sys/ufs/lfs/ulfs_snapshot.c

   1 /*      $NetBSD: ulfs_snapshot.c,v 1.2 2013/06/08 22:05:15 dholland Exp $       */
   2 /*  from ffs_snapshot.c,v 1.122 2013/05/07 09:40:54 hannken Exp  */
   3
   4 /*
   5  * Copyright 2000 Marshall Kirk McKusick. All Rights Reserved.
   6  *
   7  * Further information about snapshots can be obtained from:
   8  *
   9  *      Marshall Kirk McKusick          http://www.mckusick.com/softdep/
  10  *      1614 Oxford Street              mckusick@mckusick.com
  11  *      Berkeley, CA 94709-1608         +1-510-843-9542
  12  *      USA
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  *
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in the
  22  *    documentation and/or other materials provided with the distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
  25  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  26  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27  * DISCLAIMED.  IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
  28  * 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  *      @(#)ffs_snapshot.c      8.11 (McKusick) 7/23/00
  37  *
  38  *      from FreeBSD: ffs_snapshot.c,v 1.79 2004/02/13 02:02:06 kuriyama Exp
  39  */
  40
  41 #include <sys/cdefs.h>
  42 __KERNEL_RCSID(0, "$NetBSD: ulfs_snapshot.c,v 1.2 2013/06/08 22:05:15 dholland Exp $");
  43
  44 #if defined(_KERNEL_OPT)
  45 #include "opt_lfs.h"
  46 #endif
  47
  48 #include <sys/param.h>
  49 #include <sys/kernel.h>
  50 #include <sys/systm.h>
  51 #include <sys/conf.h>
  52 #include <sys/buf.h>
  53 #include <sys/proc.h>
  54 #include <sys/namei.h>
  55 #include <sys/sched.h>
  56 #include <sys/stat.h>
  57 #include <sys/malloc.h>
  58 #include <sys/mount.h>
  59 #include <sys/resource.h>
  60 #include <sys/resourcevar.h>
  61 #include <sys/vnode.h>
  62 #include <sys/kauth.h>
  63 #include <sys/fstrans.h>
  64 #include <sys/wapbl.h>
  65
  66 #include <miscfs/specfs/specdev.h>
  67
  68 #include <ufs/lfs/ulfs_quotacommon.h>
  69 #include <ufs/lfs/ulfsmount.h>
  70 #include <ufs/lfs/ulfs_inode.h>
  71 #include <ufs/lfs/ulfs_extern.h>
  72 #include <ufs/lfs/ulfs_bswap.h>
  73
  74 #include <ufs/lfs/lfs.h>
  75 #include <ufs/lfs/lfs_extern.h>
  76
  77 #include <uvm/uvm.h>
  78
  79 /*
  80  * Decrement extra reference on snapshot when last name is removed.
  81  * It will not be freed until the last open reference goes away.
  82  */
  83 void
  84 ulfs_snapgone(struct inode *ip)
  85 {
  86         (void)ip;
  87         /* just panic */
  88         panic("reached ulfs_snapgone\n");
  89 }