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reactos/base/setup/lib/fsutil.c
Hermès Bélusca-Maïto 765994c9e3
[SETUPLIB][USETUP] Bring some suggestions from PR #59 in. 
- Use OBJ_CASE_INSENSITIVE when initializing object attributes
  (no actual reason why to keep case sensitivity there).

- Check the success of a RtlStringCchPrintfW call in EnumerateReactOSEntries().

- Explicitly check for returned STATUS_NOT_SUPPORTED from ChkdskPartition()
  or FormatPartition(), and display an appropriate error message.

- Remove some left-over comments but also explain why I kept some
  commented code (mainly for future reference).
2018-10-28 01:08:57 +02:00

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/*
* PROJECT: ReactOS Setup Library
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE: Filesystem support functions
* COPYRIGHT: Copyright 2003-2018 Casper S. Hornstrup (chorns@users.sourceforge.net)
* Copyright 2017-2018 Hermes Belusca-Maito
*/
//
// This is basically the code for listing available FileSystem providers
// (currently hardcoded in a list), and for performing a basic FileSystem
// recognition for a given disk partition.
//
// See also: https://git.reactos.org/?p=reactos.git;a=blob;f=reactos/dll/win32/fmifs/init.c;h=e895f5ef9cae4806123f6bbdd3dfed37ec1c8d33;hb=b9db9a4e377a2055f635b2fb69fef4e1750d219c
// for how to get FS providers in a dynamic way. In the (near) future we may
// consider merging some of this code with us into a fmifs / fsutil / fslib library...
//
/* INCLUDES *****************************************************************/
#include "precomp.h"
#include "fsutil.h"
#include "partlist.h"
#include <fslib/vfatlib.h>
#include <fslib/btrfslib.h>
// #include <fslib/ext2lib.h>
// #include <fslib/ntfslib.h>
#define NDEBUG
#include <debug.h>
FILE_SYSTEM RegisteredFileSystems[] =
{
/* NOTE: The FAT formatter automatically determines
* whether it will use FAT-16 or FAT-32. */
{ L"FAT" , VfatFormat, VfatChkdsk },
#if 0
{ L"FAT32", VfatFormat, VfatChkdsk }, // Do we support specific FAT sub-formats specifications?
{ L"FATX" , VfatxFormat, VfatxChkdsk },
{ L"NTFS" , NtfsFormat, NtfsChkdsk },
{ L"EXT2" , Ext2Format, Ext2Chkdsk },
{ L"EXT3" , Ext2Format, Ext2Chkdsk },
{ L"EXT4" , Ext2Format, Ext2Chkdsk },
#endif
{ L"BTRFS", BtrfsFormatEx, BtrfsChkdskEx },
#if 0
{ L"FFS" , FfsFormat , FfsChkdsk },
{ L"REISERFS", ReiserfsFormat, ReiserfsChkdsk },
#endif
};
/* FUNCTIONS ****************************************************************/
PFILE_SYSTEM
GetRegisteredFileSystems(OUT PULONG Count)
{
*Count = ARRAYSIZE(RegisteredFileSystems);
return RegisteredFileSystems;
}
PFILE_SYSTEM
GetFileSystemByName(
// IN PFILE_SYSTEM_LIST List,
IN PCWSTR FileSystemName)
{
#if 0 // Reenable when the list of registered FSes will again be dynamic
PLIST_ENTRY ListEntry;
PFILE_SYSTEM_ITEM Item;
ListEntry = List->ListHead.Flink;
while (ListEntry != &List->ListHead)
{
Item = CONTAINING_RECORD(ListEntry, FILE_SYSTEM_ITEM, ListEntry);
if (Item->FileSystemName && wcsicmp(FileSystemName, Item->FileSystemName) == 0)
return Item;
ListEntry = ListEntry->Flink;
}
#else
ULONG Count;
PFILE_SYSTEM FileSystems;
FileSystems = GetRegisteredFileSystems(&Count);
if (!FileSystems || Count == 0)
return NULL;
while (Count--)
{
if (FileSystems->FileSystemName && wcsicmp(FileSystemName, FileSystems->FileSystemName) == 0)
return FileSystems;
++FileSystems;
}
#endif
return NULL;
}
//
// FileSystem recognition (using NT OS functionality)
//
#if 0 // FIXME: To be fully enabled when our storage stack & al. will work better!
