mirror of
https://github.com/akuker/RASCSI.git
synced 2024-12-22 15:30:09 +00:00
454c61ac0d
* Support for ID and LUN parameter for the -L option in rascsi * Added DeviceLogger class * Removed dupiicate code * Fixed SonarQube issues * Added unit tests, improved code sharing * Fixed regression (#979)
145 lines
4.0 KiB
C++
145 lines
4.0 KiB
C++
//---------------------------------------------------------------------------
|
|
//
|
|
// SCSI Target Emulator RaSCSI Reloaded
|
|
// for Raspberry Pi
|
|
//
|
|
// Copyright (C) 2022 Uwe Seimet
|
|
//
|
|
// A basic device with mode page support, to be used for subclassing
|
|
//
|
|
//---------------------------------------------------------------------------
|
|
|
|
#include "shared/rascsi_exceptions.h"
|
|
#include "scsi_command_util.h"
|
|
#include "mode_page_device.h"
|
|
#include <cstddef>
|
|
#include <sstream>
|
|
#include <iomanip>
|
|
|
|
using namespace std;
|
|
using namespace scsi_defs;
|
|
using namespace scsi_command_util;
|
|
|
|
bool ModePageDevice::Init(const unordered_map<string, string>& params)
|
|
{
|
|
PrimaryDevice::Init(params);
|
|
|
|
AddCommand(scsi_command::eCmdModeSense6, [this] { ModeSense6(); });
|
|
AddCommand(scsi_command::eCmdModeSense10, [this] { ModeSense10(); });
|
|
AddCommand(scsi_command::eCmdModeSelect6, [this] { ModeSelect6(); });
|
|
AddCommand(scsi_command::eCmdModeSelect10, [this] { ModeSelect10(); });
|
|
|
|
return true;
|
|
}
|
|
|
|
int ModePageDevice::AddModePages(const vector<int>& cdb, vector<uint8_t>& buf, int offset, int length, int max_size) const
|
|
{
|
|
const int max_length = length - offset;
|
|
if (max_length < 0) {
|
|
return length;
|
|
}
|
|
|
|
const bool changeable = (cdb[2] & 0xc0) == 0x40;
|
|
|
|
// Get page code (0x3f means all pages)
|
|
const int page = cdb[2] & 0x3f;
|
|
|
|
stringstream s;
|
|
s << "Requesting mode page $" << setfill('0') << setw(2) << hex << page;
|
|
GetLogger().Trace(s.str());
|
|
|
|
// Mode page data mapped to the respective page numbers, C++ maps are ordered by key
|
|
map<int, vector<byte>> pages;
|
|
SetUpModePages(pages, page, changeable);
|
|
|
|
if (pages.empty()) {
|
|
s << "Unsupported mode page $" << page;
|
|
GetLogger().Trace(s.str());
|
|
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
|
}
|
|
|
|
// Holds all mode page data
|
|
vector<byte> result;
|
|
|
|
vector<byte> page0;
|
|
for (const auto& [index, data] : pages) {
|
|
// The specification mandates that page 0 must be returned after all others
|
|
if (index) {
|
|
const size_t off = result.size();
|
|
|
|
// Page data
|
|
result.insert(result.end(), data.begin(), data.end());
|
|
// Page code, PS bit may already have been set
|
|
result[off] |= (byte)index;
|
|
// Page payload size
|
|
result[off + 1] = (byte)(data.size() - 2);
|
|
}
|
|
else {
|
|
page0 = data;
|
|
}
|
|
}
|
|
|
|
// Page 0 must be last
|
|
if (!page0.empty()) {
|
|
const size_t off = result.size();
|
|
|
|
// Page data
|
|
result.insert(result.end(), page0.begin(), page0.end());
|
|
// Page payload size
|
|
result[off + 1] = (byte)(page0.size() - 2);
|
|
}
|
|
|
|
if (static_cast<int>(result.size()) > max_size) {
|
|
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
|
}
|
|
|
|
const auto size = static_cast<int>(min(static_cast<size_t>(max_length), result.size()));
|
|
memcpy(&buf.data()[offset], result.data(), size);
|
|
|
|
// Do not return more than the requested number of bytes
|
|
return size + offset < length ? size + offset : length;
|
|
}
|
|
|
|
void ModePageDevice::ModeSense6() const
|
|
{
|
|
GetController()->SetLength(ModeSense6(GetController()->GetCmd(), GetController()->GetBuffer()));
|
|
|
|
EnterDataInPhase();
|
|
}
|
|
|
|
void ModePageDevice::ModeSense10() const
|
|
{
|
|
GetController()->SetLength(ModeSense10(GetController()->GetCmd(), GetController()->GetBuffer()));
|
|
|
|
EnterDataInPhase();
|
|
}
|
|
|
|
void ModePageDevice::ModeSelect(scsi_command, const vector<int>&, const vector<uint8_t>&, int) const
|
|
{
|
|
// There is no default implementation of MDOE SELECT
|
|
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_COMMAND_OPERATION_CODE);
|
|
}
|
|
|
|
void ModePageDevice::ModeSelect6() const
|
|
{
|
|
SaveParametersCheck(GetController()->GetCmd(4));
|
|
}
|
|
|
|
void ModePageDevice::ModeSelect10() const
|
|
{
|
|
const auto length = min(GetController()->GetBuffer().size(), static_cast<size_t>(GetInt16(GetController()->GetCmd(), 7)));
|
|
|
|
SaveParametersCheck(static_cast<uint32_t>(length));
|
|
}
|
|
|
|
void ModePageDevice::SaveParametersCheck(int length) const
|
|
{
|
|
if (!SupportsSaveParameters() && (GetController()->GetCmd(1) & 0x01)) {
|
|
throw scsi_exception(sense_key::ILLEGAL_REQUEST, asc::INVALID_FIELD_IN_CDB);
|
|
}
|
|
|
|
GetController()->SetLength(length);
|
|
|
|
EnterDataOutPhase();
|
|
}
|