mtx.h

通用SCSI设备备份/读写程序

/* MTX -- SCSI Tape Attached Medium Control Program

   Copyright 1997-1998 Leonard N. Zubkoff <[e-mail]>
 
   Changes 1999 Eric Lee Green to add support for multi-drive tape changers.

   $Date: 2001/06/19 21:51:32 $
   $Revision: 1.3 $
   See mtx.c for licensing information. 

*/

#ifndef MTX_H  /* protect against multiple includes... */
#define MTX_H 1

/* surround all the Unix-stuff w/ifndef VMS */
#ifdef VMS
#include "[.vms]defs.h"
#else /* all the Unix stuff:  */

#include "config.h"  /* all the autoconf stuff. */

/* all the general Unix includes: */

#include <stdio.h>
#include <errno.h>

#if HAVE_STDLIB_H
#  include <stdlib.h>
#endif

#if HAVE_FCNTL_H
#  include <fcntl.h>
#endif

#if HAVE_SYS_TYPES_H
#  include <sys/types.h>
#endif

#if HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif

#if HAVE_UNISTD_H
#  include <unistd.h>
#endif

#if HAVE_STDARG_H
#  include <stdarg.h>
#endif

#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif

#if HAVE_SYS_IOCTL_H
#  include <sys/ioctl.h>
#endif

/* Now greately modified to use GNU Autoconf stuff: */
/* If we use the 'sg' interface, like Linux, do this: */
#if HAVE_SCSI_SG_H
#  include <scsi/scsi.h>
#  include <scsi/scsi_ioctl.h>
#  include <scsi/sg.h>
typedef int DEVICE_TYPE; /* the sg interface uses this. */
#  define HAVE_GET_ID_LUN 1  /* signal that we have it... */
#endif

/* The 'cam' interface, like FreeBSD: */
#if HAVE_CAMLIB_H
#  include <camlib.h> /* easy (?) access to the CAM user library. */
#  include <cam/cam_ccb.h>
#  include <cam/scsi/scsi_message.h> /* sigh sigh sigh! */
typedef struct cam_device *DEVICE_TYPE;
#endif


/* the 'uscsi' interface, as used on Solaris: */
#if HAVE_SYS_SCSI_IMPL_USCSI_H
#include <sys/scsi/impl/uscsi.h>
typedef int DEVICE_TYPE;
#endif

/* the scsi_ctl interface, as used on HP/UX: */
#if HAVE_SYS_SCSI_CTL_H
#  include <sys/wsio.h>
#  include <sys/spinlock.h>
#  include <sys/scsi.h>
#  include <sys/scsi_ctl.h>
  typedef int DEVICE_TYPE;
#  ifndef VERSION
#     define VERSION "1.2.12 hbb"
#  endif
#endif


/* The 'tm_buf' interface, as used on AIX. */
#ifdef HAVE_SYS_SCSI_H
#include <sys/scsi.h>
#include <sys/scsi_buf.h>
#include <sys/devinfo.h> /* devinfo. */
typedef struct tm_device_type {
  int filenum;
  int id;
  int lun;
  char *DeviceName;
} *DEVICE_TYPE;
    
#endif

   /* the 'dslib' interface, as used on SGI.  */
#if HAVE_DSLIB_H
#include <dslib.h>
typedef dsreq_t *DEVICE_TYPE; /* 64-bit pointers/32bit int on later sgi? */
#endif


#if ((defined(__alpha) && defined(__osf__)) || \
     defined(ultrix) || defined(__ultrix))
#include "du/defs.h"
#endif


#endif /* VMS protect. */

/* Do a test for LITTLE_ENDIAN_BITFIELDS. Use WORDS_BIGENDIAN as set
 * by configure: 
 */

#if WORDS_BIGENDIAN
# define BIG_ENDIAN_BITFIELDS
#else
# define LITTLE_ENDIAN_BITFIELDS
#endif

/* Get rid of some Hocky Pux defines: */
#ifdef S_NO_SENSE
#undef S_NO_SENSE
#endif
#ifdef S_RECOVERED_ERROR
#undef S_RECOVERED_ERROR
#endif
#ifdef S_NOT_READY
#undef S_NOT_READY
#endif
#ifdef S_MEDIUM_ERROR
#undef S_MEDIUM_ERROR
#endif
#ifdef S_HARDWARE_ERROR
#undef S_HARDWARE_ERROR
#endif
#ifdef S_UNIT_ATTENTION
#undef S_UNIT_ATTENTION
#endif
#ifdef S_BLANK_CHECK
#undef S_BLANK_CHECK
#endif
#ifdef S_VOLUME_OVERFLOW
#undef S_VOLUME_OVERFLOW
#endif

/* Note: These are only used for defaults for when we don't have 
 * the element assignment mode page to tell us real amount...
 */
#define MAX_STORAGE_ELEMENTS 64 /* for the BIG jukeboxes! */
#define MAX_TRANSFER_ELEMENTS 2  /* we just do dual-drive for now :-} */
#define MAX_TRANSPORT_ELEMENTS 1 /* we just do one arm for now... */

