2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg 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>
53 #include <sys/lockf.h>
54 #include <sys/namei.h>
55 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
56 #include <sys/kernel.h>
60 #include <sys/clock.h>
64 #include <sys/mount.h>
65 #include <sys/unistd.h>
66 #include <sys/vnode.h>
67 #include <sys/malloc.h>
68 #include <sys/dirent.h>
69 #include <sys/signalvar.h>
72 #include <vm/vm_extern.h>
73 #include <vm/vnode_pager.h>
75 #include <machine/mutex.h>
77 #include <fs/msdosfs/bpb.h>
78 #include <fs/msdosfs/msdosfsmount.h>
79 #include <fs/msdosfs/direntry.h>
80 #include <fs/msdosfs/denode.h>
81 #include <fs/msdosfs/fat.h>
83 #define DOS_FILESIZE_MAX 0xffffffff
86 * Prototypes for MSDOSFS vnode operations
88 static vop_advlock_t msdosfs_advlock;
89 static vop_create_t msdosfs_create;
90 static vop_mknod_t msdosfs_mknod;
91 static vop_open_t msdosfs_open;
92 static vop_close_t msdosfs_close;
93 static vop_access_t msdosfs_access;
94 static vop_getattr_t msdosfs_getattr;
95 static vop_setattr_t msdosfs_setattr;
96 static vop_read_t msdosfs_read;
97 static vop_write_t msdosfs_write;
98 static vop_fsync_t msdosfs_fsync;
99 static vop_remove_t msdosfs_remove;
100 static vop_link_t msdosfs_link;
101 static vop_rename_t msdosfs_rename;
102 static vop_mkdir_t msdosfs_mkdir;
103 static vop_rmdir_t msdosfs_rmdir;
104 static vop_symlink_t msdosfs_symlink;
105 static vop_readdir_t msdosfs_readdir;
106 static vop_bmap_t msdosfs_bmap;
107 static vop_strategy_t msdosfs_strategy;
108 static vop_print_t msdosfs_print;
109 static vop_pathconf_t msdosfs_pathconf;
110 static vop_vptofh_t msdosfs_vptofh;
113 * Some general notes:
115 * In the ufs filesystem the inodes, superblocks, and indirect blocks are
116 * read/written using the vnode for the filesystem. Blocks that represent
117 * the contents of a file are read/written using the vnode for the file
118 * (including directories when they are read/written as files). This
119 * presents problems for the dos filesystem because data that should be in
120 * an inode (if dos had them) resides in the directory itself. Since we
121 * must update directory entries without the benefit of having the vnode
122 * for the directory we must use the vnode for the filesystem. This means
123 * that when a directory is actually read/written (via read, write, or
124 * readdir, or seek) we must use the vnode for the filesystem instead of
125 * the vnode for the directory as would happen in ufs. This is to insure we
126 * retreive the correct block from the buffer cache since the hash value is
127 * based upon the vnode address and the desired block number.
131 * Create a regular file. On entry the directory to contain the file being
132 * created is locked. We must release before we return. We must also free
133 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
134 * only if the SAVESTART bit in cn_flags is clear on success.
138 struct vop_create_args /* {
140 struct vnode **a_vpp;
141 struct componentname *a_cnp;
145 struct componentname *cnp = ap->a_cnp;
146 struct denode ndirent;
148 struct denode *pdep = VTODE(ap->a_dvp);
153 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
157 * If this is the root directory and there is no space left we
158 * can't do anything. This is because the root directory can not
161 if (pdep->de_StartCluster == MSDOSFSROOT
162 && pdep->de_fndoffset >= pdep->de_FileSize) {
168 * Create a directory entry for the file, then call createde() to
169 * have it installed. NOTE: DOS files are always executable. We
170 * use the absence of the owner write bit to make the file
174 if ((cnp->cn_flags & HASBUF) == 0)
175 panic("msdosfs_create: no name");
177 bzero(&ndirent, sizeof(ndirent));
178 error = uniqdosname(pdep, cnp, ndirent.de_Name);
182 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
183 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
184 ndirent.de_LowerCase = 0;
185 ndirent.de_StartCluster = 0;
186 ndirent.de_FileSize = 0;
187 ndirent.de_dev = pdep->de_dev;
188 ndirent.de_pmp = pdep->de_pmp;
189 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
191 DETIMES(&ndirent, &ts, &ts, &ts);
192 error = createde(&ndirent, pdep, &dep, cnp);
195 *ap->a_vpp = DETOV(dep);
204 struct vop_mknod_args /* {
206 struct vnode **a_vpp;
207 struct componentname *a_cnp;
216 struct vop_open_args /* {
219 struct ucred *a_cred;
224 struct denode *dep = VTODE(ap->a_vp);
225 vnode_create_vobject(ap->a_vp, dep->de_FileSize, ap->a_td);
231 struct vop_close_args /* {
234 struct ucred *a_cred;
238 struct vnode *vp = ap->a_vp;
239 struct denode *dep = VTODE(vp);
243 if (vp->v_usecount > 1) {
245 DETIMES(dep, &ts, &ts, &ts);
253 struct vop_access_args /* {
256 struct ucred *a_cred;
260 struct vnode *vp = ap->a_vp;
261 struct denode *dep = VTODE(ap->a_vp);
262 struct msdosfsmount *pmp = dep->de_pmp;
263 mode_t file_mode, mode = ap->a_mode;
265 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
266 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
267 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
270 * Disallow write attempts on read-only filesystems;
271 * unless the file is a socket, fifo, or a block or
272 * character device resident on the filesystem.
