/* Editor Settings: expandtabs and use 4 spaces for indentation
 * ex: set softtabstop=4 tabstop=8 expandtab shiftwidth=4: *
 * -*- mode: c, c-basic-offset: 4 -*- */

/*
 * 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:
 *
 *        driver.c
 *
 * Abstract:
 *
 *        Likewise Posix File System Driver (PVFS)
 *
 *        Driver Entry Function
 *
 * Authors: Krishna Ganugapati (krishnag@likewisesoftware.com)
 *          Sriram Nambakam (snambakam@likewisesoftware.com)
 *          Danilo Almeida (dalmeida@likewisesoftware.com)
 */

#include "rdr.h"

static IO_DEVICE_HANDLE gDeviceHandle = NULL;

static
NTSTATUS
RdrInitialize(
    VOID
    );

static
NTSTATUS
RdrShutdown(
    VOID
    );

VOID
RdrDriverShutdown(
    IN IO_DRIVER_HANDLE DriverHandle
    )
{
    RdrShutdown();

    if (gDeviceHandle)
    {
        IoDeviceDelete(&gDeviceHandle);
    }
}

NTSTATUS
RdrDriverDispatch(
    IN IO_DEVICE_HANDLE DeviceHandle,
    IN PIRP pIrp
    )
{
    NTSTATUS ntStatus = 0;

    switch (pIrp->Type)
    {
    case IRP_TYPE_CREATE:
        ntStatus = RdrCreate(
            DeviceHandle,
            pIrp
            );
        break;

    case IRP_TYPE_CLOSE:
        ntStatus = RdrClose(
            DeviceHandle,
            pIrp
            );
        break;


    case IRP_TYPE_READ:
        ntStatus = RdrRead(
            DeviceHandle,
            pIrp
            );
        break;

    case IRP_TYPE_WRITE:
        ntStatus = RdrWrite(
            DeviceHandle,
            pIrp
            );
        break;

    case IRP_TYPE_DEVICE_IO_CONTROL:
        ntStatus = STATUS_NOT_IMPLEMENTED;
        break;

    case IRP_TYPE_FS_CONTROL:
        ntStatus = RdrFsctl(
            DeviceHandle,
            pIrp
            );
        break;

    case IRP_TYPE_FLUSH_BUFFERS:
        ntStatus = STATUS_NOT_IMPLEMENTED;
        break;

    case IRP_TYPE_QUERY_INFORMATION:
        ntStatus = RdrQueryInformation(
            DeviceHandle,
            pIrp
            );
        break;
    case IRP_TYPE_QUERY_DIRECTORY:
        ntStatus = RdrQueryDirectory(
            DeviceHandle,
            pIrp
            );
        break;
    case IRP_TYPE_QUERY_VOLUME_INFORMATION:
        ntStatus = RdrQueryVolumeInformation(
            DeviceHandle,
            pIrp);
        break;
    case IRP_TYPE_SET_INFORMATION:
        ntStatus = RdrSetInformation(
            DeviceHandle,
            pIrp
            );
        break;
    case IRP_TYPE_QUERY_SECURITY:
        ntStatus = RdrQuerySecurity(
            DeviceHandle,
            pIrp
            );
        break;
    default:
        ntStatus = STATUS_UNSUCCESSFUL;
    }

    return ntStatus;
}

NTSTATUS
IO_DRIVER_ENTRY(rdr)(
    IN IO_DRIVER_HANDLE DriverHandle,
    IN ULONG InterfaceVersion
    )
{
    NTSTATUS ntStatus = 0;

    if (IO_DRIVER_ENTRY_INTERFACE_VERSION != InterfaceVersion)
    {
        ntStatus = STATUS_UNSUCCESSFUL;
        BAIL_ON_NT_STATUS(ntStatus);
    }

    ntStatus = IoDriverInitialize(DriverHandle,
                                  NULL,
                                  RdrDriverShutdown,
                                  RdrDriverDispatch);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = IoDeviceCreate(&gDeviceHandle,
                              DriverHandle,
                              "rdr",
                              NULL);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = RdrInitialize();
    BAIL_ON_NT_STATUS(ntStatus);

error:

    return ntStatus;
}

static
NTSTATUS
RdrInitialize(
    VOID
    )
{
    NTSTATUS ntStatus = 0;

    memset(&gRdrRuntime, 0, sizeof(gRdrRuntime));

    pthread_mutex_init(&gRdrRuntime.socketHashLock, NULL);

    /* Pid used for SMB Header */

    gRdrRuntime.SysPid = getpid();

    ntStatus = SMBPacketCreateAllocator(1, &gRdrRuntime.hPacketAllocator);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = RdrSocketInit();
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = LwRtlCreateThreadPool(&gRdrRuntime.pThreadPool);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = LwRtlCreateTaskGroup(gRdrRuntime.pThreadPool, &gRdrRuntime.pReaderTaskGroup);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = RdrReaperInit(&gRdrRuntime);
    BAIL_ON_NT_STATUS(ntStatus);

error:

    return ntStatus;
}

static
NTSTATUS
RdrShutdown(
    VOID
    )
{
    NTSTATUS ntStatus = 0;

    ntStatus = RdrReaperShutdown(&gRdrRuntime);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = RdrSocketShutdown();
    BAIL_ON_NT_STATUS(ntStatus);

    pthread_mutex_destroy(&gRdrRuntime.socketHashLock);

    if (gRdrRuntime.hPacketAllocator != (HANDLE)NULL)
    {
        SMBPacketFreeAllocator(gRdrRuntime.hPacketAllocator);
    }

error:

    return ntStatus;
}