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"
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>* 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 sg_size_t read_size = 0;
175 Host* host = nullptr;
176 if (local_storage_) {
177 /* Find the host where the file is physically located and read it */
178 host = local_storage_->get_host();
179 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
180 // if the current position is close to the end of the file, we may not be able to read the requested size
181 read_size = local_storage_->read(std::min(size, size_ - current_position_));
182 current_position_ += read_size;
186 /* Find the host where the file is physically located and read it */
187 host = local_disk_->get_host();
188 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
189 // if the current position is close to the end of the file, we may not be able to read the requested size
190 read_size = local_disk_->read(std::min(size, size_ - current_position_));
191 current_position_ += read_size;
194 if (host && host->get_name() != Host::current()->get_name() && read_size > 0) {
195 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
196 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), read_size);
197 host->sendto(Host::current(), read_size);
203 /** @brief Write into a file (local or remote)
204 * @ingroup plugin_filesystem
206 * @param size of the file to write
207 * @return the number of bytes successfully write or -1 if an error occurred
209 sg_size_t File::write_on_disk(sg_size_t size, bool write_inside)
211 sg_size_t write_size = 0;
212 /* Find the host where the file is physically located (remote or local)*/
213 Host* host = local_disk_->get_host();
215 if (host && host->get_name() != Host::current()->get_name()) {
216 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
217 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
218 Host::current()->sendto(host, size);
220 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_disk_->get_cname(), size, size_,
221 sg_disk_get_size_used(local_disk_), sg_disk_get_size(local_disk_));
222 // If the storage is full before even starting to write
223 if (sg_disk_get_size_used(local_disk_) >= sg_disk_get_size(local_disk_))
225 if (not write_inside) {
226 /* Subtract the part of the file that might disappear from the used sized on the storage element */
227 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_ - current_position_);
228 write_size = local_disk_->write(size);
229 local_disk_->extension<FileSystemDiskExt>()->incr_used_size(write_size);
230 current_position_ += write_size;
231 size_ = current_position_;
233 write_size = local_disk_->write(size);
234 current_position_ += write_size;
235 if (current_position_ > size_)
236 size_ = current_position_;
238 kernel::actor::simcall([this] {
239 std::map<std::string, sg_size_t>* content = local_disk_->extension<FileSystemDiskExt>()->get_content();
241 content->erase(path_);
242 content->insert({path_, size_});
248 sg_size_t File::write_on_storage(sg_size_t size, bool write_inside)
250 sg_size_t write_size = 0;
251 /* Find the host where the file is physically located (remote or local)*/
252 Host* host = local_storage_->get_host();
254 if (host && host->get_name() != Host::current()->get_name()) {
255 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
256 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
257 Host::current()->sendto(host, size);
260 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_storage_->get_cname(), size, size_,
261 sg_storage_get_size_used(local_storage_), sg_storage_get_size(local_storage_));
262 // If the storage is full before even starting to write
263 if (sg_storage_get_size_used(local_storage_) >= sg_storage_get_size(local_storage_))
265 if (not write_inside) {
266 /* Subtract the part of the file that might disappear from the used sized on the storage element */
267 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_ - current_position_);
268 write_size = local_storage_->write(size);
269 local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
270 current_position_ += write_size;
271 size_ = current_position_;
273 write_size = local_storage_->write(size);
274 current_position_ += write_size;
275 if (current_position_ > size_)
276 size_ = current_position_;
278 kernel::actor::simcall([this] {
279 std::map<std::string, sg_size_t>* content = local_storage_->extension<FileSystemStorageExt>()->get_content();
281 content->erase(path_);
282 content->insert({path_, size_});
288 sg_size_t File::write(sg_size_t size, bool write_inside)
290 if (size == 0) /* Nothing to write, return */
294 return write_on_disk(size, write_inside);
296 return write_on_storage(size, write_inside);
301 sg_size_t File::size() const
