1 /* $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/msdosfs/Attic/msdosfs_vfsops.c,v 1.60.2.8 2004/03/02 09:43:04 tjr Exp $ */
2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vfsops.c,v 1.52 2008/09/17 21:44:24 dillon Exp $ */
3 /* $NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $ */
6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by TooLs GmbH.
22 * 4. The name of TooLs GmbH may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
42 * This software is provided "as is".
44 * The author supplies this software to be publicly redistributed on the
45 * understanding that the author is not responsible for the correct
46 * functioning of this software in any circumstances and is not liable for
47 * any damages caused by this software.
52 #include <sys/param.h>
53 #include <sys/systm.h>
56 #include <sys/nlookup.h>
57 #include <sys/kernel.h>
58 #include <sys/vnode.h>
59 #include <sys/mount.h>
61 #include <sys/fcntl.h>
62 #include <sys/malloc.h>
63 #include <sys/stat.h> /* defines ALLPERMS */
64 #include <vm/vm_zone.h>
70 #include "msdosfsmount.h"
73 extern struct vop_ops msdosfs_vnode_vops;
75 #define MSDOSFS_DFLTBSIZE 4096
79 * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
80 * garbage or a random value :-{
81 * If you want to use that broken-signatured media, define the
82 * following symbol even though PC/AT.
83 * (ex. mount PC-98 DOS formatted FD on PC/AT)
85 #define MSDOSFS_NOCHECKSIG
88 MALLOC_DEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOSFS mount structure");
89 static MALLOC_DEFINE(M_MSDOSFSFAT, "MSDOSFS FAT", "MSDOSFS file allocation table");
91 static int update_mp (struct mount *mp, struct msdosfs_args *argp);
92 static int mountmsdosfs (struct vnode *devvp, struct mount *mp,
93 struct msdosfs_args *argp);
94 static int msdosfs_fhtovp (struct mount *, struct vnode *,
95 struct fid *, struct vnode **);
96 static int msdosfs_checkexp (struct mount *, struct sockaddr *,
97 int *, struct ucred **);
98 static int msdosfs_mount (struct mount *, char *, caddr_t,
100 static int msdosfs_root (struct mount *, struct vnode **);
101 static int msdosfs_statfs (struct mount *, struct statfs *,
103 static int msdosfs_sync (struct mount *, int);
104 static int msdosfs_unmount (struct mount *, int);
105 static int msdosfs_vptofh (struct vnode *, struct fid *);
108 update_mp(struct mount *mp, struct msdosfs_args *argp)
110 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
113 pmp->pm_gid = argp->gid;
114 pmp->pm_uid = argp->uid;
115 pmp->pm_mask = argp->mask & ALLPERMS;
116 pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT;
117 if (pmp->pm_flags & MSDOSFSMNT_U2WTABLE) {
118 bcopy(argp->u2w, pmp->pm_u2w, sizeof(pmp->pm_u2w));
119 bcopy(argp->d2u, pmp->pm_d2u, sizeof(pmp->pm_d2u));
120 bcopy(argp->u2d, pmp->pm_u2d, sizeof(pmp->pm_u2d));
122 if (pmp->pm_flags & MSDOSFSMNT_ULTABLE) {
123 bcopy(argp->ul, pmp->pm_ul, sizeof(pmp->pm_ul));
124 bcopy(argp->lu, pmp->pm_lu, sizeof(pmp->pm_lu));
127 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
128 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
129 else if (!(pmp->pm_flags &
130 (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
131 struct vnode *rootvp;
134 * Try to divine whether to support Win'95 long filenames
137 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
139 if ((error = msdosfs_root(mp, &rootvp)) != 0)
141 pmp->pm_flags |= findwin95(VTODE(rootvp))
142 ? MSDOSFSMNT_LONGNAME
143 : MSDOSFSMNT_SHORTNAME;
151 * mp - path - addr in user space of mount point (ie /usr or whatever)
152 * data - addr in user space of mount params including the name of the block
153 * special file to treat as a filesystem.
156 msdosfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
158 struct vnode *devvp; /* vnode for blk device to mount */
159 struct msdosfs_args args; /* will hold data from mount request */
160 /* msdosfs specific mount control block */
161 struct msdosfsmount *pmp = NULL;
165 struct nlookupdata nd;
167 error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args));
170 if (args.magic != MSDOSFS_ARGSMAGIC)
173 * If updating, check whether changing from read-only to
174 * read/write; if there is no device name, that's all we do.
