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 /* $NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $ */
5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by TooLs GmbH.
21 * 4. The name of TooLs GmbH may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
41 * This software is provided "as is".
43 * The author supplies this software to be publicly redistributed on the
44 * understanding that the author is not responsible for the correct
45 * functioning of this software in any circumstances and is not liable for
46 * any damages caused by this software.
51 #include <sys/param.h>
52 #include <sys/systm.h>
55 #include <sys/nlookup.h>
56 #include <sys/kernel.h>
57 #include <sys/vnode.h>
58 #include <sys/iconv.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>
72 #include "msdosfsmount.h"
75 extern struct vop_ops msdosfs_vnode_vops;
76 struct iconv_functions *msdos_iconv;
78 #define MSDOSFS_DFLTBSIZE 4096
79 #define ENCODING_UNICODE "UTF-16BE"
82 * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
83 * garbage or a random value :-{
84 * If you want to use that broken-signatured media, define the
85 * following symbol even though PC/AT.
86 * (ex. mount PC-98 DOS formatted FD on PC/AT)
88 #define MSDOSFS_NOCHECKSIG
91 MALLOC_DEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOSFS mount structure");
92 static MALLOC_DEFINE(M_MSDOSFSFAT, "MSDOSFS FAT", "MSDOSFS file allocation table");
94 static int update_mp (struct mount *mp, struct msdosfs_args *argp);
95 static int mountmsdosfs (struct vnode *devvp, struct mount *mp,
96 struct msdosfs_args *argp);
97 static int msdosfs_fhtovp (struct mount *, struct vnode *,
98 struct fid *, struct vnode **);
99 static int msdosfs_checkexp (struct mount *, struct sockaddr *,
100 int *, struct ucred **);
101 static int msdosfs_mount (struct mount *, char *, caddr_t,
103 static int msdosfs_root (struct mount *, struct vnode **);
104 static int msdosfs_statfs (struct mount *, struct statfs *,
106 static int msdosfs_sync (struct mount *, int);
107 static int msdosfs_unmount (struct mount *, int);
108 static int msdosfs_vptofh (struct vnode *, struct fid *);
111 update_mp(struct mount *mp, struct msdosfs_args *argp)
113 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
115 char cs_local[ICONV_CSNMAXLEN];
116 char cs_dos[ICONV_CSNMAXLEN];
118 pmp->pm_gid = argp->gid;
119 pmp->pm_uid = argp->uid;
120 pmp->pm_mask = argp->mask & ALLPERMS;
121 pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT;
122 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
123 bcopy(argp->cs_local, cs_local, sizeof(cs_local));
124 bcopy(argp->cs_dos, cs_dos, sizeof(cs_dos));
125 kprintf("local: %s dos: %s\n",argp->cs_local, argp->cs_dos);
126 error = msdos_iconv->open(cs_local, ENCODING_UNICODE, &pmp->pm_w2u);
129 error = msdos_iconv->open(ENCODING_UNICODE, cs_local, &pmp->pm_u2w);
132 error = msdos_iconv->open(cs_dos, cs_local, &pmp->pm_u2d);
135 error = msdos_iconv->open(cs_local, cs_dos, &pmp->pm_d2u);
140 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
141 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
142 else if (!(pmp->pm_flags &
143 (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
144 struct vnode *rootvp;
147 * Try to divine whether to support Win'95 long filenames
150 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
152 if ((error = msdosfs_root(mp, &rootvp)) != 0)
154 pmp->pm_flags |= findwin95(VTODE(rootvp))
155 ? MSDOSFSMNT_LONGNAME
156 : MSDOSFSMNT_SHORTNAME;
164 * mp - path - addr in user space of mount point (ie /usr or whatever)
165 * data - addr in user space of mount params including the name of the block
166 * special file to treat as a filesystem.
169 msdosfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
171 struct vnode *devvp; /* vnode for blk device to mount */
172 struct msdosfs_args args; /* will hold data from mount request */
173 /* msdosfs specific mount control block */
174 struct msdosfsmount *pmp = NULL;
178 struct nlookupdata nd;
180 error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args));
183 if (args.magic != MSDOSFS_ARGSMAGIC)
186 * If updating, check whether changing from read-only to
187 * read/write; if there is no device name, that's all we do.
189 if (mp->mnt_flag & MNT_UPDATE) {
190 pmp = VFSTOMSDOSFS(mp);
192 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
194 if (mp->mnt_flag & MNT_FORCE)
196 error = vflush(mp, 0, flags);
198 devvp = pmp->pm_devvp;
199 VOP_OPEN(devvp, FREAD, FSCRED, NULL);
200 VOP_CLOSE(devvp, FREAD|FWRITE);
201 pmp->pm_flags |= MSDOSFSMNT_RONLY;
204 if (!error && (mp->mnt_flag & MNT_RELOAD))
205 /* not yet implemented */
209 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
211 * If upgrade to read-write by non-root, then verify
212 * that user has necessary permissions on the device.
