1 /* $OpenBSD: ufs_inode.c,v 1.29 2005/06/10 17:37:41 pedro Exp $ */
2 /* $NetBSD: ufs_inode.c,v 1.7 1996/05/11 18:27:52 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)ufs_inode.c 8.7 (Berkeley) 7/22/94
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/proc.h>
43 #include <sys/vnode.h>
44 #include <sys/mount.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/namei.h>
48
49 #include <ufs/ufs/extattr.h>
50 #include <ufs/ufs/quota.h>
51 #include <ufs/ufs/inode.h>
52 #include <ufs/ufs/ufsmount.h>
53 #include <ufs/ufs/ufs_extern.h>
54 #ifdef UFS_DIRHASH
55 #include <ufs/ufs/dir.h>
56 #include <ufs/ufs/dirhash.h>
57 #endif
58
59 u_long nextgennumber; /* Next generation number to assign. */
60
61 /*
62 * Last reference to an inode. If necessary, write or delete it.
63 */
64 int
ufs_inactive(v)65 ufs_inactive(v)
66 void *v;
67 {
68 struct vop_inactive_args /* {
69 struct vnode *a_vp;
70 struct proc *a_p;
71 } */ *ap = v;
72 struct vnode *vp = ap->a_vp;
73 struct inode *ip = VTOI(vp);
74 struct proc *p = ap->a_p;
75 mode_t mode;
76 int error = 0;
77 extern int prtactive;
78
79 if (prtactive && vp->v_usecount != 0)
80 vprint("ffs_inactive: pushing active", vp);
81
82 /*
83 * Ignore inodes related to stale file handles.
84 */
85 if (ip->i_ffs_mode == 0)
86 goto out;
87
88 if (ip->i_ffs_nlink <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
89 if (getinoquota(ip) == 0)
90 (void)ufs_quota_free_inode(ip, NOCRED);
91
92 error = UFS_TRUNCATE(ip, (off_t)0, 0, NOCRED);
93
94 ip->i_ffs_rdev = 0;
95 mode = ip->i_ffs_mode;
96 ip->i_ffs_mode = 0;
97 ip->i_flag |= IN_CHANGE | IN_UPDATE;
98
99 /*
100 * Setting the mode to zero needs to wait for the inode to be
101 * written just as does a change to the link count. So, rather
102 * than creating a new entry point to do the same thing, we
103 * just use softdep_change_linkcnt(). Also, we can't let
104 * softdep co-opt us to help on its worklist, as we may end up
105 * trying to recycle vnodes and getting to this same point a
106 * couple of times, blowing the kernel stack. However, this
107 * could be optimized by checking if we are coming from
108 * vrele(), vput() or vclean() (by checking for VXLOCK) and
109 * just avoiding the co-opt to happen in the last case.
110 */
111 if (DOINGSOFTDEP(vp))
112 softdep_change_linkcnt(ip, 1);
113
114 UFS_INODE_FREE(ip, ip->i_number, mode);
115 }
116
117 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
118 UFS_UPDATE(ip, 0);
119 }
120 out:
121 VOP_UNLOCK(vp, 0, p);
122
123 /*
124 * If we are done with the inode, reclaim it
125 * so that it can be reused immediately.
126 */
127 if (ip->i_ffs_mode == 0)
128 vrecycle(vp, NULL, p);
129
130 return (error);
131 }
132
133 /*
134 * Reclaim an inode so that it can be used for other purposes.
135 */
136 int
ufs_reclaim(vp,p)137 ufs_reclaim(vp, p)
138 register struct vnode *vp;
139 struct proc *p;
140 {
141 register struct inode *ip;
142 extern int prtactive;
143
144 if (prtactive && vp->v_usecount != 0)
145 vprint("ufs_reclaim: pushing active", vp);
146 /*
147 * Remove the inode from its hash chain.
148 */
149 ip = VTOI(vp);
150 ufs_ihashrem(ip);
151 /*
152 * Purge old data structures associated with the inode.
153 */
154 cache_purge(vp);
155
156 if (ip->i_devvp) {
157 vrele(ip->i_devvp);
158 }
159 #ifdef UFS_DIRHASH
160 if (ip->i_dirhash != NULL)
161 ufsdirhash_free(ip);
162 #endif
163 ufs_quota_delete(ip);
164 return (0);
165 }
166