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>
21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_file, s4u, "S4U files");
22 int sg_storage_max_file_descriptors = 1024;
24 /** @defgroup plugin_filesystem Plugin FileSystem
26 * This adds the notion of Files on top of the storage notion that provided by the core of SimGrid.
27 * Activate this plugin at will.
32 template class xbt::Extendable<s4u::File>;
35 simgrid::xbt::Extension<Disk, FileSystemDiskExt> FileSystemDiskExt::EXTENSION_ID;
36 simgrid::xbt::Extension<Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
37 simgrid::xbt::Extension<Host, FileDescriptorHostExt> FileDescriptorHostExt::EXTENSION_ID;
39 Storage* File::find_local_storage_on(Host* host)
41 Storage* st = nullptr;
42 size_t longest_prefix_length = 0;
43 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
45 for (auto const& mnt : host->get_mounted_storages()) {
46 XBT_DEBUG("See '%s'", mnt.first.c_str());
47 mount_point_ = fullpath_.substr(0, mnt.first.length());
49 if (mount_point_ == mnt.first && mnt.first.length() > longest_prefix_length) {
50 /* The current mount name is found in the full path and is bigger than the previous*/
51 longest_prefix_length = mnt.first.length();
55 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
56 mount_point_ = fullpath_.substr(0, longest_prefix_length);
57 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
59 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
64 Disk* File::find_local_disk_on(const Host* host)
67 size_t longest_prefix_length = 0;
68 for (auto const& disk : host->get_disks()) {
69 std::string current_mount;
70 if (disk->get_host() != host)
71 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point(disk->get_host());
73 current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
74 mount_point_ = fullpath_.substr(0, current_mount.length());
75 if (mount_point_ == current_mount && current_mount.length() > longest_prefix_length) {
76 /* The current mount name is found in the full path and is bigger than the previous*/
77 longest_prefix_length = current_mount.length();
80 if (longest_prefix_length > 0) { /* Mount point found, split fullpath_ into mount_name and path+filename*/
81 mount_point_ = fullpath_.substr(0, longest_prefix_length);
82 if (mount_point_ == std::string("/"))
85 path_ = fullpath_.substr(longest_prefix_length, fullpath_.length());
86 XBT_DEBUG("%s + %s", mount_point_.c_str(), path_.c_str());
88 xbt_die("Can't find mount point for '%s' on '%s'", fullpath_.c_str(), host->get_cname());
93 File::File(const std::string& fullpath, void* userdata) : File(fullpath, Host::current(), userdata) {}
95 File::File(const std::string& fullpath, sg_host_t host, void* userdata) : fullpath_(fullpath)
97 kernel::actor::simcall([this, &host, userdata] {
98 this->set_data(userdata);
99 // this cannot fail because we get a xbt_die if the mountpoint does not exist
100 if (not host->get_mounted_storages().empty()) {
101 local_storage_ = find_local_storage_on(host);
103 if (not host->get_disks().empty()) {
104 local_disk_ = find_local_disk_on(host);
107 // assign a file descriptor id to the newly opened File
108 FileDescriptorHostExt* ext = host->extension<simgrid::s4u::FileDescriptorHostExt>();
109 if (ext->file_descriptor_table == nullptr) {
110 ext->file_descriptor_table.reset(new std::vector<int>(sg_storage_max_file_descriptors));
111 std::iota(ext->file_descriptor_table->rbegin(), ext->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
113 xbt_assert(not ext->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
114 desc_id = ext->file_descriptor_table->back();
115 ext->file_descriptor_table->pop_back();
117 XBT_DEBUG("\tOpen file '%s'", path_.c_str());
118 std::map<std::string, sg_size_t>* content = nullptr;
120 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
123 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