/* NOTE: Ripped & adapted from base/system/autochk/autochk.c */
static NTSTATUS
_MyGetFileSystem(
IN struct _PARTENTRY* PartEntry,
IN OUT PWSTR FileSystemName,
IN SIZE_T FileSystemNameSize)
{
NTSTATUS Status;
HANDLE FileHandle;
IO_STATUS_BLOCK IoStatusBlock;
PFILE_FS_ATTRIBUTE_INFORMATION FileFsAttribute;
UCHAR Buffer[sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + MAX_PATH * sizeof(WCHAR)];
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING PartitionRootPath;
WCHAR PathBuffer[MAX_PATH];
FileFsAttribute = (PFILE_FS_ATTRIBUTE_INFORMATION)Buffer;
/* Set PartitionRootPath */
RtlStringCchPrintfW(PathBuffer, ARRAYSIZE(PathBuffer),
// L"\\Device\\Harddisk%lu\\Partition%lu", // Should work! But because ReactOS sucks atm. it actually doesn't work!!
L"\\Device\\Harddisk%lu\\Partition%lu\\", // HACK: Use this as a temporary hack!
PartEntry->DiskEntry->DiskNumber,
PartEntry->PartitionNumber);
RtlInitUnicodeString(&PartitionRootPath, PathBuffer);
DPRINT("PartitionRootPath: %wZ\n", &PartitionRootPath);
/* Open the partition */
InitializeObjectAttributes(&ObjectAttributes,
&PartitionRootPath,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = NtOpenFile(&FileHandle, // PartitionHandle,
FILE_GENERIC_READ /* | SYNCHRONIZE */,
&ObjectAttributes,
&IoStatusBlock,
FILE_SHARE_READ,
0 /* FILE_SYNCHRONOUS_IO_NONALERT */);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to open partition %wZ, Status 0x%08lx\n", &PartitionRootPath, Status);
return Status;
}
/* Retrieve the FS attributes */
Status = NtQueryVolumeInformationFile(FileHandle,
&IoStatusBlock,
FileFsAttribute,
sizeof(Buffer),
FileFsAttributeInformation);
NtClose(FileHandle);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtQueryVolumeInformationFile failed for partition %wZ, Status 0x%08lx\n", &PartitionRootPath, Status);
return Status;
}
if (FileSystemNameSize * sizeof(WCHAR) < FileFsAttribute->FileSystemNameLength + sizeof(WCHAR))
return STATUS_BUFFER_TOO_SMALL;
RtlCopyMemory(FileSystemName,
FileFsAttribute->FileSystemName,
FileFsAttribute->FileSystemNameLength);
FileSystemName[FileFsAttribute->FileSystemNameLength / sizeof(WCHAR)] = UNICODE_NULL;
return STATUS_SUCCESS;
}
#endif
PFILE_SYSTEM
GetFileSystem(
// IN PFILE_SYSTEM_LIST FileSystemList,
IN struct _PARTENTRY* PartEntry)
{
PFILE_SYSTEM CurrentFileSystem;
PWSTR FileSystemName = NULL;
#if 0 // For code temporarily disabled below
NTSTATUS Status;
WCHAR FsRecFileSystemName[MAX_PATH];
#endif
CurrentFileSystem = PartEntry->FileSystem;
/* We have a file system, return it */
if (CurrentFileSystem != NULL && CurrentFileSystem->FileSystemName != NULL)
return CurrentFileSystem;
DPRINT1("File system not found, try to guess one...\n");
CurrentFileSystem = NULL;
#if 0 // This is an example of old code...
if ((PartEntry->PartitionType == PARTITION_FAT_12) ||
(PartEntry->PartitionType == PARTITION_FAT_16) ||
(PartEntry->PartitionType == PARTITION_HUGE) ||
(PartEntry->PartitionType == PARTITION_XINT13) ||
(PartEntry->PartitionType == PARTITION_FAT32) ||
(PartEntry->PartitionType == PARTITION_FAT32_XINT13))
{
if (CheckFatFormat())
FileSystemName = L"FAT";
else
FileSystemName = NULL;
}
else if (PartEntry->PartitionType == PARTITION_EXT2)
{
if (CheckExt2Format())
FileSystemName = L"EXT2";
else
FileSystemName = NULL;
}
else if (PartEntry->PartitionType == PARTITION_IFS)
{
if (CheckNtfsFormat())
FileSystemName = L"NTFS";
else if (CheckHpfsFormat())
FileSystemName = L"HPFS";
else
FileSystemName = NULL;
}
else
{
FileSystemName = NULL;
}
#endif
#if 0 // FIXME: To be fully enabled when our storage stack & al. work better!
/*
* We don't have one...
*
* Try to infer one using NT file system recognition.
*/
Status = _MyGetFileSystem(PartEntry, FsRecFileSystemName, ARRAYSIZE(FsRecFileSystemName));
if (NT_SUCCESS(Status) && *FsRecFileSystemName)
{
/* Temporary HACK: map FAT32 back to FAT */
if (wcscmp(FsRecFileSystemName, L"FAT32") == 0)
wcscpy(FsRecFileSystemName, L"FAT");
FileSystemName = FsRecFileSystemName;
goto Quit;
}
#endif
/*
* We don't have one...
