1 /* Copyright (c) 2015-2021. 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"
12 #include "xbt/parse_units.hpp"
15 #include <boost/algorithm/string.hpp>
16 #include <boost/algorithm/string/join.hpp>
17 #include <boost/algorithm/string/split.hpp>
22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_file, s4u, "S4U files");
23 int sg_storage_max_file_descriptors = 1024;
25 /** @defgroup plugin_filesystem Plugin FileSystem
27 * This adds the notion of Files on top of the storage notion that provided by the core of SimGrid.
28 * Activate this plugin at will.
33 template class xbt::Extendable<s4u::File>;
36 simgrid::xbt::Extension<Disk, FileSystemDiskExt> FileSystemDiskExt::EXTENSION_ID;
37 simgrid::xbt::Extension<Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
38 simgrid::xbt::Extension<Host, FileDescriptorHostExt> FileDescriptorHostExt::EXTENSION_ID;
40 Storage* File::find_local_storage_on(Host* host)
42 Storage* st = nullptr;
43 size_t longest_prefix_length = 0;
44 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
46 for (auto const& mnt : host->get_mounted_storages()) {
47 XBT_DEBUG("See '%s'", mnt.first.c_str());
48 mount_point_ = fullpath_.substr(0, mnt.first.length());
50 if (mount_point_ == mnt.first && mnt.first.length() > longest_prefix_length) {
51 /* The current mount name is found in the full path and is bigger than the previous*/
52 longest_prefix_length = mnt.first.length();
56 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
57 mount_point_ = fullpath_.substr(0, longest_prefix_length);
58 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
60 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
65 Disk* File::find_local_disk_on(const Host* host)
68 size_t longest_prefix_length = 0;
69 for (auto const& disk : host->get_disks()) {
70 std::string current_mount;
71 if (disk->get_host() != host)
72 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point(disk->get_host());
74 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
75 mount_point_ = fullpath_.substr(0, current_mount.length());
76 if (mount_point_ == current_mount && current_mount.length() > longest_prefix_length) {
77 /* The current mount name is found in the full path and is bigger than the previous*/
78 longest_prefix_length = current_mount.length();
81 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
82 mount_point_ = fullpath_.substr(0, longest_prefix_length);
83 if (mount_point_ == std::string("/"))
86 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
87 XBT_DEBUG("%s + %s", mount_point_.c_str(), path_.c_str());
89 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
94 File::File(const std::string& fullpath, void* userdata) : File(fullpath, Host::current(), userdata) {}
96 File::File(const std::string& fullpath, sg_host_t host, void* userdata) : fullpath_(fullpath)
98 kernel::actor::simcall([this, &host, userdata] {
99 this->set_data(userdata);
100 // this cannot fail because we get a xbt_die if the mountpoint does not exist
101 if (not host->get_mounted_storages().empty()) {
102 local_storage_ = find_local_storage_on(host);
104 if (not host->get_disks().empty()) {
105 local_disk_ = find_local_disk_on(host);
108 // assign a file descriptor id to the newly opened File
109 auto* ext = host->extension<simgrid::s4u::FileDescriptorHostExt>();
110 if (ext->file_descriptor_table == nullptr) {
111 ext->file_descriptor_table = std::make_unique<std::vector<int>>(sg_storage_max_file_descriptors);
112 std::iota(ext->file_descriptor_table->rbegin(), ext->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
114 xbt_assert(not ext->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
115 desc_id = ext->file_descriptor_table->back();
116 ext->file_descriptor_table->pop_back();
118 XBT_DEBUG("\tOpen file '%s'", path_.c_str());
119 std::map<std::string, sg_size_t, std::less<>>* content = nullptr;
121 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
124 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
126 // if file does not exist create an empty file
128 auto sz = content->find(path_);
129 if (sz != content->end()) {
133 content->insert({path_, size_});
134 XBT_DEBUG("File '%s' was not found, file created.", path_.c_str());
142 std::vector<int>* desc_table =
143 Host::current()->extension<simgrid::s4u::FileDescriptorHostExt>()->file_descriptor_table.get();
144 kernel::actor::simcall([this, desc_table] { desc_table->push_back(this->desc_id); });
147 void File::dump() const
150 XBT_INFO("File Descriptor information:\n"
151 "\t\tFull path: '%s'\n"
153 "\t\tMount point: '%s'\n"
154 "\t\tStorage Id: '%s'\n"
155 "\t\tStorage Type: '%s'\n"
156 "\t\tFile Descriptor Id: %d",
157 get_path(), size_, mount_point_.c_str(), local_storage_->get_cname(), local_storage_->get_type(), desc_id);
