+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/* $NetBSD: kernfs_vfsops.c,v 1.23 1995/03/09 12:05:52 mycroft Exp $ */
-
-/*
- * Copyright (c) 1992, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software donated 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.
- *
- * @(#)kernfs_vfsops.c 8.5 (Berkeley) 6/15/94
- */
-
-/*
- * Kernel params Filesystem
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/types.h>
-#include <sys/proc.h>
-#include <sys/vnode.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
-#include <sys/malloc.h>
-
-#include <miscfs/specfs/specdev.h>
-#include <miscfs/kernfs/kernfs.h>
-
-dev_t rrootdev = NODEV;
-
-kernfs_init()
-{
-
-}
-
-void
-kernfs_get_rrootdev()
-{
- static int tried = 0;
- int cmaj;
-
- if (tried) {
- /* Already did it once. */
- return;
- }
- tried = 1;
-
- if (rootdev == NODEV)
- return;
- for (cmaj = 0; cmaj < nchrdev; cmaj++) {
- rrootdev = makedev(cmaj, minor(rootdev));
- if (chrtoblk(rrootdev) == rootdev)
- return;
- }
- rrootdev = NODEV;
- printf("kernfs_get_rrootdev: no raw root device\n");
-}
-
-/*
- * Mount the Kernel params filesystem
- */
-kernfs_mount(mp, path, data, ndp, p)
- struct mount *mp;
- char *path;
- caddr_t data;
- struct nameidata *ndp;
- struct proc *p;
-{
- int error = 0;
- size_t size;
- struct kernfs_mount *fmp;
- struct vnode *rvp;
-
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_mount(mp = %x)\n", mp);
-#endif
-
- /*
- * Update is a no-op
- */
- if (mp->mnt_flag & MNT_UPDATE)
- return (EOPNOTSUPP);
-
- MALLOC(fmp, struct kernfs_mount *, sizeof(struct kernfs_mount),
- M_MISCFSMNT, M_WAITOK);
- if (error = getnewvnode(VT_KERNFS, mp, kernfs_vnodeop_p, &rvp)) {
- FREE(fmp, M_MISCFSMNT);
- return (error);
- }
-
- rvp->v_type = VDIR;
- rvp->v_flag |= VROOT;
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_mount: root vp = %x\n", rvp);
-#endif
- fmp->kf_root = rvp;
- mp->mnt_flag |= MNT_LOCAL;
- mp->mnt_data = (qaddr_t)fmp;
- getnewfsid(mp, makefstype(MOUNT_KERNFS));
-
- (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
- bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
- bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
- bcopy("kernfs", mp->mnt_stat.f_mntfromname, sizeof("kernfs"));
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_mount: at %s\n", mp->mnt_stat.f_mntonname);
-#endif
-
- kernfs_get_rrootdev();
- return (0);
-}
-
-kernfs_start(mp, flags, p)
- struct mount *mp;
- int flags;
- struct proc *p;
-{
-
- return (0);
-}
-
-kernfs_unmount(mp, mntflags, p)
- struct mount *mp;
- int mntflags;
- struct proc *p;
-{
- int error;
- int flags = 0;
- extern int doforce;
- struct vnode *rootvp = VFSTOKERNFS(mp)->kf_root;
-
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_unmount(mp = %x)\n", mp);
-#endif
-
- if (mntflags & MNT_FORCE) {
- /* kernfs can never be rootfs so don't check for it */
- if (!doforce)
- return (EINVAL);
- flags |= FORCECLOSE;
- }
-
- /*
- * Clear out buffer cache. I don't think we
- * ever get anything cached at this level at the
- * moment, but who knows...
- */
- if (rootvp->v_usecount > 1)
- return (EBUSY);
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_unmount: calling vflush\n");
-#endif
- if (error = vflush(mp, rootvp, flags))
- return (error);
-
-#ifdef KERNFS_DIAGNOSTIC
- vprint("kernfs root", rootvp);
-#endif
- /*
- * Clean out the old root vnode for reuse.
- */
- vrele(rootvp);
- vgone(rootvp);
- /*
- * Finally, throw away the kernfs_mount structure
- */
- free(mp->mnt_data, M_MISCFSMNT);
- mp->mnt_data = 0;
- return (0);
-}
-
-kernfs_root(mp, vpp)
- struct mount *mp;
- struct vnode **vpp;
-{
- struct vnode *vp;
-
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_root(mp = %x)\n", mp);
-#endif
-
- /*
- * Return locked reference to root.
- */
- vp = VFSTOKERNFS(mp)->kf_root;
- VREF(vp);
- VOP_LOCK(vp);
- *vpp = vp;
- return (0);
-}
-
-kernfs_quotactl(mp, cmd, uid, arg, p)
- struct mount *mp;
- int cmd;
- uid_t uid;
- caddr_t arg;
- struct proc *p;
-{
-
- return (EOPNOTSUPP);
-}
-
-kernfs_statfs(mp, sbp, p)
- struct mount *mp;
- struct statfs *sbp;
- struct proc *p;
-{
-
-#ifdef KERNFS_DIAGNOSTIC
- printf("kernfs_statfs(mp = %x)\n", mp);
-#endif
-
-#ifdef COMPAT_09
- sbp->f_type = 7;
-#else
- sbp->f_type = 0;
-#endif
- sbp->f_bsize = DEV_BSIZE;
- sbp->f_iosize = DEV_BSIZE;
- sbp->f_blocks = 2; /* 1K to keep df happy */
- sbp->f_bfree = 0;
- sbp->f_bavail = 0;
- sbp->f_files = 0;
- sbp->f_ffree = 0;
- if (sbp != &mp->mnt_stat) {
- 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);
- }
- strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
- sbp->f_fstypename[MFSNAMELEN] = '\0';
- return (0);
-}
-
-kernfs_sync(mp, waitfor)
- struct mount *mp;
- int waitfor;
-{
-
- return (0);
-}
-
-/*
- * Kernfs flat namespace lookup.
- * Currently unsupported.
- */
-kernfs_vget(mp, ino, vpp)
- struct mount *mp;
- ino_t ino;
- struct vnode **vpp;
-{
-
- return (EOPNOTSUPP);
-}
-
-
-kernfs_fhtovp(mp, fhp, setgen, vpp)
- struct mount *mp;
- struct fid *fhp;
- int setgen;
- struct vnode **vpp;
-{
-
- return (EOPNOTSUPP);
-}
-
-kernfs_vptofh(vp, fhp)
- struct vnode *vp;
- struct fid *fhp;
-{
-
- return (EOPNOTSUPP);
-}
-
-struct vfsops kernfs_vfsops = {
- MOUNT_KERNFS,
- kernfs_mount,
- kernfs_start,
- kernfs_unmount,
- kernfs_root,
- kernfs_quotactl,
- kernfs_statfs,
- kernfs_sync,
- kernfs_vget,
- kernfs_fhtovp,
- kernfs_vptofh,
- kernfs_init,
-};
projects / apple / xnu.git / blobdiff