125 // if file does not exist create an empty file
127 auto sz = content->find(path_);
128 if (sz != content->end()) {
132 content->insert({path_, size_});
133 XBT_DEBUG("File '%s' was not found, file created.", path_.c_str());
141 std::vector<int>* desc_table =
142 Host::current()->extension<simgrid::s4u::FileDescriptorHostExt>()->file_descriptor_table.get();
143 kernel::actor::simcall([this, desc_table] { desc_table->push_back(this->desc_id); });
146 void File::dump() const
149 XBT_INFO("File Descriptor information:\n"
150 "\t\tFull path: '%s'\n"
152 "\t\tMount point: '%s'\n"
153 "\t\tStorage Id: '%s'\n"
154 "\t\tStorage Type: '%s'\n"
155 "\t\tFile Descriptor Id: %d",
156 get_path(), size_, mount_point_.c_str(), local_storage_->get_cname(), local_storage_->get_type(), desc_id);
158 XBT_INFO("File Descriptor information:\n"
159 "\t\tFull path: '%s'\n"
161 "\t\tMount point: '%s'\n"
162 "\t\tDisk Id: '%s'\n"
163 "\t\tHost Id: '%s'\n"
164 "\t\tFile Descriptor Id: %d",
165 get_path(), size_, mount_point_.c_str(), local_disk_->get_cname(), local_disk_->get_host()->get_cname(),
169 sg_size_t File::read(sg_size_t size)
171 if (size_ == 0) /* Nothing to read, return */
173 sg_size_t read_size = 0;
174 Host* host = nullptr;
175 if (local_storage_) {
176 /* Find the host where the file is physically located and read it */
177 host = local_storage_->get_host();
178 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
179 // if the current position is close to the end of the file, we may not be able to read the requested size
180 read_size = local_storage_->read(std::min(size, size_ - current_position_));
181 current_position_ += read_size;
185 /* Find the host where the file is physically located and read it */
186 host = local_disk_->get_host();
187 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
188 // if the current position is close to the end of the file, we may not be able to read the requested size
189 read_size = local_disk_->read(std::min(size, size_ - current_position_));
190 current_position_ += read_size;
193 if (host && host->get_name() != Host::current()->get_name() && read_size > 0) {
194 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
195 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), read_size);
196 host->sendto(Host::current(), read_size);
202 /** @brief Write into a file (local or remote)
203 * @ingroup plugin_filesystem
205 * @param size of the file to write
206 * @return the number of bytes successfully write or -1 if an error occurred
208 sg_size_t File::write_on_disk(sg_size_t size, bool write_inside)
210 sg_size_t write_size = 0;
211 /* Find the host where the file is physically located (remote or local)*/
212 Host* host = local_disk_->get_host();
214 if (host && host->get_name() != Host::current()->get_name()) {
215 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
216 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
217 Host::current()->sendto(host, size);
219 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_disk_->get_cname(), size, size_,
220 sg_disk_get_size_used(local_disk_), sg_disk_get_size(local_disk_));
221 // If the storage is full before even starting to write
222 if (sg_disk_get_size_used(local_disk_) >= sg_disk_get_size(local_disk_))
224 if (not write_inside) {
225 /* Subtract the part of the file that might disappear from the used sized on the storage element */
226 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_ - current_position_);
227 write_size = local_disk_->write(size);
228 local_disk_->extension<FileSystemDiskExt>()->incr_used_size(write_size);
229 current_position_ += write_size;
230 size_ = current_position_;
232 write_size = local_disk_->write(size);
233 current_position_ += write_size;
234 if (current_position_ > size_)
235 size_ = current_position_;
237 kernel::actor::simcall([this] {
