Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 1 | /* |
| 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 | */ |
| 21 | static lisp_gpe_tenant_t *lisp_gpe_tenant_pool; |
| 22 | |
| 23 | /** |
| 24 | * The hash table of all tenants: key:{VNI}. |
| 25 | */ |
| 26 | uword *lisp_gpe_tenant_db; |
| 27 | |
| 28 | static lisp_gpe_tenant_t * |
| 29 | lisp_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 | |
| 41 | static lisp_gpe_tenant_t * |
| 42 | lisp_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 | */ |
| 66 | u32 |
| 67 | lisp_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 | */ |
| 84 | static void |
| 85 | lisp_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 | */ |
| 108 | u32 |
| 109 | lisp_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 | */ |
| 135 | void |
| 136 | lisp_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 Ranns | 5899fde | 2016-10-12 13:51:05 +0100 | [diff] [blame] | 145 | return; |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 146 | } |
| 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 | */ |
| 178 | u32 |
| 179 | lisp_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 | */ |
| 211 | void |
| 212 | lisp_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 | */ |
| 248 | const lisp_gpe_tenant_t * |
| 249 | lisp_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 | */ |
| 257 | void |
| 258 | lisp_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 | */ |
| 274 | static u8 * |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame^] | 275 | format_lisp_gpe_tenant (u8 * s, va_list * ap) |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 276 | { |
Christophe Fontaine | d3c008d | 2017-10-02 18:10:54 +0200 | [diff] [blame^] | 277 | const lisp_gpe_tenant_t *lt = va_arg (*ap, lisp_gpe_tenant_t *); |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 278 | |
| 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 | */ |
| 299 | static clib_error_t * |
| 300 | lisp_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* */ |
| 316 | VLIB_CLI_COMMAND (lisp_gpe_tenant_command) = { |
Filip Tehlar | 82786c4 | 2017-02-20 15:20:37 +0100 | [diff] [blame] | 317 | .path = "show gpe tenant", |
| 318 | .short_help = "show gpe tenant", |
Neale Ranns | 5e575b1 | 2016-10-03 09:40:25 +0100 | [diff] [blame] | 319 | .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 | */ |