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os_linux.cpp
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os_linux.cpp
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/*
* os_linux.cpp
*
* Home page of code is: http://smartmontools.sourceforge.net
*
* Copyright (C) 2003-11 Bruce Allen <smartmontools-support@lists.sourceforge.net>
* Copyright (C) 2003-11 Doug Gilbert <dgilbert@interlog.com>
* Copyright (C) 2008-12 Hank Wu <hank@areca.com.tw>
* Copyright (C) 2008 Oliver Bock <brevilo@users.sourceforge.net>
* Copyright (C) 2008-12 Christian Franke <smartmontools-support@lists.sourceforge.net>
* Copyright (C) 2008 Jordan Hargrave <jordan_hargrave@dell.com>
*
* Parts of this file are derived from code that was
*
* Written By: Adam Radford <linux@3ware.com>
* Modifications By: Joel Jacobson <linux@3ware.com>
* Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* Brad Strand <linux@3ware.com>
*
* Copyright (C) 1999-2003 3ware Inc.
*
* Kernel compatablity By: Andre Hedrick <andre@suse.com>
* Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
*
* Other ars of this file are derived from code that was
*
* Copyright (C) 1999-2000 Michael Cornwell <cornwell@acm.org>
* Copyright (C) 2000 Andre Hedrick <andre@linux-ide.org>
*
* 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/>.
*
* This code was originally developed as a Senior Thesis by Michael Cornwell
* at the Concurrent Systems Laboratory (now part of the Storage Systems
* Research Center), Jack Baskin School of Engineering, University of
* California, Santa Cruz. http://ssrc.soe.ucsc.edu/
*
*/
// This file contains the linux-specific IOCTL parts of
// smartmontools. It includes one interface routine for ATA devices,
// one for SCSI devices, and one for ATA devices behind escalade
// controllers.
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <glob.h>
#include <scsi/scsi.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/sg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <unistd.h>
#include <stddef.h> // for offsetof()
#include <sys/uio.h>
#include <sys/types.h>
#include <dirent.h>
#ifndef makedev // old versions of types.h do not include sysmacros.h
#include <sys/sysmacros.h>
#endif
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
#endif
#include "int64.h"
#include "atacmds.h"
#include "os_linux.h"
#include "scsicmds.h"
#include "utility.h"
#include "cciss.h"
#include "megaraid.h"
#include "dev_interface.h"
#include "dev_ata_cmd_set.h"
#include "dev_areca.h"
#ifndef ENOTSUP
#define ENOTSUP ENOSYS
#endif
#define ARGUSED(x) ((void)(x))
const char * os_linux_cpp_cvsid = "$Id: os_linux.cpp 3824 2013-07-05 10:40:38Z samm2 $"
OS_LINUX_H_CVSID;
extern unsigned char failuretest_permissive;
namespace os_linux { // No need to publish anything, name provided for Doxygen
/////////////////////////////////////////////////////////////////////////////
/// Shared open/close routines
class linux_smart_device
: virtual public /*implements*/ smart_device
{
public:
explicit linux_smart_device(int flags, int retry_flags = -1)
: smart_device(never_called),
m_fd(-1),
m_flags(flags), m_retry_flags(retry_flags)
{ }
virtual ~linux_smart_device() throw();
virtual bool is_open() const;
virtual bool open();
virtual bool close();
protected:
/// Return filedesc for derived classes.
int get_fd() const
{ return m_fd; }
void set_fd(int fd)
{ m_fd = fd; }
private:
int m_fd; ///< filedesc, -1 if not open.
int m_flags; ///< Flags for ::open()
int m_retry_flags; ///< Flags to retry ::open(), -1 if no retry
};
linux_smart_device::~linux_smart_device() throw()
{
if (m_fd >= 0)
::close(m_fd);
}
bool linux_smart_device::is_open() const
{
return (m_fd >= 0);
}
bool linux_smart_device::open()
{
m_fd = ::open(get_dev_name(), m_flags);
if (m_fd < 0 && errno == EROFS && m_retry_flags != -1)
// Retry
m_fd = ::open(get_dev_name(), m_retry_flags);
if (m_fd < 0) {
if (errno == EBUSY && (m_flags & O_EXCL))
// device is locked
return set_err(EBUSY,
"The requested controller is used exclusively by another process!\n"
"(e.g. smartctl or smartd)\n"
"Please quit the impeding process or try again later...");
return set_err((errno==ENOENT || errno==ENOTDIR) ? ENODEV : errno);
}
if (m_fd >= 0) {
// sets FD_CLOEXEC on the opened device file descriptor. The
// descriptor is otherwise leaked to other applications (mail
// sender) which may be considered a security risk and may result
// in AVC messages on SELinux-enabled systems.