306 void File::seek(sg_offset_t offset)
308 current_position_ = offset;
311 void File::seek(sg_offset_t offset, int origin)
315 current_position_ = offset;
318 current_position_ += offset;
321 current_position_ = size_ + offset;
328 sg_size_t File::tell() const
330 return current_position_;
333 void File::move(const std::string& fullpath) const
335 /* Check if the new full path is on the same mount point */
336 if (fullpath.compare(0, mount_point_.length(), mount_point_) == 0) {
337 std::map<std::string, sg_size_t>* content = nullptr;
339 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
341 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
343 auto sz = content->find(path_);
344 if (sz != content->end()) { // src file exists
345 sg_size_t new_size = sz->second;
346 content->erase(path_);
347 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
348 content->insert({path.c_str(), new_size});
349 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
351 XBT_WARN("File %s doesn't exist", path_.c_str());
355 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
359 int File::unlink() const
361 /* Check if the file is on local storage */
362 std::map<std::string, sg_size_t>* content = nullptr;
363 const char* name = "";
364 if (local_storage_) {
365 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
366 name = local_storage_->get_cname();
369 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
370 name = local_disk_->get_cname();
373 if (not content || content->find(path_) == content->end()) {
374 XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), name);
377 XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), name);
380 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_);
383 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_);
385 // Remove the file from storage
386 content->erase(path_);
392 int File::remote_copy(sg_host_t host, const std::string& fullpath)
394 /* Find the host where the file is physically located and read it */
395 Host* src_host = nullptr;
396 if (local_storage_) {
397 src_host = local_storage_->get_host();
398 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
402 src_host = local_disk_->get_host();
403 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
407 // if the current position is close to the end of the file, we may not be able to read the requested size
408 sg_size_t read_size = 0;
410 read_size = local_storage_->read(size_);
412 read_size = local_disk_->read(size_);
414 current_position_ += read_size;
416 Host* dst_host = host;
417 size_t longest_prefix_length = 0;
418 if (local_storage_) {
419 /* Find the host that owns the storage where the file has to be copied */
420 const Storage* storage_dest = nullptr;
422 for (auto const& elm : host->get_mounted_storages()) {
423 std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
424 if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
425 /* The current mount name is found in the full path and is bigger than the previous*/
426 longest_prefix_length = elm.first.length();
427 storage_dest = elm.second;
431 if (storage_dest != nullptr) {
432 /* Mount point found, retrieve the host the storage is attached to */
433 dst_host = storage_dest->get_host();
435 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath.c_str(), host->get_cname());
441 const Disk* dst_disk = nullptr;
443 for (auto const& disk : host->get_disks()) {
444 std::string current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
445 std::string mount_point = std::string(fullpath).substr(0, current_mount.length());
446 if (mount_point == current_mount && current_mount.length() > longest_prefix_length) {
447 /* The current mount name is found in the full path and is bigger than the previous*/
448 longest_prefix_length = current_mount.length();
453 if (dst_disk == nullptr) {
454 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath.c_str(), host->get_cname());
460 XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->get_cname(),
461 dst_host->get_cname());
462 src_host->sendto(dst_host, read_size);
465 /* Create file on remote host, write it and close it */
466 auto* fd = new File(fullpath, dst_host, nullptr);
467 if (local_storage_) {
468 sg_size_t write_size = fd->local_storage_->write(read_size);
469 fd->local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
470 (*(fd->local_storage_->extension<FileSystemStorageExt>()->get_content()))[path_] = size_;
473 fd->write(read_size);
478 int File::remote_move(sg_host_t host, const std::string& fullpath)
480 int res = remote_copy(host, fullpath);
485 FileSystemDiskExt::FileSystemDiskExt(const Disk* ptr)
487 const char* size_str = ptr->get_property("size");
488 std::string dummyfile;
