#include "xbt/log.h"
+#include "simgrid/s4u/Actor.hpp"
#include "simgrid/s4u/Host.hpp"
#include "simgrid/s4u/Storage.hpp"
#include "simgrid/simix.hpp"
#include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/split.hpp>
#include <fstream>
+#include <numeric>
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_file, "S4U files");
+int sg_storage_max_file_descriptors = 1024;
namespace simgrid {
namespace s4u {
-simgrid::xbt::Extension<s4u::Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
+simgrid::xbt::Extension<Storage, FileSystemStorageExt> FileSystemStorageExt::EXTENSION_ID;
+simgrid::xbt::Extension<Host, FileDescriptorHostExt> FileDescriptorHostExt::EXTENSION_ID;
File::File(std::string fullpath, void* userdata) : File(fullpath, Host::current(), userdata){};
localStorage = st;
+ // assign a file descriptor id to the newly opened File
+ FileDescriptorHostExt* ext = host->extension<simgrid::s4u::FileDescriptorHostExt>();
+ if (ext->file_descriptor_table == nullptr) {
+ ext->file_descriptor_table = new std::vector<int>(sg_storage_max_file_descriptors);
+ std::iota(ext->file_descriptor_table->rbegin(), ext->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
+ }
+ xbt_assert(not ext->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
+ desc_id = ext->file_descriptor_table->back();
+ ext->file_descriptor_table->pop_back();
+
XBT_DEBUG("\tOpen file '%s'", path_.c_str());
std::map<std::string, sg_size_t>* content = localStorage->extension<FileSystemStorageExt>()->getContent();
// if file does not exist create an empty file
}
}
+File::~File()
+{
+ Host::current()->extension<simgrid::s4u::FileDescriptorHostExt>()->file_descriptor_table->push_back(desc_id);
+}
+
+void File::dump()
+{
+ XBT_INFO("File Descriptor information:\n"
+ "\t\tFull path: '%s'\n"
+ "\t\tSize: %llu\n"
+ "\t\tMount point: '%s'\n"
+ "\t\tStorage Id: '%s'\n"
+ "\t\tStorage Type: '%s'\n"
+ "\t\tFile Descriptor Id: %d",
+ getPath(), size_, mount_point_.c_str(), localStorage->getCname(), localStorage->getType(), desc_id);
+}
+
sg_size_t File::read(sg_size_t size)
{
+ if (size_ == 0) /* Nothing to read, return */
+ return 0;
+
+ /* Find the host where the file is physically located and read it */
+ Host* host = localStorage->getHost();
XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
// if the current position is close to the end of the file, we may not be able to read the requested size
sg_size_t read_size = localStorage->read(std::min(size, size_ - current_position_));
current_position_ += read_size;
+
+ if (strcmp(host->getCname(), Host::current()->getCname())) {
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->getCname(), read_size);
+ Host* m_host_list[] = {Host::current(), host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, 0, static_cast<double>(read_size), 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+ }
+
return read_size;
}
+/** \brief Write into a file (local or remote)
+ *
+ * \param size of the file to write
+ * \param fd is a the file descriptor
+ * \return the number of bytes successfully write or -1 if an error occurred
+ */
sg_size_t File::write(sg_size_t size)
{
+ if (size == 0) /* Nothing to write, return */
+ return 0;
+
+ /* Find the host where the file is physically located (remote or local)*/
+ Host* host = localStorage->getHost();
+
+ if (strcmp(host->getCname(), Host::current()->getCname())) {
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->getCname(), size);
+ Host* m_host_list[] = {Host::current(), host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, static_cast<double>(size), 0, 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+ }
+
XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", getPath(), localStorage->getCname(), size, size_);
// If the storage is full before even starting to write
if (sg_storage_get_size_used(localStorage) >= sg_storage_get_size(localStorage))
}
}
+int File::remoteCopy(sg_host_t host, const char* fullpath)
+{
+ /* Find the host where the file is physically located and read it */
+ Storage* storage_src = localStorage;
+ Host* src_host = storage_src->getHost();
+ seek(0, SEEK_SET);
+ XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
+ // if the current position is close to the end of the file, we may not be able to read the requested size
+ sg_size_t read_size = localStorage->read(size_);
+ current_position_ += read_size;
+
+ /* Find the host that owns the storage where the file has to be copied */
+ Storage* storage_dest = nullptr;
+ Host* dst_host;
+ size_t longest_prefix_length = 0;
+
+ for (auto const& elm : host->getMountedStorages()) {
+ std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
+ if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
+ /* The current mount name is found in the full path and is bigger than the previous*/
+ longest_prefix_length = elm.first.length();
+ storage_dest = elm.second;
+ }
+ }
+
+ if (storage_dest != nullptr) {
+ /* Mount point found, retrieve the host the storage is attached to */
+ dst_host = storage_dest->getHost();
+ } else {
+ XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->getCname());
+ return -1;
+ }
+
+ XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->getCname(),
+ storage_dest->getHost()->getCname());
+ Host* m_host_list[] = {src_host, dst_host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, static_cast<double>(read_size), 0, 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+
