1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/* $OpenBSD: procfs_vfsops.c,v 1.2 1996/02/27 08:03:38 niklas Exp $ */
/* $NetBSD: procfs_vfsops.c,v 1.25 1996/02/09 22:40:53 christos Exp $ */
/*
* Copyright (c) 1993 Jan-Simon Pendry
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)procfs_vfsops.c 8.5 (Berkeley) 6/15/94
*/
/*
* procfs VFS interface
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/syslog.h>
#include <sys/mount.h>
#include <sys/signalvar.h>
#include <sys/vnode.h>
#include <miscfs/procfs/procfs.h>
#include <vm/vm.h> /* for PAGE_SIZE */
int procfs_mount __P((struct mount *, char *, caddr_t,
struct nameidata *, struct proc *));
int procfs_start __P((struct mount *, int, struct proc *));
int procfs_unmount __P((struct mount *, int, struct proc *));
int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
struct proc *));
int procfs_statfs __P((struct mount *, struct statfs *, struct proc *));
int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *));
int procfs_vget __P((struct mount *, ino_t, struct vnode **));
int procfs_fhtovp __P((struct mount *, struct fid *, struct mbuf *,
struct vnode **, int *, struct ucred **));
int procfs_vptofh __P((struct vnode *, struct fid *));
/*
* VFS Operations.
*
* mount system call
*/
/* ARGSUSED */
int
procfs_mount(mp, path, data, ndp, p)
struct mount *mp;
char *path;
caddr_t data;
struct nameidata *ndp;
struct proc *p;
{
size_t size;
if (UIO_MX & (UIO_MX-1)) {
log(LOG_ERR, "procfs: invalid directory entry size");
return (EINVAL);
}
if (mp->mnt_flag & MNT_UPDATE)
return (EOPNOTSUPP);
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_data = 0;
getnewfsid(mp, makefstype(MOUNT_PROCFS));
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size);
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs"));
return (0);
}
/*
* unmount system call
*/
int
procfs_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
int error;
extern int doforce;
int flags = 0;
if (mntflags & MNT_FORCE) {
/* procfs can never be rootfs so don't check for it */
if (!doforce)
return (EINVAL);
flags |= FORCECLOSE;
}
if ((error = vflush(mp, 0, flags)) != 0)
return (error);
return (0);
}
int
procfs_root(mp, vpp)
struct mount *mp;
struct vnode **vpp;
{
return (procfs_allocvp(mp, vpp, 0, Proot));
}
/* ARGSUSED */
int
procfs_start(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
return (0);
}
/*
* Get file system statistics.
*/
int
procfs_statfs(mp, sbp, p)
struct mount *mp;
struct statfs *sbp;
struct proc *p;
{
#ifdef COMPAT_09
sbp->f_type = 10;
#else
sbp->f_type = 0;
#endif
sbp->f_bsize = PAGE_SIZE;
sbp->f_iosize = PAGE_SIZE;
sbp->f_blocks = 1; /* avoid divide by zero in some df's */
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = maxproc; /* approx */
sbp->f_ffree = maxproc - nprocs; /* approx */
if (sbp != &mp->mnt_stat) {
bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
return (0);
}
/*ARGSUSED*/
int
procfs_quotactl(mp, cmds, uid, arg, p)
struct mount *mp;
int cmds;
uid_t uid;
caddr_t arg;
struct proc *p;
{
return (EOPNOTSUPP);
}
/*ARGSUSED*/
int
procfs_sync(mp, waitfor, uc, p)
struct mount *mp;
int waitfor;
struct ucred *uc;
struct proc *p;
{
return (0);
}
/*ARGSUSED*/
int
procfs_vget(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
return (EOPNOTSUPP);
}
/*ARGSUSED*/
int
procfs_fhtovp(mp, fhp, mb, vpp, what, anon)
struct mount *mp;
struct fid *fhp;
struct mbuf *mb;
struct vnode **vpp;
int *what;
struct ucred **anon;
{
return (EINVAL);
}
/*ARGSUSED*/
int
procfs_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
return (EINVAL);
}
void
procfs_init()
{
}
struct vfsops procfs_vfsops = {
MOUNT_PROCFS,
procfs_mount,
procfs_start,
procfs_unmount,
procfs_root,
procfs_quotactl,
procfs_statfs,
procfs_sync,
procfs_vget,
procfs_fhtovp,
procfs_vptofh,
procfs_init,
};
|
