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     uint8_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     uint8_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
  97     struct hashtable * route_cache;
  98 } vnet_state;
  99
 100
 101
 102 #ifdef CONFIG_DEBUG_VNET
 103 static inline void mac_to_string(uint8_t * mac, char * buf) {
 104     snprintf(buf, 100, "%d:%d:%d:%d:%d:%d",
 105              mac[0], mac[1], mac[2],
 106              mac[3], mac[4], mac[5]);
 107 }
 108
 109 static void print_route(struct vnet_route_info * route){
 110     char str[50];
 111
 112     mac_to_string(route->route_def.src_mac, str);
 113     PrintDebug("Src Mac (%s),  src_qual (%d)\n",
 114                str, route->route_def.src_mac_qual);
 115     mac_to_string(route->route_def.dst_mac, str);
 116     PrintDebug("Dst Mac (%s),  dst_qual (%d)\n",
 117                str, route->route_def.dst_mac_qual);
 118     PrintDebug("Src dev id (%d), src type (%d)",
 119                route->route_def.src_id,
 120                route->route_def.src_type);
 121     PrintDebug("Dst dev id (%d), dst type (%d)\n",
 122                route->route_def.dst_id,
 123                route->route_def.dst_type);
 124     if (route->route_def.dst_type == LINK_INTERFACE) {
 125         PrintDebug("dst_dev (%p), dst_dev_id (%d), dst_dev_ops(%p), dst_dev_data (%p)\n",
 126                route->dst_dev,
 127                route->dst_dev->dev_id,
 128                (void *)&(route->dst_dev->dev_ops),
 129                route->dst_dev->private_data);
 130     }
 131 }
 132
 133 static void dump_routes(){
 134         struct vnet_route_info *route;
 135
 136         int i = 0;
 137         PrintDebug("\n========Dump routes starts ============\n");
 138         list_for_each_entry(route, &(vnet_state.routes), node) {
 139             PrintDebug("\nroute %d:\n", i++);
 140
 141             print_route(route);
 142         }
 143         PrintDebug("\n========Dump routes end ============\n");
 144 }
 145
 146 #endif
 147
 148
 149 /*
 150  * A VNET packet is a packed struct with the hashed fields grouped together.
 151  * This means we can generate the hash from an offset into the pkt struct
 152  */
 153 static inline uint_t hash_fn(addr_t hdr_ptr) {
 154     uint8_t * hdr_buf = (uint8_t *)hdr_ptr;
 155
 156     return v3_hash_buffer(hdr_buf, VNET_HASH_SIZE);
 157 }
 158
 159 static inline int hash_eq(addr_t key1, addr_t key2) {
 160     return (memcmp((uint8_t *)key1, (uint8_t *)key2, VNET_HASH_SIZE) == 0);
 161 }
 162
 163 static int add_route_to_cache(const struct v3_vnet_pkt * pkt, struct route_list * routes) {
 164     memcpy(routes->hash_buf, pkt->hash_buf, VNET_HASH_SIZE);
 165
 166     if (v3_htable_insert(vnet_state.route_cache, (addr_t)routes->hash_buf, (addr_t)routes) == 0) {
 167         PrintError("VNET/P Core: Failed to insert new route entry to the cache\n");
 168         return -1;
 169     }
 170
 171     return 0;
 172 }
 173
 174 static int clear_hash_cache() {
 175     v3_free_htable(vnet_state.route_cache, 1, 1);
 176     vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
 177
 178     return 0;
 179 }
 180
 181 static int look_into_cache(const struct v3_vnet_pkt * pkt, struct route_list ** routes) {
 182     *routes = (struct route_list *)v3_htable_search(vnet_state.route_cache, (addr_t)(pkt->hash_buf));
 183
 184     return 0;
 185 }
 186
 187
 188 static struct vnet_dev * dev_by_id(int idx) {
 189     struct vnet_dev * dev = NULL;
 190
 191     list_for_each_entry(dev, &(vnet_state.devs), node) {
 192         int dev_id = dev->dev_id;
 193
 194         if (dev_id == idx)
 195             return dev;
 196     }
 197
 198     return NULL;
 199 }
 200
 201 static struct vnet_dev * dev_by_mac(uint8_t * mac) {
 202     struct vnet_dev * dev = NULL;
 203
 204     list_for_each_entry(dev, &(vnet_state.devs), node) {
 205         if (!memcmp(dev->mac_addr, mac, ETH_ALEN))
 206             return dev;
 207     }
 208
 209     return NULL;
 210 }
 211
 212
 213 int v3_vnet_add_route(struct v3_vnet_route route) {
