sys/vfs/ufs/ufs_inode.c

   1 /*
   2  * Copyright (c) 1991, 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, 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. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95
  39  * $FreeBSD: src/sys/ufs/ufs/ufs_inode.c,v 1.25.2.3 2002/07/05 22:42:31 dillon Exp $
  40  * $DragonFly: src/sys/vfs/ufs/ufs_inode.c,v 1.24 2008/01/02 22:42:37 dillon Exp $
  41  */
  42
  43 #include "opt_quota.h"
  44 #include "opt_ufs.h"
  45
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/vnode.h>
  49 #include <sys/mount.h>
  50 #include <sys/malloc.h>
  51
  52 #include "quota.h"
  53 #include "inode.h"
  54 #include "ufsmount.h"
  55 #include "ufs_extern.h"
  56 #include "ffs_extern.h"
  57 #ifdef UFS_DIRHASH
  58 #include "dir.h"
  59 #include "dirhash.h"
  60 #endif
  61
  62 int     prtactive = 0;          /* 1 => print out reclaim of active vnodes */
  63
  64 /*
  65  * Last reference to an inode.  If necessary, write or delete it.
  66  *
  67  * ufs_inactive(struct vnode *a_vp)
  68  */
  69 int
  70 ufs_inactive(struct vop_inactive_args *ap)
  71 {
  72         struct vnode *vp = ap->a_vp;
  73         struct inode *ip = VTOI(vp);
  74         int mode, error = 0;
  75
  76         if (prtactive && vp->v_sysref.refcnt > 1)
  77                 vprint("ufs_inactive: pushing active", vp);
  78
  79         /*
  80          * Ignore inodes related to stale file handles.
  81          */
  82         if (ip == NULL || ip->i_mode == 0)
  83                 goto out;
  84         if (ip->i_nlink <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
  85 #ifdef QUOTA
  86                 if (!ufs_getinoquota(ip))
  87                         (void)ufs_chkiq(ip, -1, NOCRED, FORCE);
  88 #endif
  89                 /* Must have a VM object to truncate */
  90                 error = ffs_truncate(vp, (off_t)0, 0, NOCRED);
  91                 ip->i_rdev = 0;
  92                 mode = ip->i_mode;
  93                 ip->i_mode = 0;
  94                 ip->i_flag |= IN_CHANGE | IN_UPDATE;
  95                 ffs_vfree(vp, ip->i_number, mode);
  96         }
  97         if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE))
  98                 ffs_update(vp, 0);
  99 out:
 100         /*
 101          * If we are done with the inode, reclaim it
 102          * so that it can be reused immediately.
 103          */
 104         if (ip == NULL || ip->i_mode == 0)
 105                 vrecycle(vp);
 106         return (error);
 107 }
 108
 109 /*
 110  * Reclaim an inode so that it can be used for other purposes.
 111  *
 112  * ufs_reclaim(struct vnode *a_vp)
 113  */
 114 int
 115 ufs_reclaim(struct vop_reclaim_args *ap)
 116 {
 117         struct inode *ip;
 118         struct vnode *vp = ap->a_vp;
 119 #ifdef QUOTA
 120         int i;
 121 #endif
 122
 123         if (prtactive && vp->v_sysref.refcnt > 1)
 124                 vprint("ufs_reclaim: pushing active", vp);
 125         ip = VTOI(vp);
 126
 127         /*
 128          * Lazy updates.
 129          */
 130         if (ip) {
 131                 if (vp->v_flag & VFSMID) {
 132                         vp->v_flag &= ~VFSMID;
 133                         ++ip->i_fsmid;
 134                         ip->i_flag |= IN_LAZYMOD;
 135                 }
 136                 if (ip->i_flag & IN_LAZYMOD) {
 137                         ip->i_flag |= IN_MODIFIED;
 138                         ffs_update(vp, 0);
 139                 }
 140         }
 141 #ifdef INVARIANTS
 142         if (ip && (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE))) {
 143                 kprintf("WARNING: INODE %ld flags %08x: modified inode being released!\n", (long)ip->i_number, (int)ip->i_flag);
 144                 ip->i_flag |= IN_MODIFIED;
 145                 ffs_update(vp, 0);
 146         }
 147 #endif
 148         /*
 149          * Remove the inode from its hash chain and purge namecache
 150          * data associated with the vnode.
 151          */
 152         vp->v_data = NULL;
 153         if (ip) {
 154                 ufs_ihashrem(ip);
 155                 if (ip->i_devvp) {
 156                         vrele(ip->i_devvp);
 157                         ip->i_devvp = 0;
 158                 }
 159 #ifdef QUOTA
 160                 for (i = 0; i < MAXQUOTAS; i++) {
 161                         if (ip->i_dquot[i] != NODQUOT) {
 162                                 ufs_dqrele(vp, ip->i_dquot[i]);
 163                                 ip->i_dquot[i] = NODQUOT;
 164                         }
 165                 }
 166 #endif
 167 #ifdef UFS_DIRHASH
 168                 if (ip->i_dirhash != NULL)
 169                         ufsdirhash_free(ip);
 170 #endif
 171                 kfree(ip, VFSTOUFS(vp->v_mount)->um_malloctype);
 172         }
 173         return (0);
 174 }