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: releng/10.1/sys/ufs/ufs/ufs_inode.c 234612 2012-04-23 17:54:49Z trasz $");
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 mode_t mode;
77 int error = 0;
78 off_t isize;
79 struct mount *mp;
80
81 mp = NULL;
82 /*
83 * Ignore inodes related to stale file handles.
84 */
85 if (ip->i_mode == 0)
86 goto out;
87 #ifdef UFS_GJOURNAL
88 ufs_gjournal_close(vp);
89 #endif
90 #ifdef QUOTA
91 /*
92 * Before moving off the active list, we must be sure that
93 * any modified quotas have been pushed since these will no
94 * longer be checked once the vnode is on the inactive list.
95 */
96 qsyncvp(vp);
97 #endif
98 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) ||
99 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) {
100 loop:
101 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) {
102 /* Cannot delete file while file system is suspended */
103 if ((vp->v_iflag & VI_DOOMED) != 0) {
104 /* Cannot return before file is deleted */
105 (void) vn_start_secondary_write(vp, &mp,
106 V_WAIT);
107 } else {
108 MNT_ILOCK(mp);
109 if ((mp->mnt_kern_flag &
110 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) {
111 MNT_IUNLOCK(mp);
112 goto loop;
113 }
114 /*
115 * Fail to inactivate vnode now and
116 * let ffs_snapshot() clean up after
117 * it has resumed the file system.
118 */
119 VI_LOCK(vp);
120 vp->v_iflag |= VI_OWEINACT;
121 VI_UNLOCK(vp);
122 MNT_IUNLOCK(mp);
123 return (0);
124 }
125 }
126 }
127 isize = ip->i_size;
128 if (ip->i_ump->um_fstype == UFS2)
129 isize += ip->i_din2->di_extsize;
130 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip))
131 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, NOCRED);
132 if (ip->i_nlink <= 0 && ip->i_mode && !UFS_RDONLY(ip)) {
133 #ifdef QUOTA
134 if (!getinoquota(ip))
135 (void)chkiq(ip, -1, NOCRED, FORCE);
136 #endif
137 #ifdef UFS_EXTATTR
138 ufs_extattr_vnode_inactive(vp, ap->a_td);
139 #endif
140 /*
141 * Setting the mode to zero needs to wait for the inode
142 * to be written just as does a change to the link count.
143 * So, rather than creating a new entry point to do the
144 * same thing, we just use softdep_change_linkcnt().
145 */
146 DIP_SET(ip, i_rdev, 0);
147 mode = ip->i_mode;
148 ip->i_mode = 0;
149 DIP_SET(ip, i_mode, 0);
150 ip->i_flag |= IN_CHANGE | IN_UPDATE;
151 if (DOINGSOFTDEP(vp))
152 softdep_change_linkcnt(ip);
153 UFS_VFREE(vp, ip->i_number, mode);
154 }
155 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) {
156 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 &&
157 mp == NULL &&
158 vn_start_secondary_write(vp, &mp, V_NOWAIT)) {
159 mp = NULL;
160 ip->i_flag &= ~IN_ACCESS;
161 } else {
162 if (mp == NULL)
163 (void) vn_start_secondary_write(vp, &mp,
164 V_WAIT);
165 UFS_UPDATE(vp, 0);
166 }
167 }
168 out:
169 /*
170 * If we are done with the inode, reclaim it
171 * so that it can be reused immediately.
172 */
173 if (ip->i_mode == 0)
174 vrecycle(vp);
175 if (mp != NULL)
176 vn_finished_secondary_write(mp);
177 return (error);
178 }
179
180 void
181 ufs_prepare_reclaim(struct vnode *vp)
182 {
183 struct inode *ip;
184 #ifdef QUOTA
185 int i;
186 #endif
187
188 ip = VTOI(vp);
189
190 vnode_destroy_vobject(vp);
191 #ifdef QUOTA
192 for (i = 0; i < MAXQUOTAS; i++) {
193 if (ip->i_dquot[i] != NODQUOT) {
194 dqrele(vp, ip->i_dquot[i]);
195 ip->i_dquot[i] = NODQUOT;
196 }
197 }
198 #endif
199 #ifdef UFS_DIRHASH
200 if (ip->i_dirhash != NULL)
201 ufsdirhash_free(ip);
202 #endif
203 }
204
205 /*
206 * Reclaim an inode so that it can be used for other purposes.
207 */
208 int
209 ufs_reclaim(ap)
210 struct vop_reclaim_args /* {
211 struct vnode *a_vp;
212 struct thread *a_td;
213 } */ *ap;
214 {
215 struct vnode *vp = ap->a_vp;
216 struct inode *ip = VTOI(vp);
217 struct ufsmount *ump = ip->i_ump;
218
219 ufs_prepare_reclaim(vp);
220
221 if (ip->i_flag & IN_LAZYMOD)
222 ip->i_flag |= IN_MODIFIED;
223 UFS_UPDATE(vp, 0);
224 /*
225 * Remove the inode from its hash chain.
226 */
227 vfs_hash_remove(vp);
228
229 /*
230 * Lock the clearing of v_data so ffs_lock() can inspect it
231 * prior to obtaining the lock.
232 */
233 VI_LOCK(vp);
234 vp->v_data = 0;
235 VI_UNLOCK(vp);
236 UFS_IFREE(ump, ip);
237 return (0);
238 }
Cache object: e5f1e803646bc6abe68feffc2d08bb99
|