783 lines
21 KiB
C
783 lines
21 KiB
C
/* $NetBSD: msdosfs_vfsops.c,v 1.31 1995/07/24 06:38:22 leo Exp $ */
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/*-
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* Copyright (C) 1994 Wolfgang Solfrank.
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* Copyright (C) 1994 TooLs GmbH.
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* All rights reserved.
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* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Written by Paul Popelka (paulp@uts.amdahl.com)
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*
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* You can do anything you want with this software, just don't say you wrote
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* it, and don't remove this notice.
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*
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* This software is provided "as is".
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*
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* The author supplies this software to be publicly redistributed on the
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* understanding that the author is not responsible for the correct
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* functioning of this software in any circumstances and is not liable for
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* any damages caused by this software.
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*
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* October 1992
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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/namei.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/vnode.h>
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#include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/file.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <msdosfs/bpb.h>
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#include <msdosfs/bootsect.h>
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#include <msdosfs/direntry.h>
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#include <msdosfs/denode.h>
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#include <msdosfs/msdosfsmount.h>
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#include <msdosfs/fat.h>
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/*
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* mp - path - addr in user space of mount point (ie /usr or whatever)
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* data - addr in user space of mount params including the name of the block
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* special file to treat as a filesystem.
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*/
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int
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msdosfs_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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struct vnode *devvp; /* vnode for blk device to mount */
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struct msdosfs_args args; /* will hold data from mount request */
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struct msdosfsmount *pmp; /* msdosfs specific mount control block */
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size_t size;
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int error, flags;
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mode_t accessmode;
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if (error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args)))
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return (error);
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/*
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* If updating, check whether changing from read-only to
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* read/write; if there is no device name, that's all we do.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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pmp = VFSTOMSDOSFS(mp);
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error = 0;
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if (pmp->pm_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
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flags = WRITECLOSE;
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if (mp->mnt_flag & MNT_FORCE)
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flags |= FORCECLOSE;
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if (vfs_busy(mp))
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return (EBUSY);
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error = vflush(mp, NULLVP, flags);
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vfs_unbusy(mp);
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}
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if (!error && (mp->mnt_flag & MNT_RELOAD))
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/* not yet implemented */
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error = EOPNOTSUPP;
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if (error)
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return (error);
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if (pmp->pm_ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
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/*
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* If upgrade to read-write by non-root, then verify
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* that user has necessary permissions on the device.
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*/
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if (p->p_ucred->cr_uid != 0) {
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devvp = pmp->pm_devvp;
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VOP_LOCK(devvp);
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if (error = VOP_ACCESS(devvp, VREAD | VWRITE,
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p->p_ucred, p)) {
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VOP_UNLOCK(devvp);
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return (error);
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}
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VOP_UNLOCK(devvp);
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}
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pmp->pm_ronly = 0;
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}
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if (args.fspec == 0) {
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/*
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* Process export requests.
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*/
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return (vfs_export(mp, &pmp->pm_export, &args.export));
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}
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}
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/*
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* Not an update, or updating the name: look up the name
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* and verify that it refers to a sensible block device.
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*/
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
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if (error = namei(ndp))
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return (error);
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devvp = ndp->ni_vp;
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if (devvp->v_type != VBLK) {
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vrele(devvp);
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return (ENOTBLK);
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}
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if (major(devvp->v_rdev) >= nblkdev) {
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vrele(devvp);
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return (ENXIO);
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}
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/*
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* If mount by non-root, then verify that user has necessary
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* permissions on the device.
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*/
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if (p->p_ucred->cr_uid != 0) {
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accessmode = VREAD;
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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accessmode |= VWRITE;
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VOP_LOCK(devvp);
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if (error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p)) {
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vput(devvp);
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return (error);
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}
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VOP_UNLOCK(devvp);
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}
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if ((mp->mnt_flag & MNT_UPDATE) == 0)
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error = msdosfs_mountfs(devvp, mp, p);
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else {
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if (devvp != pmp->pm_devvp)
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error = EINVAL; /* needs translation */
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else
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vrele(devvp);
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}
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if (error) {
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vrele(devvp);
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return (error);
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}
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pmp = VFSTOMSDOSFS(mp);
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pmp->pm_gid = args.gid;
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pmp->pm_uid = args.uid;
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pmp->pm_mask = args.mask;
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(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
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(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
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&size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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#ifdef MSDOSFS_DEBUG
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printf("msdosfs_mount(): mp %x, pmp %x, inusemap %x\n", mp, pmp, pmp->pm_inusemap);
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#endif
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return (0);
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}
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int
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msdosfs_mountfs(devvp, mp, p)
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struct vnode *devvp;
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struct mount *mp;
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struct proc *p;
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{
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struct msdosfsmount *pmp;
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struct buf *bp;
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dev_t dev = devvp->v_rdev;
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struct partinfo dpart;
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union bootsector *bsp;
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struct byte_bpb33 *b33;
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struct byte_bpb50 *b50;
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extern struct vnode *rootvp;
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int ronly, error;
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#ifdef atari
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int bsize, dtype, tmp;
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#else /* !atari */
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int size, bpc, bit, i;
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#endif /* !atari */
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/*
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* Disallow multiple mounts of the same device.
