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/fcntl.h>
56 #include <sys/iconv.h>
57 #include <sys/kernel.h>
59 #include <sys/malloc.h>
60 #include <sys/mount.h>
61 #include <sys/mutex.h>
62 #include <sys/namei.h>
66 #include <sys/vnode.h>
68 #include <geom/geom.h>
69 #include <geom/geom_vfs.h>
71 #include <fs/msdosfs/bootsect.h>
72 #include <fs/msdosfs/bpb.h>
73 #include <fs/msdosfs/direntry.h>
74 #include <fs/msdosfs/denode.h>
75 #include <fs/msdosfs/fat.h>
76 #include <fs/msdosfs/msdosfsmount.h>
78 static const char msdosfs_lock_msg[] = "fatlk";
80 /* Mount options that we support. */
81 static const char *msdosfs_opts[] = {
82 "async", "noatime", "noclusterr", "noclusterw",
83 "export", "force", "from", "sync",
84 "cs_dos", "cs_local", "cs_win", "dirmask",
85 "gid", "kiconv", "large", "longname",
86 "longnames", "mask", "shortname", "shortnames",
87 "uid", "win95", "nowin95",
93 * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
94 * garbage or a random value :-{
95 * If you want to use that broken-signatured media, define the
96 * following symbol even though PC/AT.
97 * (ex. mount PC-98 DOS formatted FD on PC/AT)
99 #define MSDOSFS_NOCHECKSIG
102 MALLOC_DEFINE(M_MSDOSFSMNT, "msdosfs_mount", "MSDOSFS mount structure");
103 static MALLOC_DEFINE(M_MSDOSFSFAT, "msdosfs_fat", "MSDOSFS file allocation table");
105 struct iconv_functions *msdosfs_iconv;
107 static int update_mp(struct mount *mp, struct thread *td);
108 static int mountmsdosfs(struct vnode *devvp, struct mount *mp);
109 static vfs_fhtovp_t msdosfs_fhtovp;
110 static vfs_mount_t msdosfs_mount;
111 static vfs_root_t msdosfs_root;
112 static vfs_statfs_t msdosfs_statfs;
113 static vfs_sync_t msdosfs_sync;
114 static vfs_unmount_t msdosfs_unmount;
116 /* Maximum length of a character set name (arbitrary). */
120 update_mp(struct mount *mp, struct thread *td)
122 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
123 void *dos, *win, *local;
126 if (!vfs_getopt(mp->mnt_optnew, "kiconv", NULL, NULL)) {
127 if (msdosfs_iconv != NULL) {
128 error = vfs_getopt(mp->mnt_optnew,
129 "cs_win", &win, NULL);
131 error = vfs_getopt(mp->mnt_optnew,
132 "cs_local", &local, NULL);
134 error = vfs_getopt(mp->mnt_optnew,
135 "cs_dos", &dos, NULL);
137 msdosfs_iconv->open(win, local, &pmp->pm_u2w);
138 msdosfs_iconv->open(local, win, &pmp->pm_w2u);
139 msdosfs_iconv->open(dos, local, &pmp->pm_u2d);
140 msdosfs_iconv->open(local, dos, &pmp->pm_d2u);
152 if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
154 if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
156 if (1 == vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v))
157 pmp->pm_mask = v & ALLPERMS;
158 if (1 == vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v))
159 pmp->pm_dirmask = v & ALLPERMS;
160 vfs_flagopt(mp->mnt_optnew, "shortname",
161 &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
162 vfs_flagopt(mp->mnt_optnew, "shortnames",
163 &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
164 vfs_flagopt(mp->mnt_optnew, "longname",
165 &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
166 vfs_flagopt(mp->mnt_optnew, "longnames",
167 &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
168 vfs_flagopt(mp->mnt_optnew, "kiconv",
169 &pmp->pm_flags, MSDOSFSMNT_KICONV);
171 if (vfs_getopt(mp->mnt_optnew, "nowin95", NULL, NULL) == 0)
172 pmp->pm_flags |= MSDOSFSMNT_NOWIN95;
174 pmp->pm_flags &= ~MSDOSFSMNT_NOWIN95;
176 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
177 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
178 else if (!(pmp->pm_flags &
179 (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) {
180 struct vnode *rootvp;
183 * Try to divine whether to support Win'95 long filenames
186 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
189 msdosfs_root(mp, LK_EXCLUSIVE, &rootvp)) != 0)
191 pmp->pm_flags |= findwin95(VTODE(rootvp)) ?
