2 /* $NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $ */
5 * SPDX-License-Identifier: BSD-4-Clause
7 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
8 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
10 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by TooLs GmbH.
23 * 4. The name of TooLs GmbH may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
32 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
33 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
34 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
35 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 * Written by Paul Popelka (paulp@uts.amdahl.com)
40 * You can do anything you want with this software, just don't say you wrote
41 * it, and don't remove this notice.
43 * This software is provided "as is".
45 * The author supplies this software to be publicly redistributed on the
46 * understanding that the author is not responsible for the correct
47 * functioning of this software in any circumstances and is not liable for
48 * any damages caused by this software.
53 #include <sys/param.h>
54 #include <sys/systm.h>
57 #include <sys/fcntl.h>
58 #include <sys/iconv.h>
59 #include <sys/kernel.h>
61 #include <sys/malloc.h>
62 #include <sys/mount.h>
63 #include <sys/mutex.h>
64 #include <sys/namei.h>
68 #include <sys/vnode.h>
70 #include <geom/geom.h>
71 #include <geom/geom_vfs.h>
73 #include <fs/msdosfs/bootsect.h>
74 #include <fs/msdosfs/bpb.h>
75 #include <fs/msdosfs/direntry.h>
76 #include <fs/msdosfs/denode.h>
77 #include <fs/msdosfs/fat.h>
78 #include <fs/msdosfs/msdosfsmount.h>
81 #include <sys/rwlock.h>
84 static const char msdosfs_lock_msg[] = "fatlk";
86 /* Mount options that we support. */
87 static const char *msdosfs_opts[] = {
88 "async", "noatime", "noclusterr", "noclusterw",
89 "export", "force", "from", "sync",
90 "cs_dos", "cs_local", "cs_win", "dirmask",
91 "gid", "kiconv", "longname",
92 "longnames", "mask", "shortname", "shortnames",
93 "uid", "win95", "nowin95",
99 * XXX - The boot signature formatted by NEC PC-98 DOS looks like a
100 * garbage or a random value :-{
101 * If you want to use that broken-signatured media, define the
102 * following symbol even though PC/AT.
103 * (ex. mount PC-98 DOS formatted FD on PC/AT)
105 #define MSDOSFS_NOCHECKSIG
108 MALLOC_DEFINE(M_MSDOSFSMNT, "msdosfs_mount", "MSDOSFS mount structure");
109 static MALLOC_DEFINE(M_MSDOSFSFAT, "msdosfs_fat", "MSDOSFS file allocation table");
111 struct iconv_functions *msdosfs_iconv;
113 static int update_mp(struct mount *mp, struct thread *td);
114 static int mountmsdosfs(struct vnode *devvp, struct mount *mp);
115 static vfs_fhtovp_t msdosfs_fhtovp;
116 static vfs_mount_t msdosfs_mount;
117 static vfs_root_t msdosfs_root;
118 static vfs_statfs_t msdosfs_statfs;
119 static vfs_sync_t msdosfs_sync;
120 static vfs_unmount_t msdosfs_unmount;
122 /* Maximum length of a character set name (arbitrary). */
126 update_mp(struct mount *mp, struct thread *td)
128 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
129 void *dos, *win, *local;
132 if (!vfs_getopt(mp->mnt_optnew, "kiconv", NULL, NULL)) {
133 if (msdosfs_iconv != NULL) {
134 error = vfs_getopt(mp->mnt_optnew,
135 "cs_win", &win, NULL);
137 error = vfs_getopt(mp->mnt_optnew,
138 "cs_local", &local, NULL);
140 error = vfs_getopt(mp->mnt_optnew,
141 "cs_dos", &dos, NULL);
143 msdosfs_iconv->open(win, local, &pmp->pm_u2w);
144 msdosfs_iconv->open(local, win, &pmp->pm_w2u);
145 msdosfs_iconv->open(dos, local, &pmp->pm_u2d);
146 msdosfs_iconv->open(local, dos, &pmp->pm_d2u);
158 if (vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v) == 1)
160 if (vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v) == 1)
