1 /*
2 * Copyright (c) 1991, 1993, 1994
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)ufs_vfsops.c 8.8 (Berkeley) 5/20/95
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD: releng/5.2/sys/ufs/ufs/ufs_vfsops.c 116384 2003-06-15 06:36:19Z rwatson $");
43
44 #include "opt_quota.h"
45 #include "opt_ufs.h"
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/lock.h>
51 #include <sys/malloc.h>
52 #include <sys/mount.h>
53 #include <sys/proc.h>
54 #include <sys/socket.h>
55 #include <sys/vnode.h>
56
57 #include <ufs/ufs/extattr.h>
58 #include <ufs/ufs/quota.h>
59 #include <ufs/ufs/inode.h>
60 #include <ufs/ufs/ufsmount.h>
61 #include <ufs/ufs/ufs_extern.h>
62 #ifdef UFS_DIRHASH
63 #include <ufs/ufs/dir.h>
64 #include <ufs/ufs/dirhash.h>
65 #endif
66
67 MALLOC_DEFINE(M_UFSMNT, "UFS mount", "UFS mount structure");
68 /*
69 * Make a filesystem operational.
70 * Nothing to do at the moment.
71 */
72 /* ARGSUSED */
73 int
74 ufs_start(mp, flags, td)
75 struct mount *mp;
76 int flags;
77 struct thread *td;
78 {
79
80 return (0);
81 }
82
83 /*
84 * Return the root of a filesystem.
85 */
86 int
87 ufs_root(mp, vpp)
88 struct mount *mp;
89 struct vnode **vpp;
90 {
91 struct vnode *nvp;
92 int error;
93
94 error = VFS_VGET(mp, (ino_t)ROOTINO, LK_EXCLUSIVE, &nvp);
95 if (error)
96 return (error);
97 *vpp = nvp;
98 return (0);
99 }
100
101 /*
102 * Do operations associated with quotas
103 */
104 int
105 ufs_quotactl(mp, cmds, uid, arg, td)
106 struct mount *mp;
107 int cmds;
108 uid_t uid;
109 caddr_t arg;
110 struct thread *td;
111 {
112 #ifndef QUOTA
113 return (EOPNOTSUPP);
114 #else
115 int cmd, type, error;
116
117 if (uid == -1)
118 uid = td->td_ucred->cr_ruid;
119 cmd = cmds >> SUBCMDSHIFT;
120 type = cmds & SUBCMDMASK;
121 if ((u_int)type >= MAXQUOTAS)
122 return (EINVAL);
123
124 if (vfs_busy(mp, LK_NOWAIT, 0, td))
125 return (0);
126
127 switch (cmd) {
128 case Q_QUOTAON:
129 error = quotaon(td, mp, type, arg);
130 break;
131
132 case Q_QUOTAOFF:
133 error = quotaoff(td, mp, type);
134 break;
135
136 case Q_SETQUOTA:
137 error = setquota(td, mp, uid, type, arg);
138 break;
139
140 case Q_SETUSE:
141 error = setuse(td, mp, uid, type, arg);
142 break;
143
144 case Q_GETQUOTA:
145 error = getquota(td, mp, uid, type, arg);
146 break;
147
148 case Q_SYNC:
149 error = qsync(mp);
150 break;
151
152 default:
153 error = EINVAL;
154 break;
155 }
156 vfs_unbusy(mp, td);
157 return (error);
158 #endif
159 }
160
161 /*
162 * Initial UFS filesystems, done only once.
163 */
164 int
165 ufs_init(vfsp)
166 struct vfsconf *vfsp;
167 {
168
169 ufs_ihashinit();
170 #ifdef QUOTA
171 dqinit();
172 #endif
173 #ifdef UFS_DIRHASH
174 ufsdirhash_init();
175 #endif
176 return (0);
177 }
178
179 /*
180 * Uninitialise UFS filesystems, done before module unload.
181 */
182 int
183 ufs_uninit(vfsp)
184 struct vfsconf *vfsp;
185 {
186
187 ufs_ihashuninit();
188 #ifdef QUOTA
189 dquninit();
190 #endif
191 #ifdef UFS_DIRHASH
192 ufsdirhash_uninit();
193 #endif
194 return (0);
195 }
196
197 /*
198 * This is the generic part of fhtovp called after the underlying
199 * filesystem has validated the file handle.
200 *
201 * Call the VFS_CHECKEXP beforehand to verify access.
202 */
203 int
204 ufs_fhtovp(mp, ufhp, vpp)
205 struct mount *mp;
206 struct ufid *ufhp;
207 struct vnode **vpp;
208 {
209 struct inode *ip;
210 struct vnode *nvp;
211 int error;
212
213 error = VFS_VGET(mp, ufhp->ufid_ino, LK_EXCLUSIVE, &nvp);
214 if (error) {
215 *vpp = NULLVP;
216 return (error);
217 }
218 ip = VTOI(nvp);
219 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen ||
220 ip->i_effnlink <= 0) {
221 vput(nvp);
222 *vpp = NULLVP;
223 return (ESTALE);
224 }
225 *vpp = nvp;
226 return (0);
227 }
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