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reactos/sdk/lib/fslib/vfatlib/vfatlib.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS VFAT filesystem library
* FILE: lib\fslib\vfatlib\vfatlib.c
* PURPOSE: Main API
* PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
* Aleksey Bragin (aleksey@reactos.org)
* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
*/
/* fsck.fat.c - User interface
Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
Copyright (C) 2008-2014 Daniel Baumann <mail@daniel-baumann.ch>
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 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
The complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL-3 file.
*/
/* INCLUDES *******************************************************************/
#include "vfatlib.h"
#define NDEBUG
#include <debug.h>
/* GLOBALS & FUNCTIONS ********************************************************/
PFMIFSCALLBACK ChkdskCallback = NULL;
ULONG FsCheckFlags;
PVOID FsCheckMemQueue;
ULONG FsCheckTotalFiles;
NTSTATUS
NTAPI
VfatFormat(IN PUNICODE_STRING DriveRoot,
IN FMIFS_MEDIA_FLAG MediaFlag,
IN PUNICODE_STRING Label,
IN BOOLEAN QuickFormat,
IN ULONG ClusterSize,
IN PFMIFSCALLBACK Callback)
{
OBJECT_ATTRIBUTES ObjectAttributes;
DISK_GEOMETRY DiskGeometry;
IO_STATUS_BLOCK Iosb;
HANDLE FileHandle;
PARTITION_INFORMATION PartitionInfo;
FORMAT_CONTEXT Context;
NTSTATUS Status, LockStatus;
DPRINT("VfatFormat(DriveRoot '%wZ')\n", DriveRoot);
Context.TotalSectorCount = 0;
Context.CurrentSectorCount = 0;
Context.Callback = Callback;
Context.Success = FALSE;
Context.Percent = 0;
InitializeObjectAttributes(&ObjectAttributes,
DriveRoot,
0,
NULL,
NULL);
Status = NtOpenFile(&FileHandle,
FILE_GENERIC_READ | FILE_GENERIC_WRITE | SYNCHRONIZE,
&ObjectAttributes,
&Iosb,
FILE_SHARE_READ,
FILE_SYNCHRONOUS_IO_ALERT);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtOpenFile() failed with status 0x%.08x\n", Status);
return Status;
}
Status = NtDeviceIoControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL,
0,
&DiskGeometry,
sizeof(DISK_GEOMETRY));
if (!NT_SUCCESS(Status))
{
DPRINT("IOCTL_DISK_GET_DRIVE_GEOMETRY failed with status 0x%.08x\n", Status);
NtClose(FileHandle);
return Status;
}
if (DiskGeometry.MediaType == FixedMedia)
{
DPRINT("Cylinders %I64d\n", DiskGeometry.Cylinders.QuadPart);
DPRINT("TracksPerCylinder %ld\n", DiskGeometry.TracksPerCylinder);
DPRINT("SectorsPerTrack %ld\n", DiskGeometry.SectorsPerTrack);
DPRINT("BytesPerSector %ld\n", DiskGeometry.BytesPerSector);
DPRINT("DiskSize %I64d\n",
DiskGeometry.Cylinders.QuadPart *
(ULONGLONG)DiskGeometry.TracksPerCylinder *
(ULONGLONG)DiskGeometry.SectorsPerTrack *
(ULONGLONG)DiskGeometry.BytesPerSector);
Status = NtDeviceIoControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
IOCTL_DISK_GET_PARTITION_INFO,
NULL,
0,
&PartitionInfo,
sizeof(PARTITION_INFORMATION));
if (!NT_SUCCESS(Status))
{
DPRINT("IOCTL_DISK_GET_PARTITION_INFO failed with status 0x%.08x\n", Status);
NtClose(FileHandle);
return Status;
}
}
else
{
PartitionInfo.PartitionType = 0;
PartitionInfo.StartingOffset.QuadPart = 0ULL;
PartitionInfo.PartitionLength.QuadPart =
DiskGeometry.Cylinders.QuadPart *
(ULONGLONG)DiskGeometry.TracksPerCylinder *
(ULONGLONG)DiskGeometry.SectorsPerTrack *
(ULONGLONG)DiskGeometry.BytesPerSector;
PartitionInfo.HiddenSectors = 0;
PartitionInfo.PartitionNumber = 0;
PartitionInfo.BootIndicator = FALSE;
PartitionInfo.RewritePartition = FALSE;
PartitionInfo.RecognizedPartition = FALSE;
}
/* If it already has a FAT FS, we'll use that type.