214 devvp = pmp->pm_devvp;
215 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
216 if (cred->cr_uid != 0) {
217 error = VOP_EACCESS(devvp, VREAD | VWRITE, cred);
223 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL);
224 VOP_CLOSE(devvp, FREAD);
226 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
228 if (args.fspec == NULL) {
229 #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */
230 if (args.flags & MSDOSFSMNT_MNTOPT) {
231 pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
232 pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;
233 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
234 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
238 * Process export requests.
240 return (vfs_export(mp, &pmp->pm_export, &args.export));
244 * Not an update, or updating the name: look up the name
245 * and verify that it refers to a sensible block device.
248 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
250 error = nlookup(&nd);
252 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
257 if (!vn_isdisk(devvp, &error)) {
262 * If mount by non-root, then verify that user has necessary
263 * permissions on the device.
265 if (cred->cr_uid != 0) {
267 if ((mp->mnt_flag & MNT_RDONLY) == 0)
268 accessmode |= VWRITE;
269 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
270 error = VOP_EACCESS(devvp, accessmode, cred);
277 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
278 error = mountmsdosfs(devvp, mp, &args);
279 #ifdef MSDOSFS_DEBUG /* only needed for the kprintf below */
280 pmp = VFSTOMSDOSFS(mp);
283 if (devvp != pmp->pm_devvp)
284 error = EINVAL; /* XXX needs translation */
293 error = update_mp(mp, &args);
295 msdosfs_unmount(mp, MNT_FORCE);
299 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
300 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
301 msdosfs_statfs(mp, &mp->mnt_stat, cred);
303 kprintf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
309 mountmsdosfs(struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp)
311 struct msdosfsmount *pmp;
314 union bootsector *bsp;
315 struct byte_bpb33 *b33;
316 struct byte_bpb50 *b50;
317 struct byte_bpb710 *b710;
318 u_int8_t SecPerClust;
323 * Disallow multiple mounts of the same device.
324 * Disallow mounting of a device that is currently in use
325 * Flush out any old buffers remaining from a previous use.
327 error = vfs_mountedon(devvp);
330 if (vcount(devvp) > 0)
332 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
333 error = vinvalbuf(devvp, V_SAVE, 0, 0);
338 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
339 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
340 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
345 bp = NULL; /* both used in error_exit */
349 * Read the boot sector of the filesystem, and then check the
350 * boot signature. If not a dos boot sector then error out.
352 * NOTE: 2048 is a maximum sector size in current...
354 error = bread(devvp, 0, 2048, &bp);
357 bp->b_flags |= B_AGE;
358 bsp = (union bootsector *)bp->b_data;
359 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
360 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
361 b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP;
363 #ifndef MSDOSFS_NOCHECKSIG
364 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
365 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
371 pmp = kmalloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO);
375 * Compute several useful quantities from the bpb in the
376 * bootsector. Copy in the dos 5 variant of the bpb then fix up
377 * the fields that are different between dos 5 and dos 3.3.
379 SecPerClust = b50->bpbSecPerClust;
380 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
381 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
382 pmp->pm_FATs = b50->bpbFATs;
383 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
384 pmp->pm_Sectors = getushort(b50->bpbSectors);
385 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
386 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
387 pmp->pm_Heads = getushort(b50->bpbHeads);
388 pmp->pm_Media = b50->bpbMedia;
390 /* calculate the ratio of sector size to DEV_BSIZE */
391 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
394 * We don't check pm_Heads nor pm_SecPerTrack, because
395 * these may not be set for EFI file systems. We don't
396 * use these anyway, so we're unaffected if they are
399 if (!pmp->pm_BytesPerSec || !SecPerClust) {
404 if (pmp->pm_Sectors == 0) {
405 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
406 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
408 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
409 pmp->pm_HugeSectors = pmp->pm_Sectors;
412 if (pmp->pm_RootDirEnts == 0) {
415 || getushort(b710->bpbFSVers)) {
417 kprintf("mountmsdosfs(): bad FAT32 filesystem\n");