if (-1 == fcntl(m_fd, F_SETFD, FD_CLOEXEC))
// TODO: Provide an error printing routine in class smart_interface
pout("fcntl(set FD_CLOEXEC) failed, errno=%d [%s]\n", errno, strerror(errno));
}
return true;
}
// equivalent to close(file descriptor)
bool linux_smart_device::close()
{
int fd = m_fd; m_fd = -1;
if (::close(fd) < 0)
return set_err(errno);
return true;
}
// examples for smartctl
static const char smartctl_examples[] =
"=================================================== SMARTCTL EXAMPLES =====\n\n"
" smartctl --all /dev/hda (Prints all SMART information)\n\n"
" smartctl --smart=on --offlineauto=on --saveauto=on /dev/hda\n"
" (Enables SMART on first disk)\n\n"
" smartctl --test=long /dev/hda (Executes extended disk self-test)\n\n"
" smartctl --attributes --log=selftest --quietmode=errorsonly /dev/hda\n"
" (Prints Self-Test & Attribute errors)\n"
" smartctl --all --device=3ware,2 /dev/sda\n"
" smartctl --all --device=3ware,2 /dev/twe0\n"
" smartctl --all --device=3ware,2 /dev/twa0\n"
" smartctl --all --device=3ware,2 /dev/twl0\n"
" (Prints all SMART info for 3rd ATA disk on 3ware RAID controller)\n"
" smartctl --all --device=hpt,1/1/3 /dev/sda\n"
" (Prints all SMART info for the SATA disk attached to the 3rd PMPort\n"
" of the 1st channel on the 1st HighPoint RAID controller)\n"
" smartctl --all --device=areca,3/1 /dev/sg2\n"
" (Prints all SMART info for 3rd ATA disk of the 1st enclosure\n"
" on Areca RAID controller)\n"
;
/////////////////////////////////////////////////////////////////////////////
/// Linux ATA support
class linux_ata_device
: public /*implements*/ ata_device_with_command_set,
public /*extends*/ linux_smart_device
{
public:
linux_ata_device(smart_interface * intf, const char * dev_name, const char * req_type);
protected:
virtual int ata_command_interface(smart_command_set command, int select, char * data);
};
linux_ata_device::linux_ata_device(smart_interface * intf, const char * dev_name, const char * req_type)
: smart_device(intf, dev_name, "ata", req_type),
linux_smart_device(O_RDONLY | O_NONBLOCK)
{
}
// PURPOSE
// This is an interface routine meant to isolate the OS dependent
// parts of the code, and to provide a debugging interface. Each
// different port and OS needs to provide it's own interface. This
// is the linux one.
// DETAILED DESCRIPTION OF ARGUMENTS
// device: is the file descriptor provided by open()
// command: defines the different operations.
// select: additional input data if needed (which log, which type of
// self-test).
// data: location to write output data, if needed (512 bytes).
// Note: not all commands use all arguments.
// RETURN VALUES
// -1 if the command failed
// 0 if the command succeeded,
// STATUS_CHECK routine:
// -1 if the command failed
// 0 if the command succeeded and disk SMART status is "OK"
// 1 if the command succeeded and disk SMART status is "FAILING"
#define BUFFER_LENGTH (4+512)
int linux_ata_device::ata_command_interface(smart_command_set command, int select, char * data)
{
unsigned char buff[BUFFER_LENGTH];
// positive: bytes to write to caller. negative: bytes to READ from
// caller. zero: non-data command
int copydata=0;
const int HDIO_DRIVE_CMD_OFFSET = 4;
// See struct hd_drive_cmd_hdr in hdreg.h. Before calling ioctl()
// buff[0]: ATA COMMAND CODE REGISTER
// buff[1]: ATA SECTOR NUMBER REGISTER == LBA LOW REGISTER
// buff[2]: ATA FEATURES REGISTER
// buff[3]: ATA SECTOR COUNT REGISTER
// Note that on return:
// buff[2] contains the ATA SECTOR COUNT REGISTER
// clear out buff. Large enough for HDIO_DRIVE_CMD (4+512 bytes)
memset(buff, 0, BUFFER_LENGTH);
buff[0]=ATA_SMART_CMD;
switch (command){
case CHECK_POWER_MODE:
buff[0]=ATA_CHECK_POWER_MODE;
copydata=1;
break;
case READ_VALUES:
buff[2]=ATA_SMART_READ_VALUES;
buff[3]=1;
copydata=512;
break;
case READ_THRESHOLDS:
buff[2]=ATA_SMART_READ_THRESHOLDS;
buff[1]=buff[3]=1;
copydata=512;
break;
case READ_LOG:
buff[2]=ATA_SMART_READ_LOG_SECTOR;
buff[1]=select;
buff[3]=1;
copydata=512;
break;
case WRITE_LOG:
break;
case IDENTIFY:
buff[0]=ATA_IDENTIFY_DEVICE;
buff[3]=1;
copydata=512;
break;
case PIDENTIFY:
buff[0]=ATA_IDENTIFY_PACKET_DEVICE;
buff[3]=1;
copydata=512;
break;
case ENABLE:
buff[2]=ATA_SMART_ENABLE;
buff[1]=1;
break;
case DISABLE:
buff[2]=ATA_SMART_DISABLE;
buff[1]=1;
break;
case STATUS:
// this command only says if SMART is working. It could be
// replaced with STATUS_CHECK below.