162 if (vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v) == 1)
163 pmp->pm_mask = v & ALLPERMS;
164 if (vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v) == 1)
165 pmp->pm_dirmask = v & ALLPERMS;
166 vfs_flagopt(mp->mnt_optnew, "shortname",
167 &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
168 vfs_flagopt(mp->mnt_optnew, "shortnames",
169 &pmp->pm_flags, MSDOSFSMNT_SHORTNAME);
170 vfs_flagopt(mp->mnt_optnew, "longname",
171 &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
172 vfs_flagopt(mp->mnt_optnew, "longnames",
173 &pmp->pm_flags, MSDOSFSMNT_LONGNAME);
174 vfs_flagopt(mp->mnt_optnew, "kiconv",
175 &pmp->pm_flags, MSDOSFSMNT_KICONV);
177 if (vfs_getopt(mp->mnt_optnew, "nowin95", NULL, NULL) == 0)
178 pmp->pm_flags |= MSDOSFSMNT_NOWIN95;
180 pmp->pm_flags &= ~MSDOSFSMNT_NOWIN95;
182 if (pmp->pm_flags & MSDOSFSMNT_NOWIN95)
183 pmp->pm_flags |= MSDOSFSMNT_SHORTNAME;
185 pmp->pm_flags |= MSDOSFSMNT_LONGNAME;
190 msdosfs_cmount(struct mntarg *ma, void *data, uint64_t flags)
192 struct msdosfs_args args;
197 error = copyin(data, &args, sizeof args);
201 ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
202 ma = mount_arg(ma, "export", &args.export, sizeof(args.export));
203 ma = mount_argf(ma, "uid", "%d", args.uid);
204 ma = mount_argf(ma, "gid", "%d", args.gid);
205 ma = mount_argf(ma, "mask", "%d", args.mask);
206 ma = mount_argf(ma, "dirmask", "%d", args.dirmask);
208 ma = mount_argb(ma, args.flags & MSDOSFSMNT_SHORTNAME, "noshortname");
209 ma = mount_argb(ma, args.flags & MSDOSFSMNT_LONGNAME, "nolongname");
210 ma = mount_argb(ma, !(args.flags & MSDOSFSMNT_NOWIN95), "nowin95");
211 ma = mount_argb(ma, args.flags & MSDOSFSMNT_KICONV, "nokiconv");
213 ma = mount_argsu(ma, "cs_win", args.cs_win, MAXCSLEN);
214 ma = mount_argsu(ma, "cs_dos", args.cs_dos, MAXCSLEN);
215 ma = mount_argsu(ma, "cs_local", args.cs_local, MAXCSLEN);
217 error = kernel_mount(ma, flags);
223 * mp - path - addr in user space of mount point (ie /usr or whatever)
224 * data - addr in user space of mount params including the name of the block
225 * special file to treat as a filesystem.
228 msdosfs_mount(struct mount *mp)
230 struct vnode *devvp; /* vnode for blk device to mount */
232 /* msdosfs specific mount control block */
233 struct msdosfsmount *pmp = NULL;
234 struct nameidata ndp;
240 if (vfs_filteropt(mp->mnt_optnew, msdosfs_opts))
244 * If updating, check whether changing from read-only to
245 * read/write; if there is no device name, that's all we do.
247 if (mp->mnt_flag & MNT_UPDATE) {
248 pmp = VFSTOMSDOSFS(mp);
249 if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) &&
250 vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
251 if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
253 error = vfs_write_suspend_umnt(mp);
258 if (mp->mnt_flag & MNT_FORCE)
260 error = vflush(mp, 0, flags, td);
262 vfs_write_resume(mp, 0);
267 * Now the volume is clean. Mark it so while the
268 * device is still rw.
270 error = markvoldirty(pmp, 0);
272 vfs_write_resume(mp, 0);
273 (void)markvoldirty(pmp, 1);
277 /* Downgrade the device from rw to ro. */
279 error = g_access(pmp->pm_cp, 0, -1, 0);
282 vfs_write_resume(mp, 0);
283 (void)markvoldirty(pmp, 1);
288 * Backing out after an error was painful in the
289 * above. Now we are committed to succeeding.
292 pmp->pm_flags |= MSDOSFSMNT_RONLY;
294 mp->mnt_flag |= MNT_RDONLY;
296 vfs_write_resume(mp, 0);
297 } else if ((pmp->pm_flags & MSDOSFSMNT_RONLY) &&
298 !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
300 * If upgrade to read-write by non-root, then verify
301 * that user has necessary permissions on the device.
