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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* $NetBSD: procfs_vfsops.c,v 1.23 1995/03/09 12:05:54 mycroft Exp $ */
23:
24: /*
25: * Copyright (c) 1993 Jan-Simon Pendry
26: * Copyright (c) 1993
27: * The Regents of the University of California. All rights reserved.
28: *
29: * This code is derived from software contributed to Berkeley by
30: * Jan-Simon Pendry.
31: *
32: * Redistribution and use in source and binary forms, with or without
33: * modification, are permitted provided that the following conditions
34: * are met:
35: * 1. Redistributions of source code must retain the above copyright
36: * notice, this list of conditions and the following disclaimer.
37: * 2. Redistributions in binary form must reproduce the above copyright
38: * notice, this list of conditions and the following disclaimer in the
39: * documentation and/or other materials provided with the distribution.
40: * 3. All advertising materials mentioning features or use of this software
41: * must display the following acknowledgement:
42: * This product includes software developed by the University of
43: * California, Berkeley and its contributors.
44: * 4. Neither the name of the University nor the names of its contributors
45: * may be used to endorse or promote products derived from this software
46: * without specific prior written permission.
47: *
48: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58: * SUCH DAMAGE.
59: *
60: * @(#)procfs_vfsops.c 8.5 (Berkeley) 6/15/94
61: */
62:
63: /*
64: * procfs VFS interface
65: */
66:
67: #include <sys/param.h>
68: #include <sys/time.h>
69: #include <sys/kernel.h>
70: #include <sys/proc.h>
71: #include <sys/buf.h>
72: #include <sys/syslog.h>
73: #include <sys/mount.h>
74: #include <sys/signalvar.h>
75: #include <sys/vnode.h>
76: #include <miscfs/procfs/procfs.h>
77: #include <vm/vm.h> /* for PAGE_SIZE */
78:
79: /*
80: * VFS Operations.
81: *
82: * mount system call
83: */
84: /* ARGSUSED */
85: procfs_mount(mp, path, data, ndp, p)
86: struct mount *mp;
87: char *path;
88: caddr_t data;
89: struct nameidata *ndp;
90: struct proc *p;
91: {
92: size_t size;
93:
94: if (UIO_MX & (UIO_MX-1)) {
95: log(LOG_ERR, "procfs: invalid directory entry size");
96: return (EINVAL);
97: }
98:
99: if (mp->mnt_flag & MNT_UPDATE)
100: return (EOPNOTSUPP);
101:
102: mp->mnt_flag |= MNT_LOCAL;
103: mp->mnt_data = 0;
104: getnewfsid(mp, makefstype(MOUNT_PROCFS));
105:
106: (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size);
107: bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
108: bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
109: bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs"));
110: return (0);
111: }
112:
113: /*
114: * unmount system call
115: */
116: procfs_unmount(mp, mntflags, p)
117: struct mount *mp;
118: int mntflags;
119: struct proc *p;
120: {
121: int error;
122: extern int doforce;
123: int flags = 0;
124:
125: if (mntflags & MNT_FORCE) {
126: /* procfs can never be rootfs so don't check for it */
127: if (!doforce)
128: return (EINVAL);
129: flags |= FORCECLOSE;
130: }
131:
132: if (error = vflush(mp, 0, flags))
133: return (error);
134:
135: return (0);
136: }
137:
138: procfs_root(mp, vpp)
139: struct mount *mp;
140: struct vnode **vpp;
141: {
142:
143: return (procfs_allocvp(mp, vpp, 0, Proot));
144: }
145:
146: /* ARGSUSED */
147: procfs_start(mp, flags, p)
148: struct mount *mp;
149: int flags;
150: struct proc *p;
151: {
152:
153: return (0);
154: }
155:
156: /*
157: * Get file system statistics.
158: */
159: procfs_statfs(mp, sbp, p)
160: struct mount *mp;
161: struct statfs *sbp;
162: struct proc *p;
163: {
164:
165: #ifdef COMPAT_09
166: sbp->f_type = 10;
167: #else
168: sbp->f_type = 0;
169: #endif
170: sbp->f_bsize = PAGE_SIZE;
171: sbp->f_iosize = PAGE_SIZE;
172: sbp->f_blocks = 1; /* avoid divide by zero in some df's */
173: sbp->f_bfree = 0;
174: sbp->f_bavail = 0;
175: sbp->f_files = maxproc; /* approx */
176: sbp->f_ffree = maxproc - nprocs; /* approx */
177: if (sbp != &mp->mnt_stat) {
178: bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
179: bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
180: bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
181: }
182: strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
183: sbp->f_fstypename[MFSNAMELEN] = '\0';
184: return (0);
185: }
186:
187: procfs_quotactl(mp, cmds, uid, arg, p)
188: struct mount *mp;
189: int cmds;
190: uid_t uid;
191: caddr_t arg;
192: struct proc *p;
193: {
194:
195: return (EOPNOTSUPP);
196: }
197:
198: procfs_sync(mp, waitfor)
199: struct mount *mp;
200: int waitfor;
201: {
202:
203: return (0);
204: }
205:
206: procfs_vget(mp, ino, vpp)
207: struct mount *mp;
208: ino_t ino;
209: struct vnode **vpp;
210: {
211:
212: return (EOPNOTSUPP);
213: }
214:
215: procfs_fhtovp(mp, fhp, vpp)
216: struct mount *mp;
217: struct fid *fhp;
218: struct vnode **vpp;
219: {
220:
221: return (EINVAL);
222: }
223:
224: procfs_vptofh(vp, fhp)
225: struct vnode *vp;
226: struct fid *fhp;
227: {
228:
229: return (EINVAL);
230: }
231:
232: procfs_init()
233: {
234:
235: return (0);
236: }
237:
238: struct vfsops procfs_vfsops = {
239: MOUNT_PROCFS,
240: procfs_mount,
241: procfs_start,
242: procfs_unmount,
243: procfs_root,
244: procfs_quotactl,
245: procfs_statfs,
246: procfs_sync,
247: procfs_vget,
248: procfs_fhtovp,
249: procfs_vptofh,
250: procfs_init,
251: };
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