 214     struct vnet_route_info * new_route = NULL;
 215     unsigned long flags;
 216
 217     new_route = (struct vnet_route_info *)V3_Malloc(sizeof(struct vnet_route_info));
 218     memset(new_route, 0, sizeof(struct vnet_route_info));
 219
 220     PrintDebug("VNET/P Core: add_route_entry: dst_id: %d, dst_type: %d\n",
 221                route.dst_id, route.dst_type);
 222
 223     memcpy(new_route->route_def.src_mac, route.src_mac, ETH_ALEN);
 224     memcpy(new_route->route_def.dst_mac, route.dst_mac, ETH_ALEN);
 225     new_route->route_def.src_mac_qual = route.src_mac_qual;
 226     new_route->route_def.dst_mac_qual = route.dst_mac_qual;
 227     new_route->route_def.dst_type = route.dst_type;
 228     new_route->route_def.src_type = route.src_type;
 229
 230     if(route.dst_id == -1){
 231         if (new_route->route_def.dst_type == LINK_INTERFACE) {
 232             new_route->dst_dev = dev_by_mac(route.dst_mac);
 233         }
 234         new_route->route_def.dst_id = new_route->dst_dev->dev_id;
 235     } else {
 236         new_route->route_def.dst_id = route.dst_id;
 237         if (new_route->route_def.dst_type == LINK_INTERFACE) {
 238             new_route->dst_dev = dev_by_id(new_route->route_def.dst_id);
 239         }
 240     }
 241
 242     if(route.src_id == -1){
 243         if (new_route->route_def.src_type == LINK_INTERFACE) {
 244             new_route->src_dev = dev_by_mac(route.src_mac);
 245         }
 246         new_route->route_def.src_id = new_route->src_dev->dev_id;
 247     } else {
 248         new_route->route_def.src_id = route.src_id;
 249         if (new_route->route_def.src_type == LINK_INTERFACE) {
 250             new_route->src_dev = dev_by_id(new_route->route_def.src_id);
 251         }
 252     }
 253
 254     flags = v3_lock_irqsave(vnet_state.lock);
 255
 256     list_add(&(new_route->node), &(vnet_state.routes));
 257     clear_hash_cache();
 258
 259     v3_unlock_irqrestore(vnet_state.lock, flags);
 260
 261
 262 #ifdef CONFIG_DEBUG_VNET
 263     dump_routes();
 264 #endif
 265
 266     return 0;
 267 }
 268
 269
 270 /* delete all route entries with specfied src or dst device id */
 271 static void inline del_routes_by_dev(int dev_id){
 272     struct vnet_route_info * route = NULL;
 273     unsigned long flags;
 274
 275     flags = v3_lock_irqsave(vnet_state.lock);
 276
 277     list_for_each_entry(route, &(vnet_state.routes), node) {
 278         if((route->route_def.dst_type == LINK_INTERFACE &&
 279              route->route_def.dst_id == dev_id) ||
 280              (route->route_def.src_type == LINK_INTERFACE &&
 281               route->route_def.src_id == dev_id)){
 282
 283             list_del(&(route->node));
 284             list_del(&(route->match_node));
 285             V3_Free(route);
 286         }
 287     }
 288
 289     v3_unlock_irqrestore(vnet_state.lock, flags);
 290 }
 291
 292 /* At the end allocate a route_list
 293  * This list will be inserted into the cache so we don't need to free it
 294  */
 295 static struct route_list * match_route(const struct v3_vnet_pkt * pkt) {
 296     struct vnet_route_info * route = NULL;
 297     struct route_list * matches = NULL;
 298     int num_matches = 0;
 299     int max_rank = 0;
 300     struct list_head match_list;
 301     struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data);
 302     uint8_t src_type = pkt->src_type;
 303     uint32_t src_link = pkt->src_id;
 304
 305 #ifdef CONFIG_DEBUG_VNET
 306     {
 307         char dst_str[100];
 308         char src_str[100];
 309
 310         mac_to_string(hdr->src_mac, src_str);
 311         mac_to_string(hdr->dst_mac, dst_str);
 312         PrintDebug("VNET/P Core: match_route. pkt: SRC(%s), DEST(%s)\n", src_str, dst_str);
 313     }
 314 #endif
 315
 316     INIT_LIST_HEAD(&match_list);
 317
 318 #define UPDATE_MATCHES(rank) do {                               \
 319         if (max_rank < (rank)) {                                \
 320             max_rank = (rank);                                  \
 321             INIT_LIST_HEAD(&match_list);                        \
