ext2lib.h File Reference

#include <fmifs/fmifs.h>

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Functions
BOOLEAN NTAPI	Ext2Chkdsk (IN PUNICODE_STRING DriveRoot, IN PFMIFSCALLBACK Callback, IN BOOLEAN FixErrors, IN BOOLEAN Verbose, IN BOOLEAN CheckOnlyIfDirty, IN BOOLEAN ScanDrive, IN PVOID pUnknown1, IN PVOID pUnknown2, IN PVOID pUnknown3, IN PVOID pUnknown4, IN PULONG ExitStatus)
BOOLEAN NTAPI	Ext2Format (IN PUNICODE_STRING DriveRoot, IN PFMIFSCALLBACK Callback, IN BOOLEAN QuickFormat, IN BOOLEAN BackwardCompatible, IN MEDIA_TYPE MediaType, IN PUNICODE_STRING Label, IN ULONG ClusterSize)

Function Documentation

Ext2Chkdsk()

BOOLEAN NTAPI Ext2Chkdsk	(	IN PUNICODE_STRING	DriveRoot,
		IN PFMIFSCALLBACK	Callback,
		IN BOOLEAN	FixErrors,
		IN BOOLEAN	Verbose,
		IN BOOLEAN	CheckOnlyIfDirty,
		IN BOOLEAN	ScanDrive,
		IN PVOID	pUnknown1,
		IN PVOID	pUnknown2,
		IN PVOID	pUnknown3,
		IN PVOID	pUnknown4,
		IN PULONG	ExitStatus
	)

Definition at line 1007 of file Mke2fs.c.

{
    UNIMPLEMENTED;
    *ExitStatus = (ULONG)STATUS_SUCCESS;
    return TRUE;
}

Ext2Format()

BOOLEAN NTAPI Ext2Format	(	IN PUNICODE_STRING	DriveRoot,
		IN PFMIFSCALLBACK	Callback,
		IN BOOLEAN	QuickFormat,
		IN BOOLEAN	BackwardCompatible,
		IN MEDIA_TYPE	MediaType,
		IN PUNICODE_STRING	Label,
		IN ULONG	ClusterSize
	)

Definition at line 803 of file Mke2fs.c.

{
    BOOLEAN    bRet;
    NTSTATUS   Status = STATUS_UNSUCCESSFUL;
    /* Super Block: 1024 bytes long */
    EXT2_SUPER_BLOCK Ext2Sb;
    /* File Sys Structure */
    EXT2_FILESYS     FileSys;
    ULONG Percent;
    ULONG rsv;
    ULONG blocks;
    ULONG start;
    ULONG ret_blk;

    // FIXME:
    UNREFERENCED_PARAMETER(BackwardCompatible);
    UNREFERENCED_PARAMETER(MediaType);

    if (Callback != NULL)
    {
        Callback(PROGRESS, 0, (PVOID)&Percent);
    }


    RtlZeroMemory(&Ext2Sb, sizeof(EXT2_SUPER_BLOCK));
    RtlZeroMemory(&FileSys, sizeof(EXT2_FILESYS));
    FileSys.ext2_sb = &Ext2Sb;


    if (!NT_SUCCESS(Ext2OpenDevice(&FileSys, DriveRoot)))
    {
        DPRINT1("Mke2fs: Volume %wZ does not exist, ...\n", DriveRoot);
        goto clean_up;
    }


    if (!NT_SUCCESS(Ext2GetMediaInfo(&FileSys)))
    {
        DPRINT1("Mke2fs: Can't get media information\n");
        goto clean_up;
    }

    set_fs_defaults(NULL, &Ext2Sb, ClusterSize, &inode_ratio);

    Ext2Sb.s_blocks_count = FileSys.PartInfo.PartitionLength.QuadPart /
                            EXT2_BLOCK_SIZE(&Ext2Sb);


    /*
     * Calculate number of inodes based on the inode ratio
     */
    Ext2Sb.s_inodes_count =
        (ULONG)(((LONGLONG) Ext2Sb.s_blocks_count * EXT2_BLOCK_SIZE(&Ext2Sb)) / inode_ratio);