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* Disallow mounting of a device that is currently in use
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* (except for root, which might share swap device for miniroot).
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* Flush out any old buffers remaining from a previous use.
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*/
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if (error = vfs_mountedon(devvp))
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return (error);
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if (vcount(devvp) > 1 && devvp != rootvp)
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return (EBUSY);
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if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0))
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return (error);
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ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p))
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return (error);
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#ifdef atari
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bp = NULL; /* both used in error_exit */
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pmp = NULL;
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/*
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* We need the disklabel to calculate the size of a FAT entry later on.
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* Also make sure the partition contains a filesystem of type FS_MSDOS.
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* This doesn't work for floppies, so we have to check for them too.
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*
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* At least some parts of the msdos fs driver seem to assume that the
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* size of a disk block will always be 512 bytes. Let's check it...
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*/
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if (error = VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p))
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goto error_exit;
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tmp = dpart.part->p_fstype;
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dtype = dpart.disklab->d_type;
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bsize = dpart.disklab->d_secsize;
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if (bsize != 512 || (dtype != DTYPE_FLOPPY && tmp != FS_MSDOS)) {
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error = EINVAL;
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goto error_exit;
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}
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#else /* !atari */
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if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
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size = DEV_BSIZE;
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else
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size = dpart.disklab->d_secsize;
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/*
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* Read the boot sector of the filesystem, and then check the boot
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* signature. If not a dos boot sector then error out. We could
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* also add some checking on the bsOemName field. So far I've seen
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* the following values: "IBM 3.3" "MSDOS3.3" "MSDOS5.0"
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*/
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bp = NULL;
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pmp = NULL;
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#endif /* !atari */
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if (error = bread(devvp, 0, 512, NOCRED, &bp))
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goto error_exit;
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bp->b_flags |= B_AGE;
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bsp = (union bootsector *)bp->b_data;
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b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
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b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
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#ifdef MSDOSFS_CHECKSIG
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if (bsp->bs50.bsBootSectSig != BOOTSIG) {
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error = EINVAL;
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goto error_exit;
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}
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#endif
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pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK);
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bzero((caddr_t)pmp, sizeof *pmp);
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pmp->pm_mountp = mp;
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/*
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* Compute several useful quantities from the bpb in the
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* bootsector. Copy in the dos 5 variant of the bpb then fix up
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* the fields that are different between dos 5 and dos 3.3.
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*/
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pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
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pmp->pm_SectPerClust = b50->bpbSecPerClust;
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pmp->pm_ResSectors = getushort(b50->bpbResSectors);
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pmp->pm_FATs = b50->bpbFATs;
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pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
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pmp->pm_Sectors = getushort(b50->bpbSectors);
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pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
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#ifdef atari
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/*
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* Meaningless on a gemdos fs. This kind of information
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* should be extracted from the disklabel structure.
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*/
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pmp->pm_SecPerTrack = 1; /* anything between 1 and 63 */
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pmp->pm_Heads = 1; /* anything between 1 and 255 */
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pmp->pm_Media = 0; /* unused, any value will do */
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#else /* !atari */
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pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
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pmp->pm_Heads = getushort(b50->bpbHeads);
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pmp->pm_Media = b50->bpbMedia;
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/* XXX - We should probably check more values here */
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if (!pmp->pm_BytesPerSec || !pmp->pm_SectPerClust ||
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pmp->pm_Heads > 255 || pmp->pm_SecPerTrack > 63) {
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error = EINVAL;
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goto error_exit;
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}
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#endif /* !atari */
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if (pmp->pm_Sectors == 0) {
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pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
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pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
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} else {
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pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
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pmp->pm_HugeSectors = pmp->pm_Sectors;
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}
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#ifdef atari
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/*
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* Check a few values (could do some more):
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* - logical sector size: power of 2, >= block size
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* - sectors per cluster: power of 2, >= 1
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* - number of sectors: >= 1, <= size of partition
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*/
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if ( pmp->pm_BytesPerSec < bsize
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|| pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1)
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|| !pmp->pm_SectPerClust
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|| pmp->pm_SectPerClust & (pmp->pm_SectPerClust - 1)
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|| !pmp->pm_HugeSectors
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|| pmp->pm_HugeSectors * pmp->pm_BytesPerSec
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> dpart.part->p_size * bsize) {
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error = EINVAL;
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goto error_exit;
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}
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/*
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* XXX - Many parts of the msdos fs driver seem to assume that
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* the number of bytes per logical sector (BytesPerSec) will
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* always be the same as the number of bytes per disk block
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* Let's pretend it is.
