1 /* Copyright (c) 2017. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "src/surf/FileImpl.hpp"
8 #include "src/surf/StorageImpl.hpp"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_file, surf, "Logging specific to the SURF file module");
14 FileImpl::FileImpl(sg_storage_t st, std::string path, std::string mount) : path_(path), mount_point_(mount)
16 XBT_DEBUG("\tOpen file '%s'", path.c_str());
17 location_ = st->getImpl();
18 std::map<std::string, sg_size_t>* content = location_->getContent();
19 // if file does not exist create an empty file
20 if (content->find(path) != content->end())
21 size_ = content->at(path);
24 content->insert({path, size_});
25 XBT_DEBUG("File '%s' was not found, file created.", path.c_str());
29 Action* FileImpl::read(sg_size_t size)
31 XBT_DEBUG("READ %s on disk '%s'", cname(), location_->cname());
32 if (current_position_ + size > size_) {
33 if (current_position_ > size_) {
36 size = size_ - current_position_;
38 current_position_ = size_;
40 current_position_ += size;
42 return location_->read(size);
45 Action* FileImpl::write(sg_size_t size)
47 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", cname(), location_->cname(), size, size_);
49 StorageAction* action = location_->write(size);
51 /* Substract the part of the file that might disappear from the used sized on the storage element */
52 location_->usedSize_ -= (size_ - current_position_);
53 // If the storage is full before even starting to write
54 if (location_->usedSize_ >= location_->getSize()) {
55 action->setState(Action::State::failed);
60 int FileImpl::seek(sg_offset_t offset, int origin)
64 current_position_ = offset;
67 current_position_ += offset;
70 current_position_ = size_ + offset;
77 int FileImpl::unlink()
79 /* Check if the file is on this storage */
80 if (location_->getContent()->find(path_) == location_->getContent()->end()) {
81 XBT_WARN("File %s is not on disk %s. Impossible to unlink", cname(), location_->cname());
84 XBT_DEBUG("UNLINK %s on disk '%s'", cname(), location_->cname());
85 location_->usedSize_ -= size_;
87 // Remove the file from storage
88 location_->getContent()->erase(path_);
94 void FileImpl::move(const char* fullpath)
96 /* Check if the new full path is on the same mount point */
97 if (not strncmp(mount_point_.c_str(), fullpath, mount_point_.size())) {
98 std::map<std::string, sg_size_t>* content = location_->getContent();
99 if (content->find(path_) != content->end()) { // src file exists
100 sg_size_t new_size = content->at(path_);
101 content->erase(path_);
102 std::string path = std::string(fullpath).substr(mount_point_.size(), strlen(fullpath));
103 content->insert({path.c_str(), new_size});
104 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath, new_size);
106 XBT_WARN("File %s doesn't exist", path_.c_str());
109 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath, mount_point_.c_str());