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/*
* 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
* documentation and/or other materials provided with the distribution.
* * Neither the name of XenSource Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include "tapdisk-driver.h"
#include "tapdisk-server.h"
#include "tapdisk-disktype.h"
td_driver_t *
tapdisk_driver_allocate(int type, char *name, td_flag_t flags, int storage)
{
int err;
td_driver_t *driver;
const struct tap_disk *ops;
ops = tapdisk_disk_drivers[type];
if (!ops)
return NULL;
driver = calloc(1, sizeof(td_driver_t));
if (!driver)
return NULL;
err = tapdisk_namedup(&driver->name, name);
if (err)
goto fail;
driver->ops = ops;
driver->type = type;
driver->storage = storage;
driver->data = calloc(1, ops->private_data_size);
if (!driver->data)
goto fail;
if (td_flag_test(flags, TD_OPEN_RDONLY))
td_flag_set(driver->state, TD_DRIVER_RDONLY);
return driver;
fail:
free(driver->name);
free(driver->data);
free(driver);
return NULL;
}
void
tapdisk_driver_free(td_driver_t *driver)
{
if (!driver)
return;
if (driver->refcnt)
return;
if (td_flag_test(driver->state, TD_DRIVER_OPEN))
EPRINTF("freeing open driver %s (state 0x%08x)\n",
driver->name, driver->state);
free(driver->name);
free(driver->data);
free(driver);
}
void
tapdisk_driver_queue_tiocb(td_driver_t *driver, struct tiocb *tiocb)
{
tapdisk_server_queue_tiocb(tiocb);
}
void
tapdisk_driver_debug(td_driver_t *driver)
{
if (driver->ops->td_debug)
driver->ops->td_debug(driver);
}
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