176 if (mp->mnt_flag & MNT_UPDATE) {
177 pmp = VFSTOMSDOSFS(mp);
179 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
181 if (mp->mnt_flag & MNT_FORCE)
183 error = vflush(mp, 0, flags);
185 devvp = pmp->pm_devvp;
186 VOP_OPEN(devvp, FREAD, FSCRED, NULL);
187 VOP_CLOSE(devvp, FREAD|FWRITE);
188 pmp->pm_flags |= MSDOSFSMNT_RONLY;
191 if (!error && (mp->mnt_flag & MNT_RELOAD))
192 /* not yet implemented */
196 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
198 * If upgrade to read-write by non-root, then verify
199 * that user has necessary permissions on the device.
201 devvp = pmp->pm_devvp;
202 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
203 if (cred->cr_uid != 0) {
204 error = VOP_ACCESS(devvp, VREAD | VWRITE, cred);
210 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL);
211 VOP_CLOSE(devvp, FREAD);
213 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
215 if (args.fspec == 0) {
216 #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */
217 if (args.flags & MSDOSFSMNT_MNTOPT) {
218 pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
219 pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;
220 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
221 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
225 * Process export requests.
227 return (vfs_export(mp, &pmp->pm_export, &args.export));
231 * Not an update, or updating the name: look up the name
232 * and verify that it refers to a sensible block device.
235 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
237 error = nlookup(&nd);
239 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
244 if (!vn_isdisk(devvp, &error)) {
249 * If mount by non-root, then verify that user has necessary
250 * permissions on the device.
252 if (cred->cr_uid != 0) {
254 if ((mp->mnt_flag & MNT_RDONLY) == 0)
255 accessmode |= VWRITE;
256 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
257 error = VOP_ACCESS(devvp, accessmode, cred);
264 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
265 error = mountmsdosfs(devvp, mp, &args);
266 #ifdef MSDOSFS_DEBUG /* only needed for the kprintf below */
267 pmp = VFSTOMSDOSFS(mp);
270 if (devvp != pmp->pm_devvp)
271 error = EINVAL; /* XXX needs translation */
280 error = update_mp(mp, &args);
282 msdosfs_unmount(mp, MNT_FORCE);
286 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
287 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
288 msdosfs_statfs(mp, &mp->mnt_stat, cred);
290 kprintf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
296 mountmsdosfs(struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp)
298 struct msdosfsmount *pmp;
301 union bootsector *bsp;
302 struct byte_bpb33 *b33;
303 struct byte_bpb50 *b50;
304 struct byte_bpb710 *b710;
305 u_int8_t SecPerClust;
310 * Disallow multiple mounts of the same device.
311 * Disallow mounting of a device that is currently in use
312 * Flush out any old buffers remaining from a previous use.
314 error = vfs_mountedon(devvp);
317 if (count_udev(devvp->v_umajor, devvp->v_uminor) > 0)
319 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
320 error = vinvalbuf(devvp, V_SAVE, 0, 0);
325 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
326 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
327 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
332 bp = NULL; /* both used in error_exit */
336 * Read the boot sector of the filesystem, and then check the
337 * boot signature. If not a dos boot sector then error out.
339 * NOTE: 2048 is a maximum sector size in current...
341 error = bread(devvp, 0, 2048, &bp);
344 bp->b_flags |= B_AGE;
345 bsp = (union bootsector *)bp->b_data;
346 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
347 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
348 b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP;
350 #ifndef MSDOSFS_NOCHECKSIG
351 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
352 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
358 pmp = kmalloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO);
362 * Compute several useful quantities from the bpb in the
363 * bootsector. Copy in the dos 5 variant of the bpb then fix up
364 * the fields that are different between dos 5 and dos 3.3.
