[mirror_smartmontools-debian.git] / dev_interface.cpp

/*
 * dev_interface.cpp
 *
 * Home page of code is: http://www.smartmontools.org
 *
 * Copyright (C) 2008-13 Christian Franke <smartmontools-support@lists.sourceforge.net>
 *
 * 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, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "config.h"
#include "int64.h"
#include "dev_interface.h"
#include "dev_tunnelled.h"
#include "atacmds.h" // ATA_SMART_CMD/STATUS
#include "utility.h"

#include <errno.h>
#include <stdarg.h>
#include <stdexcept>

#if defined(HAVE_GETTIMEOFDAY)
#include <sys/time.h>
#elif defined(HAVE_FTIME)
#include <sys/timeb.h>
#endif

const char * dev_interface_cpp_cvsid = "$Id: dev_interface.cpp 4120 2015-08-27 16:12:21Z samm2 $"
  DEV_INTERFACE_H_CVSID;

/////////////////////////////////////////////////////////////////////////////
// smart_device

smart_device::smart_device(smart_interface * intf, const char * dev_name,
    const char * dev_type, const char * req_type)
: m_intf(intf), m_info(dev_name, dev_type, req_type),
  m_ata_ptr(0), m_scsi_ptr(0)
{
}

smart_device::smart_device(do_not_use_in_implementation_classes)
: m_intf(0), m_ata_ptr(0), m_scsi_ptr(0)
{
  throw std::logic_error("smart_device: wrong constructor called in implementation class");
}

smart_device::~smart_device() throw()
{
}

bool smart_device::is_syscall_unsup() const
{
  if (get_errno() == ENOSYS)
    return true;
#ifdef ENOTSUP
  if (get_errno() == ENOTSUP)
    return true;
#endif
  return false;
}

bool smart_device::set_err(int no, const char * msg, ...)
{
  if (!msg)
    return set_err(no);
  m_err.no = no;
  va_list ap; va_start(ap, msg);
  m_err.msg = vstrprintf(msg, ap);
  va_end(ap);
  return false;
}

bool smart_device::set_err(int no)
{
  return smi()->set_err_var(&m_err, no);
}

smart_device * smart_device::autodetect_open()
{
  open();
  return this;
}

bool smart_device::owns(const smart_device * /*dev*/) const
{
  return false;
}

void smart_device::release(const smart_device * /*dev*/)
{
}


/////////////////////////////////////////////////////////////////////////////
// ata_device

ata_in_regs_48bit::ata_in_regs_48bit()
: features_16(features, prev.features),
  sector_count_16(sector_count, prev.sector_count),
  lba_low_16(lba_low, prev.lba_low),
  lba_mid_16(lba_mid, prev.lba_mid),
  lba_high_16(lba_high, prev.lba_high),
  lba_48(     lba_low,      lba_mid,      lba_high,
         prev.lba_low, prev.lba_mid, prev.lba_high)
{
}

ata_out_regs_48bit::ata_out_regs_48bit()
: sector_count_16(sector_count, prev.sector_count),
  lba_low_16(lba_low, prev.lba_low),
  lba_mid_16(lba_mid, prev.lba_mid),
  lba_high_16(lba_high, prev.lba_high),
  lba_48(     lba_low,      lba_mid,      lba_high,
         prev.lba_low, prev.lba_mid, prev.lba_high)
{
}

ata_cmd_in::ata_cmd_in()
: direction(no_data),
  buffer(0),
  size(0)
{
}

ata_cmd_out::ata_cmd_out()
{
}

bool ata_device::ata_pass_through(const ata_cmd_in & in)
{
  ata_cmd_out dummy;
  return ata_pass_through(in, dummy);
}

bool ata_device::ata_cmd_is_supported(const ata_cmd_in & in,
  unsigned flags, const char * type /* = 0 */)
{
  // Check DATA IN/OUT
  switch (in.direction) {
    case ata_cmd_in::no_data:  break;
    case ata_cmd_in::data_in:  break;
    case ata_cmd_in::data_out: break;
    default:
      return set_err(EINVAL, "Invalid data direction %d", (int)in.direction);
  }

