/*
Bacula® - The Network Backup Solution
Copyright (C) 2006-2007 Free Software Foundation Europe e.V.
The main author of Bacula is Kern Sibbald, with contributions from
many others, a complete list can be found in the file AUTHORS.
This program is Free Software; you can redistribute it and/or
modify it under the terms of version two of the GNU General Public
License as published by the Free Software Foundation and included
in the file LICENSE.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
Bacula® is a registered trademark of John Walker.
The licensor of Bacula is the Free Software Foundation Europe
(FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
Switzerland, email:ftf@fsfeurope.org.
*/
/*
* mtops.cpp - Emulate the Linux st (scsi tape) driver on Microsoft Windows.
*
* Author: Robert Nelson, May, 2006 <robertn@the-nelsons.org>
*
* Version $Id: mtops.cpp 5358 2007-08-15 16:54:21Z kerns $
*
* This file was contributed to the Bacula project by Robert Nelson.
*
* Robert Nelson has been granted a perpetual, worldwide,
* non-exclusive, no-charge, royalty-free, irrevocable copyright
* license to reproduce, prepare derivative works of, publicly
* display, publicly perform, sublicense, and distribute the original
* work contributed by Robert Nelson to the Bacula project in source
* or object form.
*
* If you wish to license contributions from Robert Nelson
* under an alternate open source license please contact
* Robert Nelson <robertn@the-nelsons.org>.
*/
#include <stdarg.h>
#include <stddef.h>
#include "bacula.h" /* pull in global headers */
#include "stored.h" /* pull in Storage Deamon headers */
#include "sys/mtio.h"
#if defined(_MSC_VER)
#include <winioctl.h>
#else
#include <ntddstor.h>
#endif
#include <ntddscsi.h>
//
// SCSI bus status codes.
//
#define SCSISTAT_GOOD 0x00
#define SCSISTAT_CHECK_CONDITION 0x02
#define SCSISTAT_CONDITION_MET 0x04
#define SCSISTAT_BUSY 0x08
#define SCSISTAT_INTERMEDIATE 0x10
#define SCSISTAT_INTERMEDIATE_COND_MET 0x14
#define SCSISTAT_RESERVATION_CONFLICT 0x18
#define SCSISTAT_COMMAND_TERMINATED 0x22
#define SCSISTAT_QUEUE_FULL 0x28
inline SHORT Read16BitSigned(const unsigned char *pValue)
{
return (SHORT)(((USHORT)pValue[0] << 8) | (USHORT)pValue[1]);
}
inline USHORT Read16BitUnsigned(const unsigned char *pValue)
{
return (((USHORT)pValue[0] << 8) | (USHORT)pValue[1]);
}
inline LONG Read24BitSigned(const unsigned char *pValue)
{
return ((LONG)(((ULONG)pValue[0] << 16) | ((ULONG)pValue[1] << 8) |
(ULONG)pValue[2])) << 8 >> 8;
}
inline ULONG Read24BitUnsigned(const unsigned char *pValue)
{
return ((ULONG)pValue[0] << 16) | ((ULONG)pValue[1] << 8) | (ULONG)pValue[2];
}
inline LONG Read32BitSigned(const unsigned char *pValue)
{
return (LONG)(((ULONG)pValue[0] << 24) | ((ULONG)pValue[1] << 16) |
((ULONG)pValue[2] << 8) | (ULONG)pValue[3]);
}
inline ULONG Read32BitUnsigned(const unsigned char *pValue)
{
return (((ULONG)pValue[0] << 24) | ((ULONG)pValue[1] << 16) |
((ULONG)pValue[2] << 8) | (ULONG)pValue[3]);
}
inline LONGLONG Read64BitSigned(const unsigned char *pValue)
{
return (LONGLONG)(((ULONGLONG)pValue[0] << 56) | ((ULONGLONG)pValue[1] << 48) |
