1 /* Copyright (c) 2004-2016. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/s4u/host.hpp"
7 #include "src/msg/msg_private.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_io, msg, "Logging specific to MSG (io)");
14 /** @addtogroup msg_file
15 * (#msg_file_t) and the functions for managing it.
20 /********************************* File **************************************/
21 void __MSG_file_get_info(msg_file_t fd){
23 msg_file_priv_t priv = MSG_file_priv(fd);
24 xbt_dynar_t info = simcall_file_get_info(priv->simdata->smx_file);
27 priv->content_type = xbt_dynar_pop_as(info, char *);
28 priv->storage_type = xbt_dynar_pop_as(info, char *);
29 priv->storageId = xbt_dynar_pop_as(info, char *);
30 priv->mount_point = xbt_dynar_pop_as(info, char *);
31 psize = xbt_dynar_pop_as(info, sg_size_t*);
34 xbt_dynar_free_container(&info);
37 static int MSG_host_get_file_descriptor_id(msg_host_t host)
39 simgrid::MsgHostExt* priv = host->extension<simgrid::MsgHostExt>();
40 if (priv->file_descriptor_table == nullptr) {
41 priv->file_descriptor_table = new std::vector<int>(sg_storage_max_file_descriptors);
42 std::iota(priv->file_descriptor_table->rbegin(), priv->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
44 xbt_assert(!priv->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
45 int desc = priv->file_descriptor_table->back();
46 priv->file_descriptor_table->pop_back();
50 static void MSG_host_release_file_descriptor_id(msg_host_t host, int id)
52 host->extension<simgrid::MsgHostExt>()->file_descriptor_table->push_back(id);
57 * \brief Set the user data of a #msg_file_t.
59 * This functions attach \a data to \a file.
61 msg_error_t MSG_file_set_data(msg_file_t fd, void *data)
63 msg_file_priv_t priv = MSG_file_priv(fd);
70 * \brief Return the user data of a #msg_file_t.
72 * This functions checks whether \a file is a valid pointer and return the user data associated to \a file if possible.
74 void *MSG_file_get_data(msg_file_t fd)
76 msg_file_priv_t priv = MSG_file_priv(fd);
81 * \brief Display information related to a file descriptor
83 * \param fd is a the file descriptor
85 void MSG_file_dump (msg_file_t fd){
86 /* Update the cached information first */
87 __MSG_file_get_info(fd);
89 msg_file_priv_t priv = MSG_file_priv(fd);
90 XBT_INFO("File Descriptor information:\n"
91 "\t\tFull path: '%s'\n"
93 "\t\tMount point: '%s'\n"
94 "\t\tStorage Id: '%s'\n"
95 "\t\tStorage Type: '%s'\n"
96 "\t\tContent Type: '%s'\n"
97 "\t\tFile Descriptor Id: %d",
98 priv->fullpath, priv->size, priv->mount_point,
99 priv->storageId, priv->storage_type,
100 priv->content_type, priv->desc_id);
103 /** \ingroup msg_file
104 * \brief Read a file (local or remote)
106 * \param size of the file to read
107 * \param fd is a the file descriptor
108 * \return the number of bytes successfully read or -1 if an error occurred
110 sg_size_t MSG_file_read(msg_file_t fd, sg_size_t size)
112 msg_file_priv_t file_priv = MSG_file_priv(fd);
115 if (file_priv->size == 0) /* Nothing to read, return */
118 /* Find the host where the file is physically located and read it */
119 msg_storage_t storage_src = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId));
120 msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
121 msg_host_t attached_host = MSG_host_by_name(storage_priv_src->hostname);
122 read_size = simcall_file_read(file_priv->simdata->smx_file, size, attached_host);
124 if (strcmp(storage_priv_src->hostname, MSG_host_self()->cname())) {
125 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
