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 1.11 2003/08/20 09:56:32 rob 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/resourcevar.h> /* defines plimit structure in proc struct */
55 #include <sys/kernel.h>
59 #include <sys/namei.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>
77 #include "msdosfsmount.h"
80 #define DOS_FILESIZE_MAX 0xffffffff
83 * Prototypes for MSDOSFS vnode operations
85 static int msdosfs_create (struct vop_create_args *);
86 static int msdosfs_mknod (struct vop_mknod_args *);
87 static int msdosfs_close (struct vop_close_args *);
88 static int msdosfs_access (struct vop_access_args *);
89 static int msdosfs_getattr (struct vop_getattr_args *);
90 static int msdosfs_setattr (struct vop_setattr_args *);
91 static int msdosfs_read (struct vop_read_args *);
92 static int msdosfs_write (struct vop_write_args *);
93 static int msdosfs_fsync (struct vop_fsync_args *);
94 static int msdosfs_remove (struct vop_remove_args *);
95 static int msdosfs_link (struct vop_link_args *);
96 static int msdosfs_rename (struct vop_rename_args *);
97 static int msdosfs_mkdir (struct vop_mkdir_args *);
98 static int msdosfs_rmdir (struct vop_rmdir_args *);
99 static int msdosfs_symlink (struct vop_symlink_args *);
100 static int msdosfs_readdir (struct vop_readdir_args *);
101 static int msdosfs_bmap (struct vop_bmap_args *);
102 static int msdosfs_strategy (struct vop_strategy_args *);
103 static int msdosfs_print (struct vop_print_args *);
104 static int msdosfs_pathconf (struct vop_pathconf_args *ap);
105 static int msdosfs_getpages (struct vop_getpages_args *);
106 static int msdosfs_putpages (struct vop_putpages_args *);
109 * Some general notes:
111 * In the ufs filesystem the inodes, superblocks, and indirect blocks are
112 * read/written using the vnode for the filesystem. Blocks that represent
113 * the contents of a file are read/written using the vnode for the file
114 * (including directories when they are read/written as files). This
115 * presents problems for the dos filesystem because data that should be in
116 * an inode (if dos had them) resides in the directory itself. Since we
117 * must update directory entries without the benefit of having the vnode
118 * for the directory we must use the vnode for the filesystem. This means
119 * that when a directory is actually read/written (via read, write, or
120 * readdir, or seek) we must use the vnode for the filesystem instead of
121 * the vnode for the directory as would happen in ufs. This is to insure we
122 * retreive the correct block from the buffer cache since the hash value is
123 * based upon the vnode address and the desired block number.
127 * Create a regular file. On entry the directory to contain the file being
128 * created is locked. We must release before we return. We must also free
129 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
130 * only if the SAVESTART bit in cn_flags is clear on success.
134 struct vop_create_args /* {
136 struct vnode **a_vpp;
137 struct componentname *a_cnp;
141 struct componentname *cnp = ap->a_cnp;
142 struct denode ndirent;
144 struct denode *pdep = VTODE(ap->a_dvp);
149 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
153 * If this is the root directory and there is no space left we
154 * can't do anything. This is because the root directory can not
157 if (pdep->de_StartCluster == MSDOSFSROOT
158 && pdep->de_fndoffset >= pdep->de_FileSize) {
164 * Create a directory entry for the file, then call createde() to
165 * have it installed. NOTE: DOS files are always executable. We
166 * use the absence of the owner write bit to make the file
170 if ((cnp->cn_flags & HASBUF) == 0)
171 panic("msdosfs_create: no name");
173 bzero(&ndirent, sizeof(ndirent));
174 error = uniqdosname(pdep, cnp, ndirent.de_Name);
178 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
179 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
180 ndirent.de_LowerCase = 0;
181 ndirent.de_StartCluster = 0;
182 ndirent.de_FileSize = 0;
183 ndirent.de_dev = pdep->de_dev;
184 ndirent.de_devvp = pdep->de_devvp;
185 ndirent.de_pmp = pdep->de_pmp;
186 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
188 DETIMES(&ndirent, &ts, &ts, &ts);
189 error = createde(&ndirent, pdep, &dep, cnp);
192 *ap->a_vpp = DETOV(dep);
201 struct vop_mknod_args /* {
203 struct vnode **a_vpp;
204 struct componentname *a_cnp;
209 switch (ap->a_vap->va_type) {
211 return (msdosfs_mkdir((struct vop_mkdir_args *)ap));
215 return (msdosfs_create((struct vop_create_args *)ap));
226 struct vop_close_args /* {
229 struct ucred *a_cred;
233 struct vnode *vp = ap->a_vp;
234 struct denode *dep = VTODE(vp);
237 lwkt_gettoken(&vp->v_interlock);
238 if (vp->v_usecount > 1) {
240 lwkt_regettoken(&vp->v_interlock);
241 if (vp->v_usecount > 1) {
242 DETIMES(dep, &ts, &ts, &ts);
245 lwkt_reltoken(&vp->v_interlock);
251 struct vop_access_args /* {
254 struct ucred *a_cred;
258 struct vnode *vp = ap->a_vp;
259 struct denode *dep = VTODE(ap->a_vp);
260 struct msdosfsmount *pmp = dep->de_pmp;
261 struct ucred *cred = ap->a_cred;
262 mode_t mask, file_mode, mode = ap->a_mode;
266 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
267 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
268 file_mode &= pmp->pm_mask;
271 * Disallow write attempts on read-only file systems;
272 * unless the file is a socket, fifo, or a block or
273 * character device resident on the file system.