420 pmp->pm_fatmask = FAT32_MASK;
423 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
424 if (getushort(b710->bpbExtFlags) & FATMIRROR)
425 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
427 pmp->pm_flags |= MSDOSFS_FATMIRROR;
429 pmp->pm_flags |= MSDOSFS_FATMIRROR;
432 * Check a few values (could do some more):
433 * - logical sector size: power of 2, >= block size
434 * - sectors per cluster: power of 2, >= 1
435 * - number of sectors: >= 1, <= size of partition
437 if ( (SecPerClust == 0)
438 || (SecPerClust & (SecPerClust - 1))
439 || (pmp->pm_BytesPerSec < DEV_BSIZE)
440 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
441 || (pmp->pm_HugeSectors == 0)
447 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
448 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
449 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
450 SecPerClust *= pmp->pm_BlkPerSec;
452 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
455 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
456 pmp->pm_firstcluster = pmp->pm_fatblk
457 + (pmp->pm_FATs * pmp->pm_FATsecs);
458 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
460 pmp->pm_rootdirblk = pmp->pm_fatblk +
461 (pmp->pm_FATs * pmp->pm_FATsecs);
462 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
464 / DEV_BSIZE; /* in blocks */
465 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
468 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
470 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
472 if (pmp->pm_fatmask == 0) {
473 if (pmp->pm_maxcluster
474 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
476 * This will usually be a floppy disk. This size makes
477 * sure that one fat entry will not be split across
480 pmp->pm_fatmask = FAT12_MASK;
484 pmp->pm_fatmask = FAT16_MASK;
490 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
491 if (pmp->pm_maxcluster >= clusters) {
492 kprintf("Warning: number of clusters (%ld) exceeds FAT "
493 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
494 pmp->pm_maxcluster = clusters - 1;
499 pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
501 pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE;
503 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
504 pmp->pm_bnshift = DEV_BSHIFT;
507 * Compute mask and shift value for isolating cluster relative byte
508 * offsets and cluster numbers from a file offset.
510 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
511 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
512 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
515 * Check for valid cluster size
516 * must be a power of 2
518 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
524 * Release the bootsector buffer.
526 bp->b_flags |= B_RELBUF;
533 if (pmp->pm_fsinfo) {
536 if ((error = bread(devvp, de_bntodoff(pmp, pmp->pm_fsinfo), fsi_size(pmp), &bp)) != 0)
538 fp = (struct fsinfo *)bp->b_data;
539 if (!bcmp(fp->fsisig1, "RRaA", 4)
540 && !bcmp(fp->fsisig2, "rrAa", 4)
541 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)
542 && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) {
543 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
544 if (pmp->pm_nxtfree == (u_long) -1)
545 pmp->pm_nxtfree = CLUST_FIRST;
548 bp->b_flags |= B_RELBUF;
554 * Check and validate (or perhaps invalidate?) the fsinfo structure?
556 if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
558 "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n",
559 pmp->pm_nxtfree, pmp->pm_maxcluster);
565 * Allocate memory for the bitmap of allocated clusters, and then
568 pmp->pm_inusemap = kmalloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
570 * sizeof(*pmp->pm_inusemap),
571 M_MSDOSFSFAT, M_WAITOK);
574 * fillinusemap() needs pm_devvp.
577 pmp->pm_devvp = devvp;
580 * Have the inuse map filled in.
582 if ((error = fillinusemap(pmp)) != 0)
586 * If they want fat updates to be synchronous then let them suffer
587 * the performance degradation in exchange for the on disk copy of
588 * the fat being correct just about all the time. I suppose this
589 * would be a good thing to turn on if the kernel is still flakey.
591 if (mp->mnt_flag & MNT_SYNCHRONOUS)
592 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
598 pmp->pm_flags |= MSDOSFSMNT_RONLY;
601 mp->mnt_data = (qaddr_t) pmp;
602 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
603 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
604 mp->mnt_flag |= MNT_LOCAL;
605 vfs_add_vnodeops(mp, &msdosfs_vnode_vops, &mp->mnt_vn_norm_ops);
606 dev->si_mountpoint = mp;
612 bp->b_flags |= B_RELBUF;
615 VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE);
617 if (pmp->pm_inusemap)
618 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
619 kfree(pmp, M_MSDOSFSMNT);
620 mp->mnt_data = (qaddr_t)0;
626 * Unmount the filesystem described by mp.