275 switch (vp->v_type) {
279 if (vp->v_mount->mnt_flag & MNT_RDONLY)
287 return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid,
288 ap->a_mode, ap->a_cred, NULL));
293 struct vop_getattr_args /* {
296 struct ucred *a_cred;
300 struct denode *dep = VTODE(ap->a_vp);
301 struct msdosfsmount *pmp = dep->de_pmp;
302 struct vattr *vap = ap->a_vap;
305 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
309 DETIMES(dep, &ts, &ts, &ts);
310 vap->va_fsid = dev2udev(dep->de_dev);
312 * The following computation of the fileid must be the same as that
313 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
316 if (dep->de_Attributes & ATTR_DIRECTORY) {
317 fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) *
319 if (dep->de_StartCluster == MSDOSFSROOT)
322 fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) *
324 if (dep->de_dirclust == MSDOSFSROOT)
325 fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk;
326 fileid += (uint64_t)dep->de_diroffset / sizeof(struct direntry);
329 if (pmp->pm_flags & MSDOSFS_LARGEFS)
330 vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid);
332 vap->va_fileid = (long)fileid;
334 if ((dep->de_Attributes & ATTR_READONLY) == 0)
335 mode = S_IRWXU|S_IRWXG|S_IRWXO;
337 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
338 vap->va_mode = mode &
339 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
340 vap->va_uid = pmp->pm_uid;
341 vap->va_gid = pmp->pm_gid;
344 vap->va_size = dep->de_FileSize;
345 fattime2timespec(dep->de_MDate, dep->de_MTime, 0, 0, &vap->va_mtime);
346 vap->va_ctime = vap->va_mtime;
347 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
348 fattime2timespec(dep->de_ADate, 0, 0, 0, &vap->va_atime);
349 fattime2timespec(dep->de_CDate, dep->de_CTime, dep->de_CHun,
350 0, &vap->va_birthtime);
352 vap->va_atime = vap->va_mtime;
353 vap->va_birthtime.tv_sec = -1;
354 vap->va_birthtime.tv_nsec = 0;
357 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
358 vap->va_flags |= SF_ARCHIVED;
360 vap->va_blocksize = pmp->pm_bpcluster;
362 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
363 vap->va_type = ap->a_vp->v_type;
364 vap->va_filerev = dep->de_modrev;
370 struct vop_setattr_args /* {
373 struct ucred *a_cred;
377 struct vnode *vp = ap->a_vp;
378 struct denode *dep = VTODE(ap->a_vp);
379 struct msdosfsmount *pmp = dep->de_pmp;
380 struct vattr *vap = ap->a_vap;
381 struct ucred *cred = ap->a_cred;
385 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
386 ap->a_vp, vap, cred, ap->a_td);
390 * Check for unsettable attributes.
392 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
393 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
394 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
395 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
397 printf("msdosfs_setattr(): returning EINVAL\n");
398 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
399 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
400 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
401 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
402 printf(" va_uid %x, va_gid %x\n",
403 vap->va_uid, vap->va_gid);
407 if (vap->va_flags != VNOVAL) {
408 if (vp->v_mount->mnt_flag & MNT_RDONLY)
410 if (cred->cr_uid != pmp->pm_uid) {
411 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
416 * We are very inconsistent about handling unsupported
417 * attributes. We ignored the access time and the
418 * read and execute bits. We were strict for the other
421 * Here we are strict, stricter than ufs in not allowing
422 * users to attempt to set SF_SETTABLE bits or anyone to
423 * set unsupported bits. However, we ignore attempts to
424 * set ATTR_ARCHIVE for directories `cp -pr' from a more
425 * sensible filesystem attempts it a lot.
427 if (vap->va_flags & SF_SETTABLE) {
428 error = priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0);
432 if (vap->va_flags & ~SF_ARCHIVED)
434 if (vap->va_flags & SF_ARCHIVED)
435 dep->de_Attributes &= ~ATTR_ARCHIVE;
436 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
437 dep->de_Attributes |= ATTR_ARCHIVE;
438 dep->de_flag |= DE_MODIFIED;
441 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
445 if (vp->v_mount->mnt_flag & MNT_RDONLY)
448 if (uid == (uid_t)VNOVAL)
451 if (gid == (gid_t)VNOVAL)
453 if (cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
454 (gid != pmp->pm_gid && !groupmember(gid, cred))) {
455 error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0);
459 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
463 if (vap->va_size != VNOVAL) {
465 * Disallow write attempts on read-only filesystems;
466 * unless the file is a socket, fifo, or a block or
467 * character device resident on the filesystem.
