sys/miscfs/syncfs/syncfs.h

   1 /*      $NetBSD: syncfs.h,v 1.10 2006/10/20 18:58:12 reinoud Exp $      */
   2
   3 /*
   4  * Copyright 1997 Marshall Kirk McKusick. All Rights Reserved.
   5  *
   6  * This code is derived from work done by Greg Ganger at the
   7  * University of Michigan.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. None of the names of McKusick, Ganger, or the University of Michigan
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef _MISCFS_SYNCFS_SYNCFS_H_
  35 #define _MISCFS_SYNCFS_SYNCFS_H_
  36
  37 /*
  38  * Routines to create and manage a filesystem syncer vnode.
  39  */
  40 #define sync_close      genfs_nullop
  41 int     sync_fsync(void *);
  42 int     sync_inactive(void *);
  43 int     sync_reclaim(void *);
  44 #define sync_lock       genfs_nolock
  45 #define sync_unlock     genfs_nounlock
  46 int     sync_print(void *);
  47 #define sync_islocked   genfs_noislocked
  48 #define sync_putpages   genfs_null_putpages
  49
  50 void sched_sync(void *);
  51 void vn_initialize_syncerd(void);
  52 int vfs_allocate_syncvnode(struct mount *);
  53 void vfs_deallocate_syncvnode(struct mount *);
  54
  55 extern int (**sync_vnodeop_p)(void *);
  56
  57 #define SYNCER_MAXDELAY       32
  58
  59 extern int syncer_maxdelay;     /* maximum delay time */
  60 extern kmutex_t syncer_mutex;   /* lock to freeze syncer during unmount */
  61 TAILQ_HEAD(synclist, vnode);
  62
  63 #endif /* _MISCFS_SYNCFS_SYNCFS_H_ */