192 MSDOSFSMNT_LONGNAME : MSDOSFSMNT_SHORTNAME;
200 msdosfs_cmount(struct mntarg *ma, void *data, int flags)
202 struct msdosfs_args args;
203 struct export_args exp;
208 error = copyin(data, &args, sizeof args);
211 vfs_oexport_conv(&args.export, &exp);
213 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
214 ma = mount_arg(ma, "export", &exp, sizeof(exp));
215 ma = mount_argf(ma, "uid", "%d", args.uid);
216 ma = mount_argf(ma, "gid", "%d", args.gid);
217 ma = mount_argf(ma, "mask", "%d", args.mask);
218 ma = mount_argf(ma, "dirmask", "%d", args.dirmask);
220 ma = mount_argb(ma, args.flags & MSDOSFSMNT_SHORTNAME, "noshortname");
221 ma = mount_argb(ma, args.flags & MSDOSFSMNT_LONGNAME, "nolongname");
222 ma = mount_argb(ma, !(args.flags & MSDOSFSMNT_NOWIN95), "nowin95");
223 ma = mount_argb(ma, args.flags & MSDOSFSMNT_KICONV, "nokiconv");
225 ma = mount_argsu(ma, "cs_win", args.cs_win, MAXCSLEN);
226 ma = mount_argsu(ma, "cs_dos", args.cs_dos, MAXCSLEN);
227 ma = mount_argsu(ma, "cs_local", args.cs_local, MAXCSLEN);
229 error = kernel_mount(ma, flags);
235 * mp - path - addr in user space of mount point (ie /usr or whatever)
236 * data - addr in user space of mount params including the name of the block
237 * special file to treat as a filesystem.
240 msdosfs_mount(struct mount *mp)
242 struct vnode *devvp; /* vnode for blk device to mount */
244 /* msdosfs specific mount control block */
245 struct msdosfsmount *pmp = NULL;
246 struct nameidata ndp;
252 if (vfs_filteropt(mp->mnt_optnew, msdosfs_opts))
256 * If updating, check whether changing from read-only to
257 * read/write; if there is no device name, that's all we do.
259 if (mp->mnt_flag & MNT_UPDATE) {
260 pmp = VFSTOMSDOSFS(mp);
261 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) {
263 * Forbid export requests if filesystem has
264 * MSDOSFS_LARGEFS flag set.
266 if ((pmp->pm_flags & MSDOSFS_LARGEFS) != 0) {
268 "MSDOSFS_LARGEFS flag set, cannot export");
272 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) &&
273 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
274 error = VFS_SYNC(mp, MNT_WAIT);
278 if (mp->mnt_flag & MNT_FORCE)
280 error = vflush(mp, 0, flags, td);
285 * Now the volume is clean. Mark it so while the
286 * device is still rw.
288 error = markvoldirty(pmp, 0);
290 (void)markvoldirty(pmp, 1);
294 /* Downgrade the device from rw to ro. */
297 error = g_access(pmp->pm_cp, 0, -1, 0);
301 (void)markvoldirty(pmp, 1);
306 * Backing out after an error was painful in the
307 * above. Now we are committed to succeeding.
310 pmp->pm_flags |= MSDOSFSMNT_RONLY;
312 mp->mnt_flag |= MNT_RDONLY;
314 } else if ((pmp->pm_flags & MSDOSFSMNT_RONLY) &&
315 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
317 * If upgrade to read-write by non-root, then verify
318 * that user has necessary permissions on the device.