126 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, read_size);
127 msg_host_t *m_host_list = nullptr;
128 m_host_list = xbt_new0(msg_host_t, 2);
130 m_host_list[0] = MSG_host_self();
131 m_host_list[1] = attached_host;
132 double flops_amount[] = { 0, 0};
133 double bytes_amount[] = { 0, 0, static_cast<double>(read_size), 0 };
135 msg_task_t task = MSG_parallel_task_create("file transfer for read", 2, m_host_list, flops_amount, bytes_amount,
137 msg_error_t transfer = MSG_parallel_task_execute(task);
138 MSG_task_destroy(task);
139 xbt_free(m_host_list);
140 if(transfer != MSG_OK){
141 if (transfer == MSG_HOST_FAILURE)
142 XBT_WARN("Transfer error, %s remote host just turned off!", attached_host->cname());
143 if (transfer == MSG_TASK_CANCELED)
144 XBT_WARN("Transfer error, task has been canceled!");
152 /** \ingroup msg_file
153 * \brief Write into a file (local or remote)
155 * \param size of the file to write
156 * \param fd is a the file descriptor
157 * \return the number of bytes successfully write or -1 if an error occurred
159 sg_size_t MSG_file_write(msg_file_t fd, sg_size_t size)
161 msg_file_priv_t file_priv = MSG_file_priv(fd);
163 if (size == 0) /* Nothing to write, return */
166 /* Find the host where the file is physically located (remote or local)*/
167 msg_storage_t storage_src = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId));
168 msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
169 msg_host_t attached_host = MSG_host_by_name(storage_priv_src->hostname);
171 if (strcmp(storage_priv_src->hostname, MSG_host_self()->cname())) {
172 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
173 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", storage_priv_src->hostname, size);
174 msg_host_t *m_host_list = nullptr;
175 m_host_list = xbt_new0(msg_host_t, 2);
177 m_host_list[0] = MSG_host_self();
178 m_host_list[1] = attached_host;
179 double flops_amount[] = { 0, 0 };
180 double bytes_amount[] = { 0, static_cast<double>(size), 0, 0 };
182 msg_task_t task = MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount,
184 msg_error_t transfer = MSG_parallel_task_execute(task);
185 MSG_task_destroy(task);
187 if(transfer != MSG_OK){
188 if (transfer == MSG_HOST_FAILURE)
189 XBT_WARN("Transfer error, %s remote host just turned off!", attached_host->cname());
190 if (transfer == MSG_TASK_CANCELED)
191 XBT_WARN("Transfer error, task has been canceled!");
196 /* Write file on local or remote host */
197 sg_size_t offset = simcall_file_tell(file_priv->simdata->smx_file);
198 sg_size_t write_size = simcall_file_write(file_priv->simdata->smx_file, size, attached_host);
199 file_priv->size = offset+write_size;
204 /** \ingroup msg_file
205 * \brief Opens the file whose name is the string pointed to by path
207 * \param fullpath is the file location on the storage
208 * \param data user data to attach to the file
210 * \return An #msg_file_t associated to the file
212 msg_file_t MSG_file_open(const char* fullpath, void* data)
215 msg_file_priv_t priv = xbt_new(s_msg_file_priv_t, 1);
217 priv->fullpath = xbt_strdup(fullpath);
218 priv->simdata = xbt_new0(s_simdata_file_t,1);
219 priv->simdata->smx_file = simcall_file_open(fullpath, MSG_host_self());
220 priv->desc_id = MSG_host_get_file_descriptor_id(MSG_host_self());
222 name = bprintf("%s:%s:%d", priv->fullpath, MSG_host_self()->cname(), priv->desc_id);
224 xbt_lib_set(file_lib, name, MSG_FILE_LEVEL, priv);
225 msg_file_t fd = static_cast<msg_file_t>(xbt_lib_get_elm_or_null(file_lib, name));
226 __MSG_file_get_info(fd);
