1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* 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.
*/
#include <vnet/bier/bier_disp_table.h>
#include <vnet/bier/bier_hdr_inlines.h>
/**
* @brief A struct to hold tracing information for the MPLS label imposition
* node.
*/
typedef struct bier_disp_lookup_trace_t_
{
/**
* BIER source BP used in the lookup - host order
*/
bier_bp_t bp;
/**
* BIER disp table
*/
index_t bdti;
} bier_disp_lookup_trace_t;
/**
* Next nodes from BIER disposition lookup
*/
typedef enum bier_disp_lookup_next_t_
{
BIER_DISP_LOOKUP_NEXT_DROP,
BIER_DISP_LOOKUP_NEXT_DISPATCH,
} bier_disp_lookup_next_t;
#define BIER_DISP_LOOKUP_N_NEXT (BIER_DISP_LOOKUP_NEXT_DISPATCH+1)
always_inline uword
bier_disp_lookup_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
u32 n_left_from, next_index, * from, * to_next;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
const bier_hdr_t *hdr0;
bier_hdr_src_id_t src0;
vlib_buffer_t * b0;
u32 bdei0, bdti0;
u32 next0, bi0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
bdti0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
hdr0 = vlib_buffer_get_current(b0);
/*
* lookup - source is in network order.
*/
src0 = bier_hdr_get_src_id(hdr0);
next0 = BIER_DISP_LOOKUP_NEXT_DISPATCH;
bdei0 = bier_disp_table_lookup(bdti0, src0);
if (PREDICT_FALSE(INDEX_INVALID == bdei0))
{
/*
* if a specific match misses, try the default
*/
bdei0 = bier_disp_table_lookup(bdti0, 0);
if (PREDICT_FALSE(INDEX_INVALID == bdei0))
{
next0 = BIER_DISP_LOOKUP_NEXT_DROP;
}
}
vnet_buffer(b0)->ip.adj_index[VLIB_TX] = bdei0;
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
bier_disp_lookup_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->bp = clib_net_to_host_u16(bier_hdr_get_src_id(hdr0));
tr->bdti = bdti0;
}
vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return from_frame->n_vectors;
}
static u8 *
format_bier_disp_lookup_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
bier_disp_lookup_trace_t * t;
t = va_arg (*args, bier_disp_lookup_trace_t *);
s = format (s, "tbl:%d src:%d", t->bdti, t->bp);
return (s);
}
static uword
bier_disp_lookup (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return (bier_disp_lookup_inline(vm, node, frame));
}
VLIB_REGISTER_NODE (bier_disp_lookup_node) = {
.function = bier_disp_lookup,
.name = "bier-disp-lookup",
.vector_size = sizeof (u32),
.format_trace = format_bier_disp_lookup_trace,
.n_next_nodes = BIER_DISP_LOOKUP_N_NEXT,
.next_nodes = {
[BIER_DISP_LOOKUP_NEXT_DROP] = "bier-drop",
[BIER_DISP_LOOKUP_NEXT_DISPATCH] = "bier-disp-dispatch",
}
};
VLIB_NODE_FUNCTION_MULTIARCH (bier_disp_lookup_node, bier_disp_lookup)
|