159 XBT_INFO("File Descriptor information:\n"
160 "\t\tFull path: '%s'\n"
162 "\t\tMount point: '%s'\n"
163 "\t\tDisk Id: '%s'\n"
164 "\t\tHost Id: '%s'\n"
165 "\t\tFile Descriptor Id: %d",
166 get_path(), size_, mount_point_.c_str(), local_disk_->get_cname(), local_disk_->get_host()->get_cname(),
170 sg_size_t File::read(sg_size_t size)
172 if (size_ == 0) /* Nothing to read, return */
174 Host* host = nullptr;
175 // if the current position is close to the end of the file, we may not be able to read the requested size
176 sg_size_t to_read = std::min(size, size_ - current_position_);
177 sg_size_t read_size = 0;
179 if (local_storage_) {
180 /* Find the host where the file is physically located and read it */
181 host = local_storage_->get_host();
182 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
183 read_size = local_storage_->read(to_read);
187 /* Find the host where the file is physically located and read it */
188 host = local_disk_->get_host();
189 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
190 read_size = local_disk_->read(to_read);
193 current_position_ += read_size;
195 if (host && host->get_name() != Host::current()->get_name() && read_size > 0) {
196 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
197 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), read_size);
198 host->sendto(Host::current(), read_size);
204 /** @brief Write into a file (local or remote)
205 * @ingroup plugin_filesystem
207 * @param size of the file to write
208 * @return the number of bytes successfully write or -1 if an error occurred
210 sg_size_t File::write_on_disk(sg_size_t size, bool write_inside)
212 sg_size_t write_size = 0;
213 /* Find the host where the file is physically located (remote or local)*/
214 Host* host = local_disk_->get_host();
216 if (host && host->get_name() != Host::current()->get_name()) {
217 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
218 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
219 Host::current()->sendto(host, size);
221 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_disk_->get_cname(), size, size_,
222 sg_disk_get_size_used(local_disk_), sg_disk_get_size(local_disk_));
223 // If the storage is full before even starting to write
224 if (sg_disk_get_size_used(local_disk_) >= sg_disk_get_size(local_disk_))
226 if (not write_inside) {
227 /* Subtract the part of the file that might disappear from the used sized on the storage element */
228 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_ - current_position_);
229 write_size = local_disk_->write(size);
230 local_disk_->extension<FileSystemDiskExt>()->incr_used_size(write_size);
231 current_position_ += write_size;
232 size_ = current_position_;
234 write_size = local_disk_->write(size);
235 current_position_ += write_size;
236 if (current_position_ > size_)
237 size_ = current_position_;
239 kernel::actor::simcall([this] {
240 std::map<std::string, sg_size_t, std::less<>>* content = local_disk_->extension<FileSystemDiskExt>()->get_content();
242 content->erase(path_);
243 content->insert({path_, size_});
249 sg_size_t File::write_on_storage(sg_size_t size, bool write_inside)
251 sg_size_t write_size = 0;
252 /* Find the host where the file is physically located (remote or local)*/
253 Host* host = local_storage_->get_host();
255 if (host && host->get_name() != Host::current()->get_name()) {
256 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
257 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
258 Host::current()->sendto(host, size);
261 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_storage_->get_cname(), size, size_,
262 sg_storage_get_size_used(local_storage_), sg_storage_get_size(local_storage_));
263 // If the storage is full before even starting to write
264 if (sg_storage_get_size_used(local_storage_) >= sg_storage_get_size(local_storage_))
266 if (not write_inside) {
267 /* Subtract the part of the file that might disappear from the used sized on the storage element */
268 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_ - current_position_);
269 write_size = local_storage_->write(size);
270 local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
271 current_position_ += write_size;
272 size_ = current_position_;
274 write_size = local_storage_->write(size);
275 current_position_ += write_size;
276 if (current_position_ > size_)
277 size_ = current_position_;
279 kernel::actor::simcall([this] {
280 std::map<std::string, sg_size_t, std::less<>>* content =
281 local_storage_->extension<FileSystemStorageExt>()->get_content();
283 content->erase(path_);
284 content->insert({path_, size_});
290 sg_size_t File::write(sg_size_t size, bool write_inside)
292 if (size == 0) /* Nothing to write, return */
296 return write_on_disk(size, write_inside);