232 /** \ingroup msg_file
233 * \brief Close the file
235 * \param fd is the file to close
236 * \return 0 on success or 1 on error
238 int MSG_file_close(msg_file_t fd)
241 msg_file_priv_t priv = MSG_file_priv(fd);
243 xbt_free(priv->data);
245 int res = simcall_file_close(priv->simdata->smx_file, MSG_host_self());
246 name = bprintf("%s:%s:%d", priv->fullpath, MSG_host_self()->cname(), priv->desc_id);
247 MSG_host_release_file_descriptor_id(MSG_host_self(), priv->desc_id);
248 xbt_lib_unset(file_lib, name, MSG_FILE_LEVEL, 1);
253 /** \ingroup msg_file
254 * \brief Unlink the file pointed by fd
256 * \param fd is the file descriptor (#msg_file_t)
257 * \return 0 on success or 1 on error
259 msg_error_t MSG_file_unlink(msg_file_t fd)
261 msg_file_priv_t file_priv = MSG_file_priv(fd);
262 /* Find the host where the file is physically located (remote or local)*/
263 msg_storage_t storage_src = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId));
264 msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
265 msg_host_t attached_host = MSG_host_by_name(storage_priv_src->hostname);
266 int res = simcall_file_unlink(file_priv->simdata->smx_file, attached_host);
267 return static_cast<msg_error_t>(res);
270 /** \ingroup msg_file
271 * \brief Return the size of a file
273 * \param fd is the file descriptor (#msg_file_t)
274 * \return the size of the file (as a #sg_size_t)
276 sg_size_t MSG_file_get_size(msg_file_t fd){
277 msg_file_priv_t priv = MSG_file_priv(fd);
278 return simcall_file_get_size(priv->simdata->smx_file);
283 * \brief Set the file position indicator in the msg_file_t by adding offset bytes
284 * to the position specified by origin (either SEEK_SET, SEEK_CUR, or SEEK_END).
286 * \param fd : file object that identifies the stream
287 * \param offset : number of bytes to offset from origin
288 * \param origin : Position used as reference for the offset. It is specified by one of the following constants defined
289 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
290 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
291 * \return If successful, the function returns MSG_OK (=0). Otherwise, it returns MSG_TASK_CANCELED (=8).
293 msg_error_t MSG_file_seek(msg_file_t fd, sg_offset_t offset, int origin)
295 msg_file_priv_t priv = MSG_file_priv(fd);
296 return static_cast<msg_error_t>(simcall_file_seek(priv->simdata->smx_file, offset, origin));
301 * \brief Returns the current value of the position indicator of the file
303 * \param fd : file object that identifies the stream
304 * \return On success, the current value of the position indicator is returned.
307 sg_size_t MSG_file_tell(msg_file_t fd)
309 msg_file_priv_t priv = MSG_file_priv(fd);
310 return simcall_file_tell(priv->simdata->smx_file);
313 const char *MSG_file_get_name(msg_file_t fd) {
314 xbt_assert((fd != nullptr), "Invalid parameters");
315 msg_file_priv_t priv = MSG_file_priv(fd);
316 return priv->fullpath;
321 * \brief Move a file to another location on the *same mount point*.
324 msg_error_t MSG_file_move (msg_file_t fd, const char* fullpath)
326 msg_file_priv_t priv = MSG_file_priv(fd);
327 return static_cast<msg_error_t>(simcall_file_move(priv->simdata->smx_file, fullpath));
332 * \brief Copy a file to another location on a remote host.
333 * \param file : the file to move
334 * \param host : the remote host where the file has to be copied
335 * \param fullpath : the complete path destination on the remote host
336 * \return If successful, the function returns MSG_OK. Otherwise, it returns MSG_TASK_CANCELED.
