palacios/src/palacios/vmm_vnet_core.c

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
  11  * Copyright (c) 2009, Yuan Tang <ytang@northwestern.edu>
  12  * Copyright (c) 2009, The V3VEE Project <http://www.v3vee.org>
  13  * All rights reserved.
  14  *
  15  * Author: Lei Xia <lxia@northwestern.edu>
  16  *         Yuan Tang <ytang@northwestern.edu>
  17  *
  18  * This is free software.  You are permitted to use,
  19  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  20  */
  21
  22 #include <palacios/vmm_vnet.h>
  23 #include <palacios/vm_guest_mem.h>
  24 #include <palacios/vmm_lock.h>
  25 #include <palacios/vmm_queue.h>
  26 #include <palacios/vmm_sprintf.h>
  27 #include <palacios/vmm_ethernet.h>
  28
  29 #ifndef CONFIG_DEBUG_VNET
  30 #undef PrintDebug
  31 #define PrintDebug(fmt, args...)
  32 #endif
  33
  34 struct eth_hdr {
  35     uint8_t dst_mac[ETH_ALEN];
  36     uint8_t src_mac[ETH_ALEN];
  37     uint16_t type; /* indicates layer 3 protocol type */
  38 } __attribute__((packed));
  39
  40
  41 struct vnet_dev {
  42     int dev_id;
  43     uint8_t mac_addr[ETH_ALEN];
  44     struct v3_vm_info * vm;
  45     struct v3_vnet_dev_ops dev_ops;
  46     void * private_data;
  47
  48     int active;
  49     vnet_poll_type_t mode;  //vmm_drivern or guest_drivern
  50
  51     struct list_head node;
  52 } __attribute__((packed));
  53
  54
  55 struct vnet_brg_dev {
  56     struct v3_vm_info * vm;
  57     struct v3_vnet_bridge_ops brg_ops;
  58
  59     uint8_t type;
  60     vnet_poll_type_t mode;
  61     int active;
  62     void * private_data;
  63 } __attribute__((packed));
  64
  65
  66
  67 struct vnet_route_info {
  68     struct v3_vnet_route route_def;
  69
  70     struct vnet_dev * dst_dev;
  71     struct vnet_dev * src_dev;
  72
  73     struct list_head node;
  74     struct list_head match_node; // used for route matching
  75 };
  76
  77
  78 struct route_list {
  79     uint8_t hash_buf[VNET_HASH_SIZE];
  80
  81     uint32_t num_routes;
  82     struct vnet_route_info * routes[0];
  83 } __attribute__((packed));
  84
  85
  86 static struct {
  87     struct list_head routes;
  88     struct list_head devs;
  89
  90     int num_routes;
  91     int num_devs;
  92
  93     struct vnet_brg_dev *bridge;
  94
  95     v3_lock_t lock;
  96     struct vnet_stat stats;
  97
  98     struct hashtable * route_cache;
  99 } vnet_state;
 100
 101
 102
 103 #ifdef CONFIG_DEBUG_VNET
 104 static inline void mac_to_string(uint8_t * mac, char * buf) {
 105     snprintf(buf, 100, "%2x:%2x:%2x:%2x:%2x:%2x",
 106              mac[0], mac[1], mac[2],
 107              mac[3], mac[4], mac[5]);
 108 }
 109
 110 static void print_route(struct v3_vnet_route * route){
 111     char str[50];
 112
 113     mac_to_string(route->src_mac, str);
 114     PrintDebug("Src Mac (%s),  src_qual (%d)\n",
 115                str, route->src_mac_qual);
 116     mac_to_string(route->dst_mac, str);
 117     PrintDebug("Dst Mac (%s),  dst_qual (%d)\n",
 118                str, route->dst_mac_qual);
 119     PrintDebug("Src dev id (%d), src type (%d)",
 120                route->src_id,
 121                route->src_type);
 122     PrintDebug("Dst dev id (%d), dst type (%d)\n",
 123                route->dst_id,
 124                route->dst_type);
 125 }
 126
 127 static void dump_routes(){
 128     struct vnet_route_info *route;
 129
 130     int i = 0;
 131     PrintDebug("\n========Dump routes starts ============\n");
 132     list_for_each_entry(route, &(vnet_state.routes), node) {
 133         PrintDebug("\nroute %d:\n", i++);
 134
 135         print_route(&(route->route_def));
 136         if (route->route_def.dst_type == LINK_INTERFACE) {
 137             PrintDebug("dst_dev (%p), dst_dev_id (%d), dst_dev_ops(%p), dst_dev_data (%p)\n",
 138                 route->dst_dev,
 139                 route->dst_dev->dev_id,
 140                 (void *)&(route->dst_dev->dev_ops),
 141                 route->dst_dev->private_data);
 142         }
 143     }
 144
 145     PrintDebug("\n========Dump routes end ============\n");
 146 }
 147
 148 #endif
 149
 150
 151 /*
 152  * A VNET packet is a packed struct with the hashed fields grouped together.
