1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vfsops.c,v 1.60.2.6 2002/09/12 21:33:38 trhodes 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>
54 #include <sys/namei.h>
56 #include <sys/kernel.h>
57 #include <sys/vnode.h>
58 #include <sys/mount.h>
60 #include <sys/fcntl.h>
61 #include <sys/malloc.h>
62 #include <sys/stat.h> /* defines ALLPERMS */
63 #include <vm/vm_zone.h>
65 #include <msdosfs/bpb.h>
66 #include <msdosfs/bootsect.h>
67 #include <msdosfs/direntry.h>
68 #include <msdosfs/denode.h>
69 #include <msdosfs/msdosfsmount.h>
70 #include <msdosfs/fat.h>
72 #define MSDOSFS_DFLTBSIZE 4096
76 * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
77 * garbage or a random value :-{
78 * If you want to use that broken-signatured media, define the
79 * following symbol even though PC/AT.
80 * (ex. mount PC-98 DOS formatted FD on PC/AT)
82 #define MSDOSFS_NOCHECKSIG
85 MALLOC_DEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOSFS mount structure");
86 static MALLOC_DEFINE(M_MSDOSFSFAT, "MSDOSFS FAT", "MSDOSFS file allocation table");
88 static int update_mp __P((struct mount *mp, struct msdosfs_args *argp));
89 static int mountmsdosfs __P((struct vnode *devvp, struct mount *mp,
90 struct proc *p, struct msdosfs_args *argp));
91 static int msdosfs_fhtovp __P((struct mount *, struct fid *,
93 static int msdosfs_checkexp __P((struct mount *, struct sockaddr *,
94 int *, struct ucred **));
95 static int msdosfs_mount __P((struct mount *, char *, caddr_t,
96 struct nameidata *, struct proc *));
97 static int msdosfs_root __P((struct mount *, struct vnode **));
98 static int msdosfs_statfs __P((struct mount *, struct statfs *,
100 static int msdosfs_sync __P((struct mount *, int, struct ucred *,
102 static int msdosfs_unmount __P((struct mount *, int, struct proc *));
103 static int msdosfs_vptofh __P((struct vnode *, struct fid *));
108 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));
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;
162 register struct mount *mp;
163 struct proc *p = curproc; /* XXX */
166 struct msdosfs_args args;
168 if (root_device->dv_class != DV_DISK)
172 * Get vnodes for swapdev and rootdev.
174 if (bdevvp(rootdev, &rootvp))
175 panic("msdosfs_mountroot: can't setup rootvp");
177 mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
178 bzero((char *)mp, (u_long)sizeof(struct mount));
179 mp->mnt_op = &msdosfs_vfsops;
181 TAILQ_INIT(&mp->mnt_nvnodelist);
182 TAILQ_INIT(&mp->mnt_reservedvnlist);
189 if ((error = mountmsdosfs(rootvp, mp, p, &args)) != 0) {
194 if ((error = update_mp(mp, &args)) != 0) {
195 (void)msdosfs_unmount(mp, 0, p);
200 if ((error = vfs_lock(mp)) != 0) {
201 (void)msdosfs_unmount(mp, 0, p);
206 TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
207 mp->mnt_vnodecovered = NULLVP;
208 (void) copystr("/", mp->mnt_stat.f_mntonname, MNAMELEN - 1,
210 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
211 (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
213 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
214 (void)msdosfs_statfs(mp, &mp->mnt_stat, p);
221 * mp - path - addr in user space of mount point (ie /usr or whatever)
222 * data - addr in user space of mount params including the name of the block
223 * special file to treat as a filesystem.
226 msdosfs_mount(mp, path, data, ndp, p)
230 struct nameidata *ndp;
233 struct vnode *devvp; /* vnode for blk device to mount */
234 struct msdosfs_args args; /* will hold data from mount request */
235 /* msdosfs specific mount control block */
236 struct msdosfsmount *pmp = NULL;
241 error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args));
244 if (args.magic != MSDOSFS_ARGSMAGIC)
247 * If updating, check whether changing from read-only to
248 * read/write; if there is no device name, that's all we do.
