1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */
2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.2 2003/06/17 04:28:47 dillon Exp $ */
3 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by TooLs GmbH.
22 * 4. The name of TooLs GmbH may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
42 * This software is provided "as is".
44 * The author supplies this software to be publicly redistributed on the
45 * understanding that the author is not responsible for the correct
46 * functioning of this software in any circumstances and is not liable for
47 * any damages caused by this software.
52 #include <sys/param.h>
53 #include <sys/systm.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/mount.h>
61 #include <sys/unistd.h>
62 #include <sys/vnode.h>
63 #include <sys/malloc.h>
64 #include <sys/dirent.h>
65 #include <sys/signalvar.h>
68 #include <vm/vm_extern.h>
69 #include <vm/vm_zone.h>
70 #include <vm/vnode_pager.h>
72 #include <msdosfs/bpb.h>
73 #include <msdosfs/direntry.h>
74 #include <msdosfs/denode.h>
75 #include <msdosfs/msdosfsmount.h>
76 #include <msdosfs/fat.h>
78 #define DOS_FILESIZE_MAX 0xffffffff
81 * Prototypes for MSDOSFS vnode operations
83 static int msdosfs_create __P((struct vop_create_args *));
84 static int msdosfs_mknod __P((struct vop_mknod_args *));
85 static int msdosfs_close __P((struct vop_close_args *));
86 static int msdosfs_access __P((struct vop_access_args *));
87 static int msdosfs_getattr __P((struct vop_getattr_args *));
88 static int msdosfs_setattr __P((struct vop_setattr_args *));
89 static int msdosfs_read __P((struct vop_read_args *));
90 static int msdosfs_write __P((struct vop_write_args *));
91 static int msdosfs_fsync __P((struct vop_fsync_args *));
92 static int msdosfs_remove __P((struct vop_remove_args *));
93 static int msdosfs_link __P((struct vop_link_args *));
94 static int msdosfs_rename __P((struct vop_rename_args *));
95 static int msdosfs_mkdir __P((struct vop_mkdir_args *));
96 static int msdosfs_rmdir __P((struct vop_rmdir_args *));
97 static int msdosfs_symlink __P((struct vop_symlink_args *));
98 static int msdosfs_readdir __P((struct vop_readdir_args *));
99 static int msdosfs_bmap __P((struct vop_bmap_args *));
100 static int msdosfs_strategy __P((struct vop_strategy_args *));
101 static int msdosfs_print __P((struct vop_print_args *));
102 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap));
103 static int msdosfs_getpages __P((struct vop_getpages_args *));
104 static int msdosfs_putpages __P((struct vop_putpages_args *));
107 * Some general notes:
109 * In the ufs filesystem the inodes, superblocks, and indirect blocks are
110 * read/written using the vnode for the filesystem. Blocks that represent
111 * the contents of a file are read/written using the vnode for the file
112 * (including directories when they are read/written as files). This
113 * presents problems for the dos filesystem because data that should be in
114 * an inode (if dos had them) resides in the directory itself. Since we
115 * must update directory entries without the benefit of having the vnode
116 * for the directory we must use the vnode for the filesystem. This means
117 * that when a directory is actually read/written (via read, write, or
118 * readdir, or seek) we must use the vnode for the filesystem instead of
119 * the vnode for the directory as would happen in ufs. This is to insure we
120 * retreive the correct block from the buffer cache since the hash value is
121 * based upon the vnode address and the desired block number.
125 * Create a regular file. On entry the directory to contain the file being
126 * created is locked. We must release before we return. We must also free
127 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
128 * only if the SAVESTART bit in cn_flags is clear on success.
132 struct vop_create_args /* {
134 struct vnode **a_vpp;
135 struct componentname *a_cnp;
139 struct componentname *cnp = ap->a_cnp;
140 struct denode ndirent;
142 struct denode *pdep = VTODE(ap->a_dvp);
147 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
151 * If this is the root directory and there is no space left we
152 * can't do anything. This is because the root directory can not
155 if (pdep->de_StartCluster == MSDOSFSROOT
156 && pdep->de_fndoffset >= pdep->de_FileSize) {
162 * Create a directory entry for the file, then call createde() to
163 * have it installed. NOTE: DOS files are always executable. We
164 * use the absence of the owner write bit to make the file
168 if ((cnp->cn_flags & HASBUF) == 0)
169 panic("msdosfs_create: no name");
171 bzero(&ndirent, sizeof(ndirent));
172 error = uniqdosname(pdep, cnp, ndirent.de_Name);
176 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
177 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
178 ndirent.de_LowerCase = 0;
179 ndirent.de_StartCluster = 0;
180 ndirent.de_FileSize = 0;
181 ndirent.de_dev = pdep->de_dev;
182 ndirent.de_devvp = pdep->de_devvp;
183 ndirent.de_pmp = pdep->de_pmp;
184 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
186 DETIMES(&ndirent, &ts, &ts, &ts);
187 error = createde(&ndirent, pdep, &dep, cnp);
190 *ap->a_vpp = DETOV(dep);
199 struct vop_mknod_args /* {
201 struct vnode **a_vpp;
202 struct componentname *a_cnp;
207 switch (ap->a_vap->va_type) {
209 return (msdosfs_mkdir((struct vop_mkdir_args *)ap));
213 return (msdosfs_create((struct vop_create_args *)ap));
224 struct vop_close_args /* {
227 struct ucred *a_cred;
231 struct vnode *vp = ap->a_vp;
232 struct denode *dep = VTODE(vp);
235 simple_lock(&vp->v_interlock);
236 if (vp->v_usecount > 1) {
238 DETIMES(dep, &ts, &ts, &ts);
240 simple_unlock(&vp->v_interlock);
246 struct vop_access_args /* {
249 struct ucred *a_cred;
253 struct vnode *vp = ap->a_vp;
254 struct denode *dep = VTODE(ap->a_vp);
255 struct msdosfsmount *pmp = dep->de_pmp;
256 struct ucred *cred = ap->a_cred;
257 mode_t mask, file_mode, mode = ap->a_mode;
261 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
262 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
263 file_mode &= pmp->pm_mask;
266 * Disallow write attempts on read-only file systems;
267 * unless the file is a socket, fifo, or a block or
268 * character device resident on the file system.