320 devvp = pmp->pm_devvp;
321 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
322 error = VOP_ACCESS(devvp, VREAD | VWRITE,
325 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
327 VOP_UNLOCK(devvp, 0);
330 VOP_UNLOCK(devvp, 0);
333 error = g_access(pmp->pm_cp, 0, 1, 0);
340 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
342 mp->mnt_flag &= ~MNT_RDONLY;
345 /* Now that the volume is modifiable, mark it dirty. */
346 error = markvoldirty(pmp, 1);
352 * Not an update, or updating the name: look up the name
353 * and verify that it refers to a sensible disk device.
355 if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL))
357 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td);
362 NDFREE(&ndp, NDF_ONLY_PNBUF);
364 if (!vn_isdisk(devvp, &error)) {
369 * If mount by non-root, then verify that user has necessary
370 * permissions on the device.
373 if ((mp->mnt_flag & MNT_RDONLY) == 0)
375 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
377 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
382 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
383 error = mountmsdosfs(devvp, mp);
384 #ifdef MSDOSFS_DEBUG /* only needed for the printf below */
385 pmp = VFSTOMSDOSFS(mp);
389 if (devvp != pmp->pm_devvp)
390 return (EINVAL); /* XXX needs translation */
397 error = update_mp(mp, td);
399 if ((mp->mnt_flag & MNT_UPDATE) == 0)
400 msdosfs_unmount(mp, MNT_FORCE);
404 vfs_mountedfrom(mp, from);
406 printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
412 mountmsdosfs(struct vnode *devvp, struct mount *mp)
414 struct msdosfsmount *pmp;
417 union bootsector *bsp;
418 struct byte_bpb33 *b33;
419 struct byte_bpb50 *b50;
420 struct byte_bpb710 *b710;
421 u_int8_t SecPerClust;
424 struct g_consumer *cp;
427 bp = NULL; /* This and pmp both used in error_exit. */
429 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
435 error = g_vfs_open(devvp, &cp, "msdosfs", ronly ? 0 : 1);
438 VOP_UNLOCK(devvp, 0);
442 bo = &devvp->v_bufobj;
445 * Read the boot sector of the filesystem, and then check the
446 * boot signature. If not a dos boot sector then error out.
448 * NOTE: 8192 is a magic size that works for ffs.
450 error = bread(devvp, 0, 8192, NOCRED, &bp);
453 bp->b_flags |= B_AGE;
454 bsp = (union bootsector *)bp->b_data;
455 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
456 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
457 b710 = (struct byte_bpb710 *)bsp->bs710.bsBPB;
459 #ifndef MSDOSFS_NOCHECKSIG
460 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
461 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
467 pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO);
472 lockinit(&pmp->pm_fatlock, 0, msdosfs_lock_msg, 0, 0);
475 * Initialize ownerships and permissions, since nothing else will
476 * initialize them iff we are mounting root.
478 pmp->pm_uid = UID_ROOT;
479 pmp->pm_gid = GID_WHEEL;
480 pmp->pm_mask = pmp->pm_dirmask = S_IXUSR | S_IXGRP | S_IXOTH |
481 S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR;
484 * Experimental support for large MS-DOS filesystems.
485 * WARNING: This uses at least 32 bytes of kernel memory (which is not
486 * reclaimed until the FS is unmounted) for each file on disk to map
487 * between the 32-bit inode numbers used by VFS and the 64-bit
488 * pseudo-inode numbers used internally by msdosfs. This is only
489 * safe to use in certain controlled situations (e.g. read-only FS
490 * with less than 1 million files).
491 * Since the mappings do not persist across unmounts (or reboots), these
492 * filesystems are not suitable for exporting through NFS, or any other
493 * application that requires fixed inode numbers.
