1 /* $OpenBSD: ufs_vfsops.c,v 1.11 2003/12/28 17:20:16 tedu Exp $ */
2 /* $NetBSD: ufs_vfsops.c,v 1.4 1996/02/09 22:36:12 christos Exp $ */
3
4 /*
5 * Copyright (c) 1991, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)ufs_vfsops.c 8.4 (Berkeley) 4/16/94
38 */
39
40 #include <sys/param.h>
41 #include <sys/mbuf.h>
42 #include <sys/mount.h>
43 #include <sys/proc.h>
44 #include <sys/buf.h>
45 #include <sys/vnode.h>
46 #include <sys/malloc.h>
47
48 #include <miscfs/specfs/specdev.h>
49
50 #include <ufs/ufs/extattr.h>
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 #ifdef UFS_DIRHASH
56 #include <ufs/ufs/dir.h>
57 #include <ufs/ufs/dirhash.h>
58 #endif
59
60 /*
61 * Make a filesystem operational.
62 * Nothing to do at the moment.
63 */
64 /* ARGSUSED */
65 int
ufs_start(mp,flags,p)66 ufs_start(mp, flags, p)
67 struct mount *mp;
68 int flags;
69 struct proc *p;
70 {
71
72 return (0);
73 }
74
75 /*
76 * Return the root of a filesystem.
77 */
78 int
ufs_root(mp,vpp)79 ufs_root(mp, vpp)
80 struct mount *mp;
81 struct vnode **vpp;
82 {
83 struct vnode *nvp;
84 int error;
85
86 if ((error = VFS_VGET(mp, (ino_t)ROOTINO, &nvp)) != 0)
87 return (error);
88 *vpp = nvp;
89 return (0);
90 }
91
92 /*
93 * Verify a remote client has export rights and return these rights via.
94 * exflagsp and credanonp.
95 */
96 int
ufs_check_export(mp,nam,exflagsp,credanonp)97 ufs_check_export(mp, nam, exflagsp, credanonp)
98 register struct mount *mp;
99 struct mbuf *nam;
100 int *exflagsp;
101 struct ucred **credanonp;
102 {
103 register struct netcred *np;
104 register struct ufsmount *ump = VFSTOUFS(mp);
105
106 /*
107 * Get the export permission structure for this <mp, client> tuple.
108 */
109 np = vfs_export_lookup(mp, &ump->um_export, nam);
110 if (np == NULL)
111 return (EACCES);
112
113 *exflagsp = np->netc_exflags;
114 *credanonp = &np->netc_anon;
115 return (0);
116 }
117
118 /*
119 * Initial UFS filesystems, done only once.
120 */
121 int
ufs_init(vfsp)122 ufs_init(vfsp)
123 struct vfsconf *vfsp;
124 {
125 static int done;
126
127 if (done)
128 return (0);
129 done = 1;
130 ufs_ihashinit();
131 ufs_quota_init();
132 #ifdef UFS_DIRHASH
133 ufsdirhash_init();
134 #endif
135
136 return (0);
137 }
138
139 /*
140 * This is the generic part of fhtovp called after the underlying
141 * filesystem has validated the file handle.
142 */
143 int
ufs_fhtovp(mp,ufhp,vpp)144 ufs_fhtovp(mp, ufhp, vpp)
145 register struct mount *mp;
146 struct ufid *ufhp;
147 struct vnode **vpp;
148 {
149 register struct inode *ip;
150 struct vnode *nvp;
151 int error;
152
153 if ((error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) != 0) {
154 *vpp = NULLVP;
155 return (error);
156 }
157 ip = VTOI(nvp);
158 if (ip->i_ffs_mode == 0 || ip->i_ffs_gen != ufhp->ufid_gen) {
159 vput(nvp);
160 *vpp = NULLVP;
161 return (ESTALE);
162 }
163 *vpp = nvp;
164 return (0);
165 }
166