1 /* Copyright (c) 2015-2020. 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/plugins/file_system.h"
7 #include "simgrid/s4u/Actor.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "src/surf/HostImpl.hpp"
10 #include "src/surf/xml/platf_private.hpp"
11 #include "xbt/config.hpp"
14 #include <boost/algorithm/string.hpp>
15 #include <boost/algorithm/string/join.hpp>
16 #include <boost/algorithm/string/split.hpp>
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_file, s4u, "S4U files");
21 int sg_storage_max_file_descriptors = 1024;
23 /** @defgroup plugin_filesystem Plugin FileSystem
25 * This adds the notion of Files on top of the storage notion that provided by the core of SimGrid.
26 * Activate this plugin at will.
31 template class xbt::Extendable<s4u::File>;
34 simgrid::xbt::Extension<Disk, FileSystemDiskExt> FileSystemDiskExt::EXTENSION_ID;
35 simgrid::xbt::Extension<Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
36 simgrid::xbt::Extension<Host, FileDescriptorHostExt> FileDescriptorHostExt::EXTENSION_ID;
38 Storage* File::find_local_storage_on(Host* host)
40 Storage* st = nullptr;
41 size_t longest_prefix_length = 0;
42 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
44 for (auto const& mnt : host->get_mounted_storages()) {
45 XBT_DEBUG("See '%s'", mnt.first.c_str());
46 mount_point_ = fullpath_.substr(0, mnt.first.length());
48 if (mount_point_ == mnt.first && mnt.first.length() > longest_prefix_length) {
49 /* The current mount name is found in the full path and is bigger than the previous*/
50 longest_prefix_length = mnt.first.length();
54 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
55 mount_point_ = fullpath_.substr(0, longest_prefix_length);
56 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
58 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
63 Disk* File::find_local_disk_on(const Host* host)
66 size_t longest_prefix_length = 0;
67 for (auto const& disk : host->get_disks()) {
68 std::string current_mount;
69 if (disk->get_host() != host)
70 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point(disk->get_host());
72 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
73 mount_point_ = fullpath_.substr(0, current_mount.length());
74 if (mount_point_ == current_mount && current_mount.length() > longest_prefix_length) {
75 /* The current mount name is found in the full path and is bigger than the previous*/
76 longest_prefix_length = current_mount.length();
79 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
80 mount_point_ = fullpath_.substr(0, longest_prefix_length);
81 if (mount_point_ == std::string("/"))
84 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
85 XBT_DEBUG("%s + %s", mount_point_.c_str(), path_.c_str());
87 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
92 File::File(const std::string& fullpath, void* userdata) : File(fullpath, Host::current(), userdata) {}
94 File::File(const std::string& fullpath, sg_host_t host, void* userdata) : fullpath_(fullpath)
96 kernel::actor::simcall([this, &host, userdata] {
97 this->set_data(userdata);
98 // this cannot fail because we get a xbt_die if the mountpoint does not exist
99 if (not host->get_mounted_storages().empty()) {
100 local_storage_ = find_local_storage_on(host);
102 if (not host->get_disks().empty()) {
103 local_disk_ = find_local_disk_on(host);
106 // assign a file descriptor id to the newly opened File
107 FileDescriptorHostExt* ext = host->extension<simgrid::s4u::FileDescriptorHostExt>();
108 if (ext->file_descriptor_table == nullptr) {
109 ext->file_descriptor_table.reset(new std::vector<int>(sg_storage_max_file_descriptors));
110 std::iota(ext->file_descriptor_table->rbegin(), ext->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
112 xbt_assert(not ext->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
113 desc_id = ext->file_descriptor_table->back();
114 ext->file_descriptor_table->pop_back();
116 XBT_DEBUG("\tOpen file '%s'", path_.c_str());
117 std::map<std::string, sg_size_t>* content = nullptr;
119 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
122 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
124 // if file does not exist create an empty file
126 auto sz = content->find(path_);
127 if (sz != content->end()) {
131 content->insert({path_, size_});
132 XBT_DEBUG("File '%s' was not found, file created.", path_.c_str());
140 std::vector<int>* desc_table =
141 Host::current()->extension<simgrid::s4u::FileDescriptorHostExt>()->file_descriptor_table.get();
142 kernel::actor::simcall([this, desc_table] { desc_table->push_back(this->desc_id); });
148 XBT_INFO("File Descriptor information:\n"
149 "\t\tFull path: '%s'\n"
151 "\t\tMount point: '%s'\n"
152 "\t\tStorage Id: '%s'\n"
153 "\t\tStorage Type: '%s'\n"
154 "\t\tFile Descriptor Id: %d",
