1*43a90889SApple OSS Distributions /* 2*43a90889SApple OSS Distributions * Copyright (c) 2004-2018 Apple Inc. All rights reserved. 3*43a90889SApple OSS Distributions * 4*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*43a90889SApple OSS Distributions * 6*43a90889SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*43a90889SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*43a90889SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*43a90889SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*43a90889SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*43a90889SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*43a90889SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*43a90889SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*43a90889SApple OSS Distributions * 15*43a90889SApple OSS Distributions * Please obtain a copy of the License at 16*43a90889SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*43a90889SApple OSS Distributions * 18*43a90889SApple OSS Distributions * The Original Code and all software distributed under the License are 19*43a90889SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*43a90889SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*43a90889SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*43a90889SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*43a90889SApple OSS Distributions * Please see the License for the specific language governing rights and 24*43a90889SApple OSS Distributions * limitations under the License. 25*43a90889SApple OSS Distributions * 26*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*43a90889SApple OSS Distributions */ 28*43a90889SApple OSS Distributions /* 29*43a90889SApple OSS Distributions * Copyright (c) 1991, 1993 30*43a90889SApple OSS Distributions * The Regents of the University of California. All rights reserved. 31*43a90889SApple OSS Distributions * 32*43a90889SApple OSS Distributions * This code is derived from software contributed to Berkeley by 33*43a90889SApple OSS Distributions * Scooter Morris at Genentech Inc. 34*43a90889SApple OSS Distributions * 35*43a90889SApple OSS Distributions * Redistribution and use in source and binary forms, with or without 36*43a90889SApple OSS Distributions * modification, are permitted provided that the following conditions 37*43a90889SApple OSS Distributions * are met: 38*43a90889SApple OSS Distributions * 1. Redistributions of source code must retain the above copyright 39*43a90889SApple OSS Distributions * notice, this list of conditions and the following disclaimer. 40*43a90889SApple OSS Distributions * 2. Redistributions in binary form must reproduce the above copyright 41*43a90889SApple OSS Distributions * notice, this list of conditions and the following disclaimer in the 42*43a90889SApple OSS Distributions * documentation and/or other materials provided with the distribution. 43*43a90889SApple OSS Distributions * 4. Neither the name of the University nor the names of its contributors 44*43a90889SApple OSS Distributions * may be used to endorse or promote products derived from this software 45*43a90889SApple OSS Distributions * without specific prior written permission. 46*43a90889SApple OSS Distributions * 47*43a90889SApple OSS Distributions * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48*43a90889SApple OSS Distributions * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49*43a90889SApple OSS Distributions * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50*43a90889SApple OSS Distributions * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51*43a90889SApple OSS Distributions * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52*43a90889SApple OSS Distributions * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53*43a90889SApple OSS Distributions * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54*43a90889SApple OSS Distributions * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55*43a90889SApple OSS Distributions * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56*43a90889SApple OSS Distributions * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57*43a90889SApple OSS Distributions * SUCH DAMAGE. 