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*/
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tmp = pmp->pm_BytesPerSec / bsize;
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pmp->pm_BytesPerSec = bsize;
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pmp->pm_SectPerClust *= tmp;
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pmp->pm_HugeSectors *= tmp;
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pmp->pm_HiddenSects *= tmp;
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pmp->pm_ResSectors *= tmp;
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pmp->pm_Sectors *= tmp;
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pmp->pm_FATsecs *= tmp;
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#endif /* atari */
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pmp->pm_fatblk = pmp->pm_ResSectors;
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pmp->pm_rootdirblk = pmp->pm_fatblk +
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(pmp->pm_FATs * pmp->pm_FATsecs);
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#ifdef atari
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tmp = pmp->pm_RootDirEnts * sizeof(struct direntry);
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tmp += pmp->pm_BytesPerSec - 1;
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tmp /= pmp->pm_BytesPerSec;
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pmp->pm_rootdirsize = tmp; /* in sectors */
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#else /* !atari */
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pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry))
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/
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pmp->pm_BytesPerSec;/* in sectors */
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#endif /* !atari */
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pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
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pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
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pmp->pm_SectPerClust;
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pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1;
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pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec;
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#ifdef atari
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if (dtype == DTYPE_FLOPPY) {
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pmp->pm_fatentrysize = 12;
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pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
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} else {
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pmp->pm_fatentrysize = 16;
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pmp->pm_fatblocksize = MAXBSIZE;
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}
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#else /* !atari */
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if (FAT12(pmp))
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/*
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* This will usually be a floppy disk. This size makes sure
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* that one fat entry will not be split across multiple
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* blocks.
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*/
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pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
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else
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/*
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* This will usually be a hard disk. Reading or writing one
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* block should be quite fast.
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*/
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pmp->pm_fatblocksize = MAXBSIZE;
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#endif /* !atari */
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pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec;
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#ifdef atari
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/*
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* The following check will almost always fail for a gemdos fs.
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* The root directory is kept as a number of logical sectors,
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* not as a number of clusters. The driver assumes it can
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* handle the root directory like any other directory. It
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* might be a lot of work to fix this. Let's ignore it.
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*/
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#else /* !atari */
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if ((pmp->pm_rootdirsize % pmp->pm_SectPerClust) != 0)
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printf("mountmsdosfs(): root directory is not a multiple of the clustersize in length\n");
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#endif /* !atari */
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#ifdef atari
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/*
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* Be prepared for block size != 512
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*/
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pmp->pm_brbomask = bsize - 1;
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for (tmp = 0; bsize >>= 1; ++tmp)
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;
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pmp->pm_bnshift = tmp;
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/*
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* Compute mask and shift value for isolating cluster relative
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* byte offsets and cluster numbers from a file offset. We
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* already know that the number of sectors per cluster is
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* > 0 and a power of 2.
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*/
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bsize = pmp->pm_SectPerClust * pmp->pm_BytesPerSec;
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pmp->pm_depclust = bsize / sizeof(struct direntry);
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pmp->pm_crbomask = bsize - 1;
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pmp->pm_bpcluster = bsize;
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for (tmp = 0; bsize >>= 1; ++tmp)
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;
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pmp->pm_cnshift = tmp;
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#else /* !atari */
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/*
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* Compute mask and shift value for isolating cluster relative byte
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* offsets and cluster numbers from a file offset.
