1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1991, 1993, 1995
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 #include "opt_quota.h"
39 #include "opt_ufs.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/vnode.h>
44 #include <sys/lock.h>
45 #include <sys/mount.h>
46 #include <sys/malloc.h>
47 #include <sys/mutex.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 #ifdef UFS_GJOURNAL
59 #include <ufs/ufs/gjournal.h>
60 #endif
61
62 int
ufs_need_inactive(struct vop_need_inactive_args * ap)63 ufs_need_inactive(struct vop_need_inactive_args *ap)
64 {
65 struct vnode *vp;
66 struct inode *ip;
67 #ifdef QUOTA
68 int i;
69 #endif
70
71 vp = ap->a_vp;
72 ip = VTOI(vp);
73 if (UFS_RDONLY(ip))
74 return (0);
75 if (vn_need_pageq_flush(vp))
76 return (1);
77 if (ip->i_mode == 0 || ip->i_nlink <= 0 ||
78 (ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) ||
79 (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED |
80 IN_UPDATE)) != 0 ||
81 (ip->i_effnlink <= 0 && (ip->i_size != 0 || (I_IS_UFS2(ip) &&
82 ip->i_din2->di_extsize != 0))))
83 return (1);
84 #ifdef QUOTA
85 for (i = 0; i < MAXQUOTAS; i++) {
86 if (ip->i_dquot[i] != NULL)
87 return (1);
88 }
89 #endif
90 /*
91 * No need to check ufs_gjournal_close() condition since we
92 * return 1 if only i_nlink <= 0.
93 */
94 return (0);
95 }
96
97 /*
98 * Last reference to an inode. If necessary, write or delete it.
99 */
100 int
ufs_inactive(struct vop_inactive_args * ap)101 ufs_inactive(
102 struct vop_inactive_args /* {
103 struct vnode *a_vp;
104 } */ *ap)
105 {
106 struct vnode *vp = ap->a_vp;
107 struct inode *ip = VTOI(vp);
108 mode_t mode;
109 int error = 0;
110 off_t isize;
111 struct mount *mp;
112
113 mp = NULL;
114 /*
115 * Ignore inodes related to stale file handles.
116 */
117 if (ip->i_mode == 0)
118 goto out;
119 #ifdef UFS_GJOURNAL
120 ufs_gjournal_close(vp);
121 #endif
122 #ifdef QUOTA
123 /*
124 * Before moving off the active list, we must be sure that
125 * any modified quotas have been pushed since these will no
126 * longer be checked once the vnode is on the inactive list.
127 */
128 qsyncvp(vp);
129 #endif
130 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) ||
131 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) {
132 loop:
133 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) {
134 /* Cannot delete file while file system is suspended */
135 if (VN_IS_DOOMED(vp)) {
136 /* Cannot return before file is deleted */
137 (void) vn_start_secondary_write(vp, &mp,
138 V_WAIT);
139 } else {
140 MNT_ILOCK(mp);
141 if ((mp->mnt_kern_flag &
142 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) {
143 MNT_IUNLOCK(mp);
144 goto loop;
145 }
146 /*
147 * Fail to inactivate vnode now and
148 * let ffs_snapshot() clean up after
149 * it has resumed the file system.
150 */
151 VI_LOCK(vp);
152 vp->v_iflag |= VI_OWEINACT;
153 VI_UNLOCK(vp);
154 MNT_IUNLOCK(mp);
155 return (0);
156 }
157 }
158 }
159 isize = ip->i_size;
160 if (I_IS_UFS2(ip))
161 isize += ip->i_din2->di_extsize;
162 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip))
163 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, NOCRED);
164 if (ip->i_nlink <= 0 && ip->i_mode != 0 && !UFS_RDONLY(ip) &&
165 (vp->v_iflag & VI_OWEINACT) == 0) {
166 #ifdef QUOTA
167 if (!getinoquota(ip))
168 (void)chkiq(ip, -1, NOCRED, FORCE);
169 #endif
170 #ifdef UFS_EXTATTR
171 ufs_extattr_vnode_inactive(vp);
172 #endif
173 /*
174 * Setting the mode to zero needs to wait for the inode
175 * to be written just as does a change to the link count.
176 * So, rather than creating a new entry point to do the
177 * same thing, we just use softdep_change_linkcnt().
178 */
179 DIP_SET(ip, i_rdev, 0);
180 mode = ip->i_mode;
181 ip->i_mode = 0;
182 DIP_SET(ip, i_mode, 0);
183 UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
184 if (DOINGSOFTDEP(vp))
185 softdep_change_linkcnt(ip);
186 UFS_VFREE(vp, ip->i_number, mode);
187 }
188 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
189 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
190 mp == NULL &&
191 vn_start_secondary_write(vp, &mp, V_NOWAIT)) {
192 mp = NULL;
193 ip->i_flag &= ~IN_ACCESS;
194 } else {
195 if (mp == NULL)
196 (void) vn_start_secondary_write(vp, &mp,
197 V_WAIT);
198 UFS_UPDATE(vp, 0);
199 }
200 }
201 out:
202 /*
203 * If we are done with the inode, reclaim it
204 * so that it can be reused immediately.
205 */
206 if (ip->i_mode == 0 && (vp->v_iflag & VI_OWEINACT) == 0)
207 vrecycle(vp);
208 if (mp != NULL)
209 vn_finished_secondary_write(mp);
210 return (error);
211 }
212
213 /*
214 * Reclaim an inode so that it can be used for other purposes.
215 */
216 int
ufs_reclaim(struct vop_reclaim_args * ap)217 ufs_reclaim(
218 struct vop_reclaim_args /* {
219 struct vnode *a_vp;
220 } */ *ap)
221 {
222 struct vnode *vp = ap->a_vp;
223 struct inode *ip = VTOI(vp);
224 #ifdef QUOTA
225 int i;
226
227 for (i = 0; i < MAXQUOTAS; i++) {
228 if (ip->i_dquot[i] != NODQUOT) {
229 dqrele(vp, ip->i_dquot[i]);
230 ip->i_dquot[i] = NODQUOT;
231 }
232 }
233 #endif
234 #ifdef UFS_DIRHASH
235 if (ip->i_dirhash != NULL)
236 ufsdirhash_free(ip);
237 #endif
238
239 if (ip->i_flag & IN_LAZYMOD)
240 UFS_INODE_SET_FLAG(ip, IN_MODIFIED);
241 UFS_UPDATE(vp, 0);
242 /*
243 * Remove the inode from its hash chain.
244 */
245 vfs_hash_remove(vp);
246
247 /*
248 * Lock the clearing of v_data so ffs_lock() can inspect it
249 * prior to obtaining the lock.
250 */
251 VI_LOCK(vp);
252 vp->v_data = 0;
253 VI_UNLOCK(vp);
254 UFS_IFREE(ITOUMP(ip), ip);
255 return (0);
256 }
257