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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)lockf.h 8.1 (Berkeley) 6/11/93 37 * $FreeBSD: src/sys/sys/lockf.h,v 1.10 1999/08/28 00:51:51 peter Exp $ 38 * $DragonFly: src/sys/sys/lockf.h,v 1.6 2004/05/07 10:09:25 joerg Exp $ 39 */ 40 41 #ifndef _SYS_LOCKF_H_ 42 #define _SYS_LOCKF_H_ 43 44 #include <sys/queue.h> 45 46 struct vop_advlock_args; 47 48 /* 49 * The lockf structure is a kernel structure which contains the information 50 * associated with the byte range locks on an inode. The lockf structure is 51 * embedded in the inode structure. 52 */ 53 54 struct lockf_range { 55 short lf_type; /* Lock type: F_RDLCK, F_WRLCK */ 56 short lf_flags; /* Lock flags: F_NOEND */ 57 off_t lf_start; /* Byte # of the start of the lock */ 58 off_t lf_end; /* Byte # of the end of the lock, */ 59 struct proc *lf_owner; /* owning process, NULL for flock locks */ 60 TAILQ_ENTRY(lockf_range) lf_link; 61 }; 62 63 struct lockf { 64 TAILQ_HEAD(, lockf_range) lf_range; 65 TAILQ_HEAD(, lockf_range) lf_blocked; 66 int init_done; 67 }; 68 69 int lf_advlock(struct vop_advlock_args *, struct lockf *, u_quad_t); 70 71 #ifdef _KERNEL 72 extern int maxposixlocksperuid; 73 #endif 74 75 void lf_count_adjust(struct proc *, int); 76 77 #endif /* !_SYS_LOCKF_H_ */ 78