  // Check buffer size
  if (in.direction == ata_cmd_in::no_data) {
    if (in.size)
      return set_err(EINVAL, "Buffer size %u > 0 for NO DATA command", in.size);
  }
  else {
    if (!in.buffer)
      return set_err(EINVAL, "Buffer not set for DATA IN/OUT command");
    unsigned count = (in.in_regs.prev.sector_count<<16)|in.in_regs.sector_count;
    // TODO: Add check for sector count == 0
    if (count * 512 != in.size)
      return set_err(EINVAL, "Sector count %u does not match buffer size %u", count, in.size);
  }

  // Check features
  const char * errmsg = 0;
  if (in.direction == ata_cmd_in::data_out && !(flags & supports_data_out))
    errmsg = "DATA OUT ATA commands not implemented";
  else if (   in.out_needed.is_set() && !(flags & supports_output_regs)
           && !(   in.in_regs.command == ATA_SMART_CMD
                && in.in_regs.features == ATA_SMART_STATUS
                && (flags & supports_smart_status)))
    errmsg = "Read of ATA output registers not implemented";
  else if (!(in.size == 0 || in.size == 512) && !(flags & supports_multi_sector))
    errmsg = "Multi-sector ATA commands not implemented";
  else if (in.in_regs.is_48bit_cmd() && !(flags & (supports_48bit_hi_null|supports_48bit)))
    errmsg = "48-bit ATA commands not implemented";
  else if (in.in_regs.is_real_48bit_cmd() && !(flags & supports_48bit))
    errmsg = "48-bit ATA commands not fully implemented";

  if (errmsg)
    return set_err(ENOSYS, "%s%s%s%s", errmsg,
                   (type ? " [" : ""), (type ? type : ""), (type ? "]" : ""));

  return true;
}

bool ata_device::ata_identify_is_cached() const
{
  return false;
}


/////////////////////////////////////////////////////////////////////////////
// tunnelled_device_base

tunnelled_device_base::tunnelled_device_base(smart_device * tunnel_dev)
: smart_device(never_called),
  m_tunnel_base_dev(tunnel_dev)
{
}

tunnelled_device_base::~tunnelled_device_base() throw()
{
  delete m_tunnel_base_dev;
}

bool tunnelled_device_base::is_open() const
{
  return (m_tunnel_base_dev && m_tunnel_base_dev->is_open());
}

bool tunnelled_device_base::open()
{
  if (!m_tunnel_base_dev)
    return set_err(ENOSYS);
  if (!m_tunnel_base_dev->open())
    return set_err(m_tunnel_base_dev->get_err());
  return true;
}

bool tunnelled_device_base::close()
{
  if (!m_tunnel_base_dev)
    return true;
  if (!m_tunnel_base_dev->close())
    return set_err(m_tunnel_base_dev->get_err());
  return true;
}

bool tunnelled_device_base::owns(const smart_device * dev) const
{
  return (m_tunnel_base_dev && (m_tunnel_base_dev == dev));
}

void tunnelled_device_base::release(const smart_device * dev)
{
  if (m_tunnel_base_dev == dev)
    m_tunnel_base_dev = 0;
}


/////////////////////////////////////////////////////////////////////////////
// smart_interface

// Pointer to (usually singleton) interface object returned by ::smi()
smart_interface * smart_interface::s_instance;

std::string smart_interface::get_os_version_str()
{
  return SMARTMONTOOLS_BUILD_HOST;
}

std::string smart_interface::get_valid_dev_types_str()
{
  // default
  std::string s =
    "ata, scsi, sat[,auto][,N][+TYPE], usbcypress[,X], usbjmicron[,p][,x][,N], usbsunplus";
  // append custom
  std::string s2 = get_valid_custom_dev_types_str();
  if (!s2.empty()) {
    s += ", "; s += s2;
  }
  return s;
}