238 std::map<std::string, sg_size_t>* content = local_disk_->extension<FileSystemDiskExt>()->get_content();
240 content->erase(path_);
241 content->insert({path_, size_});
247 sg_size_t File::write_on_storage(sg_size_t size, bool write_inside)
249 sg_size_t write_size = 0;
250 /* Find the host where the file is physically located (remote or local)*/
251 Host* host = local_storage_->get_host();
253 if (host && host->get_name() != Host::current()->get_name()) {
254 /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
255 XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->get_cname(), size);
256 Host::current()->sendto(host, size);
259 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu' '%llu:%llu'", get_path(), local_storage_->get_cname(), size, size_,
260 sg_storage_get_size_used(local_storage_), sg_storage_get_size(local_storage_));
261 // If the storage is full before even starting to write
262 if (sg_storage_get_size_used(local_storage_) >= sg_storage_get_size(local_storage_))
264 if (not write_inside) {
265 /* Subtract the part of the file that might disappear from the used sized on the storage element */
266 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_ - current_position_);
267 write_size = local_storage_->write(size);
268 local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
269 current_position_ += write_size;
270 size_ = current_position_;
272 write_size = local_storage_->write(size);
273 current_position_ += write_size;
274 if (current_position_ > size_)
275 size_ = current_position_;
277 kernel::actor::simcall([this] {
278 std::map<std::string, sg_size_t>* content = local_storage_->extension<FileSystemStorageExt>()->get_content();
280 content->erase(path_);
281 content->insert({path_, size_});
287 sg_size_t File::write(sg_size_t size, bool write_inside)
289 if (size == 0) /* Nothing to write, return */
293 return write_on_disk(size, write_inside);
295 return write_on_storage(size, write_inside);
300 sg_size_t File::size() const
305 void File::seek(sg_offset_t offset)
307 current_position_ = offset;
310 void File::seek(sg_offset_t offset, int origin)
314 current_position_ = offset;
317 current_position_ += offset;
320 current_position_ = size_ + offset;
327 sg_size_t File::tell() const
329 return current_position_;
332 void File::move(const std::string& fullpath) const
334 /* Check if the new full path is on the same mount point */
335 if (fullpath.compare(0, mount_point_.length(), mount_point_) == 0) {
336 std::map<std::string, sg_size_t>* content = nullptr;
338 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
340 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
342 auto sz = content->find(path_);
343 if (sz != content->end()) { // src file exists
344 sg_size_t new_size = sz->second;
345 content->erase(path_);
346 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
347 content->insert({path.c_str(), new_size});
348 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
350 XBT_WARN("File %s doesn't exist", path_.c_str());
354 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
358 int File::unlink() const
360 /* Check if the file is on local storage */
361 std::map<std::string, sg_size_t>* content = nullptr;
362 const char* name = "";
363 if (local_storage_) {
364 content = local_storage_->extension<FileSystemStorageExt>()->get_content();
365 name = local_storage_->get_cname();
368 content = local_disk_->extension<FileSystemDiskExt>()->get_content();
369 name = local_disk_->get_cname();
372 if (not content || content->find(path_) == content->end()) {
373 XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), name);
376 XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), name);
379 local_storage_->extension<FileSystemStorageExt>()->decr_used_size(size_);
382 local_disk_->extension<FileSystemDiskExt>()->decr_used_size(size_);
384 // Remove the file from storage
385 content->erase(path_);