298 return write_on_storage(size, write_inside);
303 sg_size_t File::size() const
308 void File::seek(sg_offset_t offset)
310 current_position_ = offset;
313 void File::seek(sg_offset_t offset, int origin)
317 current_position_ = offset;
320 current_position_ += offset;
323 current_position_ = size_ + offset;
330 sg_size_t File::tell() const
332 return current_position_;
335 void File::move(const std::string& fullpath) const
337 /* Check if the new full path is on the same mount point */
338 if (fullpath.compare(0, mount_point_.length(), mount_point_) == 0) {
339 std::map<std::string, sg_size_t, std::less<>>* content = nullptr;
341 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
343 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
345 auto sz = content->find(path_);
346 if (sz != content->end()) { // src file exists
347 sg_size_t new_size = sz->second;
348 content->erase(path_);
349 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
350 content->insert({path.c_str(), new_size});
351 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
353 XBT_WARN("File %s doesn't exist", path_.c_str());
357 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
361 int File::unlink() const
363 /* Check if the file is on local storage */
364 std::map<std::string, sg_size_t, std::less<>>* content = nullptr;
365 const char* name = "";
366 if (local_storage_) {
367 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
368 name = local_storage_->get_cname();
371 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
372 name = local_disk_->get_cname();
375 if (not content || content->find(path_) == content->end()) {
376 XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), name);
379 XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), name);
382 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_);
385 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_);
387 // Remove the file from storage
388 content->erase(path_);
394 int File::remote_copy(sg_host_t host, const std::string& fullpath)
396 /* Find the host where the file is physically located and read it */
397 Host* src_host = nullptr;
398 sg_size_t read_size = 0;
400 Host* dst_host = host;
401 size_t longest_prefix_length = 0;
405 if (local_storage_) {
406 src_host = local_storage_->get_host();
407 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
408 read_size = local_storage_->read(size_);
409 current_position_ += read_size;
411 /* Find the host that owns the storage where the file has to be copied */
412 const Storage* storage_dest = nullptr;
414 for (auto const& elm : host->get_mounted_storages()) {
415 std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
416 if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
417 /* The current mount name is found in the full path and is bigger than the previous*/
418 longest_prefix_length = elm.first.length();
419 storage_dest = elm.second;
423 if (storage_dest != nullptr) {
424 /* Mount point found, retrieve the host the storage is attached to */
425 dst_host = storage_dest->get_host();
427 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath.c_str(), host->get_cname());
433 src_host = local_disk_->get_host();
434 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
435 read_size = local_disk_->read(size_);
436 current_position_ += read_size;
438 const Disk* dst_disk = nullptr;
440 for (auto const& disk : host->get_disks()) {
441 std::string current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
442 std::string mount_point = std::string(fullpath).substr(0, current_mount.length());
443 if (mount_point == current_mount && current_mount.length() > longest_prefix_length) {
444 /* The current mount name is found in the full path and is bigger than the previous*/
445 longest_prefix_length = current_mount.length();
450 if (dst_disk == nullptr) {
451 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath.c_str(), host->get_cname());
457 XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->get_cname(),
458 dst_host->get_cname());
459 src_host->sendto(dst_host, read_size);
462 /* Create file on remote host, write it and close it */
463 File fd(fullpath, dst_host, nullptr);
464 if (local_storage_) {
465 sg_size_t write_size = fd.local_storage_->write(read_size);
466 fd.local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
467 (*(fd.local_storage_->extension<FileSystemStorageExt>()->get_content()))[path_] = size_;
474 int File::remote_move(sg_host_t host, const std::string& fullpath)
476 int res = remote_copy(host, fullpath);
481 FileSystemDiskExt::FileSystemDiskExt(const Disk* ptr)
483 const char* size_str = ptr->get_property("size");
484 std::string dummyfile;
486 size_ = surf_parse_get_size(dummyfile, -1, size_str, "disk size", ptr->get_name());
