The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/lockf.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: lockf.h,v 1.14 2003/08/07 16:34:07 agc Exp $   */
    2 
    3 /*
    4  * Copyright (c) 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * Scooter Morris at Genentech Inc.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)lockf.h     8.2 (Berkeley) 10/26/94
   35  */
   36 
   37 #ifndef _SYS_LOCKF_H_
   38 #define _SYS_LOCKF_H_
   39 
   40 /*
   41  * The lockf structure is a kernel structure which contains the information
   42  * associated with a byte range lock.  The lockf structures are linked into
   43  * the inode structure. Locks are sorted by the starting byte of the lock for
   44  * efficiency.
   45  *
   46  * lf_next is used for two purposes, depending on whether the lock is
   47  * being held, or is in conflict with an existing lock.  If this lock
   48  * is held, it indicates the next lock on the same vnode.
   49  * For pending locks, if lock->lf_next is non-NULL, then lock->lf_block
   50  * must be queued on the lf_blkhd TAILQ of lock->lf_next.
   51  */
   52 
   53 TAILQ_HEAD(locklist, lockf);
   54 
   55 struct lockf {
   56         short   lf_flags;        /* Lock semantics: F_POSIX, F_FLOCK, F_WAIT */
   57         short   lf_type;         /* Lock type: F_RDLCK, F_WRLCK */
   58         off_t   lf_start;        /* The byte # of the start of the lock */
   59         off_t   lf_end;          /* The byte # of the end of the lock (-1=EOF)*/
   60         void    *lf_id;          /* process or file description holding lock */
   61         struct  lwp *lf_lwp;     /* LWP waiting for lock */
   62         struct  lockf **lf_head; /* Back pointer to the head of lockf list */
   63         struct  lockf *lf_next;  /* Next lock on this vnode, or blocking lock */
   64         struct  locklist lf_blkhd; /* List of requests blocked on this lock */
   65         TAILQ_ENTRY(lockf) lf_block;/* A request waiting for a lock */
   66 };
   67 
   68 /* Maximum length of sleep chains to traverse to try and detect deadlock. */
   69 #define MAXDEPTH 50
   70 
   71 #ifdef _KERNEL
   72 
   73 int lf_advlock(struct vop_advlock_args *, struct lockf **, off_t);
   74 
   75 #endif /* _KERNEL */
   76 
   77 #endif /* !_SYS_LOCKF_H_ */

Cache object: bc4b77996af8005d0f9bd97f5ef7cca4


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.