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
216
217
218
|
/*
* Copyright (c) 2018 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 <plugins/gbp/gbp_recirc.h>
#include <plugins/gbp/gbp_endpoint_group.h>
#include <plugins/gbp/gbp_endpoint.h>
#include <vnet/dpo/dvr_dpo.h>
#include <vnet/fib/fib_table.h>
/**
* Pool of GBP recircs
*/
gbp_recirc_t *gbp_recirc_pool;
/**
* Recirc configs keyed by sw_if_index
*/
index_t *gbp_recirc_db;
int
gbp_recirc_add (u32 sw_if_index, epg_id_t epg_id, u8 is_ext)
{
gbp_recirc_t *gr;
index_t gri;
vec_validate_init_empty (gbp_recirc_db, sw_if_index, INDEX_INVALID);
gri = gbp_recirc_db[sw_if_index];
if (INDEX_INVALID == gri)
{
gbp_endpoint_group_t *gepg;
fib_protocol_t fproto;
pool_get (gbp_recirc_pool, gr);
memset (gr, 0, sizeof (*gr));
gri = gr - gbp_recirc_pool;
gr->gr_epg = epg_id;
gr->gr_is_ext = is_ext;
gr->gr_sw_if_index = sw_if_index;
/*
* IP enable the recirc interface
*/
ip4_sw_interface_enable_disable (gr->gr_sw_if_index, 1);
ip6_sw_interface_enable_disable (gr->gr_sw_if_index, 1);
/*
* cache the FIB indicies of the EPG
*/
gepg = gbp_endpoint_group_find (gr->gr_epg);
if (NULL == gepg)
return (VNET_API_ERROR_NO_SUCH_ENTRY);
FOR_EACH_FIB_IP_PROTOCOL (fproto)
{
gr->gr_fib_index[fproto] = gepg->gepg_fib_index[fproto];
}
/*
* Packets on the recirculation interface are subjet to src-EPG
* classification. Recirc interfaces are L2-emulation mode.
* for internal EPGs this is via an LPM on all external subnets.
* for external EPGs this is via a port mapping.
*/
if (gr->gr_is_ext)
{
/*
* recirc is for post-NAT translation packets going into
* the external EPG, these are classified to the NAT EPG
* based on its port
*/
gbp_endpoint_update (gr->gr_sw_if_index,
NULL, NULL, gr->gr_epg, &gr->gr_ep);
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-src-classify",
gr->gr_sw_if_index, 1, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-src-classify",
gr->gr_sw_if_index, 1, 0, 0);
}
else
{
/*
* recirc is for pre-NAT translation packets coming from
* the external EPG, these are classified based on a LPM
* in the EPG's route-domain
*/
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-lpm-classify",
gr->gr_sw_if_index, 1, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-lpm-classify",
gr->gr_sw_if_index, 1, 0, 0);
}
gbp_recirc_db[sw_if_index] = gri;
}
return (0);
}
void
gbp_recirc_delete (u32 sw_if_index)
{
gbp_recirc_t *gr;
index_t gri;
gri = gbp_recirc_db[sw_if_index];
if (INDEX_INVALID != gri)
{
gr = pool_elt_at_index (gbp_recirc_pool, gri);
if (gr->gr_is_ext)
{
gbp_endpoint_delete (gr->gr_ep);
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-src-classify",
gr->gr_sw_if_index, 0, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-src-classify",
gr->gr_sw_if_index, 0, 0, 0);
}
else
{
vnet_feature_enable_disable ("ip4-unicast",
"ip4-gbp-lpm-classify",
gr->gr_sw_if_index, 0, 0, 0);
vnet_feature_enable_disable ("ip6-unicast",
"ip6-gbp-lpm-classify",
gr->gr_sw_if_index, 0, 0, 0);
}
ip4_sw_interface_enable_disable (gr->gr_sw_if_index, 0);
ip6_sw_interface_enable_disable (gr->gr_sw_if_index, 0);
gbp_recirc_db[sw_if_index] = INDEX_INVALID;
pool_put (gbp_recirc_pool, gr);
}
}
void
gbp_recirc_walk (gbp_recirc_cb_t cb, void *ctx)
{
gbp_recirc_t *gbpe;
/* *INDENT-OFF* */
pool_foreach(gbpe, gbp_recirc_pool,
{
if (!cb(gbpe, ctx))
break;
});
/* *INDENT-ON* */
}
static int
gbp_recirc_show_one (gbp_recirc_t * gr, void *ctx)
{
vnet_main_t *vnm = vnet_get_main ();
vlib_main_t *vm;
vm = ctx;
vlib_cli_output (vm, " %U, epg:%d, ext:%d",
format_vnet_sw_if_index_name, vnm,
gr->gr_sw_if_index, gr->gr_epg, gr->gr_is_ext);
return (1);
}
static clib_error_t *
gbp_recirc_show (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "Recirculation-Interfaces:");
gbp_recirc_walk (gbp_recirc_show_one, vm);
return (NULL);
}
/*?
* Show Group Based Policy Recircs and derived information
*
* @cliexpar
* @cliexstart{show gbp recirc}
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_recirc_show_node, static) = {
.path = "show gbp recirc",
.short_help = "show gbp recirc\n",
.function = gbp_recirc_show,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
