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