271 switch (vp->v_type) {
275 if (vp->v_mount->mnt_flag & MNT_RDONLY)
283 /* User id 0 always gets access. */
284 if (cred->cr_uid == 0)
289 /* Otherwise, check the owner. */
290 if (cred->cr_uid == pmp->pm_uid) {
297 return (file_mode & mask) == mask ? 0 : EACCES;
300 /* Otherwise, check the groups. */
301 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
302 if (pmp->pm_gid == *gp) {
309 return (file_mode & mask) == mask ? 0 : EACCES;
312 /* Otherwise, check everyone else. */
319 return (file_mode & mask) == mask ? 0 : EACCES;
324 struct vop_getattr_args /* {
327 struct ucred *a_cred;
331 struct denode *dep = VTODE(ap->a_vp);
332 struct msdosfsmount *pmp = dep->de_pmp;
333 struct vattr *vap = ap->a_vap;
336 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
340 DETIMES(dep, &ts, &ts, &ts);
341 vap->va_fsid = dev2udev(dep->de_dev);
343 * The following computation of the fileid must be the same as that
344 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
347 if (dep->de_Attributes & ATTR_DIRECTORY) {
348 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
349 if (dep->de_StartCluster == MSDOSFSROOT)
352 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
353 if (dep->de_dirclust == MSDOSFSROOT)
354 fileid = roottobn(pmp, 0) * dirsperblk;
355 fileid += dep->de_diroffset / sizeof(struct direntry);
357 vap->va_fileid = fileid;
358 if ((dep->de_Attributes & ATTR_READONLY) == 0)
359 mode = S_IRWXU|S_IRWXG|S_IRWXO;
361 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
362 vap->va_mode = mode & pmp->pm_mask;
363 vap->va_uid = pmp->pm_uid;
364 vap->va_gid = pmp->pm_gid;
367 vap->va_size = dep->de_FileSize;
368 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
369 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
370 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
371 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
373 vap->va_atime = vap->va_mtime;
374 vap->va_ctime = vap->va_mtime;
377 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
378 vap->va_flags |= SF_ARCHIVED;
380 vap->va_blocksize = pmp->pm_bpcluster;
382 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
383 vap->va_type = ap->a_vp->v_type;
384 vap->va_filerev = dep->de_modrev;
390 struct vop_setattr_args /* {
393 struct ucred *a_cred;
397 struct vnode *vp = ap->a_vp;
398 struct denode *dep = VTODE(ap->a_vp);
399 struct msdosfsmount *pmp = dep->de_pmp;
400 struct vattr *vap = ap->a_vap;
401 struct ucred *cred = ap->a_cred;
405 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
406 ap->a_vp, vap, cred, ap->a_p);
410 * Check for unsettable attributes.
412 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
413 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
414 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
415 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
417 printf("msdosfs_setattr(): returning EINVAL\n");
418 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
419 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
420 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
421 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
422 printf(" va_uid %x, va_gid %x\n",
423 vap->va_uid, vap->va_gid);
427 if (vap->va_flags != VNOVAL) {
428 if (vp->v_mount->mnt_flag & MNT_RDONLY)
430 if (cred->cr_uid != pmp->pm_uid &&
431 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
434 * We are very inconsistent about handling unsupported
435 * attributes. We ignored the access time and the
436 * read and execute bits. We were strict for the other
439 * Here we are strict, stricter than ufs in not allowing
440 * users to attempt to set SF_SETTABLE bits or anyone to
441 * set unsupported bits. However, we ignore attempts to
442 * set ATTR_ARCHIVE for directories `cp -pr' from a more
443 * sensible file system attempts it a lot.
445 if (cred->cr_uid != 0) {
446 if (vap->va_flags & SF_SETTABLE)
449 if (vap->va_flags & ~SF_ARCHIVED)
451 if (vap->va_flags & SF_ARCHIVED)
452 dep->de_Attributes &= ~ATTR_ARCHIVE;
453 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
454 dep->de_Attributes |= ATTR_ARCHIVE;
455 dep->de_flag |= DE_MODIFIED;
458 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
462 if (vp->v_mount->mnt_flag & MNT_RDONLY)
465 if (uid == (uid_t)VNOVAL)
468 if (gid == (gid_t)VNOVAL)
470 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
471 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
472 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
474 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
478 if (vap->va_size != VNOVAL) {
480 * Disallow write attempts on read-only file systems;
481 * unless the file is a socket, fifo, or a block or
482 * character device resident on the file system.