* If it doesn't, we will determine the FAT type based on size and offset */
if (PartitionInfo.PartitionType != PARTITION_FAT_12 &&
PartitionInfo.PartitionType != PARTITION_FAT_16 &&
PartitionInfo.PartitionType != PARTITION_HUGE &&
PartitionInfo.PartitionType != PARTITION_XINT13 &&
PartitionInfo.PartitionType != PARTITION_FAT32 &&
PartitionInfo.PartitionType != PARTITION_FAT32_XINT13)
{
/* Determine the correct type based upon size and offset (copied from usetup) */
if (PartitionInfo.PartitionLength.QuadPart < (4200LL * 1024LL))
{
/* FAT12 CHS partition (disk is smaller than 4.1MB) */
PartitionInfo.PartitionType = PARTITION_FAT_12;
}
else if (PartitionInfo.StartingOffset.QuadPart < (1024LL * 255LL * 63LL * 512LL))
{
/* Partition starts below the 8.4GB boundary ==> CHS partition */
if (PartitionInfo.PartitionLength.QuadPart < (32LL * 1024LL * 1024LL))
{
/* FAT16 CHS partition (partition size < 32MB) */
PartitionInfo.PartitionType = PARTITION_FAT_16;
}
else if (PartitionInfo.PartitionLength.QuadPart < (512LL * 1024LL * 1024LL))
{
/* FAT16 CHS partition (partition size < 512MB) */
PartitionInfo.PartitionType = PARTITION_HUGE;
}
else
{
/* FAT32 CHS partition (partition size >= 512MB) */
PartitionInfo.PartitionType = PARTITION_FAT32;
}
}
else
{
/* Partition starts above the 8.4GB boundary ==> LBA partition */
if (PartitionInfo.PartitionLength.QuadPart < (512LL * 1024LL * 1024LL))
{
/* FAT16 LBA partition (partition size < 512MB) */
PartitionInfo.PartitionType = PARTITION_XINT13;
}
else
{
/* FAT32 LBA partition (partition size >= 512MB) */
PartitionInfo.PartitionType = PARTITION_FAT32_XINT13;
}
}
}
DPRINT("PartitionType 0x%x\n", PartitionInfo.PartitionType);
DPRINT("StartingOffset %I64d\n", PartitionInfo.StartingOffset.QuadPart);
DPRINT("PartitionLength %I64d\n", PartitionInfo.PartitionLength.QuadPart);
DPRINT("HiddenSectors %lu\n", PartitionInfo.HiddenSectors);
DPRINT("PartitionNumber %d\n", PartitionInfo.PartitionNumber);
DPRINT("BootIndicator 0x%x\n", PartitionInfo.BootIndicator);
DPRINT("RewritePartition %d\n", PartitionInfo.RewritePartition);
DPRINT("RecognizedPartition %d\n", PartitionInfo.RecognizedPartition);
if (Callback != NULL)
{
Context.Percent = 0;
Callback (PROGRESS, 0, (PVOID)&Context.Percent);
}
LockStatus = NtFsControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
FSCTL_LOCK_VOLUME,
NULL,
0,
NULL,
0);
if (!NT_SUCCESS(LockStatus))
{
DPRINT1("WARNING: Failed to lock volume for formatting! Format may fail! (Status: 0x%x)\n", LockStatus);
}
if (PartitionInfo.PartitionType == PARTITION_FAT_12)
{
/* FAT12 */
Status = Fat12Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else if (PartitionInfo.PartitionType == PARTITION_FAT_16 ||
PartitionInfo.PartitionType == PARTITION_HUGE ||
PartitionInfo.PartitionType == PARTITION_XINT13)
{
/* FAT16 */
Status = Fat16Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else if (PartitionInfo.PartitionType == PARTITION_FAT32 ||
PartitionInfo.PartitionType == PARTITION_FAT32_XINT13)
{
/* FAT32 */
Status = Fat32Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else
{
Status = STATUS_INVALID_PARAMETER;
}
/* Attempt to dismount formatted volume */
LockStatus = NtFsControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
FSCTL_DISMOUNT_VOLUME,
NULL,
0,
NULL,
0);
if (!NT_SUCCESS(LockStatus))
{
DPRINT1("Failed to umount volume (Status: 0x%x)\n", LockStatus);
}
LockStatus = NtFsControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
FSCTL_UNLOCK_VOLUME,
NULL,
0,
NULL,
0);
if (!NT_SUCCESS(LockStatus))
{
DPRINT1("Failed to unlock volume (Status: 0x%x)\n", LockStatus);
}
NtClose(FileHandle);
if (Callback != NULL)
{
Context.Success = (BOOLEAN)(NT_SUCCESS(Status));
Callback(DONE, 0, (PVOID)&Context.Success);
}
DPRINT("VfatFormat() done. Status 0x%.08x\n", Status);
return Status;
}
VOID
UpdateProgress(PFORMAT_CONTEXT Context,
ULONG Increment)
{
ULONG NewPercent;
Context->CurrentSectorCount += (ULONGLONG)Increment;
NewPercent = (Context->CurrentSectorCount * 100ULL) / Context->TotalSectorCount;
if (NewPercent > Context->Percent)
{
Context->Percent = NewPercent;
if (Context->Callback != NULL)
{
Context->Callback(PROGRESS, 0, &Context->Percent);
}
}
}
VOID
VfatPrintV(PCHAR Format, va_list args)
{
TEXTOUTPUT TextOut;
CHAR TextBuf[512];
_vsnprintf(TextBuf, sizeof(TextBuf), Format, args);
/* Prepare parameters */
TextOut.Lines = 1;
TextOut.Output = TextBuf;
DPRINT1("VfatPrint -- %s", TextBuf);
/* Do the callback */
if (ChkdskCallback)
ChkdskCallback(OUTPUT, 0, &TextOut);
}
VOID
VfatPrint(PCHAR Format, ...)