155 get_path(), size_, mount_point_.c_str(), local_storage_->get_cname(), local_storage_->get_type(), desc_id);
157 XBT_INFO("File Descriptor information:\n"
158 "\t\tFull path: '%s'\n"
160 "\t\tMount point: '%s'\n"
161 "\t\tDisk Id: '%s'\n"
162 "\t\tHost Id: '%s'\n"
163 "\t\tFile Descriptor Id: %d",
164 get_path(), size_, mount_point_.c_str(), local_disk_->get_cname(), local_disk_->get_host()->get_cname(),
168 sg_size_t File::read(sg_size_t size)
170 if (size_ == 0) /* Nothing to read, return */
172 sg_size_t read_size = 0;
173 Host* host = nullptr;
174 if (local_storage_) {
175 /* Find the host where the file is physically located and read it */
176 host = local_storage_->get_host();
177 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
178 // if the current position is close to the end of the file, we may not be able to read the requested size
179 read_size = local_storage_->read(std::min(size, size_ - current_position_));
180 current_position_ += read_size;
184 /* Find the host where the file is physically located and read it */
185 host = local_disk_->get_host();
186 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
187 // if the current position is close to the end of the file, we may not be able to read the requested size
188 read_size = local_disk_->read(std::min(size, size_ - current_position_));
189 current_position_ += read_size;
192 if (host && host->get_name() != Host::current()->get_name() && read_size > 0) {
193 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
194 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), read_size);
195 host->sendto(Host::current(), read_size);
201 /** @brief Write into a file (local or remote)
202 * @ingroup plugin_filesystem
204 * @param size of the file to write
205 * @return the number of bytes successfully write or -1 if an error occurred
207 sg_size_t File::write_on_disk(sg_size_t size, bool write_inside)
209 sg_size_t write_size = 0;
210 /* Find the host where the file is physically located (remote or local)*/
211 Host* host = local_disk_->get_host();
213 if (host && host->get_name() != Host::current()->get_name()) {
214 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
215 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
216 Host::current()->sendto(host, size);
218 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_disk_->get_cname(), size, size_,
219 sg_disk_get_size_used(local_disk_), sg_disk_get_size(local_disk_));
220 // If the storage is full before even starting to write
221 if (sg_disk_get_size_used(local_disk_) >= sg_disk_get_size(local_disk_))
223 if (not write_inside) {
224 /* Subtract the part of the file that might disappear from the used sized on the storage element */
225 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_ - current_position_);
226 write_size = local_disk_->write(size);
227 local_disk_->extension<FileSystemDiskExt>()->incr_used_size(write_size);
228 current_position_ += write_size;
229 size_ = current_position_;
231 write_size = local_disk_->write(size);
232 current_position_ += write_size;
233 if (current_position_ > size_)
234 size_ = current_position_;
236 kernel::actor::simcall([this] {
237 std::map<std::string, sg_size_t>* content = local_disk_->extension<FileSystemDiskExt>()->get_content();
239 content->erase(path_);
240 content->insert({path_, size_});
246 sg_size_t File::write_on_storage(sg_size_t size, bool write_inside)
248 sg_size_t write_size = 0;
249 /* Find the host where the file is physically located (remote or local)*/
250 Host* host = local_storage_->get_host();
252 if (host && host->get_name() != Host::current()->get_name()) {
253 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
254 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
255 Host::current()->sendto(host, size);
258 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_storage_->get_cname(), size, size_,
259 sg_storage_get_size_used(local_storage_), sg_storage_get_size(local_storage_));
260 // If the storage is full before even starting to write
261 if (sg_storage_get_size_used(local_storage_) >= sg_storage_get_size(local_storage_))
263 if (not write_inside) {
264 /* Subtract the part of the file that might disappear from the used sized on the storage element */
265 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_ - current_position_);
266 write_size = local_storage_->write(size);
267 local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
268 current_position_ += write_size;
269 size_ = current_position_;
271 write_size = local_storage_->write(size);
272 current_position_ += write_size;
273 if (current_position_ > size_)
274 size_ = current_position_;
276 kernel::actor::simcall([this] {
277 std::map<std::string, sg_size_t>* content = local_storage_->extension<FileSystemStorageExt>()->get_content();
279 content->erase(path_);
280 content->insert({path_, size_});
