1 /* 2 * Copyright (c) 2007, XenSource Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of XenSource Inc. nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 20 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #define DEFAULT_LEASE_TIME_SECS 30 30 31 int lock(char *fn_to_lock, char *uuid, int force, int readonly, int *lease_time, int *retstat); 32 int unlock(char *fn_to_unlock, char *uuid, int readonly, int *retstat); 33 int lock_delta(char *fn_to_check, int *cur_lease_time, int *max_lease_time); 34 35 typedef enum { 36 LOCK_OK = 0, 37 LOCK_EBADPARM = -1, 38 LOCK_ENOMEM = -2, 39 LOCK_ESTAT = -3, 40 LOCK_EHELD_WR = -4, 41 LOCK_EHELD_RD = -5, 42 LOCK_EOPEN = -6, 43 LOCK_EXLOCK_OPEN = -7, 44 LOCK_EXLOCK_WRITE= -8, 45 LOCK_EINODE = -9, 46 LOCK_EUPDATE = -10, 47 LOCK_EREAD = -11, 48 LOCK_EREMOVE = -12, 49 LOCK_ENOLOCK = -13, 50 LOCK_EUSAGE = -14, 51 } lock_error; 52