469 switch (vp->v_type) {
475 if (vp->v_mount->mnt_flag & MNT_RDONLY)
481 error = detrunc(dep, vap->va_size, 0, cred, ap->a_td);
485 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
486 if (vp->v_mount->mnt_flag & MNT_RDONLY)
488 if (vap->va_vaflags & VA_UTIMES_NULL) {
489 error = VOP_ACCESS(vp, VADMIN, cred, ap->a_td);
491 error = VOP_ACCESS(vp, VWRITE, cred,
494 error = VOP_ACCESS(vp, VADMIN, cred, ap->a_td);
495 if (vp->v_type != VDIR) {
496 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
497 vap->va_atime.tv_sec != VNOVAL) {
498 dep->de_flag &= ~DE_ACCESS;
499 timespec2fattime(&vap->va_atime, 0,
500 &dep->de_ADate, NULL, NULL);
502 if (vap->va_mtime.tv_sec != VNOVAL) {
503 dep->de_flag &= ~DE_UPDATE;
504 timespec2fattime(&vap->va_mtime, 0,
505 &dep->de_MDate, &dep->de_MTime, NULL);
507 dep->de_Attributes |= ATTR_ARCHIVE;
508 dep->de_flag |= DE_MODIFIED;
512 * DOS files only have the ability to have their writability
513 * attribute set, so we use the owner write bit to set the readonly
516 if (vap->va_mode != (mode_t)VNOVAL) {
517 if (vp->v_mount->mnt_flag & MNT_RDONLY)
519 if (cred->cr_uid != pmp->pm_uid) {
520 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
524 if (vp->v_type != VDIR) {
525 /* We ignore the read and execute bits. */
526 if (vap->va_mode & VWRITE)
527 dep->de_Attributes &= ~ATTR_READONLY;
529 dep->de_Attributes |= ATTR_READONLY;
530 dep->de_Attributes |= ATTR_ARCHIVE;
531 dep->de_flag |= DE_MODIFIED;
534 return (deupdat(dep, 1));
539 struct vop_read_args /* {
543 struct ucred *a_cred;
558 struct vnode *vp = ap->a_vp;
559 struct denode *dep = VTODE(vp);
560 struct msdosfsmount *pmp = dep->de_pmp;
561 struct uio *uio = ap->a_uio;
563 if (uio->uio_offset < 0)
566 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
569 * If they didn't ask for any data, then we are done.
571 orig_resid = uio->uio_resid;
575 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
577 isadir = dep->de_Attributes & ATTR_DIRECTORY;
579 if (uio->uio_offset >= dep->de_FileSize)
581 lbn = de_cluster(pmp, uio->uio_offset);
583 * If we are operating on a directory file then be sure to
584 * do i/o with the vnode for the filesystem instead of the
585 * vnode for the directory.
588 /* convert cluster # to block # */
589 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
590 if (error == E2BIG) {
595 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp);
597 blsize = pmp->pm_bpcluster;
600 de_cn2off(pmp, rablock) < dep->de_FileSize) {
601 rasize = pmp->pm_bpcluster;
602 error = breadn(vp, lbn, blsize,
603 &rablock, &rasize, 1, NOCRED, &bp);
605 error = bread(vp, lbn, blsize, NOCRED, &bp);
612 on = uio->uio_offset & pmp->pm_crbomask;
613 diff = pmp->pm_bpcluster - on;
614 n = diff > uio->uio_resid ? uio->uio_resid : diff;
615 diff = dep->de_FileSize - uio->uio_offset;
618 diff = blsize - bp->b_resid;
621 error = uiomove(bp->b_data + on, (int) n, uio);
623 } while (error == 0 && uio->uio_resid > 0 && n != 0);
624 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
625 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
626 dep->de_flag |= DE_ACCESS;
631 * Write data to a file or directory.
635 struct vop_write_args /* {
639 struct ucred *a_cred;
650 int ioflag = ap->a_ioflag;
651 struct uio *uio = ap->a_uio;
652 struct thread *td = uio->uio_td;
653 struct vnode *vp = ap->a_vp;
654 struct vnode *thisvp;
655 struct denode *dep = VTODE(vp);
656 struct msdosfsmount *pmp = dep->de_pmp;
657 struct ucred *cred = ap->a_cred;
660 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
661 vp, uio, ioflag, cred);
662 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
663 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
666 switch (vp->v_type) {
668 if (ioflag & IO_APPEND)
669 uio->uio_offset = dep->de_FileSize;
675 panic("msdosfs_write(): bad file type");
678 if (uio->uio_offset < 0)
681 if (uio->uio_resid == 0)
685 * If they've exceeded their filesize limit, tell them about it.
688 PROC_LOCK(td->td_proc);
689 if ((uoff_t)uio->uio_offset + uio->uio_resid >
690 lim_cur(td->td_proc, RLIMIT_FSIZE)) {
691 psignal(td->td_proc, SIGXFSZ);
692 PROC_UNLOCK(td->td_proc);
695 PROC_UNLOCK(td->td_proc);
698 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
702 * If the offset we are starting the write at is beyond the end of
703 * the file, then they've done a seek. Unix filesystems allow
704 * files with holes in them, DOS doesn't so we must fill the hole
705 * with zeroed blocks.
707 if (uio->uio_offset > dep->de_FileSize) {
708 error = deextend(dep, uio->uio_offset, cred);
714 * Remember some values in case the write fails.
716 resid = uio->uio_resid;
717 osize = dep->de_FileSize;
720 * If we write beyond the end of the file, extend it to its ultimate
721 * size ahead of the time to hopefully get a contiguous area.