366 SecPerClust = b50->bpbSecPerClust;
367 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
368 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
369 pmp->pm_FATs = b50->bpbFATs;
370 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
371 pmp->pm_Sectors = getushort(b50->bpbSectors);
372 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
373 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
374 pmp->pm_Heads = getushort(b50->bpbHeads);
375 pmp->pm_Media = b50->bpbMedia;
377 /* calculate the ratio of sector size to DEV_BSIZE */
378 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
381 * We don't check pm_Heads nor pm_SecPerTrack, because
382 * these may not be set for EFI file systems. We don't
383 * use these anyway, so we're unaffected if they are
386 if (!pmp->pm_BytesPerSec || !SecPerClust) {
391 if (pmp->pm_Sectors == 0) {
392 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
393 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
395 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
396 pmp->pm_HugeSectors = pmp->pm_Sectors;
399 if (pmp->pm_RootDirEnts == 0) {
402 || getushort(b710->bpbFSVers)) {
404 kprintf("mountmsdosfs(): bad FAT32 filesystem\n");
407 pmp->pm_fatmask = FAT32_MASK;
410 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
411 if (getushort(b710->bpbExtFlags) & FATMIRROR)
412 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
414 pmp->pm_flags |= MSDOSFS_FATMIRROR;
416 pmp->pm_flags |= MSDOSFS_FATMIRROR;
419 * Check a few values (could do some more):
420 * - logical sector size: power of 2, >= block size
421 * - sectors per cluster: power of 2, >= 1
422 * - number of sectors: >= 1, <= size of partition
424 if ( (SecPerClust == 0)
425 || (SecPerClust & (SecPerClust - 1))
426 || (pmp->pm_BytesPerSec < DEV_BSIZE)
427 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
428 || (pmp->pm_HugeSectors == 0)
434 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
435 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
436 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
437 SecPerClust *= pmp->pm_BlkPerSec;
439 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
442 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
443 pmp->pm_firstcluster = pmp->pm_fatblk
444 + (pmp->pm_FATs * pmp->pm_FATsecs);
445 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
447 pmp->pm_rootdirblk = pmp->pm_fatblk +
448 (pmp->pm_FATs * pmp->pm_FATsecs);
449 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
451 / DEV_BSIZE; /* in blocks */
452 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
455 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
457 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
459 if (pmp->pm_fatmask == 0) {
460 if (pmp->pm_maxcluster
461 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
463 * This will usually be a floppy disk. This size makes
464 * sure that one fat entry will not be split across
467 pmp->pm_fatmask = FAT12_MASK;
471 pmp->pm_fatmask = FAT16_MASK;
477 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
478 if (pmp->pm_maxcluster >= clusters) {
479 kprintf("Warning: number of clusters (%ld) exceeds FAT "
480 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
481 pmp->pm_maxcluster = clusters - 1;
486 pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
488 pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE;
490 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
491 pmp->pm_bnshift = DEV_BSHIFT;
494 * Compute mask and shift value for isolating cluster relative byte
495 * offsets and cluster numbers from a file offset.
497 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
498 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
499 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
502 * Check for valid cluster size
503 * must be a power of 2
505 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
511 * Release the bootsector buffer.
519 if (pmp->pm_fsinfo) {
522 if ((error = bread(devvp, de_bntodoff(pmp, pmp->pm_fsinfo), fsi_size(pmp), &bp)) != 0)
524 fp = (struct fsinfo *)bp->b_data;
525 if (!bcmp(fp->fsisig1, "RRaA", 4)
526 && !bcmp(fp->fsisig2, "rrAa", 4)
527 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)
528 && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) {
529 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
530 if (pmp->pm_nxtfree == 0xffffffff)
531 pmp->pm_nxtfree = CLUST_FIRST;
539 * Check and validate (or perhaps invalidate?) the fsinfo structure?
541 if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
543 "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n",
544 pmp->pm_nxtfree, pmp->pm_maxcluster);
550 * Allocate memory for the bitmap of allocated clusters, and then
553 pmp->pm_inusemap = kmalloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
555 * sizeof(*pmp->pm_inusemap),
556 M_MSDOSFSFAT, M_WAITOK);
559 * fillinusemap() needs pm_devvp.
562 pmp->pm_devvp = devvp;
565 * Have the inuse map filled in.
567 if ((error = fillinusemap(pmp)) != 0)
571 * If they want fat updates to be synchronous then let them suffer
572 * the performance degradation in exchange for the on disk copy of
573 * the fat being correct just about all the time. I suppose this
574 * would be a good thing to turn on if the kernel is still flakey.
576 if (mp->mnt_flag & MNT_SYNCHRONOUS)
577 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
583 pmp->pm_flags |= MSDOSFSMNT_RONLY;
586 mp->mnt_data = (qaddr_t) pmp;
587 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
588 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
589 mp->mnt_flag |= MNT_LOCAL;
590 vfs_add_vnodeops(mp, &msdosfs_vnode_vops, &mp->mnt_vn_norm_ops);
591 dev->si_mountpoint = mp;
598 VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE);
600 if (pmp->pm_inusemap)
601 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
602 kfree(pmp, M_MSDOSFSMNT);
603 mp->mnt_data = (qaddr_t)0;
609 * Unmount the filesystem described by mp.