 322                                                                 \
 323             list_add(&(route->match_node), &match_list);        \
 324             num_matches = 1;                                    \
 325         } else if (max_rank == (rank)) {                        \
 326             list_add(&(route->match_node), &match_list);        \
 327             num_matches++;                                      \
 328         }                                                       \
 329     } while (0)
 330
 331
 332     list_for_each_entry(route, &(vnet_state.routes), node) {
 333         struct v3_vnet_route * route_def = &(route->route_def);
 334
 335         // CHECK SOURCE TYPE HERE
 336         if ( (route_def->src_type != LINK_ANY) &&
 337              ( (route_def->src_type != src_type) ||
 338                ( (route_def->src_id != src_link) &&
 339                  (route_def->src_id != (uint32_t)-1)))) {
 340             continue;
 341         }
 342
 343
 344         if ((route_def->dst_mac_qual == MAC_ANY) &&
 345             (route_def->src_mac_qual == MAC_ANY)) {
 346             UPDATE_MATCHES(3);
 347         }
 348
 349         if (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) {
 350             if (route_def->src_mac_qual != MAC_NOT) {
 351                 if (route_def->dst_mac_qual == MAC_ANY) {
 352                     UPDATE_MATCHES(6);
 353                 } else if (route_def->dst_mac_qual != MAC_NOT &&
 354                            memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
 355                     UPDATE_MATCHES(8);
 356                 }
 357             }
 358         }
 359
 360         if (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0) {
 361             if (route_def->dst_mac_qual != MAC_NOT) {
 362                 if (route_def->src_mac_qual == MAC_ANY) {
 363                     UPDATE_MATCHES(6);
 364                 } else if ((route_def->src_mac_qual != MAC_NOT) &&
 365                            (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
 366                     UPDATE_MATCHES(8);
 367                 }
 368             }
 369         }
 370
 371         if ((route_def->dst_mac_qual == MAC_NOT) &&
 372             (memcmp(route_def->dst_mac, hdr->dst_mac, 6) != 0)) {
 373             if (route_def->src_mac_qual == MAC_ANY) {
 374                 UPDATE_MATCHES(5);
 375             } else if ((route_def->src_mac_qual != MAC_NOT) &&
 376                        (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0)) {
 377                 UPDATE_MATCHES(7);
 378             }
 379         }
 380
 381         if ((route_def->src_mac_qual == MAC_NOT) &&
 382             (memcmp(route_def->src_mac, hdr->src_mac, 6) != 0)) {
 383             if (route_def->dst_mac_qual == MAC_ANY) {
 384                 UPDATE_MATCHES(5);
 385             } else if ((route_def->dst_mac_qual != MAC_NOT) &&
 386                        (memcmp(route_def->dst_mac, hdr->dst_mac, 6) == 0)) {
 387                 UPDATE_MATCHES(7);
 388             }
 389         }
 390
 391         // Default route
 392         if ( (memcmp(route_def->src_mac, hdr->src_mac, 6) == 0) &&
 393              (route_def->dst_mac_qual == MAC_NONE)) {
 394             UPDATE_MATCHES(4);
 395         }
 396     }
 397
 398     PrintDebug("VNET/P Core: match_route: Matches=%d\n", num_matches);
 399
 400     if (num_matches == 0) {
 401         return NULL;
 402     }
 403
 404     matches = (struct route_list *)V3_Malloc(sizeof(struct route_list) +
 405                                 (sizeof(struct vnet_route_info *) * num_matches));
 406
 407     matches->num_routes = num_matches;
 408
 409     {
 410         int i = 0;
 411         list_for_each_entry(route, &match_list, match_node) {
 412             matches->routes[i++] = route;
 413         }
 414     }
 415
 416     return matches;
 417 }
 418
 419
 420 int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
 421     struct route_list * matched_routes = NULL;
 422     unsigned long flags;
 423     int i;