488 const char* current_mount_str = ptr->get_property("mount");
489 if (current_mount_str)
490 mount_point_ = std::string(current_mount_str);
492 mount_point_ = std::string("/");
494 const char* content_str = ptr->get_property("content");
496 content_.reset(parse_content(content_str));
499 FileSystemStorageExt::FileSystemStorageExt(const Storage* ptr) : size_(ptr->get_impl()->size_)
501 content_.reset(parse_content(ptr->get_impl()->content_name_));
504 std::map<std::string, sg_size_t, std::less<>>* FileSystemDiskExt::parse_content(const std::string& filename)
506 if (filename.empty())
509 auto* parse_content = new std::map<std::string, sg_size_t, std::less<>>();
511 auto fs = std::unique_ptr<std::ifstream>(surf_ifsopen(filename));
512 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
513 (boost::join(surf_path, ":")).c_str());
516 std::vector<std::string> tokens;
518 std::getline(*fs, line);
520 if (line.length() > 0) {
521 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
522 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
523 sg_size_t size = std::stoull(tokens.at(1));
526 parse_content->insert({tokens.front(), size});
528 } while (not fs->eof());
529 return parse_content;
532 std::map<std::string, sg_size_t, std::less<>>* FileSystemStorageExt::parse_content(const std::string& filename)
534 if (filename.empty())
537 auto* parse_content = new std::map<std::string, sg_size_t, std::less<>>();
539 auto fs = std::unique_ptr<std::ifstream>(surf_ifsopen(filename));
540 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
541 (boost::join(surf_path, ":")).c_str());
544 std::vector<std::string> tokens;
546 std::getline(*fs, line);
548 if (line.length() > 0) {
549 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
550 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
551 sg_size_t size = std::stoull(tokens.at(1));
554 parse_content->insert({tokens.front(), size});
556 } while (not fs->eof());
557 return parse_content;
560 void FileSystemStorageExt::decr_used_size(sg_size_t size)
562 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
565 void FileSystemStorageExt::incr_used_size(sg_size_t size)
567 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
570 void FileSystemDiskExt::decr_used_size(sg_size_t size)
572 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
575 void FileSystemDiskExt::incr_used_size(sg_size_t size)
577 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
582 using simgrid::s4u::FileDescriptorHostExt;
583 using simgrid::s4u::FileSystemDiskExt;
584 using simgrid::s4u::FileSystemStorageExt;
586 static void on_disk_creation(simgrid::s4u::Disk& d)
588 d.extension_set(new FileSystemDiskExt(&d));
590 static void on_storage_creation(simgrid::s4u::Storage& st)
592 st.extension_set(new FileSystemStorageExt(&st));
595 static void on_host_creation(simgrid::s4u::Host& host)
597 host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
600 static void on_platform_created()
602 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
603 const char* remote_disk_str = host->get_property("remote_disk");
604 if (remote_disk_str) {
605 std::vector<std::string> tokens;
606 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
607 std::string mount_point = tokens[0];
608 simgrid::s4u::Host* remote_host = simgrid::s4u::Host::by_name_or_null(tokens[2]);
609 xbt_assert(remote_host, "You're trying to access a host that does not exist. Please check your platform file");
611 const simgrid::s4u::Disk* disk = nullptr;
612 for (auto const& d : remote_host->get_disks())
613 if (d->get_name() == tokens[1]) {
618 xbt_assert(disk, "You're trying to mount a disk that does not exist. Please check your platform file");
619 disk->extension<FileSystemDiskExt>()->add_remote_mount(remote_host, mount_point);
620 host->add_disk(disk);
622 XBT_DEBUG("Host '%s' wants to mount a remote disk: %s of %s mounted on %s", host->get_cname(), disk->get_cname(),
623 remote_host->get_cname(), mount_point.c_str());
624 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
629 static void on_simulation_end()
631 XBT_DEBUG("Simulation is over, time to unregister remote disks if any");
632 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
633 const char* remote_disk_str = host->get_property("remote_disk");
634 if (remote_disk_str) {
635 std::vector<std::string> tokens;
636 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
637 XBT_DEBUG("Host '%s' wants to unmount a remote disk: %s of %s mounted on %s", host->get_cname(),
638 tokens[1].c_str(), tokens[2].c_str(), tokens[0].c_str());
639 host->remove_disk(tokens[1]);
640 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
645 /* **************************** Public interface *************************** */
646 /** @brief Initialize the file system plugin.