276 switch (vp->v_type) {
280 if (vp->v_mount->mnt_flag & MNT_RDONLY)
288 /* User id 0 always gets access. */
289 if (cred->cr_uid == 0)
294 /* Otherwise, check the owner. */
295 if (cred->cr_uid == pmp->pm_uid) {
302 return (file_mode & mask) == mask ? 0 : EACCES;
305 /* Otherwise, check the groups. */
306 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
307 if (pmp->pm_gid == *gp) {
314 return (file_mode & mask) == mask ? 0 : EACCES;
317 /* Otherwise, check everyone else. */
324 return (file_mode & mask) == mask ? 0 : EACCES;
329 struct vop_getattr_args /* {
332 struct ucred *a_cred;
336 struct denode *dep = VTODE(ap->a_vp);
337 struct msdosfsmount *pmp = dep->de_pmp;
338 struct vattr *vap = ap->a_vap;
341 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
345 DETIMES(dep, &ts, &ts, &ts);
346 vap->va_fsid = dev2udev(dep->de_dev);
348 * The following computation of the fileid must be the same as that
349 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
352 if (dep->de_Attributes & ATTR_DIRECTORY) {
353 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
354 if (dep->de_StartCluster == MSDOSFSROOT)
357 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
358 if (dep->de_dirclust == MSDOSFSROOT)
359 fileid = roottobn(pmp, 0) * dirsperblk;
360 fileid += dep->de_diroffset / sizeof(struct direntry);
362 vap->va_fileid = fileid;
363 if ((dep->de_Attributes & ATTR_READONLY) == 0)
364 mode = S_IRWXU|S_IRWXG|S_IRWXO;
366 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
367 vap->va_mode = mode & pmp->pm_mask;
368 vap->va_uid = pmp->pm_uid;
369 vap->va_gid = pmp->pm_gid;
372 vap->va_size = dep->de_FileSize;
373 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
374 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
375 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
376 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
378 vap->va_atime = vap->va_mtime;
379 vap->va_ctime = vap->va_mtime;
382 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
383 vap->va_flags |= SF_ARCHIVED;
385 vap->va_blocksize = pmp->pm_bpcluster;
387 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
388 vap->va_type = ap->a_vp->v_type;
389 vap->va_filerev = dep->de_modrev;
395 struct vop_setattr_args /* {
398 struct ucred *a_cred;
402 struct vnode *vp = ap->a_vp;
403 struct denode *dep = VTODE(ap->a_vp);
404 struct msdosfsmount *pmp = dep->de_pmp;
405 struct vattr *vap = ap->a_vap;
406 struct ucred *cred = ap->a_cred;
410 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
411 ap->a_vp, vap, cred, ap->a_td);
415 * Check for unsettable attributes.
417 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
418 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
419 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
420 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
422 printf("msdosfs_setattr(): returning EINVAL\n");
423 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
424 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
425 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
426 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
427 printf(" va_uid %x, va_gid %x\n",
428 vap->va_uid, vap->va_gid);
432 if (vap->va_flags != VNOVAL) {
433 if (vp->v_mount->mnt_flag & MNT_RDONLY)
435 if (cred->cr_uid != pmp->pm_uid &&
436 (error = suser_cred(cred, PRISON_ROOT)))
439 * We are very inconsistent about handling unsupported
440 * attributes. We ignored the access time and the
441 * read and execute bits. We were strict for the other
444 * Here we are strict, stricter than ufs in not allowing
445 * users to attempt to set SF_SETTABLE bits or anyone to
446 * set unsupported bits. However, we ignore attempts to
447 * set ATTR_ARCHIVE for directories `cp -pr' from a more
448 * sensible file system attempts it a lot.
450 if (cred->cr_uid != 0) {
451 if (vap->va_flags & SF_SETTABLE)
454 if (vap->va_flags & ~SF_ARCHIVED)
456 if (vap->va_flags & SF_ARCHIVED)
457 dep->de_Attributes &= ~ATTR_ARCHIVE;
458 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
459 dep->de_Attributes |= ATTR_ARCHIVE;
460 dep->de_flag |= DE_MODIFIED;
463 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
467 if (vp->v_mount->mnt_flag & MNT_RDONLY)
470 if (uid == (uid_t)VNOVAL)
473 if (gid == (gid_t)VNOVAL)
475 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
476 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
477 (error = suser_cred(cred, PRISON_ROOT)))
479 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
483 if (vap->va_size != VNOVAL) {
485 * Disallow write attempts on read-only file systems;
486 * unless the file is a socket, fifo, or a block or
487 * character device resident on the file system.