495 vfs_flagopt(mp->mnt_optnew, "large", &pmp->pm_flags, MSDOSFS_LARGEFS);
498 * Compute several useful quantities from the bpb in the
499 * bootsector. Copy in the dos 5 variant of the bpb then fix up
500 * the fields that are different between dos 5 and dos 3.3.
502 SecPerClust = b50->bpbSecPerClust;
503 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
504 if (pmp->pm_BytesPerSec < DEV_BSIZE) {
508 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
509 pmp->pm_FATs = b50->bpbFATs;
510 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
511 pmp->pm_Sectors = getushort(b50->bpbSectors);
512 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
513 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
514 pmp->pm_Heads = getushort(b50->bpbHeads);
515 pmp->pm_Media = b50->bpbMedia;
517 /* calculate the ratio of sector size to DEV_BSIZE */
518 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
521 * We don't check pm_Heads nor pm_SecPerTrack, because
522 * these may not be set for EFI file systems. We don't
523 * use these anyway, so we're unaffected if they are
526 if (!pmp->pm_BytesPerSec || !SecPerClust) {
531 if (pmp->pm_Sectors == 0) {
532 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
533 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
535 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
536 pmp->pm_HugeSectors = pmp->pm_Sectors;
538 if (!(pmp->pm_flags & MSDOSFS_LARGEFS)) {
539 if (pmp->pm_HugeSectors > 0xffffffff /
540 (pmp->pm_BytesPerSec / sizeof(struct direntry)) + 1) {
542 * We cannot deal currently with this size of disk
543 * due to fileid limitations (see msdosfs_getattr and
548 "Disk too big, try '-o large' mount option");
553 if (pmp->pm_RootDirEnts == 0) {
556 || getushort(b710->bpbFSVers)) {
559 printf("mountmsdosfs(): bad FAT32 filesystem\n");
563 pmp->pm_fatmask = FAT32_MASK;
566 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
567 if (getushort(b710->bpbExtFlags) & FATMIRROR)
568 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
570 pmp->pm_flags |= MSDOSFS_FATMIRROR;
572 pmp->pm_flags |= MSDOSFS_FATMIRROR;
575 * Check a few values (could do some more):
576 * - logical sector size: power of 2, >= block size
577 * - sectors per cluster: power of 2, >= 1
578 * - number of sectors: >= 1, <= size of partition
579 * - number of FAT sectors: >= 1
581 if ( (SecPerClust == 0)
582 || (SecPerClust & (SecPerClust - 1))
583 || (pmp->pm_BytesPerSec < DEV_BSIZE)
584 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
585 || (pmp->pm_HugeSectors == 0)
586 || (pmp->pm_FATsecs == 0)
587 || (SecPerClust * pmp->pm_BlkPerSec > MAXBSIZE / DEV_BSIZE)
593 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
594 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
595 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
596 SecPerClust *= pmp->pm_BlkPerSec;
598 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
601 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
602 pmp->pm_firstcluster = pmp->pm_fatblk
603 + (pmp->pm_FATs * pmp->pm_FATsecs);
604 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
606 pmp->pm_rootdirblk = pmp->pm_fatblk +
607 (pmp->pm_FATs * pmp->pm_FATsecs);
608 pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)
610 / DEV_BSIZE; /* in blocks */
611 pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
614 pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
616 pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */
618 if (pmp->pm_fatmask == 0) {
619 if (pmp->pm_maxcluster
620 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
622 * This will usually be a floppy disk. This size makes
623 * sure that one fat entry will not be split across
626 pmp->pm_fatmask = FAT12_MASK;
630 pmp->pm_fatmask = FAT16_MASK;
636 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
637 if (pmp->pm_maxcluster >= clusters) {
639 printf("Warning: number of clusters (%ld) exceeds FAT "
640 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
642 pmp->pm_maxcluster = clusters - 1;
646 pmp->pm_fatblocksize = 3 * 512;
648 pmp->pm_fatblocksize = PAGE_SIZE;
649 pmp->pm_fatblocksize = roundup(pmp->pm_fatblocksize,
650 pmp->pm_BytesPerSec);
651 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
652 pmp->pm_bnshift = ffs(DEV_BSIZE) - 1;
655 * Compute mask and shift value for isolating cluster relative byte
656 * offsets and cluster numbers from a file offset.
