diff --git a/sys/fs/msdosfs/msdosfs_vfsops.c b/sys/fs/msdosfs/msdosfs_vfsops.c
index 258c701bd300..adcffe45df82 100644
--- a/sys/fs/msdosfs/msdosfs_vfsops.c
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c
@@ -1,1207 +1,1209 @@
 /*	$NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $	*/
 
 /*-
  * SPDX-License-Identifier: BSD-4-Clause
  *
  * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
  * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
  * All rights reserved.
  * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
  *
  * 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 TooLs GmbH.
  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
  */
 /*-
  * Written by Paul Popelka (paulp@uts.amdahl.com)
  *
  * You can do anything you want with this software, just don't say you wrote
  * it, and don't remove this notice.
  *
  * This software is provided "as is".
  *
  * The author supplies this software to be publicly redistributed on the
  * understanding that the author is not responsible for the correct
  * functioning of this software in any circumstances and is not liable for
  * any damages caused by this software.
  *
  * October 1992
  */
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/buf.h>
 #include <sys/bufobj.h>
 #include <sys/conf.h>
 #include <sys/fcntl.h>
 #include <sys/iconv.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
 #include <sys/mount.h>
 #include <sys/mutex.h>
 #include <sys/namei.h>
 #include <sys/priv.h>
 #include <sys/proc.h>
 #include <sys/rwlock.h>
 #include <sys/stat.h>
 #include <sys/taskqueue.h>
 #include <sys/vnode.h>
 
 #include <geom/geom.h>
 #include <geom/geom_vfs.h>
 
 #include <fs/msdosfs/bootsect.h>
 #include <fs/msdosfs/bpb.h>
 #include <fs/msdosfs/direntry.h>
 #include <fs/msdosfs/denode.h>
 #include <fs/msdosfs/fat.h>
 #include <fs/msdosfs/msdosfsmount.h>
 
 #ifdef MSDOSFS_DEBUG
 #include <sys/rwlock.h>
 #endif
 
 static const char msdosfs_lock_msg[] = "fatlk";
 
 /* Mount options that we support. */
 static const char *msdosfs_opts[] = {
 	"async", "noatime", "noclusterr", "noclusterw",
 	"export", "force", "from", "sync",
 	"cs_dos", "cs_local", "cs_win", "dirmask",
 	"gid", "kiconv", "longname",
 	"longnames", "mask", "shortname", "shortnames",
 	"uid", "win95", "nowin95",
 	NULL
 };
 
 #if 1 /*def PC98*/
 /*
  * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
  *       garbage or a random value :-{
  *       If you want to use that broken-signatured media, define the
  *       following symbol even though PC/AT.
  *       (ex. mount PC-98 DOS formatted FD on PC/AT)
  */
 #define	MSDOSFS_NOCHECKSIG
 #endif
 
 MALLOC_DEFINE(M_MSDOSFSMNT, "msdosfs_mount", "MSDOSFS mount structure");
 static MALLOC_DEFINE(M_MSDOSFSFAT, "msdosfs_fat", "MSDOSFS file allocation table");
 
 struct iconv_functions *msdosfs_iconv;
 
 static int	update_mp(struct mount *mp, struct thread *td);
 static int	mountmsdosfs(struct vnode *devvp, struct mount *mp);
 static void	msdosfs_remount_ro(void *arg, int pending);
 static vfs_fhtovp_t	msdosfs_fhtovp;
 static vfs_mount_t	msdosfs_mount;
 static vfs_root_t	msdosfs_root;
 static vfs_statfs_t	msdosfs_statfs;
 static vfs_sync_t	msdosfs_sync;
 static vfs_unmount_t	msdosfs_unmount;
 
 /* Maximum length of a character set name (arbitrary). */
 #define	MAXCSLEN	64
 
 static int
 update_mp(struct mount *mp, struct thread *td)
 {
 	struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
 	void *dos, *win, *local;
 	int error, v;
 
 	if (!vfs_getopt(mp->mnt_optnew, "kiconv", NULL, NULL)) {
 		if (msdosfs_iconv != NULL) {
 			error = vfs_getopt(mp->mnt_optnew,
 			    "cs_win", &win, NULL);
 			if (!error)
 				error = vfs_getopt(mp->mnt_optnew,
 				    "cs_local", &local, NULL);
 			if (!error)
 				error = vfs_getopt(mp->mnt_optnew,
 				    "cs_dos", &dos, NULL);
 			if (!error) {
 				msdosfs_iconv->open(win, local, &pmp->pm_u2w);
 				msdosfs_iconv->open(local, win, &pmp->pm_w2u);
 				msdosfs_iconv->open(dos, local, &pmp->pm_u2d);
 				msdosfs_iconv->open(local, dos, &pmp->pm_d2u);
 			}
 			if (error != 0)
 				return (error);
 		} else {
 			pmp->pm_w2u = NULL;
 			pmp->pm_u2w = NULL;
 			pmp->pm_d2u = NULL;
 			pmp->pm_u2d = NULL;
 		}
 	}
 
 	if (vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v) == 1)
 		pmp->pm_gid = v;
 	if (vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v) == 1)
 		pmp->pm_uid = v;
 	if (vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v) == 1)
 		pmp->pm_mask = v & ALLPERMS;
 	if (vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v) == 1)
 		pmp->pm_dirmask = v & ALLPERMS;
 	vfs_flagopt(mp->mnt_optnew, "shortname",
 	    &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
 	vfs_flagopt(mp->mnt_optnew, "shortnames",
 	    &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
 	vfs_flagopt(mp->mnt_optnew, "longname",
 	    &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
 	vfs_flagopt(mp->mnt_optnew, "longnames",
 	    &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
 	vfs_flagopt(mp->mnt_optnew, "kiconv",
 	    &pmp->pm_flags, MSDOSFSMNT_KICONV);
 
