diff options
Diffstat (limited to 'libk3bdevice/k3bscsicommand_linux.cpp')
| -rw-r--r-- | libk3bdevice/k3bscsicommand_linux.cpp | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/libk3bdevice/k3bscsicommand_linux.cpp b/libk3bdevice/k3bscsicommand_linux.cpp new file mode 100644 index 0000000..774da06 --- /dev/null +++ b/libk3bdevice/k3bscsicommand_linux.cpp @@ -0,0 +1,177 @@ +/* + * + * $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; +} |