std::string smart_interface::get_app_examples(const char * /*appname*/)
{
  return "";
}

int64_t smart_interface::get_timer_usec()
{
#if defined(HAVE_GETTIMEOFDAY)
 #if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
  {
    static bool have_clock_monotonic = true;
    if (have_clock_monotonic) {
      struct timespec ts;
      if (!clock_gettime(CLOCK_MONOTONIC, &ts))
        return ts.tv_sec * 1000000LL + ts.tv_nsec/1000;
      have_clock_monotonic = false;
    }
  }
 #endif
  {
    struct timeval tv;
    gettimeofday(&tv, 0);
    return tv.tv_sec * 1000000LL + tv.tv_usec;
  }
#elif defined(HAVE_FTIME)
  {
    struct timeb tb;
    ftime(&tb);
    return tb.time * 1000000LL + tb.millitm * 1000;
  }
#else
  return -1;
#endif
}

bool smart_interface::disable_system_auto_standby(bool /*disable*/)
{
  return set_err(ENOSYS);
}

bool smart_interface::set_err(int no, const char * msg, ...)
{
  if (!msg)
    return set_err(no);
  m_err.no = no;
  va_list ap; va_start(ap, msg);
  m_err.msg = vstrprintf(msg, ap);
  va_end(ap);
  return false;
}

bool smart_interface::set_err(int no)
{
  return set_err_var(&m_err, no);
}

bool smart_interface::set_err_var(smart_device::error_info * err, int no)
{
  err->no = no;
  err->msg = get_msg_for_errno(no);
  if (err->msg.empty() && no != 0)
    err->msg = strprintf("Unknown error %d", no);
  return false;
}

const char * smart_interface::get_msg_for_errno(int no)
{
  return strerror(no);
}


/////////////////////////////////////////////////////////////////////////////
// Default device factory

smart_device * smart_interface::get_smart_device(const char * name, const char * type)
{
  clear_err();

  // Call platform specific autodetection if no device type specified
  smart_device * dev;
  if (!type || !*type) {
    dev = autodetect_smart_device(name);
    if (!dev && !get_errno())
      set_err(EINVAL, "Unable to detect device type");
    return dev;
  }

  // First check for platform specific device types
  dev = get_custom_smart_device(name, type);
  if (dev || get_errno())
    return dev;

  if (!strcmp(type, "ata"))
    dev = get_ata_device(name, type);
  else if (!strcmp(type, "scsi"))
    dev = get_scsi_device(name, type);

  else if (  ((!strncmp(type, "sat", 3) && (!type[3] || strchr(",+", type[3])))
           || (!strncmp(type, "usb", 3)))) {
    // Split "sat...+base..." -> ("sat...", "base...")
    unsigned satlen = strcspn(type, "+");
    std::string sattype(type, satlen);
    const char * basetype = (type[satlen] ? type+satlen+1 : "");
    // Recurse to allocate base device, default is standard SCSI
    if (!*basetype)
      basetype = "scsi";
    smart_device_auto_ptr basedev( get_smart_device(name, basetype) );
    if (!basedev) {
      set_err(EINVAL, "Type '%s+...': %s", sattype.c_str(), get_errmsg());
      return 0;
    }
    // Result must be SCSI
    if (!basedev->is_scsi()) {
      set_err(EINVAL, "Type '%s+...': Device type '%s' is not SCSI", sattype.c_str(), basetype);
      return 0;
    }
    // Attach SAT tunnel
    ata_device * satdev = get_sat_device(sattype.c_str(), basedev->to_scsi());
    if (!satdev)
      return 0;
    basedev.release();
    return satdev;
  }

  else {
    set_err(EINVAL, "Unknown device type '%s'", type);
    return 0;
  }
  if (!dev && !get_errno())
    set_err(EINVAL, "Not a device of type '%s'", type);
  return dev;
}

smart_device * smart_interface::get_custom_smart_device(const char * /*name*/, const char * /*type*/)
{
  return 0;
}