 424
 425 #ifdef CONFIG_DEBUG_VNET
 426    {
 427         int cpu = V3_Get_CPU();
 428        PrintDebug("VNET/P Core: cpu %d: pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
 429                   cpu, pkt->size, pkt->src_id,
 430                   pkt->src_type, pkt->dst_id, pkt->dst_type);
 431        //v3_hexdump(pkt->data, pkt->size, NULL, 0);
 432    }
 433 #endif
 434
 435     flags = v3_lock_irqsave(vnet_state.lock);
 436
 437     look_into_cache(pkt, &matched_routes);
 438     if (matched_routes == NULL) {
 439         PrintDebug("VNET/P Core: send pkt Looking into routing table\n");
 440
 441         matched_routes = match_route(pkt);
 442
 443         if (matched_routes) {
 444             add_route_to_cache(pkt, matched_routes);
 445         } else {
 446             PrintDebug("VNET/P Core: Could not find route for packet... discards packet\n");
 447             v3_unlock_irqrestore(vnet_state.lock, flags);
 448             return 0; /* do we return -1 here?*/
 449         }
 450     }
 451
 452     v3_unlock_irqrestore(vnet_state.lock, flags);
 453
 454     PrintDebug("VNET/P Core: send pkt route matches %d\n", matched_routes->num_routes);
 455
 456     for (i = 0; i < matched_routes->num_routes; i++) {
 457         struct vnet_route_info * route = matched_routes->routes[i];
 458
 459         if (route->route_def.dst_type == LINK_EDGE) {
 460             struct vnet_brg_dev *bridge = vnet_state.bridge;
 461             pkt->dst_type = LINK_EDGE;
 462             pkt->dst_id = route->route_def.dst_id;
 463
 464             if (bridge == NULL || (bridge->active == 0)) {
 465                 PrintDebug("VNET/P Core: No active bridge to sent data to\n");
 466                  continue;
 467             }
 468
 469             if(bridge->brg_ops.input(bridge->vm, pkt, bridge->private_data) < 0){
 470                 PrintDebug("VNET/P Core: Packet not sent properly to bridge\n");
 471                 continue;
 472             }
 473         } else if (route->route_def.dst_type == LINK_INTERFACE) {
 474             if (route->dst_dev == NULL || route->dst_dev->active == 0){
 475                 PrintDebug("VNET/P Core: No active device to sent data to\n");
 476                 continue;
 477             }
 478
 479             if(route->dst_dev->dev_ops.input(route->dst_dev->vm, pkt, route->dst_dev->private_data) < 0) {
 480                 PrintDebug("VNET/P Core: Packet not sent properly\n");
 481                 continue;
 482             }
 483         } else {
 484             PrintError("VNET/P Core: Wrong dst type\n");
 485         }
 486     }
 487
 488     return 0;
 489 }
 490
 491 int v3_vnet_add_dev(struct v3_vm_info * vm, uint8_t * mac,
 492                     struct v3_vnet_dev_ops *ops,
 493                     void * priv_data){
 494     struct vnet_dev * new_dev = NULL;
 495     unsigned long flags;
 496
 497     new_dev = (struct vnet_dev *)V3_Malloc(sizeof(struct vnet_dev));
 498
 499     if (new_dev == NULL) {
 500         PrintError("Malloc fails\n");
 501         return -1;
 502     }
 503
 504     memcpy(new_dev->mac_addr, mac, 6);
 505     new_dev->dev_ops.input = ops->input;
 506     new_dev->dev_ops.poll = ops->poll;
 507     new_dev->private_data = priv_data;
 508     new_dev->vm = vm;
 509     new_dev->dev_id = 0;
 510     new_dev->active = 1;
 511     new_dev->mode = GUEST_DRIVERN;
 512
 513     flags = v3_lock_irqsave(vnet_state.lock);
 514
 515     if (dev_by_mac(mac) == NULL) {
 516         list_add(&(new_dev->node), &(vnet_state.devs));
 517         new_dev->dev_id = ++vnet_state.num_devs;
 518     }
 519
 520     v3_unlock_irqrestore(vnet_state.lock, flags);
 521
 522     /* if the device was found previosly the id should still be 0 */
 523     if (new_dev->dev_id == 0) {
 524         PrintError("VNET/P Core: Device Already exists\n");
 525         return -1;
 526     }
 527
 528     PrintDebug("VNET/P Core: Add Device: dev_id %d\n", new_dev->dev_id);
 529
 530     return new_dev->dev_id;
 531 }
 532
 533
 534
 535 int v3_vnet_del_dev(int dev_id){
