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537 lines
19 KiB
C++
537 lines
19 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator PiSCSI
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// for Raspberry Pi
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//
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// Copyright (C) 2021-2023 Uwe Seimet
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//
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//---------------------------------------------------------------------------
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#include "controllers/controller_manager.h"
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#include "shared/protobuf_util.h"
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#include "shared/network_util.h"
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#include "shared/piscsi_util.h"
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#include "shared/piscsi_version.h"
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#include "devices/disk.h"
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#include "piscsi_response.h"
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#include <spdlog/spdlog.h>
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#include <filesystem>
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using namespace std;
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using namespace filesystem;
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using namespace piscsi_interface;
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using namespace piscsi_util;
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using namespace network_util;
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using namespace protobuf_util;
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void PiscsiResponse::GetDeviceProperties(const Device& device, PbDeviceProperties& properties) const
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{
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properties.set_luns(ControllerManager::GetScsiLunMax());
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properties.set_read_only(device.IsReadOnly());
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properties.set_protectable(device.IsProtectable());
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properties.set_stoppable(device.IsStoppable());
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properties.set_removable(device.IsRemovable());
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properties.set_lockable(device.IsLockable());
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properties.set_supports_file(device.SupportsFile());
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properties.set_supports_params(device.SupportsParams());
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if (device.SupportsParams()) {
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for (const auto& [key, value] : device.GetDefaultParams()) {
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auto& map = *properties.mutable_default_params();
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map[key] = value;
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}
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}
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for (const auto& block_size : device_factory.GetSectorSizes(device.GetType())) {
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properties.add_block_sizes(block_size);
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}
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}
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void PiscsiResponse::GetDeviceTypeProperties(PbDeviceTypesInfo& device_types_info, PbDeviceType type) const
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{
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auto type_properties = device_types_info.add_properties();
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type_properties->set_type(type);
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const auto device = device_factory.CreateDevice(type, 0, "");
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GetDeviceProperties(*device, *type_properties->mutable_properties());
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}
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void PiscsiResponse::GetDeviceTypesInfo(PbDeviceTypesInfo& device_types_info) const
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{
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// Start with 2 instead of 1. 1 was the removed SASI drive type.
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int ordinal = 2;
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while (PbDeviceType_IsValid(ordinal)) {
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PbDeviceType type = UNDEFINED;
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PbDeviceType_Parse(PbDeviceType_Name((PbDeviceType)ordinal), &type);
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GetDeviceTypeProperties(device_types_info, type);
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ordinal++;
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}
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}
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void PiscsiResponse::GetDevice(const Device& device, PbDevice& pb_device, const string& default_folder) const
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{
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pb_device.set_id(device.GetId());
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pb_device.set_unit(device.GetLun());
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pb_device.set_vendor(device.GetVendor());
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pb_device.set_product(device.GetProduct());
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pb_device.set_revision(device.GetRevision());
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pb_device.set_type(device.GetType());
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GetDeviceProperties(device, *pb_device.mutable_properties());
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auto status = pb_device.mutable_status();
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status->set_protected_(device.IsProtected());
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status->set_stopped(device.IsStopped());
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status->set_removed(device.IsRemoved());
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status->set_locked(device.IsLocked());
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if (device.SupportsParams()) {
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for (const auto& [key, value] : device.GetParams()) {
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SetParam(pb_device, key, value);
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}
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}
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if (const auto disk = dynamic_cast<const Disk*>(&device); disk) {
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pb_device.set_block_size(device.IsRemoved()? 0 : disk->GetSectorSizeInBytes());
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pb_device.set_block_count(device.IsRemoved() ? 0: disk->GetBlockCount());
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}
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const auto storage_device = dynamic_cast<const StorageDevice *>(&device);
