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 mountmsdosfs(struct vnode *devvp, struct mount *mp,
95 struct msdosfs_args *argp);
96 static int msdosfs_root(struct mount *, struct vnode **);
97 static int msdosfs_statfs(struct mount *, struct statfs *, struct ucred *);
98 static int msdosfs_unmount(struct mount *, int);
101 update_mp(struct mount *mp, struct msdosfs_args *argp)
103 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
105 char cs_local[ICONV_CSNMAXLEN];
106 char cs_dos[ICONV_CSNMAXLEN];
108 pmp->pm_gid = argp->gid;
109 pmp->pm_uid = argp->uid;
110 pmp->pm_mask = argp->mask & ALLPERMS;
111 pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT;
112 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
113 bcopy(argp->cs_local, cs_local, sizeof(cs_local));
114 bcopy(argp->cs_dos, cs_dos, sizeof(cs_dos));
115 kprintf("local: %s dos: %s\n",argp->cs_local, argp->cs_dos);
116 error = msdos_iconv->open(cs_local, ENCODING_UNICODE,
120 error = msdos_iconv->open(ENCODING_UNICODE, cs_local,
124 error = msdos_iconv->open(cs_dos, cs_local, &pmp->pm_u2d);
127 error = msdos_iconv->open(cs_local, cs_dos, &pmp->pm_d2u);
132 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
133 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
134 else if (!(pmp->pm_flags &
135 (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
136 struct vnode *rootvp;
139 * Try to divine whether to support Win'95 long filenames
142 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
144 if ((error = msdosfs_root(mp, &rootvp)) != 0)
146 pmp->pm_flags |= findwin95(VTODE(rootvp))
147 ? MSDOSFSMNT_LONGNAME : MSDOSFSMNT_SHORTNAME;
155 * mp - path - addr in user space of mount point (ie /usr or whatever)
156 * data - addr in user space of mount params including the name of the block
157 * special file to treat as a filesystem.
160 msdosfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
162 struct vnode *devvp; /* vnode for blk device to mount */
163 struct msdosfs_args args; /* will hold data from mount request */
164 /* msdosfs specific mount control block */
165 struct msdosfsmount *pmp = NULL;
169 struct nlookupdata nd;
171 error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args));
174 if (args.magic != MSDOSFS_ARGSMAGIC)
177 * If updating, check whether changing from read-only to
178 * read/write; if there is no device name, that's all we do.
180 if (mp->mnt_flag & MNT_UPDATE) {
181 pmp = VFSTOMSDOSFS(mp);
183 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
185 if (mp->mnt_flag & MNT_FORCE)
187 error = vflush(mp, 0, flags);
189 devvp = pmp->pm_devvp;
190 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
191 VOP_OPEN(devvp, FREAD, FSCRED, NULL);
192 VOP_CLOSE(devvp, FREAD|FWRITE, NULL);
194 pmp->pm_flags |= MSDOSFSMNT_RONLY;
197 if (!error && (mp->mnt_flag & MNT_RELOAD))
198 /* not yet implemented */
202 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
204 * If upgrade to read-write by non-root, then verify
205 * that user has necessary permissions on the device.
207 devvp = pmp->pm_devvp;
208 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
209 if (cred->cr_uid != 0) {
210 error = VOP_EACCESS(devvp, VREAD | VWRITE, cred);
216 VOP_OPEN(devvp, FREAD|FWRITE, FSCRED, NULL);
217 VOP_CLOSE(devvp, FREAD, NULL);
219 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
221 if (args.fspec == NULL) {
222 #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */
223 if (args.flags & MSDOSFSMNT_MNTOPT) {
224 pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
225 pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;
226 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
227 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
231 * Process export requests.
233 return (vfs_export(mp, &pmp->pm_export, &args.export));
237 * Not an update, or updating the name: look up the name
238 * and verify that it refers to a sensible block device.
241 error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW);
243 error = nlookup(&nd);
245 error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp);
250 if (!vn_isdisk(devvp, &error)) {
255 * If mount by non-root, then verify that user has necessary
256 * permissions on the device.