303 devvp = pmp->pm_devvp;
304 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
305 error = VOP_ACCESS(devvp, VREAD | VWRITE,
308 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
315 error = g_access(pmp->pm_cp, 0, 1, 0);
320 /* Now that the volume is modifiable, mark it dirty. */
321 error = markvoldirty_upgrade(pmp, true, true);
324 * If dirtying the superblock failed, drop GEOM
325 * 'w' refs (we're still RO).
328 (void)g_access(pmp->pm_cp, 0, -1, 0);
335 pmp->pm_flags &= ~MSDOSFSMNT_RONLY;
337 mp->mnt_flag &= ~MNT_RDONLY;
342 * Not an update, or updating the name: look up the name
343 * and verify that it refers to a sensible disk device.
345 if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL))
347 NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td);
352 NDFREE(&ndp, NDF_ONLY_PNBUF);
354 if (!vn_isdisk_error(devvp, &error)) {
359 * If mount by non-root, then verify that user has necessary
360 * permissions on the device.
363 if ((mp->mnt_flag & MNT_RDONLY) == 0)
365 error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
367 error = priv_check(td, PRIV_VFS_MOUNT_PERM);
372 if ((mp->mnt_flag & MNT_UPDATE) == 0) {
373 error = mountmsdosfs(devvp, mp);
374 #ifdef MSDOSFS_DEBUG /* only needed for the printf below */
375 pmp = VFSTOMSDOSFS(mp);
379 if (devvp != pmp->pm_devvp)
380 return (EINVAL); /* XXX needs translation */
387 error = update_mp(mp, td);
389 if ((mp->mnt_flag & MNT_UPDATE) == 0)
390 msdosfs_unmount(mp, MNT_FORCE);
394 vfs_mountedfrom(mp, from);
396 printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
402 mountmsdosfs(struct vnode *devvp, struct mount *mp)
404 struct msdosfsmount *pmp;
407 union bootsector *bsp;
408 struct byte_bpb33 *b33;
409 struct byte_bpb50 *b50;
410 struct byte_bpb710 *b710;
414 struct g_consumer *cp;
417 bp = NULL; /* This and pmp both used in error_exit. */
419 ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
422 if (atomic_cmpset_acq_ptr((uintptr_t *)&dev->si_mountpt, 0,
423 (uintptr_t)mp) == 0) {
428 error = g_vfs_open(devvp, &cp, "msdosfs", ronly ? 0 : 1);
431 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
436 bo = &devvp->v_bufobj;
438 if (dev->si_iosize_max != 0)
439 mp->mnt_iosize_max = dev->si_iosize_max;
440 if (mp->mnt_iosize_max > maxphys)
441 mp->mnt_iosize_max = maxphys;
444 * Read the boot sector of the filesystem, and then check the
445 * boot signature. If not a dos boot sector then error out.
447 * NOTE: 8192 is a magic size that works for ffs.
449 error = bread(devvp, 0, 8192, NOCRED, &bp);
452 bp->b_flags |= B_AGE;
453 bsp = (union bootsector *)bp->b_data;
454 b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB;
455 b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB;
456 b710 = (struct byte_bpb710 *)bsp->bs710.bsBPB;
458 #ifndef MSDOSFS_NOCHECKSIG
459 if (bsp->bs50.bsBootSectSig0 != BOOTSIG0
460 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) {
466 pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO);
471 lockinit(&pmp->pm_fatlock, 0, msdosfs_lock_msg, 0, 0);
472 lockinit(&pmp->pm_checkpath_lock, 0, "msdoscp", 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 * Compute several useful quantities from the bpb in the
485 * bootsector. Copy in the dos 5 variant of the bpb then fix up
486 * the fields that are different between dos 5 and dos 3.3.