489 switch (vp->v_type) {
495 if (vp->v_mount->mnt_flag & MNT_RDONLY)
501 error = detrunc(dep, vap->va_size, 0, ap->a_td);
505 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
506 if (vp->v_mount->mnt_flag & MNT_RDONLY)
508 if (cred->cr_uid != pmp->pm_uid &&
509 (error = suser_cred(cred, PRISON_ROOT)) &&
510 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
511 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td))))
513 if (vp->v_type != VDIR) {
514 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
515 vap->va_atime.tv_sec != VNOVAL) {
516 dep->de_flag &= ~DE_ACCESS;
517 unix2dostime(&vap->va_atime, &dep->de_ADate,
520 if (vap->va_mtime.tv_sec != VNOVAL) {
521 dep->de_flag &= ~DE_UPDATE;
522 unix2dostime(&vap->va_mtime, &dep->de_MDate,
523 &dep->de_MTime, NULL);
525 dep->de_Attributes |= ATTR_ARCHIVE;
526 dep->de_flag |= DE_MODIFIED;
530 * DOS files only have the ability to have their writability
531 * attribute set, so we use the owner write bit to set the readonly
534 if (vap->va_mode != (mode_t)VNOVAL) {
535 if (vp->v_mount->mnt_flag & MNT_RDONLY)
537 if (cred->cr_uid != pmp->pm_uid &&
538 (error = suser_cred(cred, PRISON_ROOT)))
540 if (vp->v_type != VDIR) {
541 /* We ignore the read and execute bits. */
542 if (vap->va_mode & VWRITE)
543 dep->de_Attributes &= ~ATTR_READONLY;
545 dep->de_Attributes |= ATTR_READONLY;
546 dep->de_Attributes |= ATTR_ARCHIVE;
547 dep->de_flag |= DE_MODIFIED;
550 return (deupdat(dep, 1));
555 struct vop_read_args /* {
559 struct ucred *a_cred;
574 struct vnode *vp = ap->a_vp;
575 struct denode *dep = VTODE(vp);
576 struct msdosfsmount *pmp = dep->de_pmp;
577 struct uio *uio = ap->a_uio;
579 if (uio->uio_offset < 0)
582 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
585 * If they didn't ask for any data, then we are done.
587 orig_resid = uio->uio_resid;
591 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
593 isadir = dep->de_Attributes & ATTR_DIRECTORY;
595 if (uio->uio_offset >= dep->de_FileSize)
597 lbn = de_cluster(pmp, uio->uio_offset);
599 * If we are operating on a directory file then be sure to
600 * do i/o with the vnode for the filesystem instead of the
601 * vnode for the directory.
604 /* convert cluster # to block # */
605 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
606 if (error == E2BIG) {
611 error = bread(pmp->pm_devvp, lbn, blsize, &bp);
613 blsize = pmp->pm_bpcluster;
616 de_cn2off(pmp, rablock) < dep->de_FileSize) {
617 rasize = pmp->pm_bpcluster;
618 error = breadn(vp, lbn, blsize,
619 &rablock, &rasize, 1, &bp);
621 error = bread(vp, lbn, blsize, &bp);
628 on = uio->uio_offset & pmp->pm_crbomask;
629 diff = pmp->pm_bpcluster - on;
630 n = diff > uio->uio_resid ? uio->uio_resid : diff;
631 diff = dep->de_FileSize - uio->uio_offset;
634 diff = blsize - bp->b_resid;
637 error = uiomove(bp->b_data + on, (int) n, uio);
639 } while (error == 0 && uio->uio_resid > 0 && n != 0);
640 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
641 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
642 dep->de_flag |= DE_ACCESS;
647 * Write data to a file or directory.
651 struct vop_write_args /* {
655 struct ucred *a_cred;
666 int ioflag = ap->a_ioflag;
667 struct uio *uio = ap->a_uio;
668 struct thread *td = uio->uio_td;
669 struct vnode *vp = ap->a_vp;
670 struct vnode *thisvp;
671 struct denode *dep = VTODE(vp);
672 struct msdosfsmount *pmp = dep->de_pmp;
673 struct proc *p = td->td_proc;
676 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
677 vp, uio, ioflag, cred);
678 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
679 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
682 switch (vp->v_type) {
684 if (ioflag & IO_APPEND)
685 uio->uio_offset = dep->de_FileSize;
691 panic("msdosfs_write(): bad file type");
694 if (uio->uio_offset < 0)
697 if (uio->uio_resid == 0)
701 * If they've exceeded their filesize limit, tell them about it.
704 ((uoff_t)uio->uio_offset + uio->uio_resid >
705 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
710 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
714 * If the offset we are starting the write at is beyond the end of
715 * the file, then they've done a seek. Unix filesystems allow
716 * files with holes in them, DOS doesn't so we must fill the hole
717 * with zeroed blocks.
719 if (uio->uio_offset > dep->de_FileSize) {
720 error = deextend(dep, uio->uio_offset);
726 * Remember some values in case the write fails.
728 resid = uio->uio_resid;
729 osize = dep->de_FileSize;
732 * If we write beyond the end of the file, extend it to its ultimate
733 * size ahead of the time to hopefully get a contiguous area.
735 if (uio->uio_offset + resid > osize) {
736 count = de_clcount(pmp, uio->uio_offset + resid) -
737 de_clcount(pmp, osize);
738 error = extendfile(dep, count, NULL, NULL, 0);
739 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
741 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
743 lastcn = de_clcount(pmp, osize) - 1;
746 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
751 croffset = uio->uio_offset & pmp->pm_crbomask;
752 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
753 if (uio->uio_offset + n > dep->de_FileSize) {
754 dep->de_FileSize = uio->uio_offset + n;
755 /* The object size needs to be set before buffer is allocated */
756 vnode_pager_setsize(vp, dep->de_FileSize);
759 bn = de_cluster(pmp, uio->uio_offset);
760 if ((uio->uio_offset & pmp->pm_crbomask) == 0
761 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
762 > de_cluster(pmp, uio->uio_offset)
763 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
765 * If either the whole cluster gets written,
766 * or we write the cluster from its start beyond EOF,
767 * then no need to read data from disk.
