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/*
*
* $Id: k3bscsicommand_linux.cpp 679274 2007-06-23 13:23:58Z trueg $
* Copyright (C) 2003-2007 Sebastian Trueg <trueg@k3b.org>
*
* This file is part of the K3b project.
* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
*
* Parts of this file are inspired (and copied) from transport.hxx
* from the dvd+rw-tools (C) Andy Polyakov <appro@fy.chalmers.se>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
* See the file "COPYING" for the exact licensing terms.
*/
#include "k3bscsicommand.h"
#include "k3bdevice.h"
#include <k3bdebug.h>
#include <sys/ioctl.h>
#undef __STRICT_ANSI__
#include <linux/cdrom.h>
#define __STRICT_ANSI__
#include <scsi/sg.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/utsname.h>
#if !defined(SG_FLAG_LUN_INHIBIT)
# if defined(SG_FLAG_UNUSED_LUN_INHIBIT)
# define SG_FLAG_LUN_INHIBIT SG_FLAG_UNUSED_LUN_INHIBIT
# else
# define SG_FLAG_LUN_INHIBIT 0
# endif
#endif
#ifdef SG_IO
static bool useSgIo()
{
struct utsname buf;
uname( &buf );
// was CDROM_SEND_PACKET declared dead in 2.5?
return ( strcmp( buf.release, "2.5.43" ) >=0 );
}
#endif
class K3bDevice::ScsiCommand::Private
{
public:
struct cdrom_generic_command cmd;
struct request_sense sense;
#ifdef SG_IO
bool useSgIo;
struct sg_io_hdr sgIo;
#endif
};
void K3bDevice::ScsiCommand::clear()
{
::memset( &d->cmd, 0, sizeof(struct cdrom_generic_command) );
::memset( &d->sense, 0, sizeof(struct request_sense) );
d->cmd.quiet = 1;
d->cmd.sense = &d->sense;
#ifdef SG_IO
d->useSgIo = useSgIo();
::memset( &d->sgIo, 0, sizeof(struct sg_io_hdr) );
#endif
}
unsigned char& K3bDevice::ScsiCommand::operator[]( size_t i )
{
#ifdef SG_IO
if( d->sgIo.cmd_len < i+1 )
d->sgIo.cmd_len = i+1;
#endif
return d->cmd.cmd[i];
}
int K3bDevice::ScsiCommand::transport( TransportDirection dir,
void* data,
size_t len )
{
bool needToClose = false;
if( m_device ) {
m_device->usageLock();
if( !m_device->isOpen() ) {
needToClose = true;
}
if ( !m_device->open( dir == TR_DIR_WRITE ) ) {
m_device->usageUnlock();
return -1;
}
m_deviceHandle = m_device->handle();
}
if( m_deviceHandle == -1 ) {
return -1;
}
int i = -1;
#ifdef SG_IO
if( d->useSgIo ) {
d->sgIo.interface_id= 'S';
d->sgIo.mx_sb_len = sizeof( struct request_sense );
d->sgIo.cmdp = d->cmd.cmd;
d->sgIo.sbp = (unsigned char*)&d->sense;
d->sgIo.flags = SG_FLAG_LUN_INHIBIT|SG_FLAG_DIRECT_IO;
d->sgIo.dxferp = data;
d->sgIo.dxfer_len = len;
d->sgIo.timeout = 5000;
if( dir == TR_DIR_READ )
d->sgIo.dxfer_direction = SG_DXFER_FROM_DEV;
else if( dir == TR_DIR_WRITE )
d->sgIo.dxfer_direction = SG_DXFER_TO_DEV;
else
d->sgIo.dxfer_direction = SG_DXFER_NONE;
i = ::ioctl( m_deviceHandle, SG_IO, &d->sgIo );
if( ( d->sgIo.info&SG_INFO_OK_MASK ) != SG_INFO_OK )
i = -1;
}
else {
#endif
d->cmd.buffer = (unsigned char*)data;
d->cmd.buflen = len;
if( dir == TR_DIR_READ )
d->cmd.data_direction = CGC_DATA_READ;
else if( dir == TR_DIR_WRITE )
d->cmd.data_direction = CGC_DATA_WRITE;
else
d->cmd.data_direction = CGC_DATA_NONE;
i = ::ioctl( m_deviceHandle, CDROM_SEND_PACKET, &d->cmd );
#ifdef SG_IO
}
#endif
if( needToClose )
m_device->close();
if ( m_device ) {
m_device->usageUnlock();
}
if( i ) {
debugError( d->cmd.cmd[0],
d->sense.error_code,
d->sense.sense_key,
d->sense.asc,
d->sense.ascq );
int errCode =
(d->sense.error_code<<24) & 0xF000 |
(d->sense.sense_key<<16) & 0x0F00 |
(d->sense.asc<<8) & 0x00F0 |
(d->sense.ascq) & 0x000F;
return( errCode != 0 ? errCode : 1 );
}
else
return 0;
}
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