 	if (vfs_getopt(mp->mnt_optnew, "nowin95", NULL, NULL) == 0)
 		pmp->pm_flags |= MSDOSFSMNT_NOWIN95;
 	else
 		pmp->pm_flags &= ~MSDOSFSMNT_NOWIN95;
 
 	if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
 		pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
 	else
 		pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
 	return 0;
 }
 
 static int
 msdosfs_cmount(struct mntarg *ma, void *data, uint64_t flags)
 {
 	struct msdosfs_args args;
 	int error;
 
 	if (data == NULL)
 		return (EINVAL);
 	error = copyin(data, &args, sizeof args);
 	if (error)
 		return (error);
 
 	ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
 	ma = mount_arg(ma, "export", &args.export, sizeof(args.export));
 	ma = mount_argf(ma, "uid", "%d", args.uid);
 	ma = mount_argf(ma, "gid", "%d", args.gid);
 	ma = mount_argf(ma, "mask", "%d", args.mask);
 	ma = mount_argf(ma, "dirmask", "%d", args.dirmask);
 
 	ma = mount_argb(ma, args.flags & MSDOSFSMNT_SHORTNAME, "noshortname");
 	ma = mount_argb(ma, args.flags & MSDOSFSMNT_LONGNAME, "nolongname");
 	ma = mount_argb(ma, !(args.flags & MSDOSFSMNT_NOWIN95), "nowin95");
 	ma = mount_argb(ma, args.flags & MSDOSFSMNT_KICONV, "nokiconv");
 
 	ma = mount_argsu(ma, "cs_win", args.cs_win, MAXCSLEN);
 	ma = mount_argsu(ma, "cs_dos", args.cs_dos, MAXCSLEN);
 	ma = mount_argsu(ma, "cs_local", args.cs_local, MAXCSLEN);
 
 	error = kernel_mount(ma, flags);
 
 	return (error);
 }
 
 /*
  * mp - path - addr in user space of mount point (ie /usr or whatever)
  * data - addr in user space of mount params including the name of the block
  * special file to treat as a filesystem.
  */
 static int
 msdosfs_mount(struct mount *mp)
 {
 	struct vnode *devvp, *odevvp;	  /* vnode for blk device to mount */
 	struct thread *td;
 	/* msdosfs specific mount control block */
 	struct msdosfsmount *pmp = NULL;
 	struct nameidata ndp;
 	int error, flags;
 	accmode_t accmode;
 	char *from;
 
 	td = curthread;
 	if (vfs_filteropt(mp->mnt_optnew, msdosfs_opts))
 		return (EINVAL);
 
 	/*
 	 * If updating, check whether changing from read-only to
 	 * read/write; if there is no device name, that's all we do.
 	 */
 	if (mp->mnt_flag & MNT_UPDATE) {
 		pmp = VFSTOMSDOSFS(mp);
 		if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) &&
 		    vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
 			if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
 				return (error);
 			error = vfs_write_suspend_umnt(mp);
 			if (error != 0)
 				return (error);
 
 			flags = WRITECLOSE;
 			if (mp->mnt_flag & MNT_FORCE)
 				flags |= FORCECLOSE;
 			error = vflush(mp, 0, flags, td);
 			if (error != 0) {
 				vfs_write_resume(mp, 0);
 				return (error);
 			}
 
 			/*
 			 * Now the volume is clean.  Mark it so while the
 			 * device is still rw.
 			 */
 			error = markvoldirty(pmp, 0);
 			if (error != 0) {
 				vfs_write_resume(mp, 0);
 				(void)markvoldirty(pmp, 1);
 				return (error);
 			}
 
 			/* Downgrade the device from rw to ro. */
 			g_topology_lock();
 			error = g_access(pmp->pm_cp, 0, -1, 0);
 			g_topology_unlock();
 			if (error) {
 				vfs_write_resume(mp, 0);
 				(void)markvoldirty(pmp, 1);
 				return (error);
 			}
 
 			/*
 			 * Backing out after an error was painful in the
 			 * above.  Now we are committed to succeeding.
 			 */
 			pmp->pm_fmod = 0;
 			pmp->pm_flags |= MSDOSFSMNT_RONLY;
 			MNT_ILOCK(mp);
 			mp->mnt_flag |= MNT_RDONLY;
 			MNT_IUNLOCK(mp);
 			vfs_write_resume(mp, 0);
 		} else if ((pmp->pm_flags & MSDOSFSMNT_RONLY) &&
 		    !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
 			/*
 			 * If upgrade to read-write by non-root, then verify
 			 * that user has necessary permissions on the device.
 			 */
 			odevvp = pmp->pm_odevvp;
 			vn_lock(odevvp, LK_EXCLUSIVE | LK_RETRY);
 			error = VOP_ACCESS(odevvp, VREAD | VWRITE,
 			    td->td_ucred, td);
 			if (error)
 				error = priv_check(td, PRIV_VFS_MOUNT_PERM);
 			if (error) {
 				VOP_UNLOCK(odevvp);
 				return (error);
 			}
 			VOP_UNLOCK(odevvp);
 			g_topology_lock();
 			error = g_access(pmp->pm_cp, 0, 1, 0);
 			g_topology_unlock();
 			if (error)
 				return (error);
 