490 size_ = surf_parse_get_size(dummyfile, -1, size_str, "disk size", ptr->get_name());
492 const char* current_mount_str = ptr->get_property("mount");
493 if (current_mount_str)
494 mount_point_ = std::string(current_mount_str);
496 mount_point_ = std::string("/");
498 const char* content_str = ptr->get_property("content");
500 content_.reset(parse_content(content_str));
503 FileSystemStorageExt::FileSystemStorageExt(const Storage* ptr) : size_(ptr->get_impl()->size_)
505 content_.reset(parse_content(ptr->get_impl()->content_name_));
508 std::map<std::string, sg_size_t>* FileSystemDiskExt::parse_content(const std::string& filename)
510 if (filename.empty())
513 auto* parse_content = new std::map<std::string, sg_size_t>();
515 std::ifstream* fs = surf_ifsopen(filename);
516 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
517 (boost::join(surf_path, ":")).c_str());
520 std::vector<std::string> tokens;
522 std::getline(*fs, line);
524 if (line.length() > 0) {
525 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
526 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
527 sg_size_t size = std::stoull(tokens.at(1));
530 parse_content->insert({tokens.front(), size});
532 } while (not fs->eof());
534 return parse_content;
537 std::map<std::string, sg_size_t>* FileSystemStorageExt::parse_content(const std::string& filename)
539 if (filename.empty())
542 auto* parse_content = new std::map<std::string, sg_size_t>();
544 std::ifstream* fs = surf_ifsopen(filename);
545 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
546 (boost::join(surf_path, ":")).c_str());
549 std::vector<std::string> tokens;
551 std::getline(*fs, line);
553 if (line.length() > 0) {
554 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
555 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
556 sg_size_t size = std::stoull(tokens.at(1));
559 parse_content->insert({tokens.front(), size});
561 } while (not fs->eof());
563 return parse_content;
566 void FileSystemStorageExt::decr_used_size(sg_size_t size)
568 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
571 void FileSystemStorageExt::incr_used_size(sg_size_t size)
573 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
576 void FileSystemDiskExt::decr_used_size(sg_size_t size)
578 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
581 void FileSystemDiskExt::incr_used_size(sg_size_t size)
583 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
588 using simgrid::s4u::FileDescriptorHostExt;
589 using simgrid::s4u::FileSystemDiskExt;
590 using simgrid::s4u::FileSystemStorageExt;
592 static void on_disk_creation(simgrid::s4u::Disk& d)
594 d.extension_set(new FileSystemDiskExt(&d));
596 static void on_storage_creation(simgrid::s4u::Storage& st)
598 st.extension_set(new FileSystemStorageExt(&st));
601 static void on_host_creation(simgrid::s4u::Host& host)
603 host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
606 static void on_platform_created()
608 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
609 const char* remote_disk_str = host->get_property("remote_disk");
610 if (remote_disk_str) {
611 std::vector<std::string> tokens;
612 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
613 std::string mount_point = tokens[0];
614 simgrid::s4u::Host* remote_host = simgrid::s4u::Host::by_name_or_null(tokens[2]);
615 xbt_assert(remote_host, "You're trying to access a host that does not exist. Please check your platform file");
617 simgrid::s4u::Disk* disk = nullptr;
618 for (auto const& d : remote_host->get_disks())
619 if (d->get_name() == tokens[1]) {
624 xbt_assert(disk, "You're trying to mount a disk that does not exist. Please check your platform file");
625 disk->extension<FileSystemDiskExt>()->add_remote_mount(remote_host, mount_point);
626 host->add_disk(disk);
628 XBT_DEBUG("Host '%s' wants to mount a remote disk: %s of %s mounted on %s", host->get_cname(), disk->get_cname(),
629 remote_host->get_cname(), mount_point.c_str());
630 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
635 static void on_simulation_end()
637 XBT_DEBUG("Simulation is over, time to unregister remote disks if any");
638 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
639 const char* remote_disk_str = host->get_property("remote_disk");
640 if (remote_disk_str) {
641 std::vector<std::string> tokens;
642 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
643 XBT_DEBUG("Host '%s' wants to unmount a remote disk: %s of %s mounted on %s", host->get_cname(),
644 tokens[1].c_str(), tokens[2].c_str(), tokens[0].c_str());
645 host->remove_disk(tokens[1]);
646 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
651 /* **************************** Public interface *************************** */
652 /** @brief Initialize the file system plugin.
