src/surf/storage.c

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012. The SimGrid Team.
   2  * All rights reserved.                                                                 */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package.             */
   6
   7 #include "xbt/ex.h"
   8 #include "xbt/dict.h"
   9 #include "portable.h"
  10 #include "surf_private.h"
  11 #include "storage_private.h"
  12 #include "surf/surf_resource.h"
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_storage, surf,
  15                                 "Logging specific to the SURF storage module");
  16
  17 xbt_lib_t storage_lib;
  18 int ROUTING_STORAGE_LEVEL;      //Routing for storagelevel
  19 int ROUTING_STORAGE_HOST_LEVEL;
  20 int SURF_STORAGE_LEVEL;
  21 xbt_lib_t storage_type_lib;
  22 int ROUTING_STORAGE_TYPE_LEVEL; //Routing for storage_type level
  23
  24 xbt_dynar_t mount_list = NULL;  /* temporary store of current mount storage */
  25
  26 surf_model_t surf_storage_model = NULL;
  27 lmm_system_t storage_maxmin_system = NULL;
  28 static int storage_selective_update = 0;
  29 static xbt_swag_t
  30     storage_running_action_set_that_does_not_need_being_checked = NULL;
  31
  32 #define GENERIC_LMM_ACTION(action) action->generic_lmm_action
  33 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  34
  35 typedef enum {
  36   READ = 0,
  37   WRITE = 1,
  38   DEFAULT = 2
  39 } STORAGE_execute_type_t;
  40
  41 typedef struct surf_storage {
  42   s_surf_resource_t generic_resource;
  43   const char* type;
  44   const char* content; /*should be a dict */
  45 } s_surf_storage_t, *surf_storage_t;
  46
  47 static void storage_action_state_set(surf_action_t action, e_surf_action_state_t state);
  48 static surf_action_t storage_action_sleep (void *storage, double duration);
  49 static surf_action_t storage_action_execute (void *storage, size_t size, STORAGE_execute_type_t type);
  50
  51 static surf_action_t storage_action_open(void *storage, const char* path, const char* mode)
  52 {
  53   XBT_DEBUG("\tOpen file '%s'",path);
  54   char *storage_type_id = xbt_lib_get_or_null(
  55       storage_lib,
  56       ((storage_t)storage)->generic_resource.name,
  57       ROUTING_STORAGE_LEVEL);
  58   storage_type_t storage_type = xbt_lib_get_or_null(storage_type_lib, storage_type_id,ROUTING_STORAGE_TYPE_LEVEL);
  59   xbt_dict_t content_dict = storage_type->content;
  60   content_t content = xbt_dict_get(content_dict,path);
  61
  62   surf_file_t file = xbt_new0(s_surf_file_t,1);
  63   file->name = xbt_strdup(path);
  64   file->content = content;
  65
  66   surf_action_t action = storage_action_execute(storage,0, DEFAULT);
  67   action->file = (void *)file;
  68   return action;
  69 }
  70
  71 static surf_action_t storage_action_close(void *storage, surf_file_t fp)
  72 {
  73   char *filename = fp->name;
  74   free(fp->name);
  75   fp->content = NULL;
  76   xbt_free(fp);
  77   surf_action_t action = storage_action_execute(storage,0, DEFAULT);
  78   XBT_DEBUG("\tClose file '%s'",filename);
  79   return action;
  80 }
  81
  82 static surf_action_t storage_action_read(void *storage, void* ptr, size_t size, size_t nmemb, surf_file_t stream)
  83 {
  84   char *filename = stream->name;
  85   content_t content = stream->content;
  86   XBT_DEBUG("\tRead file '%s' size '%Zu/%Zu'",filename,size,content->size);
  87   if(size > content->size)
  88     size = content->size;
  89   surf_action_t action = storage_action_execute(storage,size,READ);
  90   action->read_write = size;
  91   return action;
  92 }
  93
  94 static surf_action_t storage_action_write(void *storage, const void* ptr, size_t size, size_t nmemb, surf_file_t stream)