 536     struct vnet_dev * dev = NULL;
 537     unsigned long flags;
 538
 539     flags = v3_lock_irqsave(vnet_state.lock);
 540
 541     dev = dev_by_id(dev_id);
 542     if (dev != NULL){
 543         list_del(&(dev->node));
 544         del_routes_by_dev(dev_id);
 545     }
 546
 547     v3_unlock_irqrestore(vnet_state.lock, flags);
 548
 549     V3_Free(dev);
 550
 551     PrintDebug("VNET/P Core: Remove Device: dev_id %d\n", dev_id);
 552
 553     return 0;
 554 }
 555
 556
 557 static void free_devices(){
 558     struct vnet_dev * dev = NULL;
 559
 560     list_for_each_entry(dev, &(vnet_state.devs), node) {
 561         list_del(&(dev->node));
 562         V3_Free(dev);
 563     }
 564 }
 565
 566 static void free_routes(){
 567     struct vnet_route_info * route = NULL;
 568
 569     list_for_each_entry(route, &(vnet_state.routes), node) {
 570         list_del(&(route->node));
 571         list_del(&(route->match_node));
 572         V3_Free(route);
 573     }
 574 }
 575
 576 /* TODO: Round-bin or ?? */
 577 void  v3_vnet_poll(struct v3_vm_info * vm){
 578     struct vnet_dev * dev = NULL;
 579     struct vnet_brg_dev *bridge = vnet_state.bridge;
 580
 581     list_for_each_entry(dev, &(vnet_state.devs), node) {
 582         if(dev->mode == VMM_DRIVERN &&
 583             dev->active &&
 584             dev->vm == vm){
 585
 586             dev->dev_ops.poll(vm, dev->private_data);
 587         }
 588     }
 589
 590     if (bridge != NULL &&
 591           bridge->active &&
 592           bridge->mode == VMM_DRIVERN) {
 593
 594         bridge->brg_ops.poll(bridge->vm, bridge->private_data);
 595     }
 596
 597 }
 598
 599 int v3_vnet_add_bridge(struct v3_vm_info * vm,
 600                        struct v3_vnet_bridge_ops * ops,
 601                        uint8_t type,
 602                        void * priv_data) {
 603     unsigned long flags;
 604     int bridge_free = 0;
 605     struct vnet_brg_dev * tmp_bridge = NULL;
 606
 607     flags = v3_lock_irqsave(vnet_state.lock);
 608
 609     if (vnet_state.bridge == NULL) {
 610         bridge_free = 1;
 611         vnet_state.bridge = (void *)1;
 612     }
 613
 614     v3_unlock_irqrestore(vnet_state.lock, flags);
 615
 616     if (bridge_free == 0) {
 617         PrintError("VNET/P Core: Bridge already set\n");
 618         return -1;
 619     }
 620
 621     tmp_bridge = (struct vnet_brg_dev *)V3_Malloc(sizeof(struct vnet_brg_dev));
 622
 623     if (tmp_bridge == NULL) {
 624         PrintError("Malloc Fails\n");
 625         vnet_state.bridge = NULL;
 626         return -1;
 627     }
 628
 629     tmp_bridge->vm = vm;
 630     tmp_bridge->brg_ops.input = ops->input;
 631     tmp_bridge->brg_ops.poll = ops->poll;
 632     tmp_bridge->private_data = priv_data;
 633     tmp_bridge->active = 1;
 634     tmp_bridge->mode = GUEST_DRIVERN;
 635     tmp_bridge->type = type;
 636
 637     /* make this atomic to avoid possible race conditions */
 638     flags = v3_lock_irqsave(vnet_state.lock);
 639     vnet_state.bridge = tmp_bridge;
 640     v3_unlock_irqrestore(vnet_state.lock, flags);
 641
 642     return 0;
 643 }
 644
 645
 646 int v3_init_vnet() {
 647     memset(&vnet_state, 0, sizeof(vnet_state));
 648
 649     INIT_LIST_HEAD(&(vnet_state.routes));
 650     INIT_LIST_HEAD(&(vnet_state.devs));
 651
 652     vnet_state.num_devs = 0;
 653     vnet_state.num_routes = 0;
 654
 655     if (v3_lock_init(&(vnet_state.lock)) == -1){
 656         PrintError("VNET/P Core: Fails to initiate lock\n");
 657     }
 658
 659     vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
 660
 661     if (vnet_state.route_cache == NULL) {
 662         PrintError("VNET/P Core: Fails to initiate route cache\n");
 663         return -1;
 664     }
 665
 666     PrintDebug("VNET/P Core is initiated\n");
 667
 668     return 0;
 669 }
 670
 671
 672 void v3_deinit_vnet(){
 673
 674     v3_lock_deinit(&(vnet_state.lock));
 675
 676     free_devices();
 677     free_routes();
 678
 679     v3_free_htable(vnet_state.route_cache, 1, 1);
 680     V3_Free(vnet_state.bridge);
 681 }
 682
 683