2 * Copyright (c) 2000 Dag-Erling Coïdan Smørgrav
3 * Copyright (c) 1999 Pierre Beyssac
4 * Copyright (c) 1993 Jan-Simon Pendry
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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39 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
41 * $FreeBSD: src/sys/i386/linux/linprocfs/linprocfs_vfsops.c,v 1.2.2.3 2001/10/15 20:42:01 des Exp $
42 * $DragonFly: src/sys/emulation/linux/i386/linprocfs/linprocfs_vfsops.c,v 1.13 2006/07/18 22:22:11 dillon Exp $
46 * procfs VFS interface
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
53 #include <sys/syslog.h>
54 #include <sys/mount.h>
55 #include <sys/vnode.h>
56 #include "linprocfs.h"
58 extern struct vop_ops linprocfs_vnode_vops;
60 static int linprocfs_mount (struct mount *mp, char *path, caddr_t data,
62 static int linprocfs_statfs (struct mount *mp, struct statfs *sbp,
64 static int linprocfs_unmount (struct mount *mp, int mntflags);
73 linprocfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
78 if (mp->mnt_flag & MNT_UPDATE)
81 if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(linprocfs_exit))) {
82 printf("linprocfs: cannot register linprocfs_exit with at_exit\n");
86 mp->mnt_flag |= MNT_LOCAL;
90 vfs_add_vnodeops(mp, &linprocfs_vnode_vops, &mp->mnt_vn_norm_ops);
92 size = sizeof("linprocfs") - 1;
93 bcopy("linprocfs", mp->mnt_stat.f_mntfromname, size);
94 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
95 (void)linprocfs_statfs(mp, &mp->mnt_stat, cred);
101 * unmount system call
104 linprocfs_unmount(struct mount *mp, int mntflags)
109 if (mntflags & MNT_FORCE)
112 error = vflush(mp, 0, flags);
116 if (mp->mnt_vfc->vfc_refcount == 1)
117 rm_at_exit(linprocfs_exit);
123 linprocfs_root(struct mount *mp, struct vnode **vpp)
126 return (linprocfs_allocvp(mp, vpp, 0, Proot));
130 * Get file system statistics.
133 linprocfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
135 sbp->f_bsize = PAGE_SIZE;
136 sbp->f_iosize = PAGE_SIZE;
137 sbp->f_blocks = 1; /* avoid divide by zero in some df's */
140 sbp->f_files = maxproc; /* approx */
141 sbp->f_ffree = maxproc - nprocs; /* approx */
143 if (sbp != &mp->mnt_stat) {
144 sbp->f_type = mp->mnt_vfc->vfc_typenum;
145 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
146 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
152 static struct vfsops linprocfs_vfsops = {
167 VFS_SET(linprocfs_vfsops, linprocfs, VFCF_SYNTHETIC);
168 MODULE_DEPEND(linprocfs, procfs, 1, 1, 1);