488 SecPerClust = b50->bpbSecPerClust;
489 pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
490 if (pmp->pm_BytesPerSec < DEV_BSIZE) {
494 pmp->pm_ResSectors = getushort(b50->bpbResSectors);
495 pmp->pm_FATs = b50->bpbFATs;
496 pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
497 pmp->pm_Sectors = getushort(b50->bpbSectors);
498 pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
499 pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
500 pmp->pm_Heads = getushort(b50->bpbHeads);
501 pmp->pm_Media = b50->bpbMedia;
503 /* calculate the ratio of sector size to DEV_BSIZE */
504 pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE;
507 * We don't check pm_Heads nor pm_SecPerTrack, because
508 * these may not be set for EFI file systems. We don't
509 * use these anyway, so we're unaffected if they are
512 if (!pmp->pm_BytesPerSec || !SecPerClust) {
517 if (pmp->pm_Sectors == 0) {
518 pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
519 pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
521 pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
522 pmp->pm_HugeSectors = pmp->pm_Sectors;
525 if (pmp->pm_RootDirEnts == 0) {
527 || getushort(b710->bpbFSVers)) {
530 printf("mountmsdosfs(): bad FAT32 filesystem\n");
534 pmp->pm_fatmask = FAT32_MASK;
537 pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs);
538 if (getushort(b710->bpbExtFlags) & FATMIRROR)
539 pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM;
541 pmp->pm_flags |= MSDOSFS_FATMIRROR;
543 pmp->pm_flags |= MSDOSFS_FATMIRROR;
546 * Check a few values (could do some more):
547 * - logical sector size: power of 2, >= block size
548 * - sectors per cluster: power of 2, >= 1
549 * - number of sectors: >= 1, <= size of partition
550 * - number of FAT sectors: >= 1
552 if ( (SecPerClust == 0)
553 || (SecPerClust & (SecPerClust - 1))
554 || (pmp->pm_BytesPerSec < DEV_BSIZE)
555 || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1))
556 || (pmp->pm_HugeSectors == 0)
557 || (pmp->pm_FATsecs == 0)
558 || (SecPerClust * pmp->pm_BlkPerSec > MAXBSIZE / DEV_BSIZE)
564 pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
565 pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */
566 pmp->pm_FATsecs *= pmp->pm_BlkPerSec;
567 SecPerClust *= pmp->pm_BlkPerSec;
569 pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec;
572 pmp->pm_rootdirblk = getulong(b710->bpbRootClust);
573 pmp->pm_firstcluster = pmp->pm_fatblk
574 + (pmp->pm_FATs * pmp->pm_FATsecs);
575 pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec;
577 pmp->pm_rootdirblk = pmp->pm_fatblk +
578 (pmp->pm_FATs * pmp->pm_FATsecs);
579 pmp->pm_rootdirsize = howmany(pmp->pm_RootDirEnts *
580 sizeof(struct direntry), 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? */
588 if (pmp->pm_fatmask == 0) {
589 if (pmp->pm_maxcluster
590 <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
592 * This will usually be a floppy disk. This size makes
593 * sure that one FAT entry will not be split across
596 pmp->pm_fatmask = FAT12_MASK;
600 pmp->pm_fatmask = FAT16_MASK;
606 clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv;
607 if (pmp->pm_maxcluster >= clusters) {
609 printf("Warning: number of clusters (%ld) exceeds FAT "
610 "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters);
612 pmp->pm_maxcluster = clusters - 1;
616 pmp->pm_fatblocksize = 3 * 512;
618 pmp->pm_fatblocksize = PAGE_SIZE;
619 pmp->pm_fatblocksize = roundup(pmp->pm_fatblocksize,
620 pmp->pm_BytesPerSec);
621 pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE;
622 pmp->pm_bnshift = ffs(DEV_BSIZE) - 1;
625 * Compute mask and shift value for isolating cluster relative byte
626 * offsets and cluster numbers from a file offset.
628 pmp->pm_bpcluster = SecPerClust * DEV_BSIZE;
629 pmp->pm_crbomask = pmp->pm_bpcluster - 1;
630 pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1;
633 * Check for valid cluster size
634 * must be a power of 2
636 if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) {
642 * Release the bootsector buffer.
648 * Check the fsinfo sector if we have one. Silently fix up our
649 * in-core copy of fp->fsinxtfree if it is unknown (0xffffffff)
650 * or too large. Ignore fp->fsinfree for now, since we need to
651 * read the entire FAT anyway to fill the inuse map.
