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 * 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_vfsops.c 8.8 (Berkeley) 5/20/95
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/kernel.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/mount.h>
49 #include <sys/proc.h>
50 #include <sys/socket.h>
51 #include <sys/vnode.h>
52
53 #include <ufs/ufs/extattr.h>
54 #include <ufs/ufs/quota.h>
55 #include <ufs/ufs/inode.h>
56 #include <ufs/ufs/ufsmount.h>
57 #include <ufs/ufs/ufs_extern.h>
58 #ifdef UFS_DIRHASH
59 #include <ufs/ufs/dir.h>
60 #include <ufs/ufs/dirhash.h>
61 #endif
62
63 MALLOC_DEFINE(M_UFSMNT, "ufs_mount", "UFS mount structure");
64
65 /*
66 * Return the root of a filesystem.
67 */
68 int
69 ufs_root(mp, flags, vpp)
70 struct mount *mp;
71 int flags;
72 struct vnode **vpp;
73 {
74 struct vnode *nvp;
75 int error;
76
77 error = VFS_VGET(mp, (ino_t)ROOTINO, flags, &nvp);
78 if (error)
79 return (error);
80 *vpp = nvp;
81 return (0);
82 }
83
84 /*
85 * Do operations associated with quotas
86 */
87 int
88 ufs_quotactl(mp, cmds, id, arg)
89 struct mount *mp;
90 int cmds;
91 uid_t id;
92 void *arg;
93 {
94 #ifndef QUOTA
95 return (EOPNOTSUPP);
96 #else
97 struct thread *td;
98 int cmd, type, error;
99
100 td = curthread;
101 cmd = cmds >> SUBCMDSHIFT;
102 type = cmds & SUBCMDMASK;
103 if (id == -1) {
104 switch (type) {
105
106 case USRQUOTA:
107 id = td->td_ucred->cr_ruid;
108 break;
109
110 case GRPQUOTA:
111 id = td->td_ucred->cr_rgid;
112 break;
113
114 default:
115 return (EINVAL);
116 }
117 }
118 if ((u_int)type >= MAXQUOTAS)
119 return (EINVAL);
120
121 switch (cmd) {
122 case Q_QUOTAON:
123 error = quotaon(td, mp, type, arg);
124 break;
125
126 case Q_QUOTAOFF:
127 error = quotaoff(td, mp, type);
128 break;
129
130 case Q_SETQUOTA32:
131 error = setquota32(td, mp, id, type, arg);
132 break;
133
134 case Q_SETUSE32:
135 error = setuse32(td, mp, id, type, arg);
136 break;
137
138 case Q_GETQUOTA32:
139 error = getquota32(td, mp, id, type, arg);
140 break;
141
142 case Q_SETQUOTA:
143 error = setquota(td, mp, id, type, arg);
144 break;
145
146 case Q_SETUSE:
147 error = setuse(td, mp, id, type, arg);
148 break;
149
150 case Q_GETQUOTA:
151 error = getquota(td, mp, id, type, arg);
152 break;
153
154 case Q_GETQUOTASIZE:
155 error = getquotasize(td, mp, id, type, arg);
156 break;
157
158 case Q_SYNC:
159 error = qsync(mp);
160 break;
161
162 default:
163 error = EINVAL;
164 break;
165 }
166 return (error);
167 #endif
168 }
169
170 /*
171 * Initial UFS filesystems, done only once.
172 */
173 int
174 ufs_init(vfsp)
175 struct vfsconf *vfsp;
176 {
177
178 #ifdef QUOTA
179 dqinit();
180 #endif
181 #ifdef UFS_DIRHASH
182 ufsdirhash_init();
183 #endif
184 return (0);
185 }
186
187 /*
188 * Uninitialise UFS filesystems, done before module unload.
189 */
190 int
191 ufs_uninit(vfsp)
192 struct vfsconf *vfsp;
193 {
194
195 #ifdef QUOTA
196 dquninit();
197 #endif
198 #ifdef UFS_DIRHASH
199 ufsdirhash_uninit();
200 #endif
201 return (0);
202 }
203
204 /*
205 * This is the generic part of fhtovp called after the underlying
206 * filesystem has validated the file handle.
207 *
208 * Call the VFS_CHECKEXP beforehand to verify access.
209 */
210 int
211 ufs_fhtovp(mp, ufhp, flags, vpp)
212 struct mount *mp;
213 struct ufid *ufhp;
214 int flags;
215 struct vnode **vpp;
216 {
217 struct inode *ip;
218 struct vnode *nvp;
219 int error;
220
221 error = VFS_VGET(mp, ufhp->ufid_ino, flags, &nvp);
222 if (error) {
223 *vpp = NULLVP;
224 return (error);
225 }
226 ip = VTOI(nvp);
227 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen ||
228 ip->i_effnlink <= 0) {
229 vput(nvp);
230 *vpp = NULLVP;
231 return (ESTALE);
232 }
233 *vpp = nvp;
234 vnode_create_vobject(*vpp, DIP(ip, i_size), curthread);
235 return (0);
236 }
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