723 if (uio->uio_offset + resid > osize) {
724 count = de_clcount(pmp, uio->uio_offset + resid) -
725 de_clcount(pmp, osize);
726 error = extendfile(dep, count, NULL, NULL, 0);
727 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
729 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
731 lastcn = de_clcount(pmp, osize) - 1;
734 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
739 croffset = uio->uio_offset & pmp->pm_crbomask;
740 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
741 if (uio->uio_offset + n > dep->de_FileSize) {
742 dep->de_FileSize = uio->uio_offset + n;
743 /* The object size needs to be set before buffer is allocated */
744 vnode_pager_setsize(vp, dep->de_FileSize);
747 bn = de_cluster(pmp, uio->uio_offset);
748 if ((uio->uio_offset & pmp->pm_crbomask) == 0
749 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
750 > de_cluster(pmp, uio->uio_offset)
751 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
753 * If either the whole cluster gets written,
754 * or we write the cluster from its start beyond EOF,
755 * then no need to read data from disk.
757 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0);
760 * Do the bmap now, since pcbmap needs buffers
761 * for the fat table. (see msdosfs_strategy)
763 if (bp->b_blkno == bp->b_lblkno) {
764 error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0);
770 if (bp->b_blkno == -1) {
773 error = EIO; /* XXX */
778 * The block we need to write into exists, so read it in.
780 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp);
788 * Should these vnode_pager_* functions be done on dir
793 * Copy the data from user space into the buf header.
795 error = uiomove(bp->b_data + croffset, n, uio);
802 * If they want this synchronous then write it and wait for
803 * it. Otherwise, if on a cluster boundary write it
804 * asynchronously so we can move on to the next block
805 * without delay. Otherwise do a delayed write because we
806 * may want to write somemore into the block later.
808 if (ioflag & IO_SYNC)
810 else if (n + croffset == pmp->pm_bpcluster)
814 dep->de_flag |= DE_UPDATE;
815 } while (error == 0 && uio->uio_resid > 0);
818 * If the write failed and they want us to, truncate the file back
819 * to the size it was before the write was attempted.
823 if (ioflag & IO_UNIT) {
824 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL);
825 uio->uio_offset -= resid - uio->uio_resid;
826 uio->uio_resid = resid;
828 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL);
829 if (uio->uio_resid != resid)
832 } else if (ioflag & IO_SYNC)
833 error = deupdat(dep, 1);
838 * Flush the blocks of a file to disk.
840 * This function is worthless for vnodes that represent directories. Maybe we
841 * could just do a sync if they try an fsync on a directory file.
845 struct vop_fsync_args /* {
847 struct ucred *a_cred;
853 * Flush our dirty buffers.
857 return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT));
862 struct vop_remove_args /* {
865 struct componentname *a_cnp;
868 struct denode *dep = VTODE(ap->a_vp);
869 struct denode *ddep = VTODE(ap->a_dvp);
872 if (ap->a_vp->v_type == VDIR)
875 error = removede(ddep, dep);
877 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
883 * DOS filesystems don't know what links are.
887 struct vop_link_args /* {
888 struct vnode *a_tdvp;
890 struct componentname *a_cnp;
897 * Renames on files require moving the denode to a new hash queue since the
898 * denode's location is used to compute which hash queue to put the file
899 * in. Unless it is a rename in place. For example "mv a b".
901 * What follows is the basic algorithm:
904 * if (dest file exists) {
907 * if (dest and src in same directory) {
908 * rewrite name in existing directory slot
910 * write new entry in dest directory
911 * update offset and dirclust in denode
912 * move denode to new hash chain
913 * clear old directory entry
917 * if (dest directory exists) {
918 * if (dest is not empty) {
921 * remove dest directory
923 * if (dest and src in same directory) {
924 * rewrite name in existing entry
926 * be sure dest is not a child of src directory
927 * write entry in dest directory
928 * update "." and ".." in moved directory
929 * clear old directory entry for moved directory
934 * source's parent directory is unlocked
935 * source file or directory is unlocked
936 * destination's parent directory is locked
937 * destination file or directory is locked if it exists
940 * all denodes should be released
944 struct vop_rename_args /* {
945 struct vnode *a_fdvp;
947 struct componentname *a_fcnp;
948 struct vnode *a_tdvp;
950 struct componentname *a_tcnp;
953 struct vnode *tdvp = ap->a_tdvp;
954 struct vnode *fvp = ap->a_fvp;
955 struct vnode *fdvp = ap->a_fdvp;
956 struct vnode *tvp = ap->a_tvp;
957 struct componentname *tcnp = ap->a_tcnp;
958 struct componentname *fcnp = ap->a_fcnp;
959 struct thread *td = fcnp->cn_thread;
960 struct denode *ip, *xp, *dp, *zp;
961 u_char toname[11], oldname[11];
962 u_long from_diroffset, to_diroffset;
964 int doingdirectory = 0, newparent = 0;
968 struct denode *fddep; /* from file's parent directory */
969 struct msdosfsmount *pmp;
970 struct direntry *dotdotp;
973 fddep = VTODE(ap->a_fdvp);
976 pmp = VFSTOMSDOSFS(fdvp->v_mount);
979 if ((tcnp->cn_flags & HASBUF) == 0 ||
980 (fcnp->cn_flags & HASBUF) == 0)
981 panic("msdosfs_rename: no name");
984 * Check for cross-device rename.
986 if ((fvp->v_mount != tdvp->v_mount) ||
987 (tvp && (fvp->v_mount != tvp->v_mount))) {
1002 * If source and dest are the same, do nothing.