653 if (pmp->pm_fsinfo) {
656 if ((error = bread(devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
659 fp = (struct fsinfo *)bp->b_data;
660 if (!bcmp(fp->fsisig1, "RRaA", 4)
661 && !bcmp(fp->fsisig2, "rrAa", 4)
662 && !bcmp(fp->fsisig3, "\0\0\125\252", 4)) {
663 pmp->pm_nxtfree = getulong(fp->fsinxtfree);
664 if (pmp->pm_nxtfree > pmp->pm_maxcluster)
665 pmp->pm_nxtfree = CLUST_FIRST;
673 * Finish initializing pmp->pm_nxtfree (just in case the first few
674 * sectors aren't properly reserved in the FAT). This completes
675 * the fixup for fp->fsinxtfree, and fixes up the zero-initialized
676 * value if there is no fsinfo. We will use pmp->pm_nxtfree
677 * internally even if there is no fsinfo.
679 if (pmp->pm_nxtfree < CLUST_FIRST)
680 pmp->pm_nxtfree = CLUST_FIRST;
683 * Allocate memory for the bitmap of allocated clusters, and then
686 pmp->pm_inusemap = malloc(howmany(pmp->pm_maxcluster + 1, N_INUSEBITS)
687 * sizeof(*pmp->pm_inusemap),
688 M_MSDOSFSFAT, M_WAITOK);
691 * fillinusemap() needs pm_devvp.
693 pmp->pm_devvp = devvp;
697 * Have the inuse map filled in.
699 MSDOSFS_LOCK_MP(pmp);
700 error = fillinusemap(pmp);
701 MSDOSFS_UNLOCK_MP(pmp);
706 * If they want FAT updates to be synchronous then let them suffer
707 * the performance degradation in exchange for the on disk copy of
708 * the FAT being correct just about all the time. I suppose this
709 * would be a good thing to turn on if the kernel is still flakey.
711 if (mp->mnt_flag & MNT_SYNCHRONOUS)
712 pmp->pm_flags |= MSDOSFSMNT_WAITONFAT;
718 pmp->pm_flags |= MSDOSFSMNT_RONLY;
720 if ((error = markvoldirty(pmp, 1)) != 0)
725 mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
726 mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
728 mp->mnt_flag |= MNT_LOCAL;
729 mp->mnt_kern_flag |= MNTK_USES_BCACHE | MNTK_NO_IOPF;
743 lockdestroy(&pmp->pm_fatlock);
744 lockdestroy(&pmp->pm_checkpath_lock);
745 free(pmp->pm_inusemap, M_MSDOSFSFAT);
746 free(pmp, M_MSDOSFSMNT);
749 atomic_store_rel_ptr((uintptr_t *)&dev->si_mountpt, 0);
755 * Unmount the filesystem described by mp.
758 msdosfs_unmount(struct mount *mp, int mntflags)
760 struct msdosfsmount *pmp;
765 pmp = VFSTOMSDOSFS(mp);
766 susp = (pmp->pm_flags & MSDOSFSMNT_RONLY) == 0;
769 error = vfs_write_suspend_umnt(mp);
774 if ((mntflags & MNT_FORCE) != 0)
776 error = vflush(mp, 0, flags, curthread);
777 if (error != 0 && error != ENXIO) {
779 vfs_write_resume(mp, VR_START_WRITE);
783 error = markvoldirty(pmp, 0);
784 if (error != 0 && error != ENXIO) {
786 vfs_write_resume(mp, VR_START_WRITE);
787 (void)markvoldirty(pmp, 1);
791 if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
793 msdosfs_iconv->close(pmp->pm_w2u);
795 msdosfs_iconv->close(pmp->pm_u2w);
797 msdosfs_iconv->close(pmp->pm_d2u);
799 msdosfs_iconv->close(pmp->pm_u2d);
804 struct vnode *vp = pmp->pm_devvp;
811 "msdosfs_umount(): just before calling VOP_CLOSE()\n");
812 printf("freef %p, freeb %p, mount %p\n",
813 TAILQ_NEXT(vp, v_vnodelist), vp->v_vnodelist.tqe_prev,
815 printf("cleanblkhd %p, dirtyblkhd %p, numoutput %d, type %d\n",
816 TAILQ_FIRST(&vp->v_bufobj.bo_clean.bv_hd),
817 TAILQ_FIRST(&vp->v_bufobj.bo_dirty.bv_hd),
818 vp->v_bufobj.bo_numoutput, vp->v_type);
824 vfs_write_resume(mp, VR_START_WRITE);
827 g_vfs_close(pmp->pm_cp);
829 atomic_store_rel_ptr((uintptr_t *)&pmp->pm_dev->si_mountpt, 0);
830 vrele(pmp->pm_devvp);
831 dev_rel(pmp->pm_dev);
832 free(pmp->pm_inusemap, M_MSDOSFSFAT);
833 lockdestroy(&pmp->pm_fatlock);
834 lockdestroy(&pmp->pm_checkpath_lock);
835 free(pmp, M_MSDOSFSMNT);
838 mp->mnt_flag &= ~MNT_LOCAL;
844 msdosfs_root(struct mount *mp, int flags, struct vnode **vpp)
846 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
851 printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp);
853 error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, LK_EXCLUSIVE, &ndep);
861 msdosfs_statfs(struct mount *mp, struct statfs *sbp)
863 struct msdosfsmount *pmp;
865 pmp = VFSTOMSDOSFS(mp);
866 sbp->f_bsize = pmp->pm_bpcluster;
867 sbp->f_iosize = pmp->pm_bpcluster;
868 sbp->f_blocks = pmp->pm_maxcluster + 1;
869 sbp->f_bfree = pmp->pm_freeclustercount;
870 sbp->f_bavail = pmp->pm_freeclustercount;
871 sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
872 sbp->f_ffree = 0; /* what to put in here? */
877 * If we have an FSInfo block, update it.
