1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93
| 1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93
|
30 * $FreeBSD: head/sys/fs/deadfs/dead_vnops.c 143506 2005-03-13 12:06:20Z jeff $
| 30 * $FreeBSD: head/sys/fs/deadfs/dead_vnops.c 155896 2006-02-22 06:11:59Z jeff $
|
31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/poll.h>
39#include <sys/vnode.h>
40
41/*
42 * Prototypes for dead operations on vnodes.
43 */
44static vop_bmap_t dead_bmap;
45static vop_ioctl_t dead_ioctl;
46static vop_lookup_t dead_lookup;
47static vop_open_t dead_open;
48static vop_poll_t dead_poll;
49static vop_read_t dead_read;
50static vop_write_t dead_write;
| 31 */
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/poll.h>
39#include <sys/vnode.h>
40
41/*
42 * Prototypes for dead operations on vnodes.
43 */
44static vop_bmap_t dead_bmap;
45static vop_ioctl_t dead_ioctl;
46static vop_lookup_t dead_lookup;
47static vop_open_t dead_open;
48static vop_poll_t dead_poll;
49static vop_read_t dead_read;
50static vop_write_t dead_write;
|
| 51static vop_getwritemount_t dead_getwritemount;
|
51
52struct vop_vector dead_vnodeops = {
53 .vop_default = &default_vnodeops,
54
55 .vop_access = VOP_EBADF,
56 .vop_advlock = VOP_EBADF,
57 .vop_bmap = dead_bmap,
58 .vop_create = VOP_PANIC,
59 .vop_getattr = VOP_EBADF,
| 52
53struct vop_vector dead_vnodeops = {
54 .vop_default = &default_vnodeops,
55
56 .vop_access = VOP_EBADF,
57 .vop_advlock = VOP_EBADF,
58 .vop_bmap = dead_bmap,
59 .vop_create = VOP_PANIC,
60 .vop_getattr = VOP_EBADF,
|
| 61 .vop_getwritemount = dead_getwritemount,
|
60 .vop_inactive = VOP_NULL,
61 .vop_ioctl = dead_ioctl,
62 .vop_link = VOP_PANIC,
63 .vop_lookup = dead_lookup,
64 .vop_mkdir = VOP_PANIC,
65 .vop_mknod = VOP_PANIC,
66 .vop_open = dead_open,
67 .vop_pathconf = VOP_EBADF, /* per pathconf(2) */
68 .vop_poll = dead_poll,
69 .vop_read = dead_read,
70 .vop_readdir = VOP_EBADF,
71 .vop_readlink = VOP_EBADF,
72 .vop_reclaim = VOP_NULL,
73 .vop_remove = VOP_PANIC,
74 .vop_rename = VOP_PANIC,
75 .vop_rmdir = VOP_PANIC,
76 .vop_setattr = VOP_EBADF,
77 .vop_symlink = VOP_PANIC,
78 .vop_write = dead_write,
79};
80
| 62 .vop_inactive = VOP_NULL,
63 .vop_ioctl = dead_ioctl,
64 .vop_link = VOP_PANIC,
65 .vop_lookup = dead_lookup,
66 .vop_mkdir = VOP_PANIC,
67 .vop_mknod = VOP_PANIC,
68 .vop_open = dead_open,
69 .vop_pathconf = VOP_EBADF, /* per pathconf(2) */
70 .vop_poll = dead_poll,
71 .vop_read = dead_read,
72 .vop_readdir = VOP_EBADF,
73 .vop_readlink = VOP_EBADF,
74 .vop_reclaim = VOP_NULL,
75 .vop_remove = VOP_PANIC,
76 .vop_rename = VOP_PANIC,
77 .vop_rmdir = VOP_PANIC,
78 .vop_setattr = VOP_EBADF,
79 .vop_symlink = VOP_PANIC,
80 .vop_write = dead_write,
81};
82
|
| 83/* ARGSUSED */
84static int
85dead_getwritemount(ap)
86 struct vop_getwritemount_args /* {
87 struct vnode *a_vp;
88 struct mount **a_mpp;
89 } */ *ap;
90{
91 *(ap->a_mpp) = NULL;
92 return (0);
93}
94
|
81/*
82 * Trivial lookup routine that always fails.
83 */
84/* ARGSUSED */
85static int
86dead_lookup(ap)
87 struct vop_lookup_args /* {
88 struct vnode * a_dvp;
89 struct vnode ** a_vpp;
90 struct componentname * a_cnp;
91 } */ *ap;
92{
93
94 *ap->a_vpp = NULL;
95 return (ENOTDIR);
96}
97
98/*
99 * Open always fails as if device did not exist.
