1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Scooter Morris at Genentech Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)lockf.h 8.1 (Berkeley) 6/11/93 33 * $FreeBSD: src/sys/sys/lockf.h,v 1.10 1999/08/28 00:51:51 peter Exp $ 34 * $DragonFly: src/sys/sys/lockf.h,v 1.9 2006/05/20 02:42:13 dillon Exp $ 35 */ 36 37 #ifndef _SYS_LOCKF_H_ 38 #define _SYS_LOCKF_H_ 39 40 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 41 #error "This file should not be included by userland programs." 42 #endif 43 44 #ifndef _SYS_TYPES_H_ 45 #include <sys/types.h> 46 #endif 47 #ifndef _SYS_QUEUE_H_ 48 #include <sys/queue.h> 49 #endif 50 51 struct vop_advlock_args; 52 53 /* 54 * The lockf structure is a kernel structure which contains the information 55 * associated with the byte range locks on an inode. The lockf structure is 56 * embedded in the inode structure. 57 */ 58 59 struct lockf_range { 60 short lf_type; /* Lock type: F_RDLCK, F_WRLCK */ 61 short lf_flags; /* Lock flags: F_NOEND */ 62 off_t lf_start; /* Byte # of the start of the lock */ 63 off_t lf_end; /* Byte # of the end of the lock, */ 64 struct proc *lf_owner; /* owning process, NULL for flock locks */ 65 TAILQ_ENTRY(lockf_range) lf_link; 66 }; 67 68 TAILQ_HEAD(lockf_range_list, lockf_range); 69 70 struct lockf { 71 struct lockf_range_list lf_range; 72 struct lockf_range_list lf_blocked; 73 int init_done; 74 }; 75 76 #ifdef _KERNEL 77 int lf_advlock(struct vop_advlock_args *, struct lockf *, u_quad_t); 78 void lf_count_adjust(struct proc *, int); 79 80 extern int maxposixlocksperuid; 81 #endif 82 83 #endif /* !_SYS_LOCKF_H_ */ 84