 153  * This means we can generate the hash from an offset into the pkt struct
 154  */
 155 static inline uint_t hash_fn(addr_t hdr_ptr) {
 156     uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
 157
 158     return v3_hash_buffer(hdr_buf, VNET_HASH_SIZE);
 159 }
 160
 161 static inline int hash_eq(addr_t key1, addr_t key2) {
 162     return (memcmp((uint8_t *)key1, (uint8_t *)key2, VNET_HASH_SIZE) == 0);
 163 }
 164
 165 static int add_route_to_cache(const struct v3_vnet_pkt * pkt, struct route_list * routes) {
 166     memcpy(routes->hash_buf, pkt->hash_buf, VNET_HASH_SIZE);
 167
 168     if (v3_htable_insert(vnet_state.route_cache, (addr_t)routes->hash_buf, (addr_t)routes) == 0) {
 169         PrintError("VNET/P Core: Failed to insert new route entry to the cache\n");
 170         return -1;
 171     }
 172
 173     return 0;
 174 }
 175
 176 static int clear_hash_cache() {
 177     v3_free_htable(vnet_state.route_cache, 1, 1);
 178     vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
 179
 180     return 0;
 181 }
 182
 183 static int look_into_cache(const struct v3_vnet_pkt * pkt, struct route_list ** routes) {
 184     *routes = (struct route_list *)v3_htable_search(vnet_state.route_cache, (addr_t)(pkt->hash_buf));
 185
 186     return 0;
 187 }
 188
 189
 190 static struct vnet_dev * dev_by_id(int idx) {
 191     struct vnet_dev * dev = NULL;
 192
 193     list_for_each_entry(dev, &(vnet_state.devs), node) {
 194         int dev_id = dev->dev_id;
 195
 196         if (dev_id == idx)
 197             return dev;
 198     }
 199
 200     return NULL;
 201 }
 202
 203 static struct vnet_dev * dev_by_mac(uint8_t * mac) {
 204     struct vnet_dev * dev = NULL;
 205
 206     list_for_each_entry(dev, &(vnet_state.devs), node) {
 207         if (!compare_ethaddr(dev->mac_addr, mac)){
 208             return dev;
 209         }
 210     }
 211
 212     return NULL;
 213 }
 214
 215
 216 int v3_vnet_find_dev(uint8_t  * mac) {
 217     struct vnet_dev * dev = NULL;
 218
 219     dev = dev_by_mac(mac);
 220
 221     if(dev != NULL) {
 222         return dev->dev_id;
 223     }
 224
 225     return -1;
 226 }
 227
 228
 229 int v3_vnet_add_route(struct v3_vnet_route route) {
 230     struct vnet_route_info * new_route = NULL;
 231     unsigned long flags;
 232
 233     new_route = (struct vnet_route_info *)V3_Malloc(sizeof(struct vnet_route_info));
 234     memset(new_route, 0, sizeof(struct vnet_route_info));
 235
 236 #ifdef CONFIG_DEBUG_VNET
 237     PrintDebug("VNET/P Core: add_route_entry:\n");
 238     print_route(&route);
 239 #endif
 240
 241     memcpy(new_route->route_def.src_mac, route.src_mac, ETH_ALEN);
 242     memcpy(new_route->route_def.dst_mac, route.dst_mac, ETH_ALEN);
 243     new_route->route_def.src_mac_qual = route.src_mac_qual;
 244     new_route->route_def.dst_mac_qual = route.dst_mac_qual;
 245     new_route->route_def.dst_type = route.dst_type;
 246     new_route->route_def.src_type = route.src_type;
 247     new_route->route_def.src_id = route.src_id;
 248     new_route->route_def.dst_id = route.dst_id;
 249
 250     if (new_route->route_def.dst_type == LINK_INTERFACE) {
 251         new_route->dst_dev = dev_by_id(new_route->route_def.dst_id);
 252     }
 253
 254     if (new_route->route_def.src_type == LINK_INTERFACE) {
 255         new_route->src_dev = dev_by_id(new_route->route_def.src_id);
 256     }
 257
 258
 259     flags = v3_lock_irqsave(vnet_state.lock);
 260
 261     list_add(&(new_route->node), &(vnet_state.routes));
 262     clear_hash_cache();
 263