  95 {
  96   char *filename = stream->name;
  97   content_t content = stream->content;
  98   XBT_DEBUG("\tWrite file '%s' size '%Zu/%Zu'",filename,size,content->size);
  99
 100   surf_action_t action = storage_action_execute(storage,size,WRITE);
 101   action->read_write = size;
 102   content->size += size;
 103   return action;
 104 }
 105
 106 static surf_action_t storage_action_stat(void *storage, int fd, void* buf)
 107 {
 108   THROW_UNIMPLEMENTED;
 109   return NULL;
 110 }
 111
 112 static surf_action_t storage_action_execute (void *storage, size_t size, STORAGE_execute_type_t type)
 113 {
 114   surf_action_storage_t action = NULL;
 115   storage_t STORAGE = storage;
 116
 117   XBT_IN("(%s,%Zu)", surf_resource_name(STORAGE), size);
 118   action =
 119       surf_action_new(sizeof(s_surf_action_storage_t), size, surf_storage_model,
 120           STORAGE->state_current != SURF_RESOURCE_ON);
 121
 122   GENERIC_LMM_ACTION(action).suspended = 0;     /* Should be useless because of the
 123                                                    calloc but it seems to help valgrind... */
 124
 125   GENERIC_LMM_ACTION(action).variable =
 126       lmm_variable_new(storage_maxmin_system, action, 1.0, -1.0 , 3);
 127
 128   if(type == DEFAULT)
 129   lmm_expand(storage_maxmin_system, STORAGE->constraint,
 130              GENERIC_LMM_ACTION(action).variable, 1.0);
 131   else if(type == READ)
 132     lmm_expand(storage_maxmin_system, STORAGE->constraint_read,
 133                GENERIC_LMM_ACTION(action).variable, 1.0);
 134   else if(type == WRITE)
 135     lmm_expand(storage_maxmin_system, STORAGE->constraint_write,
 136                GENERIC_LMM_ACTION(action).variable, 1.0);
 137   else xbt_die("storage_action_execute with type '%d'",(int) type);
 138
 139   XBT_OUT();
 140   return (surf_action_t) action;
 141 }
 142
 143 static surf_action_t storage_action_sleep (void *storage, double duration)
 144 {
 145   surf_action_storage_t action = NULL;
 146
 147   if (duration > 0)
 148     duration = MAX(duration, MAXMIN_PRECISION);
 149
 150   XBT_IN("(%s,%g)", surf_resource_name(storage), duration);
 151   action = (surf_action_storage_t) storage_action_execute(storage, 1.0, DEFAULT);
 152   GENERIC_ACTION(action).max_duration = duration;
 153   GENERIC_LMM_ACTION(action).suspended = 2;
 154   if (duration == NO_MAX_DURATION) {
 155     /* Move to the *end* of the corresponding action set. This convention
 156        is used to speed up update_resource_state  */
 157     xbt_swag_remove(action, ((surf_action_t) action)->state_set);
 158     ((surf_action_t) action)->state_set =
 159         storage_running_action_set_that_does_not_need_being_checked;
 160     xbt_swag_insert(action, ((surf_action_t) action)->state_set);
 161   }
 162
 163   lmm_update_variable_weight(storage_maxmin_system,
 164                              GENERIC_LMM_ACTION(action).variable, 0.0);
 165
 166   XBT_OUT();
 167   return (surf_action_t) action;
 168 }
 169
 170 static void* storage_create_resource(const char* id, const char* model,const char* type_id)
 171 {
 172   storage_t storage = NULL;
 173
 174   xbt_assert(!surf_storage_resource_by_name(id),
 175               "Storage '%s' declared several times in the platform file",
 176               id);
 177   storage = (storage_t) surf_resource_new(sizeof(s_storage_t),
 178           surf_storage_model, id,NULL);
 179
 180   storage->state_current = SURF_RESOURCE_ON;
 181
 182   storage_type_t storage_type = xbt_lib_get_or_null(storage_type_lib, type_id,ROUTING_STORAGE_TYPE_LEVEL);
 183   size_t Bread  = atof(xbt_dict_get(storage_type->properties,"Bread"));
 184   size_t Bwrite = atof(xbt_dict_get(storage_type->properties,"Bwrite"));