std::string smart_interface::get_valid_custom_dev_types_str()
{
  return "";
}
Commit	Line	Data
2127e193 GI	1	/*
	2	* dev_interface.cpp
	3	*
6b80b4d2	4	* Home page of code is: http://www.smartmontools.org
2127e193	5	*
ee38a438	6	* Copyright (C) 2008-13 Christian Franke <smartmontools-support@lists.sourceforge.net>
2127e193 GI	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2, or (at your option)
	11	* any later version.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* (for example COPYING); If not, see <http://www.gnu.org/licenses/>.
	15	*
	16	*/
	17
	18	#include "config.h"
	19	#include "int64.h"
2127e193 GI	20	#include "dev_interface.h"
2127e193 GI	21	#include "dev_tunnelled.h"
ee38a438	22	#include "atacmds.h" // ATA_SMART_CMD/STATUS
2127e193 GI	23	#include "utility.h"
2127e193 GI	24
cfbba5b9 GI	25	#include <errno.h>
cfbba5b9 GI	26	#include <stdarg.h>
2127e193 GI	27	#include <stdexcept>
2127e193 GI	28
e165493d GI	29	#if defined(HAVE_GETTIMEOFDAY)
	30	#include <sys/time.h>
	31	#elif defined(HAVE_FTIME)
	32	#include <sys/timeb.h>
	33	#endif
	34
6b80b4d2	35	const char * dev_interface_cpp_cvsid = "$Id: dev_interface.cpp 4120 2015-08-27 16:12:21Z samm2 $"
2127e193 GI	36	DEV_INTERFACE_H_CVSID;
	37
	38	/////////////////////////////////////////////////////////////////////////////
	39	// smart_device
	40
	41	smart_device::smart_device(smart_interface * intf, const char * dev_name,
	42	const char * dev_type, const char * req_type)
	43	: m_intf(intf), m_info(dev_name, dev_type, req_type),
	44	m_ata_ptr(0), m_scsi_ptr(0)
	45	{
	46	}
	47
	48	smart_device::smart_device(do_not_use_in_implementation_classes)
	49	: m_intf(0), m_ata_ptr(0), m_scsi_ptr(0)
	50	{
	51	throw std::logic_error("smart_device: wrong constructor called in implementation class");
	52	}
	53
	54	smart_device::~smart_device() throw()
	55	{
	56	}
	57
f4e463df GI	58	bool smart_device::is_syscall_unsup() const
	59	{
	60	if (get_errno() == ENOSYS)
	61	return true;
	62	#ifdef ENOTSUP
	63	if (get_errno() == ENOTSUP)
	64	return true;
	65	#endif
	66	return false;
	67	}
	68
2127e193 GI	69	bool smart_device::set_err(int no, const char * msg, ...)
	70	{
	71	if (!msg)
	72	return set_err(no);
	73	m_err.no = no;
	74	va_list ap; va_start(ap, msg);
	75	m_err.msg = vstrprintf(msg, ap);
	76	va_end(ap);
	77	return false;
	78	}
	79
	80	bool smart_device::set_err(int no)
	81	{
d008864d	82	return smi()->set_err_var(&m_err, no);
2127e193 GI	83	}
	84
	85	smart_device * smart_device::autodetect_open()
	86	{
	87	open();
	88	return this;
	89	}
	90
	91	bool smart_device::owns(const smart_device * /dev/) const
	92	{
	93	return false;
	94	}
	95
	96	void smart_device::release(const smart_device * /dev/)
	97	{
	98	}
	99
	100
	101	/////////////////////////////////////////////////////////////////////////////
	102	// ata_device
	103
	104	ata_in_regs_48bit::ata_in_regs_48bit()
	105	: features_16(features, prev.features),
	106	sector_count_16(sector_count, prev.sector_count),
	107	lba_low_16(lba_low, prev.lba_low),
	108	lba_mid_16(lba_mid, prev.lba_mid),
a23d5117 GI	109	lba_high_16(lba_high, prev.lba_high),
	110	lba_48( lba_low, lba_mid, lba_high,