484 switch (vp->v_type) {
490 if (vp->v_mount->mnt_flag & MNT_RDONLY)
496 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p);
500 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
501 if (vp->v_mount->mnt_flag & MNT_RDONLY)
503 if (cred->cr_uid != pmp->pm_uid &&
504 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)) &&
505 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
506 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p))))
508 if (vp->v_type != VDIR) {
509 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
510 vap->va_atime.tv_sec != VNOVAL) {
511 dep->de_flag &= ~DE_ACCESS;
512 unix2dostime(&vap->va_atime, &dep->de_ADate,
515 if (vap->va_mtime.tv_sec != VNOVAL) {
516 dep->de_flag &= ~DE_UPDATE;
517 unix2dostime(&vap->va_mtime, &dep->de_MDate,
518 &dep->de_MTime, NULL);
520 dep->de_Attributes |= ATTR_ARCHIVE;
521 dep->de_flag |= DE_MODIFIED;
525 * DOS files only have the ability to have their writability
526 * attribute set, so we use the owner write bit to set the readonly
529 if (vap->va_mode != (mode_t)VNOVAL) {
530 if (vp->v_mount->mnt_flag & MNT_RDONLY)
532 if (cred->cr_uid != pmp->pm_uid &&
533 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
535 if (vp->v_type != VDIR) {
536 /* We ignore the read and execute bits. */
537 if (vap->va_mode & VWRITE)
538 dep->de_Attributes &= ~ATTR_READONLY;
540 dep->de_Attributes |= ATTR_READONLY;
541 dep->de_Attributes |= ATTR_ARCHIVE;
542 dep->de_flag |= DE_MODIFIED;
545 return (deupdat(dep, 1));
550 struct vop_read_args /* {
554 struct ucred *a_cred;
569 struct vnode *vp = ap->a_vp;
570 struct denode *dep = VTODE(vp);
571 struct msdosfsmount *pmp = dep->de_pmp;
572 struct uio *uio = ap->a_uio;
574 if (uio->uio_offset < 0)
577 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
580 * If they didn't ask for any data, then we are done.
582 orig_resid = uio->uio_resid;
586 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
588 isadir = dep->de_Attributes & ATTR_DIRECTORY;
590 if (uio->uio_offset >= dep->de_FileSize)
592 lbn = de_cluster(pmp, uio->uio_offset);
594 * If we are operating on a directory file then be sure to
595 * do i/o with the vnode for the filesystem instead of the
596 * vnode for the directory.
599 /* convert cluster # to block # */
600 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
601 if (error == E2BIG) {
606 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp);
608 blsize = pmp->pm_bpcluster;
611 de_cn2off(pmp, rablock) < dep->de_FileSize) {
612 rasize = pmp->pm_bpcluster;
613 error = breadn(vp, lbn, blsize,
614 &rablock, &rasize, 1, NOCRED, &bp);
616 error = bread(vp, lbn, blsize, NOCRED, &bp);
623 on = uio->uio_offset & pmp->pm_crbomask;
624 diff = pmp->pm_bpcluster - on;
625 n = diff > uio->uio_resid ? uio->uio_resid : diff;
626 diff = dep->de_FileSize - uio->uio_offset;
629 diff = blsize - bp->b_resid;
632 error = uiomove(bp->b_data + on, (int) n, uio);
634 } while (error == 0 && uio->uio_resid > 0 && n != 0);
635 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
636 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
637 dep->de_flag |= DE_ACCESS;
642 * Write data to a file or directory.
646 struct vop_write_args /* {
650 struct ucred *a_cred;
661 int ioflag = ap->a_ioflag;
662 struct uio *uio = ap->a_uio;
663 struct proc *p = uio->uio_procp;
664 struct vnode *vp = ap->a_vp;
665 struct vnode *thisvp;
666 struct denode *dep = VTODE(vp);
667 struct msdosfsmount *pmp = dep->de_pmp;
668 struct ucred *cred = ap->a_cred;
671 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
672 vp, uio, ioflag, cred);
673 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
674 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
677 switch (vp->v_type) {
679 if (ioflag & IO_APPEND)
680 uio->uio_offset = dep->de_FileSize;
686 panic("msdosfs_write(): bad file type");
689 if (uio->uio_offset < 0)
692 if (uio->uio_resid == 0)
696 * If they've exceeded their filesize limit, tell them about it.
699 ((uoff_t)uio->uio_offset + uio->uio_resid >
700 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
705 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
709 * If the offset we are starting the write at is beyond the end of
710 * the file, then they've done a seek. Unix filesystems allow
711 * files with holes in them, DOS doesn't so we must fill the hole
712 * with zeroed blocks.
714 if (uio->uio_offset > dep->de_FileSize) {
715 error = deextend(dep, uio->uio_offset, cred);
721 * Remember some values in case the write fails.
723 resid = uio->uio_resid;
724 osize = dep->de_FileSize;
727 * If we write beyond the end of the file, extend it to its ultimate
728 * size ahead of the time to hopefully get a contiguous area.
730 if (uio->uio_offset + resid > osize) {
731 count = de_clcount(pmp, uio->uio_offset + resid) -
732 de_clcount(pmp, osize);
733 error = extendfile(dep, count, NULL, NULL, 0);
734 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
736 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
738 lastcn = de_clcount(pmp, osize) - 1;
741 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
746 croffset = uio->uio_offset & pmp->pm_crbomask;
747 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
748 if (uio->uio_offset + n > dep->de_FileSize) {
749 dep->de_FileSize = uio->uio_offset + n;
750 /* The object size needs to be set before buffer is allocated */
751 vnode_pager_setsize(vp, dep->de_FileSize);
754 bn = de_cluster(pmp, uio->uio_offset);
755 if ((uio->uio_offset & pmp->pm_crbomask) == 0
756 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
757 > de_cluster(pmp, uio->uio_offset)
758 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
760 * If either the whole cluster gets written,
761 * or we write the cluster from its start beyond EOF,
762 * then no need to read data from disk.
