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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* Copyright (c) 2020 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/adj/adj_delegate.h>
#include <linux-cp/lcp_adj.h>
#include <vppinfra/bihash_32_8.h>
#include <vppinfra/bihash_template.c>
static adj_delegate_type_t adj_type;
static lcp_adj_key_t *adj_keys;
/**
* The table of adjacencies indexed by the rewrite string
*/
BVT (clib_bihash) lcp_adj_tbl;
static_always_inline void
lcp_adj_mk_key_adj (const ip_adjacency_t *adj, lcp_adj_key_t *key)
{
lcp_adj_mk_key (adj->rewrite_header.data, adj->rewrite_header.data_bytes,
adj->rewrite_header.sw_if_index, key);
}
static u8 *
lcp_adj_delegate_format (const adj_delegate_t *aed, u8 *s)
{
return (format (s, "lcp"));
}
static void
lcp_adj_delegate_adj_deleted (adj_delegate_t *aed)
{
ip_adjacency_t *adj;
lcp_adj_kv_t kv;
adj = adj_get (aed->ad_adj_index);
lcp_adj_mk_key_adj (adj, &kv.k);
BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 0);
if (aed->ad_index != INDEX_INVALID)
pool_put_index (adj_keys, aed->ad_index);
}
/* when an adj is modified:
*
* An existing hash entry may need to be deleted. This may occur when:
* * The newly modified adj does not have IP_LOOKUP_NEXT_REWRITE as next idx
* * The rewrite (== major component of hash key) changed
*
* A new hash entry may need to be added. This may occur when:
* * The newly modified adj has IP_LOOKUP_NEXT_REWRITE as next idx
* * The rewrite changed or there was no existing hash entry
*/
static void
lcp_adj_delegate_adj_modified (adj_delegate_t *aed)
{
ip_adjacency_t *adj;
lcp_adj_kv_t kv;
lcp_adj_key_t *adj_key = NULL;
u8 save_adj, key_changed;
key_changed = 0;
adj = adj_get (aed->ad_adj_index);
save_adj = (IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index);
if (aed->ad_index != INDEX_INVALID)
adj_key = pool_elt_at_index (adj_keys, aed->ad_index);
/* return if there was no stored adj and we will not add one */
if (!adj_key && !save_adj)
return;
/* build kv if a new entry should be stored */
if (save_adj)
{
lcp_adj_mk_key_adj (adj, &kv.k);
kv.v = aed->ad_adj_index;
if (adj_key)
key_changed = (clib_memcmp (adj_key, &kv.k, sizeof (*adj_key)) != 0);
}
/* delete old entry if needed */
if (adj_key && ((save_adj && key_changed) || (!save_adj)))
{
lcp_adj_kv_t old_kv;
clib_memcpy_fast (&old_kv.k, adj_key, sizeof (*adj_key));
old_kv.v = 0;
BV (clib_bihash_add_del) (&lcp_adj_tbl, &old_kv.kv, 0);
if (!save_adj)
{
pool_put (adj_keys, adj_key);
aed->ad_index = INDEX_INVALID;
}
}
/* add new entry if needed */
if (save_adj)
{
BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 1);
if (!adj_key)
{
pool_get (adj_keys, adj_key);
aed->ad_index = adj_key - adj_keys;
}
clib_memcpy_fast (adj_key, &kv.k, sizeof (*adj_key));
}
}
static void
lcp_adj_delegate_adj_created (adj_index_t ai)
{
ip_adjacency_t *adj;
lcp_adj_kv_t kv;
index_t lai = INDEX_INVALID;
lcp_adj_key_t *adj_key;
adj = adj_get (ai);
if (IP_LOOKUP_NEXT_REWRITE == adj->lookup_next_index)
{
lcp_adj_mk_key_adj (adj, &kv.k);
pool_get (adj_keys, adj_key);
clib_memcpy_fast (adj_key, &kv.k, sizeof (*adj_key));
kv.v = ai;
BV (clib_bihash_add_del) (&lcp_adj_tbl, &kv.kv, 1);
lai = adj_key - adj_keys;
}
adj_delegate_add (adj, adj_type, lai);
}
u8 *
format_lcp_adj_kvp (u8 *s, va_list *args)
{
BVT (clib_bihash_kv) *kv = va_arg (*args, BVT (clib_bihash_kv) *);
CLIB_UNUSED (int verbose) = va_arg (*args, int);
lcp_adj_kv_t *akv = (lcp_adj_kv_t *) kv;
s = format (s, " %U:%U\n %U", format_vnet_sw_if_index_name,
vnet_get_main (), akv->k.sw_if_index, format_hex_bytes,
akv->k.rewrite, 18, format_adj_nbr, akv->v, 4);
return (s);
}
static clib_error_t *
lcp_adj_show_cmd (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
u8 verbose = 0;
if (unformat (input, "verbose"))
verbose = 1;
vlib_cli_output (vm, "Linux-CP Adjs:\n%U", BV (format_bihash), &lcp_adj_tbl,
verbose);
return 0;
}
VLIB_CLI_COMMAND (lcp_itf_pair_show_cmd_node, static) = {
.path = "show lcp adj",
.function = lcp_adj_show_cmd,
.short_help = "show lcp adj",
.is_mp_safe = 1,
};
const adj_delegate_vft_t lcp_adj_vft = {
.adv_format = lcp_adj_delegate_format,
.adv_adj_deleted = lcp_adj_delegate_adj_deleted,
.adv_adj_modified = lcp_adj_delegate_adj_modified,
.adv_adj_created = lcp_adj_delegate_adj_created,
};
static clib_error_t *
lcp_adj_init (vlib_main_t *vm)
{
adj_type = adj_delegate_register_new_type (&lcp_adj_vft);
BV (clib_bihash_init) (&lcp_adj_tbl, "linux-cp ADJ table", 1024, 1 << 24);
BV (clib_bihash_set_kvp_format_fn) (&lcp_adj_tbl, format_lcp_adj_kvp);
return (NULL);
}
VLIB_INIT_FUNCTION (lcp_adj_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
