1 /* Copyright (c) 2015-2017. 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. */
8 #include "simgrid/s4u/Host.hpp"
9 #include "simgrid/s4u/Storage.hpp"
10 #include "simgrid/simix.hpp"
11 #include "src/plugins/file_system/FileSystem.hpp"
12 #include "src/surf/HostImpl.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_CATEGORY(s4u_file, "S4U files");
22 int sg_storage_max_file_descriptors = 1024;
26 simgrid::xbt::Extension<Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
27 simgrid::xbt::Extension<Host, FileDescriptorHostExt> FileDescriptorHostExt::EXTENSION_ID;
29 File::File(std::string fullpath, void* userdata) : File(fullpath, Host::current(), userdata){};
31 File::File(std::string fullpath, sg_host_t host, void* userdata) : fullpath_(fullpath), userdata_(userdata)
33 // this cannot fail because we get a xbt_die if the mountpoint does not exist
34 Storage* st = nullptr;
35 size_t longest_prefix_length = 0;
36 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath.c_str(), host->getCname());
38 for (auto const& mnt : host->getMountedStorages()) {
39 XBT_DEBUG("See '%s'", mnt.first.c_str());
40 mount_point_ = fullpath.substr(0, mnt.first.length());
42 if (mount_point_ == mnt.first && mnt.first.length() > longest_prefix_length) {
43 /* The current mount name is found in the full path and is bigger than the previous*/
44 longest_prefix_length = mnt.first.length();
48 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
49 mount_point_ = fullpath.substr(0, longest_prefix_length);
50 path_ = fullpath.substr(longest_prefix_length, fullpath.length());
52 xbt_die("Can't find mount point for '%s' on '%s'", fullpath.c_str(), host->getCname());
56 // assign a file descriptor id to the newly opened File
57 FileDescriptorHostExt* ext = host->extension<simgrid::s4u::FileDescriptorHostExt>();
58 if (ext->file_descriptor_table == nullptr) {
59 ext->file_descriptor_table = new std::vector<int>(sg_storage_max_file_descriptors);
60 std::iota(ext->file_descriptor_table->rbegin(), ext->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
62 xbt_assert(not ext->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
63 desc_id = ext->file_descriptor_table->back();
64 ext->file_descriptor_table->pop_back();
66 XBT_DEBUG("\tOpen file '%s'", path_.c_str());
67 std::map<std::string, sg_size_t>* content = localStorage->extension<FileSystemStorageExt>()->getContent();
68 // if file does not exist create an empty file
69 auto sz = content->find(path_);
70 if (sz != content->end()) {
74 content->insert({path_, size_});
75 XBT_DEBUG("File '%s' was not found, file created.", path_.c_str());
81 Host::current()->extension<simgrid::s4u::FileDescriptorHostExt>()->file_descriptor_table->push_back(desc_id);
86 XBT_INFO("File Descriptor information:\n"
87 "\t\tFull path: '%s'\n"
89 "\t\tMount point: '%s'\n"
90 "\t\tStorage Id: '%s'\n"
91 "\t\tStorage Type: '%s'\n"
92 "\t\tFile Descriptor Id: %d",
93 getPath(), size_, mount_point_.c_str(), localStorage->getCname(), localStorage->getType(), desc_id);
96 sg_size_t File::read(sg_size_t size)
98 XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
99 // if the current position is close to the end of the file, we may not be able to read the requested size
100 sg_size_t read_size = localStorage->read(std::min(size, size_ - current_position_));
101 current_position_ += read_size;
105 sg_size_t File::write(sg_size_t size)
107 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", getPath(), localStorage->getCname(), size, size_);
108 // If the storage is full before even starting to write
109 if (sg_storage_get_size_used(localStorage) >= sg_storage_get_size(localStorage))
111 /* Substract the part of the file that might disappear from the used sized on the storage element */
112 localStorage->extension<FileSystemStorageExt>()->decrUsedSize(size_ - current_position_);
114 sg_size_t write_size = localStorage->write(size);
115 localStorage->extension<FileSystemStorageExt>()->incrUsedSize(write_size);
117 current_position_ += write_size;
118 size_ = current_position_;
119 std::map<std::string, sg_size_t>* content = localStorage->extension<FileSystemStorageExt>()->getContent();
121 content->erase(path_);
122 content->insert({path_, size_});
127 sg_size_t File::size()
132 void File::seek(sg_offset_t offset)
134 current_position_ = offset;
137 void File::seek(sg_offset_t offset, int origin)
141 current_position_ = offset;
144 current_position_ += offset;
147 current_position_ = size_ + offset;
154 sg_size_t File::tell()
156 return current_position_;
159 void File::move(std::string fullpath)
161 /* Check if the new full path is on the same mount point */
162 if (not strncmp(mount_point_.c_str(), fullpath.c_str(), mount_point_.length())) {
163 std::map<std::string, sg_size_t>* content = localStorage->extension<FileSystemStorageExt>()->getContent();
164 auto sz = content->find(path_);
165 if (sz != content->end()) { // src file exists
166 sg_size_t new_size = sz->second;
167 content->erase(path_);
168 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
169 content->insert({path.c_str(), new_size});
