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 #ifndef __DragonFly__
129 * GEMDOS knows nothing (yet) about win95
131 if (pmp->pm_flags & MSDOSFSMNT_GEMDOSFS)
132 pmp->pm_flags |= MSDOSFSMNT_NOWIN95;
135 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
136 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
137 else if (!(pmp->pm_flags &
138 (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
139 struct vnode *rootvp;
142 * Try to divine whether to support Win'95 long filenames
145 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
147 if ((error = msdosfs_root(mp, &rootvp)) != 0)
149 pmp->pm_flags |= findwin95(VTODE(rootvp))
150 ? MSDOSFSMNT_LONGNAME
151 : MSDOSFSMNT_SHORTNAME;
159 * mp - path - addr in user space of mount point (ie /usr or whatever)
160 * data - addr in user space of mount params including the name of the block
161 * special file to treat as a filesystem.
164 msdosfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
166 struct vnode *devvp; /* vnode for blk device to mount */
167 struct msdosfs_args args; /* will hold data from mount request */
168 /* msdosfs specific mount control block */
169 struct msdosfsmount *pmp = NULL;
173 struct nlookupdata nd;
175 error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args));
178 if (args.magic != MSDOSFS_ARGSMAGIC)
181 * If updating, check whether changing from read-only to
182 * read/write; if there is no device name, that's all we do.
184 if (mp->mnt_flag & MNT_UPDATE) {
185 pmp = VFSTOMSDOSFS(mp);
187 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
189 if (mp->mnt_flag & MNT_FORCE)
191 error = vflush(mp, 0, flags);
193 devvp = pmp->pm_devvp;
194 VOP_OPEN(devvp, FREAD, FSCRED, NULL);
195 VOP_CLOSE(devvp, FREAD|FWRITE);
196 pmp->pm_flags |= MSDOSFSMNT_RONLY;
199 if (!error && (mp->mnt_flag & MNT_RELOAD))
200 /* not yet implemented */
204 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
206 * If upgrade to read-write by non-root, then verify
207 * that user has necessary permissions on the device.
209 devvp = pmp->pm_devvp;
210 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
211 if (cred->cr_uid != 0) {
212 error = VOP_ACCESS(devvp, VREAD | VWRITE, cred);
218 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL);
219 VOP_CLOSE(devvp, FREAD);
221 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
223 if (args.fspec == 0) {
224 #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */
225 if (args.flags & MSDOSFSMNT_MNTOPT) {
226 pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
227 pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;
228 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
229 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
233 * Process export requests.
235 return (vfs_export(mp, &pmp->pm_export, &args.export));
239 * Not an update, or updating the name: look up the name
240 * and verify that it refers to a sensible block device.
243 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
245 error = nlookup(&nd);
247 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
252 if (!vn_isdisk(devvp, &error)) {
257 * If mount by non-root, then verify that user has necessary
258 * permissions on the device.
260 if (cred->cr_uid != 0) {
262 if ((mp->mnt_flag & MNT_RDONLY) == 0)
263 accessmode |= VWRITE;
264 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
265 error = VOP_ACCESS(devvp, accessmode, cred);
272 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
273 error = mountmsdosfs(devvp, mp, &args);
274 #ifdef MSDOSFS_DEBUG /* only needed for the kprintf below */
275 pmp = VFSTOMSDOSFS(mp);
278 if (devvp != pmp->pm_devvp)
279 error = EINVAL; /* XXX needs translation */
288 error = update_mp(mp, &args);
290 msdosfs_unmount(mp, MNT_FORCE);
294 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
295 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
296 msdosfs_statfs(mp, &mp->mnt_stat, cred);
298 kprintf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
304 mountmsdosfs(struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp)
306 struct msdosfsmount *pmp;
309 union bootsector *bsp;
310 struct byte_bpb33 *b33;
311 struct byte_bpb50 *b50;
312 struct byte_bpb710 *b710;
313 u_int8_t SecPerClust;
318 * Disallow multiple mounts of the same device.