 185   size_t Bconnexion   = atof(xbt_dict_get(storage_type->properties,"Bconnexion"));
 186   XBT_INFO("Create resource with Bconnexion '%Zu' Bread '%Zu' Bwrite '%Zu'",Bconnexion,Bread,Bwrite);
 187   storage->constraint       = lmm_constraint_new(storage_maxmin_system, storage, Bconnexion);
 188   storage->constraint_read  = lmm_constraint_new(storage_maxmin_system, storage, Bread);
 189   storage->constraint_write = lmm_constraint_new(storage_maxmin_system, storage, Bwrite);
 190
 191   xbt_lib_set(storage_lib, id, SURF_STORAGE_LEVEL, storage);
 192
 193   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' \n\t\tmodel '%s' \n\t\tproperties '%p'\n\t\tBread '%Zu'\n",
 194       id,
 195       model,
 196       type_id,
 197       storage_type->properties,
 198       Bread);
 199
 200   return storage;
 201 }
 202
 203 static void storage_finalize(void)
 204 {
 205   lmm_system_free(storage_maxmin_system);
 206   storage_maxmin_system = NULL;
 207
 208   surf_model_exit(surf_storage_model);
 209   surf_storage_model = NULL;
 210
 211   xbt_swag_free
 212       (storage_running_action_set_that_does_not_need_being_checked);
 213   storage_running_action_set_that_does_not_need_being_checked = NULL;
 214 }
 215
 216 static void storage_update_actions_state(double now, double delta)
 217 {
 218   surf_action_storage_t action = NULL;
 219   surf_action_storage_t next_action = NULL;
 220   xbt_swag_t running_actions = surf_storage_model->states.running_action_set;
 221   xbt_swag_foreach_safe(action, next_action, running_actions) {
 222
 223     double_update(&(GENERIC_ACTION(action).remains),
 224                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * delta);
 225     if (GENERIC_LMM_ACTION(action).generic_action.max_duration != NO_MAX_DURATION)
 226       double_update(&(GENERIC_ACTION(action).max_duration), delta);
 227     if ((GENERIC_ACTION(action).remains <= 0) &&
 228         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 229       GENERIC_ACTION(action).finish = surf_get_clock();
 230       storage_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 231     } else if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION) &&
 232                (GENERIC_ACTION(action).max_duration <= 0)) {
 233       GENERIC_ACTION(action).finish = surf_get_clock();
 234       storage_action_state_set((surf_action_t) action, SURF_ACTION_DONE);
 235     }
 236   }
 237
 238   return;
 239 }
 240
 241 static double storage_share_resources(double NOW)
 242 {
 243   XBT_DEBUG("storage_share_resources %f",NOW);
 244   s_surf_action_storage_t action;
 245   return generic_maxmin_share_resources(surf_storage_model->states.running_action_set,
 246       xbt_swag_offset(action, generic_lmm_action.variable),
 247       storage_maxmin_system, lmm_solve);
 248 }
 249
 250 static int storage_resource_used(void *resource_id)
 251 {
 252   THROW_UNIMPLEMENTED;
 253   return 0;
 254 }
 255
 256 static void storage_resources_state(void *id, tmgr_trace_event_t event_type,
 257                                  double value, double time)
 258 {
 259   THROW_UNIMPLEMENTED;
 260 }
 261
 262 static int storage_action_unref(surf_action_t action)
 263 {
 264   action->refcount--;
 265   if (!action->refcount) {
 266     xbt_swag_remove(action, action->state_set);
 267     if (((surf_action_lmm_t) action)->variable)
 268       lmm_variable_free(storage_maxmin_system,
 269                         ((surf_action_lmm_t) action)->variable);
 270 #ifdef HAVE_TRACING
 271     xbt_free(action->category);
 272 #endif
 273     surf_action_free(&action);
 274     return 1;
 275   }
 276   return 0;
 277 }
 278
 279 static void storage_action_cancel(surf_action_t action)
