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/*
* 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 8.7 (Berkeley) 5/10/95
*
* $FreeBSD$
*/
/*
* procfs VFS interface
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <miscfs/procfs/procfs.h>
static int procfs_mount __P((struct mount *mp, char *path, caddr_t data,
struct nameidata *ndp, struct proc *p));
static int procfs_statfs __P((struct mount *mp, struct statfs *sbp,
struct proc *p));
static int procfs_unmount __P((struct mount *mp, int mntflags,
struct proc *p));
/*
* VFS Operations.
*
* mount system call
*/
/* ARGSUSED */
static 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;
int error;
if (mp->mnt_flag & MNT_UPDATE)
return (EOPNOTSUPP);
if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(procfs_exit))) {
printf("procfs: cannot register procfs_exit with at_exit\n");
return(error);
}
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_data = 0;
vfs_getnewfsid(mp);
size = sizeof("procfs") - 1;
bcopy("procfs", mp->mnt_stat.f_mntfromname, size);
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
(void)procfs_statfs(mp, &mp->mnt_stat, p);
return (0);
}
/*
* unmount system call
*/
static int
procfs_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
int error;
int flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
error = vflush(mp, 0, flags);
if (error)
return (error);
if (mp->mnt_vfc->vfc_refcount == 1)
rm_at_exit(procfs_exit);
return (0);
}
int
procfs_root(mp, vpp)
struct mount *mp;
struct vnode **vpp;
{
return (procfs_allocvp(mp, vpp, 0, Proot));
}
/*
* Get file system statistics.
*/
static int
procfs_statfs(mp, sbp, p)
struct mount *mp;
struct statfs *sbp;
struct proc *p;
{
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) {
sbp->f_type = mp->mnt_vfc->vfc_typenum;
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);
}
return (0);
}
static struct vfsops procfs_vfsops = {
procfs_mount,
vfs_stdstart,
procfs_unmount,
procfs_root,
vfs_stdquotactl,
procfs_statfs,
vfs_stdsync,
vfs_stdvget,
vfs_stdfhtovp,
vfs_stdcheckexp,
vfs_stdvptofh,
vfs_stdinit,
vfs_stduninit,
vfs_stdextattrctl,
};
VFS_SET(procfs_vfsops, procfs, VFCF_SYNTHETIC);
MODULE_VERSION(procfs, 1);
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