Archipelago » blktap-utils

/*

 * Copyright (c) 2007, 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.

 */

#define DEFAULT_LEASE_TIME_SECS 30

int lock(char *fn_to_lock, char *uuid, int force, int readonly, int *lease_time, int *retstat);

int unlock(char *fn_to_unlock, char *uuid, int readonly, int *retstat);

int lock_delta(char *fn_to_check, int *cur_lease_time, int *max_lease_time);

typedef enum {

    LOCK_OK          =  0,

    LOCK_EBADPARM    = -1,

    LOCK_ENOMEM      = -2,

    LOCK_ESTAT       = -3,

    LOCK_EHELD_WR    = -4,

    LOCK_EHELD_RD    = -5,

    LOCK_EOPEN       = -6,

    LOCK_EXLOCK_OPEN = -7,

    LOCK_EXLOCK_WRITE= -8,

    LOCK_EINODE      = -9,

    LOCK_EUPDATE     = -10,

    LOCK_EREAD       = -11,

    LOCK_EREMOVE     = -12,

    LOCK_ENOLOCK     = -13,

    LOCK_EUSAGE      = -14,

} lock_error;