658 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
659 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
660 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
663 * Check for valid cluster size
664 * must be a power of 2
666 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
672 * Release the bootsector buffer.
678 * Check the fsinfo sector if we have one. Silently fix up our
679 * in-core copy of fp->fsinxtfree if it is unknown (0xffffffff)
680 * or too large. Ignore fp->fsinfree for now, since we need to
681 * read the entire FAT anyway to fill the inuse map.
683 if (pmp->pm_fsinfo) {
686 if ((error = bread(devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
689 fp = (struct fsinfo *)bp->b_data;
690 if (!bcmp(fp->fsisig1, "RRaA", 4)
691 && !bcmp(fp->fsisig2, "rrAa", 4)
692 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)) {
693 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
694 if (pmp->pm_nxtfree > pmp->pm_maxcluster)
695 pmp->pm_nxtfree = CLUST_FIRST;
703 * Finish initializing pmp->pm_nxtfree (just in case the first few
704 * sectors aren't properly reserved in the FAT). This completes
705 * the fixup for fp->fsinxtfree, and fixes up the zero-initialized
706 * value if there is no fsinfo. We will use pmp->pm_nxtfree
707 * internally even if there is no fsinfo.
709 if (pmp->pm_nxtfree < CLUST_FIRST)
710 pmp->pm_nxtfree = CLUST_FIRST;
713 * Allocate memory for the bitmap of allocated clusters, and then
716 pmp->pm_inusemap = malloc(howmany(pmp->pm_maxcluster + 1, N_INUSEBITS)
717 * sizeof(*pmp->pm_inusemap),
718 M_MSDOSFSFAT, M_WAITOK);
721 * fillinusemap() needs pm_devvp.
723 pmp->pm_devvp = devvp;
727 * Have the inuse map filled in.
729 MSDOSFS_LOCK_MP(pmp);
730 error = fillinusemap(pmp);
731 MSDOSFS_UNLOCK_MP(pmp);
736 * If they want fat updates to be synchronous then let them suffer
737 * the performance degradation in exchange for the on disk copy of
738 * the fat being correct just about all the time. I suppose this
739 * would be a good thing to turn on if the kernel is still flakey.
741 if (mp->mnt_flag & MNT_SYNCHRONOUS)
742 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
748 pmp->pm_flags |= MSDOSFSMNT_RONLY;
750 if ((error = markvoldirty(pmp, 1)) != 0) {
751 (void)markvoldirty(pmp, 0);
757 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
758 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
760 mp->mnt_flag |= MNT_LOCAL;
761 mp->mnt_kern_flag |= MNTK_MPSAFE;
764 if (pmp->pm_flags & MSDOSFS_LARGEFS)
765 msdosfs_fileno_init(mp);
780 lockdestroy(&pmp->pm_fatlock);
781 if (pmp->pm_inusemap)
782 free(pmp->pm_inusemap, M_MSDOSFSFAT);
783 free(pmp, M_MSDOSFSMNT);
791 * Unmount the filesystem described by mp.