*
* Try to infer a preferred file system for this partition, given its ID.
*
* WARNING: This is partly a hack, since partitions with the same ID can
* be formatted with different file systems: for example, usual Linux
* partitions that are formatted in EXT2/3/4, ReiserFS, etc... have the
* same partition ID 0x83.
*
* The proper fix is to make a function that detects the existing FS
* from a given partition (not based on the partition ID).
* On the contrary, for unformatted partitions with a given ID, the
* following code is OK.
*/
if ((PartEntry->PartitionType == PARTITION_FAT_12) ||
(PartEntry->PartitionType == PARTITION_FAT_16) ||
(PartEntry->PartitionType == PARTITION_HUGE ) ||
(PartEntry->PartitionType == PARTITION_XINT13) ||
(PartEntry->PartitionType == PARTITION_FAT32 ) ||
(PartEntry->PartitionType == PARTITION_FAT32_XINT13))
{
FileSystemName = L"FAT";
}
else if (PartEntry->PartitionType == PARTITION_LINUX)
{
// WARNING: See the warning above.
FileSystemName = L"BTRFS";
}
else if (PartEntry->PartitionType == PARTITION_IFS)
{
// WARNING: See the warning above.
FileSystemName = L"NTFS"; /* FIXME: Not quite correct! */
// FIXME: We may have HPFS too...
}
#if 0
Quit: // For code temporarily disabled above
#endif
// HACK: WARNING: We cannot write on this FS yet!
if (FileSystemName)
{
if (PartEntry->PartitionType == PARTITION_IFS)
DPRINT1("Recognized file system %S that doesn't support write support yet!\n", FileSystemName);
}
DPRINT1("GetFileSystem -- PartitionType: 0x%02X ; FileSystemName (guessed): %S\n",
PartEntry->PartitionType, FileSystemName ? FileSystemName : L"None");
if (FileSystemName != NULL)
CurrentFileSystem = GetFileSystemByName(FileSystemName);
return CurrentFileSystem;
}
//
// Formatting routines
//
BOOLEAN
PreparePartitionForFormatting(
IN struct _PARTENTRY* PartEntry,
IN PFILE_SYSTEM FileSystem)
{
if (!FileSystem)
{
DPRINT1("No file system specified?\n");
return FALSE;
}
if (wcscmp(FileSystem->FileSystemName, L"FAT") == 0)
{
if (PartEntry->SectorCount.QuadPart < 8192)
{
/* FAT12 CHS partition (disk is smaller than 4.1MB) */
SetPartitionType(PartEntry, PARTITION_FAT_12);
}
else if (PartEntry->StartSector.QuadPart < 1450560)
{
/* Partition starts below the 8.4GB boundary ==> CHS partition */
if (PartEntry->SectorCount.QuadPart < 65536)
{
/* FAT16 CHS partition (partition size < 32MB) */
SetPartitionType(PartEntry, PARTITION_FAT_16);
}
else if (PartEntry->SectorCount.QuadPart < 1048576)
{
/* FAT16 CHS partition (partition size < 512MB) */
SetPartitionType(PartEntry, PARTITION_HUGE);
}
else
{
/* FAT32 CHS partition (partition size >= 512MB) */
SetPartitionType(PartEntry, PARTITION_FAT32);
}
}
else
{
/* Partition starts above the 8.4GB boundary ==> LBA partition */
if (PartEntry->SectorCount.QuadPart < 1048576)
{
/* FAT16 LBA partition (partition size < 512MB) */
SetPartitionType(PartEntry, PARTITION_XINT13);
}
else
{
/* FAT32 LBA partition (partition size >= 512MB) */
SetPartitionType(PartEntry, PARTITION_FAT32_XINT13);
}
}
}
else if (wcscmp(FileSystem->FileSystemName, L"BTRFS") == 0)
{
SetPartitionType(PartEntry, PARTITION_LINUX);
}
#if 0
else if (wcscmp(FileSystem->FileSystemName, L"EXT2") == 0)
{
SetPartitionType(PartEntry, PARTITION_EXT2);
}
else if (wcscmp(FileSystem->FileSystemName, L"NTFS") == 0)
{
SetPartitionType(PartEntry, PARTITION_IFS);
}
#endif
else
{
/* Unknown file system? */
DPRINT1("Unknown file system \"%S\"?\n", FileSystem->FileSystemName);
return FALSE;
}
//
// FIXME: Do this now, or after the partition was actually formatted??
//
/* Set the new partition's file system proper */
PartEntry->FormatState = Formatted; // Well... This may be set after the real formatting takes place (in which case we should change the FormatState to another value)
PartEntry->FileSystem = FileSystem;
return TRUE;
}
/* EOF */
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