 			/* Now that the volume is modifiable, mark it dirty. */
 			error = markvoldirty_upgrade(pmp, true, true);
 			if (error) {
 				/*
 				 * If dirtying the superblock failed, drop GEOM
 				 * 'w' refs (we're still RO).
 				 */
 				g_topology_lock();
 				(void)g_access(pmp->pm_cp, 0, -1, 0);
 				g_topology_unlock();
 
 				return (error);
 			}
 
 			pmp->pm_fmod = 1;
 			pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
 			MNT_ILOCK(mp);
 			mp->mnt_flag &= ~MNT_RDONLY;
 			MNT_IUNLOCK(mp);
 		}
 
 		/*
 		 * Avoid namei() below.  The "from" option is not set.
 		 * Update of the devvp is pointless for this case.
 		 */
 		if ((pmp->pm_flags & MSDOSFS_ERR_RO) != 0)
 			return (0);
 	}
 	/*
 	 * Not an update, or updating the name: look up the name
 	 * and verify that it refers to a sensible disk device.
 	 */
 	if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL))
 		return (EINVAL);
 	NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from);
 	error = namei(&ndp);
 	if (error)
 		return (error);
 	devvp = ndp.ni_vp;
 	NDFREE_PNBUF(&ndp);
 
 	if (!vn_isdisk_error(devvp, &error)) {
 		vput(devvp);
 		return (error);
 	}
 	/*
 	 * If mount by non-root, then verify that user has necessary
 	 * permissions on the device.
 	 */
 	accmode = VREAD;
 	if ((mp->mnt_flag & MNT_RDONLY) == 0)
 		accmode |= VWRITE;
 	error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
 	if (error)
 		error = priv_check(td, PRIV_VFS_MOUNT_PERM);
 	if (error) {
 		vput(devvp);
 		return (error);
 	}
 	if ((mp->mnt_flag & MNT_UPDATE) == 0) {
 		error = mountmsdosfs(devvp, mp);
 #ifdef MSDOSFS_DEBUG		/* only needed for the printf below */
 		pmp = VFSTOMSDOSFS(mp);
 #endif
 	} else {
 		vput(devvp);
 		if (devvp != pmp->pm_odevvp)
 			return (EINVAL);	/* XXX needs translation */
 	}
 	if (error) {
 		vrele(devvp);
 		return (error);
 	}
 
 	error = update_mp(mp, td);
 	if (error) {
 		if ((mp->mnt_flag & MNT_UPDATE) == 0)
 			msdosfs_unmount(mp, MNT_FORCE);
 		return error;
 	}
 
 	vfs_mountedfrom(mp, from);
 #ifdef MSDOSFS_DEBUG
 	printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
 #endif
 	return (0);
 }
 
 /*
  * The FAT12 and FAT16 file systems use a limited size root directory that
  * can be created with 1 to 65535 entries for files, directories, or a disk
  * label (but DOS or Windows creates at most 512 root directory entries).
  * This function calculates the number of free root directory entries by
  * counting the non-deleted entries (not starting with 0xE5) and by adding
  * the amount of never used entries (with the position indicated by an
  * entry that starts with 0x00).
  */
 static int
 rootdir_free(struct msdosfsmount* pmp)
 {
 	struct buf *bp;
 	struct direntry *dep;
 	u_long readsize;
 	int dirclu;
 	int diridx;
 	int dirmax;
 	int dirleft;
 	int ffree;
 
 	dirclu = pmp->pm_rootdirblk;
 
 	/*
 	 * The msdosfs code ignores pm_RootDirEnts and uses pm_rootdirsize
 	 * (measured in DEV_BSIZE) to prevent excess root dir allocations.
 	 */
 	dirleft = howmany(pmp->pm_rootdirsize * DEV_BSIZE,
 			  sizeof(struct direntry));
 
 	/* Read in chunks of default maximum root directory size */
 	readsize = 512 * sizeof(struct direntry);
 
 #ifdef MSDOSFS_DEBUG
 	printf("rootdir_free: blkpersec=%lu fatblksize=%lu dirsize=%lu "
 	    "firstclu=%lu dirclu=%d entries=%d rootdirsize=%lu "
 	    "bytespersector=%hu bytepercluster=%lu\n",
 	    pmp->pm_BlkPerSec, pmp->pm_fatblocksize, readsize,
 	    pmp->pm_firstcluster, dirclu, dirleft, pmp->pm_rootdirsize,
 	    pmp->pm_BytesPerSec, pmp->pm_bpcluster);
 #endif
 	ffree = dirleft;
 	while (dirleft > 0 && ffree > 0) {
 		if (readsize > dirleft * sizeof(struct direntry))
 			readsize = dirleft * sizeof(struct direntry);
 #ifdef MSDOSFS_DEBUG
 		printf("rootdir_free: dirclu=%d dirleft=%d readsize=%lu\n",
 		       dirclu, dirleft, readsize);
 #endif
 		if (bread(pmp->pm_devvp, dirclu, readsize, NOCRED, &bp) != 0) {
 			printf("rootdir_free: read error\n");
 			if (bp != NULL)
 				brelse(bp);
 			return (-1);
 		}
 		dirmax = readsize / sizeof(struct direntry);
 		for (diridx = 0; diridx < dirmax && dirleft > 0;
 		     diridx++, dirleft--) {
 			dep = (struct direntry*)bp->b_data + diridx;
 #ifdef MSDOSFS_DEBUG
 			if (dep->deName[0] == SLOT_DELETED)
 				printf("rootdir_free: idx=%d <deleted>\n",
 				    diridx);
 			else if (dep->deName[0] == SLOT_EMPTY)
 				printf("rootdir_free: idx=%d <end marker>\n",
 				    diridx);
 			else if (dep->deAttributes == ATTR_WIN95)
 				printf("rootdir_free: idx=%d <LFN part %d>\n",
 				    diridx, (dep->deName[0] & 0x1f) + 1);
 			else if (dep->deAttributes & ATTR_VOLUME)
 				printf("rootdir_free: idx=%d label='%11.11s'\n",
 				    diridx, dep->deName);
 			else if (dep->deAttributes & ATTR_DIRECTORY)
 				printf("rootdir_free: idx=%d dir='%11.11s'\n",
 				    diridx, dep->deName);
 			else
 				printf("rootdir_free: idx=%d file='%11.11s'\n",
 				    diridx, dep->deName);
 #endif
 			if (dep->deName[0] == SLOT_EMPTY)
 				dirleft = 0;
 			else if (dep->deName[0] != SLOT_DELETED)
 				ffree--;
 		}
 		brelse(bp);
 		bp = NULL;
 		dirclu += readsize / DEV_BSIZE;
 	}
 	return (ffree);
 }
 