319 * Disallow mounting of a device that is currently in use
320 * Flush out any old buffers remaining from a previous use.
322 error = vfs_mountedon(devvp);
325 if (count_udev(devvp->v_umajor, devvp->v_uminor) > 0)
327 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
328 error = vinvalbuf(devvp, V_SAVE, 0, 0);
333 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
334 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
335 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
340 bp = NULL; /* both used in error_exit */
344 * Read the boot sector of the filesystem, and then check the
345 * boot signature. If not a dos boot sector then error out.
347 * NOTE: 2048 is a maximum sector size in current...
349 error = bread(devvp, 0, 2048, &bp);
352 bp->b_flags |= B_AGE;
353 bsp = (union bootsector *)bp->b_data;
354 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
355 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
356 b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP;
358 #ifndef __DragonFly__
359 if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
361 #ifndef MSDOSFS_NOCHECKSIG
362 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
363 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
368 #ifndef __DragonFly__
372 pmp = kmalloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO);
376 * Compute several useful quantities from the bpb in the
377 * bootsector. Copy in the dos 5 variant of the bpb then fix up
378 * the fields that are different between dos 5 and dos 3.3.
380 SecPerClust = b50->bpbSecPerClust;
381 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
382 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
383 pmp->pm_FATs = b50->bpbFATs;
384 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
385 pmp->pm_Sectors = getushort(b50->bpbSectors);
386 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
387 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
388 pmp->pm_Heads = getushort(b50->bpbHeads);
389 pmp->pm_Media = b50->bpbMedia;
391 /* calculate the ratio of sector size to DEV_BSIZE */
392 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
394 #ifndef __DragonFly__
395 if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
397 /* XXX - We should probably check more values here */
398 if (!pmp->pm_BytesPerSec || !SecPerClust
400 || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) {
404 #ifndef __DragonFly__
408 if (pmp->pm_Sectors == 0) {
409 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
410 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
412 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
413 pmp->pm_HugeSectors = pmp->pm_Sectors;
416 if (pmp->pm_RootDirEnts == 0) {
417 if (bsp->bs710.bsBootSectSig2 != BOOTSIG2
418 || bsp->bs710.bsBootSectSig3 != BOOTSIG3
421 || getushort(b710->bpbFSVers)) {
423 kprintf("mountmsdosfs(): bad FAT32 filesystem\n");
426 pmp->pm_fatmask = FAT32_MASK;
429 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
430 if (getushort(b710->bpbExtFlags) & FATMIRROR)
431 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
433 pmp->pm_flags |= MSDOSFS_FATMIRROR;
435 pmp->pm_flags |= MSDOSFS_FATMIRROR;
438 * Check a few values (could do some more):
439 * - logical sector size: power of 2, >= block size
440 * - sectors per cluster: power of 2, >= 1
441 * - number of sectors: >= 1, <= size of partition
443 if ( (SecPerClust == 0)
444 || (SecPerClust & (SecPerClust - 1))
445 || (pmp->pm_BytesPerSec < DEV_BSIZE)
446 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
447 || (pmp->pm_HugeSectors == 0)
453 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
454 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
455 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
456 SecPerClust *= pmp->pm_BlkPerSec;
458 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
461 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
462 pmp->pm_firstcluster = pmp->pm_fatblk
463 + (pmp->pm_FATs * pmp->pm_FATsecs);
464 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
466 pmp->pm_rootdirblk = pmp->pm_fatblk +
467 (pmp->pm_FATs * pmp->pm_FATsecs);
468 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
470 / DEV_BSIZE; /* in blocks */
471 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
474 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
476 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
478 #ifndef __DragonFly__
479 if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
480 if ((pmp->pm_maxcluster <= (0xff0 - 2))
481 && ((dtype == DTYPE_FLOPPY) || ((dtype == DTYPE_VNODE)
482 && ((pmp->pm_Heads == 1) || (pmp->pm_Heads == 2))))
484 pmp->pm_fatmask = FAT12_MASK;
488 pmp->pm_fatmask = FAT16_MASK;
494 if (pmp->pm_fatmask == 0) {
495 if (pmp->pm_maxcluster
496 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
498 * This will usually be a floppy disk. This size makes
499 * sure that one fat entry will not be split across
502 pmp->pm_fatmask = FAT12_MASK;
506 pmp->pm_fatmask = FAT16_MASK;
512 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
513 if (pmp->pm_maxcluster >= clusters) {
514 kprintf("Warning: number of clusters (%ld) exceeds FAT "
515 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
516 pmp->pm_maxcluster = clusters - 1;
521 pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
523 pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE;
525 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
526 pmp->pm_bnshift = DEV_BSHIFT;
529 * Compute mask and shift value for isolating cluster relative byte
530 * offsets and cluster numbers from a file offset.