629 msdosfs_unmount(struct mount *mp, int mntflags)
631 struct msdosfsmount *pmp;
635 if (mntflags & MNT_FORCE)
637 error = vflush(mp, 0, flags);
640 pmp = VFSTOMSDOSFS(mp);
641 pmp->pm_devvp->v_rdev->si_mountpoint = NULL;
642 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
644 msdos_iconv->close(pmp->pm_w2u);
646 msdos_iconv->close(pmp->pm_u2w);
648 msdos_iconv->close(pmp->pm_d2u);
650 msdos_iconv->close(pmp->pm_u2d);
654 struct vnode *vp = pmp->pm_devvp;
656 kprintf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
657 kprintf("flag %08x, sysrefs %d, writecount %d, auxrefs %d\n",
658 vp->v_flag, vp->v_sysref.refcnt,
659 vp->v_writecount, vp->v_auxrefs);
660 kprintf("mount %p, op %p\n", vp->v_mount, vp->v_ops);
661 kprintf("mount %p\n", vp->v_mount);
662 kprintf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
663 RB_ROOT(&vp->v_rbclean_tree),
664 RB_ROOT(&vp->v_rbdirty_tree),
665 bio_track_active(&vp->v_track_write),
667 kprintf("union %p, tag %d, data[0] %08x, data[1] %08x\n",
668 vp->v_socket, vp->v_tag,
669 ((u_int *)vp->v_data)[0],
670 ((u_int *)vp->v_data)[1]);
673 error = VOP_CLOSE(pmp->pm_devvp,
674 (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE);
675 vrele(pmp->pm_devvp);
676 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
677 kfree(pmp, M_MSDOSFSMNT);
678 mp->mnt_data = (qaddr_t)0;
679 mp->mnt_flag &= ~MNT_LOCAL;
684 msdosfs_root(struct mount *mp, struct vnode **vpp)
686 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
691 kprintf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
693 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
701 msdosfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
703 struct msdosfsmount *pmp;
705 pmp = VFSTOMSDOSFS(mp);
706 sbp->f_bsize = pmp->pm_bpcluster;
707 sbp->f_iosize = pmp->pm_bpcluster;
708 sbp->f_blocks = pmp->pm_maxcluster + 1;
709 sbp->f_bfree = pmp->pm_freeclustercount;
710 sbp->f_bavail = pmp->pm_freeclustercount;
711 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
712 sbp->f_ffree = 0; /* what to put in here? */
713 if (sbp != &mp->mnt_stat) {
714 sbp->f_type = mp->mnt_vfc->vfc_typenum;
715 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
717 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
727 static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data);
730 msdosfs_sync(struct mount *mp, int waitfor)
732 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
733 struct scaninfo scaninfo;
737 * If we ever switch to not updating all of the fats all the time,
738 * this would be the place to update them from the first one.
740 if (pmp->pm_fmod != 0) {
741 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
742 panic("msdosfs_sync: rofs mod");
744 /* update fats here */
748 * Write back each (modified) denode.
750 scaninfo.allerror = 0;
752 while (scaninfo.rescan) {
754 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, NULL, msdosfs_sync_scan, &scaninfo);
758 * Flush filesystem control info.
760 if ((waitfor & MNT_LAZY) == 0) {
761 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
762 if ((error = VOP_FSYNC(pmp->pm_devvp, waitfor, 0)) != 0)
763 scaninfo.allerror = error;
764 vn_unlock(pmp->pm_devvp);
766 return (scaninfo.allerror);
770 msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data)
772 struct scaninfo *info = data;
777 if (vp->v_type == VNON || vp->v_type == VBAD ||
779 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
780 (RB_EMPTY(&vp->v_rbdirty_tree) || (info->waitfor & MNT_LAZY)))) {
783 if ((error = VOP_FSYNC(vp, info->waitfor, 0)) != 0)
784 info->allerror = error;
789 msdosfs_fhtovp(struct mount *mp, struct vnode *rootvp,
790 struct fid *fhp, struct vnode **vpp)
792 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
793 struct defid *defhp = (struct defid *) fhp;
797 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
807 msdosfs_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
808 struct ucred **credanonp)
810 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
813 np = vfs_export_lookup(mp, &pmp->pm_export, nam);
816 *exflagsp = np->netc_exflags;
817 *credanonp = &np->netc_anon;
822 msdosfs_vptofh(struct vnode *vp, struct fid *fhp)
828 defhp = (struct defid *)fhp;
829 defhp->defid_len = sizeof(struct defid);
830 defhp->defid_dirclust = dep->de_dirclust;
831 defhp->defid_dirofs = dep->de_diroffset;
832 /* defhp->defid_gen = dep->de_gen; */
836 static struct vfsops msdosfs_vfsops = {
837 .vfs_mount = msdosfs_mount,
838 .vfs_unmount = msdosfs_unmount,
839 .vfs_root = msdosfs_root,
840 .vfs_statfs = msdosfs_statfs,
841 .vfs_sync = msdosfs_sync,
842 .vfs_fhtovp = msdosfs_fhtovp,
843 .vfs_checkexp = msdosfs_checkexp,
844 .vfs_vptofh = msdosfs_vptofh,
845 .vfs_init = msdosfs_init,
846 .vfs_uninit = msdosfs_uninit
849 VFS_SET(msdosfs_vfsops, msdos, 0);
850 MODULE_VERSION(msdos, 1);