 static int
 mountmsdosfs(struct vnode *odevvp, struct mount *mp)
 {
 	struct msdosfsmount *pmp;
 	struct buf *bp;
 	struct cdev *dev;
 	struct vnode *devvp;
 	union bootsector *bsp;
 	struct byte_bpb33 *b33;
 	struct byte_bpb50 *b50;
 	struct byte_bpb710 *b710;
 	uint8_t SecPerClust;
 	u_long clusters;
 	int ronly, error;
 	struct g_consumer *cp;
 	struct bufobj *bo;
 
 	bp = NULL;		/* This and pmp both used in error_exit. */
 	pmp = NULL;
 	ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 
 	devvp = mntfs_allocvp(mp, odevvp);
 	dev = devvp->v_rdev;
 	if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0,
 	    (uintptr_t)mp) == 0) {
 		mntfs_freevp(devvp);
 		return (EBUSY);
 	}
 	g_topology_lock();
 	error = g_vfs_open(devvp, &cp, "msdosfs", ronly ? 0 : 1);
 	g_topology_unlock();
 	if (error != 0) {
 		atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
 		mntfs_freevp(devvp);
 		return (error);
 	}
 	dev_ref(dev);
 	bo = &devvp->v_bufobj;
 	BO_LOCK(&odevvp->v_bufobj);
 	odevvp->v_bufobj.bo_flag |= BO_NOBUFS;
 	BO_UNLOCK(&odevvp->v_bufobj);
 	VOP_UNLOCK(devvp);
 	if (dev->si_iosize_max != 0)
 		mp->mnt_iosize_max = dev->si_iosize_max;
 	if (mp->mnt_iosize_max > maxphys)
 		mp->mnt_iosize_max = maxphys;
 
 	/*
 	 * Read the boot sector of the filesystem, and then check the
 	 * boot signature.  If not a dos boot sector then error out.
 	 *
 	 * NOTE: 8192 is a magic size that works for ffs.
 	 */
 	error = bread(devvp, 0, 8192, NOCRED, &bp);
 	if (error)
 		goto error_exit;
 	bp->b_flags |= B_AGE;
 	bsp = (union bootsector *)bp->b_data;
 	b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
 	b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
 	b710 = (struct byte_bpb710 *)bsp->bs710.bsBPB;
 
 #ifndef MSDOSFS_NOCHECKSIG
 	if (bsp->bs50.bsBootSectSig0 != BOOTSIG0 ||
 	    bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
 		error = EINVAL;
 		goto error_exit;
 	}
 #endif
 
 	pmp = malloc(sizeof(*pmp), M_MSDOSFSMNT, M_WAITOK | M_ZERO);
 	pmp->pm_mountp = mp;
 	pmp->pm_cp = cp;
 	pmp->pm_bo = bo;
 
 	lockinit(&pmp->pm_fatlock, 0, msdosfs_lock_msg, 0, 0);
 	lockinit(&pmp->pm_checkpath_lock, 0, "msdoscp", 0, 0);
 
 	TASK_INIT(&pmp->pm_rw2ro_task, 0, msdosfs_remount_ro, pmp);
 
 	/*
 	 * Initialize ownerships and permissions, since nothing else will
 	 * initialize them iff we are mounting root.
 	 */
 	pmp->pm_uid = UID_ROOT;
 	pmp->pm_gid = GID_WHEEL;
 	pmp->pm_mask = pmp->pm_dirmask = S_IXUSR | S_IXGRP | S_IXOTH |
 	    S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR;
 
 	/*
 	 * Compute several useful quantities from the bpb in the
 	 * bootsector.  Copy in the dos 5 variant of the bpb then fix up
 	 * the fields that are different between dos 5 and dos 3.3.
 	 */
 	SecPerClust = b50->bpbSecPerClust;
 	pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
 	if (pmp->pm_BytesPerSec < DEV_BSIZE) {
 		error = EINVAL;
 		goto error_exit;
 	}
 	pmp->pm_ResSectors = getushort(b50->bpbResSectors);
 	pmp->pm_FATs = b50->bpbFATs;
 	pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
 	pmp->pm_Sectors = getushort(b50->bpbSectors);
 	pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
 	pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
 	pmp->pm_Heads = getushort(b50->bpbHeads);
 	pmp->pm_Media = b50->bpbMedia;
 