buff[2]=ATA_SMART_STATUS;
break;
case AUTO_OFFLINE:
// NOTE: According to ATAPI 4 and UP, this command is obsolete
// select == 241 for enable but no data transfer. Use TASK ioctl.
buff[1]=ATA_SMART_AUTO_OFFLINE;
buff[2]=select;
break;
case AUTOSAVE:
// select == 248 for enable but no data transfer. Use TASK ioctl.
buff[1]=ATA_SMART_AUTOSAVE;
buff[2]=select;
break;
case IMMEDIATE_OFFLINE:
buff[2]=ATA_SMART_IMMEDIATE_OFFLINE;
buff[1]=select;
break;
case STATUS_CHECK:
// This command uses HDIO_DRIVE_TASK and has different syntax than
// the other commands.
buff[1]=ATA_SMART_STATUS;
break;
default:
pout("Unrecognized command %d in linux_ata_command_interface()\n"
"Please contact " PACKAGE_BUGREPORT "\n", command);
errno=ENOSYS;
return -1;
}
// This command uses the HDIO_DRIVE_TASKFILE ioctl(). This is the
// only ioctl() that can be used to WRITE data to the disk.
if (command==WRITE_LOG) {
unsigned char task[sizeof(ide_task_request_t)+512];
ide_task_request_t *reqtask=(ide_task_request_t *) task;
task_struct_t *taskfile=(task_struct_t *) reqtask->io_ports;
int retval;
memset(task, 0, sizeof(task));
taskfile->data = 0;
taskfile->feature = ATA_SMART_WRITE_LOG_SECTOR;
taskfile->sector_count = 1;
taskfile->sector_number = select;
taskfile->low_cylinder = 0x4f;
taskfile->high_cylinder = 0xc2;
taskfile->device_head = 0;
taskfile->command = ATA_SMART_CMD;
reqtask->data_phase = TASKFILE_OUT;
reqtask->req_cmd = IDE_DRIVE_TASK_OUT;
reqtask->out_size = 512;
reqtask->in_size = 0;
// copy user data into the task request structure
memcpy(task+sizeof(ide_task_request_t), data, 512);
if ((retval=ioctl(get_fd(), HDIO_DRIVE_TASKFILE, task))) {
if (retval==-EINVAL)
pout("Kernel lacks HDIO_DRIVE_TASKFILE support; compile kernel with CONFIG_IDE_TASKFILE_IO set\n");
return -1;
}
return 0;
}
// There are two different types of ioctls(). The HDIO_DRIVE_TASK
// one is this:
if (command==STATUS_CHECK || command==AUTOSAVE || command==AUTO_OFFLINE){
int retval;
// NOT DOCUMENTED in /usr/src/linux/include/linux/hdreg.h. You
// have to read the IDE driver source code. Sigh.