1009 error = vn_lock(fvp, LK_EXCLUSIVE, td);
1016 * Be sure we are not renaming ".", "..", or an alias of ".". This
1017 * leads to a crippled directory tree. It's pretty tough to do a
1018 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1019 * doesn't work if the ".." entry is missing.
1021 if (ip->de_Attributes & ATTR_DIRECTORY) {
1023 * Avoid ".", "..", and aliases of "." for obvious reasons.
1025 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1027 (fcnp->cn_flags & ISDOTDOT) ||
1028 (tcnp->cn_flags & ISDOTDOT) ||
1029 (ip->de_flag & DE_RENAME)) {
1030 VOP_UNLOCK(fvp, 0, td);
1034 ip->de_flag |= DE_RENAME;
1039 * When the target exists, both the directory
1040 * and target vnodes are returned locked.
1043 xp = tvp ? VTODE(tvp) : NULL;
1045 * Remember direntry place to use for destination
1047 to_diroffset = dp->de_fndoffset;
1048 to_count = dp->de_fndcnt;
1051 * If ".." must be changed (ie the directory gets a new
1052 * parent) then the source directory must not be in the
1053 * directory heirarchy above the target, as this would
1054 * orphan everything below the source directory. Also
1055 * the user must have write permission in the source so
1056 * as to be able to change "..". We must repeat the call
1057 * to namei, as the parent directory is unlocked by the
1058 * call to doscheckpath().
1060 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
1061 VOP_UNLOCK(fvp, 0, td);
1062 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1064 if (doingdirectory && newparent) {
1065 if (error) /* write access check above */
1070 * doscheckpath() vput()'s dp,
1071 * so we have to do a relookup afterwards
1073 error = doscheckpath(ip, dp);
1076 if ((tcnp->cn_flags & SAVESTART) == 0)
1077 panic("msdosfs_rename: lost to startdir");
1078 error = relookup(tdvp, &tvp, tcnp);
1082 xp = tvp ? VTODE(tvp) : NULL;
1087 * Target must be empty if a directory and have no links
1088 * to it. Also, ensure source and target are compatible
1089 * (both directories, or both not directories).
1091 if (xp->de_Attributes & ATTR_DIRECTORY) {
1092 if (!dosdirempty(xp)) {
1096 if (!doingdirectory) {
1101 } else if (doingdirectory) {
1105 error = removede(dp, xp);
1113 * Convert the filename in tcnp into a dos filename. We copy this
1114 * into the denode and directory entry for the destination
1117 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1122 * Since from wasn't locked at various places above,
1123 * have to do a relookup here.
1125 fcnp->cn_flags &= ~MODMASK;
1126 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1127 if ((fcnp->cn_flags & SAVESTART) == 0)
1128 panic("msdosfs_rename: lost from startdir");
1130 VOP_UNLOCK(tdvp, 0, td);
1131 if (relookup(fdvp, &fvp, fcnp) == 0)
1135 * From name has disappeared.
1138 panic("rename: lost dir entry");
1140 VOP_UNLOCK(tdvp, 0, td);
1147 from_diroffset = zp->de_fndoffset;
1150 * Ensure that the directory entry still exists and has not
1151 * changed till now. If the source is a file the entry may
1152 * have been unlinked or renamed. In either case there is
1153 * no further work to be done. If the source is a directory
1154 * then it cannot have been rmdir'ed or renamed; this is
1155 * prohibited by the DE_RENAME flag.
1159 panic("rename: lost dir entry");
1160 VOP_UNLOCK(fvp, 0, td);
1162 VOP_UNLOCK(fdvp, 0, td);
1170 * First write a new entry in the destination
1171 * directory and mark the entry in the source directory
1172 * as deleted. Then move the denode to the correct hash
1173 * chain for its new location in the filesystem. And, if
1174 * we moved a directory, then update its .. entry to point
1175 * to the new parent directory.
1177 bcopy(ip->de_Name, oldname, 11);
1178 bcopy(toname, ip->de_Name, 11); /* update denode */
1179 dp->de_fndoffset = to_diroffset;
1180 dp->de_fndcnt = to_count;
1181 error = createde(ip, dp, (struct denode **)0, tcnp);
1183 bcopy(oldname, ip->de_Name, 11);
1185 VOP_UNLOCK(fdvp, 0, td);
1186 VOP_UNLOCK(fvp, 0, td);
1190 zp->de_fndoffset = from_diroffset;
1191 error = removede(zp, ip);
1193 /* XXX should downgrade to ro here, fs is corrupt */
1195 VOP_UNLOCK(fdvp, 0, td);
1196 VOP_UNLOCK(fvp, 0, td);
1199 if (!doingdirectory) {
1200 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1201 &ip->de_dirclust, 0);
1203 /* XXX should downgrade to ro here, fs is corrupt */
1205 VOP_UNLOCK(fdvp, 0, td);
1206 VOP_UNLOCK(fvp, 0, td);
1209 if (ip->de_dirclust == MSDOSFSROOT)
1210 ip->de_diroffset = to_diroffset;
1212 ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
1216 VOP_UNLOCK(fdvp, 0, td);
1220 * If we moved a directory to a new parent directory, then we must
1221 * fixup the ".." entry in the moved directory.
