ext2lib.h File Reference

#include <fmifs/fmifs.h>

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Functions
NTSTATUS NTAPI	Ext2Chkdsk (IN PUNICODE_STRING DriveRoot, IN BOOLEAN FixErrors, IN BOOLEAN Verbose, IN BOOLEAN CheckOnlyIfDirty, IN BOOLEAN ScanDrive, IN PFMIFSCALLBACK Callback)
NTSTATUS NTAPI	Ext2Format (IN PUNICODE_STRING DriveRoot, IN FMIFS_MEDIA_FLAG MediaFlag, IN PUNICODE_STRING Label, IN BOOLEAN QuickFormat, IN ULONG ClusterSize, IN PFMIFSCALLBACK Callback)

Function Documentation

Ext2Chkdsk()

NTSTATUS NTAPI Ext2Chkdsk	(	IN PUNICODE_STRING	DriveRoot,
		IN BOOLEAN	FixErrors,
		IN BOOLEAN	Verbose,
		IN BOOLEAN	CheckOnlyIfDirty,
		IN BOOLEAN	ScanDrive,
		IN PFMIFSCALLBACK	Callback
	)

Definition at line 1008 of file Mke2fs.c.

{
    UNIMPLEMENTED;
    return STATUS_SUCCESS;
}

Ext2Format()

NTSTATUS NTAPI Ext2Format	(	IN PUNICODE_STRING	DriveRoot,
		IN FMIFS_MEDIA_FLAG	MediaFlag,
		IN PUNICODE_STRING	Label,
		IN BOOLEAN	QuickFormat,
		IN ULONG	ClusterSize,
		IN PFMIFSCALLBACK	Callback
	)

Definition at line 803 of file Mke2fs.c.

{
    BOOLEAN    bRet = FALSE;
    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;


    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;
    }


    // 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;

    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))
    {
        bRet = false;
        DPRINT1("Mke2fs: Warning, had trouble writing out superblocks.\n");
        goto clean_up;
    }

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

    bRet = true;
    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);

    if (Callback != NULL)
    {
        Callback(DONE, 0, (PVOID)&bRet);
    }

    return Status;
}