bsd/ufs/ufs/ufs_inode.c

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1991, 1993, 1995
  31  *      The Regents of the University of California.  All rights reserved.
  32  * (c) UNIX System Laboratories, Inc.
  33  * All or some portions of this file are derived from material licensed
  34  * to the University of California by American Telephone and Telegraph
  35  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  36  * the permission of UNIX System Laboratories, Inc.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95
  67  */
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/proc.h>
  72 #include <sys/vnode_internal.h>
  73 #include <sys/mount_internal.h>
  74 #include <sys/kernel.h>
  75 #include <sys/malloc.h>
  76 #include <sys/quota.h>
  77
  78 #include <ufs/ufs/quota.h>
  79 #include <ufs/ufs/inode.h>
  80 #include <ufs/ufs/ufsmount.h>
  81 #include <ufs/ufs/ufs_extern.h>
  82
  83 u_long  nextgennumber;          /* Next generation number to assign. */
  84 extern int prtactive;
  85
  86 /*
  87  * Last reference to an inode.  If necessary, write or delete it.
  88  */
  89 int
  90 ufs_inactive(ap)
  91         struct vnop_inactive_args /* {
  92                 struct vnode *a_vp;
  93                 vfs_context_t a_context;
  94         } */ *ap;
  95 {
  96         struct vnode *vp = ap->a_vp;
  97         struct inode *ip = VTOI(vp);
  98         struct proc *p = vfs_context_proc(ap->a_context);
  99         struct timeval tv;
 100         int mode, error = 0;
 101         extern int prtactive;
 102
 103         if (prtactive && vp->v_usecount != 0)
 104                 vprint("ffs_inactive: pushing active", vp);
 105
 106         /*
 107          * Ignore inodes related to stale file handles.
 108          */
 109         if (ip->i_mode == 0)
 110                 goto out;
 111         if (ip->i_nlink <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
 112 #if QUOTA
 113                 if (!getinoquota(ip))
 114                         (void)chkiq(ip, -1, NOCRED, 0);
 115 #endif
 116                 /*
 117                  * marking inode in transit so that one can get this
 118                  * inode from inodecache
 119                  */
 120                 SET(ip->i_flag, IN_TRANSIT);
 121                 error = ffs_truncate_internal(vp, (off_t)0, 0, NOCRED);
 122                 ip->i_rdev = 0;
 123                 mode = ip->i_mode;
 124                 ip->i_mode = 0;
 125                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
 126                 ffs_vfree(vp, ip->i_number, mode);
 127         }
 128         if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
 129                 microtime(&tv);
 130                 ffs_update(vp, &tv, &tv, 0);
 131         }
 132 out:
 133         /*
 134          * If we are done with the inode, reclaim it
 135          * so that it can be reused immediately.
 136          */
 137         if (ip->i_mode == 0)
 138                 vnode_recycle(vp);
 139         return (error);
 140 }
 141
 142 /*
 143  * Reclaim an inode so that it can be used for other purposes.
 144  */
 145 int
 146 ufs_reclaim(vp, p)
 147         struct vnode *vp;
 148         struct proc *p;
 149 {
 150         register struct inode *ip;
 151         int i;
 152         extern int prtactive;
 153
 154         if (prtactive && vp->v_usecount != 0)
 155                 vprint("ufs_reclaim: pushing active", vp);
 156
 157         vnode_removefsref(vp);
 158         /*
 159          * Remove the inode from its hash chain.
 160          */
 161         ip = VTOI(vp);
 162         ufs_ihashrem(ip);
 163
 164         if (ip->i_devvp) {
 165                 struct vnode *tvp = ip->i_devvp;
 166                 ip->i_devvp = NULL;
 167                 vnode_rele(tvp);
 168         }
 169 #if QUOTA
 170         for (i = 0; i < MAXQUOTAS; i++) {
 171                 if (ip->i_dquot[i] != NODQUOT) {
 172                         dqrele(ip->i_dquot[i]);
 173                         ip->i_dquot[i] = NODQUOT;
 174                 }
 175         }
 176 #endif
 177         CLR(ip->i_flag, (IN_ALLOC|IN_TRANSIT));
 178         if (ISSET(ip->i_flag, IN_WALLOC)|| ISSET(ip->i_flag, IN_WTRANSIT))
 179                 wakeup(ip);
 180
 181         return (0);
 182 }