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Neale Ranns5e575b12016-10-03 09:40:25 +01001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15
16#include <vnet/lisp-gpe/lisp_gpe_tenant.h>
17
18/**
19 * The pool of all tenants
20 */
21static lisp_gpe_tenant_t *lisp_gpe_tenant_pool;
22
23/**
24 * The hash table of all tenants: key:{VNI}.
25 */
26uword *lisp_gpe_tenant_db;
27
28static lisp_gpe_tenant_t *
29lisp_gpe_tenant_find (u32 vni)
30{
31 uword *p;
32
33 p = hash_get (lisp_gpe_tenant_db, vni);
34
35 if (NULL == p)
36 return (NULL);
37
38 return (pool_elt_at_index (lisp_gpe_tenant_pool, p[0]));
39}
40
41static lisp_gpe_tenant_t *
42lisp_gpe_tenant_find_or_create_i (u32 vni)
43{
44 lisp_gpe_tenant_t *lt;
45
46 lt = lisp_gpe_tenant_find (vni);
47
48 if (NULL == lt)
49 {
50 pool_get (lisp_gpe_tenant_pool, lt);
51 memset (lt, 0, sizeof (*lt));
52
53 lt->lt_vni = vni;
54 lt->lt_table_id = ~0;
55 lt->lt_bd_id = ~0;
56
57 hash_set (lisp_gpe_tenant_db, vni, lt - lisp_gpe_tenant_pool);
58 }
59
60 return (lt);
61}
62
63/**
64 * @brief Find or create a tenant for the given VNI
65 */
66u32
67lisp_gpe_tenant_find_or_create (u32 vni)
68{
69 lisp_gpe_tenant_t *lt;
70
71 lt = lisp_gpe_tenant_find (vni);
72
73 if (NULL == lt)
74 {
75 lt = lisp_gpe_tenant_find_or_create_i (vni);
76 }
77
78 return (lt - lisp_gpe_tenant_pool);
79}
80
81/**
82 * @brief If there are no more locks/users of te tenant, then delete it
83 */
84static void
85lisp_gpe_tenant_delete_if_empty (lisp_gpe_tenant_t * lt)
86{
87 int i;
88
89 for (i = 0; i < LISP_GPE_TENANT_LOCK_NUM; i++)
90 {
91 if (lt->lt_locks[i])
92 return;
93 }
94
95 hash_unset (lisp_gpe_tenant_db, lt->lt_vni);
96 pool_put (lisp_gpe_tenant_pool, lt);
97}
98
99/**
100 * @brief Add/create and lock a new or find and lock the existing L3
101 * interface for the tenant
102 *
103 * @paran vni The tenant's VNI
104 * @param table_id the Tenant's L3 table ID.
105 *
106 * @return the SW IF index of the L3 interface
107 */
108u32
109lisp_gpe_tenant_l3_iface_add_or_lock (u32 vni, u32 table_id)
110{
111 lisp_gpe_tenant_t *lt;
112
113 lt = lisp_gpe_tenant_find_or_create_i (vni);
114
115 if (~0 == lt->lt_table_id)
116 lt->lt_table_id = table_id;
117
118 ASSERT (lt->lt_table_id == table_id);
119
120 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
121 {
122 /* create the l3 interface since there are currently no users of it */
123 lt->lt_l3_sw_if_index =
124 lisp_gpe_add_l3_iface (&lisp_gpe_main, vni, table_id);
125 }
126
127 lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE]++;
128
129 return (lt->lt_l3_sw_if_index);
130}
131
132/**
133 * @brief Release the lock held on the tenant's L3 interface
134 */
135void
136lisp_gpe_tenant_l3_iface_unlock (u32 vni)
137{
138 lisp_gpe_tenant_t *lt;
139
140 lt = lisp_gpe_tenant_find (vni);
141
142 if (NULL == lt)
143 {
144 clib_warning ("No tenant for VNI %d", vni);
Neale Ranns5899fde2016-10-12 13:51:05 +0100145 return;
Neale Ranns5e575b12016-10-03 09:40:25 +0100146 }
147
148 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
149 {
150 clib_warning ("No L3 interface for tenant VNI %d", vni);
151 return;
152 }
153
154 lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE]--;
155
156 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L3_IFACE])
157 {
158 /* the last user has gone, so delete the l3 interface */
159 lisp_gpe_del_l3_iface (&lisp_gpe_main, vni, lt->lt_table_id);
160 }
161
162 /*
163 * If there are no more locks on any tenant managed resource, then
164 * this tenant is toast.
165 */
166 lisp_gpe_tenant_delete_if_empty (lt);
167}
168
169/**
170 * @brief Add/create and lock a new or find and lock the existing L2
171 * interface for the tenant
172 *
173 * @paran vni The tenant's VNI
174 * @param table_id the Tenant's L2 Bridge Domain ID.