769 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0);
772 * Do the bmap now, since pcbmap needs buffers
773 * for the fat table. (see msdosfs_strategy)
775 if (bp->b_blkno == bp->b_lblkno) {
776 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno,
781 if (bp->b_blkno == -1) {
784 error = EIO; /* XXX */
789 * The block we need to write into exists, so read it in.
791 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp);
799 * Should these vnode_pager_* functions be done on dir
804 * Copy the data from user space into the buf header.
806 error = uiomove(bp->b_data + croffset, n, uio);
813 * If they want this synchronous then write it and wait for
814 * it. Otherwise, if on a cluster boundary write it
815 * asynchronously so we can move on to the next block
816 * without delay. Otherwise do a delayed write because we
817 * may want to write somemore into the block later.
819 if (ioflag & IO_SYNC)
821 else if (n + croffset == pmp->pm_bpcluster)
825 dep->de_flag |= DE_UPDATE;
826 } while (error == 0 && uio->uio_resid > 0);
829 * If the write failed and they want us to, truncate the file back
830 * to the size it was before the write was attempted.
834 if (ioflag & IO_UNIT) {
835 detrunc(dep, osize, ioflag & IO_SYNC, NULL);
836 uio->uio_offset -= resid - uio->uio_resid;
837 uio->uio_resid = resid;
839 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL);
840 if (uio->uio_resid != resid)
843 } else if (ioflag & IO_SYNC)
844 error = deupdat(dep, 1);
849 * Flush the blocks of a file to disk.
851 * This function is worthless for vnodes that represent directories. Maybe we
852 * could just do a sync if they try an fsync on a directory file.
856 struct vop_fsync_args /* {
858 struct ucred *a_cred;
863 struct vnode *vp = ap->a_vp;
865 struct buf *bp, *nbp;
868 * Flush all dirty buffers associated with a vnode.
872 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
873 nbp = TAILQ_NEXT(bp, b_vnbufs);
874 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
876 if ((bp->b_flags & B_DELWRI) == 0)
877 panic("msdosfs_fsync: not dirty");
883 while (vp->v_numoutput) {
884 vp->v_flag |= VBWAIT;
885 (void) tsleep((caddr_t)&vp->v_numoutput, 0, "msdosfsn", 0);
888 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
889 vprint("msdosfs_fsync: dirty", vp);
894 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
899 struct vop_remove_args /* {
902 struct componentname *a_cnp;
905 struct denode *dep = VTODE(ap->a_vp);
906 struct denode *ddep = VTODE(ap->a_dvp);
909 if (ap->a_vp->v_type == VDIR)
912 error = removede(ddep, dep);
914 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
920 * DOS filesystems don't know what links are. But since we already called
921 * msdosfs_lookup() with create and lockparent, the parent is locked so we
922 * have to free it before we return the error.
926 struct vop_link_args /* {
927 struct vnode *a_tdvp;
929 struct componentname *a_cnp;
936 * Renames on files require moving the denode to a new hash queue since the
937 * denode's location is used to compute which hash queue to put the file
938 * in. Unless it is a rename in place. For example "mv a b".
940 * What follows is the basic algorithm:
943 * if (dest file exists) {
946 * if (dest and src in same directory) {
947 * rewrite name in existing directory slot
949 * write new entry in dest directory
950 * update offset and dirclust in denode
951 * move denode to new hash chain
952 * clear old directory entry
956 * if (dest directory exists) {
957 * if (dest is not empty) {
960 * remove dest directory
962 * if (dest and src in same directory) {
963 * rewrite name in existing entry
965 * be sure dest is not a child of src directory
966 * write entry in dest directory
967 * update "." and ".." in moved directory
968 * clear old directory entry for moved directory
973 * source's parent directory is unlocked
974 * source file or directory is unlocked
975 * destination's parent directory is locked
976 * destination file or directory is locked if it exists
979 * all denodes should be released
982 * I'm not sure how the memory containing the pathnames pointed at by the
983 * componentname structures is freed, there may be some memory bleeding
984 * for each rename done.
988 struct vop_rename_args /* {
989 struct vnode *a_fdvp;
991 struct componentname *a_fcnp;
992 struct vnode *a_tdvp;
994 struct componentname *a_tcnp;
997 struct vnode *tdvp = ap->a_tdvp;
998 struct vnode *fvp = ap->a_fvp;
999 struct vnode *fdvp = ap->a_fdvp;
1000 struct vnode *tvp = ap->a_tvp;
1001 struct componentname *tcnp = ap->a_tcnp;
1002 struct componentname *fcnp = ap->a_fcnp;
1003 struct thread *td = fcnp->cn_td;
1004 struct denode *ip, *xp, *dp, *zp;
1005 u_char toname[11], oldname[11];
1006 u_long from_diroffset, to_diroffset;
1008 int doingdirectory = 0, newparent = 0;
1012 struct denode *fddep; /* from file's parent directory */
1013 struct msdosfsmount *pmp;
1014 struct direntry *dotdotp;
1017 fddep = VTODE(ap->a_fdvp);
1018 pmp = fddep->de_pmp;
1020 pmp = VFSTOMSDOSFS(fdvp->v_mount);
1023 if ((tcnp->cn_flags & HASBUF) == 0 ||
1024 (fcnp->cn_flags & HASBUF) == 0)
1025 panic("msdosfs_rename: no name");
1028 * Check for cross-device rename.
