fsrec.h File Reference

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Functions
NTSTATUS	GetFileSystemName_UStr (IN PUNICODE_STRING PartitionPath OPTIONAL, IN HANDLE PartitionHandle OPTIONAL, IN OUT PWSTR FileSystemName, IN SIZE_T FileSystemNameSize)
NTSTATUS	GetFileSystemName (IN PCWSTR PartitionPath OPTIONAL, IN HANDLE PartitionHandle OPTIONAL, IN OUT PWSTR FileSystemName, IN SIZE_T FileSystemNameSize)
NTSTATUS	InferFileSystem (IN PCWSTR PartitionPath OPTIONAL, IN HANDLE PartitionHandle OPTIONAL, IN OUT PWSTR FileSystemName, IN SIZE_T FileSystemNameSize)
UCHAR	FileSystemToMBRPartitionType (IN PCWSTR FileSystem, IN ULONGLONG StartSector, IN ULONGLONG SectorCount)

Function Documentation

FileSystemToMBRPartitionType()

UCHAR FileSystemToMBRPartitionType	(	IN PCWSTR	FileSystem,
		IN ULONGLONG	StartSector,
		IN ULONGLONG	SectorCount
	)

Definition at line 333 of file fsrec.c.

{
    ASSERT(FileSystem);
 
    if (SectorCount == 0)
        return PARTITION_ENTRY_UNUSED;
 
    if (wcsicmp(FileSystem, L"FAT")   == 0 ||
        wcsicmp(FileSystem, L"FAT32") == 0 ||
        wcsicmp(FileSystem, L"RAW")   == 0)
    {
        if (SectorCount < 8192ULL)
        {
            /* FAT12 CHS partition (disk is smaller than 4.1MB) */
            return PARTITION_FAT_12;
        }
        else if (StartSector < 1450560ULL)
        {
            /* Partition starts below the 8.4GB boundary ==> CHS partition */
 
            if (SectorCount < 65536ULL)
            {
                /* FAT16 CHS partition (partition size < 32MB) */
                return PARTITION_FAT_16;
            }
            else if (SectorCount < 1048576ULL)
            {
                /* FAT16 CHS partition (partition size < 512MB) */
                return PARTITION_HUGE;
            }
            else
            {
                /* FAT32 CHS partition (partition size >= 512MB) */
                return PARTITION_FAT32;
            }
        }
        else
        {
            /* Partition starts above the 8.4GB boundary ==> LBA partition */
 
            if (SectorCount < 1048576ULL)
            {
                /* FAT16 LBA partition (partition size < 512MB) */
                return PARTITION_XINT13;
            }
            else
            {
                /* FAT32 LBA partition (partition size >= 512MB) */
                return PARTITION_FAT32_XINT13;
            }
        }
    }
    else if (wcsicmp(FileSystem, L"NTFS") == 0)
    {
        return PARTITION_IFS;
    }
    else if (wcsicmp(FileSystem, L"BTRFS") == 0 ||
             wcsicmp(FileSystem, L"EXT2")  == 0 ||
             wcsicmp(FileSystem, L"EXT3")  == 0 ||
             wcsicmp(FileSystem, L"EXT4")  == 0)
    {
        return PARTITION_LINUX;
    }
    else
    {
        /* Unknown file system */
        DPRINT1("Unknown file system '%S'\n", FileSystem);
        return PARTITION_ENTRY_UNUSED;
    }
}

Referenced by FormatPartition(), and InitializePartitionEntry().

GetFileSystemName()

NTSTATUS GetFileSystemName	(	IN PCWSTR PartitionPath	OPTIONAL,
		IN HANDLE PartitionHandle	OPTIONAL,
		IN OUT PWSTR	FileSystemName,
		IN SIZE_T	FileSystemNameSize
	)

Definition at line 112 of file fsrec.c.

{
    UNICODE_STRING PartitionPathU;
 
    if (PartitionPath && PartitionHandle)
        return STATUS_INVALID_PARAMETER;
 
    if (PartitionPath)
        RtlInitUnicodeString(&PartitionPathU, PartitionPath);
 
    return GetFileSystemName_UStr(PartitionPath ? &PartitionPathU : NULL,
                                  PartitionPath ? NULL : PartitionHandle,
                                  FileSystemName,
                                  FileSystemNameSize);
}

GetFileSystemName_UStr()

NTSTATUS GetFileSystemName_UStr	(	IN PUNICODE_STRING PartitionPath	OPTIONAL,
		IN HANDLE PartitionHandle	OPTIONAL,
		IN OUT PWSTR	FileSystemName,
		IN SIZE_T	FileSystemNameSize
	)

Definition at line 55 of file fsrec.c.