258 if (cred->cr_uid != 0) {
260 if ((mp->mnt_flag & MNT_RDONLY) == 0)
261 accessmode |= VWRITE;
262 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
263 error = VOP_EACCESS(devvp, accessmode, cred);
270 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
271 error = mountmsdosfs(devvp, mp, &args);
272 #ifdef MSDOSFS_DEBUG /* only needed for the kprintf below */
273 pmp = VFSTOMSDOSFS(mp);
276 if (devvp != pmp->pm_devvp)
277 error = EINVAL; /* XXX needs translation */
286 error = update_mp(mp, &args);
288 msdosfs_unmount(mp, MNT_FORCE);
292 copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
293 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
294 msdosfs_statfs(mp, &mp->mnt_stat, cred);
296 kprintf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
302 mountmsdosfs(struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp)
304 struct msdosfsmount *pmp;
307 union bootsector *bsp;
308 struct byte_bpb33 *b33;
309 struct byte_bpb50 *b50;
310 struct byte_bpb710 *b710;
311 u_int8_t SecPerClust;
316 * Disallow multiple mounts of the same device.
317 * Disallow mounting of a device that is currently in use
318 * Flush out any old buffers remaining from a previous use.
320 error = vfs_mountedon(devvp);
323 if (vcount(devvp) > 0)
325 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
326 error = vinvalbuf(devvp, V_SAVE, 0, 0);
331 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
332 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
333 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
338 bp = NULL; /* both used in error_exit */
342 * Read the boot sector of the filesystem, and then check the
343 * boot signature. If not a dos boot sector then error out.
345 * NOTE: 2048 is a maximum sector size in current...
347 error = bread(devvp, 0, 2048, &bp);
350 bp->b_flags |= B_AGE;
351 bsp = (union bootsector *)bp->b_data;
352 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
353 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
354 b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP;
356 #ifndef MSDOSFS_NOCHECKSIG
357 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
358 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
364 pmp = kmalloc(sizeof(*pmp), M_MSDOSFSMNT, M_WAITOK | M_ZERO);
368 * Compute several useful quantities from the bpb in the
369 * bootsector. Copy in the dos 5 variant of the bpb then fix up
370 * the fields that are different between dos 5 and dos 3.3.
372 SecPerClust = b50->bpbSecPerClust;
373 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
374 if (pmp->pm_BytesPerSec < DEV_BSIZE) {
378 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
379 pmp->pm_FATs = b50->bpbFATs;
380 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
381 pmp->pm_Sectors = getushort(b50->bpbSectors);
382 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
383 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
384 pmp->pm_Heads = getushort(b50->bpbHeads);
385 pmp->pm_Media = b50->bpbMedia;
387 /* calculate the ratio of sector size to DEV_BSIZE */
388 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
391 * We don't check pm_Heads nor pm_SecPerTrack, because
392 * these may not be set for EFI file systems. We don't
393 * use these anyway, so we're unaffected if they are
396 if (!pmp->pm_BytesPerSec || !SecPerClust) {
401 if (pmp->pm_Sectors == 0) {
402 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
403 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
405 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
406 pmp->pm_HugeSectors = pmp->pm_Sectors;
409 if (pmp->pm_RootDirEnts == 0) {
412 || getushort(b710->bpbFSVers)) {
414 kprintf("mountmsdosfs(): bad FAT32 filesystem\n");
417 pmp->pm_fatmask = FAT32_MASK;
420 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
421 if (getushort(b710->bpbExtFlags) & FATMIRROR)
422 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
424 pmp->pm_flags |= MSDOSFS_FATMIRROR;
426 pmp->pm_flags |= MSDOSFS_FATMIRROR;
429 * Check a few values (could do some more):
430 * - logical sector size: power of 2, >= block size
431 * - sectors per cluster: power of 2, >= 1
432 * - number of sectors: >= 1, <= size of partition
433 * - number of FAT sectors: >= 1
435 if ( (SecPerClust == 0)
436 || (SecPerClust & (SecPerClust - 1))
437 || (pmp->pm_BytesPerSec < DEV_BSIZE)
438 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
439 || (pmp->pm_HugeSectors == 0)
440 || (pmp->pm_FATsecs == 0)
441 || (SecPerClust * pmp->pm_BlkPerSec > MAXBSIZE / DEV_BSIZE)) {
446 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
447 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
448 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
449 SecPerClust *= pmp->pm_BlkPerSec;
451 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
454 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
455 pmp->pm_firstcluster = pmp->pm_fatblk
456 + (pmp->pm_FATs * pmp->pm_FATsecs);
457 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
459 pmp->pm_rootdirblk = pmp->pm_fatblk +
460 (pmp->pm_FATs * pmp->pm_FATsecs);
461 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts *
462 sizeof(struct direntry) + DEV_BSIZE - 1)
463 / DEV_BSIZE; /* in blocks */
464 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
467 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
469 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
471 if (pmp->pm_fatmask == 0) {
472 if (pmp->pm_maxcluster
473 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
475 * This will usually be a floppy disk. This size makes
476 * sure that one fat entry will not be split across
479 pmp->pm_fatmask = FAT12_MASK;
483 pmp->pm_fatmask = FAT16_MASK;
489 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
490 if (pmp->pm_maxcluster >= clusters) {
491 kprintf("Warning: number of clusters (%ld) exceeds FAT "
492 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
493 pmp->pm_maxcluster = clusters - 1;
497 pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
499 pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE;
501 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
502 pmp->pm_bnshift = DEV_BSHIFT;
505 * Compute mask and shift value for isolating cluster relative byte
506 * offsets and cluster numbers from a file offset.