764 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0);
767 * Do the bmap now, since pcbmap needs buffers
768 * for the fat table. (see msdosfs_strategy)
770 if (bp->b_blkno == bp->b_lblkno) {
771 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno,
776 if (bp->b_blkno == -1) {
779 error = EIO; /* XXX */
784 * The block we need to write into exists, so read it in.
786 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp);
794 * Should these vnode_pager_* functions be done on dir
799 * Copy the data from user space into the buf header.
801 error = uiomove(bp->b_data + croffset, n, uio);
808 * If they want this synchronous then write it and wait for
809 * it. Otherwise, if on a cluster boundary write it
810 * asynchronously so we can move on to the next block
811 * without delay. Otherwise do a delayed write because we
812 * may want to write somemore into the block later.
814 if (ioflag & IO_SYNC)
816 else if (n + croffset == pmp->pm_bpcluster)
820 dep->de_flag |= DE_UPDATE;
821 } while (error == 0 && uio->uio_resid > 0);
824 * If the write failed and they want us to, truncate the file back
825 * to the size it was before the write was attempted.
829 if (ioflag & IO_UNIT) {
830 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL);
831 uio->uio_offset -= resid - uio->uio_resid;
832 uio->uio_resid = resid;
834 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL);
835 if (uio->uio_resid != resid)
838 } else if (ioflag & IO_SYNC)
839 error = deupdat(dep, 1);
844 * Flush the blocks of a file to disk.
846 * This function is worthless for vnodes that represent directories. Maybe we
847 * could just do a sync if they try an fsync on a directory file.
851 struct vop_fsync_args /* {
853 struct ucred *a_cred;
858 struct vnode *vp = ap->a_vp;
860 struct buf *bp, *nbp;
863 * Flush all dirty buffers associated with a vnode.
867 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
868 nbp = TAILQ_NEXT(bp, b_vnbufs);
869 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
871 if ((bp->b_flags & B_DELWRI) == 0)
872 panic("msdosfs_fsync: not dirty");
878 while (vp->v_numoutput) {
879 vp->v_flag |= VBWAIT;
880 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0);
883 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
884 vprint("msdosfs_fsync: dirty", vp);
889 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
894 struct vop_remove_args /* {
897 struct componentname *a_cnp;
900 struct denode *dep = VTODE(ap->a_vp);
901 struct denode *ddep = VTODE(ap->a_dvp);
904 if (ap->a_vp->v_type == VDIR)
907 error = removede(ddep, dep);
909 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
915 * DOS filesystems don't know what links are. But since we already called
916 * msdosfs_lookup() with create and lockparent, the parent is locked so we
917 * have to free it before we return the error.
921 struct vop_link_args /* {
922 struct vnode *a_tdvp;
924 struct componentname *a_cnp;
931 * Renames on files require moving the denode to a new hash queue since the
932 * denode's location is used to compute which hash queue to put the file
933 * in. Unless it is a rename in place. For example "mv a b".
935 * What follows is the basic algorithm:
938 * if (dest file exists) {
941 * if (dest and src in same directory) {
942 * rewrite name in existing directory slot
944 * write new entry in dest directory
945 * update offset and dirclust in denode
946 * move denode to new hash chain
947 * clear old directory entry
951 * if (dest directory exists) {
952 * if (dest is not empty) {
955 * remove dest directory
957 * if (dest and src in same directory) {
958 * rewrite name in existing entry
960 * be sure dest is not a child of src directory
961 * write entry in dest directory
962 * update "." and ".." in moved directory
963 * clear old directory entry for moved directory
968 * source's parent directory is unlocked
969 * source file or directory is unlocked
970 * destination's parent directory is locked
971 * destination file or directory is locked if it exists
974 * all denodes should be released
977 * I'm not sure how the memory containing the pathnames pointed at by the
978 * componentname structures is freed, there may be some memory bleeding
979 * for each rename done.
983 struct vop_rename_args /* {
984 struct vnode *a_fdvp;
986 struct componentname *a_fcnp;
987 struct vnode *a_tdvp;
989 struct componentname *a_tcnp;
992 struct vnode *tdvp = ap->a_tdvp;
993 struct vnode *fvp = ap->a_fvp;
994 struct vnode *fdvp = ap->a_fdvp;
995 struct vnode *tvp = ap->a_tvp;
996 struct componentname *tcnp = ap->a_tcnp;
997 struct componentname *fcnp = ap->a_fcnp;
998 struct proc *p = fcnp->cn_proc;
999 struct denode *ip, *xp, *dp, *zp;
1000 u_char toname[11], oldname[11];
1001 u_long from_diroffset, to_diroffset;
1003 int doingdirectory = 0, newparent = 0;
1007 struct denode *fddep; /* from file's parent directory */
1008 struct msdosfsmount *pmp;
1009 struct direntry *dotdotp;
1012 fddep = VTODE(ap->a_fdvp);
1013 pmp = fddep->de_pmp;
1015 pmp = VFSTOMSDOSFS(fdvp->v_mount);
1018 if ((tcnp->cn_flags & HASBUF) == 0 ||
1019 (fcnp->cn_flags & HASBUF) == 0)
1020 panic("msdosfs_rename: no name");
1023 * Check for cross-device rename.