391 int File::remote_copy(sg_host_t host, const char* fullpath)
393 /* Find the host where the file is physically located and read it */
394 Host* src_host = nullptr;
395 if (local_storage_) {
396 src_host = local_storage_->get_host();
397 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_storage_->get_cname());
401 src_host = local_disk_->get_host();
402 XBT_DEBUG("READ %s on disk '%s'", get_path(), local_disk_->get_cname());
406 // if the current position is close to the end of the file, we may not be able to read the requested size
407 sg_size_t read_size = 0;
409 read_size = local_storage_->read(size_);
411 read_size = local_disk_->read(size_);
413 current_position_ += read_size;
415 Host* dst_host = host;
416 size_t longest_prefix_length = 0;
417 if (local_storage_) {
418 /* Find the host that owns the storage where the file has to be copied */
419 const Storage* storage_dest = nullptr;
421 for (auto const& elm : host->get_mounted_storages()) {
422 std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
423 if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
424 /* The current mount name is found in the full path and is bigger than the previous*/
425 longest_prefix_length = elm.first.length();
426 storage_dest = elm.second;
430 if (storage_dest != nullptr) {
431 /* Mount point found, retrieve the host the storage is attached to */
432 dst_host = storage_dest->get_host();
434 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->get_cname());
440 const Disk* dst_disk = nullptr;
442 for (auto const& disk : host->get_disks()) {
443 std::string current_mount = disk->extension<FileSystemDiskExt>()->get_mount_point();
444 std::string mount_point = std::string(fullpath).substr(0, current_mount.length());
445 if (mount_point == current_mount && current_mount.length() > longest_prefix_length) {
446 /* The current mount name is found in the full path and is bigger than the previous*/
447 longest_prefix_length = current_mount.length();
452 if (dst_disk == nullptr) {
453 XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->get_cname());
459 XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->get_cname(),
460 dst_host->get_cname());
461 src_host->sendto(dst_host, read_size);
464 /* Create file on remote host, write it and close it */
465 File* fd = new File(fullpath, dst_host, nullptr);
466 if (local_storage_) {
467 sg_size_t write_size = fd->local_storage_->write(read_size);
468 fd->local_storage_->extension<FileSystemStorageExt>()->incr_used_size(write_size);
469 (*(fd->local_storage_->extension<FileSystemStorageExt>()->get_content()))[path_] = size_;
472 fd->write(read_size);
477 int File::remote_move(sg_host_t host, const char* fullpath)
479 int res = remote_copy(host, fullpath);
484 FileSystemDiskExt::FileSystemDiskExt(const Disk* ptr)
486 const char* size_str = ptr->get_property("size");
487 std::string dummyfile;
489 size_ = surf_parse_get_size(dummyfile, -1, size_str, "disk size", ptr->get_name());
491 const char* current_mount_str = ptr->get_property("mount");
492 if (current_mount_str)
493 mount_point_ = std::string(current_mount_str);
495 mount_point_ = std::string("/");
497 const char* content_str = ptr->get_property("content");
499 content_.reset(parse_content(content_str));
502 FileSystemStorageExt::FileSystemStorageExt(const Storage* ptr) : size_(ptr->get_impl()->size_)
504 content_.reset(parse_content(ptr->get_impl()->content_name_));
507 std::map<std::string, sg_size_t>* FileSystemDiskExt::parse_content(const std::string& filename)
509 if (filename.empty())
512 std::map<std::string, sg_size_t>* parse_content = new std::map<std::string, sg_size_t>();
514 std::ifstream* fs = surf_ifsopen(filename);
515 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
516 (boost::join(surf_path, ":")).c_str());
519 std::vector<std::string> tokens;
521 std::getline(*fs, line);
523 if (line.length() > 0) {
524 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