338 msg_error_t MSG_file_rcopy (msg_file_t file, msg_host_t host, const char* fullpath)
340 msg_file_priv_t file_priv = MSG_file_priv(file);
343 /* Find the host where the file is physically located and read it */
344 msg_storage_t storage_src = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib, file_priv->storageId));
345 msg_storage_priv_t storage_priv_src = MSG_storage_priv(storage_src);
346 msg_host_t attached_host = MSG_host_by_name(storage_priv_src->hostname);
347 MSG_file_seek(file, 0, SEEK_SET);
348 read_size = simcall_file_read(file_priv->simdata->smx_file, file_priv->size, attached_host);
350 /* Find the real host destination where the file will be physically stored */
351 xbt_dict_cursor_t cursor = nullptr;
352 msg_storage_t storage_dest = nullptr;
353 msg_host_t host_dest;
354 size_t longest_prefix_length = 0;
356 xbt_dict_t storage_list = host->mountedStoragesAsDict();
359 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
360 char* file_mount_name = static_cast<char *>(xbt_malloc ((strlen(mount_name)+1)));
361 strncpy(file_mount_name,fullpath,strlen(mount_name)+1);
362 file_mount_name[strlen(mount_name)] = '\0';
364 if(!strcmp(file_mount_name,mount_name) && strlen(mount_name)>longest_prefix_length){
365 /* The current mount name is found in the full path and is bigger than the previous*/
366 longest_prefix_length = strlen(mount_name);
367 storage_dest = (msg_storage_t) xbt_lib_get_elm_or_null(storage_lib, storage_name);
369 xbt_free(file_mount_name);
371 xbt_dict_free(&storage_list);
373 char* host_name_dest = nullptr;
374 if(longest_prefix_length>0){
375 /* Mount point found, retrieve the host the storage is attached to */
376 msg_storage_priv_t storage_dest_priv = MSG_storage_priv(storage_dest);
377 host_name_dest = (char*)storage_dest_priv->hostname;
378 host_dest = MSG_host_by_name(host_name_dest);
380 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->cname());
381 return MSG_TASK_CANCELED;
384 XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, storage_priv_src->hostname,
386 msg_host_t *m_host_list = nullptr;
387 m_host_list = xbt_new0(msg_host_t, 2);
389 m_host_list[0] = attached_host;
390 m_host_list[1] = host_dest;
391 double flops_amount[] = { 0, 0 };
392 double bytes_amount[] = { 0, static_cast<double>(read_size), 0, 0 };
395 MSG_parallel_task_create("file transfer for write", 2, m_host_list, flops_amount, bytes_amount, nullptr);
396 msg_error_t transfer = MSG_parallel_task_execute(task);
397 MSG_task_destroy(task);
398 xbt_free(m_host_list);
399 if(transfer != MSG_OK){
400 if (transfer == MSG_HOST_FAILURE)
401 XBT_WARN("Transfer error, %s remote host just turned off!", host_name_dest);
402 if (transfer == MSG_TASK_CANCELED)
403 XBT_WARN("Transfer error, task has been canceled!");
408 /* Create file on remote host, write it and close it */
409 smx_file_t smx_file = simcall_file_open(fullpath, host_dest);
410 simcall_file_write(smx_file, read_size, host_dest);
411 simcall_file_close(smx_file, host_dest);
417 * \brief Move a file to another location on a remote host.
418 * \param file : the file to move
419 * \param host : the remote host where the file has to be moved
420 * \param fullpath : the complete path destination on the remote host
421 * \return If successful, the function returns MSG_OK. Otherwise, it returns MSG_TASK_CANCELED.
423 msg_error_t MSG_file_rmove (msg_file_t file, msg_host_t host, const char* fullpath)
425 msg_error_t res = MSG_file_rcopy(file, host, fullpath);
426 MSG_file_unlink(file);
431 * \brief Destroys a file (internal call only)
433 void __MSG_file_destroy(msg_file_priv_t file) {
434 xbt_free(file->fullpath);
435 xbt_free(file->simdata);
439 /********************************* Storage **************************************/
440 /** @addtogroup msg_storage_management
441 * (#msg_storage_t) and the functions for managing it.
444 msg_storage_t __MSG_storage_create(smx_storage_t storage)
446 const char *name = SIMIX_storage_get_name(storage);
447 const char *host = SIMIX_storage_get_host(storage);
448 msg_storage_priv_t storage_private = xbt_new0(s_msg_storage_priv_t, 1);
449 storage_private->hostname = host;
450 xbt_lib_set(storage_lib,name,MSG_STORAGE_LEVEL,storage_private);
451 return xbt_lib_get_elm_or_null(storage_lib, name);
455 * \brief Destroys a storage (internal call only)
457 void __MSG_storage_destroy(msg_storage_priv_t storage) {
461 /** \ingroup msg_storage_management
463 * \brief Returns the name of the #msg_storage_t.
465 * This functions checks whether a storage is a valid pointer or not and return its name.