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if (storage_device != nullptr) {
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GetImageFile(*pb_device.mutable_file(), default_folder, device.IsReady() ? storage_device->GetFilename() : "");
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}
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}
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bool PiscsiResponse::GetImageFile(PbImageFile& image_file, const string& default_folder, const string& filename) const
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{
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if (!filename.empty()) {
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image_file.set_name(filename);
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image_file.set_type(device_factory.GetTypeForFile(filename));
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const path p(filename[0] == '/' ? filename : default_folder + "/" + filename);
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image_file.set_read_only(access(p.c_str(), W_OK));
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error_code error;
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if (is_regular_file(p, error) || (is_symlink(p, error) && !is_block_file(p, error))) {
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image_file.set_size(file_size(p));
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return true;
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}
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}
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return false;
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}
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void PiscsiResponse::GetAvailableImages(PbImageFilesInfo& image_files_info, const string& default_folder,
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const string& folder_pattern, const string& file_pattern, int scan_depth) const
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{
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const path default_path(default_folder);
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if (!is_directory(default_path)) {
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return;
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}
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string folder_pattern_lower;
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ranges::transform(folder_pattern, back_inserter(folder_pattern_lower), ::tolower);
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string file_pattern_lower;
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ranges::transform(file_pattern, back_inserter(file_pattern_lower), ::tolower);
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for (auto it = recursive_directory_iterator(default_path, directory_options::follow_directory_symlink);
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it != recursive_directory_iterator(); it++) {
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if (it.depth() > scan_depth) {
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it.disable_recursion_pending();
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continue;
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}
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const string parent = it->path().parent_path().string();
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const string folder = parent.size() > default_folder.size() ? parent.substr(default_folder.size() + 1) : "";
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if (!FilterMatches(folder, folder_pattern_lower) || !FilterMatches(it->path().filename().string(), file_pattern_lower)) {
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continue;
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}
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if (!ValidateImageFile(it->path())) {
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continue;
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}
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const string filename = folder.empty() ?
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it->path().filename().string() : folder + "/" + it->path().filename().string();
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if (PbImageFile image_file; GetImageFile(image_file, default_folder, filename)) {
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GetImageFile(*image_files_info.add_image_files(), default_folder, filename);
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}
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}
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}
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void PiscsiResponse::GetImageFilesInfo(PbImageFilesInfo& image_files_info, const string& default_folder,
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const string& folder_pattern, const string& file_pattern, int scan_depth) const
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{
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image_files_info.set_default_image_folder(default_folder);
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image_files_info.set_depth(scan_depth);
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GetAvailableImages(image_files_info, default_folder, folder_pattern, file_pattern, scan_depth);
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}
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void PiscsiResponse::GetAvailableImages(PbServerInfo& server_info, const string& default_folder,
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const string& folder_pattern, const string& file_pattern, int scan_depth) const
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{
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server_info.mutable_image_files_info()->set_default_image_folder(default_folder);
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GetImageFilesInfo(*server_info.mutable_image_files_info(), default_folder, folder_pattern, file_pattern, scan_depth);
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}
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void PiscsiResponse::GetReservedIds(PbReservedIdsInfo& reserved_ids_info, const unordered_set<int>& ids) const
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{
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for (const int id : ids) {
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reserved_ids_info.add_ids(id);
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}
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}
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void PiscsiResponse::GetDevices(const unordered_set<shared_ptr<PrimaryDevice>>& devices, PbServerInfo& server_info,
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const string& default_folder) const
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{
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for (const auto& device : devices) {
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PbDevice *pb_device = server_info.mutable_devices_info()->add_devices();
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GetDevice(*device, *pb_device, default_folder);
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}
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}
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void PiscsiResponse::GetDevicesInfo(const unordered_set<shared_ptr<PrimaryDevice>>& devices, PbResult& result,
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const PbCommand& command, const string& default_folder) const