 	/* calculate the ratio of sector size to DEV_BSIZE */
 	pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
 
 	/*
 	 * We don't check pm_Heads nor pm_SecPerTrack, because
 	 * these may not be set for EFI file systems. We don't
 	 * use these anyway, so we're unaffected if they are
 	 * invalid.
 	 */
 	if (pmp->pm_BytesPerSec == 0 || SecPerClust == 0) {
 		error = EINVAL;
 		goto error_exit;
 	}
 
 	if (pmp->pm_Sectors == 0) {
 		pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
 		pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
 	} else {
 		pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
 		pmp->pm_HugeSectors = pmp->pm_Sectors;
 	}
 
 	if (pmp->pm_RootDirEnts == 0) {
 		if (pmp->pm_FATsecs != 0 || getushort(b710->bpbFSVers) != 0) {
 			error = EINVAL;
 #ifdef MSDOSFS_DEBUG
 			printf("mountmsdosfs(): bad FAT32 filesystem\n");
 #endif
 			goto error_exit;
 		}
 		pmp->pm_fatmask = FAT32_MASK;
 		pmp->pm_fatmult = 4;
 		pmp->pm_fatdiv = 1;
 		pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
 		if ((getushort(b710->bpbExtFlags) & FATMIRROR) != 0)
 			pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
 		else
 			pmp->pm_flags |= MSDOSFS_FATMIRROR;
 	} else
 		pmp->pm_flags |= MSDOSFS_FATMIRROR;
 
 	/*
 	 * Check a few values (could do some more):
 	 * - logical sector size: power of 2, >= block size
 	 * - sectors per cluster: power of 2, >= 1
 	 * - number of sectors:   >= 1, <= size of partition
 	 * - number of FAT sectors: >= 1
 	 */
 	if (SecPerClust == 0 || (SecPerClust & (SecPerClust - 1)) != 0 ||
 	    pmp->pm_BytesPerSec < DEV_BSIZE ||
 	    (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1)) != 0 ||
 	    pmp->pm_HugeSectors == 0 || pmp->pm_FATsecs == 0 ||
 	    SecPerClust * pmp->pm_BlkPerSec > MAXBSIZE / DEV_BSIZE) {
 		error = EINVAL;
 		goto error_exit;
 	}
 
 	if ((off_t)pmp->pm_HugeSectors * pmp->pm_BytesPerSec <
 	    pmp->pm_HugeSectors /* overflow */ ||
 	    (off_t)pmp->pm_HugeSectors * pmp->pm_BytesPerSec >
 	    cp->provider->mediasize /* past end of vol */) {
 		error = EINVAL;
 		goto error_exit;
 	}
 
 	pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
 	pmp->pm_HiddenSects *= pmp->pm_BlkPerSec;	/* XXX not used? */
 	pmp->pm_FATsecs     *= pmp->pm_BlkPerSec;
 	SecPerClust         *= pmp->pm_BlkPerSec;
 
 	pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
 
 	if (FAT32(pmp)) {
 		pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
 		pmp->pm_firstcluster = pmp->pm_fatblk +
 		    pmp->pm_FATs * pmp->pm_FATsecs;
 		pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
 	} else {
 		pmp->pm_rootdirblk = pmp->pm_fatblk +
 		    pmp->pm_FATs * pmp->pm_FATsecs;
 		pmp->pm_rootdirsize = howmany(pmp->pm_RootDirEnts *
 		    sizeof(struct direntry), DEV_BSIZE); /* in blocks */
 		pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
 	}
 
 	if (pmp->pm_HugeSectors <= pmp->pm_firstcluster) {
 		error = EINVAL;
 		goto error_exit;
 	}
 	pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
 	    SecPerClust + 1;
 	pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE;
 
 	if (pmp->pm_fatmask == 0) {
 		/*
 		 * The last 10 (or 16?) clusters are reserved and must not
 		 * be allocated for data.
 		 */
 		if (pmp->pm_maxcluster < (CLUST_RSRVD & FAT12_MASK)) {
 			/*
 			 * This will usually be a floppy disk. This size makes
 			 * sure that one FAT entry will not be split across
 			 * multiple blocks.
 			 */
 			pmp->pm_fatmask = FAT12_MASK;
 			pmp->pm_fatmult = 3;
 			pmp->pm_fatdiv = 2;
 		} else {
 			pmp->pm_fatmask = FAT16_MASK;
 			pmp->pm_fatmult = 2;
 			pmp->pm_fatdiv = 1;
 		}
 	}
 
-	clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv ;
+	clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
+	if (clusters >= (CLUST_RSRVD & pmp->pm_fatmask))
+		clusters = CLUST_RSRVD & pmp->pm_fatmask;
 	if (pmp->pm_maxcluster >= clusters) {
 #ifdef MSDOSFS_DEBUG
 		printf("Warning: number of clusters (%ld) exceeds FAT "
 		    "capacity (%ld)\n", pmp->pm_maxcluster - 1, clusters);
 #endif
 		pmp->pm_maxcluster = clusters - 1;
 	}
 
 	if (FAT12(pmp))
 		pmp->pm_fatblocksize = 3 * 512;
 	else
 		pmp->pm_fatblocksize = PAGE_SIZE;
 	pmp->pm_fatblocksize = roundup(pmp->pm_fatblocksize,
 	    pmp->pm_BytesPerSec);
 	pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
 	pmp->pm_bnshift = ffs(DEV_BSIZE) - 1;
 