 264     v3_unlock_irqrestore(vnet_state.lock, flags);
 265
 266
 267 #ifdef CONFIG_DEBUG_VNET
 268     dump_routes();
 269 #endif
 270
 271     return 0;
 272 }
 273
 274
 275 /* delete all route entries with specfied src or dst device id */
 276 static void inline del_routes_by_dev(int dev_id){
 277     struct vnet_route_info * route = NULL;
 278     unsigned long flags;
 279
 280     flags = v3_lock_irqsave(vnet_state.lock);
 281
 282     list_for_each_entry(route, &(vnet_state.routes), node) {
 283         if((route->route_def.dst_type == LINK_INTERFACE &&
 284              route->route_def.dst_id == dev_id) ||
 285              (route->route_def.src_type == LINK_INTERFACE &&
 286               route->route_def.src_id == dev_id)){
 287
 288             list_del(&(route->node));
 289             list_del(&(route->match_node));
 290             V3_Free(route);
 291         }
 292     }
 293
 294     v3_unlock_irqrestore(vnet_state.lock, flags);
 295 }
 296
 297 /* At the end allocate a route_list
 298  * This list will be inserted into the cache so we don't need to free it
 299  */
 300 static struct route_list * match_route(const struct v3_vnet_pkt * pkt) {
 301     struct vnet_route_info * route = NULL;
 302     struct route_list * matches = NULL;
 303     int num_matches = 0;
 304     int max_rank = 0;
 305     struct list_head match_list;
 306     struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data);
 307  //   uint8_t src_type = pkt->src_type;
 308  //   uint32_t src_link = pkt->src_id;
 309
 310 #ifdef CONFIG_DEBUG_VNET
 311     {
 312         char dst_str[100];
 313         char src_str[100];
 314
 315         mac_to_string(hdr->src_mac, src_str);
 316         mac_to_string(hdr->dst_mac, dst_str);
 317         PrintDebug("VNET/P Core: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dst_str);
 318     }
 319 #endif
 320
 321     INIT_LIST_HEAD(&match_list);
 322
 323 #define UPDATE_MATCHES(rank) do {                               \
 324         if (max_rank < (rank)) {                                \
 325             max_rank = (rank);                                  \
 326             INIT_LIST_HEAD(&match_list);                        \
 327                                                                 \
 328             list_add(&(route->match_node), &match_list);        \
 329             num_matches = 1;                                    \
 330         } else if (max_rank == (rank)) {                        \
 331             list_add(&(route->match_node), &match_list);        \
 332             num_matches++;                                      \
 333         }                                                       \
 334     } while (0)
 335
 336
 337     list_for_each_entry(route, &(vnet_state.routes), node) {
 338         struct v3_vnet_route * route_def = &(route->route_def);
 339
 340 /*
 341         // CHECK SOURCE TYPE HERE
 342         if ( (route_def->src_type != LINK_ANY) &&
 343              ( (route_def->src_type != src_type) ||
 344                ( (route_def->src_id != src_link) &&
 345                  (route_def->src_id != -1)))) {
 346             continue;
 347         }
 348 */
 349
 350         if ((route_def->dst_mac_qual == MAC_ANY) &&
 351             (route_def->src_mac_qual == MAC_ANY)) {
 352             UPDATE_MATCHES(3);
 353         }
 354
 355         if (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) {
 356             if (route_def->src_mac_qual != MAC_NOT) {
 357                 if (route_def->dst_mac_qual == MAC_ANY) {
 358                     UPDATE_MATCHES(6);