{
    NTSTATUS Status;
    OBJECT_ATTRIBUTES ObjectAttributes;
    IO_STATUS_BLOCK IoStatusBlock;
 
    if (PartitionPath && PartitionHandle)
        return STATUS_INVALID_PARAMETER;
 
    /* Open the partition if a path has been given;
     * otherwise just use the provided handle. */
    if (PartitionPath)
    {
        InitializeObjectAttributes(&ObjectAttributes,
                                   PartitionPath,
                                   OBJ_CASE_INSENSITIVE,
                                   NULL,
                                   NULL);
        Status = NtOpenFile(&PartitionHandle,
                            FILE_GENERIC_READ /* | SYNCHRONIZE */,
                            &ObjectAttributes,
                            &IoStatusBlock,
                            FILE_SHARE_READ | FILE_SHARE_WRITE,
                            0 /* FILE_SYNCHRONOUS_IO_NONALERT */);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("Failed to open partition '%wZ', Status 0x%08lx\n",
                    PartitionPath, Status);
            return Status;
        }
    }
 
    /* Retrieve the FS attributes */
    Status = GetFileSystemNameWorker(PartitionHandle,
                                     &IoStatusBlock,
                                     FileSystemName,
                                     FileSystemNameSize);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("GetFileSystemName() failed for partition '%wZ' (0x%p), Status 0x%08lx\n",
                PartitionPath, PartitionHandle, Status);
    }
 
    if (PartitionPath)
    {
        /* Close the partition */
        NtClose(PartitionHandle);
    }
 
    return Status;
}

Referenced by GetFileSystemName(), and InferFileSystemWorker().

InferFileSystem()

NTSTATUS InferFileSystem	(	IN PCWSTR PartitionPath	OPTIONAL,
		IN HANDLE PartitionHandle	OPTIONAL,
		IN OUT PWSTR	FileSystemName,
		IN SIZE_T	FileSystemNameSize
	)

Definition at line 269 of file fsrec.c.

{
    NTSTATUS Status;
    UNICODE_STRING PartitionPathU;
    OBJECT_ATTRIBUTES ObjectAttributes;
    IO_STATUS_BLOCK IoStatusBlock;
 
    if (PartitionPath && PartitionHandle)
        return STATUS_INVALID_PARAMETER;
 
    /* Open the partition if a path has been given;
     * otherwise just use the provided handle. */
    if (PartitionPath)
    {
        RtlInitUnicodeString(&PartitionPathU, PartitionPath);
        InitializeObjectAttributes(&ObjectAttributes,
                                   &PartitionPathU,
                                   OBJ_CASE_INSENSITIVE,
                                   NULL,
                                   NULL);
        Status = NtOpenFile(&PartitionHandle,
                            FILE_GENERIC_READ /* | SYNCHRONIZE */,
                            &ObjectAttributes,
                            &IoStatusBlock,
                            FILE_SHARE_READ | FILE_SHARE_WRITE,
                            0 /* FILE_SYNCHRONOUS_IO_NONALERT */);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("Failed to open partition '%S', Status 0x%08lx\n",
                    PartitionPath, Status);
            return Status;
        }
    }
 
    /* Retrieve the FS */
    Status = InferFileSystemWorker(PartitionHandle,
                                   &IoStatusBlock,
                                   FileSystemName,
                                   FileSystemNameSize);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("InferFileSystem() failed for partition '%S' (0x%p), Status 0x%08lx\n",
                PartitionPath, PartitionHandle, Status);
    }
    else
    {
        DPRINT1("InferFileSystem(): FileSystem (guessed): %S\n",
                *FileSystemName ? FileSystemName : L"None");
    }
 
    if (PartitionPath)
    {
        /* Close the partition */
        NtClose(PartitionHandle);
    }
 
    return Status;
}

Referenced by AddPartitionToDisk().