1025 if ((fvp->v_mount != tdvp->v_mount) ||
1026 (tvp && (fvp->v_mount != tvp->v_mount))) {
1041 * If source and dest are the same, do nothing.
1048 error = vn_lock(fvp, LK_EXCLUSIVE, p);
1055 * Be sure we are not renaming ".", "..", or an alias of ".". This
1056 * leads to a crippled directory tree. It's pretty tough to do a
1057 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1058 * doesn't work if the ".." entry is missing.
1060 if (ip->de_Attributes & ATTR_DIRECTORY) {
1062 * Avoid ".", "..", and aliases of "." for obvious reasons.
1064 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1066 (fcnp->cn_flags & ISDOTDOT) ||
1067 (tcnp->cn_flags & ISDOTDOT) ||
1068 (ip->de_flag & DE_RENAME)) {
1069 VOP_UNLOCK(fvp, 0, p);
1073 ip->de_flag |= DE_RENAME;
1078 * When the target exists, both the directory
1079 * and target vnodes are returned locked.
1082 xp = tvp ? VTODE(tvp) : NULL;
1084 * Remember direntry place to use for destination
1086 to_diroffset = dp->de_fndoffset;
1087 to_count = dp->de_fndcnt;
1090 * If ".." must be changed (ie the directory gets a new
1091 * parent) then the source directory must not be in the
1092 * directory heirarchy above the target, as this would
1093 * orphan everything below the source directory. Also
1094 * the user must have write permission in the source so
1095 * as to be able to change "..". We must repeat the call
1096 * to namei, as the parent directory is unlocked by the
1097 * call to doscheckpath().
1099 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc);
1100 VOP_UNLOCK(fvp, 0, p);
1101 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1103 if (doingdirectory && newparent) {
1104 if (error) /* write access check above */
1109 * doscheckpath() vput()'s dp,
1110 * so we have to do a relookup afterwards
1112 error = doscheckpath(ip, dp);
1115 if ((tcnp->cn_flags & SAVESTART) == 0)
1116 panic("msdosfs_rename: lost to startdir");
1117 error = relookup(tdvp, &tvp, tcnp);
1121 xp = tvp ? VTODE(tvp) : NULL;
1126 * Target must be empty if a directory and have no links
1127 * to it. Also, ensure source and target are compatible
1128 * (both directories, or both not directories).
1130 if (xp->de_Attributes & ATTR_DIRECTORY) {
1131 if (!dosdirempty(xp)) {
1135 if (!doingdirectory) {
1140 } else if (doingdirectory) {
1144 error = removede(dp, xp);
1152 * Convert the filename in tcnp into a dos filename. We copy this
1153 * into the denode and directory entry for the destination
1156 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1161 * Since from wasn't locked at various places above,
1162 * have to do a relookup here.
1164 fcnp->cn_flags &= ~MODMASK;
1165 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1166 if ((fcnp->cn_flags & SAVESTART) == 0)
1167 panic("msdosfs_rename: lost from startdir");
1169 VOP_UNLOCK(tdvp, 0, p);
1170 if (relookup(fdvp, &fvp, fcnp) == 0)
1174 * From name has disappeared.
1177 panic("rename: lost dir entry");
1180 VOP_UNLOCK(tdvp, 0, p);
1186 from_diroffset = zp->de_fndoffset;
1189 * Ensure that the directory entry still exists and has not
1190 * changed till now. If the source is a file the entry may
1191 * have been unlinked or renamed. In either case there is
1192 * no further work to be done. If the source is a directory
1193 * then it cannot have been rmdir'ed or renamed; this is
1194 * prohibited by the DE_RENAME flag.
1198 panic("rename: lost dir entry");
1200 VOP_UNLOCK(fvp, 0, p);
1202 VOP_UNLOCK(fdvp, 0, p);
1209 * First write a new entry in the destination
1210 * directory and mark the entry in the source directory
1211 * as deleted. Then move the denode to the correct hash
1212 * chain for its new location in the filesystem. And, if
1213 * we moved a directory, then update its .. entry to point
1214 * to the new parent directory.
1216 bcopy(ip->de_Name, oldname, 11);
1217 bcopy(toname, ip->de_Name, 11); /* update denode */
1218 dp->de_fndoffset = to_diroffset;
1219 dp->de_fndcnt = to_count;
1220 error = createde(ip, dp, (struct denode **)0, tcnp);
1222 bcopy(oldname, ip->de_Name, 11);
1224 VOP_UNLOCK(fdvp, 0, p);
1225 VOP_UNLOCK(fvp, 0, p);
1229 zp->de_fndoffset = from_diroffset;
1230 error = removede(zp, ip);
1232 /* XXX should really panic here, fs is corrupt */
1234 VOP_UNLOCK(fdvp, 0, p);
1235 VOP_UNLOCK(fvp, 0, p);
1238 if (!doingdirectory) {
1239 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1240 &ip->de_dirclust, 0);
1242 /* XXX should really panic here, fs is corrupt */
1244 VOP_UNLOCK(fdvp, 0, p);
1245 VOP_UNLOCK(fvp, 0, p);
1248 if (ip->de_dirclust == MSDOSFSROOT)
1249 ip->de_diroffset = to_diroffset;
1251 ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
1255 VOP_UNLOCK(fdvp, 0, p);
1259 * If we moved a directory to a new parent directory, then we must
1260 * fixup the ".." entry in the moved directory.
