root / Whitix / branches / network / include / sdevice.h

/*  This file is part of Whitix.
 *
 *  Whitix 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.
 *
 *  Whitix 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 Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifndef SDEVICE_H
#define SDEVICE_H

#include <typedefs.h>
#include <llist.h>

/* Common interface to storage devices for the block cache code */
struct StorageDevice
{
        char* name;
        int (*request)(void* data);
        WORD blockSize,softBlockSize;
        struct ListHead list,requestList,blockList;
        void* priv;
        int totalSectors,partIndex; /* For partition code */

        /* Hardware information - may not apply for some storage devices */
        DWORD heads,sectors,cylinders;
};

/* For user-space */
struct StorageGeom
{
        DWORD heads,sectors,cylinders;
}PACKED;

int StorageAddDevice(struct StorageDevice* dev);
int StorageRemoveDevice(struct StorageDevice* dev);

int StorageQueueInit(struct StorageDevice* dev);
struct Request* StorageGetCurrRequest(struct StorageDevice* dev);
int StorageDoRequest(struct StorageDevice* dev,struct Request* request);
int StorageQueueDestroy(struct StorageDevice* dev);
int StorageEndRequest(struct StorageDevice* device,int status);

/* Many of the properties of block device IoCtl's can be abstracted */

int StorageIoCtl(struct StorageDevice* dev,unsigned long code,char* data);

/* Block ioctls */
#define IOCTL_BLOCK_GETBLKSIZE          0x00000001
#define IOCTL_BLOCK_GETGEOM                     0x00000002

#endif