1030 if ((fvp->v_mount != tdvp->v_mount) ||
1031 (tvp && (fvp->v_mount != tvp->v_mount))) {
1046 * If source and dest are the same, do nothing.
1053 error = vn_lock(fvp, LK_EXCLUSIVE, td);
1060 * Be sure we are not renaming ".", "..", or an alias of ".". This
1061 * leads to a crippled directory tree. It's pretty tough to do a
1062 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1063 * doesn't work if the ".." entry is missing.
1065 if (ip->de_Attributes & ATTR_DIRECTORY) {
1067 * Avoid ".", "..", and aliases of "." for obvious reasons.
1069 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1071 (fcnp->cn_flags & ISDOTDOT) ||
1072 (tcnp->cn_flags & ISDOTDOT) ||
1073 (ip->de_flag & DE_RENAME)) {
1074 VOP_UNLOCK(fvp, 0, td);
1078 ip->de_flag |= DE_RENAME;
1083 * When the target exists, both the directory
1084 * and target vnodes are returned locked.
1087 xp = tvp ? VTODE(tvp) : NULL;
1089 * Remember direntry place to use for destination
1091 to_diroffset = dp->de_fndoffset;
1092 to_count = dp->de_fndcnt;
1095 * If ".." must be changed (ie the directory gets a new
1096 * parent) then the source directory must not be in the
1097 * directory heirarchy above the target, as this would
1098 * orphan everything below the source directory. Also
1099 * the user must have write permission in the source so
1100 * as to be able to change "..". We must repeat the call
1101 * to namei, as the parent directory is unlocked by the
1102 * call to doscheckpath().
1104 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
1105 VOP_UNLOCK(fvp, 0, td);
1106 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1108 if (doingdirectory && newparent) {
1109 if (error) /* write access check above */
1114 * doscheckpath() vput()'s dp,
1115 * so we have to do a relookup afterwards
1117 error = doscheckpath(ip, dp);
1120 if ((tcnp->cn_flags & SAVESTART) == 0)
1121 panic("msdosfs_rename: lost to startdir");
1122 error = relookup(tdvp, &tvp, tcnp);
1126 xp = tvp ? VTODE(tvp) : NULL;
1131 * Target must be empty if a directory and have no links
1132 * to it. Also, ensure source and target are compatible
1133 * (both directories, or both not directories).
1135 if (xp->de_Attributes & ATTR_DIRECTORY) {
1136 if (!dosdirempty(xp)) {
1140 if (!doingdirectory) {
1145 } else if (doingdirectory) {
1149 error = removede(dp, xp);
1157 * Convert the filename in tcnp into a dos filename. We copy this
1158 * into the denode and directory entry for the destination
1161 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1166 * Since from wasn't locked at various places above,
1167 * have to do a relookup here.
1169 fcnp->cn_flags &= ~MODMASK;
1170 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1171 if ((fcnp->cn_flags & SAVESTART) == 0)
1172 panic("msdosfs_rename: lost from startdir");
1174 VOP_UNLOCK(tdvp, 0, td);
1175 if (relookup(fdvp, &fvp, fcnp) == 0)
1179 * From name has disappeared.
1182 panic("rename: lost dir entry");
1185 VOP_UNLOCK(tdvp, 0, td);
1191 from_diroffset = zp->de_fndoffset;
1194 * Ensure that the directory entry still exists and has not
1195 * changed till now. If the source is a file the entry may
1196 * have been unlinked or renamed. In either case there is
1197 * no further work to be done. If the source is a directory
1198 * then it cannot have been rmdir'ed or renamed; this is
1199 * prohibited by the DE_RENAME flag.
1203 panic("rename: lost dir entry");
1205 VOP_UNLOCK(fvp, 0, td);
1207 VOP_UNLOCK(fdvp, 0, td);
1214 * First write a new entry in the destination
1215 * directory and mark the entry in the source directory
1216 * as deleted. Then move the denode to the correct hash
1217 * chain for its new location in the filesystem. And, if
1218 * we moved a directory, then update its .. entry to point
1219 * to the new parent directory.
1221 bcopy(ip->de_Name, oldname, 11);
1222 bcopy(toname, ip->de_Name, 11); /* update denode */
1223 dp->de_fndoffset = to_diroffset;
1224 dp->de_fndcnt = to_count;
1225 error = createde(ip, dp, (struct denode **)0, tcnp);
1227 bcopy(oldname, ip->de_Name, 11);
1229 VOP_UNLOCK(fdvp, 0, td);
1230 VOP_UNLOCK(fvp, 0, td);
1234 zp->de_fndoffset = from_diroffset;
1235 error = removede(zp, ip);
1237 /* XXX should really panic here, fs is corrupt */
1239 VOP_UNLOCK(fdvp, 0, td);
1240 VOP_UNLOCK(fvp, 0, td);
1243 if (!doingdirectory) {
1244 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1245 &ip->de_dirclust, 0);
1247 /* XXX should really panic here, fs is corrupt */
1249 VOP_UNLOCK(fdvp, 0, td);
1250 VOP_UNLOCK(fvp, 0, td);
1253 if (ip->de_dirclust == MSDOSFSROOT)
1254 ip->de_diroffset = to_diroffset;
1256 ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
1260 VOP_UNLOCK(fdvp, 0, td);
1264 * If we moved a directory to a new parent directory, then we must
1265 * fixup the ".." entry in the moved directory.