 	/*
 	 * Compute mask and shift value for isolating cluster relative byte
 	 * offsets and cluster numbers from a file offset.
 	 */
 	pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
 	pmp->pm_crbomask = pmp->pm_bpcluster - 1;
 	pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
 
 	/*
 	 * Check for valid cluster size
 	 * must be a power of 2
 	 */
 	if ((pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) != 0) {
 		error = EINVAL;
 		goto error_exit;
 	}
 
 	/*
 	 * Release the bootsector buffer.
 	 */
 	brelse(bp);
 	bp = NULL;
 
 	/*
 	 * Check the fsinfo sector if we have one.  Silently fix up our
 	 * in-core copy of fp->fsinxtfree if it is unknown (0xffffffff)
 	 * or too large.  Ignore fp->fsinfree for now, since we need to
 	 * read the entire FAT anyway to fill the inuse map.
 	 */
 	if (pmp->pm_fsinfo) {
 		struct fsinfo *fp;
 
 		if ((error = bread(devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
 		    NOCRED, &bp)) != 0)
 			goto error_exit;
 		fp = (struct fsinfo *)bp->b_data;
 		if (!bcmp(fp->fsisig1, "RRaA", 4) &&
 		    !bcmp(fp->fsisig2, "rrAa", 4) &&
 		    !bcmp(fp->fsisig3, "\0\0\125\252", 4)) {
 			pmp->pm_nxtfree = getulong(fp->fsinxtfree);
 			if (pmp->pm_nxtfree > pmp->pm_maxcluster)
 				pmp->pm_nxtfree = CLUST_FIRST;
 		} else
 			pmp->pm_fsinfo = 0;
 		brelse(bp);
 		bp = NULL;
 	}
 
 	/*
 	 * Finish initializing pmp->pm_nxtfree (just in case the first few
 	 * sectors aren't properly reserved in the FAT).  This completes
 	 * the fixup for fp->fsinxtfree, and fixes up the zero-initialized
 	 * value if there is no fsinfo.  We will use pmp->pm_nxtfree
 	 * internally even if there is no fsinfo.
 	 */
 	if (pmp->pm_nxtfree < CLUST_FIRST)
 		pmp->pm_nxtfree = CLUST_FIRST;
 
 	/*
 	 * Allocate memory for the bitmap of allocated clusters, and then
 	 * fill it in.
 	 */
 	pmp->pm_inusemap = malloc(howmany(pmp->pm_maxcluster + 1,
 	    N_INUSEBITS) * sizeof(*pmp->pm_inusemap), M_MSDOSFSFAT, M_WAITOK);
 
 	/*
 	 * fillinusemap() needs pm_devvp.
 	 */
 	pmp->pm_devvp = devvp;
 	pmp->pm_odevvp = odevvp;
 	pmp->pm_dev = dev;
 
 	/*
 	 * Have the inuse map filled in.
 	 */
 	MSDOSFS_LOCK_MP(pmp);
 	error = fillinusemap(pmp);
 	MSDOSFS_UNLOCK_MP(pmp);
 	if (error != 0)
 		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.
 	 */
 	if (mp->mnt_flag & MNT_SYNCHRONOUS)
 		pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
 
 	/*
 	 * Finish up.
 	 */
 	if (ronly)
 		pmp->pm_flags |= MSDOSFSMNT_RONLY;
 	else {
 		if ((error = markvoldirty(pmp, 1)) != 0)
 			goto error_exit;
 		pmp->pm_fmod = 1;
 	}
 
 	if (FAT32(pmp)) {
 		pmp->pm_rootdirfree = 0;
 	} else {
 		pmp->pm_rootdirfree = rootdir_free(pmp);
 		if (pmp->pm_rootdirfree < 0)
 			goto error_exit;
 	}
 
 	mp->mnt_data =  pmp;
 	mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
 	mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
 	MNT_ILOCK(mp);
 	mp->mnt_flag |= MNT_LOCAL;
 	mp->mnt_kern_flag |= MNTK_USES_BCACHE | MNTK_NO_IOPF;
 	MNT_IUNLOCK(mp);
 
 	return (0);
 
 error_exit:
 	if (bp != NULL)
 		brelse(bp);
 	if (cp != NULL) {
 		g_topology_lock();
 		g_vfs_close(cp);
 		g_topology_unlock();
 	}
 	if (pmp != NULL) {
 		lockdestroy(&pmp->pm_fatlock);
 		lockdestroy(&pmp->pm_checkpath_lock);
 		free(pmp->pm_inusemap, M_MSDOSFSFAT);
 		free(pmp, M_MSDOSFSMNT);
 		mp->mnt_data = NULL;
 	}
 	BO_LOCK(&odevvp->v_bufobj);
 	odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS;
 	BO_UNLOCK(&odevvp->v_bufobj);
 	atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
 	vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 	mntfs_freevp(devvp);
 	dev_rel(dev);
 	return (error);
 }
 