1223 if (doingdirectory && newparent) {
1224 cn = ip->de_StartCluster;
1225 if (cn == MSDOSFSROOT) {
1226 /* this should never happen */
1227 panic("msdosfs_rename(): updating .. in root directory?");
1229 bn = cntobn(pmp, cn);
1230 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,
1233 /* XXX should downgrade to ro here, fs is corrupt */
1235 VOP_UNLOCK(fvp, 0, td);
1238 dotdotp = (struct direntry *)bp->b_data + 1;
1239 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1241 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1244 /* XXX should downgrade to ro here, fs is corrupt */
1245 VOP_UNLOCK(fvp, 0, td);
1250 VOP_UNLOCK(fvp, 0, td);
1256 ip->de_flag &= ~DE_RENAME;
1264 struct direntry dot;
1265 struct direntry dotdot;
1266 } dosdirtemplate = {
1267 { ". ", " ", /* the . entry */
1268 ATTR_DIRECTORY, /* file attribute */
1270 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1271 { 0, 0 }, /* access date */
1272 { 0, 0 }, /* high bits of start cluster */
1273 { 210, 4 }, { 210, 4 }, /* modify time & date */
1274 { 0, 0 }, /* startcluster */
1275 { 0, 0, 0, 0 } /* filesize */
1277 { ".. ", " ", /* the .. entry */
1278 ATTR_DIRECTORY, /* file attribute */
1280 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1281 { 0, 0 }, /* access date */
1282 { 0, 0 }, /* high bits of start cluster */
1283 { 210, 4 }, { 210, 4 }, /* modify time & date */
1284 { 0, 0 }, /* startcluster */
1285 { 0, 0, 0, 0 } /* filesize */
1291 struct vop_mkdir_args /* {
1292 struct vnode *a_dvp;
1293 struvt vnode **a_vpp;
1294 struvt componentname *a_cnp;
1295 struct vattr *a_vap;
1298 struct componentname *cnp = ap->a_cnp;
1300 struct denode *pdep = VTODE(ap->a_dvp);
1301 struct direntry *denp;
1302 struct msdosfsmount *pmp = pdep->de_pmp;
1304 u_long newcluster, pcl;
1307 struct denode ndirent;
1311 * If this is the root directory and there is no space left we
1312 * can't do anything. This is because the root directory can not
1315 if (pdep->de_StartCluster == MSDOSFSROOT
1316 && pdep->de_fndoffset >= pdep->de_FileSize) {
1322 * Allocate a cluster to hold the about to be created directory.
1324 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1328 bzero(&ndirent, sizeof(ndirent));
1329 ndirent.de_pmp = pmp;
1330 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1332 DETIMES(&ndirent, &ts, &ts, &ts);
1335 * Now fill the cluster with the "." and ".." entries. And write
1336 * the cluster to disk. This way it is there for the parent
1337 * directory to be pointing at if there were a crash.
1339 bn = cntobn(pmp, newcluster);
1340 /* always succeeds */
1341 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0);
1342 bzero(bp->b_data, pmp->pm_bpcluster);
1343 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1344 denp = (struct direntry *)bp->b_data;
1345 putushort(denp[0].deStartCluster, newcluster);
1346 putushort(denp[0].deCDate, ndirent.de_CDate);
1347 putushort(denp[0].deCTime, ndirent.de_CTime);
1348 denp[0].deCHundredth = ndirent.de_CHun;
1349 putushort(denp[0].deADate, ndirent.de_ADate);
1350 putushort(denp[0].deMDate, ndirent.de_MDate);
1351 putushort(denp[0].deMTime, ndirent.de_MTime);
1352 pcl = pdep->de_StartCluster;
1353 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1355 putushort(denp[1].deStartCluster, pcl);
1356 putushort(denp[1].deCDate, ndirent.de_CDate);
1357 putushort(denp[1].deCTime, ndirent.de_CTime);
1358 denp[1].deCHundredth = ndirent.de_CHun;
1359 putushort(denp[1].deADate, ndirent.de_ADate);
1360 putushort(denp[1].deMDate, ndirent.de_MDate);
1361 putushort(denp[1].deMTime, ndirent.de_MTime);
1363 putushort(denp[0].deHighClust, newcluster >> 16);
1364 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1372 * Now build up a directory entry pointing to the newly allocated
1373 * cluster. This will be written to an empty slot in the parent
1377 if ((cnp->cn_flags & HASBUF) == 0)
1378 panic("msdosfs_mkdir: no name");
1380 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1384 ndirent.de_Attributes = ATTR_DIRECTORY;
1385 ndirent.de_LowerCase = 0;
1386 ndirent.de_StartCluster = newcluster;
1387 ndirent.de_FileSize = 0;
1388 ndirent.de_dev = pdep->de_dev;
1389 error = createde(&ndirent, pdep, &dep, cnp);
1392 *ap->a_vpp = DETOV(dep);
1396 clusterfree(pmp, newcluster, NULL);
1403 struct vop_rmdir_args /* {
1404 struct vnode *a_dvp;
1406 struct componentname *a_cnp;
1409 struct vnode *vp = ap->a_vp;
1410 struct vnode *dvp = ap->a_dvp;
1411 struct componentname *cnp = ap->a_cnp;
1412 struct denode *ip, *dp;
1413 struct thread *td = cnp->cn_thread;
1420 * Verify the directory is empty (and valid).
1421 * (Rmdir ".." won't be valid since
1422 * ".." will contain a reference to
1423 * the current directory and thus be
1427 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1432 * Delete the entry from the directory. For dos filesystems this
1433 * gets rid of the directory entry on disk, the in memory copy
1434 * still exists but the de_refcnt is <= 0. This prevents it from
1435 * being found by deget(). When the vput() on dep is done we give
1436 * up access and eventually msdosfs_reclaim() will be called which
1437 * will remove it from the denode cache.