508 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
509 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
510 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
513 * Check for valid cluster size
514 * must be a power of 2
516 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
522 * Release the bootsector buffer.
524 bp->b_flags |= B_RELBUF;
531 if (pmp->pm_fsinfo) {
534 if ((error = bread(devvp, de_bntodoff(pmp, pmp->pm_fsinfo),
535 fsi_size(pmp), &bp)) != 0)
537 fp = (struct fsinfo *)bp->b_data;
538 if (!bcmp(fp->fsisig1, "RRaA", 4) &&
539 !bcmp(fp->fsisig2, "rrAa", 4) &&
540 !bcmp(fp->fsisig3, "\0\0\125\252", 4) &&
541 !bcmp(fp->fsisig4, "\0\0\125\252", 4)) {
542 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
543 if (pmp->pm_nxtfree == (u_long)-1)
544 pmp->pm_nxtfree = CLUST_FIRST;
545 if (pmp->pm_nxtfree == (u_int)-1) {
546 kprintf("msdosfs_mount(): "
547 "ignoring illegal nxtfree 0x%016jx\n",
548 (uintmax_t)pmp->pm_nxtfree);
549 pmp->pm_nxtfree = CLUST_FIRST;
553 bp->b_flags |= B_RELBUF;
559 * Check and validate (or perhaps invalidate?) the fsinfo structure?
561 if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
563 "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n",
564 pmp->pm_nxtfree, pmp->pm_maxcluster);
570 * Allocate memory for the bitmap of allocated clusters, and then
573 pmp->pm_inusemap = kmalloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
574 / N_INUSEBITS) * sizeof(*pmp->pm_inusemap),
575 M_MSDOSFSFAT, M_WAITOK);
578 * fillinusemap() needs pm_devvp.
581 pmp->pm_devvp = devvp;
584 * Have the inuse map filled in.
586 if ((error = fillinusemap(pmp)) != 0)
590 * If they want fat updates to be synchronous then let them suffer
591 * the performance degradation in exchange for the on disk copy of
592 * the fat being correct just about all the time. I suppose this
593 * would be a good thing to turn on if the kernel is still flakey.
595 if (mp->mnt_flag & MNT_SYNCHRONOUS)
596 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
602 pmp->pm_flags |= MSDOSFSMNT_RONLY;
605 mp->mnt_data = (qaddr_t) pmp;
606 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
607 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
608 mp->mnt_flag |= MNT_LOCAL;
609 vfs_add_vnodeops(mp, &msdosfs_vnode_vops, &mp->mnt_vn_norm_ops);
610 dev->si_mountpoint = mp;
616 bp->b_flags |= B_RELBUF;
619 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
620 VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE, NULL);
623 if (pmp->pm_inusemap)
624 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
625 kfree(pmp, M_MSDOSFSMNT);
626 mp->mnt_data = (qaddr_t)0;
632 * Unmount the filesystem described by mp.
