usr.sbin/rpc.lockd/handles.c

   1 /*
   2  * Copyright (c) 1995
   3  *      A.R. Gordon (andrew.gordon@net-tel.co.uk).  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
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed for the FreeBSD project
  16  * 4. Neither the name of the author nor the names of any co-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 ANDREW GORDON 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 AUTHOR 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  * $FreeBSD: src/usr.sbin/rpc.lockd/handles.c,v 1.4 1999/08/28 01:19:35 peter Exp $
  33  * $DragonFly: src/usr.sbin/rpc.lockd/handles.c,v 1.2 2003/06/17 04:30:02 dillon Exp $
  34  */
  35
  36 #include "nlm_prot.h"
  37
  38 /* ------------------------------------------------------------------------- */
  39 /*
  40
  41
  42 * need to find all fds in use by a host and free them when host crashes
  43   (need not be efficient)
  44
  45 * need to find fd corresponding to <inode, device>
  46
  47 */
  48
  49 typedef struct fdinfo
  50 {
  51   int fd;       /* The file descriptor itself                   */
  52   int ref_count;        /* Count of hosts using the fd - fd is  */
  53                         /* closed when this reaches zero        */
  54   ino_t inode_no;       /* The inode number of this file.       */
  55   dev_t device;         /* device on which the file lives.      */
  56   struct fdinfo *next;  /* Chain of FdInfo structures           */
  57   struct fdinfo *prev;
  58 } FdInfo;