250 if (mp->mnt_flag & MNT_UPDATE) {
251 pmp = VFSTOMSDOSFS(mp);
253 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) {
255 if (mp->mnt_flag & MNT_FORCE)
257 error = vflush(mp, 0, flags);
259 if (!error && (mp->mnt_flag & MNT_RELOAD))
260 /* not yet implemented */
264 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) {
266 * If upgrade to read-write by non-root, then verify
267 * that user has necessary permissions on the device.
269 if (p->p_ucred->cr_uid != 0) {
270 devvp = pmp->pm_devvp;
271 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
272 error = VOP_ACCESS(devvp, VREAD | VWRITE,
275 VOP_UNLOCK(devvp, 0, p);
278 VOP_UNLOCK(devvp, 0, p);
280 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
282 if (args.fspec == 0) {
283 #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */
284 if (args.flags & MSDOSFSMNT_MNTOPT) {
285 pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
286 pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;
287 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
288 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
292 * Process export requests.
294 return (vfs_export(mp, &pmp->pm_export, &args.export));
298 * Not an update, or updating the name: look up the name
299 * and verify that it refers to a sensible block device.
301 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
306 NDFREE(ndp, NDF_ONLY_PNBUF);
308 if (!vn_isdisk(devvp, &error)) {
313 * If mount by non-root, then verify that user has necessary
314 * permissions on the device.
316 if (p->p_ucred->cr_uid != 0) {
318 if ((mp->mnt_flag & MNT_RDONLY) == 0)
319 accessmode |= VWRITE;
320 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
321 error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p);
326 VOP_UNLOCK(devvp, 0, p);
328 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
329 error = mountmsdosfs(devvp, mp, p, &args);
330 #ifdef MSDOSFS_DEBUG /* only needed for the printf below */
331 pmp = VFSTOMSDOSFS(mp);
334 if (devvp != pmp->pm_devvp)
335 error = EINVAL; /* XXX needs translation */
344 error = update_mp(mp, &args);
346 msdosfs_unmount(mp, MNT_FORCE, p);
350 (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
351 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
352 (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
354 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
355 (void) msdosfs_statfs(mp, &mp->mnt_stat, p);
357 printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
363 mountmsdosfs(devvp, mp, p, argp)
367 struct msdosfs_args *argp;
369 struct msdosfsmount *pmp;
371 dev_t dev = devvp->v_rdev;
373 struct partinfo dpart;
374 int bsize = 0, dtype = 0, tmp;
376 union bootsector *bsp;
377 struct byte_bpb33 *b33;
378 struct byte_bpb50 *b50;
379 struct byte_bpb710 *b710;
380 u_int8_t SecPerClust;
385 * Disallow multiple mounts of the same device.
386 * Disallow mounting of a device that is currently in use
387 * (except for root, which might share swap device for miniroot).
388 * Flush out any old buffers remaining from a previous use.
390 error = vfs_mountedon(devvp);
393 if (vcount(devvp) > 1 && devvp != rootvp)
395 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
396 error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
397 VOP_UNLOCK(devvp, 0, p);
401 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
402 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
403 error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
404 VOP_UNLOCK(devvp, 0, p);
408 bp = NULL; /* both used in error_exit */
412 if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
414 * We need the disklabel to calculate the size of a FAT entry
415 * later on. Also make sure the partition contains a filesystem
416 * of type FS_MSDOS. This doesn't work for floppies, so we have
417 * to check for them too.
419 * At least some parts of the msdos fs driver seem to assume
420 * that the size of a disk block will always be 512 bytes.
423 error = VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart,
427 tmp = dpart.part->p_fstype;
428 dtype = dpart.disklab->d_type;
429 bsize = dpart.disklab->d_secsize;
430 if (bsize != 512 || (dtype!=DTYPE_FLOPPY && tmp!=FS_MSDOS)) {
438 * Read the boot sector of the filesystem, and then check the
439 * boot signature. If not a dos boot sector then error out.