 359                 } else if (route_def->dst_mac_qual != MAC_NOT &&
 360                            memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
 361                     UPDATE_MATCHES(8);
 362                 }
 363             }
 364         }
 365
 366         if (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
 367             if (route_def->dst_mac_qual != MAC_NOT) {
 368                 if (route_def->src_mac_qual == MAC_ANY) {
 369                     UPDATE_MATCHES(6);
 370                 } else if ((route_def->src_mac_qual != MAC_NOT) &&
 371                            (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
 372                     UPDATE_MATCHES(8);
 373                 }
 374             }
 375         }
 376
 377         if ((route_def->dst_mac_qual == MAC_NOT) &&
 378             (memcmp(route_def->dst_mac, hdr->dst_mac, 6) != 0)) {
 379             if (route_def->src_mac_qual == MAC_ANY) {
 380                 UPDATE_MATCHES(5);
 381             } else if ((route_def->src_mac_qual != MAC_NOT) &&
 382                        (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
 383                 UPDATE_MATCHES(7);
 384             }
 385         }
 386
 387         if ((route_def->src_mac_qual == MAC_NOT) &&
 388             (memcmp(route_def->src_mac, hdr->src_mac, 6) != 0)) {
 389             if (route_def->dst_mac_qual == MAC_ANY) {
 390                 UPDATE_MATCHES(5);
 391             } else if ((route_def->dst_mac_qual != MAC_NOT) &&
 392                        (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0)) {
 393                 UPDATE_MATCHES(7);
 394             }
 395         }
 396
 397         // Default route
 398         if ( (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) &&
 399              (route_def->dst_mac_qual == MAC_NONE)) {
 400             UPDATE_MATCHES(4);
 401         }
 402     }
 403
 404     PrintDebug("VNET/P Core: match_route: Matches=%d\n", num_matches);
 405
 406     if (num_matches == 0) {
 407         return NULL;
 408     }
 409
 410     matches = (struct route_list *)V3_Malloc(sizeof(struct route_list) +
 411                                 (sizeof(struct vnet_route_info *) * num_matches));
 412
 413     matches->num_routes = num_matches;
 414
 415     {
 416         int i = 0;
 417         list_for_each_entry(route, &match_list, match_node) {
 418             matches->routes[i++] = route;
 419         }
 420     }
 421
 422     return matches;
 423 }
 424
 425
 426 int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
 427     struct route_list * matched_routes = NULL;
 428     unsigned long flags;
 429     int i;
 430
 431 #ifdef CONFIG_DEBUG_VNET
 432    {
 433         int cpu = V3_Get_CPU();
 434        PrintDebug("VNET/P Core: cpu %d: pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
 435                   cpu, pkt->size, pkt->src_id,
 436                   pkt->src_type, pkt->dst_id, pkt->dst_type);
 437        //v3_hexdump(pkt->data, pkt->size, NULL, 0);
 438    }
 439 #endif
 440
 441     flags = v3_lock_irqsave(vnet_state.lock);
 442
 443     vnet_state.stats.rx_bytes += pkt->size;
 444     vnet_state.stats.rx_pkts++;
 445
 446     look_into_cache(pkt, &matched_routes);
 447     if (matched_routes == NULL) {
 448         PrintDebug("VNET/P Core: send pkt Looking into routing table\n");
 449
 450         matched_routes = match_route(pkt);
 451
 452         if (matched_routes) {
 453             add_route_to_cache(pkt, matched_routes);
 454         } else {
 455             PrintDebug("VNET/P Core: Could not find route for packet... discards packet\n");