286 sg_size_t File::write(sg_size_t size, bool write_inside)
288 if (size == 0) /* Nothing to write, return */
292 return write_on_disk(size, write_inside);
294 return write_on_storage(size, write_inside);
299 sg_size_t File::size()
304 void File::seek(sg_offset_t offset)
306 current_position_ = offset;
309 void File::seek(sg_offset_t offset, int origin)
313 current_position_ = offset;
316 current_position_ += offset;
319 current_position_ = size_ + offset;
326 sg_size_t File::tell()
328 return current_position_;
331 void File::move(const std::string& fullpath)
333 /* Check if the new full path is on the same mount point */
334 if (fullpath.compare(0, mount_point_.length(), mount_point_) == 0) {
335 std::map<std::string, sg_size_t>* content = nullptr;
337 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
339 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
341 auto sz = content->find(path_);
342 if (sz != content->end()) { // src file exists
343 sg_size_t new_size = sz->second;
344 content->erase(path_);
345 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
346 content->insert({path.c_str(), new_size});
347 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
349 XBT_WARN("File %s doesn't exist", path_.c_str());
353 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
359 /* Check if the file is on local storage */
360 std::map<std::string, sg_size_t>* content = nullptr;
361 const char* name = "";
362 if (local_storage_) {
363 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
364 name = local_storage_->get_cname();
367 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
368 name = local_disk_->get_cname();
371 if (not content || content->find(path_) == content->end()) {
372 XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), name);
375 XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), name);
378 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_);
381 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_);
383 // Remove the file from storage
384 content->erase(path_);
390 int File::remote_copy(sg_host_t host, const char* fullpath)
392 /* Find the host where the file is physically located and read it */
393 Host* src_host = nullptr;
394 if (local_storage_) {
395 src_host = local_storage_->get_host();
396 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
400 src_host = local_disk_->get_host();
401 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
405 // if the current position is close to the end of the file, we may not be able to read the requested size
406 sg_size_t read_size = 0;
408 read_size = local_storage_->read(size_);
410 read_size = local_disk_->read(size_);
412 current_position_ += read_size;
414 Host* dst_host = host;
415 size_t longest_prefix_length = 0;
416 if (local_storage_) {
417 /* Find the host that owns the storage where the file has to be copied */
418 const Storage* storage_dest = nullptr;
420 for (auto const& elm : host->get_mounted_storages()) {
421 std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
422 if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
423 /* The current mount name is found in the full path and is bigger than the previous*/
424 longest_prefix_length = elm.first.length();
425 storage_dest = elm.second;
429 if (storage_dest != nullptr) {
430 /* Mount point found, retrieve the host the storage is attached to */
431 dst_host = storage_dest->get_host();
433 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->get_cname());
439 const Disk* dst_disk = nullptr;
441 for (auto const& disk : host->get_disks()) {
442 std::string current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
443 std::string mount_point = std::string(fullpath).substr(0, current_mount.length());
444 if (mount_point == current_mount && current_mount.length() > longest_prefix_length) {
445 /* The current mount name is found in the full path and is bigger than the previous*/
446 longest_prefix_length = current_mount.length();
451 if (dst_disk == nullptr) {
452 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->get_cname());
458 XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->get_cname(),
459 dst_host->get_cname());
460 src_host->sendto(dst_host, read_size);
463 /* Create file on remote host, write it and close it */
464 File* fd = new File(fullpath, dst_host, nullptr);
465 if (local_storage_) {
466 sg_size_t write_size = fd->local_storage_->write(read_size);
467 fd->local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
468 (*(fd->local_storage_->extension<FileSystemStorageExt>()->get_content()))[path_] = size_;
471 fd->write(read_size);
476 int File::remote_move(sg_host_t host, const char* fullpath)
478 int res = remote_copy(host, fullpath);
483 FileSystemDiskExt::FileSystemDiskExt(const Disk* ptr)
485 const char* size_str = ptr->get_property("size");