 280 {
 281   surf_action_state_set(action, SURF_ACTION_FAILED);
 282   return;
 283 }
 284
 285 static void storage_action_state_set(surf_action_t action, e_surf_action_state_t state)
 286 {
 287   surf_action_state_set(action, state);
 288   return;
 289 }
 290
 291 static void storage_action_suspend(surf_action_t action)
 292 {
 293   XBT_IN("(%p)", action);
 294   if (((surf_action_lmm_t) action)->suspended != 2) {
 295     lmm_update_variable_weight(storage_maxmin_system,
 296                                ((surf_action_lmm_t) action)->variable,
 297                                0.0);
 298     ((surf_action_lmm_t) action)->suspended = 1;
 299   }
 300   XBT_OUT();
 301 }
 302
 303 static void storage_action_resume(surf_action_t action)
 304 {
 305   THROW_UNIMPLEMENTED;
 306 }
 307
 308 static int storage_action_is_suspended(surf_action_t action)
 309 {
 310   return (((surf_action_lmm_t) action)->suspended == 1);
 311 }
 312
 313 static void storage_action_set_max_duration(surf_action_t action, double duration)
 314 {
 315   THROW_UNIMPLEMENTED;
 316 }
 317
 318 static void storage_action_set_priority(surf_action_t action, double priority)
 319 {
 320   THROW_UNIMPLEMENTED;
 321 }
 322
 323 static void parse_storage_init(sg_platf_storage_cbarg_t storage)
 324 {
 325   void* stype = xbt_lib_get_or_null(storage_type_lib,
 326                                     storage->type_id,
 327                                     ROUTING_STORAGE_TYPE_LEVEL);
 328   if(!stype) xbt_die("No storage type '%s'",storage->type_id);
 329 //  XBT_INFO("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' \n\t\tmodel '%s' \n\t\tcontent '%s'\n\t\tproperties '%p'\n",
 330 //      storage->id,
 331 //      ((storage_type_t) stype)->model,
 332 //      ((storage_type_t) stype)->type_id,
 333 //      ((storage_type_t) stype)->content,
 334 //      ((storage_type_t) stype)->properties);
 335
 336  storage_create_resource(storage->id,
 337      ((storage_type_t) stype)->model,
 338      ((storage_type_t) stype)->type_id);
 339 }
 340
 341 static void parse_mstorage_init(sg_platf_mstorage_cbarg_t mstorage)
 342 {
 343   XBT_DEBUG("parse_mstorage_init");
 344 }
 345
 346 static void parse_storage_type_init(sg_platf_storage_type_cbarg_t storagetype_)
 347 {
 348   XBT_DEBUG("parse_storage_type_init");
 349 }
 350
 351 static void parse_mount_init(sg_platf_mount_cbarg_t mount)
 352 {
 353   XBT_DEBUG("parse_mount_init");
 354 }
 355
 356 static void storage_define_callbacks()
 357 {
 358   sg_platf_storage_add_cb(parse_storage_init);
 359   sg_platf_storage_type_add_cb(parse_storage_type_init);
 360   sg_platf_mstorage_add_cb(parse_mstorage_init);
 361   sg_platf_mount_add_cb(parse_mount_init);
 362 }
 363
 364 static void surf_storage_model_init_internal(void)
 365 {
 366   s_surf_action_t action;
 367
 368   XBT_DEBUG("surf_storage_model_init_internal");
 369   surf_storage_model = surf_model_init();
 370
 371   storage_running_action_set_that_does_not_need_being_checked =
 372       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 373
 374   surf_storage_model->name = "Storage";
 375   surf_storage_model->action_unref = storage_action_unref;
 376   surf_storage_model->action_cancel = storage_action_cancel;
 377   surf_storage_model->action_state_set = storage_action_state_set;
 378
 379   surf_storage_model->model_private->finalize = storage_finalize;
 380   surf_storage_model->model_private->update_actions_state = storage_update_actions_state;
 381   surf_storage_model->model_private->share_resources = storage_share_resources;
 382   surf_storage_model->model_private->resource_used = storage_resource_used;
 383   surf_storage_model->model_private->update_resource_state = storage_resources_state;