1267 if (doingdirectory && newparent) {
1268 cn = ip->de_StartCluster;
1269 if (cn == MSDOSFSROOT) {
1270 /* this should never happen */
1271 panic("msdosfs_rename(): updating .. in root directory?");
1273 bn = cntobn(pmp, cn);
1274 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
1276 /* XXX should really panic here, fs is corrupt */
1278 VOP_UNLOCK(fvp, 0, td);
1281 dotdotp = (struct direntry *)bp->b_data + 1;
1282 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1284 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1287 /* XXX should really panic here, fs is corrupt */
1288 VOP_UNLOCK(fvp, 0, td);
1293 VOP_UNLOCK(fvp, 0, td);
1299 ip->de_flag &= ~DE_RENAME;
1307 struct direntry dot;
1308 struct direntry dotdot;
1309 } dosdirtemplate = {
1310 { ". ", " ", /* the . entry */
1311 ATTR_DIRECTORY, /* file attribute */
1313 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1314 { 0, 0 }, /* access date */
1315 { 0, 0 }, /* high bits of start cluster */
1316 { 210, 4 }, { 210, 4 }, /* modify time & date */
1317 { 0, 0 }, /* startcluster */
1318 { 0, 0, 0, 0 } /* filesize */
1320 { ".. ", " ", /* the .. entry */
1321 ATTR_DIRECTORY, /* file attribute */
1323 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1324 { 0, 0 }, /* access date */
1325 { 0, 0 }, /* high bits of start cluster */
1326 { 210, 4 }, { 210, 4 }, /* modify time & date */
1327 { 0, 0 }, /* startcluster */
1328 { 0, 0, 0, 0 } /* filesize */
1334 struct vop_mkdir_args /* {
1335 struct vnode *a_dvp;
1336 struvt vnode **a_vpp;
1337 struvt componentname *a_cnp;
1338 struct vattr *a_vap;
1341 struct componentname *cnp = ap->a_cnp;
1343 struct denode *pdep = VTODE(ap->a_dvp);
1344 struct direntry *denp;
1345 struct msdosfsmount *pmp = pdep->de_pmp;
1347 u_long newcluster, pcl;
1350 struct denode ndirent;
1354 * If this is the root directory and there is no space left we
1355 * can't do anything. This is because the root directory can not
1358 if (pdep->de_StartCluster == MSDOSFSROOT
1359 && pdep->de_fndoffset >= pdep->de_FileSize) {
1365 * Allocate a cluster to hold the about to be created directory.
1367 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1371 bzero(&ndirent, sizeof(ndirent));
1372 ndirent.de_pmp = pmp;
1373 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1375 DETIMES(&ndirent, &ts, &ts, &ts);
1378 * Now fill the cluster with the "." and ".." entries. And write
1379 * the cluster to disk. This way it is there for the parent
1380 * directory to be pointing at if there were a crash.
1382 bn = cntobn(pmp, newcluster);
1383 /* always succeeds */
1384 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0);
1385 bzero(bp->b_data, pmp->pm_bpcluster);
1386 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1387 denp = (struct direntry *)bp->b_data;
1388 putushort(denp[0].deStartCluster, newcluster);
1389 putushort(denp[0].deCDate, ndirent.de_CDate);
1390 putushort(denp[0].deCTime, ndirent.de_CTime);
1391 denp[0].deCHundredth = ndirent.de_CHun;
1392 putushort(denp[0].deADate, ndirent.de_ADate);
1393 putushort(denp[0].deMDate, ndirent.de_MDate);
1394 putushort(denp[0].deMTime, ndirent.de_MTime);
1395 pcl = pdep->de_StartCluster;
1396 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1398 putushort(denp[1].deStartCluster, pcl);
1399 putushort(denp[1].deCDate, ndirent.de_CDate);
1400 putushort(denp[1].deCTime, ndirent.de_CTime);
1401 denp[1].deCHundredth = ndirent.de_CHun;
1402 putushort(denp[1].deADate, ndirent.de_ADate);
1403 putushort(denp[1].deMDate, ndirent.de_MDate);
1404 putushort(denp[1].deMTime, ndirent.de_MTime);
1406 putushort(denp[0].deHighClust, newcluster >> 16);
1407 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1415 * Now build up a directory entry pointing to the newly allocated
1416 * cluster. This will be written to an empty slot in the parent
1420 if ((cnp->cn_flags & HASBUF) == 0)
1421 panic("msdosfs_mkdir: no name");
1423 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1427 ndirent.de_Attributes = ATTR_DIRECTORY;
1428 ndirent.de_LowerCase = 0;
1429 ndirent.de_StartCluster = newcluster;
1430 ndirent.de_FileSize = 0;
1431 ndirent.de_dev = pdep->de_dev;
1432 ndirent.de_devvp = pdep->de_devvp;
1433 error = createde(&ndirent, pdep, &dep, cnp);
1436 *ap->a_vpp = DETOV(dep);
1440 clusterfree(pmp, newcluster, NULL);
1447 struct vop_rmdir_args /* {
1448 struct vnode *a_dvp;
1450 struct componentname *a_cnp;
1453 struct vnode *vp = ap->a_vp;
1454 struct vnode *dvp = ap->a_dvp;
1455 struct componentname *cnp = ap->a_cnp;
1456 struct denode *ip, *dp;
1457 struct thread *td = cnp->cn_td;
1464 * Verify the directory is empty (and valid).