170 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
172 XBT_WARN("File %s doesn't exist", path_.c_str());
175 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());
181 /* Check if the file is on local storage */
182 std::map<std::string, sg_size_t>* content = localStorage->extension<FileSystemStorageExt>()->getContent();
184 if (content->find(path_) == content->end()) {
185 XBT_WARN("File %s is not on disk %s. Impossible to unlink", path_.c_str(), localStorage->getCname());
188 XBT_DEBUG("UNLINK %s on disk '%s'", path_.c_str(), localStorage->getCname());
189 localStorage->extension<FileSystemStorageExt>()->decrUsedSize(size_);
191 // Remove the file from storage
192 content->erase(fullpath_);
198 FileSystemStorageExt::FileSystemStorageExt(simgrid::s4u::Storage* ptr)
200 content_ = parseContent(ptr->getImpl()->content_name);
201 size_ = ptr->getImpl()->size_;
204 FileSystemStorageExt::~FileSystemStorageExt()
209 std::map<std::string, sg_size_t>* FileSystemStorageExt::parseContent(std::string filename)
211 if (filename.empty())
214 std::map<std::string, sg_size_t>* parse_content = new std::map<std::string, sg_size_t>();
216 std::ifstream* fs = surf_ifsopen(filename);
219 std::vector<std::string> tokens;
221 std::getline(*fs, line);
223 if (line.length() > 0) {
224 boost::split(tokens, line, boost::is_any_of(" \t"), boost::token_compress_on);
225 xbt_assert(tokens.size() == 2, "Parse error in %s: %s", filename.c_str(), line.c_str());
226 sg_size_t size = std::stoull(tokens.at(1));
229 parse_content->insert({tokens.front(), size});
231 } while (not fs->eof());
233 return parse_content;
238 using simgrid::s4u::FileSystemStorageExt;
239 using simgrid::s4u::FileDescriptorHostExt;
241 static void onStorageCreation(simgrid::s4u::Storage& st)
243 st.extension_set(new FileSystemStorageExt(&st));
246 static void onStorageDestruction(simgrid::s4u::Storage& st)
248 delete st.extension<FileSystemStorageExt>();
251 static void onHostCreation(simgrid::s4u::Host& host)
253 host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
256 /* **************************** Public interface *************************** */
259 void sg_storage_file_system_init()
261 if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
262 FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
263 simgrid::s4u::Storage::onCreation.connect(&onStorageCreation);
264 simgrid::s4u::Storage::onDestruction.connect(&onStorageDestruction);
267 if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
268 FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
269 simgrid::s4u::Host::onCreation.connect(&onHostCreation);
273 sg_file_t sg_file_open(const char* fullpath, void* data)
275 return new simgrid::s4u::File(fullpath, data);
278 void sg_file_close(sg_file_t fd)
283 const char* sg_file_get_name(sg_file_t fd)
285 xbt_assert((fd != nullptr), "Invalid file descriptor");
286 return fd->getPath();
289 sg_size_t sg_file_get_size(sg_file_t fd)
294 void sg_file_dump(sg_file_t fd)
299 void* sg_file_get_data(sg_file_t fd)
301 return fd->getUserdata();
304 void sg_file_set_data(sg_file_t fd, void* data)
306 fd->setUserdata(data);
310 * \brief Set the file position indicator in the msg_file_t by adding offset bytes
311 * to the position specified by origin (either SEEK_SET, SEEK_CUR, or SEEK_END).
313 * \param fd : file object that identifies the stream
314 * \param offset : number of bytes to offset from origin
315 * \param origin : Position used as reference for the offset. It is specified by one of the following constants defined
316 * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
317 * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
319 void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
321 fd->seek(offset, origin);
324 sg_size_t sg_file_tell(sg_file_t fd)
329 void sg_file_move(sg_file_t fd, const char* fullpath)
334 void sg_file_unlink(sg_file_t fd)
340 sg_size_t sg_storage_get_size_free(sg_storage_t st)
342 return st->extension<FileSystemStorageExt>()->getSize() - st->extension<FileSystemStorageExt>()->getUsedSize();
345 sg_size_t sg_storage_get_size_used(sg_storage_t st)
347 return st->extension<FileSystemStorageExt>()->getUsedSize();
350 sg_size_t sg_storage_get_size(sg_storage_t st)
352 return st->extension<FileSystemStorageExt>()->getSize();
355 xbt_dict_t sg_storage_get_content(sg_storage_t storage)
357 std::map<std::string, sg_size_t>* content = storage->extension<simgrid::s4u::FileSystemStorageExt>()->getContent();
358 // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
359 xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
361 for (auto const& entry : *content) {
362 sg_size_t* psize = new sg_size_t;
363 *psize = entry.second;
364 xbt_dict_set(content_as_dict, entry.first.c_str(), psize, nullptr);
366 return content_as_dict;
369 xbt_dict_t sg_host_get_storage_content(sg_host_t host)
371 xbt_assert((host != nullptr), "Invalid parameters");
372 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
373 for (auto const& elm : host->getMountedStorages())
374 xbt_dict_set(contents, elm.first.c_str(), sg_storage_get_content(elm.second), nullptr);