((ULONGLONG)pValue[2] << 40) | ((ULONGLONG)pValue[3] << 32) |
((ULONGLONG)pValue[4] << 24) | ((ULONGLONG)pValue[5] << 16) |
((ULONGLONG)pValue[6] << 8) | (ULONGLONG)pValue[7]);
}
inline ULONGLONG Read64BitUnsigned(const unsigned char *pValue)
{
return (LONGLONG)(((ULONGLONG)pValue[0] << 56) | ((ULONGLONG)pValue[1] << 48) |
((ULONGLONG)pValue[2] << 40) | ((ULONGLONG)pValue[3] << 32) |
((ULONGLONG)pValue[4] << 24) | ((ULONGLONG)pValue[5] << 16) |
((ULONGLONG)pValue[6] << 8) | (ULONGLONG)pValue[7]);
}
typedef struct _TAPE_POSITION_INFO
{
UCHAR AtPartitionStart:1;
UCHAR AtPartitionEnd:1;
UCHAR PartitionBlockValid:1;
UCHAR FileSetValid:1;
UCHAR :4;
UCHAR Reserved1[3];
ULONG Partition;
ULONGLONG BlockNumber;
ULONGLONG FileNumber;
ULONGLONG SetNumber;
} TAPE_POSITION_INFO, *PTAPE_POSITION_INFO;
typedef struct _TAPE_HANDLE_INFO
{
HANDLE OSHandle;
bool bEOD;
bool bEOF;
bool bEOT;
bool bBlockValid;
ULONG FeaturesLow;
ULONG FeaturesHigh;
ULONG ulFile;
ULONGLONG ullFileStart;
} TAPE_HANDLE_INFO, *PTAPE_HANDLE_INFO;
TAPE_HANDLE_INFO TapeHandleTable[] =
{
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE },
{ INVALID_HANDLE_VALUE }
};
#define NUMBER_HANDLE_ENTRIES (sizeof(TapeHandleTable) / sizeof(TapeHandleTable[0]))
DWORD GetTapePositionInfo(HANDLE hDevice, PTAPE_POSITION_INFO TapePositionInfo);
DWORD GetDensityBlockSize(HANDLE hDevice, DWORD *pdwDensity, DWORD *pdwBlockSize);
int tape_get(int fd, struct mtget *mt_get);
int tape_op(int fd, struct mtop *mt_com);
int tape_pos(int fd, struct mtpos *mt_pos);
int
tape_open(const char *file, int flags, int mode)
{
HANDLE hDevice = INVALID_HANDLE_VALUE;
char szDeviceName[256] = "\\\\.\\";
int idxFile;
DWORD dwResult;
for (idxFile = 0; idxFile < (int)NUMBER_HANDLE_ENTRIES; idxFile++) {
if (TapeHandleTable[idxFile].OSHandle == INVALID_HANDLE_VALUE) {
break;
}
}
if (idxFile >= (int)NUMBER_HANDLE_ENTRIES) {
return EMFILE;
}
memset(&TapeHandleTable[idxFile], 0, sizeof(TapeHandleTable[idxFile]));
if (!IsPathSeparator(file[0])) {
bstrncpy(&szDeviceName[4], file, sizeof(szDeviceName) - 4);
} else {
bstrncpy(&szDeviceName[0], file, sizeof(szDeviceName));
}
hDevice = CreateFile(szDeviceName, FILE_ALL_ACCESS, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hDevice != INVALID_HANDLE_VALUE) {
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[idxFile];
memset(pHandleInfo, 0, sizeof(*pHandleInfo));
pHandleInfo->OSHandle = hDevice;
TAPE_GET_DRIVE_PARAMETERS TapeDriveParameters;
DWORD dwSize = sizeof(TapeDriveParameters);
dwResult = GetTapeParameters(pHandleInfo->OSHandle, GET_TAPE_DRIVE_INFORMATION, &dwSize, &TapeDriveParameters);
if (dwResult == NO_ERROR) {
pHandleInfo->FeaturesLow = TapeDriveParameters.FeaturesLow;
pHandleInfo->FeaturesHigh = TapeDriveParameters.FeaturesHigh;
}
TAPE_POSITION_INFO TapePositionInfo;
dwResult = GetTapePositionInfo(pHandleInfo->OSHandle, &TapePositionInfo);
if (dwResult == NO_ERROR) {
if (TapePositionInfo.AtPartitionStart || TapePositionInfo.AtPartitionEnd ||
(TapePositionInfo.PartitionBlockValid && TapePositionInfo.BlockNumber == 0)) {
pHandleInfo->ulFile = 0;