1465 * (Rmdir ".." won't be valid since
1466 * ".." will contain a reference to
1467 * the current directory and thus be
1471 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1476 * Delete the entry from the directory. For dos filesystems this
1477 * gets rid of the directory entry on disk, the in memory copy
1478 * still exists but the de_refcnt is <= 0. This prevents it from
1479 * being found by deget(). When the vput() on dep is done we give
1480 * up access and eventually msdosfs_reclaim() will be called which
1481 * will remove it from the denode cache.
1483 error = removede(dp, ip);
1487 * This is where we decrement the link count in the parent
1488 * directory. Since dos filesystems don't do this we just purge
1492 VOP_UNLOCK(dvp, 0, td);
1494 * Truncate the directory that is being deleted.
1496 error = detrunc(ip, (u_long)0, IO_SYNC, td);
1499 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
1505 * DOS filesystems don't know what symlinks are.
1509 struct vop_symlink_args /* {
1510 struct vnode *a_dvp;
1511 struct vnode **a_vpp;
1512 struct componentname *a_cnp;
1513 struct vattr *a_vap;
1517 return (EOPNOTSUPP);
1522 struct vop_readdir_args /* {
1525 struct ucred *a_cred;
1542 struct denode *dep = VTODE(ap->a_vp);
1543 struct msdosfsmount *pmp = dep->de_pmp;
1544 struct direntry *dentp;
1545 struct dirent dirbuf;
1546 struct uio *uio = ap->a_uio;
1547 u_long *cookies = NULL;
1552 #ifdef MSDOSFS_DEBUG
1553 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1554 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1558 * msdosfs_readdir() won't operate properly on regular files since
1559 * it does i/o only with the the filesystem vnode, and hence can
1560 * retrieve the wrong block from the buffer cache for a plain file.
1561 * So, fail attempts to readdir() on a plain file.
1563 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1567 * To be safe, initialize dirbuf
1569 bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
1572 * If the user buffer is smaller than the size of one dos directory
1573 * entry or the file offset is not a multiple of the size of a
1574 * directory entry, then we fail the read.
1576 off = offset = uio->uio_offset;
1577 if (uio->uio_resid < sizeof(struct direntry) ||
1578 (offset & (sizeof(struct direntry) - 1)))
1581 if (ap->a_ncookies) {
1582 ncookies = uio->uio_resid / 16;
1583 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1585 *ap->a_cookies = cookies;
1586 *ap->a_ncookies = ncookies;
1589 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1592 * If they are reading from the root directory then, we simulate
1593 * the . and .. entries since these don't exist in the root
1594 * directory. We also set the offset bias to make up for having to
1595 * simulate these entries. By this I mean that at file offset 64 we
1596 * read the first entry in the root directory that lives on disk.
1598 if (dep->de_StartCluster == MSDOSFSROOT
1599 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1601 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1604 bias = 2 * sizeof(struct direntry);
1605 if (offset < bias) {
1606 for (n = (int)offset / sizeof(struct direntry);
1609 dirbuf.d_fileno = cntobn(pmp,
1613 dirbuf.d_fileno = 1;
1614 dirbuf.d_type = DT_DIR;
1617 dirbuf.d_namlen = 1;
1618 strcpy(dirbuf.d_name, ".");
1621 dirbuf.d_namlen = 2;
1622 strcpy(dirbuf.d_name, "..");
1625 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1626 if (uio->uio_resid < dirbuf.d_reclen)
1628 error = uiomove((caddr_t) &dirbuf,
1629 dirbuf.d_reclen, uio);
1632 offset += sizeof(struct direntry);
1635 *cookies++ = offset;
1636 if (--ncookies <= 0)
1644 while (uio->uio_resid > 0) {
1645 lbn = de_cluster(pmp, offset - bias);
1646 on = (offset - bias) & pmp->pm_crbomask;
1647 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1648 diff = dep->de_FileSize - (offset - bias);
1652 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1655 error = bread(pmp->pm_devvp, bn, blsize, &bp);
1660 n = min(n, blsize - bp->b_resid);
1663 * Convert from dos directory entries to fs-independent
1664 * directory entries.
1666 for (dentp = (struct direntry *)(bp->b_data + on);
1667 (char *)dentp < bp->b_data + on + n;
1668 dentp++, offset += sizeof(struct direntry)) {
1670 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1671 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1674 * If this is an unused entry, we can stop.
1676 if (dentp->deName[0] == SLOT_EMPTY) {
1681 * Skip deleted entries.