// buff[0]: ATA COMMAND CODE REGISTER
// buff[1]: ATA FEATURES REGISTER
// buff[2]: ATA SECTOR_COUNT
// buff[3]: ATA SECTOR NUMBER
// buff[4]: ATA CYL LO REGISTER
// buff[5]: ATA CYL HI REGISTER
// buff[6]: ATA DEVICE HEAD
unsigned const char normal_lo=0x4f, normal_hi=0xc2;
unsigned const char failed_lo=0xf4, failed_hi=0x2c;
buff[4]=normal_lo;
buff[5]=normal_hi;
if ((retval=ioctl(get_fd(), HDIO_DRIVE_TASK, buff))) {
if (retval==-EINVAL) {
pout("Error SMART Status command via HDIO_DRIVE_TASK failed");
pout("Rebuild older linux 2.2 kernels with HDIO_DRIVE_TASK support added\n");
}
else
syserror("Error SMART Status command failed");
return -1;
}
// Cyl low and Cyl high unchanged means "Good SMART status"
if (buff[4]==normal_lo && buff[5]==normal_hi)
return 0;
// These values mean "Bad SMART status"
if (buff[4]==failed_lo && buff[5]==failed_hi)
return 1;
// We haven't gotten output that makes sense; print out some debugging info
syserror("Error SMART Status command failed");
pout("Please get assistance from " PACKAGE_HOMEPAGE "\n");
pout("Register values returned from SMART Status command are:\n");
pout("ST =0x%02x\n",(int)buff[0]);
pout("ERR=0x%02x\n",(int)buff[1]);
pout("NS =0x%02x\n",(int)buff[2]);
pout("SC =0x%02x\n",(int)buff[3]);
pout("CL =0x%02x\n",(int)buff[4]);
pout("CH =0x%02x\n",(int)buff[5]);
pout("SEL=0x%02x\n",(int)buff[6]);
return -1;
}
#if 1
// Note to people doing ports to other OSes -- don't worry about
// this block -- you can safely ignore it. I have put it here
// because under linux when you do IDENTIFY DEVICE to a packet
// device, it generates an ugly kernel syslog error message. This
// is harmless but frightens users. So this block detects packet
// devices and make IDENTIFY DEVICE fail "nicely" without a syslog
// error message.
//
// If you read only the ATA specs, it appears as if a packet device
// *might* respond to the IDENTIFY DEVICE command. This is
// misleading - it's because around the time that SFF-8020 was
// incorporated into the ATA-3/4 standard, the ATA authors were
// sloppy. See SFF-8020 and you will see that ATAPI devices have
// *always* had IDENTIFY PACKET DEVICE as a mandatory part of their
// command set, and return 'Command Aborted' to IDENTIFY DEVICE.
if (command==IDENTIFY || command==PIDENTIFY){
unsigned short deviceid[256];
// check the device identity, as seen when the system was booted
// or the device was FIRST registered. This will not be current
// if the user has subsequently changed some of the parameters. If
// device is a packet device, swap the command interpretations.
if (!ioctl(get_fd(), HDIO_GET_IDENTITY, deviceid) && (deviceid[0] & 0x8000))
buff[0]=(command==IDENTIFY)?ATA_IDENTIFY_PACKET_DEVICE:ATA_IDENTIFY_DEVICE;
}
#endif
// We are now doing the HDIO_DRIVE_CMD type ioctl.
if ((ioctl(get_fd(), HDIO_DRIVE_CMD, buff)))
return -1;
// CHECK POWER MODE command returns information in the Sector Count
// register (buff[3]). Copy to return data buffer.
if (command==CHECK_POWER_MODE)
buff[HDIO_DRIVE_CMD_OFFSET]=buff[2];
// if the command returns data then copy it back
if (copydata)
memcpy(data, buff+HDIO_DRIVE_CMD_OFFSET, copydata);
return 0;
}
// >>>>>> Start of general SCSI specific linux code
/* Linux specific code.
* Historically smartmontools (and smartsuite before it) used the
* SCSI_IOCTL_SEND_COMMAND ioctl which is available to all linux device
* nodes that use the SCSI subsystem. A better interface has been available
* via the SCSI generic (sg) driver but this involves the extra step of
* mapping disk devices (e.g. /dev/sda) to the corresponding sg device
* (e.g. /dev/sg2). In the linux kernel 2.6 series most of the facilities of
* the sg driver have become available via the SG_IO ioctl which is available
* on all SCSI devices (on SCSI tape devices from lk 2.6.6).
* So the strategy below is to find out if the SG_IO ioctl is available and
* if so use it; failing that use the older SCSI_IOCTL_SEND_COMMAND ioctl.
