/* * 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: 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() { }