100 */
101/* ARGSUSED */
102static int
103dead_open(ap)
104 struct vop_open_args /* {
105 struct vnode *a_vp;
106 int a_mode;
107 struct ucred *a_cred;
108 struct proc *a_p;
109 } */ *ap;
110{
111
112 return (ENXIO);
113}
114
115/*
116 * Vnode op for read
117 */
118/* ARGSUSED */
119static int
120dead_read(ap)
121 struct vop_read_args /* {
122 struct vnode *a_vp;
123 struct uio *a_uio;
124 int a_ioflag;
125 struct ucred *a_cred;
126 } */ *ap;
127{
128 /*
129 * Return EOF for tty devices, EIO for others
130 */
131 if ((ap->a_vp->v_vflag & VV_ISTTY) == 0)
132 return (EIO);
133 return (0);
134}
135
136/*
137 * Vnode op for write
138 */
139/* ARGSUSED */
140static int
141dead_write(ap)
142 struct vop_write_args /* {
143 struct vnode *a_vp;
144 struct uio *a_uio;
145 int a_ioflag;
146 struct ucred *a_cred;
147 } */ *ap;
148{
149 return (EIO);
150}
151
152/*
153 * Device ioctl operation.
154 */
155/* ARGSUSED */
156static int
157dead_ioctl(ap)
158 struct vop_ioctl_args /* {
159 struct vnode *a_vp;
160 u_long a_command;
161 caddr_t a_data;
162 int a_fflag;
163 struct ucred *a_cred;
164 struct proc *a_p;
165 } */ *ap;
166{
167 /* XXX: Doesn't this just recurse back here ? */
168 return (VOP_IOCTL_AP(ap));
169}
170
171/*
172 * Wait until the vnode has finished changing state.
173 */
174static int
175dead_bmap(ap)
176 struct vop_bmap_args /* {
177 struct vnode *a_vp;
178 daddr_t a_bn;
179 struct bufobj **a_bop;
180 daddr_t *a_bnp;
181 int *a_runp;
182 int *a_runb;
183 } */ *ap;
184{
185
186 return (VOP_BMAP(ap->a_vp, ap->a_bn, ap->a_bop, ap->a_bnp, ap->a_runp, ap->a_runb));
187}
188
189/*
190 * Trivial poll routine that always returns POLLHUP.
191 * This is necessary so that a process which is polling a file
192 * gets notified when that file is revoke()d.
193 */
194static int
195dead_poll(ap)
196 struct vop_poll_args *ap;
197{
198 return (POLLHUP);
199}
| 95/*
96 * Trivial lookup routine that always fails.
97 */
98/* ARGSUSED */
99static int
100dead_lookup(ap)
101 struct vop_lookup_args /* {
102 struct vnode * a_dvp;
103 struct vnode ** a_vpp;
104 struct componentname * a_cnp;
105 } */ *ap;
106{
107
108 *ap->a_vpp = NULL;
109 return (ENOTDIR);
110}
111
112/*
113 * Open always fails as if device did not exist.
114 */
115/* ARGSUSED */
116static int
117dead_open(ap)
118 struct vop_open_args /* {
119 struct vnode *a_vp;
120 int a_mode;
121 struct ucred *a_cred;
122 struct proc *a_p;
123 } */ *ap;
124{
125
126 return (ENXIO);
127}
128
129/*
130 * Vnode op for read
131 */
132/* ARGSUSED */
133static int
134dead_read(ap)
135 struct vop_read_args /* {
136 struct vnode *a_vp;
137 struct uio *a_uio;
138 int a_ioflag;
139 struct ucred *a_cred;
140 } */ *ap;
141{
142 /*
143 * Return EOF for tty devices, EIO for others
144 */
145 if ((ap->a_vp->v_vflag & VV_ISTTY) == 0)
146 return (EIO);
147 return (0);
148}
149
150/*
151 * Vnode op for write
152 */
153/* ARGSUSED */
154static int
155dead_write(ap)
156 struct vop_write_args /* {
157 struct vnode *a_vp;
158 struct uio *a_uio;
159 int a_ioflag;
160 struct ucred *a_cred;
161 } */ *ap;
162{
163 return (EIO);
164}
165
166/*
167 * Device ioctl operation.
168 */
169/* ARGSUSED */
170static int
171dead_ioctl(ap)
172 struct vop_ioctl_args /* {
173 struct vnode *a_vp;
174 u_long a_command;
175 caddr_t a_data;
176 int a_fflag;
177 struct ucred *a_cred;
178 struct proc *a_p;
179 } */ *ap;
180{
181 /* XXX: Doesn't this just recurse back here ? */
182 return (VOP_IOCTL_AP(ap));
183}
184
185/*
186 * Wait until the vnode has finished changing state.
187 */
188static int
189dead_bmap(ap)
190 struct vop_bmap_args /* {
191 struct vnode *a_vp;
192 daddr_t a_bn;
193 struct bufobj **a_bop;
194 daddr_t *a_bnp;
195 int *a_runp;
196 int *a_runb;
197 } */ *ap;
198{
199
200 return (VOP_BMAP(ap->a_vp, ap->a_bn, ap->a_bop, ap->a_bnp, ap->a_runp, ap->a_runb));
201}
202
203/*
204 * Trivial poll routine that always returns POLLHUP.
205 * This is necessary so that a process which is polling a file
206 * gets notified when that file is revoke()d.
207 */
208static int
209dead_poll(ap)
210 struct vop_poll_args *ap;
211{
212 return (POLLHUP);
213}
|