* Should work in 2.0, 2.2, 2.4 and 2.6 series linux kernels. */
#define MAX_DXFER_LEN 1024 /* can be increased if necessary */
#define SEND_IOCTL_RESP_SENSE_LEN 16 /* ioctl limitation */
#define SG_IO_RESP_SENSE_LEN 64 /* large enough see buffer */
#define LSCSI_DRIVER_MASK 0xf /* mask out "suggestions" */
#define LSCSI_DRIVER_SENSE 0x8 /* alternate CHECK CONDITION indication */
#define LSCSI_DID_ERROR 0x7 /* Need to work around aacraid driver quirk */
#define LSCSI_DRIVER_TIMEOUT 0x6
#define LSCSI_DID_TIME_OUT 0x3
#define LSCSI_DID_BUS_BUSY 0x2
#define LSCSI_DID_NO_CONNECT 0x1
#ifndef SCSI_IOCTL_SEND_COMMAND
#define SCSI_IOCTL_SEND_COMMAND 1
#endif
#define SG_IO_PRESENT_UNKNOWN 0
#define SG_IO_PRESENT_YES 1
#define SG_IO_PRESENT_NO 2
static int sg_io_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop, int report,
int unknown);
static int sisc_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop, int report);
static int sg_io_state = SG_IO_PRESENT_UNKNOWN;
/* Preferred implementation for issuing SCSI commands in linux. This
* function uses the SG_IO ioctl. Return 0 if command issued successfully
* (various status values should still be checked). If the SCSI command
* cannot be issued then a negative errno value is returned. */
static int sg_io_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop, int report,
int unknown)
{
#ifndef SG_IO
ARGUSED(dev_fd); ARGUSED(iop); ARGUSED(report);
return -ENOTTY;
#else
struct sg_io_hdr io_hdr;
if (report > 0) {
int k, j;
const unsigned char * ucp = iop->cmnd;
const char * np;
char buff[256];
const int sz = (int)sizeof(buff);
np = scsi_get_opcode_name(ucp[0]);
j = snprintf(buff, sz, " [%s: ", np ? np : "<unknown opcode>");
for (k = 0; k < (int)iop->cmnd_len; ++k)
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "%02x ", ucp[k]);
if ((report > 1) &&
(DXFER_TO_DEVICE == iop->dxfer_dir) && (iop->dxferp)) {
int trunc = (iop->dxfer_len > 256) ? 1 : 0;
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "]\n Outgoing "
"data, len=%d%s:\n", (int)iop->dxfer_len,
(trunc ? " [only first 256 bytes shown]" : ""));
dStrHex((const char *)iop->dxferp,
(trunc ? 256 : iop->dxfer_len) , 1);
}
else
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "]\n");
pout("%s", buff);
}
memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = iop->cmnd_len;
io_hdr.mx_sb_len = iop->max_sense_len;
io_hdr.dxfer_len = iop->dxfer_len;
io_hdr.dxferp = iop->dxferp;
io_hdr.cmdp = iop->cmnd;
io_hdr.sbp = iop->sensep;
/* sg_io_hdr interface timeout has millisecond units. Timeout of 0
defaults to 60 seconds. */
io_hdr.timeout = ((0 == iop->timeout) ? 60 : iop->timeout) * 1000;
switch (iop->dxfer_dir) {
case DXFER_NONE:
io_hdr.dxfer_direction = SG_DXFER_NONE;
break;
case DXFER_FROM_DEVICE:
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
break;
case DXFER_TO_DEVICE:
io_hdr.dxfer_direction = SG_DXFER_TO_DEV;
break;
default:
pout("do_scsi_cmnd_io: bad dxfer_dir\n");
return -EINVAL;
}
iop->resp_sense_len = 0;
iop->scsi_status = 0;
iop->resid = 0;
if (ioctl(dev_fd, SG_IO, &io_hdr) < 0) {
if (report && (! unknown))
pout(" SG_IO ioctl failed, errno=%d [%s]\n", errno,
strerror(errno));
return -errno;
}
iop->resid = io_hdr.resid;
iop->scsi_status = io_hdr.status;
if (report > 0) {
pout(" scsi_status=0x%x, host_status=0x%x, driver_status=0x%x\n"
" info=0x%x duration=%d milliseconds resid=%d\n", io_hdr.status,
io_hdr.host_status, io_hdr.driver_status, io_hdr.info,
io_hdr.duration, io_hdr.resid);
if (report > 1) {
if (DXFER_FROM_DEVICE == iop->dxfer_dir) {
int trunc, len;
len = iop->dxfer_len - iop->resid;
trunc = (len > 256) ? 1 : 0;
if (len > 0) {
pout(" Incoming data, len=%d%s:\n", len,
(trunc ? " [only first 256 bytes shown]" : ""));
dStrHex((const char*)iop->dxferp, (trunc ? 256 : len),
1);
} else
pout(" Incoming data trimmed to nothing by resid\n");
}
}
}
if (io_hdr.info & SG_INFO_CHECK) { /* error or warning */
int masked_driver_status = (LSCSI_DRIVER_MASK & io_hdr.driver_status);
if (0 != io_hdr.host_status) {
if ((LSCSI_DID_NO_CONNECT == io_hdr.host_status) ||
