90688fce27
'const char *', and 'void *', respectively. The second arg is taken directly from user arguments, and is const there, so must be const in the prototypes and functions. The third arg is also taken directly from user arguments. It doesn't have to be changed, but since it's cleaner to keep the type the same as the user arg's type, and I'm already making the 'const char *' change...
262 lines
6.0 KiB
C
262 lines
6.0 KiB
C
/* $NetBSD: procfs_vfsops.c,v 1.26 1996/12/22 10:10:27 cgd Exp $ */
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/*
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* Copyright (c) 1993 Jan-Simon Pendry
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)procfs_vfsops.c 8.5 (Berkeley) 6/15/94
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*/
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/*
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* procfs VFS interface
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/buf.h>
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#include <sys/syslog.h>
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#include <sys/mount.h>
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#include <sys/signalvar.h>
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#include <sys/vnode.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h> /* for PAGE_SIZE */
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int procfs_mount __P((struct mount *, const char *, void *,
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struct nameidata *, struct proc *));
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int procfs_start __P((struct mount *, int, struct proc *));
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int procfs_unmount __P((struct mount *, int, struct proc *));
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int procfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
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struct proc *));
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int procfs_statfs __P((struct mount *, struct statfs *, struct proc *));
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int procfs_sync __P((struct mount *, int, struct ucred *, struct proc *));
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int procfs_vget __P((struct mount *, ino_t, struct vnode **));
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int procfs_fhtovp __P((struct mount *, struct fid *, struct mbuf *,
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struct vnode **, int *, struct ucred **));
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int procfs_vptofh __P((struct vnode *, struct fid *));
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/*
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* VFS Operations.
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*
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* mount system call
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*/
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/* ARGSUSED */
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int
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procfs_mount(mp, path, data, ndp, p)
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struct mount *mp;
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const char *path;
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void *data;
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struct nameidata *ndp;
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struct proc *p;
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{
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size_t size;
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if (UIO_MX & (UIO_MX-1)) {
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log(LOG_ERR, "procfs: invalid directory entry size");
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return (EINVAL);
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}
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if (mp->mnt_flag & MNT_UPDATE)
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return (EOPNOTSUPP);
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mp->mnt_flag |= MNT_LOCAL;
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mp->mnt_data = 0;
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getnewfsid(mp, makefstype(MOUNT_PROCFS));
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(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size);
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bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
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bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
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bcopy("procfs", mp->mnt_stat.f_mntfromname, sizeof("procfs"));
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return (0);
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}
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/*
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* unmount system call
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*/
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int
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procfs_unmount(mp, mntflags, p)
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struct mount *mp;
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int mntflags;
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struct proc *p;
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{
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int error;
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extern int doforce;
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int flags = 0;
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if (mntflags & MNT_FORCE) {
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/* procfs can never be rootfs so don't check for it */
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if (!doforce)
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return (EINVAL);
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flags |= FORCECLOSE;
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}
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if ((error = vflush(mp, 0, flags)) != 0)
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return (error);
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return (0);
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}
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int
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procfs_root(mp, vpp)
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struct mount *mp;
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struct vnode **vpp;
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{
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return (procfs_allocvp(mp, vpp, 0, Proot));
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}
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/* ARGSUSED */
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int
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procfs_start(mp, flags, p)
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struct mount *mp;
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int flags;
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struct proc *p;
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{
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return (0);
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}
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/*
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* Get file system statistics.
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*/
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int
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procfs_statfs(mp, sbp, p)
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struct mount *mp;
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struct statfs *sbp;
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struct proc *p;
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{
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#ifdef COMPAT_09
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sbp->f_type = 10;
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#else
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sbp->f_type = 0;
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#endif
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sbp->f_bsize = PAGE_SIZE;
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sbp->f_iosize = PAGE_SIZE;
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sbp->f_blocks = 1; /* avoid divide by zero in some df's */
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sbp->f_bfree = 0;
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sbp->f_bavail = 0;
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sbp->f_files = maxproc; /* approx */
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sbp->f_ffree = maxproc - nprocs; /* approx */
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if (sbp != &mp->mnt_stat) {
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bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
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bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
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bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
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}
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strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
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return (0);
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}
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/*ARGSUSED*/
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int
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procfs_quotactl(mp, cmds, uid, arg, p)
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struct mount *mp;
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int cmds;
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uid_t uid;
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caddr_t arg;
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struct proc *p;
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{
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return (EOPNOTSUPP);
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}
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/*ARGSUSED*/
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int
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procfs_sync(mp, waitfor, uc, p)
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struct mount *mp;
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int waitfor;
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struct ucred *uc;
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struct proc *p;
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{
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return (0);
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}
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/*ARGSUSED*/
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int
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procfs_vget(mp, ino, vpp)
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struct mount *mp;
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ino_t ino;
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struct vnode **vpp;
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{
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return (EOPNOTSUPP);
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}
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/*ARGSUSED*/
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int
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procfs_fhtovp(mp, fhp, mb, vpp, what, anon)
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struct mount *mp;
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struct fid *fhp;
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struct mbuf *mb;
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struct vnode **vpp;
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int *what;
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struct ucred **anon;
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{
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return (EINVAL);
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}
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/*ARGSUSED*/
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int
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procfs_vptofh(vp, fhp)
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struct vnode *vp;
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struct fid *fhp;
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{
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return (EINVAL);
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}
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void
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procfs_init()
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{
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}
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struct vfsops procfs_vfsops = {
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MOUNT_PROCFS,
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procfs_mount,
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procfs_start,
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procfs_unmount,
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procfs_root,
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procfs_quotactl,
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procfs_statfs,
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procfs_sync,
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procfs_vget,
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procfs_fhtovp,
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procfs_vptofh,
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procfs_init,
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};
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