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = 0;
} else if (TapePositionInfo.FileSetValid) {
pHandleInfo->ulFile = (ULONG)TapePositionInfo.FileNumber;
}
}
} else {
DWORD dwError = GetLastError();
switch (dwError) {
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
errno = ENOENT;
break;
case ERROR_TOO_MANY_OPEN_FILES:
errno = EMFILE;
break;
default:
case ERROR_ACCESS_DENIED:
case ERROR_SHARING_VIOLATION:
case ERROR_LOCK_VIOLATION:
case ERROR_INVALID_NAME:
errno = EACCES;
break;
case ERROR_FILE_EXISTS:
errno = EEXIST;
break;
case ERROR_INVALID_PARAMETER:
errno = EINVAL;
break;
}
return(int) -1;
}
return (int)idxFile + 3;
}
int
tape_read(int fd, void *buffer, unsigned int count)
{
if (buffer == NULL) {
errno = EINVAL;
return -1;
}
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) ||
TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE)
{
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
DWORD bytes_read;
BOOL bResult;
bResult = ReadFile(pHandleInfo->OSHandle, buffer, count, &bytes_read, NULL);
if (bResult) {
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
return bytes_read;
} else {
int iReturnValue = 0;
DWORD last_error = GetLastError();
switch (last_error) {
case ERROR_FILEMARK_DETECTED:
pHandleInfo->bEOF = true;
break;
case ERROR_END_OF_MEDIA:
pHandleInfo->bEOT = true;
break;
case ERROR_NO_MEDIA_IN_DRIVE:
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
errno = ENOMEDIUM;
iReturnValue = -1;
break;
case ERROR_NO_DATA_DETECTED:
pHandleInfo->bEOD = true;
break;
case ERROR_INVALID_HANDLE:
case ERROR_ACCESS_DENIED:
case ERROR_LOCK_VIOLATION:
errno = EBADF;
iReturnValue = -1;
break;
default:
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
errno = EIO;
iReturnValue = -1;
}
return iReturnValue;
}
}
int
tape_write(int fd, const void *buffer, unsigned int count)
{
if (buffer == NULL) {
errno = EINVAL;
return -1;
}
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) || TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE)
{
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
DWORD bytes_written;
BOOL bResult;
bResult = WriteFile(pHandleInfo->OSHandle, buffer, count, &bytes_written, NULL);
if (bResult) {
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
return bytes_written;
} else {
DWORD last_error = GetLastError();
switch (last_error) {
case ERROR_END_OF_MEDIA:
case ERROR_DISK_FULL:
pHandleInfo->bEOT = true;
errno = ENOSPC;
break;
case ERROR_NO_MEDIA_IN_DRIVE:
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
errno = ENOMEDIUM;
break;
case ERROR_INVALID_HANDLE:
case ERROR_ACCESS_DENIED:
errno = EBADF;
break;
default:
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
errno = EIO;
break;
}
return -1;
}
}
int
tape_close(int fd)
{
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) ||
TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE) {
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
if (!CloseHandle(pHandleInfo->OSHandle)) {
pHandleInfo->OSHandle = INVALID_HANDLE_VALUE;
errno = EBADF;
return -1;
}
pHandleInfo->OSHandle = INVALID_HANDLE_VALUE;
return 0;
}
int
tape_ioctl(int fd, unsigned long int request, ...)