 /*
  * Unmount the filesystem described by mp.
  */
 static int
 msdosfs_unmount(struct mount *mp, int mntflags)
 {
 	struct msdosfsmount *pmp;
 	int error, flags;
 	bool susp;
 
 	error = flags = 0;
 	pmp = VFSTOMSDOSFS(mp);
 	susp = (pmp->pm_flags & MSDOSFSMNT_RONLY) == 0;
 
 	if (susp) {
 		error = vfs_write_suspend_umnt(mp);
 		if (error != 0)
 			return (error);
 	}
 
 	if ((mntflags & MNT_FORCE) != 0)
 		flags |= FORCECLOSE;
 	error = vflush(mp, 0, flags, curthread);
 	if (error != 0 && error != ENXIO) {
 		if (susp)
 			vfs_write_resume(mp, VR_START_WRITE);
 		return (error);
 	}
 	if (susp) {
 		error = markvoldirty(pmp, 0);
 		if (error != 0 && error != ENXIO) {
 			if (susp)
 				vfs_write_resume(mp, VR_START_WRITE);
 			(void)markvoldirty(pmp, 1);
 			return (error);
 		}
 	}
 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
 		if (pmp->pm_w2u)
 			msdosfs_iconv->close(pmp->pm_w2u);
 		if (pmp->pm_u2w)
 			msdosfs_iconv->close(pmp->pm_u2w);
 		if (pmp->pm_d2u)
 			msdosfs_iconv->close(pmp->pm_d2u);
 		if (pmp->pm_u2d)
 			msdosfs_iconv->close(pmp->pm_u2d);
 	}
 
 #ifdef MSDOSFS_DEBUG
 	{
 		struct vnode *vp = pmp->pm_devvp;
 		struct bufobj *bo;
 
 		bo = &vp->v_bufobj;
 		BO_LOCK(bo);
 		VI_LOCK(vp);
 		vn_printf(vp,
 		    "msdosfs_umount(): just before calling VOP_CLOSE()\n");
 		printf("freef %p, freeb %p, mount %p\n",
 		    TAILQ_NEXT(vp, v_vnodelist), vp->v_vnodelist.tqe_prev,
 		    vp->v_mount);
 		printf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
 		    TAILQ_FIRST(&vp->v_bufobj.bo_clean.bv_hd),
 		    TAILQ_FIRST(&vp->v_bufobj.bo_dirty.bv_hd),
 		    vp->v_bufobj.bo_numoutput, vp->v_type);
 		VI_UNLOCK(vp);
 		BO_UNLOCK(bo);
 	}
 #endif
 	if (susp)
 		vfs_write_resume(mp, VR_START_WRITE);
 
 	vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
 	g_topology_lock();
 	g_vfs_close(pmp->pm_cp);
 	g_topology_unlock();
 	BO_LOCK(&pmp->pm_odevvp->v_bufobj);
 	pmp->pm_odevvp->v_bufobj.bo_flag &= ~BO_NOBUFS;
 	BO_UNLOCK(&pmp->pm_odevvp->v_bufobj);
 	atomic_store_rel_ptr((uintptr_t *)&pmp->pm_dev->si_mountpt, 0);
 	mntfs_freevp(pmp->pm_devvp);
 	vrele(pmp->pm_odevvp);
 	dev_rel(pmp->pm_dev);
 	free(pmp->pm_inusemap, M_MSDOSFSFAT);
 	lockdestroy(&pmp->pm_fatlock);
 	lockdestroy(&pmp->pm_checkpath_lock);
 	free(pmp, M_MSDOSFSMNT);
 	mp->mnt_data = NULL;
 	return (error);
 }
 
 static void
 msdosfs_remount_ro(void *arg, int pending)
 {
 	struct msdosfsmount *pmp;
 	int error;
 
 	pmp = arg;
 
 	MSDOSFS_LOCK_MP(pmp);
 	if ((pmp->pm_flags & MSDOSFS_ERR_RO) != 0) {
 		while ((pmp->pm_flags & MSDOSFS_ERR_RO) != 0)
 			msleep(&pmp->pm_flags, &pmp->pm_fatlock, PVFS,
 			    "msdoserrro", hz);
 	} else if ((pmp->pm_mountp->mnt_flag & MNT_RDONLY) == 0) {
 		pmp->pm_flags |= MSDOSFS_ERR_RO;
 		MSDOSFS_UNLOCK_MP(pmp);
 		printf("%s: remounting read-only due to corruption\n",
 		    pmp->pm_mountp->mnt_stat.f_mntfromname);
 		error = vfs_remount_ro(pmp->pm_mountp);
 		if (error != 0)
 			printf("%s: remounting read-only failed: error %d\n",
 			    pmp->pm_mountp->mnt_stat.f_mntfromname, error);
 		else
 			printf("remounted %s read-only\n",
 			    pmp->pm_mountp->mnt_stat.f_mntfromname);
 		MSDOSFS_LOCK_MP(pmp);
 		pmp->pm_flags &= ~MSDOSFS_ERR_RO;
 		wakeup(&pmp->pm_flags);
 	}
 	MSDOSFS_UNLOCK_MP(pmp);
 
 	while (--pending >= 0)
 		vfs_unbusy(pmp->pm_mountp);
 }
 
 void
 msdosfs_integrity_error(struct msdosfsmount *pmp)
 {
 	int error;
 
 	error = vfs_busy(pmp->pm_mountp, MBF_NOWAIT);
 	if (error == 0) {
 		error = taskqueue_enqueue(taskqueue_thread,
 		    &pmp->pm_rw2ro_task);
 		if (error != 0) {
 			printf("%s: integrity error scheduling failed, "
 			    "error %d\n",
 			    pmp->pm_mountp->mnt_stat.f_mntfromname, error);
 			vfs_unbusy(pmp->pm_mountp);
 		}
 	} else {
 		printf("%s: integrity error busying failed, error %d\n",
 		    pmp->pm_mountp->mnt_stat.f_mntfromname, error);
 	}
 }
 
 static int
 msdosfs_root(struct mount *mp, int flags, struct vnode **vpp)
 {
 	struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
 	struct denode *ndep;
 	int error;
 