794 msdosfs_unmount(struct mount *mp, int mntflags)
796 struct msdosfsmount *pmp;
800 if (mntflags & MNT_FORCE)
802 error = vflush(mp, 0, flags, curthread);
803 if (error && error != ENXIO)
805 pmp = VFSTOMSDOSFS(mp);
806 if ((pmp->pm_flags & MSDOSFSMNT_RONLY) == 0) {
807 error = markvoldirty(pmp, 0);
808 if (error && error != ENXIO) {
809 (void)markvoldirty(pmp, 1);
813 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
815 msdosfs_iconv->close(pmp->pm_w2u);
817 msdosfs_iconv->close(pmp->pm_u2w);
819 msdosfs_iconv->close(pmp->pm_d2u);
821 msdosfs_iconv->close(pmp->pm_u2d);
826 struct vnode *vp = pmp->pm_devvp;
833 "msdosfs_umount(): just before calling VOP_CLOSE()\n");
834 printf("freef %p, freeb %p, mount %p\n",
835 TAILQ_NEXT(vp, v_freelist), vp->v_freelist.tqe_prev,
837 printf("cleanblkhd %p, dirtyblkhd %p, numoutput %ld, type %d\n",
838 TAILQ_FIRST(&vp->v_bufobj.bo_clean.bv_hd),
839 TAILQ_FIRST(&vp->v_bufobj.bo_dirty.bv_hd),
840 vp->v_bufobj.bo_numoutput, vp->v_type);
847 g_vfs_close(pmp->pm_cp);
850 vrele(pmp->pm_devvp);
851 dev_rel(pmp->pm_dev);
852 free(pmp->pm_inusemap, M_MSDOSFSFAT);
853 if (pmp->pm_flags & MSDOSFS_LARGEFS)
854 msdosfs_fileno_free(mp);
855 lockdestroy(&pmp->pm_fatlock);
856 free(pmp, M_MSDOSFSMNT);
859 mp->mnt_flag &= ~MNT_LOCAL;
865 msdosfs_root(struct mount *mp, int flags, struct vnode **vpp)
867 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
872 printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
874 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep);
882 msdosfs_statfs(struct mount *mp, struct statfs *sbp)
884 struct msdosfsmount *pmp;
886 pmp = VFSTOMSDOSFS(mp);
887 sbp->f_bsize = pmp->pm_bpcluster;
888 sbp->f_iosize = pmp->pm_bpcluster;
889 sbp->f_blocks = pmp->pm_maxcluster + 1;
890 sbp->f_bfree = pmp->pm_freeclustercount;
891 sbp->f_bavail = pmp->pm_freeclustercount;
892 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
893 sbp->f_ffree = 0; /* what to put in here? */
898 msdosfs_sync(struct mount *mp, int waitfor)
900 struct vnode *vp, *nvp;
903 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
904 int error, allerror = 0;
909 * If we ever switch to not updating all of the fats all the time,
910 * this would be the place to update them from the first one.
912 if (pmp->pm_fmod != 0) {
913 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
914 panic("msdosfs_sync: rofs mod");
916 /* update fats here */
920 * Write back each (modified) denode.
924 MNT_VNODE_FOREACH(vp, mp, nvp) {
926 if (vp->v_type == VNON || (vp->v_iflag & VI_DOOMED)) {
933 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
934 (vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
935 waitfor == MNT_LAZY)) {
940 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, td);
947 error = VOP_FSYNC(vp, waitfor, td);
957 * Flush filesystem control info.
959 if (waitfor != MNT_LAZY) {
960 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
961 error = VOP_FSYNC(pmp->pm_devvp, waitfor, td);
964 VOP_UNLOCK(pmp->pm_devvp, 0);
970 msdosfs_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
972 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
973 struct defid *defhp = (struct defid *) fhp;
977 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep);
983 vnode_create_vobject(*vpp, dep->de_FileSize, curthread);
987 static struct vfsops msdosfs_vfsops = {
988 .vfs_fhtovp = msdosfs_fhtovp,
989 .vfs_mount = msdosfs_mount,
990 .vfs_cmount = msdosfs_cmount,
991 .vfs_root = msdosfs_root,
992 .vfs_statfs = msdosfs_statfs,
993 .vfs_sync = msdosfs_sync,
994 .vfs_unmount = msdosfs_unmount,
997 VFS_SET(msdosfs_vfsops, msdosfs, 0);
998 MODULE_VERSION(msdosfs, 1);