635 msdosfs_unmount(struct mount *mp, int mntflags)
637 struct msdosfsmount *pmp;
641 if (mntflags & MNT_FORCE)
643 error = vflush(mp, 0, flags);
646 pmp = VFSTOMSDOSFS(mp);
647 pmp->pm_devvp->v_rdev->si_mountpoint = NULL;
648 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdos_iconv) {
650 msdos_iconv->close(pmp->pm_w2u);
652 msdos_iconv->close(pmp->pm_u2w);
654 msdos_iconv->close(pmp->pm_d2u);
656 msdos_iconv->close(pmp->pm_u2d);
660 struct vnode *vp = pmp->pm_devvp;
662 kprintf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
663 kprintf("flag %08x, refcnt 0x%08x, writecount %d, "
665 vp->v_flag, vp->v_refcnt,
666 vp->v_writecount, vp->v_auxrefs);
667 kprintf("mount %p, op %p\n", vp->v_mount, vp->v_ops);
668 kprintf("mount %p\n", vp->v_mount);
669 kprintf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
670 RB_ROOT(&vp->v_rbclean_tree),
671 RB_ROOT(&vp->v_rbdirty_tree),
672 bio_track_active(&vp->v_track_write),
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 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
681 error = VOP_CLOSE(pmp->pm_devvp,
682 (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE,
684 vn_unlock(pmp->pm_devvp);
685 vrele(pmp->pm_devvp);
686 kfree(pmp->pm_inusemap, M_MSDOSFSFAT);
687 kfree(pmp, M_MSDOSFSMNT);
688 mp->mnt_data = (qaddr_t)0;
689 mp->mnt_flag &= ~MNT_LOCAL;
694 msdosfs_root(struct mount *mp, struct vnode **vpp)
696 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
701 kprintf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
703 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
711 msdosfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
713 struct msdosfsmount *pmp;
715 pmp = VFSTOMSDOSFS(mp);
716 sbp->f_bsize = pmp->pm_bpcluster;
717 sbp->f_iosize = pmp->pm_bpcluster;
718 sbp->f_blocks = pmp->pm_maxcluster + 1;
719 sbp->f_bfree = pmp->pm_freeclustercount;
720 sbp->f_bavail = pmp->pm_freeclustercount;
721 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
722 sbp->f_ffree = 0; /* what to put in here? */
723 if (sbp != &mp->mnt_stat) {
724 sbp->f_type = mp->mnt_vfc->vfc_typenum;
725 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
727 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
737 static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data);
740 msdosfs_sync(struct mount *mp, int waitfor)
742 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
743 struct scaninfo scaninfo;
747 * If we ever switch to not updating all of the fats all the time,
748 * this would be the place to update them from the first one.
750 if (pmp->pm_fmod != 0) {
751 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
752 panic("msdosfs_sync: rofs mod");
754 /* update fats here */
758 * Write back each (modified) denode.
760 scaninfo.allerror = 0;
762 while (scaninfo.rescan) {
764 vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, NULL,
765 msdosfs_sync_scan, &scaninfo);
769 * Flush filesystem control info.
771 if ((waitfor & MNT_LAZY) == 0) {
772 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
773 if ((error = VOP_FSYNC(pmp->pm_devvp, waitfor, 0)) != 0)
774 scaninfo.allerror = error;
775 vn_unlock(pmp->pm_devvp);
777 return (scaninfo.allerror);
781 msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data)
783 struct scaninfo *info = data;
788 if (vp->v_type == VNON || vp->v_type == VBAD ||
790 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
791 (RB_EMPTY(&vp->v_rbdirty_tree) || (info->waitfor & MNT_LAZY)))) {
794 if ((error = VOP_FSYNC(vp, info->waitfor, 0)) != 0)
795 info->allerror = error;
800 msdosfs_fhtovp(struct mount *mp, struct vnode *rootvp,
801 struct fid *fhp, struct vnode **vpp)
803 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
804 struct defid *defhp = (struct defid *) fhp;
808 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
818 msdosfs_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp,
819 struct ucred **credanonp)
821 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
824 np = vfs_export_lookup(mp, &pmp->pm_export, nam);
827 *exflagsp = np->netc_exflags;
828 *credanonp = &np->netc_anon;
833 msdosfs_vptofh(struct vnode *vp, struct fid *fhp)
839 defhp = (struct defid *)fhp;
840 defhp->defid_len = sizeof(struct defid);
841 defhp->defid_dirclust = dep->de_dirclust;
842 defhp->defid_dirofs = dep->de_diroffset;
843 /* defhp->defid_gen = dep->de_gen; */
847 static struct vfsops msdosfs_vfsops = {
848 .vfs_mount = msdosfs_mount,
849 .vfs_unmount = msdosfs_unmount,
850 .vfs_root = msdosfs_root,
851 .vfs_statfs = msdosfs_statfs,
852 .vfs_sync = msdosfs_sync,
853 .vfs_fhtovp = msdosfs_fhtovp,
854 .vfs_checkexp = msdosfs_checkexp,
855 .vfs_vptofh = msdosfs_vptofh,
856 .vfs_init = msdosfs_init,
857 .vfs_uninit = msdosfs_uninit
860 VFS_SET(msdosfs_vfsops, msdos, 0);
861 MODULE_VERSION(msdos, 1);