441 * NOTE: 2048 is a maximum sector size in current...
443 error = bread(devvp, 0, 2048, NOCRED, &bp);
446 bp->b_flags |= B_AGE;
447 bsp = (union bootsector *)bp->b_data;
448 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
449 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
450 b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP;
453 if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
455 #ifndef MSDOSFS_NOCHECKSIG
456 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
457 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
466 pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK);
467 bzero((caddr_t)pmp, sizeof *pmp);
471 * Compute several useful quantities from the bpb in the
472 * bootsector. Copy in the dos 5 variant of the bpb then fix up
473 * the fields that are different between dos 5 and dos 3.3.
475 SecPerClust = b50->bpbSecPerClust;
476 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
477 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
478 pmp->pm_FATs = b50->bpbFATs;
479 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
480 pmp->pm_Sectors = getushort(b50->bpbSectors);
481 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
482 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
483 pmp->pm_Heads = getushort(b50->bpbHeads);
484 pmp->pm_Media = b50->bpbMedia;
486 /* calculate the ratio of sector size to DEV_BSIZE */
487 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
490 if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) {
492 /* XXX - We should probably check more values here */
493 if (!pmp->pm_BytesPerSec || !SecPerClust
494 || !pmp->pm_Heads || pmp->pm_Heads > 255
496 || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) {
498 || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) {
507 if (pmp->pm_Sectors == 0) {
508 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
509 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
511 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
512 pmp->pm_HugeSectors = pmp->pm_Sectors;
514 if (pmp->pm_HugeSectors > 0xffffffff /
515 (pmp->pm_BytesPerSec / sizeof(struct direntry)) + 1) {
517 * We cannot deal currently with this size of disk
518 * due to fileid limitations (see msdosfs_getattr and
522 printf("mountmsdosfs(): disk too big, sorry\n");
526 if (pmp->pm_RootDirEnts == 0) {
527 if (bsp->bs710.bsBootSectSig2 != BOOTSIG2
528 || bsp->bs710.bsBootSectSig3 != BOOTSIG3
531 || getushort(b710->bpbFSVers)) {
533 printf("mountmsdosfs(): bad FAT32 filesystem\n");
536 pmp->pm_fatmask = FAT32_MASK;
539 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
540 if (getushort(b710->bpbExtFlags) & FATMIRROR)
541 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
543 pmp->pm_flags |= MSDOSFS_FATMIRROR;
545 pmp->pm_flags |= MSDOSFS_FATMIRROR;
548 * Check a few values (could do some more):
549 * - logical sector size: power of 2, >= block size
550 * - sectors per cluster: power of 2, >= 1
551 * - number of sectors: >= 1, <= size of partition
553 if ( (SecPerClust == 0)
554 || (SecPerClust & (SecPerClust - 1))
555 || (pmp->pm_BytesPerSec < DEV_BSIZE)
556 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
557 || (pmp->pm_HugeSectors == 0)
563 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
564 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
565 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
566 SecPerClust *= pmp->pm_BlkPerSec;
568 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
571 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
572 pmp->pm_firstcluster = pmp->pm_fatblk
573 + (pmp->pm_FATs * pmp->pm_FATsecs);
574 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
576 pmp->pm_rootdirblk = pmp->pm_fatblk +
577 (pmp->pm_FATs * pmp->pm_FATsecs);
578 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
580 / DEV_BSIZE; /* in blocks */
581 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
584 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
586 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
589 if (argp->flags & MSDOSFSMNT_GEMDOSFS) {
590 if ((pmp->pm_maxcluster <= (0xff0 - 2))
591 && ((dtype == DTYPE_FLOPPY) || ((dtype == DTYPE_VNODE)
592 && ((pmp->pm_Heads == 1) || (pmp->pm_Heads == 2))))
594 pmp->pm_fatmask = FAT12_MASK;
598 pmp->pm_fatmask = FAT16_MASK;
604 if (pmp->pm_fatmask == 0) {
605 if (pmp->pm_maxcluster
606 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
608 * This will usually be a floppy disk. This size makes
609 * sure that one fat entry will not be split across
612 pmp->pm_fatmask = FAT12_MASK;
616 pmp->pm_fatmask = FAT16_MASK;
622 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
623 if (pmp->pm_maxcluster >= clusters) {
624 printf("Warning: number of clusters (%ld) exceeds FAT "
625 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
626 pmp->pm_maxcluster = clusters - 1;
631 pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
633 pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE;
635 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
636 pmp->pm_bnshift = ffs(DEV_BSIZE) - 1;
639 * Compute mask and shift value for isolating cluster relative byte
640 * offsets and cluster numbers from a file offset.