    /*
     * Calculate number of blocks to reserve
     */
    Ext2Sb.s_r_blocks_count = (Ext2Sb.s_blocks_count * 5) / 100;


    Status = Ext2LockVolume(&FileSys);
    if (NT_SUCCESS(Status))
    {
        bLocked = TRUE;
    }

    Status = STATUS_UNSUCCESSFUL;

    // Initialize 
    if (!ext2_initialize_sb(&FileSys))
    {
        DPRINT1("Mke2fs: error...\n");
        goto clean_up;
    }


    zap_sector(&FileSys, 2, 6);

    /*
     * Generate a UUID for it...
     */
    {
        __u8  uuid[16];
        uuid_generate(&uuid[0]);
        memcpy(&Ext2Sb.s_uuid[0], &uuid[0], 16);
    }

    /*
     * Add "jitter" to the superblock's check interval so that we
     * don't check all the filesystems at the same time.  We use a
     * kludgy hack of using the UUID to derive a random jitter value.
     */
    {
        ULONG i, val;

        for (i = 0, val = 0 ; i < sizeof(Ext2Sb.s_uuid); i++)
            val += Ext2Sb.s_uuid[i];

        Ext2Sb.s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
    }

    /*
     * Set the volume label...
     */
    if (Label)
    {
        ANSI_STRING ansi_label;
        ansi_label.MaximumLength = sizeof(Ext2Sb.s_volume_name);
        ansi_label.Length = 0;
        ansi_label.Buffer = Ext2Sb.s_volume_name;
        RtlUnicodeStringToAnsiString(&ansi_label, Label, FALSE);
    }

    ext2_print_super(&Ext2Sb);

    bRet = ext2_allocate_tables(&FileSys);
    if (!bRet)
    {
        goto clean_up;
    }

    /* rsv must be a power of two (64kB is MD RAID sb alignment) */
    rsv = 65536 / FileSys.blocksize;
    blocks = Ext2Sb.s_blocks_count;

#ifdef ZAP_BOOTBLOCK
    DPRINT1("Mke2fs: zeroing volume boot record\n");
    zap_sector(&FileSys, 0, 2);
#endif

    /*
     * Wipe out any old MD RAID (or other) metadata at the end
     * of the device.  This will also verify that the device is
     * as large as we think.  Be careful with very small devices.
     */

    start = (blocks & ~(rsv - 1));
    if (start > rsv)
        start -= rsv;

    bRet = TRUE;
    if (start > 0)
        bRet = zero_blocks(&FileSys, start, blocks - start, &ret_blk, NULL);

    if (!bRet)
    {
        DPRINT1("Mke2fs: zeroing block %lu at end of filesystem", ret_blk);
        goto clean_up;
    }

    write_inode_tables(&FileSys);

    create_root_dir(&FileSys);
    create_lost_and_found(&FileSys);

    ext2_reserve_inodes(&FileSys);

    create_bad_block_inode(&FileSys, NULL);

    DPRINT("Mke2fs: Writing superblocks and filesystem accounting information ... \n");

    if (!QuickFormat)
    {
        DPRINT1("Mke2fs: Slow format not supported yet\n");
    }

    if (!ext2_flush(&FileSys))
    {
        DPRINT1("Mke2fs: Warning, had trouble writing out superblocks.\n");
        goto clean_up;
    }

    DPRINT("Mke2fs: Writing superblocks and filesystem accounting information done!\n");

    Status = STATUS_SUCCESS;

clean_up:

    // Clean up ...
    ext2_free_group_desc(&FileSys);

    ext2_free_block_bitmap(&FileSys);
    ext2_free_inode_bitmap(&FileSys);

    if(bLocked)
    {
        Ext2DisMountVolume(&FileSys);
        Ext2UnLockVolume(&FileSys);
    }

    Ext2CloseDevice(&FileSys);

    return NT_SUCCESS(Status);
}