525 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
526 sg_size_t size = std::stoull(tokens.at(1));
529 parse_content->insert({tokens.front(), size});
531 } while (not fs->eof());
533 return parse_content;
536 std::map<std::string, sg_size_t>* FileSystemStorageExt::parse_content(const std::string& filename)
538 if (filename.empty())
541 std::map<std::string, sg_size_t>* parse_content = new std::map<std::string, sg_size_t>();
543 std::ifstream* fs = surf_ifsopen(filename);
544 xbt_assert(not fs->fail(), "Cannot open file '%s' (path=%s)", filename.c_str(),
545 (boost::join(surf_path, ":")).c_str());
548 std::vector<std::string> tokens;
550 std::getline(*fs, line);
552 if (line.length() > 0) {
553 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
554 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
555 sg_size_t size = std::stoull(tokens.at(1));
558 parse_content->insert({tokens.front(), size});
560 } while (not fs->eof());
562 return parse_content;
565 void FileSystemStorageExt::decr_used_size(sg_size_t size)
567 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
570 void FileSystemStorageExt::incr_used_size(sg_size_t size)
572 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
575 void FileSystemDiskExt::decr_used_size(sg_size_t size)
577 simgrid::kernel::actor::simcall([this, size] { used_size_ -= size; });
580 void FileSystemDiskExt::incr_used_size(sg_size_t size)
582 simgrid::kernel::actor::simcall([this, size] { used_size_ += size; });
587 using simgrid::s4u::FileDescriptorHostExt;
588 using simgrid::s4u::FileSystemDiskExt;
589 using simgrid::s4u::FileSystemStorageExt;
591 static void on_disk_creation(simgrid::s4u::Disk& d)
593 d.extension_set(new FileSystemDiskExt(&d));
595 static void on_storage_creation(simgrid::s4u::Storage& st)
597 st.extension_set(new FileSystemStorageExt(&st));
600 static void on_host_creation(simgrid::s4u::Host& host)
602 host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
605 static void on_platform_created()
607 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
608 const char* remote_disk_str = host->get_property("remote_disk");
609 if (remote_disk_str) {
610 std::vector<std::string> tokens;
611 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
612 std::string mount_point = tokens[0];
613 simgrid::s4u::Host* remote_host = simgrid::s4u::Host::by_name_or_null(tokens[2]);
614 xbt_assert(remote_host, "You're trying to access a host that does not exist. Please check your platform file");
616 simgrid::s4u::Disk* disk = nullptr;
617 for (auto const& d : remote_host->get_disks())
618 if (d->get_name() == tokens[1]) {
623 xbt_assert(disk, "You're trying to mount a disk that does not exist. Please check your platform file");
624 disk->extension<FileSystemDiskExt>()->add_remote_mount(remote_host, mount_point);
625 host->add_disk(disk);
627 XBT_DEBUG("Host '%s' wants to mount a remote disk: %s of %s mounted on %s", host->get_cname(), disk->get_cname(),
628 remote_host->get_cname(), mount_point.c_str());
629 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
634 static void on_simulation_end()
636 XBT_DEBUG("Simulation is over, time to unregister remote disks if any");
637 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts()) {
638 const char* remote_disk_str = host->get_property("remote_disk");
639 if (remote_disk_str) {
640 std::vector<std::string> tokens;
641 boost::split(tokens, remote_disk_str, boost::is_any_of(":"));
642 XBT_DEBUG("Host '%s' wants to unmount a remote disk: %s of %s mounted on %s", host->get_cname(),
643 tokens[1].c_str(), tokens[2].c_str(), tokens[0].c_str());
644 host->remove_disk(tokens[1]);
645 XBT_DEBUG("Host '%s' now has %zu disks", host->get_cname(), host->get_disks().size());
650 /* **************************** Public interface *************************** */
651 /** @brief Initialize the file system plugin.