{
va_list argp;
int result;
va_start(argp, request);
switch (request) {
case MTIOCTOP:
result = tape_op(fd, va_arg(argp, mtop *));
break;
case MTIOCGET:
result = tape_get(fd, va_arg(argp, mtget *));
break;
case MTIOCPOS:
result = tape_pos(fd, va_arg(argp, mtpos *));
break;
default:
errno = ENOTTY;
result = -1;
break;
}
va_end(argp);
return result;
}
int tape_op(int fd, struct mtop *mt_com)
{
DWORD result = NO_ERROR;
int index;
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) ||
TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE)
{
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
switch (mt_com->mt_op)
{
case MTRESET:
case MTNOP:
case MTSETDRVBUFFER:
break;
default:
case MTRAS1:
case MTRAS2:
case MTRAS3:
case MTSETDENSITY:
errno = ENOTTY;
result = (DWORD)-1;
break;
case MTFSF:
for (index = 0; index < mt_com->mt_count; index++) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, 1, 0, FALSE);
if (result == NO_ERROR) {
pHandleInfo->ulFile++;
pHandleInfo->bEOF = true;
pHandleInfo->bEOT = false;
}
}
break;
case MTBSF:
for (index = 0; index < mt_com->mt_count; index++) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, (DWORD)-1, ~0, FALSE);
if (result == NO_ERROR) {
pHandleInfo->ulFile--;
pHandleInfo->bBlockValid = false;
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
}
}
break;
case MTFSR:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_RELATIVE_BLOCKS, 0, mt_com->mt_count, 0, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
} else if (result == ERROR_FILEMARK_DETECTED) {
pHandleInfo->bEOF = true;
}
break;
case MTBSR:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_RELATIVE_BLOCKS, 0, -mt_com->mt_count, ~0, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
} else if (result == ERROR_FILEMARK_DETECTED) {
pHandleInfo->ulFile--;
pHandleInfo->bBlockValid = false;
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
}
break;
case MTWEOF:
result = WriteTapemark(pHandleInfo->OSHandle, TAPE_FILEMARKS, mt_com->mt_count, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOF = true;
pHandleInfo->bEOT = false;
pHandleInfo->ulFile += mt_com->mt_count;
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = 0;
}
break;
case MTREW:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_REWIND, 0, 0, 0, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->ulFile = 0;
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = 0;
}
break;
case MTOFFL:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_UNLOAD, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->ulFile = 0;
pHandleInfo->ullFileStart = 0;
}
break;
case MTRETEN:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_TENSION, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->ulFile = 0;
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = 0;
}
break;
case MTBSFM:
for (index = 0; index < mt_com->mt_count; index++) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, (DWORD)-1, ~0, FALSE);
if (result == NO_ERROR) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, 1, 0, FALSE);
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
}
}
break;
case MTFSFM:
for (index = 0; index < mt_com->mt_count; index++) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, mt_com->mt_count, 0, FALSE);
if (result == NO_ERROR) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, (DWORD)-1, ~0, FALSE);
