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https://github.com/xen-project/xen.git
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Keir Fraser
7b4dea5546
Stop coercing drivers/disktype code into the tool stack. Make both blktapctrl and tap-ctl transfer type/path pairs as "<type>:<path>" strings. Remove the message.disktype integer altogether. Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com> Signed-off-by: Jake Wires <jake.wires@citrix.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* Copyright (c) 2008, XenSource Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of XenSource Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include "tapdisk-driver.h"
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#include "tapdisk-server.h"
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#include "tapdisk-disktype.h"
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td_driver_t *
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tapdisk_driver_allocate(int type, char *name, td_flag_t flags, int storage)
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{
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int err;
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td_driver_t *driver;
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const struct tap_disk *ops;
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ops = tapdisk_disk_drivers[type];
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if (!ops)
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return NULL;
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driver = calloc(1, sizeof(td_driver_t));
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if (!driver)
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return NULL;
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err = tapdisk_namedup(&driver->name, name);
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if (err)
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goto fail;
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driver->ops = ops;
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driver->type = type;
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driver->storage = storage;
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driver->data = calloc(1, ops->private_data_size);
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if (!driver->data)
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goto fail;
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if (td_flag_test(flags, TD_OPEN_RDONLY))
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td_flag_set(driver->state, TD_DRIVER_RDONLY);
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return driver;
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fail:
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free(driver->name);
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free(driver->data);
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free(driver);
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return NULL;
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}
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void
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tapdisk_driver_free(td_driver_t *driver)
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{
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if (!driver)
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return;
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if (driver->refcnt)
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return;
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if (td_flag_test(driver->state, TD_DRIVER_OPEN))
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EPRINTF("freeing open driver %s (state 0x%08x)\n",
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driver->name, driver->state);
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free(driver->name);
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free(driver->data);
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free(driver);
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}
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void
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tapdisk_driver_queue_tiocb(td_driver_t *driver, struct tiocb *tiocb)
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{
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tapdisk_server_queue_tiocb(tiocb);
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}
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void
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tapdisk_driver_debug(td_driver_t *driver)
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{
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if (driver->ops->td_debug)
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driver->ops->td_debug(driver);
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}
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