Archipelago » blktap-utils

/* 

 * Copyright (c) 2008, XenSource Inc.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *     * Redistributions of source code must retain the above copyright

 *       notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above copyright

 *       notice, this list of conditions and the following disclaimer in the

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 *       may be used to endorse or promote products derived from this software

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 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER

 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

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 */

#ifndef _TAPDISK_DRIVER_H_

#define _TAPDISK_DRIVER_H_

#include "tapdisk.h"

#include "scheduler.h"

#include "tapdisk-queue.h"

#include "tapdisk-loglimit.h"

#define TD_DRIVER_OPEN               0x0001

#define TD_DRIVER_RDONLY             0x0002

struct td_driver_handle {

        int                          type;

        char                        *name;

        int                          storage;

        int                          refcnt;

        td_flag_t                    state;

        td_disk_info_t               info;

        void                        *data;

        const struct tap_disk       *ops;

        td_loglimit_t                loglimit;

        struct list_head             next;

};

td_driver_t *tapdisk_driver_allocate(int, const char *, td_flag_t);

void tapdisk_driver_free(td_driver_t *);

void tapdisk_driver_queue_tiocb(td_driver_t *, struct tiocb *);

void tapdisk_driver_debug(td_driver_t *);

void tapdisk_driver_stats(td_driver_t *, td_stats_t *);

int tapdisk_driver_log_pass(td_driver_t *, const char *caller);

#endif