1439 error = removede(dp, ip);
1443 * This is where we decrement the link count in the parent
1444 * directory. Since dos filesystems don't do this we just purge
1448 VOP_UNLOCK(dvp, 0, td);
1450 * Truncate the directory that is being deleted.
1452 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td);
1455 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
1461 * DOS filesystems don't know what symlinks are.
1465 struct vop_symlink_args /* {
1466 struct vnode *a_dvp;
1467 struct vnode **a_vpp;
1468 struct componentname *a_cnp;
1469 struct vattr *a_vap;
1473 return (EOPNOTSUPP);
1478 struct vop_readdir_args /* {
1481 struct ucred *a_cred;
1498 struct denode *dep = VTODE(ap->a_vp);
1499 struct msdosfsmount *pmp = dep->de_pmp;
1500 struct direntry *dentp;
1501 struct dirent dirbuf;
1502 struct uio *uio = ap->a_uio;
1503 u_long *cookies = NULL;
1508 #ifdef MSDOSFS_DEBUG
1509 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1510 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1514 * msdosfs_readdir() won't operate properly on regular files since
1515 * it does i/o only with the the filesystem vnode, and hence can
1516 * retrieve the wrong block from the buffer cache for a plain file.
1517 * So, fail attempts to readdir() on a plain file.
1519 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1523 * To be safe, initialize dirbuf
1525 bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
1528 * If the user buffer is smaller than the size of one dos directory
1529 * entry or the file offset is not a multiple of the size of a
1530 * directory entry, then we fail the read.
1532 off = offset = uio->uio_offset;
1533 if (uio->uio_resid < sizeof(struct direntry) ||
1534 (offset & (sizeof(struct direntry) - 1)))
1537 if (ap->a_ncookies) {
1538 ncookies = uio->uio_resid / 16;
1539 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1541 *ap->a_cookies = cookies;
1542 *ap->a_ncookies = ncookies;
1545 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1548 * If they are reading from the root directory then, we simulate
1549 * the . and .. entries since these don't exist in the root
1550 * directory. We also set the offset bias to make up for having to
1551 * simulate these entries. By this I mean that at file offset 64 we
1552 * read the first entry in the root directory that lives on disk.
1554 if (dep->de_StartCluster == MSDOSFSROOT
1555 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1557 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1560 bias = 2 * sizeof(struct direntry);
1561 if (offset < bias) {
1562 for (n = (int)offset / sizeof(struct direntry);
1565 fileno = (uint64_t)cntobn(pmp,
1570 if (pmp->pm_flags & MSDOSFS_LARGEFS) {
1572 msdosfs_fileno_map(pmp->pm_mountp,
1576 dirbuf.d_fileno = (uint32_t)fileno;
1578 dirbuf.d_type = DT_DIR;
1581 dirbuf.d_namlen = 1;
1582 strcpy(dirbuf.d_name, ".");
1585 dirbuf.d_namlen = 2;
1586 strcpy(dirbuf.d_name, "..");
1589 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1590 if (uio->uio_resid < dirbuf.d_reclen)
1592 error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
1595 offset += sizeof(struct direntry);
1598 *cookies++ = offset;
1599 if (--ncookies <= 0)
1608 while (uio->uio_resid > 0) {
1609 lbn = de_cluster(pmp, offset - bias);
1610 on = (offset - bias) & pmp->pm_crbomask;
1611 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1612 diff = dep->de_FileSize - (offset - bias);
1616 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1619 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp);
1624 n = min(n, blsize - bp->b_resid);
1631 * Convert from dos directory entries to fs-independent
1632 * directory entries.
1634 for (dentp = (struct direntry *)(bp->b_data + on);
1635 (char *)dentp < bp->b_data + on + n;
1636 dentp++, offset += sizeof(struct direntry)) {
1638 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1639 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1642 * If this is an unused entry, we can stop.
1644 if (dentp->deName[0] == SLOT_EMPTY) {
1649 * Skip deleted entries.
1651 if (dentp->deName[0] == SLOT_DELETED) {
1658 * Handle Win95 long directory entries
1660 if (dentp->deAttributes == ATTR_WIN95) {
1661 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1663 chksum = win2unixfn((struct winentry *)dentp,
1669 * Skip volume labels
1671 if (dentp->deAttributes & ATTR_VOLUME) {
1677 * This computation of d_fileno must match
1678 * the computation of va_fileid in
1681 if (dentp->deAttributes & ATTR_DIRECTORY) {
1682 fileno = getushort(dentp->deStartCluster);
1684 fileno |= getushort(dentp->deHighClust) << 16;
1685 /* if this is the root directory */
1686 if (fileno == MSDOSFSROOT)
1688 fileno = (uint64_t)cntobn(pmp,
1694 fileno = (uint64_t)cntobn(pmp, fileno) *
1696 dirbuf.d_type = DT_DIR;
1698 fileno = (uint64_t)offset / sizeof(struct direntry);
1699 dirbuf.d_type = DT_REG;
1701 if (pmp->pm_flags & MSDOSFS_LARGEFS) {
1703 msdosfs_fileno_map(pmp->pm_mountp, fileno);
1705 dirbuf.d_fileno = (uint32_t)fileno;
1707 if (chksum != winChksum(dentp)) {
1708 dirbuf.d_namlen = dos2unixfn(dentp->deName,
1709 (u_char *)dirbuf.d_name,
1710 dentp->deLowerCase |
1711 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1712 (LCASE_BASE | LCASE_EXT) : 0),
1716 mbnambuf_flush(&dirbuf);
1718 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1719 if (uio->uio_resid < dirbuf.d_reclen) {
1723 error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
1729 *cookies++ = offset + sizeof(struct direntry);
1730 if (--ncookies <= 0) {
1735 off = offset + sizeof(struct direntry);
1740 /* Subtract unused cookies */
1742 *ap->a_ncookies -= ncookies;
1744 uio->uio_offset = off;
1747 * Set the eofflag (NFS uses it)
1749 if (ap->a_eofflag) {
1750 if (dep->de_FileSize - (offset - bias) <= 0)
1759 * vp - address of vnode file the file
1760 * bn - which cluster we are interested in mapping to a filesystem block number.
