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Vector Packet Processing
mpls_fib.h
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1 /*
2  * mpls_fib.h: The Label/MPLS FIB
3  *
4  * Copyright (c) 2012 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef __MPLS_FIB_TABLE_H__
19 #define __MPLS_FIB_TABLE_H__
20 
21 #include <vnet/vnet.h>
22 #include <vnet/mpls/mpls.h>
23 #include <vnet/fib/fib_types.h>
24 #include <vnet/dpo/dpo.h>
25 #include <vnet/mpls/mpls.h>
26 #include <vnet/fib/fib_table.h>
27 
28 static inline mpls_fib_t*
30 {
31  if (!pool_is_free_index(mpls_main.fibs, index))
32  return (&(pool_elt_at_index(mpls_main.fibs, index)->mpls));
33  return (NULL);
34 }
35 
38 // extern mpls_fib_t * mpls_fib_find(u32 table_id);
39 extern u32 mpls_fib_index_from_table_id(u32 table_id);
40 
41 extern u8 *format_mpls_fib_table_name(u8 * s, va_list * args);
42 
44  u32 table_id,
45  mpls_label_t label,
46  mpls_eos_bit_t eos,
47  fib_node_index_t fib_entry_index);
48 
49 
51  mpls_label_t label,
52  mpls_eos_bit_t eos);
53 
55  mpls_label_t label,
56  mpls_eos_bit_t eos);
58  mpls_label_t label,
59  mpls_eos_bit_t eos,
60  fib_node_index_t fei);
61 extern void mpls_fib_table_destroy(mpls_fib_t *mf);
62 
63 
64 
66  mpls_label_t label,
67  mpls_eos_bit_t eos,
68  const dpo_id_t *dpo);
70  mpls_label_t label,
71  mpls_eos_bit_t eos);
72 
73 /**
74  * @brief
75  * Lookup a label and EOS bit in the MPLS_FIB table to retrieve the
76  * load-balance index to be used for packet forwarding.
77  */
78 static inline index_t
80  const mpls_unicast_header_t *hdr)
81 {
82  mpls_label_t label;
83  mpls_fib_t *mf;
84  u32 key;
85 
86  label = clib_net_to_host_u32(hdr->label_exp_s_ttl);
87  key = (vnet_mpls_uc_get_label(label) << 1) | vnet_mpls_uc_get_s(label);
88 
89  mf = mpls_fib_get(mpls_fib_index);
90 
91  return (mf->mf_lbs[key]);
92 }
93 
94 static inline u32
96 {
97  mpls_main_t *mm = &mpls_main;
98 
99  ASSERT(vec_len(mm->fib_index_by_sw_if_index) > sw_if_index);
100 
101  return (mm->fib_index_by_sw_if_index[sw_if_index]);
102 }
103 
105 
106 #endif
#define NULL
Definition: clib.h:55
u32 * fib_index_by_sw_if_index
Definition: mpls.h:65
u32 mpls_label_t
A label value only, i.e.
Definition: packet.h:24
u32 index_t
A Data-Path Object is an object that represents actions that are applied to packets are they are swit...
Definition: dpo.h:41
void mpls_fib_forwarding_table_update(mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos, const dpo_id_t *dpo)
Definition: mpls_fib.c:312
u32 mpls_fib_index_from_table_id(u32 table_id)
Definition: mpls_fib.c:77
void mpls_fib_table_destroy(mpls_fib_t *mf)
Definition: mpls_fib.c:243
fib_node_index_t mpls_fib_table_entry_add_from_ip_fib_entry(u32 table_id, mpls_label_t label, mpls_eos_bit_t eos, fib_node_index_t fib_entry_index)
static u32 mpls_fib_table_get_index_for_sw_if_index(u32 sw_if_index)
Definition: mpls_fib.h:95
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:138
fib_node_index_t mpls_fib_table_lookup(const mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
Definition: mpls_fib.c:280
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
static u32 vnet_mpls_uc_get_label(mpls_label_t label_exp_s_ttl)
Definition: packet.h:77
flow_hash_config_t mpls_fib_table_get_flow_hash_config(u32 fib_index)
Definition: mpls_fib.c:339
struct fib_table_t_ * fibs
A pool of all the MPLS FIBs.
Definition: mpls.h:68
u8 * format_mpls_fib_table_name(u8 *s, va_list *args)
mpls_main_t mpls_main
Definition: mpls.c:25
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:28
void mpls_fib_table_entry_insert(mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos, fib_node_index_t fei)
Definition: mpls_fib.c:295
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:211
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
static mpls_fib_t * mpls_fib_get(fib_node_index_t index)
Definition: mpls_fib.h:29
void mpls_fib_table_entry_remove(mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
Definition: mpls_fib.c:304
mpls_label_t label_exp_s_ttl
Definition: packet.h:31
u32 flow_hash_config_t
A flow hash configuration is a mask of the flow hash options.
Definition: lookup.h:160
u32 mpls_fib_table_create_and_lock(void)
Definition: mpls_fib.c:237
void mpls_fib_forwarding_table_reset(mpls_fib_t *mf, mpls_label_t label, mpls_eos_bit_t eos)
Definition: mpls_fib.c:327
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static u32 vnet_mpls_uc_get_s(mpls_label_t label_exp_s_ttl)
Definition: packet.h:87
unsigned char u8
Definition: types.h:56
static index_t mpls_fib_table_forwarding_lookup(u32 mpls_fib_index, const mpls_unicast_header_t *hdr)
Lookup a label and EOS bit in the MPLS_FIB table to retrieve the load-balance index to be used for pa...
Definition: mpls_fib.h:79
index_t mf_lbs[MPLS_FIB_DB_SIZE]
The load-balance indeices keyed by 21 bit label+eos bit.
Definition: mpls.h:53
u32 mpls_fib_table_find_or_create_and_lock(u32 table_id)
Definition: mpls_fib.c:224
enum mpls_eos_bit_t_ mpls_eos_bit_t