612 msdosfs_unmount(struct mount *mp, int mntflags)
614 struct msdosfsmount *pmp;
618 if (mntflags & MNT_FORCE)
620 error = vflush(mp, 0, flags);
623 pmp = VFSTOMSDOSFS(mp);
624 pmp->pm_devvp->v_rdev->si_mountpoint = NULL;
627 struct vnode *vp = pmp->pm_devvp;
629 kprintf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
630 kprintf("flag %08x, sysrefs %d, writecount %d, auxrefs %d\n",
631 vp->v_flag, vp->v_sysref.refcnt,
632 vp->v_writecount, vp->v_auxrefs);
633 kprintf("mount %p, op %p\n", vp->v_mount, vp->v_ops);
634 kprintf("mount %p\n", vp->v_mount);
635 kprintf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
636 RB_ROOT(&vp->v_rbclean_tree),
637 RB_ROOT(&vp->v_rbdirty_tree),
638 vp->v_track_write.bk_active, vp->v_type);
639 kprintf("union %p, tag %d, data[0] %08x, data[1] %08x\n",
640 vp->v_socket, vp->v_tag,
641 ((u_int *)vp->v_data)[0],
642 ((u_int *)vp->v_data)[1]);
645 error = VOP_CLOSE(pmp->pm_devvp,
646 (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE);
647 vrele(pmp->pm_devvp);
648 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
649 kfree(pmp, M_MSDOSFSMNT);
650 mp->mnt_data = (qaddr_t)0;
651 mp->mnt_flag &= ~MNT_LOCAL;
656 msdosfs_root(struct mount *mp, struct vnode **vpp)
658 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
663 kprintf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
665 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
673 msdosfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
675 struct msdosfsmount *pmp;
677 pmp = VFSTOMSDOSFS(mp);
678 sbp->f_bsize = pmp->pm_bpcluster;
679 sbp->f_iosize = pmp->pm_bpcluster;
680 sbp->f_blocks = pmp->pm_maxcluster + 1;
681 sbp->f_bfree = pmp->pm_freeclustercount;
682 sbp->f_bavail = pmp->pm_freeclustercount;
683 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
684 sbp->f_ffree = 0; /* what to put in here? */
685 if (sbp != &mp->mnt_stat) {
686 sbp->f_type = mp->mnt_vfc->vfc_typenum;
687 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
689 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
699 static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data);
702 msdosfs_sync(struct mount *mp, int waitfor)
704 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
705 struct scaninfo scaninfo;
709 * If we ever switch to not updating all of the fats all the time,
710 * this would be the place to update them from the first one.
712 if (pmp->pm_fmod != 0) {
713 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
714 panic("msdosfs_sync: rofs mod");
716 /* update fats here */
720 * Write back each (modified) denode.
722 scaninfo.allerror = 0;
724 while (scaninfo.rescan) {
726 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, NULL, msdosfs_sync_scan, &scaninfo);
730 * Flush filesystem control info.
732 if (waitfor != MNT_LAZY) {
733 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
734 if ((error = VOP_FSYNC(pmp->pm_devvp, waitfor)) != 0)
735 scaninfo.allerror = error;
736 vn_unlock(pmp->pm_devvp);
738 return (scaninfo.allerror);
742 msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data)
744 struct scaninfo *info = data;
749 if (vp->v_type == VNON || vp->v_type == VBAD ||
751 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
752 (RB_EMPTY(&vp->v_rbdirty_tree) || info->waitfor == MNT_LAZY))) {
755 if ((error = VOP_FSYNC(vp, info->waitfor)) != 0)
756 info->allerror = error;
761 msdosfs_fhtovp(struct mount *mp, struct vnode *rootvp,
762 struct fid *fhp, struct vnode **vpp)
764 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
765 struct defid *defhp = (struct defid *) fhp;
769 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
779 msdosfs_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
780 struct ucred **credanonp)
782 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
785 np = vfs_export_lookup(mp, &pmp->pm_export, nam);
788 *exflagsp = np->netc_exflags;
789 *credanonp = &np->netc_anon;
794 msdosfs_vptofh(struct vnode *vp, struct fid *fhp)
800 defhp = (struct defid *)fhp;
801 defhp->defid_len = sizeof(struct defid);
802 defhp->defid_dirclust = dep->de_dirclust;
803 defhp->defid_dirofs = dep->de_diroffset;
804 /* defhp->defid_gen = dep->de_gen; */
808 static struct vfsops msdosfs_vfsops = {
809 .vfs_mount = msdosfs_mount,
810 .vfs_unmount = msdosfs_unmount,
811 .vfs_root = msdosfs_root,
812 .vfs_statfs = msdosfs_statfs,
813 .vfs_sync = msdosfs_sync,
814 .vfs_fhtovp = msdosfs_fhtovp,
815 .vfs_checkexp = msdosfs_checkexp,
816 .vfs_vptofh = msdosfs_vptofh,
817 .vfs_init = msdosfs_init,
818 .vfs_uninit = msdosfs_uninit
821 VFS_SET(msdosfs_vfsops, msdos, 0);