/* These are flags used for the READ_ELEMENT_STATUS and MOVE_MEDIUM
 * commands:
 */
typedef struct SCSI_Flags_Struct {
  unsigned char eepos;
  unsigned char invert;
  unsigned char no_attached; /* ignore _attached bit */
  unsigned char no_barcodes;  /* don't try to get barcodes. */
  int numbytes;
  int elementtype;
  int numelements;
  int attached;
  int has_barcodes;
} SCSI_Flags_T;

typedef enum { false, true } boolean;


typedef enum { Input, Output } Direction_T;


typedef unsigned char CDB_T[12];


typedef struct Inquiry
{
#ifdef LITTLE_ENDIAN_BITFIELDS
  unsigned char PeripheralDeviceType:5;			/* Byte 0 Bits 0-4 */
  unsigned char PeripheralQualifier:3;			/* Byte 0 Bits 5-7 */
  unsigned char DeviceTypeModifier:7;			/* Byte 1 Bits 0-6 */
  boolean RMB:1;					/* Byte 1 Bit 7 */
  unsigned char ANSI_ApprovedVersion:3;			/* Byte 2 Bits 0-2 */
  unsigned char ECMA_Version:3;				/* Byte 2 Bits 3-5 */
  unsigned char ISO_Version:2;				/* Byte 2 Bits 6-7 */
  unsigned char ResponseDataFormat:4;			/* Byte 3 Bits 0-3 */
  unsigned char :2;					/* Byte 3 Bits 4-5 */
  boolean TrmIOP:1;					/* Byte 3 Bit 6 */
  boolean AENC:1;					/* Byte 3 Bit 7 */
#else
  unsigned char PeripheralQualifier:3;			/* Byte 0 Bits 5-7 */
  unsigned char PeripheralDeviceType:5;			/* Byte 0 Bits 0-4 */
  boolean RMB:1;					/* Byte 1 Bit 7 */
  unsigned char DeviceTypeModifier:7;			/* Byte 1 Bits 0-6 */
  unsigned char ISO_Version:2;				/* Byte 2 Bits 6-7 */
  unsigned char ECMA_Version:3;				/* Byte 2 Bits 3-5 */
  unsigned char ANSI_ApprovedVersion:3;			/* Byte 2 Bits 0-2 */
  boolean AENC:1;					/* Byte 3 Bit 7 */
  boolean TrmIOP:1;					/* Byte 3 Bit 6 */
  unsigned char :2;					/* Byte 3 Bits 4-5 */
  unsigned char ResponseDataFormat:4;			/* Byte 3 Bits 0-3 */
#endif
  unsigned char AdditionalLength;			/* Byte 4 */
  unsigned char :8;					/* Byte 5 */
#ifdef LITTLE_ENDIAN_BITFIELDS
  boolean ADDR16:1;                                    /* Byte 6 bit 0 */
  boolean Obs6_1:1;                                    /* Byte 6 bit 1 */
  boolean Obs6_2:1; /* obsolete */                     /* Byte 6 bit 2 */
  boolean MChngr:1; /* Media Changer */                /* Byte 6 bit 3 */
  boolean MultiP:1;                                    /* Byte 6 bit 4 */
  boolean VS:1;                                        /* Byte 6 bit 5 */
  boolean EncServ:1;                                   /* Byte 6 bit 6 */
  boolean BQue:1;                                      /* Byte 6 bit 7 */
#else
  boolean BQue:1;                                      /* Byte 6 bit 7 */
  boolean EncServ:1;                                   /* Byte 6 bit 6 */
  boolean VS:1;                                        /* Byte 6 bit 5 */
  boolean MultiP:1;                                    /* Byte 6 bit 4 */
  boolean MChngr:1; /* Media Changer */                /* Byte 6 bit 3 */
  boolean Obs6_2:1; /* obsolete */                     /* Byte 6 bit 2 */
  boolean Obs6_1:1;                                    /* Byte 6 bit 1 */
  boolean ADDR16:1;                                    /* Byte 6 bit 0 */
#endif
#ifdef LITTLE_ENDIAN_BITFIELDS
  boolean SftRe:1;					/* Byte 7 Bit 0 */
  boolean CmdQue:1;					/* Byte 7 Bit 1 */
  boolean :1;						/* Byte 7 Bit 2 */
  boolean Linked:1;					/* Byte 7 Bit 3 */
  boolean Sync:1;					/* Byte 7 Bit 4 */
  boolean WBus16:1;					/* Byte 7 Bit 5 */
  boolean WBus32:1;					/* Byte 7 Bit 6 */
  boolean RelAdr:1;					/* Byte 7 Bit 7 */
#else
  boolean RelAdr:1;					/* Byte 7 Bit 7 */
  boolean WBus32:1;					/* Byte 7 Bit 6 */
  boolean WBus16:1;					/* Byte 7 Bit 5 */
  boolean Sync:1;					/* Byte 7 Bit 4 */
  boolean Linked:1;					/* Byte 7 Bit 3 */
  boolean :1;						/* Byte 7 Bit 2 */
  boolean CmdQue:1;					/* Byte 7 Bit 1 */
  boolean SftRe:1;					/* Byte 7 Bit 0 */
#endif