib_entry.h>
21 #include <vnet/fib/fib_entry_src.h>
22 #include <vnet/fib/mpls_fib.h>
25 * Source initialisation Function
28 fib_entry_src_mpls_init (fib_entry_src_t *src)
32 src->fes_flags = FIB_ENTRY_SRC_FLAG_NONE;
33 src->u.mpls.fesm_label = MPLS_LABEL_INVALID;
35 FOR_EACH_MPLS_EOS_BIT(eos)
37 src->u.mpls.fesm_lfes[eos] = FIB_NODE_INDEX_INVALID;
42 * Source deinitialisation Function
45 fib_entry_src_mpls_deinit (fib_entry_src_t *src)
50 fib_entry_src_mpls_remove (fib_entry_src_t *src)
52 src->fes_pl = FIB_NODE_INDEX_INVALID;
53 src->u.mpls.fesm_label = MPLS_LABEL_INVALID;
57 fib_entry_src_mpls_add (fib_entry_src_t *src,
58 const fib_entry_t *entry,
59 fib_entry_flag_t flags,
64 fib_path_list_create_special(proto,
65 FIB_PATH_LIST_FLAG_DROP,
70 fib_entry_src_mpls_set_data (fib_entry_src_t *src,
71 const fib_entry_t *entry,
74 fib_protocol_t payload_proto;
80 * post MPLS table alloc and the possible rea-alloc of fib entrys
81 * the entry pointer will no longer be valid. so save its index
83 payload_proto = entry->fe_prefix.fp_proto;
84 fei = fib_entry_get_index(entry);
85 label = *(mpls_label_t*)data;
87 if (MPLS_LABEL_INVALID == label)
90 * removing the local label
92 FOR_EACH_MPLS_EOS_BIT(eos)
94 fib_table_entry_delete_index(src->u.mpls.fesm_lfes[eos],
97 fib_table_unlock(MPLS_FIB_DEFAULT_TABLE_ID,
100 src->u.mpls.fesm_label = label;
104 fib_prefix_t prefix = {
105 .fp_proto = FIB_PROTOCOL_MPLS,
108 fib_node_index_t fib_index;
109 dpo_id_t dpo = DPO_INVALID;
112 * adding a new local label. make sure the MPLS fib exists.
114 if (MPLS_LABEL_INVALID == src->u.mpls.fesm_label)
117 fib_table_find_or_create_and_lock(FIB_PROTOCOL_MPLS,
118 MPLS_FIB_DEFAULT_TABLE_ID,
123 fib_index = mpls_fib_index_from_table_id(MPLS_FIB_DEFAULT_TABLE_ID);
126 * if this is a change in label, reomve the old one first
128 if (src->u.mpls.fesm_label != label)
130 FOR_EACH_MPLS_EOS_BIT(eos)
132 ASSERT(FIB_NODE_INDEX_INVALID != src->u.mpls.fesm_lfes[eos]);
133 fib_table_entry_delete_index(src->u.mpls.fesm_lfes[eos],
139 src->u.mpls.fesm_label = label;
141 FOR_EACH_MPLS_EOS_BIT(eos)
144 prefix.fp_payload_proto = fib_proto_to_dpo(payload_proto);
146 fib_entry_contribute_forwarding(fei,
148 FIB_FORW_CHAIN_TYPE_MPLS_EOS :
149 FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS),
151 src->u.mpls.fesm_lfes[eos] =
152 fib_table_entry_special_dpo_add(fib_index,
155 FIB_ENTRY_FLAG_EXCLUSIVE,
163 fib_entry_src_mpls_get_data (fib_entry_src_t *src,
164 const fib_entry_t *entry)
166 return (&(src->u.mpls.fesm_label));
170 fib_entry_src_mpls_format (fib_entry_src_t *src,
173 return (format(s, " local-label:%d", src->u.mpls.fesm_label));
176 const static fib_entry_src_vft_t mpls_src_vft = {
177 .fesv_init = fib_entry_src_mpls_init,
178 .fesv_deinit = fib_entry_src_mpls_deinit,
179 .fesv_add = fib_entry_src_mpls_add,
180 .fesv_remove = fib_entry_src_mpls_remove,
181 .fesv_format = fib_entry_src_mpls_format,
182 .fesv_set_data = fib_entry_src_mpls_set_data,
183 .fesv_get_data = fib_entry_src_mpls_get_data,
185 * .fesv_fwd_update = fib_entry_src_mpls_fwd_update,
186 * When the forwarding for the IP entry is updated, any MPLS chains
187 * it has created are also updated. Since the MPLS entry will have already
188 * installed that chain/load-balance there is no need to update the netry
189 * FIXME: later: propagate any walk to the children of the MPLS entry. for SR
194 fib_entry_src_mpls_register (void)
196 fib_entry_src_register(FIB_SOURCE_MPLS, &mpls_src_vft);