487 size_ = surf_parse_get_size(size_str, "disk size", ptr->get_name());
489 const char* current_mount_str = ptr->get_property("mount");
490 if (current_mount_str)
491 mount_point_ = std::string(current_mount_str);
493 mount_point_ = std::string("/");
495 const char* content_str = ptr->get_property("content");
497 content_.reset(parse_content(content_str));
500 FileSystemStorageExt::FileSystemStorageExt(const Storage* ptr) : size_(ptr->get_impl()->size_)
502 content_.reset(parse_content(ptr->get_impl()->content_name_));
505 std::map<std::string, sg_size_t>* FileSystemDiskExt::parse_content(const std::string& filename)
507 if (filename.empty())
510 std::map<std::string, sg_size_t>* parse_content = new std::map<std::string, sg_size_t>();
512 std::ifstream* fs = surf_ifsopen(filename);
513 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
514 (boost::join(surf_path, ":")).c_str());
517 std::vector<std::string> tokens;
519 std::getline(*fs, line);
521 if (line.length() > 0) {
522 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
523 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
524 sg_size_t size = std::stoull(tokens.at(1));
527 parse_content->insert({tokens.front(), size});
529 } while (not fs->eof());
531 return parse_content;
534 std::map<std::string, sg_size_t>* FileSystemStorageExt::parse_content(const std::string& filename)
536 if (filename.empty())
539 std::map<std::string, sg_size_t>* parse_content = new std::map<std::string, sg_size_t>();
541 std::ifstream* fs = surf_ifsopen(filename);
542 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
543 (boost::join(surf_path, ":")).c_str());
546 std::vector<std::string> tokens;
548 std::getline(*fs, line);
550 if (line.length() > 0) {
551 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
552 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
553 sg_size_t size = std::stoull(tokens.at(1));
556 parse_content->insert({tokens.front(), size});
558 } while (not fs->eof());
560 return parse_content;
563 void FileSystemStorageExt::decr_used_size(sg_size_t size)
565 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
568 void FileSystemStorageExt::incr_used_size(sg_size_t size)
570 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
573 void FileSystemDiskExt::decr_used_size(sg_size_t size)
575 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
578 void FileSystemDiskExt::incr_used_size(sg_size_t size)
580 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
585 using simgrid::s4u::FileDescriptorHostExt;
586 using simgrid::s4u::FileSystemDiskExt;
587 using simgrid::s4u::FileSystemStorageExt;
589 static void on_disk_creation(simgrid::s4u::Disk& d)
591 d.extension_set(new FileSystemDiskExt(&d));
593 static void on_storage_creation(simgrid::s4u::Storage& st)
595 st.extension_set(new FileSystemStorageExt(&st));
598 static void on_host_creation(simgrid::s4u::Host& host)
600 host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
603 static void on_platform_created()
605 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
606 const char* remote_disk_str = host->get_property("remote_disk");
607 if (remote_disk_str) {
608 std::vector<std::string> tokens;
609 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
610 std::string mount_point = tokens[0];
611 simgrid::s4u::Host* remote_host = simgrid::s4u::Host::by_name_or_null(tokens[2]);
612 xbt_assert(remote_host, "You're trying to access a host that does not exist. Please check your platform file");
614 simgrid::s4u::Disk* disk = nullptr;
615 for (auto const& d : remote_host->get_disks())
616 if (d->get_name() == tokens[1]) {
621 xbt_assert(disk, "You're trying to mount a disk that does not exist. Please check your platform file");
622 disk->extension<FileSystemDiskExt>()->add_remote_mount(remote_host, mount_point);
623 host->add_disk(disk);
625 XBT_DEBUG("Host '%s' wants to mount a remote disk: %s of %s mounted on %s", host->get_cname(), disk->get_cname(),
626 remote_host->get_cname(), mount_point.c_str());
627 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
632 static void on_simulation_end()
634 XBT_DEBUG("Simulation is over, time to unregister remote disks if any");
635 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
636 const char* remote_disk_str = host->get_property("remote_disk");
637 if (remote_disk_str) {
638 std::vector<std::string> tokens;
639 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
640 XBT_DEBUG("Host '%s' wants to unmount a remote disk: %s of %s mounted on %s", host->get_cname(),
641 tokens[1].c_str(), tokens[2].c_str(), tokens[0].c_str());
642 host->remove_disk(tokens[1]);
643 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
648 /* **************************** Public interface *************************** */
649 /** @brief Initialize the file system plugin.
