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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include "opt_quota.h"
41 #include "opt_ufs.h"
42
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/vnode.h>
46 #include <sys/lock.h>
47 #include <sys/mount.h>
48 #include <sys/malloc.h>
49 #include <sys/mutex.h>
50
51 #include <ufs/ufs/extattr.h>
52 #include <ufs/ufs/quota.h>
53 #include <ufs/ufs/inode.h>
54 #include <ufs/ufs/ufsmount.h>
55 #include <ufs/ufs/ufs_extern.h>
56 #ifdef UFS_DIRHASH
57 #include <ufs/ufs/dir.h>
58 #include <ufs/ufs/dirhash.h>
59 #endif
60 #ifdef UFS_GJOURNAL
61 #include <ufs/ufs/gjournal.h>
62 #endif
63
64 /*
65 * Last reference to an inode. If necessary, write or delete it.
66 */
67 int
68 ufs_inactive(ap)
69 struct vop_inactive_args /* {
70 struct vnode *a_vp;
71 struct thread *a_td;
72 } */ *ap;
73 {
74 struct vnode *vp = ap->a_vp;
75 struct inode *ip = VTOI(vp);
76 struct thread *td = ap->a_td;
77 mode_t mode;
78 int error = 0;
79 off_t isize;
80 struct mount *mp;
81
82 mp = NULL;
83 /*
84 * Ignore inodes related to stale file handles.
85 */
86 if (ip->i_mode == 0)
87 goto out;
88 #ifdef UFS_GJOURNAL
89 ufs_gjournal_close(vp);
90 #endif
91 #ifdef QUOTA
92 /*
93 * Before moving off the active list, we must be sure that
94 * any modified quotas have been pushed since these will no
95 * longer be checked once the vnode is on the inactive list.
96 */
97 qsyncvp(vp);
98 #endif
99 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) ||
100 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) {
101 loop:
102 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) {
103 /* Cannot delete file while file system is suspended */
104 if ((vp->v_iflag & VI_DOOMED) != 0) {
105 /* Cannot return before file is deleted */
106 (void) vn_start_secondary_write(vp, &mp,
107 V_WAIT);
108 } else {
109 MNT_ILOCK(mp);
110 if ((mp->mnt_kern_flag &
111 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) {
112 MNT_IUNLOCK(mp);
113 goto loop;
114 }
115 /*
116 * Fail to inactivate vnode now and
117 * let ffs_snapshot() clean up after
118 * it has resumed the file system.
119 */
120 VI_LOCK(vp);
121 vp->v_iflag |= VI_OWEINACT;
122 VI_UNLOCK(vp);
123 MNT_IUNLOCK(mp);
124 return (0);
125 }
126 }
127 }
128 isize = ip->i_size;
129 if (ip->i_ump->um_fstype == UFS2)
130 isize += ip->i_din2->di_extsize;
131 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip))
132 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL,
133 NOCRED, td);
134 if (ip->i_nlink <= 0 && ip->i_mode && !UFS_RDONLY(ip)) {
135 #ifdef QUOTA
136 if (!getinoquota(ip))
137 (void)chkiq(ip, -1, NOCRED, FORCE);
138 #endif
139 #ifdef UFS_EXTATTR
140 ufs_extattr_vnode_inactive(vp, td);
141 #endif
142 /*
143 * Setting the mode to zero needs to wait for the inode
144 * to be written just as does a change to the link count.
145 * So, rather than creating a new entry point to do the
146 * same thing, we just use softdep_change_linkcnt().
147 */
148 DIP_SET(ip, i_rdev, 0);
149 mode = ip->i_mode;
150 ip->i_mode = 0;
151 DIP_SET(ip, i_mode, 0);
152 ip->i_flag |= IN_CHANGE | IN_UPDATE;
153 if (DOINGSOFTDEP(vp))
154 softdep_change_linkcnt(ip);
155 UFS_VFREE(vp, ip->i_number, mode);
156 }
157 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
158 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
159 mp == NULL &&
160 vn_start_secondary_write(vp, &mp, V_NOWAIT)) {
161 mp = NULL;
162 ip->i_flag &= ~IN_ACCESS;
163 } else {
164 if (mp == NULL)
165 (void) vn_start_secondary_write(vp, &mp,
166 V_WAIT);
167 UFS_UPDATE(vp, 0);
168 }
169 }
170 out:
171 /*
172 * If we are done with the inode, reclaim it
173 * so that it can be reused immediately.
174 */
175 if (ip->i_mode == 0)
176 vrecycle(vp, td);
177 if (mp != NULL)
178 vn_finished_secondary_write(mp);
179 return (error);
180 }
181
182 void
183 ufs_prepare_reclaim(struct vnode *vp)
184 {
185 struct inode *ip;
186 #ifdef QUOTA
187 int i;
188 #endif
189
190 ip = VTOI(vp);
191
192 vnode_destroy_vobject(vp);
193 #ifdef QUOTA
194 for (i = 0; i < MAXQUOTAS; i++) {
195 if (ip->i_dquot[i] != NODQUOT) {
196 dqrele(vp, ip->i_dquot[i]);
197 ip->i_dquot[i] = NODQUOT;
198 }
199 }
200 #endif
201 #ifdef UFS_DIRHASH
202 if (ip->i_dirhash != NULL)
203 ufsdirhash_free(ip);
204 #endif
205 }
206
207 /*
208 * Reclaim an inode so that it can be used for other purposes.
209 */
210 int
211 ufs_reclaim(ap)
212 struct vop_reclaim_args /* {
213 struct vnode *a_vp;
214 struct thread *a_td;
215 } */ *ap;
216 {
217 struct vnode *vp = ap->a_vp;
218 struct inode *ip = VTOI(vp);
219 struct ufsmount *ump = ip->i_ump;
220
221 ufs_prepare_reclaim(vp);
222
223 if (ip->i_flag & IN_LAZYMOD)
224 ip->i_flag |= IN_MODIFIED;
225 UFS_UPDATE(vp, 0);
226 /*
227 * Remove the inode from its hash chain.
228 */
229 vfs_hash_remove(vp);
230
231 /*
232 * Lock the clearing of v_data so ffs_lock() can inspect it
233 * prior to obtaining the lock.
234 */
235 VI_LOCK(vp);
236 vp->v_data = 0;
237 VI_UNLOCK(vp);
238 UFS_IFREE(ump, ip);
239 return (0);
240 }
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