1262 if (doingdirectory && newparent) {
1263 cn = ip->de_StartCluster;
1264 if (cn == MSDOSFSROOT) {
1265 /* this should never happen */
1266 panic("msdosfs_rename(): updating .. in root directory?");
1268 bn = cntobn(pmp, cn);
1269 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,
1272 /* XXX should really panic here, fs is corrupt */
1274 VOP_UNLOCK(fvp, 0, p);
1277 dotdotp = (struct direntry *)bp->b_data + 1;
1278 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1280 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1283 /* XXX should really panic here, fs is corrupt */
1284 VOP_UNLOCK(fvp, 0, p);
1289 VOP_UNLOCK(fvp, 0, p);
1295 ip->de_flag &= ~DE_RENAME;
1303 struct direntry dot;
1304 struct direntry dotdot;
1305 } dosdirtemplate = {
1306 { ". ", " ", /* the . entry */
1307 ATTR_DIRECTORY, /* file attribute */
1309 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1310 { 0, 0 }, /* access date */
1311 { 0, 0 }, /* high bits of start cluster */
1312 { 210, 4 }, { 210, 4 }, /* modify time & date */
1313 { 0, 0 }, /* startcluster */
1314 { 0, 0, 0, 0 } /* filesize */
1316 { ".. ", " ", /* the .. entry */
1317 ATTR_DIRECTORY, /* file attribute */
1319 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1320 { 0, 0 }, /* access date */
1321 { 0, 0 }, /* high bits of start cluster */
1322 { 210, 4 }, { 210, 4 }, /* modify time & date */
1323 { 0, 0 }, /* startcluster */
1324 { 0, 0, 0, 0 } /* filesize */
1330 struct vop_mkdir_args /* {
1331 struct vnode *a_dvp;
1332 struvt vnode **a_vpp;
1333 struvt componentname *a_cnp;
1334 struct vattr *a_vap;
1337 struct componentname *cnp = ap->a_cnp;
1339 struct denode *pdep = VTODE(ap->a_dvp);
1340 struct direntry *denp;
1341 struct msdosfsmount *pmp = pdep->de_pmp;
1343 u_long newcluster, pcl;
1346 struct denode ndirent;
1350 * If this is the root directory and there is no space left we
1351 * can't do anything. This is because the root directory can not
1354 if (pdep->de_StartCluster == MSDOSFSROOT
1355 && pdep->de_fndoffset >= pdep->de_FileSize) {
1361 * Allocate a cluster to hold the about to be created directory.
1363 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1367 bzero(&ndirent, sizeof(ndirent));
1368 ndirent.de_pmp = pmp;
1369 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1371 DETIMES(&ndirent, &ts, &ts, &ts);
1374 * Now fill the cluster with the "." and ".." entries. And write
1375 * the cluster to disk. This way it is there for the parent
1376 * directory to be pointing at if there were a crash.
1378 bn = cntobn(pmp, newcluster);
1379 /* always succeeds */
1380 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0);
1381 bzero(bp->b_data, pmp->pm_bpcluster);
1382 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1383 denp = (struct direntry *)bp->b_data;
1384 putushort(denp[0].deStartCluster, newcluster);
1385 putushort(denp[0].deCDate, ndirent.de_CDate);
1386 putushort(denp[0].deCTime, ndirent.de_CTime);
1387 denp[0].deCHundredth = ndirent.de_CHun;
1388 putushort(denp[0].deADate, ndirent.de_ADate);
1389 putushort(denp[0].deMDate, ndirent.de_MDate);
1390 putushort(denp[0].deMTime, ndirent.de_MTime);
1391 pcl = pdep->de_StartCluster;
1392 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1394 putushort(denp[1].deStartCluster, pcl);
1395 putushort(denp[1].deCDate, ndirent.de_CDate);
1396 putushort(denp[1].deCTime, ndirent.de_CTime);
1397 denp[1].deCHundredth = ndirent.de_CHun;
1398 putushort(denp[1].deADate, ndirent.de_ADate);
1399 putushort(denp[1].deMDate, ndirent.de_MDate);
1400 putushort(denp[1].deMTime, ndirent.de_MTime);
1402 putushort(denp[0].deHighClust, newcluster >> 16);
1403 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1411 * Now build up a directory entry pointing to the newly allocated
1412 * cluster. This will be written to an empty slot in the parent
1416 if ((cnp->cn_flags & HASBUF) == 0)
1417 panic("msdosfs_mkdir: no name");
1419 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1423 ndirent.de_Attributes = ATTR_DIRECTORY;
1424 ndirent.de_LowerCase = 0;
1425 ndirent.de_StartCluster = newcluster;
1426 ndirent.de_FileSize = 0;
1427 ndirent.de_dev = pdep->de_dev;
1428 ndirent.de_devvp = pdep->de_devvp;
1429 error = createde(&ndirent, pdep, &dep, cnp);
1432 *ap->a_vpp = DETOV(dep);
1436 clusterfree(pmp, newcluster, NULL);
1443 struct vop_rmdir_args /* {
1444 struct vnode *a_dvp;
1446 struct componentname *a_cnp;
1449 register struct vnode *vp = ap->a_vp;
1450 register struct vnode *dvp = ap->a_dvp;
1451 register struct componentname *cnp = ap->a_cnp;
1452 register struct denode *ip, *dp;
1453 struct proc *p = cnp->cn_proc;
1460 * Verify the directory is empty (and valid).