58*43a90889SApple OSS Distributions * 59*43a90889SApple OSS Distributions * @(#)lockf.h 8.1 (Berkeley) 6/11/93 60*43a90889SApple OSS Distributions * $FreeBSD: src/sys/sys/lockf.h,v 1.16 2004/04/07 04:19:49 imp Exp $ 61*43a90889SApple OSS Distributions */ 62*43a90889SApple OSS Distributions 63*43a90889SApple OSS Distributions #ifndef _SYS_LOCKF_H_ 64*43a90889SApple OSS Distributions #define _SYS_LOCKF_H_ 65*43a90889SApple OSS Distributions 66*43a90889SApple OSS Distributions #include <sys/queue.h> 67*43a90889SApple OSS Distributions #include <sys/cdefs.h> 68*43a90889SApple OSS Distributions #include <sys/types.h> 69*43a90889SApple OSS Distributions 70*43a90889SApple OSS Distributions struct vnop_advlock_args; 71*43a90889SApple OSS Distributions struct vnode; 72*43a90889SApple OSS Distributions 73*43a90889SApple OSS Distributions #if IMPORTANCE_INHERITANCE 74*43a90889SApple OSS Distributions #define LF_NOT_BOOSTED 0 75*43a90889SApple OSS Distributions #define LF_BOOSTED 1 76*43a90889SApple OSS Distributions #endif /* IMPORTANCE_INHERITANCE */ 77*43a90889SApple OSS Distributions 78*43a90889SApple OSS Distributions /* 79*43a90889SApple OSS Distributions * The lockf structure is a kernel structure which contains the information 80*43a90889SApple OSS Distributions * associated with a byte range lock. The lockf structures are linked into 81*43a90889SApple OSS Distributions * the vnode structure. Locks are sorted by the starting byte of the lock for 82*43a90889SApple OSS Distributions * efficiency after they have been committed; uncommitted locks are on the list 83*43a90889SApple OSS Distributions * head so they may quickly be accessed, and are both short lived and transient. 84*43a90889SApple OSS Distributions */ 85*43a90889SApple OSS Distributions TAILQ_HEAD(locklist, lockf); 86*43a90889SApple OSS Distributions 87*43a90889SApple OSS Distributions struct lockf { 88*43a90889SApple OSS Distributions short lf_flags; /* Semantics: F_POSIX, F_FLOCK, F_WAIT */ 89*43a90889SApple OSS Distributions short lf_type; /* Lock type: F_RDLCK, F_WRLCK */ 90*43a90889SApple OSS Distributions #if IMPORTANCE_INHERITANCE 91*43a90889SApple OSS Distributions int lf_boosted; /* Is the owner of the lock boosted */ 92*43a90889SApple OSS Distributions #endif 93*43a90889SApple OSS Distributions off_t lf_start; /* Byte # of the start of the lock */ 94*43a90889SApple OSS Distributions off_t lf_end; /* Byte # of the end of the lock (-1=EOF) */ 95*43a90889SApple OSS Distributions caddr_t lf_id; /* Id of the resource holding the lock */ 96*43a90889SApple OSS Distributions struct lockf **lf_head; /* Back pointer to the head of the lockf list */ 97*43a90889SApple OSS Distributions struct vnode *lf_vnode; /* Back pointer to the inode */ 98*43a90889SApple OSS Distributions struct lockf *lf_next; /* Pointer to the next lock on this inode */ 99*43a90889SApple OSS Distributions struct locklist lf_blkhd; /* List of requests blocked on this lock */ 100*43a90889SApple OSS Distributions TAILQ_ENTRY(lockf) lf_block;/* A request waiting for a lock */ 101*43a90889SApple OSS Distributions struct proc *lf_owner; /* The proc that did the SETLK, if known */ 102*43a90889SApple OSS Distributions }; 103*43a90889SApple OSS Distributions 104*43a90889SApple OSS Distributions __BEGIN_DECLS 105*43a90889SApple OSS Distributions 106*43a90889SApple OSS Distributions #ifdef KERNEL_PRIVATE 107*43a90889SApple OSS Distributions void lf_init(void); 108*43a90889SApple OSS Distributions int lf_advlock(struct vnop_advlock_args *); 109*43a90889SApple OSS Distributions int lf_assert(struct vnop_advlock_args *, void **); 110*43a90889SApple OSS Distributions void lf_commit(void *, int); 111*43a90889SApple OSS Distributions void lf_abort_advlocks(vnode_t); 112*43a90889SApple OSS Distributions 113*43a90889SApple OSS Distributions #ifdef LOCKF_DEBUG 114*43a90889SApple OSS Distributions void lf_print(char *, struct lockf *); 115*43a90889SApple OSS Distributions void lf_printlist(char *, struct lockf *); 116*43a90889SApple OSS Distributions #endif 117*43a90889SApple OSS Distributions #endif /* KERNEL_PRIVATE */ 118*43a90889SApple OSS Distributions 119*43a90889SApple OSS Distributions __END_DECLS 120*43a90889SApple OSS Distributions 121*43a90889SApple OSS Distributions #endif /* !_SYS_LOCKF_H_ */ 122