	111	prev.lba_low, prev.lba_mid, prev.lba_high)
2127e193 GI	112	{
	113	}
	114
	115	ata_out_regs_48bit::ata_out_regs_48bit()
	116	: sector_count_16(sector_count, prev.sector_count),
	117	lba_low_16(lba_low, prev.lba_low),
	118	lba_mid_16(lba_mid, prev.lba_mid),
a23d5117 GI	119	lba_high_16(lba_high, prev.lba_high),
	120	lba_48( lba_low, lba_mid, lba_high,
	121	prev.lba_low, prev.lba_mid, prev.lba_high)
2127e193 GI	122	{
	123	}
	124
	125	ata_cmd_in::ata_cmd_in()
	126	: direction(no_data),
	127	buffer(0),
	128	size(0)
	129	{
	130	}
	131
	132	ata_cmd_out::ata_cmd_out()
	133	{
	134	}
	135
	136	bool ata_device::ata_pass_through(const ata_cmd_in & in)
	137	{
	138	ata_cmd_out dummy;
	139	return ata_pass_through(in, dummy);
	140	}
	141
ee38a438 GI	142	bool ata_device::ata_cmd_is_supported(const ata_cmd_in & in,
ee38a438 GI	143	unsigned flags, const char * type /* = 0 */)
2127e193 GI	144	{
	145	// Check DATA IN/OUT
	146	switch (in.direction) {
	147	case ata_cmd_in::no_data: break;
	148	case ata_cmd_in::data_in: break;
	149	case ata_cmd_in::data_out: break;
	150	default:
	151	return set_err(EINVAL, "Invalid data direction %d", (int)in.direction);
	152	}
	153
	154	// Check buffer size
	155	if (in.direction == ata_cmd_in::no_data) {
	156	if (in.size)
	157	return set_err(EINVAL, "Buffer size %u > 0 for NO DATA command", in.size);
	158	}
	159	else {
	160	if (!in.buffer)
	161	return set_err(EINVAL, "Buffer not set for DATA IN/OUT command");
	162	unsigned count = (in.in_regs.prev.sector_count<<16)\|in.in_regs.sector_count;
	163	// TODO: Add check for sector count == 0
	164	if (count * 512 != in.size)
	165	return set_err(EINVAL, "Sector count %u does not match buffer size %u", count, in.size);
	166	}
	167
	168	// Check features
ee38a438 GI	169	const char * errmsg = 0;
	170	if (in.direction == ata_cmd_in::data_out && !(flags & supports_data_out))
	171	errmsg = "DATA OUT ATA commands not implemented";
	172	else if ( in.out_needed.is_set() && !(flags & supports_output_regs)
	173	&& !( in.in_regs.command == ATA_SMART_CMD
	174	&& in.in_regs.features == ATA_SMART_STATUS
	175	&& (flags & supports_smart_status)))
	176	errmsg = "Read of ATA output registers not implemented";
	177	else if (!(in.size == 0 \|\| in.size == 512) && !(flags & supports_multi_sector))
	178	errmsg = "Multi-sector ATA commands not implemented";
	179	else if (in.in_regs.is_48bit_cmd() && !(flags & (supports_48bit_hi_null\|supports_48bit)))
	180	errmsg = "48-bit ATA commands not implemented";
	181	else if (in.in_regs.is_real_48bit_cmd() && !(flags & supports_48bit))
	182	errmsg = "48-bit ATA commands not fully implemented";
	183
	184	if (errmsg)
	185	return set_err(ENOSYS, "%s%s%s%s", errmsg,
	186	(type ? " [" : ""), (type ? type : ""), (type ? "]" : ""));
	187
2127e193 GI	188	return true;
	189	}
	190
	191	bool ata_device::ata_identify_is_cached() const
	192	{
	193	return false;
	194	}
	195
	196
	197	/////////////////////////////////////////////////////////////////////////////
	198	// tunnelled_device_base
	199
	200	tunnelled_device_base::tunnelled_device_base(smart_device * tunnel_dev)