+ /* Create file on remote host, write it and close it */
+ File* fd = new File(fullpath, dst_host, nullptr);
+ sg_size_t write_size = fd->localStorage->write(read_size);
+ fd->localStorage->extension<FileSystemStorageExt>()->incrUsedSize(write_size);
+ (*(fd->localStorage->extension<FileSystemStorageExt>()->getContent()))[path_] = size_;
+ delete fd;
+ return 0;
+}
+
+int File::remoteMove(sg_host_t host, const char* fullpath)
+{
+ int res = remoteCopy(host, fullpath);
+ unlink();
+ return res;
+}
+
FileSystemStorageExt::FileSystemStorageExt(simgrid::s4u::Storage* ptr)
{
content_ = parseContent(ptr->getImpl()->content_name);
}
using simgrid::s4u::FileSystemStorageExt;
+using simgrid::s4u::FileDescriptorHostExt;
static void onStorageCreation(simgrid::s4u::Storage& st)
{
delete st.extension<FileSystemStorageExt>();
}
+static void onHostCreation(simgrid::s4u::Host& host)
+{
+ host.extension_set<FileDescriptorHostExt>(new FileDescriptorHostExt());
+}
+
/* **************************** Public interface *************************** */
SG_BEGIN_DECL()
void sg_storage_file_system_init()
{
+ if (not FileSystemStorageExt::EXTENSION_ID.valid()) {
+ FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
+ simgrid::s4u::Storage::onCreation.connect(&onStorageCreation);
+ simgrid::s4u::Storage::onDestruction.connect(&onStorageDestruction);
+ }
+
+ if (not FileDescriptorHostExt::EXTENSION_ID.valid()) {
+ FileDescriptorHostExt::EXTENSION_ID = simgrid::s4u::Host::extension_create<FileDescriptorHostExt>();
+ simgrid::s4u::Host::onCreation.connect(&onHostCreation);
+ }
+}
+
+sg_file_t sg_file_open(const char* fullpath, void* data)
+{
+ return new simgrid::s4u::File(fullpath, data);
+}
+
+sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
+{
+ return fd->read(size);
+}
+
+sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
+{
+ return fd->write(size);
+}
+
+void sg_file_close(sg_file_t fd)
+{
+ delete fd;
+}
+
+const char* sg_file_get_name(sg_file_t fd)
+{
+ xbt_assert((fd != nullptr), "Invalid file descriptor");
+ return fd->getPath();
+}
+
+sg_size_t sg_file_get_size(sg_file_t fd)
+{
+ return fd->size();
+}
+
+void sg_file_dump(sg_file_t fd)
+{
+ fd->dump();
+}
+
+void* sg_file_get_data(sg_file_t fd)
+{
+ return fd->getUserdata();
+}
+
+void sg_file_set_data(sg_file_t fd, void* data)
+{
+ fd->setUserdata(data);
+}
+
+/**
+ * \brief Set the file position indicator in the msg_file_t by adding offset bytes
+ * to the position specified by origin (either SEEK_SET, SEEK_CUR, or SEEK_END).
+ *
+ * \param fd : file object that identifies the stream
+ * \param offset : number of bytes to offset from origin
+ * \param origin : Position used as reference for the offset. It is specified by one of the following constants defined
+ * in \<stdio.h\> exclusively to be used as arguments for this function (SEEK_SET = beginning of file,
+ * SEEK_CUR = current position of the file pointer, SEEK_END = end of file)
+ */
+void sg_file_seek(sg_file_t fd, sg_offset_t offset, int origin)
+{
+ fd->seek(offset, origin);
+}
+
+sg_size_t sg_file_tell(sg_file_t fd)
+{
+ return fd->tell();
+}
+
+void sg_file_move(sg_file_t fd, const char* fullpath)
+{
+ fd->move(fullpath);
+}
- if (FileSystemStorageExt::EXTENSION_ID.valid())
- return;
+void sg_file_unlink(sg_file_t fd)
+{
+ fd->unlink();
+ delete fd;
+}
- FileSystemStorageExt::EXTENSION_ID = simgrid::s4u::Storage::extension_create<FileSystemStorageExt>();
+/**
+ * \brief Copy a file to another location on a remote host.
+ * \param file : the file to move
+ * \param host : the remote host where the file has to be copied
+ * \param fullpath : the complete path destination on the remote host
+ * \return If successful, the function returns 0. Otherwise, it returns -1.
+ */
+int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
+{
+ return file->remoteCopy(host, fullpath);
+}
- simgrid::s4u::Storage::onCreation.connect(&onStorageCreation);
- simgrid::s4u::Storage::onDestruction.connect(&onStorageDestruction);
+/**
+ * \brief Move a file to another location on a remote host.
+ * \param file : the file to move
+ * \param host : the remote host where the file has to be moved
+ * \param fullpath : the complete path destination on the remote host
+ * \return If successful, the function returns 0. Otherwise, it returns -1.
+ */
+int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
+{
+ return file->remoteMove(host, fullpath);
}
sg_size_t sg_storage_get_size_free(sg_storage_t st)
return st->extension<FileSystemStorageExt>()->getSize();
}
+xbt_dict_t sg_storage_get_content(sg_storage_t storage)
+{
+ std::map<std::string, sg_size_t>* content = storage->extension<simgrid::s4u::FileSystemStorageExt>()->getContent();
+ // Note: ::operator delete is ok here (no destructor called) since the dict elements are of POD type sg_size_t.
+ xbt_dict_t content_as_dict = xbt_dict_new_homogeneous(::operator delete);
+
+ for (auto const& entry : *content) {
+ sg_size_t* psize = new sg_size_t;
+ *psize = entry.second;
+ xbt_dict_set(content_as_dict, entry.first.c_str(), psize, nullptr);
+ }
+ return content_as_dict;
+}
+
+xbt_dict_t sg_host_get_storage_content(sg_host_t host)
+{
+ xbt_assert((host != nullptr), "Invalid parameters");
+ xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
+ for (auto const& elm : host->getMountedStorages())
+ xbt_dict_set(contents, elm.first.c_str(), sg_storage_get_content(elm.second), nullptr);
+
+ return contents;
+}
+
SG_END_DECL()