532 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
533 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
534 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
537 * Check for valid cluster size
538 * must be a power of 2
540 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
546 * Release the bootsector buffer.
554 if (pmp->pm_fsinfo) {
557 if ((error = bread(devvp, de_bntodoff(pmp, pmp->pm_fsinfo), fsi_size(pmp), &bp)) != 0)
559 fp = (struct fsinfo *)bp->b_data;
560 if (!bcmp(fp->fsisig1, "RRaA", 4)
561 && !bcmp(fp->fsisig2, "rrAa", 4)
562 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)
563 && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) {
564 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
565 if (pmp->pm_nxtfree == 0xffffffff)
566 pmp->pm_nxtfree = CLUST_FIRST;
574 * Check and validate (or perhaps invalidate?) the fsinfo structure?
576 if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
578 "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n",
579 pmp->pm_nxtfree, pmp->pm_maxcluster);
585 * Allocate memory for the bitmap of allocated clusters, and then
588 pmp->pm_inusemap = kmalloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
590 * sizeof(*pmp->pm_inusemap),
591 M_MSDOSFSFAT, M_WAITOK);
594 * fillinusemap() needs pm_devvp.
597 pmp->pm_devvp = devvp;
600 * Have the inuse map filled in.
602 if ((error = fillinusemap(pmp)) != 0)
606 * If they want fat updates to be synchronous then let them suffer
607 * the performance degradation in exchange for the on disk copy of
608 * the fat being correct just about all the time. I suppose this
609 * would be a good thing to turn on if the kernel is still flakey.
611 if (mp->mnt_flag & MNT_SYNCHRONOUS)
612 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
618 pmp->pm_flags |= MSDOSFSMNT_RONLY;
621 mp->mnt_data = (qaddr_t) pmp;
622 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
623 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
624 mp->mnt_flag |= MNT_LOCAL;
625 vfs_add_vnodeops(mp, &msdosfs_vnode_vops, &mp->mnt_vn_norm_ops);
626 dev->si_mountpoint = mp;
633 VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE);
635 if (pmp->pm_inusemap)
636 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
637 kfree(pmp, M_MSDOSFSMNT);
638 mp->mnt_data = (qaddr_t)0;
644 * Unmount the filesystem described by mp.