467 const char *MSG_storage_get_name(msg_storage_t storage) {
468 xbt_assert((storage != nullptr), "Invalid parameters");
469 return SIMIX_storage_get_name(storage);
472 /** \ingroup msg_storage_management
473 * \brief Returns the free space size of a storage element
474 * \param storage a storage
475 * \return the free space size of the storage element (as a #sg_size_t)
477 sg_size_t MSG_storage_get_free_size(msg_storage_t storage){
478 return simcall_storage_get_free_size(storage);
481 /** \ingroup msg_storage_management
482 * \brief Returns the used space size of a storage element
483 * \param storage a storage
484 * \return the used space size of the storage element (as a #sg_size_t)
486 sg_size_t MSG_storage_get_used_size(msg_storage_t storage){
487 return simcall_storage_get_used_size(storage);
490 /** \ingroup msg_storage_management
491 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this storage
492 * \param storage a storage
493 * \return a dict containing the properties
495 xbt_dict_t MSG_storage_get_properties(msg_storage_t storage)
497 xbt_assert((storage != nullptr), "Invalid parameters (storage is nullptr)");
498 return (simcall_storage_get_properties(storage));
501 /** \ingroup msg_storage_management
502 * \brief Change the value of a given storage property
504 * \param storage a storage
505 * \param name a property name
506 * \param value what to change the property to
508 void MSG_storage_set_property_value(msg_storage_t storage, const char* name, char* value)
510 xbt_dict_set(MSG_storage_get_properties(storage), name, value, nullptr);
513 /** \ingroup m_storage_management
514 * \brief Returns the value of a given storage property
516 * \param storage a storage
517 * \param name a property name
518 * \return value of a property (or nullptr if property not set)
520 const char *MSG_storage_get_property_value(msg_storage_t storage, const char *name)
522 return static_cast<char*>(xbt_dict_get_or_null(MSG_storage_get_properties(storage), name));
525 /** \ingroup msg_storage_management
526 * \brief Finds a msg_storage_t using its name.
527 * \param name the name of a storage
528 * \return the corresponding storage
530 msg_storage_t MSG_storage_get_by_name(const char *name)
532 return static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,name));
535 /** \ingroup msg_storage_management
536 * \brief Returns a dynar containing all the storage elements declared at a given point of time
538 xbt_dynar_t MSG_storages_as_dynar() {
539 xbt_lib_cursor_t cursor;
542 xbt_dynar_t res = xbt_dynar_new(sizeof(msg_storage_t),nullptr);
544 xbt_lib_foreach(storage_lib, cursor, key, data) {
545 if(xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), MSG_STORAGE_LEVEL) != nullptr) {
546 xbt_dictelm_t elm = xbt_dict_cursor_get_elm(cursor);
547 xbt_dynar_push(res, &elm);
553 /** \ingroup msg_storage_management
555 * \brief Set the user data of a #msg_storage_t.
556 * This functions attach \a data to \a storage if possible.
558 msg_error_t MSG_storage_set_data(msg_storage_t storage, void *data)
560 msg_storage_priv_t priv = MSG_storage_priv(storage);
565 /** \ingroup m_host_management
567 * \brief Returns the user data of a #msg_storage_t.
569 * This functions checks whether \a storage is a valid pointer and returns its associate user data if possible.
571 void *MSG_storage_get_data(msg_storage_t storage)
573 xbt_assert((storage != nullptr), "Invalid parameters");
574 msg_storage_priv_t priv = MSG_storage_priv(storage);
578 /** \ingroup msg_storage_management
580 * \brief Returns the content (file list) of a #msg_storage_t.
581 * \param storage a storage
582 * \return The content of this storage element as a dict (full path file => size)
584 xbt_dict_t MSG_storage_get_content(msg_storage_t storage)
586 return SIMIX_storage_get_content(storage);
589 /** \ingroup msg_storage_management
591 * \brief Returns the size of a #msg_storage_t.
592 * \param storage a storage
593 * \return The size of the storage
595 sg_size_t MSG_storage_get_size(msg_storage_t storage)
597 return SIMIX_storage_get_size(storage);
600 /** \ingroup msg_storage_management
602 * \brief Returns the host name the storage is attached to
604 * This functions checks whether a storage is a valid pointer or not and return its name.
606 const char *MSG_storage_get_host(msg_storage_t storage) {
607 xbt_assert((storage != nullptr), "Invalid parameters");
608 msg_storage_priv_t priv = MSG_storage_priv(storage);
609 return priv->hostname;