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Implement SCSI commands in Linux.

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This commit is contained in:
Natalia Portillo
2019-10-16 21:53:06 +01:00
parent 71954fd9fa
commit d170083f77
5 changed files with 145 additions and 3 deletions
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4
CMakeLists.txt
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@@ -3,10 +3,10 @@ project(dicremote C)
set(CMAKE_C_STANDARD 90)
set(MAIN_SOURCES main.c list_devices.c device.c)
set(MAIN_SOURCES main.c list_devices.c device.c scsi.c)
if("${CMAKE_SYSTEM}" MATCHES "Linux")
set(PLATFORM_SOURCES linux/list_devices.c linux/linux.h linux/device.c)
set(PLATFORM_SOURCES linux/list_devices.c linux/linux.h linux/device.c linux/scsi.c)
endif()
add_executable(dicremote ${MAIN_SOURCES} ${PLATFORM_SOURCES})

16
dicmote.h
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@@ -63,6 +63,11 @@
#define DICMOTE_DEVICE_TYPE_SECURE_DIGITAL 4
#define DICMOTE_DEVICE_TYPE_MMC 5
#define DICMOTE_DEVICE_TYPE_NVME 6
#define DICMOTE_SCSI_DIRECTION_UNSPECIFIED -1
#define DICMOTE_SCSI_DIRECTION_NONE 0
#define DICMOTE_SCSI_DIRECTION_OUT 1
#define DICMOTE_SCSI_DIRECTION_IN 2
#define DICMOTE_SCSI_DIRECTION_INOUT 3
#pragma pack(push, 1)
@@ -385,5 +390,16 @@ void FreeDeviceInfoList(DeviceInfoList* start);
uint16_t DeviceInfoListCount(DeviceInfoList* start);
int DeviceOpen(const char* devicePath);
int32_t GetDeviceType(const char* devicePath);
int32_t SendScsiCommand(int device_fd,
char* cdb,
char* buffer,
char** senseBuffer,
uint32_t timeout,
int32_t direction,
uint32_t* duration,
uint32_t* sense,
uint32_t cdb_len,
uint32_t* buf_len,
uint32_t* sense_len);
#endif

12
linux/linux.h
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@@ -24,5 +24,15 @@
DeviceInfoList* linux_list_devices();
int linux_open_device(const char* device_path);
int32_t linux_get_device_type(const char* devicePath);
int32_t linux_send_scsi_command(int device_fd,
char* cdb,
char* buffer,
char** senseBuffer,
uint32_t timeout,
int32_t direction,
uint32_t* duration,
uint32_t* sense,
uint32_t cdb_len,
uint32_t* buf_len,
uint32_t* sense_len);
#endif // DICREMOTE_LINUX_H

76
linux/scsi.c Normal file
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@@ -0,0 +1,76 @@
/*
* This file is part of the DiscImageChef Remote Server.
* Copyright (c) 2019 Natalia Portillo.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../dicmote.h"
#include <malloc.h>
#include <scsi/sg.h>
#include <stdint.h>
#include <string.h>
#include <sys/ioctl.h>
int32_t linux_send_scsi_command(int device_fd,
char* cdb,
char* buffer,
char** senseBuffer,
uint32_t timeout,
int32_t direction,
uint32_t* duration,
uint32_t* sense,
uint32_t cdb_len,
uint32_t* buf_len,
uint32_t* sense_len)
{
sg_io_hdr_t hdr;
int dir, ret;
*sense_len = 32;
memset(&hdr, 0, sizeof(sg_io_hdr_t));
*senseBuffer = malloc(*sense_len);
if(!*senseBuffer) return -1;
switch(direction)
{
case DICMOTE_SCSI_DIRECTION_IN: dir = SG_DXFER_FROM_DEV; break;
case DICMOTE_SCSI_DIRECTION_OUT: dir = SG_DXFER_TO_DEV; break;
case DICMOTE_SCSI_DIRECTION_INOUT: dir = SG_DXFER_TO_FROM_DEV; break;
case DICMOTE_SCSI_DIRECTION_NONE:
case DICMOTE_SCSI_DIRECTION_UNSPECIFIED:
default: dir = SG_DXFER_NONE; break;
}
hdr.interface_id = 'S';
hdr.cmd_len = (char)cdb_len;
hdr.mx_sb_len = 32;
hdr.dxfer_direction = dir;
hdr.dxfer_len = *buf_len;
hdr.dxferp = buffer;
hdr.cmdp = (unsigned char*)cdb;
hdr.sbp = (unsigned char*)*senseBuffer;
hdr.timeout = timeout;
hdr.flags = SG_FLAG_DIRECT_IO;
ret = ioctl(device_fd, SG_IO, &hdr);
*sense |= (hdr.info & SG_INFO_OK_MASK) != SG_INFO_OK;
// TODO: Manual timing if duration is 0
*duration = hdr.duration;
*sense_len = hdr.sb_len_wr;
return ret; // TODO: Implement
}

40
scsi.c Normal file
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@@ -0,0 +1,40 @@
/*
* This file is part of the DiscImageChef Remote Server.
* Copyright (c) 2019 Natalia Portillo.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#if defined(__linux__) && !defined(__ANDROID__)
#include "linux/linux.h"
#endif
int32_t SendScsiCommand(int device_fd,
char* cdb,
char* buffer,
char** senseBuffer,
uint32_t timeout,
int32_t direction,
uint32_t* duration,
uint32_t* sense,
uint32_t cdb_len,
uint32_t* buf_len,
uint32_t* sense_len)
{
#if defined(__linux__) && !defined(__ANDROID__)
return linux_send_scsi_command(
device_fd, cdb, buffer, senseBuffer, timeout, direction, duration, sense, cdb_len, buf_len, sense_len);
#else
return -1;
#endif
}