652 @ingroup plugin_filesystem
655 See the examples in :ref:`s4u_ex_disk_io`.
658 void sg_storage_file_system_init()
660 sg_storage_max_file_descriptors = 1024;
661 simgrid::config::bind_flag(sg_storage_max_file_descriptors, "storage/max_file_descriptors",
662 "Maximum number of concurrently opened files per host. Default is 1024");
664 if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
665 FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
666 simgrid::s4u::Storage::on_creation.connect(&on_storage_creation);
669 if (not FileSystemDiskExt::EXTENSION_ID.valid()) {
670 FileSystemDiskExt::EXTENSION_ID = simgrid::s4u::Disk::extension_create<FileSystemDiskExt>();
671 simgrid::s4u::Disk::on_creation.connect(&on_disk_creation);
674 if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
675 FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
676 simgrid::s4u::Host::on_creation.connect(&on_host_creation);
678 simgrid::s4u::Engine::on_platform_created.connect(&on_platform_created);
679 simgrid::s4u::Engine::on_simulation_end.connect(&on_simulation_end);
682 sg_file_t sg_file_open(const char* fullpath, void* data)
684 return new simgrid::s4u::File(fullpath, data);
687 sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
689 return fd->read(size);
692 sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
694 return fd->write(size);
697 void sg_file_close(const_sg_file_t fd)
702 /** Retrieves the path to the file
703 * @ingroup plugin_filesystem
705 const char* sg_file_get_name(const_sg_file_t fd)
707 xbt_assert((fd != nullptr), "Invalid file descriptor");
708 return fd->get_path();
711 /** Retrieves the size of the file
712 * @ingroup plugin_filesystem
714 sg_size_t sg_file_get_size(const_sg_file_t fd)
719 void sg_file_dump(const_sg_file_t fd)
724 /** Retrieves the user data associated with the file
725 * @ingroup plugin_filesystem
727 void* sg_file_get_data(const_sg_file_t fd)
729 return fd->get_data();
732 /** Changes the user data associated with the file
733 * @ingroup plugin_filesystem
735 void sg_file_set_data(sg_file_t fd, void* data)
741 * @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).
742 * @ingroup plugin_filesystem
744 * @param fd : file object that identifies the stream
745 * @param offset : number of bytes to offset from origin
746 * @param origin : Position used as reference for the offset. It is specified by one of the following constants defined
747 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
748 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
750 void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
752 fd->seek(offset, origin);
755 sg_size_t sg_file_tell(const_sg_file_t fd)
760 void sg_file_move(const_sg_file_t fd, const char* fullpath)
765 void sg_file_unlink(sg_file_t fd)
772 * @brief Copy a file to another location on a remote host.
773 * @ingroup plugin_filesystem
775 * @param file : the file to move
776 * @param host : the remote host where the file has to be copied
777 * @param fullpath : the complete path destination on the remote host
778 * @return If successful, the function returns 0. Otherwise, it returns -1.
780 int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
782 return file->remote_copy(host, fullpath);
786 * @brief Move a file to another location on a remote host.
787 * @ingroup plugin_filesystem
789 * @param file : the file to move
790 * @param host : the remote host where the file has to be moved
791 * @param fullpath : the complete path destination on the remote host
792 * @return If successful, the function returns 0. Otherwise, it returns -1.
794 int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
796 return file->remote_move(host, fullpath);
799 sg_size_t sg_disk_get_size_free(const_sg_disk_t d)
801 return d->extension<FileSystemDiskExt>()->get_size() - d->extension<FileSystemDiskExt>()->get_used_size();
804 sg_size_t sg_disk_get_size_used(const_sg_disk_t d)
806 return d->extension<FileSystemDiskExt>()->get_used_size();
809 sg_size_t sg_disk_get_size(const_sg_disk_t d)
811 return d->extension<FileSystemDiskExt>()->get_size();
814 const char* sg_disk_get_mount_point(const_sg_disk_t d)
816 return d->extension<FileSystemDiskExt>()->get_mount_point();
819 sg_size_t sg_storage_get_size_free(const_sg_storage_t st)
821 return st->extension<FileSystemStorageExt>()->get_size() - st->extension<FileSystemStorageExt>()->get_used_size();
824 sg_size_t sg_storage_get_size_used(const_sg_storage_t st)
826 return st->extension<FileSystemStorageExt>()->get_used_size();
829 sg_size_t sg_storage_get_size(const_sg_storage_t st)
831 return st->extension<FileSystemStorageExt>()->get_size();
834 xbt_dict_t sg_storage_get_content(const_sg_storage_t storage)
836 const std::map<std::string, sg_size_t>* content =
837 storage->extension<simgrid::s4u::FileSystemStorageExt>()->get_content();
838 // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
839 xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
841 for (auto const& entry : *content) {
842 sg_size_t* psize = new sg_size_t;
843 *psize = 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));