/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*-
 * ex: set softtabstop=4 tabstop=8 expandtab shiftwidth=4: *
 * Editor Settings: expandtabs and use 4 spaces for indentation */

/*
 * Copyright Likewise Software
 * All rights reserved.
 *
 * 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 2 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/>.
 *
 * LIKEWISE SOFTWARE MAKES THIS SOFTWARE AVAILABLE UNDER OTHER LICENSING
 * TERMS AS WELL.  IF YOU HAVE ENTERED INTO A SEPARATE LICENSE AGREEMENT
 * WITH LIKEWISE SOFTWARE, THEN YOU MAY ELECT TO USE THE SOFTWARE UNDER THE
 * TERMS OF THAT SOFTWARE LICENSE AGREEMENT INSTEAD OF THE TERMS OF THE GNU
 * GENERAL PUBLIC LICENSE, NOTWITHSTANDING THE ABOVE NOTICE.  IF YOU
 * HAVE QUESTIONS, OR WISH TO REQUEST A COPY OF THE ALTERNATE LICENSING
 * TERMS OFFERED BY LIKEWISE SOFTWARE, PLEASE CONTACT LIKEWISE SOFTWARE AT
 * license@likewisesoftware.com
 */

/*
 * Copyright (C) Likewise Software. All rights reserved.
 *
 * Module Name:
 *
 *        fileNameInfo.c
 *
 * Abstract:
 *
 *        Likewise Posix File System Driver (PVFS)
 *
 *        FileNameInformation Handler
 *
 * Authors: Gerald Carter <gcarter@likewise.com>
 */

#include "pvfs.h"

/* Forward declarations */

static
NTSTATUS
PvfsQueryFileNameInfo(
    PPVFS_IRP_CONTEXT pIrpContext
    );


/* File Globals */



/* Code */


NTSTATUS
PvfsFileNameInfo(
    PVFS_INFO_TYPE Type,
    PPVFS_IRP_CONTEXT pIrpContext
    )
{
    NTSTATUS ntError = STATUS_UNSUCCESSFUL;

    switch(Type)
    {
    case PVFS_SET:
        ntError = STATUS_NOT_SUPPORTED;
        break;

    case PVFS_QUERY:
        ntError = PvfsQueryFileNameInfo(pIrpContext);
        break;

    default:
        ntError = STATUS_INVALID_PARAMETER;
        break;
    }
    BAIL_ON_NT_STATUS(ntError);

cleanup:
    return ntError;

error:
    goto cleanup;
}

static
NTSTATUS
PvfsQueryFileNameInfo(
    PPVFS_IRP_CONTEXT pIrpContext
    )
{
    NTSTATUS ntError = STATUS_UNSUCCESSFUL;
    PIRP pIrp = pIrpContext->pIrp;
    PPVFS_CCB pCcb = NULL;
    PFILE_NAME_INFORMATION pFileInfo = NULL;
    const IRP_ARGS_QUERY_SET_INFORMATION* pArgs =
        &pIrpContext->pIrp->Args.QuerySetInformation;
    PWSTR pwszFilename  = NULL;
    ULONG W16FilenameLen = 0;
    ULONG W16FilenameLenBytes = 0;
    ULONG FixedSize = LW_FIELD_OFFSET(FILE_NAME_INFORMATION, FileName);
    PSTR pszWinFileName = NULL;
    PSTR pszCursor = NULL;

    /* Sanity checks */

    ntError = PvfsAcquireCCB(pIrp->FileHandle, &pCcb);
    BAIL_ON_NT_STATUS(ntError);

    BAIL_ON_INVALID_PTR(pArgs->FileInformation, ntError);

    /* No access check needed for this call */

    if (pArgs->Length < FixedSize)
    {
        ntError = STATUS_BUFFER_TOO_SMALL;
        BAIL_ON_NT_STATUS(ntError);
    }

    pFileInfo = (PFILE_NAME_INFORMATION)pArgs->FileInformation;

    /* Real work starts here */

    /* Name */

    ntError = LwRtlCStringDuplicate(&pszWinFileName, pCcb->pScb->pOwnerFcb->pszFilename);
    BAIL_ON_NT_STATUS(ntError);

    /* Convert to a Windows pathname equivalent */
    for (pszCursor=pszWinFileName; pszCursor && *pszCursor; pszCursor++)
    {
        if (*pszCursor == '/')
        {
            *pszCursor = '\\';
        }
    }

    ntError = LwRtlWC16StringAllocateFromCString(&pwszFilename, pszWinFileName);
    BAIL_ON_NT_STATUS(ntError);

    W16FilenameLen = RtlWC16StringNumChars(pwszFilename);
    W16FilenameLenBytes = W16FilenameLen * sizeof(WCHAR);
    pFileInfo->FileNameLength = W16FilenameLenBytes;

    if (W16FilenameLenBytes > (pArgs->Length - FixedSize))
    {
        W16FilenameLenBytes = pArgs->Length - FixedSize;
        ntError = STATUS_BUFFER_OVERFLOW;
    }

    memcpy(pFileInfo->FileName, pwszFilename, W16FilenameLenBytes);

    pIrp->IoStatusBlock.BytesTransferred = FixedSize + W16FilenameLenBytes;

cleanup:
    LwRtlCStringFree(&pszWinFileName);
    LwRtlWC16StringFree(&pwszFilename);

    if (pCcb)
    {
        PvfsReleaseCCB(pCcb);
    }

    return ntError;

error:
    goto cleanup;
}