647 @ingroup plugin_filesystem
650 See the examples in :ref:`s4u_ex_disk_io`.
653 void sg_storage_file_system_init()
655 sg_storage_max_file_descriptors = 1024;
656 simgrid::config::bind_flag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
657 "Maximum number of concurrently opened files per host. Default is 1024");
659 if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
660 FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
661 simgrid::s4u::Storage::on_creation.connect(&on_storage_creation);
664 if (not FileSystemDiskExt::EXTENSION_ID.valid()) {
665 FileSystemDiskExt::EXTENSION_ID = simgrid::s4u::Disk::extension_create<FileSystemDiskExt>();
666 simgrid::s4u::Disk::on_creation.connect(&on_disk_creation);
669 if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
670 FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
671 simgrid::s4u::Host::on_creation.connect(&on_host_creation);
673 simgrid::s4u::Engine::on_platform_created.connect(&on_platform_created);
674 simgrid::s4u::Engine::on_simulation_end.connect(&on_simulation_end);
677 sg_file_t sg_file_open(const char* fullpath, void* data)
679 return new simgrid::s4u::File(fullpath, data);
682 sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
684 return fd->read(size);
687 sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
689 return fd->write(size);
692 void sg_file_close(const_sg_file_t fd)
697 /** Retrieves the path to the file
698 * @ingroup plugin_filesystem
700 const char* sg_file_get_name(const_sg_file_t fd)
702 xbt_assert((fd != nullptr), "Invalid file descriptor");
703 return fd->get_path();
706 /** Retrieves the size of the file
707 * @ingroup plugin_filesystem
709 sg_size_t sg_file_get_size(const_sg_file_t fd)
714 void sg_file_dump(const_sg_file_t fd)
719 /** Retrieves the user data associated with the file
720 * @ingroup plugin_filesystem
722 void* sg_file_get_data(const_sg_file_t fd)
724 return fd->get_data();
727 /** Changes the user data associated with the file
728 * @ingroup plugin_filesystem
730 void sg_file_set_data(sg_file_t fd, void* data)
736 * @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).
737 * @ingroup plugin_filesystem
739 * @param fd : file object that identifies the stream
740 * @param offset : number of bytes to offset from origin
741 * @param origin : Position used as reference for the offset. It is specified by one of the following constants defined
742 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
743 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
745 void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
747 fd->seek(offset, origin);
750 sg_size_t sg_file_tell(const_sg_file_t fd)
755 void sg_file_move(const_sg_file_t fd, const char* fullpath)
760 void sg_file_unlink(sg_file_t fd)
767 * @brief Copy a file to another location on a remote host.
768 * @ingroup plugin_filesystem
770 * @param file : the file to move
771 * @param host : the remote host where the file has to be copied
772 * @param fullpath : the complete path destination on the remote host
773 * @return If successful, the function returns 0. Otherwise, it returns -1.
775 int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
777 return file->remote_copy(host, fullpath);
781 * @brief Move a file to another location on a remote host.
782 * @ingroup plugin_filesystem
784 * @param file : the file to move
785 * @param host : the remote host where the file has to be moved
786 * @param fullpath : the complete path destination on the remote host
787 * @return If successful, the function returns 0. Otherwise, it returns -1.
789 int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
791 return file->remote_move(host, fullpath);
794 sg_size_t sg_disk_get_size_free(const_sg_disk_t d)
796 return d->extension<FileSystemDiskExt>()->get_size() - d->extension<FileSystemDiskExt>()->get_used_size();
799 sg_size_t sg_disk_get_size_used(const_sg_disk_t d)
801 return d->extension<FileSystemDiskExt>()->get_used_size();
804 sg_size_t sg_disk_get_size(const_sg_disk_t d)
806 return d->extension<FileSystemDiskExt>()->get_size();
809 const char* sg_disk_get_mount_point(const_sg_disk_t d)
811 return d->extension<FileSystemDiskExt>()->get_mount_point();
814 sg_size_t sg_storage_get_size_free(const_sg_storage_t st)
816 return st->extension<FileSystemStorageExt>()->get_size() - st->extension<FileSystemStorageExt>()->get_used_size();
819 sg_size_t sg_storage_get_size_used(const_sg_storage_t st)
821 return st->extension<FileSystemStorageExt>()->get_used_size();
824 sg_size_t sg_storage_get_size(const_sg_storage_t st)
826 return st->extension<FileSystemStorageExt>()->get_size();
829 xbt_dict_t sg_storage_get_content(const_sg_storage_t storage)
831 const std::map<std::string, sg_size_t, std::less<>>* content =
832 storage->extension<simgrid::s4u::FileSystemStorageExt>()->get_content();
833 // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
834 xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
836 for (auto const& entry : *content) {
837 auto* psize = new sg_size_t(entry.second);
838 xbt_dict_set(content_as_dict, entry.first.c_str(), psize);
840 return content_as_dict;
843 xbt_dict_t sg_host_get_storage_content(sg_host_t host)
845 xbt_assert((host != nullptr), "Invalid parameters");
846 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
847 for (auto const& elm : host->get_mounted_storages())
848 xbt_dict_set(contents, elm.first.c_str(), sg_storage_get_content(elm.second));