(LSCSI_DID_BUS_BUSY == io_hdr.host_status) ||
(LSCSI_DID_TIME_OUT == io_hdr.host_status))
return -ETIMEDOUT;
else
/* Check for DID_ERROR - workaround for aacraid driver quirk */
if (LSCSI_DID_ERROR != io_hdr.host_status) {
return -EIO; /* catch all if not DID_ERR */
}
}
if (0 != masked_driver_status) {
if (LSCSI_DRIVER_TIMEOUT == masked_driver_status)
return -ETIMEDOUT;
else if (LSCSI_DRIVER_SENSE != masked_driver_status)
return -EIO;
}
if (LSCSI_DRIVER_SENSE == masked_driver_status)
iop->scsi_status = SCSI_STATUS_CHECK_CONDITION;
iop->resp_sense_len = io_hdr.sb_len_wr;
if ((SCSI_STATUS_CHECK_CONDITION == iop->scsi_status) &&
iop->sensep && (iop->resp_sense_len > 0)) {
if (report > 1) {
pout(" >>> Sense buffer, len=%d:\n",
(int)iop->resp_sense_len);
dStrHex((const char *)iop->sensep, iop->resp_sense_len , 1);
}
}
if (report) {
if (SCSI_STATUS_CHECK_CONDITION == iop->scsi_status) {
if ((iop->sensep[0] & 0x7f) > 0x71)
pout(" status=%x: [desc] sense_key=%x asc=%x ascq=%x\n",
iop->scsi_status, iop->sensep[1] & 0xf,
iop->sensep[2], iop->sensep[3]);
else
pout(" status=%x: sense_key=%x asc=%x ascq=%x\n",
iop->scsi_status, iop->sensep[2] & 0xf,
iop->sensep[12], iop->sensep[13]);
}
else
pout(" status=0x%x\n", iop->scsi_status);
}
}
return 0;
#endif
}
struct linux_ioctl_send_command
{
int inbufsize;
int outbufsize;
UINT8 buff[MAX_DXFER_LEN + 16];
};
/* The Linux SCSI_IOCTL_SEND_COMMAND ioctl is primitive and it doesn't
* support: CDB length (guesses it from opcode), resid and timeout.
* Patches in Linux 2.4.21 and 2.5.70 to extend SEND DIAGNOSTIC timeout
* to 2 hours in order to allow long foreground extended self tests. */
static int sisc_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop, int report)
{
struct linux_ioctl_send_command wrk;
int status, buff_offset;
size_t len;
memcpy(wrk.buff, iop->cmnd, iop->cmnd_len);
buff_offset = iop->cmnd_len;
if (report > 0) {
int k, j;
const unsigned char * ucp = iop->cmnd;
const char * np;
char buff[256];
const int sz = (int)sizeof(buff);
np = scsi_get_opcode_name(ucp[0]);
j = snprintf(buff, sz, " [%s: ", np ? np : "<unknown opcode>");
for (k = 0; k < (int)iop->cmnd_len; ++k)
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "%02x ", ucp[k]);
if ((report > 1) &&
(DXFER_TO_DEVICE == iop->dxfer_dir) && (iop->dxferp)) {
int trunc = (iop->dxfer_len > 256) ? 1 : 0;
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "]\n Outgoing "
"data, len=%d%s:\n", (int)iop->dxfer_len,
(trunc ? " [only first 256 bytes shown]" : ""));
dStrHex((const char *)iop->dxferp,
(trunc ? 256 : iop->dxfer_len) , 1);
}
else
j += snprintf(&buff[j], (sz > j ? (sz - j) : 0), "]\n");
pout("%s", buff);
}
switch (iop->dxfer_dir) {
case DXFER_NONE:
wrk.inbufsize = 0;
wrk.outbufsize = 0;
break;
case DXFER_FROM_DEVICE:
wrk.inbufsize = 0;
if (iop->dxfer_len > MAX_DXFER_LEN)
return -EINVAL;
wrk.outbufsize = iop->dxfer_len;
break;
case DXFER_TO_DEVICE:
if (iop->dxfer_len > MAX_DXFER_LEN)
return -EINVAL;
memcpy(wrk.buff + buff_offset, iop->dxferp, iop->dxfer_len);
wrk.inbufsize = iop->dxfer_len;
wrk.outbufsize = 0;
break;
default:
pout("do_scsi_cmnd_io: bad dxfer_dir\n");
return -EINVAL;
}
iop->resp_sense_len = 0;
iop->scsi_status = 0;
iop->resid = 0;
status = ioctl(dev_fd, SCSI_IOCTL_SEND_COMMAND, &wrk);
if (-1 == status) {
if (report)
pout(" SCSI_IOCTL_SEND_COMMAND ioctl failed, errno=%d [%s]\n",
errno, strerror(errno));
return -errno;
}
if (0 == status) {
if (report > 0)
pout(" status=0\n");
if (DXFER_FROM_DEVICE == iop->dxfer_dir) {
memcpy(iop->dxferp, wrk.buff, iop->dxfer_len);
if (report > 1) {
int trunc = (iop->dxfer_len > 256) ? 1 : 0;
pout(" Incoming data, len=%d%s:\n", (int)iop->dxfer_len,
(trunc ? " [only first 256 bytes shown]" : ""));
dStrHex((const char*)iop->dxferp,
(trunc ? 256 : iop->dxfer_len) , 1);
}
}
return 0;
}
iop->scsi_status = status & 0x7e; /* bits 0 and 7 used to be for vendors */
if (LSCSI_DRIVER_SENSE == ((status >> 24) & 0xf))
iop->scsi_status = SCSI_STATUS_CHECK_CONDITION;
len = (SEND_IOCTL_RESP_SENSE_LEN < iop->max_sense_len) ?