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{
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set<id_set> id_sets;
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// If no device list was provided in the command get information on all devices
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if (!command.devices_size()) {
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for (const auto& device : devices) {
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id_sets.insert({ device->GetId(), device->GetLun() });
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}
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}
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// Otherwise get information on the devices provided in the command
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else {
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id_sets = MatchDevices(devices, result, command);
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if (id_sets.empty()) {
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return;
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}
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}
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auto devices_info = result.mutable_devices_info();
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for (const auto& [id, lun] : id_sets) {
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for (const auto& d : devices) {
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if (d->GetId() == id && d->GetLun() == lun) {
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GetDevice(*d, *devices_info->add_devices(), default_folder);
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break;
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}
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}
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}
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result.set_status(true);
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}
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void PiscsiResponse::GetServerInfo(PbServerInfo& server_info, const PbCommand& command,
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const unordered_set<shared_ptr<PrimaryDevice>>& devices, const unordered_set<int>& reserved_ids,
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const string& default_folder, int scan_depth) const
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{
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const vector<string> command_operations = Split(GetParam(command, "operations"), ',');
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set<string, less<>> operations;
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for (const string& operation : command_operations) {
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string op;
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ranges::transform(operation, back_inserter(op), ::toupper);
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operations.insert(op);
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}
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if (!operations.empty()) {
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spdlog::trace("Requested operation(s): " + Join(operations, ","));
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}
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if (HasOperation(operations, PbOperation::VERSION_INFO)) {
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GetVersionInfo(*server_info.mutable_version_info());
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}
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if (HasOperation(operations, PbOperation::LOG_LEVEL_INFO)) {
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GetLogLevelInfo(*server_info.mutable_log_level_info());
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}
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if (HasOperation(operations, PbOperation::DEVICE_TYPES_INFO)) {
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GetDeviceTypesInfo(*server_info.mutable_device_types_info());
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}
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if (HasOperation(operations, PbOperation::DEFAULT_IMAGE_FILES_INFO)) {
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GetAvailableImages(server_info, default_folder, GetParam(command, "folder_pattern"),
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GetParam(command, "file_pattern"), scan_depth);
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}
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if (HasOperation(operations, PbOperation::NETWORK_INTERFACES_INFO)) {
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GetNetworkInterfacesInfo(*server_info.mutable_network_interfaces_info());
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}
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if (HasOperation(operations, PbOperation::MAPPING_INFO)) {
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GetMappingInfo(*server_info.mutable_mapping_info());
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}
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if (HasOperation(operations, PbOperation::STATISTICS_INFO)) {
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GetStatisticsInfo(*server_info.mutable_statistics_info(), devices);
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}
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if (HasOperation(operations, PbOperation::DEVICES_INFO)) {
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GetDevices(devices, server_info, default_folder);
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}
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if (HasOperation(operations, PbOperation::RESERVED_IDS_INFO)) {
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GetReservedIds(*server_info.mutable_reserved_ids_info(), reserved_ids);
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}
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if (HasOperation(operations, PbOperation::OPERATION_INFO)) {
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GetOperationInfo(*server_info.mutable_operation_info(), scan_depth);
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}
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}
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void PiscsiResponse::GetVersionInfo(PbVersionInfo& version_info) const
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{
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version_info.set_major_version(piscsi_major_version);
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version_info.set_minor_version(piscsi_minor_version);
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version_info.set_patch_version(piscsi_patch_version);
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}
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void PiscsiResponse::GetLogLevelInfo(PbLogLevelInfo& log_level_info) const
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{
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for (const auto& log_level : spdlog::level::level_string_views) {
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log_level_info.add_log_levels(log_level.data());
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}
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log_level_info.set_current_log_level(spdlog::level::level_string_views[spdlog::get_level()].data());
