1/*	$OpenBSD: ufs_inode.c,v 1.45 2024/02/03 18:51:58 beck 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/vnode.h>
43#include <sys/mount.h>
44#include <sys/malloc.h>
45#include <sys/namei.h>
46
47#include <ufs/ufs/quota.h>
48#include <ufs/ufs/inode.h>
49#include <ufs/ufs/ufsmount.h>
50#include <ufs/ufs/ufs_extern.h>
51#ifdef UFS_DIRHASH
52#include <ufs/ufs/dir.h>
53#include <ufs/ufs/dirhash.h>
54#endif
55
56/*
57 * Last reference to an inode.  If necessary, write or delete it.
58 */
59int
60ufs_inactive(void *v)
61{
62	struct vop_inactive_args *ap = v;
63	struct vnode *vp = ap->a_vp;
64	struct inode *ip = VTOI(vp);
65	mode_t mode;
66	int error = 0;
67#ifdef DIAGNOSTIC
68	extern int prtactive;
69
70	if (prtactive && vp->v_usecount != 0)
71		vprint("ufs_inactive: pushing active", vp);
72#endif
73
74	/*
75	 * Ignore inodes related to stale file handles.
76	 */
77	if (ip->i_din1 == NULL || DIP(ip, mode) == 0)
78		goto out;
79
80	if (DIP(ip, nlink) <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
81		if (getinoquota(ip) == 0)
82			(void)ufs_quota_free_inode(ip, NOCRED);
83
84		error = UFS_TRUNCATE(ip, (off_t)0, 0, NOCRED);
85
86		DIP_ASSIGN(ip, rdev, 0);
87		mode = DIP(ip, mode);
88		DIP_ASSIGN(ip, mode, 0);
89		ip->i_flag |= IN_CHANGE | IN_UPDATE;
90
91		UFS_INODE_FREE(ip, ip->i_number, mode);
92	}
93
94	if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
95		UFS_UPDATE(ip, 0);
96	}
97out:
98	VOP_UNLOCK(vp);
99
100	/*
101	 * If we are done with the inode, reclaim it
102	 * so that it can be reused immediately.
103	 */
104	if (ip->i_din1 == NULL || DIP(ip, mode) == 0)
105		vrecycle(vp, ap->a_p);
106
107	return (error);
108}
109
110/*
111 * Reclaim an inode so that it can be used for other purposes.
112 */
113int
114ufs_reclaim(struct vnode *vp)
115{
116	struct inode *ip;
117#ifdef DIAGNOSTIC
118	extern int prtactive;
119
120	if (prtactive && vp->v_usecount != 0)
121		vprint("ufs_reclaim: pushing active", vp);
122#endif
123
124	ip = VTOI(vp);
125
126	/*
127	 * Stop deferring timestamp writes
128	 */
129	if (ip->i_flag & IN_LAZYMOD) {
130		ip->i_flag |= IN_MODIFIED;
131		UFS_UPDATE(ip, 0);
132	}
133
134	/*
135	 * Remove the inode from its hash chain.
136	 */
137	ufs_ihashrem(ip);
138	/*
139	 * Purge old data structures associated with the inode.
140	 */
141	cache_purge(vp);
142
143	if (ip->i_devvp) {
144		vrele(ip->i_devvp);
145	}
146#ifdef UFS_DIRHASH
147	if (ip->i_dirhash != NULL)
148		ufsdirhash_free(ip);
149#endif
150	ufs_quota_delete(ip);
151	return (0);
152}
153