 456             v3_unlock_irqrestore(vnet_state.lock, flags);
 457             return 0; /* do we return -1 here?*/
 458         }
 459     }
 460
 461     v3_unlock_irqrestore(vnet_state.lock, flags);
 462
 463     PrintDebug("VNET/P Core: send pkt route matches %d\n", matched_routes->num_routes);
 464
 465     for (i = 0; i < matched_routes->num_routes; i++) {
 466         struct vnet_route_info * route = matched_routes->routes[i];
 467
 468         if (route->route_def.dst_type == LINK_EDGE) {
 469             struct vnet_brg_dev *bridge = vnet_state.bridge;
 470             pkt->dst_type = LINK_EDGE;
 471             pkt->dst_id = route->route_def.dst_id;
 472
 473             if (bridge == NULL || (bridge->active == 0)) {
 474                 PrintDebug("VNET/P Core: No active bridge to sent data to\n");
 475                  continue;
 476             }
 477
 478             if(bridge->brg_ops.input(bridge->vm, pkt, bridge->private_data) < 0){
 479                 PrintDebug("VNET/P Core: Packet not sent properly to bridge\n");
 480                 continue;
 481             }
 482             vnet_state.stats.tx_bytes += pkt->size;
 483             vnet_state.stats.tx_pkts ++;
 484         } else if (route->route_def.dst_type == LINK_INTERFACE) {
 485             if (route->dst_dev == NULL || route->dst_dev->active == 0){
 486                 PrintDebug("VNET/P Core: No active device to sent data to\n");
 487                 continue;
 488             }
 489
 490             if(route->dst_dev->dev_ops.input(route->dst_dev->vm, pkt, route->dst_dev->private_data) < 0) {
 491                 PrintDebug("VNET/P Core: Packet not sent properly\n");
 492                 continue;
 493             }
 494             vnet_state.stats.tx_bytes += pkt->size;
 495             vnet_state.stats.tx_pkts ++;
 496         } else {
 497             PrintError("VNET/P Core: Wrong dst type\n");
 498         }
 499     }
 500
 501     return 0;
 502 }
 503
 504 int v3_vnet_add_dev(struct v3_vm_info * vm, uint8_t * mac,
 505                     struct v3_vnet_dev_ops *ops,
 506                     void * priv_data){
 507     struct vnet_dev * new_dev = NULL;
 508     unsigned long flags;
 509
 510     new_dev = (struct vnet_dev *)V3_Malloc(sizeof(struct vnet_dev));
 511
 512     if (new_dev == NULL) {
 513         PrintError("Malloc fails\n");
 514         return -1;
 515     }
 516
 517     memcpy(new_dev->mac_addr, mac, 6);
 518     new_dev->dev_ops.input = ops->input;
 519     new_dev->dev_ops.poll = ops->poll;
 520     new_dev->private_data = priv_data;
 521     new_dev->vm = vm;
 522     new_dev->dev_id = 0;
 523     new_dev->active = 1;
 524     new_dev->mode = GUEST_DRIVERN;
 525
 526     flags = v3_lock_irqsave(vnet_state.lock);
 527
 528     if (dev_by_mac(mac) == NULL) {
 529         list_add(&(new_dev->node), &(vnet_state.devs));
 530         new_dev->dev_id = ++vnet_state.num_devs;
 531     }
 532
 533     v3_unlock_irqrestore(vnet_state.lock, flags);
 534
 535     /* if the device was found previosly the id should still be 0 */
 536     if (new_dev->dev_id == 0) {
 537         PrintError("VNET/P Core: Device Already exists\n");
 538         return -1;
 539     }
 540
 541     PrintDebug("VNET/P Core: Add Device: dev_id %d\n", new_dev->dev_id);
 542
 543     return new_dev->dev_id;
 544 }
 545
 546
 547
 548 int v3_vnet_del_dev(int dev_id){
 549     struct vnet_dev * dev = NULL;
 550     unsigned long flags;
 551
 552     flags = v3_lock_irqsave(vnet_state.lock);
 553
 554     dev = dev_by_id(dev_id);