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*/
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bpc = pmp->pm_SectPerClust * pmp->pm_BytesPerSec;
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pmp->pm_bpcluster = bpc;
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pmp->pm_depclust = bpc / sizeof(struct direntry);
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pmp->pm_crbomask = bpc - 1;
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if (bpc == 0) {
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error = EINVAL;
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goto error_exit;
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}
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bit = 1;
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for (i = 0; i < 32; i++) {
|
|
if (bit & bpc) {
|
|
if (bit ^ bpc) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
pmp->pm_cnshift = i;
|
|
break;
|
|
}
|
|
bit <<= 1;
|
|
}
|
|
|
|
pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */
|
|
pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */
|
|
#endif /* !atari */
|
|
|
|
/*
|
|
* Release the bootsector buffer.
|
|
*/
|
|
brelse(bp);
|
|
bp = NULL;
|
|
|
|
/*
|
|
* Allocate memory for the bitmap of allocated clusters, and then
|
|
* fill it in.
|
|
*/
|
|
pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
|
|
/ N_INUSEBITS)
|
|
* sizeof(*pmp->pm_inusemap),
|
|
M_MSDOSFSFAT, M_WAITOK);
|
|
|
|
/*
|
|
* fillinusemap() needs pm_devvp.
|
|
*/
|
|
pmp->pm_dev = dev;
|
|
pmp->pm_devvp = devvp;
|
|
|
|
/*
|
|
* Have the inuse map filled in.
|
|
*/
|
|
if (error = fillinusemap(pmp))
|
|
goto error_exit;
|
|
|
|
/*
|
|
* If they want fat updates to be synchronous then let them suffer
|
|
* the performance degradation in exchange for the on disk copy of
|
|
* the fat being correct just about all the time. I suppose this
|
|
* would be a good thing to turn on if the kernel is still flakey.
|
|
*/
|
|
pmp->pm_waitonfat = mp->mnt_flag & MNT_SYNCHRONOUS;
|
|
|
|
/*
|
|
* Finish up.
|
|
*/
|
|
pmp->pm_ronly = ronly;
|
|
if (ronly == 0)
|
|
pmp->pm_fmod = 1;
|
|
mp->mnt_data = (qaddr_t)pmp;
|
|
mp->mnt_stat.f_fsid.val[0] = (long)dev;
|
|
mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_MSDOS);
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
#ifdef QUOTA
|
|
/*
|
|
* If we ever do quotas for DOS filesystems this would be a place
|
|
* to fill in the info in the msdosfsmount structure. You dolt,
|
|
* quotas on dos filesystems make no sense because files have no
|
|
* owners on dos filesystems. of course there is some empty space
|
|
* in the directory entry where we could put uid's and gid's.
|
|
*/
|
|
#endif
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
|
|
return (0);
|
|
|
|
error_exit:;
|
|
if (bp)
|
|
brelse(bp);
|
|
(void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
|
|
if (pmp) {
|
|
if (pmp->pm_inusemap)
|
|
free(pmp->pm_inusemap, M_MSDOSFSFAT);
|
|
free(pmp, M_MSDOSFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
msdosfs_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Unmount the filesystem described by mp.
|
|
*/
|
|
int
|
|
msdosfs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
struct msdosfsmount *pmp;
|
|
int error, flags;
|
|
|
|
flags = 0;
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
#ifdef QUOTA
|
|
#endif
|
|
if (error = vflush(mp, NULLVP, flags))
|
|
return (error);
|
|
pmp = VFSTOMSDOSFS(mp);
|
|
pmp->pm_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
|
|
printf("flag %08x, usecount %d, writecount %d, holdcnt %d\n",
|
|
vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt);
|
|
printf("lastr %d, id %d, mount %08x, op %08x\n",
|
|
vp->v_lastr, vp->v_id, vp->v_mount, vp->v_op);
|
|
printf("freef %08x, freeb %08x, mountf %08x, mountb %08x\n",
|
|
vp->v_freef, vp->v_freeb, vp->v_mountf, vp->v_mountb);
|
|
printf("cleanblkhd %08x, dirtyblkhd %08x, numoutput %d, type %d\n",
|
|
vp->v_cleanblkhd, vp->v_dirtyblkhd, vp->v_numoutput, vp->v_type);
|
|
printf("union %08x, tag %d, data[0] %08x, data[1] %08x\n",
|
|
vp->v_socket, vp->v_tag, vp->v_data[0], vp->v_data[1]);
|
|
#endif
|
|