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}
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void PiscsiResponse::GetNetworkInterfacesInfo(PbNetworkInterfacesInfo& network_interfaces_info) const
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{
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for (const auto& network_interface : GetNetworkInterfaces()) {
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network_interfaces_info.add_name(network_interface);
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}
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}
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void PiscsiResponse::GetMappingInfo(PbMappingInfo& mapping_info) const
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{
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for (const auto& [name, type] : device_factory.GetExtensionMapping()) {
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(*mapping_info.mutable_mapping())[name] = type;
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}
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}
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void PiscsiResponse::GetStatisticsInfo(PbStatisticsInfo& statistics_info,
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const unordered_set<shared_ptr<PrimaryDevice>>& devices) const
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{
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for (const auto& device : devices) {
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for (const auto& statistics : device->GetStatistics()) {
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auto s = statistics_info.add_statistics();
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s->set_id(statistics.id());
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s->set_unit(statistics.unit());
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s->set_category(statistics.category());
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s->set_key(statistics.key());
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s->set_value(statistics.value());
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}
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}
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}
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void PiscsiResponse::GetOperationInfo(PbOperationInfo& operation_info, int depth) const
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{
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auto operation = CreateOperation(operation_info, ATTACH, "Attach device, device-specific parameters are required");
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AddOperationParameter(*operation, "name", "Image file name in case of a mass storage device");
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AddOperationParameter(*operation, "interface", "Comma-separated prioritized network interface list");
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AddOperationParameter(*operation, "inet", "IP address and netmask of the network bridge");
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AddOperationParameter(*operation, "cmd", "Print command for the printer device");
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CreateOperation(operation_info, DETACH, "Detach device, device-specific parameters are required");
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CreateOperation(operation_info, DETACH_ALL, "Detach all devices");
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CreateOperation(operation_info, START, "Start device, device-specific parameters are required");
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CreateOperation(operation_info, STOP, "Stop device, device-specific parameters are required");
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operation = CreateOperation(operation_info, INSERT, "Insert medium, device-specific parameters are required");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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CreateOperation(operation_info, EJECT, "Eject medium, device-specific parameters are required");
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CreateOperation(operation_info, PROTECT, "Protect medium, device-specific parameters are required");
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CreateOperation(operation_info, UNPROTECT, "Unprotect medium, device-specific parameters are required");
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operation = CreateOperation(operation_info, SERVER_INFO, "Get piscsi server information");
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if (depth) {
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AddOperationParameter(*operation, "folder_pattern", "Pattern for filtering image folder names");
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}
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AddOperationParameter(*operation, "file_pattern", "Pattern for filtering image file names");
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CreateOperation(operation_info, VERSION_INFO, "Get piscsi server version");
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CreateOperation(operation_info, DEVICES_INFO, "Get information on attached devices");
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CreateOperation(operation_info, DEVICE_TYPES_INFO, "Get device properties by device type");
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operation = CreateOperation(operation_info, DEFAULT_IMAGE_FILES_INFO, "Get information on available image files");
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if (depth) {
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AddOperationParameter(*operation, "folder_pattern", "Pattern for filtering image folder names");
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}
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AddOperationParameter(*operation, "file_pattern", "Pattern for filtering image file names");
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operation = CreateOperation(operation_info, IMAGE_FILE_INFO, "Get information on image file");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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CreateOperation(operation_info, LOG_LEVEL_INFO, "Get log level information");
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CreateOperation(operation_info, NETWORK_INTERFACES_INFO, "Get the available network interfaces");
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CreateOperation(operation_info, MAPPING_INFO, "Get mapping of extensions to device types");
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CreateOperation(operation_info, STATISTICS_INFO, "Get statistics");
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CreateOperation(operation_info, RESERVED_IDS_INFO, "Get list of reserved device IDs");
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operation = CreateOperation(operation_info, DEFAULT_FOLDER, "Set default image file folder");
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AddOperationParameter(*operation, "folder", "Default image file folder name", "", true);
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operation = CreateOperation(operation_info, LOG_LEVEL, "Set log level");
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AddOperationParameter(*operation, "level", "New log level", "", true);
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operation = CreateOperation(operation_info, RESERVE_IDS, "Reserve device IDs");