642 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
643 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
644 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
647 * Check for valid cluster size
648 * must be a power of 2
650 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
656 * Release the bootsector buffer.
664 if (pmp->pm_fsinfo) {
667 if ((error = bread(devvp, pmp->pm_fsinfo, fsi_size(pmp),
670 fp = (struct fsinfo *)bp->b_data;
671 if (!bcmp(fp->fsisig1, "RRaA", 4)
672 && !bcmp(fp->fsisig2, "rrAa", 4)
673 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)
674 && !bcmp(fp->fsisig4, "\0\0\125\252", 4))
675 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
683 * Check and validate (or perhaps invalidate?) the fsinfo structure?
685 if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
687 "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n",
688 pmp->pm_nxtfree, pmp->pm_maxcluster);
694 * Allocate memory for the bitmap of allocated clusters, and then
697 pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
699 * sizeof(*pmp->pm_inusemap),
700 M_MSDOSFSFAT, M_WAITOK);
703 * fillinusemap() needs pm_devvp.
706 pmp->pm_devvp = devvp;
709 * Have the inuse map filled in.
711 if ((error = fillinusemap(pmp)) != 0)
715 * If they want fat updates to be synchronous then let them suffer
716 * the performance degradation in exchange for the on disk copy of
717 * the fat being correct just about all the time. I suppose this
718 * would be a good thing to turn on if the kernel is still flakey.
720 if (mp->mnt_flag & MNT_SYNCHRONOUS)
721 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
727 pmp->pm_flags |= MSDOSFSMNT_RONLY;
730 mp->mnt_data = (qaddr_t) pmp;
731 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
732 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
733 mp->mnt_flag |= MNT_LOCAL;
734 devvp->v_specmountpoint = mp;
741 (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE, NOCRED, p);
743 if (pmp->pm_inusemap)
744 free(pmp->pm_inusemap, M_MSDOSFSFAT);
745 free(pmp, M_MSDOSFSMNT);
746 mp->mnt_data = (qaddr_t)0;
752 * Unmount the filesystem described by mp.
