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
ufs_root(mp,flags,vpp)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
ufs_quotactl(mp,cmds,id,arg)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 if ((cmds >> SUBCMDSHIFT) == Q_QUOTAON)
96 vfs_unbusy(mp);
97
98 return (EOPNOTSUPP);
99 #else
100 struct thread *td;
101 int cmd, type, error;
102
103 td = curthread;
104 cmd = cmds >> SUBCMDSHIFT;
105 type = cmds & SUBCMDMASK;
106 if (id == -1) {
107 switch (type) {
108
109 case USRQUOTA:
110 id = td->td_ucred->cr_ruid;
111 break;
112
113 case GRPQUOTA:
114 id = td->td_ucred->cr_rgid;
115 break;
116
117 default:
118 if (cmd == Q_QUOTAON)
119 vfs_unbusy(mp);
120 return (EINVAL);
121 }
122 }
123 if ((u_int)type >= MAXQUOTAS) {
124 if (cmd == Q_QUOTAON)
125 vfs_unbusy(mp);
126 return (EINVAL);
127 }
128
129 switch (cmd) {
130 case Q_QUOTAON:
131 error = quotaon(td, mp, type, arg);
132 break;
133
134 case Q_QUOTAOFF:
135 error = quotaoff(td, mp, type);
136 break;
137
138 case Q_SETQUOTA32:
139 error = setquota32(td, mp, id, type, arg);
140 break;
141
142 case Q_SETUSE32:
143 error = setuse32(td, mp, id, type, arg);
144 break;
145
146 case Q_GETQUOTA32:
147 error = getquota32(td, mp, id, type, arg);
148 break;
149
150 case Q_SETQUOTA:
151 error = setquota(td, mp, id, type, arg);
152 break;
153
154 case Q_SETUSE:
155 error = setuse(td, mp, id, type, arg);
156 break;
157
158 case Q_GETQUOTA:
159 error = getquota(td, mp, id, type, arg);
160 break;
161
162 case Q_GETQUOTASIZE:
163 error = getquotasize(td, mp, id, type, arg);
164 break;
165
166 case Q_SYNC:
167 error = qsync(mp);
168 break;
169
170 default:
171 error = EINVAL;
172 break;
173 }
174 return (error);
175 #endif
176 }
177
178 /*
179 * Initial UFS filesystems, done only once.
180 */
181 int
ufs_init(vfsp)182 ufs_init(vfsp)
183 struct vfsconf *vfsp;
184 {
185
186 #ifdef QUOTA
187 dqinit();
188 #endif
189 #ifdef UFS_DIRHASH
190 ufsdirhash_init();
191 #endif
192 return (0);
193 }
194
195 /*
196 * Uninitialise UFS filesystems, done before module unload.
197 */
198 int
ufs_uninit(vfsp)199 ufs_uninit(vfsp)
200 struct vfsconf *vfsp;
201 {
202
203 #ifdef QUOTA
204 dquninit();
205 #endif
206 #ifdef UFS_DIRHASH
207 ufsdirhash_uninit();
208 #endif
209 return (0);
210 }
211
212 /*
213 * This is the generic part of fhtovp called after the underlying
214 * filesystem has validated the file handle.
215 *
216 * Call the VFS_CHECKEXP beforehand to verify access.
217 */
218 int
ufs_fhtovp(mp,ufhp,flags,vpp)219 ufs_fhtovp(mp, ufhp, flags, vpp)
220 struct mount *mp;
221 struct ufid *ufhp;
222 int flags;
223 struct vnode **vpp;
224 {
225 struct inode *ip;
226 struct vnode *nvp;
227 int error;
228
229 error = VFS_VGET(mp, ufhp->ufid_ino, flags, &nvp);
230 if (error) {
231 *vpp = NULLVP;
232 return (error);
233 }
234 ip = VTOI(nvp);
235 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen ||
236 ip->i_effnlink <= 0) {
237 vput(nvp);
238 *vpp = NULLVP;
239 return (ESTALE);
240 }
241 *vpp = nvp;
242 vnode_create_vobject(*vpp, DIP(ip, i_size), curthread);
243 return (0);
244 }
245