SEND_IOCTL_RESP_SENSE_LEN : iop->max_sense_len;
if ((SCSI_STATUS_CHECK_CONDITION == iop->scsi_status) &&
iop->sensep && (len > 0)) {
memcpy(iop->sensep, wrk.buff, len);
iop->resp_sense_len = len;
if (report > 1) {
pout(" >>> Sense buffer, len=%d:\n", (int)len);
dStrHex((const char *)wrk.buff, len , 1);
}
}
if (report) {
if (SCSI_STATUS_CHECK_CONDITION == iop->scsi_status) {
pout(" status=%x: sense_key=%x asc=%x ascq=%x\n", status & 0xff,
wrk.buff[2] & 0xf, wrk.buff[12], wrk.buff[13]);
}
else
pout(" status=0x%x\n", status);
}
if (iop->scsi_status > 0)
return 0;
else {
if (report > 0)
pout(" ioctl status=0x%x but scsi status=0, fail with EIO\n",
status);
return -EIO; /* give up, assume no device there */
}
}
/* SCSI command transmission interface function, linux version.
* Returns 0 if SCSI command successfully launched and response
* received. Even when 0 is returned the caller should check
* scsi_cmnd_io::scsi_status for SCSI defined errors and warnings
* (e.g. CHECK CONDITION). If the SCSI command could not be issued
* (e.g. device not present or timeout) or some other problem
* (e.g. timeout) then returns a negative errno value */
static int do_normal_scsi_cmnd_io(int dev_fd, struct scsi_cmnd_io * iop,
int report)
{
int res;
/* implementation relies on static sg_io_state variable. If not
* previously set tries the SG_IO ioctl. If that succeeds assume
* that SG_IO ioctl functional. If it fails with an errno value
* other than ENODEV (no device) or permission then assume
* SCSI_IOCTL_SEND_COMMAND is the only option. */
switch (sg_io_state) {
case SG_IO_PRESENT_UNKNOWN:
/* ignore report argument */
if (0 == (res = sg_io_cmnd_io(dev_fd, iop, report, 1))) {
sg_io_state = SG_IO_PRESENT_YES;
return 0;
} else if ((-ENODEV == res) || (-EACCES == res) || (-EPERM == res))
return res; /* wait until we see a device */
sg_io_state = SG_IO_PRESENT_NO;
/* drop through by design */
case SG_IO_PRESENT_NO:
return sisc_cmnd_io(dev_fd, iop, report);
case SG_IO_PRESENT_YES:
return sg_io_cmnd_io(dev_fd, iop, report, 0);
default:
pout(">>>> do_scsi_cmnd_io: bad sg_io_state=%d\n", sg_io_state);
sg_io_state = SG_IO_PRESENT_UNKNOWN;
return -EIO; /* report error and reset state */
}
}
// >>>>>> End of general SCSI specific linux code
/////////////////////////////////////////////////////////////////////////////
/// Standard SCSI support
class linux_scsi_device
: public /*implements*/ scsi_device,
public /*extends*/ linux_smart_device
{
public:
linux_scsi_device(smart_interface * intf, const char * dev_name,
const char * req_type, bool scanning = false);
virtual smart_device * autodetect_open();
virtual bool scsi_pass_through(scsi_cmnd_io * iop);
private:
bool m_scanning; ///< true if created within scan_smart_devices
};
linux_scsi_device::linux_scsi_device(smart_interface * intf,
const char * dev_name, const char * req_type, bool scanning /*= false*/)
: smart_device(intf, dev_name, "scsi", req_type),
// If opened with O_RDWR, a SATA disk in standby mode
// may spin-up after device close().