 555     if (dev != NULL){
 556         list_del(&(dev->node));
 557         del_routes_by_dev(dev_id);
 558     }
 559
 560     v3_unlock_irqrestore(vnet_state.lock, flags);
 561
 562     V3_Free(dev);
 563
 564     PrintDebug("VNET/P Core: Remove Device: dev_id %d\n", dev_id);
 565
 566     return 0;
 567 }
 568
 569 int v3_vnet_stat(struct vnet_stat * stats){
 570
 571     stats->rx_bytes = vnet_state.stats.rx_bytes;
 572     stats->rx_pkts = vnet_state.stats.rx_pkts;
 573     stats->tx_bytes = vnet_state.stats.tx_bytes;
 574     stats->tx_pkts = vnet_state.stats.tx_pkts;
 575
 576     return 0;
 577 }
 578
 579 static void free_devices(){
 580     struct vnet_dev * dev = NULL;
 581
 582     list_for_each_entry(dev, &(vnet_state.devs), node) {
 583         list_del(&(dev->node));
 584         V3_Free(dev);
 585     }
 586 }
 587
 588 static void free_routes(){
 589     struct vnet_route_info * route = NULL;
 590
 591     list_for_each_entry(route, &(vnet_state.routes), node) {
 592         list_del(&(route->node));
 593         list_del(&(route->match_node));
 594         V3_Free(route);
 595     }
 596 }
 597
 598 int v3_vnet_add_bridge(struct v3_vm_info * vm,
 599                        struct v3_vnet_bridge_ops * ops,
 600                        uint8_t type,
 601                        void * priv_data) {
 602     unsigned long flags;
 603     int bridge_free = 0;
 604     struct vnet_brg_dev * tmp_bridge = NULL;
 605
 606     flags = v3_lock_irqsave(vnet_state.lock);
 607
 608     if (vnet_state.bridge == NULL) {
 609         bridge_free = 1;
 610         vnet_state.bridge = (void *)1;
 611     }
 612
 613     v3_unlock_irqrestore(vnet_state.lock, flags);
 614
 615     if (bridge_free == 0) {
 616         PrintError("VNET/P Core: Bridge already set\n");
 617         return -1;
 618     }
 619
 620     tmp_bridge = (struct vnet_brg_dev *)V3_Malloc(sizeof(struct vnet_brg_dev));
 621
 622     if (tmp_bridge == NULL) {
 623         PrintError("Malloc Fails\n");
 624         vnet_state.bridge = NULL;
 625         return -1;
 626     }
 627
 628     tmp_bridge->vm = vm;
 629     tmp_bridge->brg_ops.input = ops->input;
 630     tmp_bridge->brg_ops.poll = ops->poll;
 631     tmp_bridge->private_data = priv_data;
 632     tmp_bridge->active = 1;
 633     tmp_bridge->mode = GUEST_DRIVERN;
 634     tmp_bridge->type = type;
 635
 636     /* make this atomic to avoid possible race conditions */
 637     flags = v3_lock_irqsave(vnet_state.lock);
 638     vnet_state.bridge = tmp_bridge;
 639     v3_unlock_irqrestore(vnet_state.lock, flags);
 640
 641     return 0;
 642 }
 643
 644
 645 int v3_init_vnet() {
 646     memset(&vnet_state, 0, sizeof(vnet_state));
 647
 648     INIT_LIST_HEAD(&(vnet_state.routes));
 649     INIT_LIST_HEAD(&(vnet_state.devs));
 650
 651     vnet_state.num_devs = 0;
 652     vnet_state.num_routes = 0;
 653
 654     if (v3_lock_init(&(vnet_state.lock)) == -1){
 655         PrintError("VNET/P Core: Fails to initiate lock\n");
 656     }
 657
 658     vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
 659
 660     if (vnet_state.route_cache == NULL) {
 661         PrintError("VNET/P Core: Fails to initiate route cache\n");
 662         return -1;
 663     }
 664
 665     PrintDebug("VNET/P Core is initiated\n");
 666
 667     return 0;
 668 }
 669
 670
 671 void v3_deinit_vnet(){
 672
 673     v3_lock_deinit(&(vnet_state.lock));
 674
 675     free_devices();
 676     free_routes();
 677
 678     v3_free_htable(vnet_state.route_cache, 1, 1);
 679     V3_Free(vnet_state.bridge);
 680 }
 681
 682