pHandleInfo->bEOD = false;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
}
}
break;
case MTEOM:
for ( ; ; ) {
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_FILEMARKS, 0, 1, 0, FALSE);
if (result != NO_ERROR) {
pHandleInfo->bEOF = false;
if (result == ERROR_END_OF_MEDIA) {
pHandleInfo->bEOD = true;
pHandleInfo->bEOT = true;
return 0;
}
if (result == ERROR_NO_DATA_DETECTED) {
pHandleInfo->bEOD = true;
pHandleInfo->bEOT = false;
return 0;
}
break;
} else {
pHandleInfo->bEOF = true;
pHandleInfo->ulFile++;
}
}
break;
case MTERASE:
result = EraseTape(pHandleInfo->OSHandle, TAPE_ERASE_LONG, FALSE);
if (result == NO_ERROR) {
pHandleInfo->bEOD = true;
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->ulFile = 0;
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = 0;
}
break;
case MTSETBLK:
{
TAPE_SET_MEDIA_PARAMETERS SetMediaParameters;
SetMediaParameters.BlockSize = mt_com->mt_count;
result = SetTapeParameters(pHandleInfo->OSHandle, SET_TAPE_MEDIA_INFORMATION, &SetMediaParameters);
}
break;
case MTSEEK:
{
TAPE_POSITION_INFO TapePositionInfo;
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_ABSOLUTE_BLOCK, 0, mt_com->mt_count, 0, FALSE);
memset(&TapePositionInfo, 0, sizeof(TapePositionInfo));
DWORD dwPosResult = GetTapePositionInfo(pHandleInfo->OSHandle, &TapePositionInfo);
if (dwPosResult == NO_ERROR && TapePositionInfo.FileSetValid) {
pHandleInfo->ulFile = (ULONG)TapePositionInfo.FileNumber;
} else {
pHandleInfo->ulFile = ~0U;
}
}
break;
case MTTELL:
{
DWORD partition;
DWORD offset;
DWORD offsetHi;
result = GetTapePosition(pHandleInfo->OSHandle, TAPE_ABSOLUTE_BLOCK, &partition, &offset, &offsetHi);
if (result == NO_ERROR) {
return offset;
}
}
break;
case MTFSS:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_SETMARKS, 0, mt_com->mt_count, 0, FALSE);
break;
case MTBSS:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_SPACE_SETMARKS, 0, -mt_com->mt_count, ~0, FALSE);
break;
case MTWSM:
result = WriteTapemark(pHandleInfo->OSHandle, TAPE_SETMARKS, mt_com->mt_count, FALSE);
break;
case MTLOCK:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_LOCK, FALSE);
break;
case MTUNLOCK:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_UNLOCK, FALSE);
break;
case MTLOAD:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_LOAD, FALSE);
break;
case MTUNLOAD:
result = PrepareTape(pHandleInfo->OSHandle, TAPE_UNLOAD, FALSE);
break;
case MTCOMPRESSION:
{
TAPE_GET_DRIVE_PARAMETERS GetDriveParameters;
TAPE_SET_DRIVE_PARAMETERS SetDriveParameters;
DWORD size;
size = sizeof(GetDriveParameters);
result = GetTapeParameters(pHandleInfo->OSHandle, GET_TAPE_DRIVE_INFORMATION, &size, &GetDriveParameters);
if (result == NO_ERROR)
{
SetDriveParameters.ECC = GetDriveParameters.ECC;
SetDriveParameters.Compression = (BOOLEAN)mt_com->mt_count;
SetDriveParameters.DataPadding = GetDriveParameters.DataPadding;
SetDriveParameters.ReportSetmarks = GetDriveParameters.ReportSetmarks;
SetDriveParameters.EOTWarningZoneSize = GetDriveParameters.EOTWarningZoneSize;
result = SetTapeParameters(pHandleInfo->OSHandle, SET_TAPE_DRIVE_INFORMATION, &SetDriveParameters);
}
}
break;
case MTSETPART:
result = SetTapePosition(pHandleInfo->OSHandle, TAPE_LOGICAL_BLOCK, mt_com->mt_count, 0, 0, FALSE);
break;
case MTMKPART:
if (mt_com->mt_count == 0)
{
result = CreateTapePartition(pHandleInfo->OSHandle, TAPE_INITIATOR_PARTITIONS, 1, 0);
