+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/* $NetBSD: mfs_vnops.c,v 1.5 1994/12/14 13:03:52 mycroft Exp $ */
-
-/*
- * Copyright (c) 1989, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * 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.
- *
- * @(#)mfs_vnops.c 8.5 (Berkeley) 7/28/94
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-#include <sys/proc.h>
-#include <sys/buf.h>
-#include <sys/map.h>
-#include <sys/vnode.h>
-#include <sys/malloc.h>
-
-#include <miscfs/specfs/specdev.h>
-
-#include <machine/vmparam.h>
-
-#include <ufs/mfs/mfsnode.h>
-#include <ufs/mfs/mfsiom.h>
-#include <ufs/mfs/mfs_extern.h>
-
-/*
- * mfs vnode operations.
- */
-
-#define VOPFUNC int (*)(void *)
-
-int (**mfs_vnodeop_p)(void *);
-struct vnodeopv_entry_desc mfs_vnodeop_entries[] = {
- { &vop_default_desc, (VOPFUNC)vn_default_error },
- { &vop_lookup_desc, (VOPFUNC)mfs_lookup }, /* lookup */
- { &vop_create_desc, (VOPFUNC)mfs_create }, /* create */
- { &vop_mknod_desc, (VOPFUNC)mfs_mknod }, /* mknod */
- { &vop_open_desc, (VOPFUNC)mfs_open }, /* open */
- { &vop_close_desc, (VOPFUNC)mfs_close }, /* close */
- { &vop_access_desc, (VOPFUNC)mfs_access }, /* access */
- { &vop_getattr_desc, (VOPFUNC)mfs_getattr }, /* getattr */
- { &vop_setattr_desc, (VOPFUNC)mfs_setattr }, /* setattr */
- { &vop_read_desc, (VOPFUNC)mfs_read }, /* read */
- { &vop_write_desc, (VOPFUNC)mfs_write }, /* write */
- { &vop_ioctl_desc, (VOPFUNC)mfs_ioctl }, /* ioctl */
- { &vop_select_desc, (VOPFUNC)mfs_select }, /* select */
- { &vop_mmap_desc, (VOPFUNC)mfs_mmap }, /* mmap */
- { &vop_fsync_desc, (VOPFUNC)spec_fsync }, /* fsync */
- { &vop_seek_desc, (VOPFUNC)mfs_seek }, /* seek */
- { &vop_remove_desc, (VOPFUNC)mfs_remove }, /* remove */
- { &vop_link_desc, (VOPFUNC)mfs_link }, /* link */
- { &vop_rename_desc, (VOPFUNC)mfs_rename }, /* rename */
- { &vop_mkdir_desc, (VOPFUNC)mfs_mkdir }, /* mkdir */
- { &vop_rmdir_desc, (VOPFUNC)mfs_rmdir }, /* rmdir */
- { &vop_symlink_desc, (VOPFUNC)mfs_symlink }, /* symlink */
- { &vop_readdir_desc, (VOPFUNC)mfs_readdir }, /* readdir */
- { &vop_readlink_desc, (VOPFUNC)mfs_readlink }, /* readlink */
- { &vop_abortop_desc, (VOPFUNC)mfs_abortop }, /* abortop */
- { &vop_inactive_desc, (VOPFUNC)mfs_inactive }, /* inactive */
- { &vop_reclaim_desc, (VOPFUNC)mfs_reclaim }, /* reclaim */
- { &vop_lock_desc, (VOPFUNC)mfs_lock }, /* lock */
- { &vop_unlock_desc, (VOPFUNC)mfs_unlock }, /* unlock */
- { &vop_bmap_desc, (VOPFUNC)mfs_bmap }, /* bmap */
- { &vop_strategy_desc, (VOPFUNC)mfs_strategy }, /* strategy */
- { &vop_print_desc, (VOPFUNC)mfs_print }, /* print */
- { &vop_islocked_desc, (VOPFUNC)mfs_islocked }, /* islocked */
- { &vop_pathconf_desc, (VOPFUNC)mfs_pathconf }, /* pathconf */
- { &vop_advlock_desc, (VOPFUNC)mfs_advlock }, /* advlock */
- { &vop_blkatoff_desc, (VOPFUNC)mfs_blkatoff }, /* blkatoff */
- { &vop_valloc_desc, (VOPFUNC)mfs_valloc }, /* valloc */
- { &vop_vfree_desc, (VOPFUNC)mfs_vfree }, /* vfree */
- { &vop_truncate_desc, (VOPFUNC)mfs_truncate }, /* truncate */
- { &vop_update_desc, (VOPFUNC)mfs_update }, /* update */
- { &vop_bwrite_desc, (VOPFUNC)mfs_bwrite }, /* bwrite */
- { &vop_pgrd_desc, (VOPFUNC)mfs_pgrg }, /* pager read */
- { &vop_pgwr_desc, (VOPFUNC)mfs_pgwr }, /* pager write */
- { (struct vnodeop_desc*)NULL, (int(*)())NULL }
-};
-struct vnodeopv_desc mfs_vnodeop_opv_desc =
- { &mfs_vnodeop_p, mfs_vnodeop_entries };
-
-/*
- * Vnode Operations.
- *
- * Open called to allow memory filesystem to initialize and
- * validate before actual IO. Record our process identifier
- * so we can tell when we are doing I/O to ourself.
- */
-/* ARGSUSED */
-int
-mfs_open(ap)
- struct vop_open_args /* {
- struct vnode *a_vp;
- int a_mode;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
-
- if (ap->a_vp->v_type != VBLK) {
- panic("mfs_ioctl not VBLK");
- /* NOTREACHED */
- }
- return (0);
-}
-
-/*
- * Ioctl operation.
