b47ed6cbf6
each node in order to make it easier to add new entries. Rewrite the internal directory structure so that it is possible to have independent subdirectories. Utilize this to add /proc/net/dev. Reviewed by: DES
180 lines
4.8 KiB
C
180 lines
4.8 KiB
C
/*
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* Copyright (c) 2000 Dag-Erling Coïdan Smørgrav
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* Copyright (c) 1999 Pierre Beyssac
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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 8.7 (Berkeley) 5/10/95
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*
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* $FreeBSD$
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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/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/syslog.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <compat/linprocfs/linprocfs.h>
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static int linprocfs_mount __P((struct mount *mp, char *path, caddr_t data,
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struct nameidata *ndp, struct proc *p));
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static int linprocfs_statfs __P((struct mount *mp, struct statfs *sbp,
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struct proc *p));
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static int linprocfs_unmount __P((struct mount *mp, int mntflags,
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struct proc *p));
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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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static int
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linprocfs_mount(mp, path, data, ndp, p)
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struct mount *mp;
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char *path;
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caddr_t 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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int error;
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if (mp->mnt_flag & MNT_UPDATE)
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return (EOPNOTSUPP);
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if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(linprocfs_exit))) {
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printf("linprocfs: cannot register linprocfs_exit with at_exit\n");
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return(error);
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}
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mp->mnt_flag |= MNT_LOCAL;
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mp->mnt_data = 0;
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vfs_getnewfsid(mp);
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size = sizeof("linprocfs") - 1;
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bcopy("linprocfs", mp->mnt_stat.f_mntfromname, size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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(void)linprocfs_statfs(mp, &mp->mnt_stat, p);
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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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static int
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linprocfs_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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int flags = 0;
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if (mntflags & MNT_FORCE)
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flags |= FORCECLOSE;
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error = vflush(mp, 0, flags);
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if (error)
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return (error);
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if (mp->mnt_vfc->vfc_refcount == 1)
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rm_at_exit(linprocfs_exit);
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return (0);
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}
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int
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linprocfs_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 (linprocfs_allocvp(mp, vpp, 0, root_dir));
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}
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/*
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* Get file system statistics.
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*/
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static int
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linprocfs_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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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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sbp->f_type = mp->mnt_vfc->vfc_typenum;
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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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return (0);
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}
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static struct vfsops linprocfs_vfsops = {
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linprocfs_mount,
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vfs_stdstart,
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linprocfs_unmount,
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linprocfs_root,
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vfs_stdquotactl,
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linprocfs_statfs,
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vfs_stdsync,
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vfs_stdvget,
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vfs_stdfhtovp,
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vfs_stdcheckexp,
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vfs_stdvptofh,
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vfs_stdinit,
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};
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VFS_SET(linprocfs_vfsops, linprocfs, VFCF_SYNTHETIC);
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MODULE_DEPEND(linprocfs, linux, 1, 1, 1);
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MODULE_DEPEND(linprocfs, procfs, 1, 1, 1);
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