91f37dcba1
calls, vnops, vfsops, both in /kern, and to individual file systems that require a vfsop_ array entry. Reviewed by: eivind
180 lines
4.7 KiB
C
180 lines
4.7 KiB
C
/*
|
|
* 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);
|
|
|
|
(void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size);
|
|
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
|
|
|
|
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);
|