{
va_list args;
va_start(args, Format);
VfatPrintV(Format, args);
va_end(args);
}
NTSTATUS
NTAPI
VfatChkdsk(IN PUNICODE_STRING DriveRoot,
IN BOOLEAN FixErrors,
IN BOOLEAN Verbose,
IN BOOLEAN CheckOnlyIfDirty,
IN BOOLEAN ScanDrive,
IN PFMIFSCALLBACK Callback)
{
BOOLEAN verify;
BOOLEAN salvage_files;
ULONG free_clusters;
DOS_FS fs;
RtlZeroMemory(&fs, sizeof(fs));
/* Store callback pointer */
ChkdskCallback = Callback;
FsCheckMemQueue = NULL;
/* Set parameters */
FsCheckFlags = 0;
if (Verbose)
FsCheckFlags |= FSCHECK_VERBOSE;
if (FixErrors)
FsCheckFlags |= FSCHECK_READ_WRITE;
FsCheckTotalFiles = 0;
verify = TRUE;
salvage_files = TRUE;
/* Open filesystem and lock it */
fs_open(DriveRoot, FsCheckFlags & FSCHECK_READ_WRITE);
if (CheckOnlyIfDirty && !fs_isdirty())
{
/* Unlock volume if required */
if (FsCheckFlags & FSCHECK_READ_WRITE)
fs_lock(FALSE);
/* No need to check FS */
return (fs_close(FALSE) == 0 ? STATUS_SUCCESS : STATUS_DISK_CORRUPT_ERROR);
}
read_boot(&fs);
if (verify)
VfatPrint("Starting check/repair pass.\n");
while (read_fat(&fs), scan_root(&fs))
qfree(&FsCheckMemQueue);
if (ScanDrive)
fix_bad(&fs);
if (salvage_files)
reclaim_file(&fs);
else
reclaim_free(&fs);
free_clusters = update_free(&fs);
file_unused();
qfree(&FsCheckMemQueue);
if (verify)
{
FsCheckTotalFiles = 0;
VfatPrint("Starting verification pass.\n");
read_fat(&fs);
scan_root(&fs);
reclaim_free(&fs);
qfree(&FsCheckMemQueue);
}
if (fs_changed())
{
if (FsCheckFlags & FSCHECK_READ_WRITE)
{
if (FsCheckFlags & FSCHECK_INTERACTIVE)
{
FixErrors = get_key("yn", "Perform changes ? (y/n)") == 'y';
if (FixErrors)
FsCheckFlags |= FSCHECK_READ_WRITE;
else
FsCheckFlags &= ~FSCHECK_READ_WRITE;
}
else
VfatPrint("Performing changes.\n");
}
else
{
VfatPrint("Leaving filesystem unchanged.\n");
}
}
VfatPrint("%wZ: %u files, %lu/%lu clusters\n", DriveRoot,
FsCheckTotalFiles, fs.data_clusters - free_clusters, fs.data_clusters);
if (FsCheckFlags & FSCHECK_READ_WRITE)
{
/* Dismount the volume */
fs_dismount();
/* Unlock the volume */
fs_lock(FALSE);
}
// https://technet.microsoft.com/en-us/library/cc730714.aspx
// https://support.microsoft.com/en-us/kb/265533
/* Close the volume */
return (fs_close(FsCheckFlags & FSCHECK_READ_WRITE) == 0 ? STATUS_SUCCESS : STATUS_DISK_CORRUPT_ERROR);
}
/* EOF */
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