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 * $FreeBSD$
40 */
41
42 #include "opt_quota.h"
43
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/mount.h>
47 #include <sys/proc.h>
48 #include <sys/malloc.h>
49 #include <sys/vnode.h>
50
51 #include <ufs/ufs/quota.h>
52 #include <ufs/ufs/inode.h>
53 #include <ufs/ufs/ufsmount.h>
54 #include <ufs/ufs/ufs_extern.h>
55
56 MALLOC_DEFINE(M_UFSMNT, "UFS mount", "UFS mount structure");
57 /*
58 * Make a filesystem operational.
59 * Nothing to do at the moment.
60 */
61 /* ARGSUSED */
62 int
63 ufs_start(mp, flags, p)
64 struct mount *mp;
65 int flags;
66 struct proc *p;
67 {
68
69 return (0);
70 }
71
72 /*
73 * Return the root of a filesystem.
74 */
75 int
76 ufs_root(mp, vpp)
77 struct mount *mp;
78 struct vnode **vpp;
79 {
80 struct vnode *nvp;
81 int error;
82
83 error = VFS_VGET(mp, (ino_t)ROOTINO, &nvp);
84 if (error)
85 return (error);
86 *vpp = nvp;
87 return (0);
88 }
89
90 /*
91 * Do operations associated with quotas
92 */
93 int
94 ufs_quotactl(mp, cmds, uid, arg, p)
95 struct mount *mp;
96 int cmds;
97 uid_t uid;
98 caddr_t arg;
99 struct proc *p;
100 {
101 #ifndef QUOTA
102 return (EOPNOTSUPP);
103 #else
104 int cmd, type, error;
105
106 if (uid == -1)
107 uid = p->p_cred->p_ruid;
108 cmd = cmds >> SUBCMDSHIFT;
109
110 switch (cmd) {
111 case Q_SYNC:
112 break;
113 case Q_GETQUOTA:
114 if (uid == p->p_cred->p_ruid)
115 break;
116 /* fall through */
117 default:
118 if (error = suser(p->p_ucred, &p->p_acflag))
119 return (error);
120 }
121
122 type = cmds & SUBCMDMASK;
123 if ((u_int)type >= MAXQUOTAS)
124 return (EINVAL);
125 if (vfs_busy(mp, LK_NOWAIT, 0, p))
126 return (0);
127
128 switch (cmd) {
129
130 case Q_QUOTAON:
131 error = quotaon(p, mp, type, arg);
132 break;
133
134 case Q_QUOTAOFF:
135 error = quotaoff(p, mp, type);
136 break;
137
138 case Q_SETQUOTA:
139 error = setquota(mp, uid, type, arg);
140 break;
141
142 case Q_SETUSE:
143 error = setuse(mp, uid, type, arg);
144 break;
145
146 case Q_GETQUOTA:
147 error = getquota(mp, uid, type, arg);
148 break;
149
150 case Q_SYNC:
151 error = qsync(mp);
152 break;
153
154 default:
155 error = EINVAL;
156 break;
157 }
158 vfs_unbusy(mp, p);
159 return (error);
160 #endif
161 }
162
163 /*
164 * Initial UFS filesystems, done only once.
165 */
166 int
167 ufs_init(vfsp)
168 struct vfsconf *vfsp;
169 {
170 static int done;
171
172 if (done)
173 return (0);
174 done = 1;
175 ufs_ihashinit();
176 #ifdef QUOTA
177 dqinit();
178 #endif
179 return (0);
180 }
181
182 /*
183 * This is the generic part of fhtovp called after the underlying
184 * filesystem has validated the file handle.
185 *
186 * Verify that a host should have access to a filesystem, and if so
187 * return a vnode for the presented file handle.
188 */
189 int
190 ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)
191 register struct mount *mp;
192 struct ufid *ufhp;
193 struct sockaddr *nam;
194 struct vnode **vpp;
195 int *exflagsp;
196 struct ucred **credanonp;
197 {
198 register struct inode *ip;
199 register struct netcred *np;
200 register struct ufsmount *ump = VFSTOUFS(mp);
201 struct vnode *nvp;
202 int error;
203
204 /*
205 * Get the export permission structure for this <mp, client> tuple.
206 */
207 np = vfs_export_lookup(mp, &ump->um_export, nam);
208 if (np == NULL)
209 return (EACCES);
210
211 error = VFS_VGET(mp, ufhp->ufid_ino, &nvp);
212 if (error) {
213 *vpp = NULLVP;
214 return (error);
215 }
216 ip = VTOI(nvp);
217 if (ip->i_mode == 0 || ip->i_gen != ufhp->ufid_gen) {
218 vput(nvp);
219 *vpp = NULLVP;
220 return (ESTALE);
221 }
222 *vpp = nvp;
223 *exflagsp = np->netc_exflags;
224 *credanonp = &np->netc_anon;
225 return (0);
226 }
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