 384
 385   surf_storage_model->suspend = storage_action_suspend;
 386   surf_storage_model->resume = storage_action_resume;
 387   surf_storage_model->is_suspended = storage_action_is_suspended;
 388   surf_storage_model->set_max_duration = storage_action_set_max_duration;
 389   surf_storage_model->set_priority = storage_action_set_priority;
 390
 391   surf_storage_model->extension.storage.open = storage_action_open;
 392   surf_storage_model->extension.storage.close = storage_action_close;
 393   surf_storage_model->extension.storage.read = storage_action_read;
 394   surf_storage_model->extension.storage.write = storage_action_write;
 395   surf_storage_model->extension.storage.stat = storage_action_stat;
 396   surf_storage_model->extension.storage.create_resource = storage_create_resource;
 397
 398   if (!storage_maxmin_system) {
 399     storage_maxmin_system = lmm_system_new(storage_selective_update);
 400   }
 401
 402 }
 403
 404 void surf_storage_model_init_default(void)
 405 {
 406   surf_storage_model_init_internal();
 407   storage_define_callbacks();
 408
 409   xbt_dynar_push(model_list, &surf_storage_model);
 410 }
 411
 412 static void storage_parse_storage(sg_platf_storage_cbarg_t storage)
 413 {
 414   xbt_assert(!xbt_lib_get_or_null(storage_lib, storage->id,ROUTING_STORAGE_LEVEL),
 415                "Reading a storage, processing unit \"%s\" already exists", storage->id);
 416
 417   // Verification of an existing type_id
 418 #ifndef NDEBUG
 419   void* storage_type = xbt_lib_get_or_null(storage_type_lib, storage->type_id,ROUTING_STORAGE_TYPE_LEVEL);
 420 #endif
 421   xbt_assert(storage_type,"Reading a storage, type id \"%s\" does not exists", storage->type_id);
 422
 423   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s'",
 424       storage->id,
 425       storage->type_id);
 426
 427   xbt_lib_set(storage_lib,
 428       storage->id,
 429       ROUTING_STORAGE_LEVEL,
 430       (void *) xbt_strdup(storage->type_id));
 431 }
 432
 433 static void free_storage_content(void *p)
 434 {
 435   content_t content = p;
 436   free(content->date);
 437   free(content->group);
 438   free(content->time);
 439   free(content->user);
 440   free(content->user_rights);
 441   free(content);
 442 }
 443
 444 static xbt_dict_t parse_storage_content(const char *filename)
 445 {
 446   if ((!filename) || (strcmp(filename, "") == 0))
 447     return NULL;
 448
 449   xbt_dict_t parse_content = xbt_dict_new_homogeneous(free_storage_content);
 450   FILE *file = NULL;
 451
 452   file = surf_fopen(filename, "r");
 453   xbt_assert(file != NULL, "Cannot open file '%s' (path=%s)", filename,
 454               xbt_str_join(surf_path, ":"));
 455
 456   char *line = NULL;
 457   size_t len = 0;
 458   ssize_t read;
 459   char user_rights[12];
 460   char user[100];
 461   char group[100];
 462   char date[12];
 463   char time[12];
 464   char path[1024];
 465   int nb, size;
 466
 467   content_t content;
 468
 469   while ((read = getline(&line, &len, file)) != -1) {
 470     content = xbt_new0(s_content_t,1);
 471     if(sscanf(line,"%s %d %s %s %d %s %s %s",user_rights,&nb,user,group,&size,date,time,path)==8) {
 472       content->date = xbt_strdup(date);
 473       content->group = xbt_strdup(group);
 474       content->size = size;
 475       content->time = xbt_strdup(time);
 476       content->user = xbt_strdup(user);
 477       content->user_rights = xbt_strdup(user_rights);
 478       xbt_dict_set(parse_content,path,content,NULL);
 479     } else {
 480       xbt_die("Be sure of passing a good format for content file.\n");
 481       // You can generate this kind of file with command line:
