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 auto sz = content->find(path);
21 if (sz != content->end()) {
25 content->insert({path, size_});
26 XBT_DEBUG("File '%s' was not found, file created.", path.c_str());
30 Action* FileImpl::read(sg_size_t size)
32 XBT_DEBUG("READ %s on disk '%s'", cname(), location_->cname());
33 if (current_position_ + size > size_) {
34 if (current_position_ > size_) {
37 size = size_ - current_position_;
39 current_position_ = size_;
41 current_position_ += size;
43 return location_->read(size);
46 Action* FileImpl::write(sg_size_t size)
48 XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", cname(), location_->cname(), size, size_);
50 StorageAction* action = location_->write(size);
52 /* Substract the part of the file that might disappear from the used sized on the storage element */
53 location_->usedSize_ -= (size_ - current_position_);
54 // If the storage is full before even starting to write
55 if (location_->usedSize_ >= location_->getSize()) {
56 action->setState(Action::State::failed);
61 int FileImpl::seek(sg_offset_t offset, int origin)
65 current_position_ = offset;
68 current_position_ += offset;
71 current_position_ = size_ + offset;
78 int FileImpl::unlink()
80 /* Check if the file is on this storage */
81 if (location_->getContent()->find(path_) == location_->getContent()->end()) {
82 XBT_WARN("File %s is not on disk %s. Impossible to unlink", cname(), location_->cname());
85 XBT_DEBUG("UNLINK %s on disk '%s'", cname(), location_->cname());
86 location_->usedSize_ -= size_;
88 // Remove the file from storage
89 location_->getContent()->erase(path_);
95 void FileImpl::move(std::string fullpath)
97 /* Check if the new full path is on the same mount point */
98 if (not strncmp(mount_point_.c_str(), fullpath.c_str(), mount_point_.size())) {
99 std::map<std::string, sg_size_t>* content = location_->getContent();
100 auto sz = content->find(path_);
101 if (sz != content->end()) { // src file exists
102 sg_size_t new_size = sz->second;
103 content->erase(path_);
104 std::string path = fullpath.substr(mount_point_.length(), fullpath.length());
105 content->insert({path.c_str(), new_size});
106 XBT_DEBUG("Move file from %s to %s, size '%llu'", path_.c_str(), fullpath.c_str(), new_size);
108 XBT_WARN("File %s doesn't exist", path_.c_str());
111 XBT_WARN("New full path %s is not on the same mount point: %s.", fullpath.c_str(), mount_point_.c_str());