	201	: smart_device(never_called),
	202	m_tunnel_base_dev(tunnel_dev)
	203	{
	204	}
	205
	206	tunnelled_device_base::~tunnelled_device_base() throw()
	207	{
	208	delete m_tunnel_base_dev;
	209	}
	210
	211	bool tunnelled_device_base::is_open() const
	212	{
	213	return (m_tunnel_base_dev && m_tunnel_base_dev->is_open());
	214	}
	215
	216	bool tunnelled_device_base::open()
	217	{
	218	if (!m_tunnel_base_dev)
	219	return set_err(ENOSYS);
	220	if (!m_tunnel_base_dev->open())
	221	return set_err(m_tunnel_base_dev->get_err());
	222	return true;
	223	}
	224
	225	bool tunnelled_device_base::close()
	226	{
	227	if (!m_tunnel_base_dev)
	228	return true;
	229	if (!m_tunnel_base_dev->close())
	230	return set_err(m_tunnel_base_dev->get_err());
	231	return true;
	232	}
	233
	234	bool tunnelled_device_base::owns(const smart_device * dev) const
	235	{
	236	return (m_tunnel_base_dev && (m_tunnel_base_dev == dev));
	237	}
	238
	239	void tunnelled_device_base::release(const smart_device * dev)
	240	{
	241	if (m_tunnel_base_dev == dev)
	242	m_tunnel_base_dev = 0;
	243	}
	244
	245
	246	/////////////////////////////////////////////////////////////////////////////
	247	// smart_interface
	248
	249	// Pointer to (usually singleton) interface object returned by ::smi()
	250	smart_interface * smart_interface::s_instance;
	251
54965743	252	std::string smart_interface::get_os_version_str()
2127e193 GI	253	{
	254	return SMARTMONTOOLS_BUILD_HOST;
	255	}
	256
54965743	257	std::string smart_interface::get_valid_dev_types_str()
2127e193	258	{
2127e193	259	// default
54965743	260	std::string s =
ee38a438	261	"ata, scsi, sat[,auto][,N][+TYPE], usbcypress[,X], usbjmicron[,p][,x][,N], usbsunplus";
2127e193	262	// append custom
54965743 GI	263	std::string s2 = get_valid_custom_dev_types_str();
	264	if (!s2.empty()) {
	265	s += ", "; s += s2;
	266	}
	267	return s;
2127e193 GI	268	}
2127e193 GI	269
54965743	270	std::string smart_interface::get_app_examples(const char * /appname/)
2127e193	271	{
54965743	272	return "";
2127e193 GI	273	}
2127e193 GI	274
e165493d GI	275	int64_t smart_interface::get_timer_usec()
	276	{
	277	#if defined(HAVE_GETTIMEOFDAY)
	278	#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
	279	{
	280	static bool have_clock_monotonic = true;
	281	if (have_clock_monotonic) {
	282	struct timespec ts;
	283	if (!clock_gettime(CLOCK_MONOTONIC, &ts))
	284	return ts.tv_sec * 1000000LL + ts.tv_nsec/1000;
	285	have_clock_monotonic = false;
	286	}
	287	}
	288	#endif
	289	{
	290	struct timeval tv;
	291	gettimeofday(&tv, 0);
	292	return tv.tv_sec * 1000000LL + tv.tv_usec;
	293	}
	294	#elif defined(HAVE_FTIME)
	295	{
	296	struct timeb tb;
	297	ftime(&tb);
	298	return tb.time * 1000000LL + tb.millitm * 1000;
	299	}
	300	#else
	301	return -1;
	302	#endif
	303	}
	304
d008864d	305	bool smart_interface::disable_system_auto_standby(bool /disable/)
2127e193	306	{
d008864d GI	307	return set_err(ENOSYS);
	308	}
	309
	310	bool smart_interface::set_err(int no, const char * msg, ...)
	311	{
	312	if (!msg)
	313	return set_err(no);
2127e193 GI	314	m_err.no = no;
	315	va_list ap; va_start(ap, msg);