 482       // find /path/you/want -type f -exec ls -l {} \; 2>/dev/null > ./content.txt
 483     }
 484   }
 485   if (line)
 486       free(line);
 487
 488   fclose(file);
 489   return parse_content;
 490 }
 491
 492 static void storage_parse_storage_type(sg_platf_storage_type_cbarg_t storage_type)
 493 {
 494   xbt_assert(!xbt_lib_get_or_null(storage_type_lib, storage_type->id,ROUTING_STORAGE_TYPE_LEVEL),
 495                "Reading a storage type, processing unit \"%s\" already exists", storage_type->id);
 496
 497   storage_type_t stype = xbt_new0(s_storage_type_t, 1);
 498   stype->model = xbt_strdup(storage_type->model);
 499   stype->properties = storage_type->properties;
 500   stype->content = parse_storage_content(storage_type->content);
 501   stype->type_id = xbt_strdup(storage_type->id);
 502
 503   XBT_DEBUG("ROUTING Create a storage type id '%s' with model '%s' content '%s' and properties '%p'",
 504       stype->type_id,
 505       stype->model,
 506       storage_type->content,
 507       stype->properties);
 508
 509   xbt_lib_set(storage_type_lib,
 510       stype->type_id,
 511       ROUTING_STORAGE_TYPE_LEVEL,
 512       (void *) stype);
 513 }
 514 static void storage_parse_mstorage(sg_platf_mstorage_cbarg_t mstorage)
 515 {
 516   THROW_UNIMPLEMENTED;
 517 //  mount_t mnt = xbt_new0(s_mount_t, 1);
 518 //  mnt->id = xbt_strdup(mstorage->type_id);
 519 //  mnt->name = xbt_strdup(mstorage->name);
 520 //
 521 //  if(!mount_list){
 522 //    XBT_DEBUG("Creata a Mount list for %s",A_surfxml_host_id);
 523 //    mount_list = xbt_dynar_new(sizeof(char *), NULL);
 524 //  }
 525 //  xbt_dynar_push(mount_list,(void *) mnt);
 526 //  free(mnt->id);
 527 //  free(mnt->name);
 528 //  xbt_free(mnt);
 529 //  XBT_DEBUG("ROUTING Mount a storage name '%s' with type_id '%s'",mstorage->name, mstorage->id);
 530 }
 531
 532 static void mount_free(void *p)
 533 {
 534   mount_t mnt = p;
 535   xbt_free(mnt->name);
 536 }
 537
 538 static void storage_parse_mount(sg_platf_mount_cbarg_t mount)
 539 {
 540   // Verification of an existing storage
 541 #ifndef NDEBUG
 542   void* storage = xbt_lib_get_or_null(storage_lib, mount->id,ROUTING_STORAGE_LEVEL);
 543 #endif
 544   xbt_assert(storage,"Disk id \"%s\" does not exists", mount->id);
 545
 546   XBT_DEBUG("ROUTING Mount '%s' on '%s'",mount->id, mount->name);
 547
 548   s_mount_t mnt;
 549   mnt.id = surf_storage_resource_by_name(mount->id);
 550   mnt.name = xbt_strdup(mount->name);
 551
 552   if(!mount_list){
 553     XBT_DEBUG("Create a Mount list for %s",A_surfxml_host_id);
 554     mount_list = xbt_dynar_new(sizeof(s_mount_t), mount_free);
 555   }
 556   xbt_dynar_push(mount_list,&mnt);
 557 }
 558
 559 static XBT_INLINE void routing_storage_type_free(void *r)
 560 {
 561   storage_type_t stype = r;
 562   free(stype->model);
 563   free(stype->type_id);
 564   xbt_dict_free(&(stype->properties));
 565   xbt_dict_free(&(stype->content));
 566   free(stype);
 567 }
 568
 569 static XBT_INLINE void routing_storage_host_free(void *r)
 570 {
 571   xbt_dynar_t dyn = r;
 572   xbt_dynar_free(&dyn);
 573 }
 574
 575 void storage_register_callbacks() {
 576
 577   ROUTING_STORAGE_LEVEL = xbt_lib_add_level(storage_lib,xbt_free);
 578   ROUTING_STORAGE_HOST_LEVEL = xbt_lib_add_level(storage_lib,routing_storage_host_free);
 579   ROUTING_STORAGE_TYPE_LEVEL = xbt_lib_add_level(storage_type_lib,routing_storage_type_free);
 580   SURF_STORAGE_LEVEL = xbt_lib_add_level(storage_lib,surf_resource_free);
 581
 582   sg_platf_storage_add_cb(storage_parse_storage);
 583   sg_platf_mstorage_add_cb(storage_parse_mstorage);
 584   sg_platf_storage_type_add_cb(storage_parse_storage_type);
 585   sg_platf_mount_add_cb(storage_parse_mount);
 586 }