}
else
{
result = CreateTapePartition(pHandleInfo->OSHandle, TAPE_INITIATOR_PARTITIONS, 2, mt_com->mt_count);
}
break;
}
if ((result == NO_ERROR && pHandleInfo->bEOF) ||
(result == ERROR_FILEMARK_DETECTED && mt_com->mt_op == MTFSR)) {
TAPE_POSITION_INFO TapePositionInfo;
if (GetTapePositionInfo(pHandleInfo->OSHandle, &TapePositionInfo) == NO_ERROR) {
pHandleInfo->bBlockValid = true;
pHandleInfo->ullFileStart = TapePositionInfo.BlockNumber;
}
}
switch (result) {
case NO_ERROR:
case (DWORD)-1: /* Error has already been translated into errno */
break;
default:
case ERROR_FILEMARK_DETECTED:
errno = EIO;
break;
case ERROR_END_OF_MEDIA:
pHandleInfo->bEOT = true;
errno = EIO;
break;
case ERROR_NO_DATA_DETECTED:
pHandleInfo->bEOD = true;
errno = EIO;
break;
case ERROR_NO_MEDIA_IN_DRIVE:
pHandleInfo->bEOF = false;
pHandleInfo->bEOT = false;
pHandleInfo->bEOD = false;
errno = ENOMEDIUM;
break;
case ERROR_INVALID_HANDLE:
case ERROR_ACCESS_DENIED:
case ERROR_LOCK_VIOLATION:
errno = EBADF;
break;
}
return result == NO_ERROR ? 0 : -1;
}
int tape_get(int fd, struct mtget *mt_get)
{
TAPE_POSITION_INFO pos_info;
BOOL result;
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) ||
TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE) {
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
if (GetTapePositionInfo(pHandleInfo->OSHandle, &pos_info) != NO_ERROR) {
return -1;
}
DWORD density = 0;
DWORD blocksize = 0;
result = GetDensityBlockSize(pHandleInfo->OSHandle, &density, &blocksize);
if (result != NO_ERROR) {
TAPE_GET_DRIVE_PARAMETERS drive_params;
DWORD size;
size = sizeof(drive_params);
result = GetTapeParameters(pHandleInfo->OSHandle, GET_TAPE_DRIVE_INFORMATION, &size, &drive_params);
if (result == NO_ERROR) {
blocksize = drive_params.DefaultBlockSize;
}
}
mt_get->mt_type = MT_ISSCSI2;
// Partition #
mt_get->mt_resid = pos_info.PartitionBlockValid ? pos_info.Partition : (ULONG)-1;
// Density / Block Size
mt_get->mt_dsreg = ((density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK) |
((blocksize << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK);
mt_get->mt_gstat = 0x00010000; /* Immediate report mode.*/
if (pHandleInfo->bEOF) {
mt_get->mt_gstat |= 0x80000000; // GMT_EOF
}
if (pos_info.PartitionBlockValid && pos_info.BlockNumber == 0) {
mt_get->mt_gstat |= 0x40000000; // GMT_BOT
}
if (pHandleInfo->bEOT) {
mt_get->mt_gstat |= 0x20000000; // GMT_EOT
}
if (pHandleInfo->bEOD) {
mt_get->mt_gstat |= 0x08000000; // GMT_EOD
}
TAPE_GET_MEDIA_PARAMETERS media_params;
DWORD size = sizeof(media_params);
result = GetTapeParameters(pHandleInfo->OSHandle, GET_TAPE_MEDIA_INFORMATION, &size, &media_params);
if (result == NO_ERROR && media_params.WriteProtected) {
mt_get->mt_gstat |= 0x04000000; // GMT_WR_PROT
}
result = GetTapeStatus(pHandleInfo->OSHandle);
if (result != NO_ERROR) {
if (result == ERROR_NO_MEDIA_IN_DRIVE) {
mt_get->mt_gstat |= 0x00040000; // GMT_DR_OPEN
}
} else {
mt_get->mt_gstat |= 0x01000000; // GMT_ONLINE
}
// Recovered Error Count
mt_get->mt_erreg = 0;
// File Number
mt_get->mt_fileno = (__daddr_t)pHandleInfo->ulFile;
// Block Number
mt_get->mt_blkno = (__daddr_t)(pHandleInfo->bBlockValid ? pos_info.BlockNumber - pHandleInfo->ullFileStart : (ULONGLONG)-1);
return 0;
}
#define SERVICEACTION_SHORT_FORM_BLOCKID 0
#define SERVICEACTION_SHORT_FORM_VENDOR_SPECIFIC 1