175 *
176 * @return the SW IF index of the L2 interface
177 */
178u32
179lisp_gpe_tenant_l2_iface_add_or_lock (u32 vni, u32 bd_id)
180{
181 lisp_gpe_tenant_t *lt;
182
183 lt = lisp_gpe_tenant_find_or_create_i (vni);
184
185 if (NULL == lt)
186 {
187 clib_warning ("No tenant for VNI %d", vni);
188 return ~0;
189 }
190
191 if (~0 == lt->lt_bd_id)
192 lt->lt_bd_id = bd_id;
193
194 ASSERT (lt->lt_bd_id == bd_id);
195
196 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
197 {
198 /* create the l2 interface since there are currently no users of it */
199 lt->lt_l2_sw_if_index =
200 lisp_gpe_add_l2_iface (&lisp_gpe_main, vni, bd_id);
201 }
202
203 lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE]++;
204
205 return (lt->lt_l2_sw_if_index);
206}
207
208/**
209 * @brief Release the lock held on the tenant's L3 interface
210 */
211void
212lisp_gpe_tenant_l2_iface_unlock (u32 vni)
213{
214 lisp_gpe_tenant_t *lt;
215
216 lt = lisp_gpe_tenant_find (vni);
217
218 if (NULL == lt)
219 {
220 clib_warning ("No tenant for VNI %d", vni);
221 return;
222 }
223
224 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
225 {
226 clib_warning ("No L2 interface for tenant VNI %d", vni);
227 return;
228 }
229
230 lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE]--;
231
232 if (0 == lt->lt_locks[LISP_GPE_TENANT_LOCK_L2_IFACE])
233 {
234 /* the last user has gone, so delete the l2 interface */
235 lisp_gpe_del_l2_iface (&lisp_gpe_main, vni, lt->lt_bd_id);
236 }
237
238 /*
239 * If there are no more locks on any tenant managed resource, then
240 * this tenant is toast.
241 */
242 lisp_gpe_tenant_delete_if_empty (lt);
243}
244
245/**
246 * @brief get a const pointer to the tenant object
247 */
248const lisp_gpe_tenant_t *
249lisp_gpe_tenant_get (u32 index)
250{
251 return (pool_elt_at_index (lisp_gpe_tenant_pool, index));
252}
253
254/**
255 * @brief Flush/delete ALL the tenants
256 */
257void
258lisp_gpe_tenant_flush (void)
259{
260 lisp_gpe_tenant_t *lt;
261
262 /* *INDENT-OFF* */
263 pool_foreach(lt, lisp_gpe_tenant_pool,
264 ({
265 lisp_gpe_tenant_l2_iface_unlock(lt->lt_vni);
266 lisp_gpe_tenant_l3_iface_unlock(lt->lt_vni);
267 }));
268 /* *INDENT-ON* */
269}
270
271/**
272 * @brif Show/display one tenant
273 */
274static u8 *
Christophe Fontained3c008d2017-10-02 18:10:54 +0200275format_lisp_gpe_tenant (u8 * s, va_list * ap)
Neale Ranns5e575b12016-10-03 09:40:25 +0100276{
Christophe Fontained3c008d2017-10-02 18:10:54 +0200277 const lisp_gpe_tenant_t *lt = va_arg (*ap, lisp_gpe_tenant_t *);
Neale Ranns5e575b12016-10-03 09:40:25 +0100278
279 s = format (s, "VNI:%d ", lt->lt_vni);
280
281 if (lt->lt_table_id != ~0)
282 {
283 s = format (s, "VRF:%d ", lt->lt_table_id);
284 s = format (s, "L3-SW-IF:%d ", lt->lt_l3_sw_if_index);
285 }
286
287 if (lt->lt_bd_id != ~0)
288 {
289 s = format (s, "BD-ID:%d ", lt->lt_bd_id);
290 s = format (s, "L2-SW-IF:%d ", lt->lt_l2_sw_if_index);
291 }
292
293 return (s);
294}
295
296/**
297 * @brief CLI command to show LISP-GPE tenant.
298 */
299static clib_error_t *
300lisp_gpe_tenant_show (vlib_main_t * vm,
301 unformat_input_t * input, vlib_cli_command_t * cmd)
302{
303 lisp_gpe_tenant_t *lt;
304
305 /* *INDENT-OFF* */
306 pool_foreach (lt, lisp_gpe_tenant_pool,
307 ({
308 vlib_cli_output (vm, "%U", format_lisp_gpe_tenant, lt);
309 }));
310 /* *INDENT-ON* */
311
312 return 0;
313}
314
315/* *INDENT-OFF* */
316VLIB_CLI_COMMAND (lisp_gpe_tenant_command) = {
Filip Tehlar82786c42017-02-20 15:20:37 +0100317 .path = "show gpe tenant",
318 .short_help = "show gpe tenant",
Neale Ranns5e575b12016-10-03 09:40:25 +0100319 .function = lisp_gpe_tenant_show,
320};
321/* *INDENT-ON* */
322
323
324/*
325 * fd.io coding-style-patch-verification: ON
326 *
327 * Local Variables:
328 * eval: (c-set-style "gnu")
329 * End:
330 */