1461 * (Rmdir ".." won't be valid since
1462 * ".." will contain a reference to
1463 * the current directory and thus be
1467 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1472 * Delete the entry from the directory. For dos filesystems this
1473 * gets rid of the directory entry on disk, the in memory copy
1474 * still exists but the de_refcnt is <= 0. This prevents it from
1475 * being found by deget(). When the vput() on dep is done we give
1476 * up access and eventually msdosfs_reclaim() will be called which
1477 * will remove it from the denode cache.
1479 error = removede(dp, ip);
1483 * This is where we decrement the link count in the parent
1484 * directory. Since dos filesystems don't do this we just purge
1488 VOP_UNLOCK(dvp, 0, p);
1490 * Truncate the directory that is being deleted.
1492 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p);
1495 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p);
1501 * DOS filesystems don't know what symlinks are.
1505 struct vop_symlink_args /* {
1506 struct vnode *a_dvp;
1507 struct vnode **a_vpp;
1508 struct componentname *a_cnp;
1509 struct vattr *a_vap;
1513 return (EOPNOTSUPP);
1518 struct vop_readdir_args /* {
1521 struct ucred *a_cred;
1538 struct denode *dep = VTODE(ap->a_vp);
1539 struct msdosfsmount *pmp = dep->de_pmp;
1540 struct direntry *dentp;
1541 struct dirent dirbuf;
1542 struct uio *uio = ap->a_uio;
1543 u_long *cookies = NULL;
1548 #ifdef MSDOSFS_DEBUG
1549 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1550 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1554 * msdosfs_readdir() won't operate properly on regular files since
1555 * it does i/o only with the the filesystem vnode, and hence can
1556 * retrieve the wrong block from the buffer cache for a plain file.
1557 * So, fail attempts to readdir() on a plain file.
1559 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1563 * To be safe, initialize dirbuf
1565 bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
1568 * If the user buffer is smaller than the size of one dos directory
1569 * entry or the file offset is not a multiple of the size of a
1570 * directory entry, then we fail the read.
1572 off = offset = uio->uio_offset;
1573 if (uio->uio_resid < sizeof(struct direntry) ||
1574 (offset & (sizeof(struct direntry) - 1)))
1577 if (ap->a_ncookies) {
1578 ncookies = uio->uio_resid / 16;
1579 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1581 *ap->a_cookies = cookies;
1582 *ap->a_ncookies = ncookies;
1585 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1588 * If they are reading from the root directory then, we simulate
1589 * the . and .. entries since these don't exist in the root
1590 * directory. We also set the offset bias to make up for having to
1591 * simulate these entries. By this I mean that at file offset 64 we
1592 * read the first entry in the root directory that lives on disk.
1594 if (dep->de_StartCluster == MSDOSFSROOT
1595 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1597 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1600 bias = 2 * sizeof(struct direntry);
1601 if (offset < bias) {
1602 for (n = (int)offset / sizeof(struct direntry);
1605 dirbuf.d_fileno = cntobn(pmp,
1609 dirbuf.d_fileno = 1;
1610 dirbuf.d_type = DT_DIR;
1613 dirbuf.d_namlen = 1;
1614 strcpy(dirbuf.d_name, ".");
1617 dirbuf.d_namlen = 2;
1618 strcpy(dirbuf.d_name, "..");
1621 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1622 if (uio->uio_resid < dirbuf.d_reclen)
1624 error = uiomove((caddr_t) &dirbuf,
1625 dirbuf.d_reclen, uio);
1628 offset += sizeof(struct direntry);
1631 *cookies++ = offset;
1632 if (--ncookies <= 0)
1640 while (uio->uio_resid > 0) {
1641 lbn = de_cluster(pmp, offset - bias);
1642 on = (offset - bias) & pmp->pm_crbomask;
1643 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1644 diff = dep->de_FileSize - (offset - bias);
1648 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1651 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp);
1656 n = min(n, blsize - bp->b_resid);
1659 * Convert from dos directory entries to fs-independent
1660 * directory entries.
1662 for (dentp = (struct direntry *)(bp->b_data + on);
1663 (char *)dentp < bp->b_data + on + n;
1664 dentp++, offset += sizeof(struct direntry)) {
1666 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1667 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1670 * If this is an unused entry, we can stop.
1672 if (dentp->deName[0] == SLOT_EMPTY) {
1677 * Skip deleted entries.
1679 if (dentp->deName[0] == SLOT_DELETED) {
1685 * Handle Win95 long directory entries
1687 if (dentp->deAttributes == ATTR_WIN95) {
1688 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1690 chksum = win2unixfn((struct winentry *)dentp,
1692 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1698 * Skip volume labels
1700 if (dentp->deAttributes & ATTR_VOLUME) {
1705 * This computation of d_fileno must match
1706 * the computation of va_fileid in
1709 if (dentp->deAttributes & ATTR_DIRECTORY) {
1710 fileno = getushort(dentp->deStartCluster);
1712 fileno |= getushort(dentp->deHighClust) << 16;
1713 /* if this is the root directory */
1714 if (fileno == MSDOSFSROOT)
1716 fileno = cntobn(pmp,
1722 fileno = cntobn(pmp, fileno) * dirsperblk;
1723 dirbuf.d_fileno = fileno;
1724 dirbuf.d_type = DT_DIR;
1726 dirbuf.d_fileno = offset / sizeof(struct direntry);
1727 dirbuf.d_type = DT_REG;
1729 if (chksum != winChksum(dentp->deName))
1730 dirbuf.d_namlen = dos2unixfn(dentp->deName,
1731 (u_char *)dirbuf.d_name,
1732 dentp->deLowerCase |
1733 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1734 (LCASE_BASE | LCASE_EXT) : 0),
1735 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1737 pmp->pm_flags & MSDOSFSMNT_ULTABLE,
1740 dirbuf.d_name[dirbuf.d_namlen] = 0;
1742 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1743 if (uio->uio_resid < dirbuf.d_reclen) {
1747 error = uiomove((caddr_t) &dirbuf,
1748 dirbuf.d_reclen, uio);
1754 *cookies++ = offset + sizeof(struct direntry);
1755 if (--ncookies <= 0) {
1760 off = offset + sizeof(struct direntry);
1765 /* Subtract unused cookies */
1767 *ap->a_ncookies -= ncookies;
1769 uio->uio_offset = off;
1772 * Set the eofflag (NFS uses it)
1774 if (ap->a_eofflag) {
1775 if (dep->de_FileSize - (offset - bias) <= 0)
1784 * vp - address of vnode file the file
1785 * bn - which cluster we are interested in mapping to a filesystem block number.