650 @ingroup plugin_filesystem
653 See the examples in :ref:`s4u_ex_disk_io`.
656 void sg_storage_file_system_init()
658 sg_storage_max_file_descriptors = 1024;
659 simgrid::config::bind_flag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
660 "Maximum number of concurrently opened files per host. Default is 1024");
662 if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
663 FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
664 simgrid::s4u::Storage::on_creation.connect(&on_storage_creation);
667 if (not FileSystemDiskExt::EXTENSION_ID.valid()) {
668 FileSystemDiskExt::EXTENSION_ID = simgrid::s4u::Disk::extension_create<FileSystemDiskExt>();
669 simgrid::s4u::Disk::on_creation.connect(&on_disk_creation);
672 if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
673 FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
674 simgrid::s4u::Host::on_creation.connect(&on_host_creation);
676 simgrid::s4u::Engine::on_platform_created.connect(&on_platform_created);
677 simgrid::s4u::Engine::on_simulation_end.connect(&on_simulation_end);
680 sg_file_t sg_file_open(const char* fullpath, void* data)
682 return new simgrid::s4u::File(fullpath, data);
685 sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
687 return fd->read(size);
690 sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
692 return fd->write(size);
695 void sg_file_close(const_sg_file_t fd)
700 /** Retrieves the path to the file
701 * @ingroup plugin_filesystem
703 const char* sg_file_get_name(sg_file_t fd)
705 xbt_assert((fd != nullptr), "Invalid file descriptor");
706 return fd->get_path();
709 /** Retrieves the size of the file
710 * @ingroup plugin_filesystem
712 sg_size_t sg_file_get_size(sg_file_t fd)
717 void sg_file_dump(sg_file_t fd)
722 /** Retrieves the user data associated with the file
723 * @ingroup plugin_filesystem
725 void* sg_file_get_data(const_sg_file_t fd)
727 return fd->get_data();
730 /** Changes the user data associated with the file
731 * @ingroup plugin_filesystem
733 void sg_file_set_data(sg_file_t fd, void* data)
739 * @brief Set the file position indicator in the sg_file_t by adding offset bytes to the position specified by origin (either SEEK_SET, SEEK_CUR, or SEEK_END).
740 * @ingroup plugin_filesystem
742 * @param fd : file object that identifies the stream
743 * @param offset : number of bytes to offset from origin
744 * @param origin : Position used as reference for the offset. It is specified by one of the following constants defined
745 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
746 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
748 void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
750 fd->seek(offset, origin);
753 sg_size_t sg_file_tell(sg_file_t fd)
758 void sg_file_move(sg_file_t fd, const char* fullpath)
763 void sg_file_unlink(sg_file_t fd)
770 * @brief Copy a file to another location on a remote host.
771 * @ingroup plugin_filesystem
773 * @param file : the file to move
774 * @param host : the remote host where the file has to be copied
775 * @param fullpath : the complete path destination on the remote host
776 * @return If successful, the function returns 0. Otherwise, it returns -1.
778 int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
780 return file->remote_copy(host, fullpath);
784 * @brief Move a file to another location on a remote host.
785 * @ingroup plugin_filesystem
787 * @param file : the file to move
788 * @param host : the remote host where the file has to be moved
789 * @param fullpath : the complete path destination on the remote host
790 * @return If successful, the function returns 0. Otherwise, it returns -1.
792 int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
794 return file->remote_move(host, fullpath);
797 sg_size_t sg_disk_get_size_free(const_sg_disk_t d)
799 return d->extension<FileSystemDiskExt>()->get_size() - d->extension<FileSystemDiskExt>()->get_used_size();
802 sg_size_t sg_disk_get_size_used(const_sg_disk_t d)
804 return d->extension<FileSystemDiskExt>()->get_used_size();
807 sg_size_t sg_disk_get_size(const_sg_disk_t d)
809 return d->extension<FileSystemDiskExt>()->get_size();
812 const char* sg_disk_get_mount_point(const_sg_disk_t d)
814 return d->extension<FileSystemDiskExt>()->get_mount_point();
817 sg_size_t sg_storage_get_size_free(const_sg_storage_t st)
819 return st->extension<FileSystemStorageExt>()->get_size() - st->extension<FileSystemStorageExt>()->get_used_size();
822 sg_size_t sg_storage_get_size_used(const_sg_storage_t st)
824 return st->extension<FileSystemStorageExt>()->get_used_size();
827 sg_size_t sg_storage_get_size(const_sg_storage_t st)
829 return st->extension<FileSystemStorageExt>()->get_size();
832 xbt_dict_t sg_storage_get_content(const_sg_storage_t storage)
834 const std::map<std::string, sg_size_t>* content =
835 storage->extension<simgrid::s4u::FileSystemStorageExt>()->get_content();
836 // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
837 xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
839 for (auto const& entry : *content) {
840 sg_size_t* psize = new sg_size_t;
841 *psize = entry.second;
842 xbt_dict_set(content_as_dict, entry.first.c_str(), psize);
844 return content_as_dict;
847 xbt_dict_t sg_host_get_storage_content(sg_host_t host)
849 xbt_assert((host != nullptr), "Invalid parameters");
850 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
851 for (auto const& elm : host->get_mounted_storages())
852 xbt_dict_set(contents, elm.first.c_str(), sg_storage_get_content(elm.second));