880 msdosfs_fsiflush(struct msdosfsmount *pmp, int waitfor)
886 MSDOSFS_LOCK_MP(pmp);
887 if (pmp->pm_fsinfo == 0 || (pmp->pm_flags & MSDOSFS_FSIMOD) == 0) {
891 error = bread(pmp->pm_devvp, pmp->pm_fsinfo, pmp->pm_BytesPerSec,
896 fp = (struct fsinfo *)bp->b_data;
897 putulong(fp->fsinfree, pmp->pm_freeclustercount);
898 putulong(fp->fsinxtfree, pmp->pm_nxtfree);
899 pmp->pm_flags &= ~MSDOSFS_FSIMOD;
900 if (waitfor == MNT_WAIT)
905 MSDOSFS_UNLOCK_MP(pmp);
910 msdosfs_sync(struct mount *mp, int waitfor)
912 struct vnode *vp, *nvp;
915 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
916 int error, allerror = 0;
921 * If we ever switch to not updating all of the FATs all the time,
922 * this would be the place to update them from the first one.
924 if (pmp->pm_fmod != 0) {
925 if (pmp->pm_flags & MSDOSFSMNT_RONLY)
926 panic("msdosfs_sync: rofs mod");
928 /* update FATs here */
932 * Write back each (modified) denode.
935 MNT_VNODE_FOREACH_ALL(vp, mp, nvp) {
936 if (vp->v_type == VNON) {
942 (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 &&
943 (vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
944 waitfor == MNT_LAZY)) {
948 error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
950 if (error == ENOENT) {
951 MNT_VNODE_FOREACH_ALL_ABORT(mp, nvp);
956 error = VOP_FSYNC(vp, waitfor, td);
964 * Flush filesystem control info.
966 if (waitfor != MNT_LAZY) {
967 vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY);
968 error = VOP_FSYNC(pmp->pm_devvp, waitfor, td);
971 VOP_UNLOCK(pmp->pm_devvp);
974 error = msdosfs_fsiflush(pmp, waitfor);
978 if (allerror == 0 && waitfor == MNT_SUSPEND) {
980 mp->mnt_kern_flag |= MNTK_SUSPEND2 | MNTK_SUSPENDED;
987 msdosfs_fhtovp(struct mount *mp, struct fid *fhp, int flags, struct vnode **vpp)
989 struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
990 struct defid *defhp = (struct defid *) fhp;
994 error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs,
1001 vnode_create_vobject(*vpp, dep->de_FileSize, curthread);
1005 static struct vfsops msdosfs_vfsops = {
1006 .vfs_fhtovp = msdosfs_fhtovp,
1007 .vfs_mount = msdosfs_mount,
1008 .vfs_cmount = msdosfs_cmount,
1009 .vfs_root = msdosfs_root,
1010 .vfs_statfs = msdosfs_statfs,
1011 .vfs_sync = msdosfs_sync,
1012 .vfs_unmount = msdosfs_unmount,
1015 VFS_SET(msdosfs_vfsops, msdosfs, 0);
1016 MODULE_VERSION(msdosfs, 1);