#define SERVICEACTION_LONG_FORM 6
#define SERVICEACTION_EXTENDED_FORM 8
typedef struct _SCSI_READ_POSITION_SHORT_BUFFER
{
UCHAR :1;
UCHAR PERR:1;
UCHAR BPU:1;
UCHAR :1;
UCHAR BYCU:1;
UCHAR BCU:1;
UCHAR EOP:1;
UCHAR BOP:1;
UCHAR Partition;
UCHAR Reserved1[2];
UCHAR FirstBlock[4];
UCHAR LastBlock[4];
UCHAR Reserved2;
UCHAR NumberBufferBlocks[3];
UCHAR NumberBufferBytes[4];
} SCSI_READ_POSITION_SHORT_BUFFER, *PSCSI_READ_POSITION_SHORT_BUFFER;
typedef struct _SCSI_READ_POSITION_LONG_BUFFER
{
UCHAR :2;
UCHAR BPU:1;
UCHAR MPU:1;
UCHAR :2;
UCHAR EOP:1;
UCHAR BOP:1;
UCHAR Reserved3[3];
UCHAR Partition[4];
UCHAR BlockNumber[8];
UCHAR FileNumber[8];
UCHAR SetNumber[8];
} SCSI_READ_POSITION_LONG_BUFFER, *PSCSI_READ_POSITION_LONG_BUFFER;
typedef struct _SCSI_READ_POSITION_EXTENDED_BUFFER
{
UCHAR :1;
UCHAR PERR:1;
UCHAR LOPU:1;
UCHAR :1;
UCHAR BYCU:1;
UCHAR LOCU:1;
UCHAR EOP:1;
UCHAR BOP:1;
UCHAR Partition;
UCHAR AdditionalLength[2];
UCHAR Reserved1;
UCHAR NumberBufferObjects[3];
UCHAR FirstLogicalObject[8];
UCHAR LastLogicalObject[8];
UCHAR NumberBufferObjectBytes[8];
} SCSI_READ_POSITION_EXTENDED_BUFFER, *PSCSI_READ_POSITION_EXTENDED_BUFFER;
typedef union _READ_POSITION_RESULT {
SCSI_READ_POSITION_SHORT_BUFFER ShortBuffer;
SCSI_READ_POSITION_LONG_BUFFER LongBuffer;
SCSI_READ_POSITION_EXTENDED_BUFFER ExtendedBuffer;
} READ_POSITION_RESULT, *PREAD_POSITION_RESULT;
DWORD GetTapePositionInfo(HANDLE hDevice, PTAPE_POSITION_INFO TapePositionInfo)
{
PSCSI_PASS_THROUGH ScsiPassThrough;
BOOL bResult;
DWORD dwBytesReturned;
const DWORD dwBufferSize = sizeof(SCSI_PASS_THROUGH) + sizeof(READ_POSITION_RESULT) + 28;
memset(TapePositionInfo, 0, sizeof(*TapePositionInfo));
ScsiPassThrough = (PSCSI_PASS_THROUGH)malloc(dwBufferSize);
for (int pass = 0; pass < 2; pass++)
{
memset(ScsiPassThrough, 0, dwBufferSize);
ScsiPassThrough->Length = sizeof(SCSI_PASS_THROUGH);
ScsiPassThrough->CdbLength = 10;
ScsiPassThrough->SenseInfoLength = 28;
ScsiPassThrough->DataIn = 1;
ScsiPassThrough->DataTransferLength = sizeof(SCSI_READ_POSITION_LONG_BUFFER);
ScsiPassThrough->TimeOutValue = 1000;
ScsiPassThrough->DataBufferOffset = sizeof(SCSI_PASS_THROUGH) + 28;
ScsiPassThrough->SenseInfoOffset = sizeof(SCSI_PASS_THROUGH);
ScsiPassThrough->Cdb[0] = 0x34; // READ POSITION
switch (pass)
{
case 0:
ScsiPassThrough->Cdb[1] = SERVICEACTION_LONG_FORM;
break;
case 1:
ScsiPassThrough->Cdb[1] = SERVICEACTION_SHORT_FORM_BLOCKID;
break;
}
bResult = DeviceIoControl( hDevice,
IOCTL_SCSI_PASS_THROUGH,
ScsiPassThrough, sizeof(SCSI_PASS_THROUGH),
ScsiPassThrough, dwBufferSize,
&dwBytesReturned,
NULL);
if (bResult && dwBytesReturned >= (offsetof(SCSI_PASS_THROUGH, ScsiStatus) + sizeof(ScsiPassThrough->ScsiStatus))) {
if (ScsiPassThrough->ScsiStatus == SCSISTAT_GOOD) {
PREAD_POSITION_RESULT pPosResult = (PREAD_POSITION_RESULT)((PUCHAR)ScsiPassThrough + ScsiPassThrough->DataBufferOffset);
switch (pass)
{
case 0: // SERVICEACTION_LONG_FORM
{
TapePositionInfo->AtPartitionStart = pPosResult->LongBuffer.BOP;
TapePositionInfo->AtPartitionEnd = pPosResult->LongBuffer.EOP;
if (!TapePositionInfo->PartitionBlockValid) {
TapePositionInfo->PartitionBlockValid = !pPosResult->LongBuffer.BPU;
if (TapePositionInfo->PartitionBlockValid) {
TapePositionInfo->Partition = Read32BitUnsigned(pPosResult->LongBuffer.Partition);
TapePositionInfo->BlockNumber = Read64BitUnsigned(pPosResult->LongBuffer.BlockNumber);
