[apple/xnu.git] / bsd / miscfs / procfs / procfs_vfsops.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$NetBSD: procfs_vfsops.c,v 1.23 1995/03/09 12:05:54 mycroft 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/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 */

/*
 * VFS Operations.
 *
 * mount system call
 */
/* ARGSUSED */
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
 */
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))
		return (error);

	return (0);
}

procfs_root(mp, vpp)
	struct mount *mp;
	struct vnode **vpp;
{

	return (procfs_allocvp(mp, vpp, 0, Proot));
}

/* ARGSUSED */
procfs_start(mp, flags, p)
	struct mount *mp;
	int flags;
	struct proc *p;
{

	return (0);
}

/*
 * Get file system statistics.
 */
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);
	sbp->f_fstypename[MFSNAMELEN] = '\0';
	return (0);
}

procfs_quotactl(mp, cmds, uid, arg, p)
	struct mount *mp;
	int cmds;
	uid_t uid;
	caddr_t arg;
	struct proc *p;
{

	return (EOPNOTSUPP);
}

procfs_sync(mp, waitfor)
	struct mount *mp;
	int waitfor;
{

	return (0);
}

procfs_vget(mp, ino, vpp)
	struct mount *mp;
	ino_t ino;
	struct vnode **vpp;
{

	return (EOPNOTSUPP);
}

procfs_fhtovp(mp, fhp, vpp)
	struct mount *mp;
	struct fid *fhp;
	struct vnode **vpp;
{

	return (EINVAL);
}

procfs_vptofh(vp, fhp)
	struct vnode *vp;
	struct fid *fhp;
{

	return (EINVAL);
}

procfs_init()
{

	return (0);
}

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,
};
Commit	Line	Data
1c79356b A	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	};