1761 * vpp - returns the vnode for the block special file holding the filesystem
1762 * containing the file of interest
1763 * bnp - address of where to return the filesystem relative block number
1767 struct vop_bmap_args /* {
1770 struct bufobj **a_bop;
1776 struct denode *dep = VTODE(ap->a_vp);
1780 if (ap->a_bop != NULL)
1781 *ap->a_bop = &dep->de_pmp->pm_devvp->v_bufobj;
1782 if (ap->a_bnp == NULL)
1786 * Sequential clusters should be counted here.
1793 error = pcbmap(dep, ap->a_bn, &blkno, 0, 0);
1799 msdosfs_strategy(ap)
1800 struct vop_strategy_args /* {
1805 struct buf *bp = ap->a_bp;
1806 struct denode *dep = VTODE(ap->a_vp);
1812 * If we don't already know the filesystem relative block number
1813 * then get it using pcbmap(). If pcbmap() returns the block
1814 * number as -1 then we've got a hole in the file. DOS filesystems
1815 * don't allow files with holes, so we shouldn't ever see this.
1817 if (bp->b_blkno == bp->b_lblkno) {
1818 error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0);
1819 bp->b_blkno = blkno;
1821 bp->b_error = error;
1822 bp->b_ioflags |= BIO_ERROR;
1826 if ((long)bp->b_blkno == -1)
1829 if (bp->b_blkno == -1) {
1834 * Read/write the block from/to the disk that contains the desired
1837 bp->b_iooffset = dbtob(bp->b_blkno);
1838 bo = dep->de_pmp->pm_bo;
1839 BO_STRATEGY(bo, bp);
1845 struct vop_print_args /* {
1849 struct denode *dep = VTODE(ap->a_vp);
1851 printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ",
1852 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1853 printf("on dev %s\n", devtoname(dep->de_dev));
1858 msdosfs_pathconf(ap)
1859 struct vop_pathconf_args /* {
1865 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1867 switch (ap->a_name) {
1872 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1875 *ap->a_retval = PATH_MAX;
1877 case _PC_CHOWN_RESTRICTED:
1891 struct vop_advlock_args /* {
1899 struct denode *dep = VTODE(ap->a_vp);
1901 return (lf_advlock(ap, &dep->de_lockf, dep->de_FileSize));
1906 struct vop_vptofh_args /* {
1912 struct defid *defhp;
1914 dep = VTODE(ap->a_vp);
1915 defhp = (struct defid *)ap->a_fhp;
1916 defhp->defid_len = sizeof(struct defid);
1917 defhp->defid_dirclust = dep->de_dirclust;
1918 defhp->defid_dirofs = dep->de_diroffset;
1919 /* defhp->defid_gen = dep->de_gen; */
1923 /* Global vfs data structures for msdosfs */
1924 struct vop_vector msdosfs_vnodeops = {
1925 .vop_default = &default_vnodeops,
1927 .vop_access = msdosfs_access,
1928 .vop_advlock = msdosfs_advlock,
1929 .vop_bmap = msdosfs_bmap,
1930 .vop_cachedlookup = msdosfs_lookup,
1931 .vop_open = msdosfs_open,
1932 .vop_close = msdosfs_close,
1933 .vop_create = msdosfs_create,
1934 .vop_fsync = msdosfs_fsync,
1935 .vop_getattr = msdosfs_getattr,
1936 .vop_inactive = msdosfs_inactive,
1937 .vop_link = msdosfs_link,
1938 .vop_lookup = vfs_cache_lookup,
1939 .vop_mkdir = msdosfs_mkdir,
1940 .vop_mknod = msdosfs_mknod,
1941 .vop_pathconf = msdosfs_pathconf,
1942 .vop_print = msdosfs_print,
1943 .vop_read = msdosfs_read,
1944 .vop_readdir = msdosfs_readdir,
1945 .vop_reclaim = msdosfs_reclaim,
1946 .vop_remove = msdosfs_remove,
1947 .vop_rename = msdosfs_rename,
1948 .vop_rmdir = msdosfs_rmdir,
1949 .vop_setattr = msdosfs_setattr,
1950 .vop_strategy = msdosfs_strategy,
1951 .vop_symlink = msdosfs_symlink,
1952 .vop_write = msdosfs_write,
1953 .vop_vptofh = msdosfs_vptofh,