 #ifdef MSDOSFS_DEBUG
 	printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
 #endif
 	error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, LK_EXCLUSIVE, &ndep);
 	if (error)
 		return (error);
 	*vpp = DETOV(ndep);
 	return (0);
 }
 
 static int
 msdosfs_statfs(struct mount *mp, struct statfs *sbp)
 {
 	struct msdosfsmount *pmp;
 
 	pmp = VFSTOMSDOSFS(mp);
 	sbp->f_bsize = pmp->pm_bpcluster;
 	sbp->f_iosize = pmp->pm_bpcluster;
 	sbp->f_blocks = pmp->pm_maxcluster - CLUST_FIRST + 1;
 	sbp->f_bfree = pmp->pm_freeclustercount;
 	sbp->f_bavail = pmp->pm_freeclustercount;
 	sbp->f_files =	howmany(pmp->pm_rootdirsize * DEV_BSIZE,
 				sizeof(struct direntry));
 	sbp->f_ffree = pmp->pm_rootdirfree;
 	return (0);
 }
 
 /*
  * If we have an FSInfo block, update it.
  */
 static int
 msdosfs_fsiflush(struct msdosfsmount *pmp, int waitfor)
 {
 	struct fsinfo *fp;
 	struct buf *bp;
 	int error;
 
 	MSDOSFS_LOCK_MP(pmp);
 	if (pmp->pm_fsinfo == 0 || (pmp->pm_flags & MSDOSFS_FSIMOD) == 0) {
 		error = 0;
 		goto unlock;
 	}
 	error = bread(pmp->pm_devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
 	    NOCRED, &bp);
 	if (error != 0) {
 		goto unlock;
 	}
 	fp = (struct fsinfo *)bp->b_data;
 	putulong(fp->fsinfree, pmp->pm_freeclustercount);
 	putulong(fp->fsinxtfree, pmp->pm_nxtfree);
 	pmp->pm_flags &= ~MSDOSFS_FSIMOD;
 	if (waitfor == MNT_WAIT)
 		error = bwrite(bp);
 	else
 		bawrite(bp);
 unlock:
 	MSDOSFS_UNLOCK_MP(pmp);
 	return (error);
 }
 
 static int
 msdosfs_sync(struct mount *mp, int waitfor)
 {
 	struct vnode *vp, *nvp;
 	struct thread *td;
 	struct denode *dep;
 	struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
 	int error, allerror = 0;
 
 	td = curthread;
 
 	/*
 	 * 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_flags & MSDOSFSMNT_RONLY)
 			panic("msdosfs_sync: rofs mod");
 		else {
 			/* update FATs here */
 		}
 	}
 	/*
 	 * Write back each (modified) denode.
 	 */
 loop:
 	MNT_VNODE_FOREACH_ALL(vp, mp, nvp) {
 		if (vp->v_type == VNON) {
 			VI_UNLOCK(vp);
 			continue;
 		}
 		dep = VTODE(vp);
 		if ((dep->de_flag &
 		    (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
 		    (vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
 		    waitfor == MNT_LAZY)) {
 			VI_UNLOCK(vp);
 			continue;
 		}
 		error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
 		if (error) {
 			if (error == ENOENT) {
 				MNT_VNODE_FOREACH_ALL_ABORT(mp, nvp);
 				goto loop;
 			}
 			continue;
 		}
 		error = VOP_FSYNC(vp, waitfor, td);
 		if (error)
 			allerror = error;
 		vput(vp);
 	}
 
 	/*
 	 * Flush filesystem control info.
 	 */
 	if (waitfor != MNT_LAZY) {
 		vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
 		error = VOP_FSYNC(pmp->pm_devvp, waitfor, td);
 		if (error)
 			allerror = error;
 		VOP_UNLOCK(pmp->pm_devvp);
 	}
 
 	error = msdosfs_fsiflush(pmp, waitfor);
 	if (error != 0)
 		allerror = error;
 
 	if (allerror == 0 && waitfor == MNT_SUSPEND) {
 		MNT_ILOCK(mp);
 		mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED;
 		MNT_IUNLOCK(mp);
 	}
 	return (allerror);
 }
 
 static int
 msdosfs_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
 {
 	struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
 	struct defid *defhp = (struct defid *) fhp;
 	struct denode *dep;
 	int error;
 
 	error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs,
 	    LK_EXCLUSIVE, &dep);
 	if (error) {
 		*vpp = NULLVP;
 		return (error);
 	}
 	*vpp = DETOV(dep);
 	vnode_create_vobject(*vpp, dep->de_FileSize, curthread);
 	return (0);
 }
 
 static struct vfsops msdosfs_vfsops = {
 	.vfs_fhtovp =		msdosfs_fhtovp,
 	.vfs_mount =		msdosfs_mount,
 	.vfs_cmount =		msdosfs_cmount,
 	.vfs_root =		msdosfs_root,
 	.vfs_statfs =		msdosfs_statfs,
 	.vfs_sync =		msdosfs_sync,
 	.vfs_unmount =		msdosfs_unmount,
 };
 
 VFS_SET(msdosfs_vfsops, msdosfs, 0);
 MODULE_VERSION(msdosfs, 1);