1786 * vpp - returns the vnode for the block special file holding the filesystem
1787 * containing the file of interest
1788 * bnp - address of where to return the filesystem relative block number
1792 struct vop_bmap_args /* {
1795 struct vnode **a_vpp;
1801 struct denode *dep = VTODE(ap->a_vp);
1803 if (ap->a_vpp != NULL)
1804 *ap->a_vpp = dep->de_devvp;
1805 if (ap->a_bnp == NULL)
1809 * Sequential clusters should be counted here.
1816 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
1820 msdosfs_strategy(ap)
1821 struct vop_strategy_args /* {
1826 struct buf *bp = ap->a_bp;
1827 struct denode *dep = VTODE(bp->b_vp);
1831 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
1832 panic("msdosfs_strategy: spec");
1834 * If we don't already know the filesystem relative block number
1835 * then get it using pcbmap(). If pcbmap() returns the block
1836 * number as -1 then we've got a hole in the file. DOS filesystems
1837 * don't allow files with holes, so we shouldn't ever see this.
1839 if (bp->b_blkno == bp->b_lblkno) {
1840 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0);
1842 bp->b_error = error;
1843 bp->b_flags |= B_ERROR;
1847 if ((long)bp->b_blkno == -1)
1850 if (bp->b_blkno == -1) {
1855 * Read/write the block from/to the disk that contains the desired
1859 bp->b_dev = vp->v_rdev;
1860 VOP_STRATEGY(vp, bp);
1866 struct vop_print_args /* {
1870 struct denode *dep = VTODE(ap->a_vp);
1873 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1874 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1875 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
1876 lockmgr_printinfo(&dep->de_lock);
1882 msdosfs_pathconf(ap)
1883 struct vop_pathconf_args /* {
1889 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1891 switch (ap->a_name) {
1896 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1899 *ap->a_retval = PATH_MAX;
1901 case _PC_CHOWN_RESTRICTED:
1916 * XXX By default, wimp out... note that a_offset is ignored (and always
1920 msdosfs_getpages(ap)
1921 struct vop_getpages_args *ap;
1923 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1930 * XXX By default, wimp out... note that a_offset is ignored (and always
1934 msdosfs_putpages(ap)
1935 struct vop_putpages_args *ap;
1937 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1938 ap->a_sync, ap->a_rtvals);
1941 /* Global vfs data structures for msdosfs */
1942 vop_t **msdosfs_vnodeop_p;
1943 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
1944 { &vop_default_desc, (vop_t *) vop_defaultop },
1945 { &vop_access_desc, (vop_t *) msdosfs_access },
1946 { &vop_bmap_desc, (vop_t *) msdosfs_bmap },
1947 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup },
1948 { &vop_close_desc, (vop_t *) msdosfs_close },
1949 { &vop_create_desc, (vop_t *) msdosfs_create },
1950 { &vop_fsync_desc, (vop_t *) msdosfs_fsync },
1951 { &vop_getattr_desc, (vop_t *) msdosfs_getattr },
1952 { &vop_inactive_desc, (vop_t *) msdosfs_inactive },
1953 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
1954 { &vop_link_desc, (vop_t *) msdosfs_link },
1955 { &vop_lock_desc, (vop_t *) vop_stdlock },
1956 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
1957 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir },
1958 { &vop_mknod_desc, (vop_t *) msdosfs_mknod },
1959 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf },
1960 { &vop_print_desc, (vop_t *) msdosfs_print },
1961 { &vop_read_desc, (vop_t *) msdosfs_read },
1962 { &vop_readdir_desc, (vop_t *) msdosfs_readdir },
1963 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim },
1964 { &vop_remove_desc, (vop_t *) msdosfs_remove },
1965 { &vop_rename_desc, (vop_t *) msdosfs_rename },
1966 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir },
1967 { &vop_setattr_desc, (vop_t *) msdosfs_setattr },
1968 { &vop_strategy_desc, (vop_t *) msdosfs_strategy },
1969 { &vop_symlink_desc, (vop_t *) msdosfs_symlink },
1970 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
1971 { &vop_write_desc, (vop_t *) msdosfs_write },
1972 { &vop_getpages_desc, (vop_t *) msdosfs_getpages },
1973 { &vop_putpages_desc, (vop_t *) msdosfs_putpages },
1976 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
1977 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
1979 VNODEOP_SET(msdosfs_vnodeop_opv_desc);