error = VOP_CLOSE(pmp->pm_devvp, pmp->pm_ronly ? FREAD : FREAD|FWRITE,
|
|
NOCRED, p);
|
|
vrele(pmp->pm_devvp);
|
|
free(pmp->pm_inusemap, M_MSDOSFSFAT);
|
|
free(pmp, M_MSDOSFSMNT);
|
|
mp->mnt_data = (qaddr_t)0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
msdosfs_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
|
|
struct denode *ndep;
|
|
int error;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_root(); mp %08x, pmp %08x, ndep %08x, vp %08x\n",
|
|
mp, pmp, ndep, DETOV(ndep));
|
|
#endif
|
|
if (error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, NULL, &ndep))
|
|
return (error);
|
|
*vpp = DETOV(ndep);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
msdosfs_quotactl(mp, cmds, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmds;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
|
|
#ifdef QUOTA
|
|
return (EOPNOTSUPP);
|
|
#else
|
|
return (EOPNOTSUPP);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
msdosfs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
struct msdosfsmount *pmp;
|
|
|
|
pmp = VFSTOMSDOSFS(mp);
|
|
#ifdef COMPAT_09
|
|
sbp->f_type = 4;
|
|
#else
|
|
sbp->f_type = 0;
|
|
#endif
|
|
sbp->f_bsize = pmp->pm_bpcluster;
|
|
sbp->f_iosize = pmp->pm_bpcluster;
|
|
sbp->f_blocks = pmp->pm_nmbrofclusters;
|
|
sbp->f_bfree = pmp->pm_freeclustercount;
|
|
sbp->f_bavail = pmp->pm_freeclustercount;
|
|
sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
|
|
sbp->f_ffree = 0; /* what to put in here? */
|
|
if (sbp != &mp->mnt_stat) {
|
|
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);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
msdosfs_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
struct denode *dep;
|
|
struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
|
|
int error, allerror = 0;
|
|
|
|
/*
|
|
* If we ever switch to not updating all of the fats all the time,
|
|
* this would be the place to update them from the first one.
|
|
*/
|
|
if (pmp->pm_fmod != 0)
|
|
if (pmp->pm_ronly != 0)
|
|
panic("msdosfs_sync: rofs mod");
|
|
else {
|
|
/* update fats here */
|
|
}
|
|
/*
|
|
* Write back each (modified) denode.
|
|
*/
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first;
|
|
vp != NULL;
|
|
vp = vp->v_mntvnodes.le_next) {
|
|
/*
|
|
* If the vnode that we are about to sync is no longer
|
|
* assoicated with this mount point, start over.
|
|
*/
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
if (VOP_ISLOCKED(vp))
|
|
continue;
|
|
dep = VTODE(vp);
|
|
if ((dep->de_flag & DE_UPDATE) == 0 &&
|
|
vp->v_dirtyblkhd.lh_first == NULL)
|
|
continue;
|
|
if (vget(vp, 1))
|
|
goto loop;
|
|
if (error = VOP_FSYNC(vp, cred, waitfor, p))
|
|
allerror = error;
|
|
vput(vp);
|
|
}
|
|
/*
|
|
* Force stale file system control information to be flushed.
|
|
*/
|
|
if (error = VOP_FSYNC(pmp->pm_devvp, cred, waitfor, p))
|
|
allerror = error;
|
|
#ifdef QUOTA
|
|
#endif
|
|
return (allerror);
|
|
}
|
|
|
|
int
|
|
msdosfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
|
|
struct defid *defhp = (struct defid *) fhp;
|
|
struct denode *dep;
|
|
struct netcred *np;
|
|
int error;
|
|
|
|
np = vfs_export_lookup(mp, &pmp->pm_export, nam);
|
|
if (np == NULL)
|
|
return (EACCES);
|
|
error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs,
|
|
NULL, &dep);
|
|
if (error) {
|
|
*vpp = NULLVP;
|
|
return (error);
|
|
}
|
|
*vpp = DETOV(dep);
|
|
*exflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
msdosfs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
struct denode *dep;
|
|
struct defid *defhp;
|
|
|
|
dep = VTODE(vp);
|
|
defhp = (struct defid *)fhp;
|
|
defhp->defid_len = sizeof(struct defid);
|
|
defhp->defid_dirclust = dep->de_dirclust;
|
|
defhp->defid_dirofs = dep->de_diroffset;
|
|
/* defhp->defid_gen = dep->de_gen; */
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
msdosfs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
struct vfsops msdosfs_vfsops = {
|
|
MOUNT_MSDOS,
|
|
msdosfs_mount,
|
|
msdosfs_start,
|
|
msdosfs_unmount,
|
|
msdosfs_root,
|
|
msdosfs_quotactl,
|
|
msdosfs_statfs,
|
|
msdosfs_sync,
|
|
msdosfs_vget,
|
|
msdosfs_fhtovp,
|
|
msdosfs_vptofh,
|
|
msdosfs_init
|
|
};
|