755 msdosfs_unmount(mp, mntflags, p)
760 struct msdosfsmount *pmp;
764 if (mntflags & MNT_FORCE)
766 error = vflush(mp, 0, flags);
769 pmp = VFSTOMSDOSFS(mp);
770 pmp->pm_devvp->v_specmountpoint = NULL;
773 struct vnode *vp = pmp->pm_devvp;
775 printf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
776 printf("flag %08lx, usecount %d, writecount %d, holdcnt %ld\n",
777 vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt);
778 printf("id %lu, mount %p, op %p\n",
779 vp->v_id, vp->v_mount, vp->v_op);
780 printf("freef %p, freeb %p, mount %p\n",
781 vp->v_freelist.tqe_next, vp->v_freelist.tqe_prev,
783 printf("cleanblkhd %p, dirtyblkhd %p, numoutput %ld, type %d\n",
784 TAILQ_FIRST(&vp->v_cleanblkhd),
785 TAILQ_FIRST(&vp->v_dirtyblkhd),
786 vp->v_numoutput, vp->v_type);
787 printf("union %p, tag %d, data[0] %08x, data[1] %08x\n",
788 vp->v_socket, vp->v_tag,
789 ((u_int *)vp->v_data)[0],
790 ((u_int *)vp->v_data)[1]);
793 error = VOP_CLOSE(pmp->pm_devvp,
794 (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE,
796 vrele(pmp->pm_devvp);
797 free(pmp->pm_inusemap, M_MSDOSFSFAT);
798 free(pmp, M_MSDOSFSMNT);
799 mp->mnt_data = (qaddr_t)0;
800 mp->mnt_flag &= ~MNT_LOCAL;
805 msdosfs_root(mp, vpp)
809 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
814 printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
816 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
824 msdosfs_statfs(mp, sbp, p)
829 struct msdosfsmount *pmp;
831 pmp = VFSTOMSDOSFS(mp);
832 sbp->f_bsize = pmp->pm_bpcluster;
833 sbp->f_iosize = pmp->pm_bpcluster;
834 sbp->f_blocks = pmp->pm_maxcluster + 1;
835 sbp->f_bfree = pmp->pm_freeclustercount;
836 sbp->f_bavail = pmp->pm_freeclustercount;
837 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
838 sbp->f_ffree = 0; /* what to put in here? */
839 if (sbp != &mp->mnt_stat) {
840 sbp->f_type = mp->mnt_vfc->vfc_typenum;
841 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
842 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
844 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
849 msdosfs_sync(mp, waitfor, cred, p)
855 struct vnode *vp, *nvp;
857 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
858 int error, allerror = 0;
861 * If we ever switch to not updating all of the fats all the time,
862 * this would be the place to update them from the first one.
864 if (pmp->pm_fmod != 0) {
865 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
866 panic("msdosfs_sync: rofs mod");
868 /* update fats here */
872 * Write back each (modified) denode.
874 simple_lock(&mntvnode_slock);
876 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp != NULL; vp = nvp) {
878 * If the vnode that we are about to sync is no longer
879 * associated with this mount point, start over.
881 if (vp->v_mount != mp)
884 simple_lock(&vp->v_interlock);
885 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
887 if (vp->v_type == VNON ||
889 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
890 (TAILQ_EMPTY(&vp->v_dirtyblkhd) || waitfor == MNT_LAZY))) {
891 simple_unlock(&vp->v_interlock);
894 simple_unlock(&mntvnode_slock);
895 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
897 simple_lock(&mntvnode_slock);
902 error = VOP_FSYNC(vp, cred, waitfor, p);
905 VOP_UNLOCK(vp, 0, p);
907 simple_lock(&mntvnode_slock);
909 simple_unlock(&mntvnode_slock);
912 * Flush filesystem control info.
914 if (waitfor != MNT_LAZY) {
915 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY, p);
916 error = VOP_FSYNC(pmp->pm_devvp, cred, waitfor, p);
919 VOP_UNLOCK(pmp->pm_devvp, 0, p);
925 msdosfs_fhtovp(mp, fhp, vpp)
930 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
931 struct defid *defhp = (struct defid *) fhp;
935 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
945 msdosfs_checkexp(mp, nam, exflagsp, credanonp)
947 struct sockaddr *nam;
949 struct ucred **credanonp;
951 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
954 np = vfs_export_lookup(mp, &pmp->pm_export, nam);
957 *exflagsp = np->netc_exflags;
958 *credanonp = &np->netc_anon;
963 msdosfs_vptofh(vp, fhp)
971 defhp = (struct defid *)fhp;
972 defhp->defid_len = sizeof(struct defid);
973 defhp->defid_dirclust = dep->de_dirclust;
974 defhp->defid_dirofs = dep->de_diroffset;
975 /* defhp->defid_gen = dep->de_gen; */
979 static struct vfsops msdosfs_vfsops = {
996 VFS_SET(msdosfs_vfsops, msdos, 0);