647 msdosfs_unmount(struct mount *mp, int mntflags)
649 struct msdosfsmount *pmp;
653 if (mntflags & MNT_FORCE)
655 error = vflush(mp, 0, flags);
658 pmp = VFSTOMSDOSFS(mp);
659 pmp->pm_devvp->v_rdev->si_mountpoint = NULL;
662 struct vnode *vp = pmp->pm_devvp;
664 kprintf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
665 kprintf("flag %08x, sysrefs %d, writecount %d, auxrefs %d\n",
666 vp->v_flag, vp->v_sysref.refcnt,
667 vp->v_writecount, vp->v_auxrefs);
668 kprintf("mount %p, op %p\n", vp->v_mount, vp->v_ops);
669 kprintf("mount %p\n", vp->v_mount);
670 kprintf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
671 RB_ROOT(&vp->v_rbclean_tree),
672 RB_ROOT(&vp->v_rbdirty_tree),
673 vp->v_track_write.bk_active, vp->v_type);
674 kprintf("union %p, tag %d, data[0] %08x, data[1] %08x\n",
675 vp->v_socket, vp->v_tag,
676 ((u_int *)vp->v_data)[0],
677 ((u_int *)vp->v_data)[1]);
680 error = VOP_CLOSE(pmp->pm_devvp,
681 (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE);
682 vrele(pmp->pm_devvp);
683 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
684 kfree(pmp, M_MSDOSFSMNT);
685 mp->mnt_data = (qaddr_t)0;
686 mp->mnt_flag &= ~MNT_LOCAL;
691 msdosfs_root(struct mount *mp, struct vnode **vpp)
693 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
698 kprintf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
700 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
708 msdosfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
710 struct msdosfsmount *pmp;
712 pmp = VFSTOMSDOSFS(mp);
713 sbp->f_bsize = pmp->pm_bpcluster;
714 sbp->f_iosize = pmp->pm_bpcluster;
715 sbp->f_blocks = pmp->pm_maxcluster + 1;
716 sbp->f_bfree = pmp->pm_freeclustercount;
717 sbp->f_bavail = pmp->pm_freeclustercount;
718 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
719 sbp->f_ffree = 0; /* what to put in here? */
720 if (sbp != &mp->mnt_stat) {
721 sbp->f_type = mp->mnt_vfc->vfc_typenum;
722 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
724 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
734 static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data);
737 msdosfs_sync(struct mount *mp, int waitfor)
739 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
740 struct scaninfo scaninfo;
744 * If we ever switch to not updating all of the fats all the time,
745 * this would be the place to update them from the first one.
747 if (pmp->pm_fmod != 0) {
748 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
749 panic("msdosfs_sync: rofs mod");
751 /* update fats here */
755 * Write back each (modified) denode.
757 scaninfo.allerror = 0;
759 while (scaninfo.rescan) {
761 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, NULL, msdosfs_sync_scan, &scaninfo);
765 * Flush filesystem control info.
767 if (waitfor != MNT_LAZY) {
768 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
769 if ((error = VOP_FSYNC(pmp->pm_devvp, waitfor)) != 0)
770 scaninfo.allerror = error;
771 vn_unlock(pmp->pm_devvp);
773 return (scaninfo.allerror);
777 msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data)
779 struct scaninfo *info = data;
784 if (vp->v_type == VNON || vp->v_type == VBAD ||
786 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
787 (RB_EMPTY(&vp->v_rbdirty_tree) || info->waitfor == MNT_LAZY))) {
790 if ((error = VOP_FSYNC(vp, info->waitfor)) != 0)
791 info->allerror = error;
796 msdosfs_fhtovp(struct mount *mp, struct vnode *rootvp,
797 struct fid *fhp, struct vnode **vpp)
799 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
800 struct defid *defhp = (struct defid *) fhp;
804 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
814 msdosfs_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
815 struct ucred **credanonp)
817 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
820 np = vfs_export_lookup(mp, &pmp->pm_export, nam);
823 *exflagsp = np->netc_exflags;
824 *credanonp = &np->netc_anon;
829 msdosfs_vptofh(struct vnode *vp, struct fid *fhp)
835 defhp = (struct defid *)fhp;
836 defhp->defid_len = sizeof(struct defid);
837 defhp->defid_dirclust = dep->de_dirclust;
838 defhp->defid_dirofs = dep->de_diroffset;
839 /* defhp->defid_gen = dep->de_gen; */
843 static struct vfsops msdosfs_vfsops = {
844 .vfs_mount = msdosfs_mount,
845 .vfs_unmount = msdosfs_unmount,
846 .vfs_root = msdosfs_root,
847 .vfs_statfs = msdosfs_statfs,
848 .vfs_sync = msdosfs_sync,
849 .vfs_fhtovp = msdosfs_fhtovp,
850 .vfs_checkexp = msdosfs_checkexp,
851 .vfs_vptofh = msdosfs_vptofh,
852 .vfs_init = msdosfs_init,
853 .vfs_uninit = msdosfs_uninit
856 VFS_SET(msdosfs_vfsops, msdos, 0);