linux_smart_device(O_RDONLY | O_NONBLOCK),
m_scanning(scanning)
{
}
bool linux_scsi_device::scsi_pass_through(scsi_cmnd_io * iop)
{
int status = do_normal_scsi_cmnd_io(get_fd(), iop, scsi_debugmode);
if (status < 0)
return set_err(-status);
return true;
}
/////////////////////////////////////////////////////////////////////////////
/// LSI MegaRAID support
class linux_megaraid_device
: public /* implements */ scsi_device,
public /* extends */ linux_smart_device
{
public:
linux_megaraid_device(smart_interface *intf, const char *name,
unsigned int bus, unsigned int tgt);
virtual ~linux_megaraid_device() throw();
virtual smart_device * autodetect_open();
virtual bool open();
virtual bool close();
virtual bool scsi_pass_through(scsi_cmnd_io *iop);
private:
unsigned int m_disknum;
unsigned int m_busnum;
unsigned int m_hba;
int m_fd;
bool (linux_megaraid_device::*pt_cmd)(int cdblen, void *cdb, int dataLen, void *data,
int senseLen, void *sense, int report, int direction);
bool megasas_cmd(int cdbLen, void *cdb, int dataLen, void *data,
int senseLen, void *sense, int report, int direction);
bool megadev_cmd(int cdbLen, void *cdb, int dataLen, void *data,
int senseLen, void *sense, int report, int direction);
};
linux_megaraid_device::linux_megaraid_device(smart_interface *intf,
const char *dev_name, unsigned int bus, unsigned int tgt)
: smart_device(intf, dev_name, "megaraid", "megaraid"),
linux_smart_device(O_RDWR | O_NONBLOCK),
m_disknum(tgt), m_busnum(bus), m_hba(0),
m_fd(-1), pt_cmd(0)
{
set_info().info_name = strprintf("%s [megaraid_disk_%02d]", dev_name, m_disknum);
set_info().dev_type = strprintf("megaraid,%d", tgt);
}
linux_megaraid_device::~linux_megaraid_device() throw()
{
if (m_fd >= 0)
::close(m_fd);
}
smart_device * linux_megaraid_device::autodetect_open()
{
int report = scsi_debugmode;
// Open device
if (!open())
return this;
// The code below is based on smartd.cpp:SCSIFilterKnown()
if (strcmp(get_req_type(), "megaraid"))
return this;
// Get INQUIRY
unsigned char req_buff[64] = {0, };
int req_len = 36;
if (scsiStdInquiry(this, req_buff, req_len)) {
close();
set_err(EIO, "INQUIRY failed");
return this;
}
int avail_len = req_buff[4] + 5;
int len = (avail_len < req_len ? avail_len : req_len);
if (len < 36)
return this;
if (report)
pout("Got MegaRAID inquiry.. %s\n", req_buff+8);
// Use INQUIRY to detect type
{
// SAT?
ata_device * newdev = smi()->autodetect_sat_device(this, req_buff, len);
if (newdev) // NOTE: 'this' is now owned by '*newdev'
return newdev;
}
// Nothing special found
return this;
}
bool linux_megaraid_device::open()
{
char line[128];
int mjr;
int report = scsi_debugmode;
if(sscanf(get_dev_name(),"/dev/bus/%d", &m_hba) == 0) {
if (!linux_smart_device::open())
return false;
/* Get device HBA */
struct sg_scsi_id sgid;
if (ioctl(get_fd(), SG_GET_SCSI_ID, &sgid) == 0) {
m_hba = sgid.host_no;
}
else if (ioctl(get_fd(), SCSI_IOCTL_GET_BUS_NUMBER, &m_hba) != 0) {
int err = errno;
linux_smart_device::close();
return set_err(err, "can't get bus number");
} // we dont need this device anymore
linux_smart_device::close();
}
/* Perform mknod of device ioctl node */
FILE * fp = fopen("/proc/devices", "r");
while (fgets(line, sizeof(line), fp) != NULL) {
int n1 = 0;
if (sscanf(line, "%d megaraid_sas_ioctl%n", &mjr, &n1) == 1 && n1 == 22) {
n1=mknod("/dev/megaraid_sas_ioctl_node", S_IFCHR, makedev(mjr, 0));
if(report > 0)
pout("Creating /dev/megaraid_sas_ioctl_node = %d\n", n1 >= 0 ? 0 : errno);
if (n1 >= 0 || errno == EEXIST)
break;
}
else if (sscanf(line, "%d megadev%n", &mjr, &n1) == 1 && n1 == 11) {
n1=mknod("/dev/megadev0", S_IFCHR, makedev(mjr, 0));
if(report > 0)
pout("Creating /dev/megadev0 = %d\n", n1 >= 0 ? 0 : errno);
if (n1 >= 0 || errno == EEXIST)
break;
}
}
fclose(fp);
/* Open Device IOCTL node */
if ((m_fd = ::open("/dev/megaraid_sas_ioctl_node", O_RDWR)) >= 0) {
pt_cmd = &linux_megaraid_device::megasas_cmd;
}
else if ((m_fd = ::open("/dev/megadev0", O_RDWR)) >= 0) {