}
}
TapePositionInfo->FileSetValid = !pPosResult->LongBuffer.MPU;
if (TapePositionInfo->FileSetValid) {
TapePositionInfo->FileNumber = Read64BitUnsigned(pPosResult->LongBuffer.FileNumber);
TapePositionInfo->SetNumber = Read64BitUnsigned(pPosResult->LongBuffer.SetNumber);
}
}
break;
case 1: // SERVICEACTION_SHORT_FORM_BLOCKID
{
// pPosResult->ShortBuffer.PERR;
// pPosResult->ShortBuffer.BYCU;
// pPosResult->ShortBuffer.BCU;
TapePositionInfo->AtPartitionStart = pPosResult->ShortBuffer.BOP;
TapePositionInfo->AtPartitionEnd = pPosResult->ShortBuffer.EOP;
if (!TapePositionInfo->PartitionBlockValid) {
TapePositionInfo->PartitionBlockValid = !pPosResult->ShortBuffer.BPU;
if (TapePositionInfo->PartitionBlockValid) {
TapePositionInfo->Partition = pPosResult->ShortBuffer.Partition;
TapePositionInfo->BlockNumber = Read32BitUnsigned(pPosResult->ShortBuffer.FirstBlock);
}
}
// Read32BitsUnsigned(pPosResult->ShortBuffer.LastBlock);
// Read24BitsUnsigned(pPosResult->ShortBuffer.NumberBufferBlocks);
// Read32BitsUnsigned(pPosResult->ShortBuffer.NumberBufferBytes);
}
break;
}
}
}
}
free(ScsiPassThrough);
return NO_ERROR;
}
DWORD GetDensityBlockSize(HANDLE hDevice, DWORD *pdwDensity, DWORD *pdwBlockSize)
{
DWORD dwBufferSize = sizeof(GET_MEDIA_TYPES) + 5 * sizeof(DEVICE_MEDIA_INFO);
GET_MEDIA_TYPES * pGetMediaTypes = (GET_MEDIA_TYPES *)malloc(dwBufferSize);
BOOL bResult;
DWORD dwResult;
if (pGetMediaTypes == NULL) {
return ERROR_OUTOFMEMORY;
}
do {
DWORD dwBytesReturned;
bResult = DeviceIoControl( hDevice,
IOCTL_STORAGE_GET_MEDIA_TYPES_EX,
NULL, 0,
(LPVOID)pGetMediaTypes, dwBufferSize,
&dwBytesReturned,
NULL);
if (!bResult) {
dwResult = GetLastError();
if (dwResult != ERROR_INSUFFICIENT_BUFFER) {
free(pGetMediaTypes);
return dwResult;
}
dwBufferSize += 6 * sizeof(DEVICE_MEDIA_INFO);
GET_MEDIA_TYPES * pNewBuffer = (GET_MEDIA_TYPES *)realloc(pGetMediaTypes, dwBufferSize);
if (pNewBuffer != pGetMediaTypes) {
free(pGetMediaTypes);
if (pNewBuffer == NULL) {
return ERROR_OUTOFMEMORY;
}
pGetMediaTypes = pNewBuffer;
}
}
} while (!bResult);
if (pGetMediaTypes->DeviceType != FILE_DEVICE_TAPE) {
free(pGetMediaTypes);
return ERROR_BAD_DEVICE;
}
for (DWORD idxMedia = 0; idxMedia < pGetMediaTypes->MediaInfoCount; idxMedia++) {
if (pGetMediaTypes->MediaInfo[idxMedia].DeviceSpecific.TapeInfo.MediaCharacteristics & MEDIA_CURRENTLY_MOUNTED) {
if (pGetMediaTypes->MediaInfo[idxMedia].DeviceSpecific.TapeInfo.BusType == BusTypeScsi) {
*pdwDensity = pGetMediaTypes->MediaInfo[idxMedia].DeviceSpecific.TapeInfo.BusSpecificData.ScsiInformation.DensityCode;
} else {
*pdwDensity = 0;
}
*pdwBlockSize = pGetMediaTypes->MediaInfo[idxMedia].DeviceSpecific.TapeInfo.CurrentBlockSize;
free(pGetMediaTypes);
return NO_ERROR;
}
}
free(pGetMediaTypes);
return ERROR_NO_MEDIA_IN_DRIVE;
}
int tape_pos(int fd, struct mtpos *mt_pos)
{
DWORD partition;
DWORD offset;
DWORD offsetHi;
BOOL result;
if (fd < 3 || fd >= (int)(NUMBER_HANDLE_ENTRIES + 3) ||
TapeHandleTable[fd - 3].OSHandle == INVALID_HANDLE_VALUE) {
errno = EBADF;
return -1;
}
PTAPE_HANDLE_INFO pHandleInfo = &TapeHandleTable[fd - 3];
result = GetTapePosition(pHandleInfo->OSHandle, TAPE_ABSOLUTE_BLOCK, &partition, &offset, &offsetHi);
if (result == NO_ERROR) {
mt_pos->mt_blkno = offset;
return 0;
}
return -1;
}
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