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AddOperationParameter(*operation, "ids", "Comma-separated device ID list", "", true);
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operation = CreateOperation(operation_info, SHUT_DOWN, "Shut down or reboot");
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if (getuid()) {
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AddOperationParameter(*operation, "mode", "Shutdown mode", "", true, { "rascsi" } );
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}
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else {
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// System shutdown/reboot requires root permissions
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AddOperationParameter(*operation, "mode", "Shutdown mode", "", true, { "rascsi", "system", "reboot" } );
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}
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operation = CreateOperation(operation_info, CREATE_IMAGE, "Create an image file");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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AddOperationParameter(*operation, "size", "Image file size in bytes", "", true);
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AddOperationParameter(*operation, "read_only", "Read-only flag", "false", false, { "true", "false" } );
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operation = CreateOperation(operation_info, DELETE_IMAGE, "Delete image file");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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operation = CreateOperation(operation_info, RENAME_IMAGE, "Rename image file");
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AddOperationParameter(*operation, "from", "Source image file name", "", true);
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AddOperationParameter(*operation, "to", "Destination image file name", "", true);
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operation = CreateOperation(operation_info, COPY_IMAGE, "Copy image file");
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AddOperationParameter(*operation, "from", "Source image file name", "", true);
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AddOperationParameter(*operation, "to", "Destination image file name", "", true);
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AddOperationParameter(*operation, "read_only", "Read-only flag", "false", false, { "true", "false" } );
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operation = CreateOperation(operation_info, PROTECT_IMAGE, "Write-protect image file");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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operation = CreateOperation(operation_info, UNPROTECT_IMAGE, "Make image file writable");
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AddOperationParameter(*operation, "file", "Image file name", "", true);
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operation = CreateOperation(operation_info, CHECK_AUTHENTICATION, "Check whether an authentication token is valid");
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AddOperationParameter(*operation, "token", "Authentication token to be checked", "", true);
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CreateOperation(operation_info, OPERATION_INFO, "Get operation meta data");
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}
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// This method returns a raw pointer because protobuf does not have support for smart pointers
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PbOperationMetaData *PiscsiResponse::CreateOperation(PbOperationInfo& operation_info, const PbOperation& operation,
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const string& description) const
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{
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PbOperationMetaData meta_data;
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meta_data.set_server_side_name(PbOperation_Name(operation));
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meta_data.set_description(description);
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int ordinal = PbOperation_descriptor()->FindValueByName(PbOperation_Name(operation))->index();
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(*operation_info.mutable_operations())[ordinal] = meta_data;
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return &(*operation_info.mutable_operations())[ordinal];
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}
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void PiscsiResponse::AddOperationParameter(PbOperationMetaData& meta_data, const string& name,
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const string& description, const string& default_value, bool is_mandatory,
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const vector<string>& permitted_values) const
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{
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auto parameter = meta_data.add_parameters();
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parameter->set_name(name);
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parameter->set_description(description);
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parameter->set_default_value(default_value);
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parameter->set_is_mandatory(is_mandatory);
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for (const auto& permitted_value : permitted_values) {
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parameter->add_permitted_values(permitted_value);
|
|
}
|
|
}
|
|
|
|
set<id_set> PiscsiResponse::MatchDevices(const unordered_set<shared_ptr<PrimaryDevice>>& devices, PbResult& result,
|
|
const PbCommand& command) const
|
|
{
|
|
set<id_set> id_sets;
|
|
|
|
for (const auto& device : command.devices()) {
|
|
bool has_device = false;
|
|
for (const auto& d : devices) {
|
|
if (d->GetId() == device.id() && d->GetLun() == device.unit()) {
|
|
id_sets.insert({ device.id(), device.unit() });
|
|
has_device = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!has_device) {
|
|
id_sets.clear();
|
|
|
|
result.set_status(false);
|
|
result.set_msg("No device for " + to_string(device.id()) + ":" + to_string(device.unit()));
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
return id_sets;
|
|
}
|
|
|
|
bool PiscsiResponse::ValidateImageFile(const path& path)
|
|
{
|
|
if (path.filename().string().starts_with(".")) {
|
|
return false;
|
|
}
|
|
|
|
filesystem::path p(path);
|
|
|
|
// Follow symlink
|
|
if (is_symlink(p)) {
|
|
p = read_symlink(p);
|
|
if (!exists(p)) {
|
|
spdlog::warn("Image file symlink '" + path.string() + "' is broken");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (is_directory(p) || (is_other(p) && !is_block_file(p))) {
|
|
return false;
|
|
}
|
|
|
|
if (!is_block_file(p) && file_size(p) < 256) {
|
|
spdlog::warn("Image file '" + p.string() + "' is invalid");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool PiscsiResponse::FilterMatches(const string& input, string_view pattern_lower)
|
|
{
|
|
if (!pattern_lower.empty()) {
|
|
string name_lower;
|
|
ranges::transform(input, back_inserter(name_lower), ::tolower);
|
|
|
|
if (name_lower.find(pattern_lower) == string::npos) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool PiscsiResponse::HasOperation(const set<string, less<>>& operations, PbOperation operation)
|
|
{
|
|
return operations.empty() || operations.contains(PbOperation_Name(operation));
|
|
}
|