- */
-/* ARGSUSED */
-int
-mfs_ioctl(ap)
- struct vop_ioctl_args /* {
- struct vnode *a_vp;
- u_long a_command;
- caddr_t a_data;
- int a_fflag;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
-
- return (ENOTTY);
-}
-
-/*
- * Pass I/O requests to the memory filesystem process.
- */
-int
-mfs_strategy(ap)
- struct vop_strategy_args /* {
- struct buf *a_bp;
- } */ *ap;
-{
- register struct buf *bp = ap->a_bp;
- register struct mfsnode *mfsp;
- struct vnode *vp;
- struct proc *p = curproc; /* XXX */
-
- if (!vfinddev(bp->b_dev, VBLK, &vp) || vp->v_usecount == 0)
- panic("mfs_strategy: bad dev");
- mfsp = VTOMFS(vp);
- /* check for mini-root access */
- if (mfsp->mfs_pid == 0) {
- caddr_t base;
-
- base = mfsp->mfs_baseoff + (bp->b_blkno << DEV_BSHIFT);
- if (bp->b_flags & B_READ)
- bcopy(base, bp->b_data, bp->b_bcount);
- else
- bcopy(bp->b_data, base, bp->b_bcount);
- biodone(bp);
- } else if (mfsp->mfs_pid == p->p_pid) {
- mfs_doio(bp, mfsp->mfs_baseoff);
- } else {
- bp->b_actf = mfsp->mfs_buflist;
- mfsp->mfs_buflist = bp;
- wakeup((caddr_t)vp);
- }
- return (0);
-}
-
-/*
- * Memory file system I/O.
- *
- * Trivial on the HP since buffer has already been mapping into KVA space.
- */
-void
-mfs_doio(bp, base)
- register struct buf *bp;
- caddr_t base;
-{
-
- base += (bp->b_blkno << DEV_BSHIFT);
- if (bp->b_flags & B_READ)
- bp->b_error = copyin(base, bp->b_data, bp->b_bcount);
- else
- bp->b_error = copyout(bp->b_data, base, bp->b_bcount);
- if (bp->b_error)
- bp->b_flags |= B_ERROR;
- biodone(bp);
-}
-
-/*
- * This is a noop, simply returning what one has been given.
- */
-int
-mfs_bmap(ap)
- struct vop_bmap_args /* {
- struct vnode *a_vp;
- daddr_t a_bn;
- struct vnode **a_vpp;
- daddr_t *a_bnp;
- int *a_runp;
- } */ *ap;
-{
-
- if (ap->a_vpp != NULL)
- *ap->a_vpp = ap->a_vp;
- if (ap->a_bnp != NULL)
- *ap->a_bnp = ap->a_bn;
- return (0);
-}
-
-/*
- * Memory filesystem close routine
- */
-/* ARGSUSED */
-int
-mfs_close(ap)
- struct vop_close_args /* {
- struct vnode *a_vp;
- int a_fflag;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
- register struct vnode *vp = ap->a_vp;
- register struct mfsnode *mfsp = VTOMFS(vp);
- register struct buf *bp;
- int error;
-
- /*
- * Finish any pending I/O requests.
- */
- while (bp = mfsp->mfs_buflist) {
- mfsp->mfs_buflist = bp->b_actf;
- mfs_doio(bp, mfsp->mfs_baseoff);
- wakeup((caddr_t)bp);
- }
- /*
- * On last close of a memory filesystem
- * we must invalidate any in core blocks, so that
- * we can, free up its vnode.
- */
- if (error = vinvalbuf(vp, 1, ap->a_cred, ap->a_p, 0, 0))
- return (error);
- /*
- * There should be no way to have any more uses of this
- * vnode, so if we find any other uses, it is a panic.
- */
- if (vp->v_usecount > 1)
- printf("mfs_close: ref count %d > 1\n", vp->v_usecount);
- if (vp->v_usecount > 1 || mfsp->mfs_buflist)
- panic("mfs_close");
- /*
- * Send a request to the filesystem server to exit.
- */
- mfsp->mfs_buflist = (struct buf *)(-1);
- wakeup((caddr_t)vp);
- return (0);
-}
-
-/*
- * Memory filesystem inactive routine
- */
-/* ARGSUSED */
-int
-mfs_inactive(ap)
- struct vop_inactive_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
- register struct mfsnode *mfsp = VTOMFS(ap->a_vp);
-
- if (mfsp->mfs_buflist && mfsp->mfs_buflist != (struct buf *)(-1))
- panic("mfs_inactive: not inactive (mfs_buflist %x)",
- mfsp->mfs_buflist);
- return (0);
-}
-
-/*
- * Reclaim a memory filesystem devvp so that it can be reused.
- */
-int
-mfs_reclaim(ap)
- struct vop_reclaim_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
- register struct vnode *vp = ap->a_vp;
-
- FREE(vp->v_data, M_MFSNODE);
- vp->v_data = NULL;
- return (0);
-}
-
-/*
- * Print out the contents of an mfsnode.
- */
-int
-mfs_print(ap)
- struct vop_print_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
- register struct mfsnode *mfsp = VTOMFS(ap->a_vp);
-
- printf("tag VT_MFS, pid %d, base %d, size %d\n", mfsp->mfs_pid,
- mfsp->mfs_baseoff, mfsp->mfs_size);
- return (0);
-}
-
-/*
- * Block device bad operation
- */
-int
-mfs_badop()
-{
-
- panic("mfs_badop called\n");
- /* NOTREACHED */
-}
-
-/*
- * Memory based filesystem initialization.
- */
-mfs_init()
-{
-
-}
projects / apple / xnu.git / blobdiff