653 @ingroup plugin_filesystem
656 See the examples in :ref:`s4u_ex_disk_io`.
659 void sg_storage_file_system_init()
661 sg_storage_max_file_descriptors = 1024;
662 simgrid::config::bind_flag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
663 "Maximum number of concurrently opened files per host. Default is 1024");
665 if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
666 FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
667 simgrid::s4u::Storage::on_creation.connect(&on_storage_creation);
670 if (not FileSystemDiskExt::EXTENSION_ID.valid()) {
671 FileSystemDiskExt::EXTENSION_ID = simgrid::s4u::Disk::extension_create<FileSystemDiskExt>();
672 simgrid::s4u::Disk::on_creation.connect(&on_disk_creation);
675 if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
676 FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
677 simgrid::s4u::Host::on_creation.connect(&on_host_creation);
679 simgrid::s4u::Engine::on_platform_created.connect(&on_platform_created);
680 simgrid::s4u::Engine::on_simulation_end.connect(&on_simulation_end);
683 sg_file_t sg_file_open(const char* fullpath, void* data)
685 return new simgrid::s4u::File(fullpath, data);
688 sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
690 return fd->read(size);
693 sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
695 return fd->write(size);
698 void sg_file_close(const_sg_file_t fd)
703 /** Retrieves the path to the file
704 * @ingroup plugin_filesystem
706 const char* sg_file_get_name(const_sg_file_t fd)
708 xbt_assert((fd != nullptr), "Invalid file descriptor");
709 return fd->get_path();
712 /** Retrieves the size of the file
713 * @ingroup plugin_filesystem
715 sg_size_t sg_file_get_size(const_sg_file_t fd)
720 void sg_file_dump(const_sg_file_t fd)
725 /** Retrieves the user data associated with the file
726 * @ingroup plugin_filesystem
728 void* sg_file_get_data(const_sg_file_t fd)
730 return fd->get_data();
733 /** Changes the user data associated with the file
734 * @ingroup plugin_filesystem
736 void sg_file_set_data(sg_file_t fd, void* data)
742 * @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).
743 * @ingroup plugin_filesystem
745 * @param fd : file object that identifies the stream
746 * @param offset : number of bytes to offset from origin
747 * @param origin : Position used as reference for the offset. It is specified by one of the following constants defined
748 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
749 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
751 void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
753 fd->seek(offset, origin);
756 sg_size_t sg_file_tell(const_sg_file_t fd)
761 void sg_file_move(const_sg_file_t fd, const char* fullpath)
766 void sg_file_unlink(sg_file_t fd)
773 * @brief Copy a file to another location on a remote host.
774 * @ingroup plugin_filesystem
776 * @param file : the file to move
777 * @param host : the remote host where the file has to be copied
778 * @param fullpath : the complete path destination on the remote host
779 * @return If successful, the function returns 0. Otherwise, it returns -1.
781 int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
783 return file->remote_copy(host, fullpath);
787 * @brief Move a file to another location on a remote host.
788 * @ingroup plugin_filesystem
790 * @param file : the file to move
791 * @param host : the remote host where the file has to be moved
792 * @param fullpath : the complete path destination on the remote host
793 * @return If successful, the function returns 0. Otherwise, it returns -1.
795 int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
797 return file->remote_move(host, fullpath);
800 sg_size_t sg_disk_get_size_free(const_sg_disk_t d)
802 return d->extension<FileSystemDiskExt>()->get_size() - d->extension<FileSystemDiskExt>()->get_used_size();
805 sg_size_t sg_disk_get_size_used(const_sg_disk_t d)
807 return d->extension<FileSystemDiskExt>()->get_used_size();
810 sg_size_t sg_disk_get_size(const_sg_disk_t d)
812 return d->extension<FileSystemDiskExt>()->get_size();
815 const char* sg_disk_get_mount_point(const_sg_disk_t d)
817 return d->extension<FileSystemDiskExt>()->get_mount_point();
820 sg_size_t sg_storage_get_size_free(const_sg_storage_t st)
822 return st->extension<FileSystemStorageExt>()->get_size() - st->extension<FileSystemStorageExt>()->get_used_size();
825 sg_size_t sg_storage_get_size_used(const_sg_storage_t st)
827 return st->extension<FileSystemStorageExt>()->get_used_size();
830 sg_size_t sg_storage_get_size(const_sg_storage_t st)
832 return st->extension<FileSystemStorageExt>()->get_size();
835 xbt_dict_t sg_storage_get_content(const_sg_storage_t storage)
837 const std::map<std::string, sg_size_t>* content =
838 storage->extension<simgrid::s4u::FileSystemStorageExt>()->get_content();
839 // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
840 xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
842 for (auto const& entry : *content) {
843 auto* psize = new sg_size_t(entry.second);
844 xbt_dict_set(content_as_dict, entry.first.c_str(), psize);
846 return content_as_dict;
849 xbt_dict_t sg_host_get_storage_content(sg_host_t host)
851 xbt_assert((host != nullptr), "Invalid parameters");
852 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
853 for (auto const& elm : host->get_mounted_storages())
854 xbt_dict_set(contents, elm.first.c_str(), sg_storage_get_content(elm.second));