	316	m_err.msg = vstrprintf(msg, ap);
	317	va_end(ap);
d008864d	318	return false;
2127e193 GI	319	}
2127e193 GI	320
d008864d	321	bool smart_interface::set_err(int no)
2127e193	322	{
d008864d	323	return set_err_var(&m_err, no);
2127e193 GI	324	}
2127e193 GI	325
d008864d	326	bool smart_interface::set_err_var(smart_device::error_info * err, int no)
2127e193 GI	327	{
	328	err->no = no;
	329	err->msg = get_msg_for_errno(no);
	330	if (err->msg.empty() && no != 0)
	331	err->msg = strprintf("Unknown error %d", no);
d008864d	332	return false;
2127e193 GI	333	}
	334
	335	const char * smart_interface::get_msg_for_errno(int no)
	336	{
	337	return strerror(no);
	338	}
	339
	340
	341	/////////////////////////////////////////////////////////////////////////////
	342	// Default device factory
	343
	344	smart_device * smart_interface::get_smart_device(const char * name, const char * type)
	345	{
	346	clear_err();
cfbba5b9 GI	347
	348	// Call platform specific autodetection if no device type specified
	349	smart_device * dev;
2127e193	350	if (!type \|\| !*type) {
cfbba5b9	351	dev = autodetect_smart_device(name);
2127e193 GI	352	if (!dev && !get_errno())
	353	set_err(EINVAL, "Unable to detect device type");
	354	return dev;
	355	}
	356
cfbba5b9 GI	357	// First check for platform specific device types
cfbba5b9 GI	358	dev = get_custom_smart_device(name, type);
2127e193 GI	359	if (dev \|\| get_errno())
	360	return dev;
	361
	362	if (!strcmp(type, "ata"))
	363	dev = get_ata_device(name, type);
	364	else if (!strcmp(type, "scsi"))
	365	dev = get_scsi_device(name, type);
	366
	367	else if ( ((!strncmp(type, "sat", 3) && (!type[3] \|\| strchr(",+", type[3])))
	368	\|\| (!strncmp(type, "usb", 3)))) {
	369	// Split "sat...+base..." -> ("sat...", "base...")
	370	unsigned satlen = strcspn(type, "+");
	371	std::string sattype(type, satlen);
	372	const char * basetype = (type[satlen] ? type+satlen+1 : "");
	373	// Recurse to allocate base device, default is standard SCSI
	374	if (!*basetype)
	375	basetype = "scsi";
bed94269 GI	376	smart_device_auto_ptr basedev( get_smart_device(name, basetype) );
bed94269 GI	377	if (!basedev) {
2127e193 GI	378	set_err(EINVAL, "Type '%s+...': %s", sattype.c_str(), get_errmsg());
	379	return 0;
	380	}
	381	// Result must be SCSI
bed94269	382	if (!basedev->is_scsi()) {
2127e193 GI	383	set_err(EINVAL, "Type '%s+...': Device type '%s' is not SCSI", sattype.c_str(), basetype);
	384	return 0;
	385	}
	386	// Attach SAT tunnel
bed94269 GI	387	ata_device * satdev = get_sat_device(sattype.c_str(), basedev->to_scsi());
	388	if (!satdev)
	389	return 0;
	390	basedev.release();
	391	return satdev;
2127e193 GI	392	}
	393
	394	else {
	395	set_err(EINVAL, "Unknown device type '%s'", type);
	396	return 0;
	397	}
	398	if (!dev && !get_errno())
	399	set_err(EINVAL, "Not a device of type '%s'", type);
	400	return dev;
	401	}
	402
	403	smart_device * smart_interface::get_custom_smart_device(const char * /name/, const char * /type/)
	404	{
	405	return 0;
	406	}
	407
54965743	408	std::string smart_interface::get_valid_custom_dev_types_str()
2127e193	409	{
54965743	410	return "";
2127e193	411	}