1683 if (dentp->deName[0] == SLOT_DELETED) {
1689 * Handle Win95 long directory entries
1691 if (dentp->deAttributes == ATTR_WIN95) {
1692 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1694 chksum = win2unixfn((struct winentry *)dentp,
1696 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1702 * Skip volume labels
1704 if (dentp->deAttributes & ATTR_VOLUME) {
1709 * This computation of d_fileno must match
1710 * the computation of va_fileid in
1713 if (dentp->deAttributes & ATTR_DIRECTORY) {
1714 fileno = getushort(dentp->deStartCluster);
1716 fileno |= getushort(dentp->deHighClust) << 16;
1717 /* if this is the root directory */
1718 if (fileno == MSDOSFSROOT)
1720 fileno = cntobn(pmp,
1726 fileno = cntobn(pmp, fileno) * dirsperblk;
1727 dirbuf.d_fileno = fileno;
1728 dirbuf.d_type = DT_DIR;
1730 dirbuf.d_fileno = offset / sizeof(struct direntry);
1731 dirbuf.d_type = DT_REG;
1733 if (chksum != winChksum(dentp->deName))
1734 dirbuf.d_namlen = dos2unixfn(dentp->deName,
1735 (u_char *)dirbuf.d_name,
1736 dentp->deLowerCase |
1737 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1738 (LCASE_BASE | LCASE_EXT) : 0),
1739 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1741 pmp->pm_flags & MSDOSFSMNT_ULTABLE,
1744 dirbuf.d_name[dirbuf.d_namlen] = 0;
1746 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1747 if (uio->uio_resid < dirbuf.d_reclen) {
1751 error = uiomove((caddr_t) &dirbuf,
1752 dirbuf.d_reclen, uio);
1758 *cookies++ = offset + sizeof(struct direntry);
1759 if (--ncookies <= 0) {
1764 off = offset + sizeof(struct direntry);
1769 /* Subtract unused cookies */
1771 *ap->a_ncookies -= ncookies;
1773 uio->uio_offset = off;
1776 * Set the eofflag (NFS uses it)
1778 if (ap->a_eofflag) {
1779 if (dep->de_FileSize - (offset - bias) <= 0)
1788 * vp - address of vnode file the file
1789 * bn - which cluster we are interested in mapping to a filesystem block number.
1790 * vpp - returns the vnode for the block special file holding the filesystem
1791 * containing the file of interest
1792 * bnp - address of where to return the filesystem relative block number
1796 struct vop_bmap_args /* {
1799 struct vnode **a_vpp;
1805 struct denode *dep = VTODE(ap->a_vp);
1807 if (ap->a_vpp != NULL)
1808 *ap->a_vpp = dep->de_devvp;
1809 if (ap->a_bnp == NULL)
1813 * Sequential clusters should be counted here.
1820 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
1824 msdosfs_strategy(ap)
1825 struct vop_strategy_args /* {
1830 struct buf *bp = ap->a_bp;
1831 struct denode *dep = VTODE(bp->b_vp);
1835 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
1836 panic("msdosfs_strategy: spec");
1838 * If we don't already know the filesystem relative block number
1839 * then get it using pcbmap(). If pcbmap() returns the block
1840 * number as -1 then we've got a hole in the file. DOS filesystems
1841 * don't allow files with holes, so we shouldn't ever see this.
1843 if (bp->b_blkno == bp->b_lblkno) {
1844 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0);
1846 bp->b_error = error;
1847 bp->b_flags |= B_ERROR;
1851 if ((long)bp->b_blkno == -1)
1854 if (bp->b_blkno == -1) {
1859 * Read/write the block from/to the disk that contains the desired
1863 bp->b_dev = vp->v_rdev;
1864 VOP_STRATEGY(vp, bp);
1870 struct vop_print_args /* {
1874 struct denode *dep = VTODE(ap->a_vp);
1877 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1878 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1879 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
1880 lockmgr_printinfo(&dep->de_lock);
1886 msdosfs_pathconf(ap)
1887 struct vop_pathconf_args /* {
1893 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1895 switch (ap->a_name) {
1900 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1903 *ap->a_retval = PATH_MAX;
1905 case _PC_CHOWN_RESTRICTED:
1920 * XXX By default, wimp out... note that a_offset is ignored (and always
1924 msdosfs_getpages(ap)
1925 struct vop_getpages_args *ap;
1927 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1934 * XXX By default, wimp out... note that a_offset is ignored (and always
1938 msdosfs_putpages(ap)
1939 struct vop_putpages_args *ap;
1941 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1942 ap->a_sync, ap->a_rtvals);
1945 /* Global vfs data structures for msdosfs */
1946 vop_t **msdosfs_vnodeop_p;
1947 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
1948 { &vop_default_desc, (vop_t *) vop_defaultop },
1949 { &vop_access_desc, (vop_t *) msdosfs_access },
1950 { &vop_bmap_desc, (vop_t *) msdosfs_bmap },
1951 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup },
1952 { &vop_close_desc, (vop_t *) msdosfs_close },
1953 { &vop_create_desc, (vop_t *) msdosfs_create },
1954 { &vop_fsync_desc, (vop_t *) msdosfs_fsync },
1955 { &vop_getattr_desc, (vop_t *) msdosfs_getattr },
1956 { &vop_inactive_desc, (vop_t *) msdosfs_inactive },
1957 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
1958 { &vop_link_desc, (vop_t *) msdosfs_link },
1959 { &vop_lock_desc, (vop_t *) vop_stdlock },
1960 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
1961 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir },
1962 { &vop_mknod_desc, (vop_t *) msdosfs_mknod },
1963 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf },
1964 { &vop_print_desc, (vop_t *) msdosfs_print },
1965 { &vop_read_desc, (vop_t *) msdosfs_read },
1966 { &vop_readdir_desc, (vop_t *) msdosfs_readdir },
1967 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim },
1968 { &vop_remove_desc, (vop_t *) msdosfs_remove },
1969 { &vop_rename_desc, (vop_t *) msdosfs_rename },
1970 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir },
1971 { &vop_setattr_desc, (vop_t *) msdosfs_setattr },
1972 { &vop_strategy_desc, (vop_t *) msdosfs_strategy },
1973 { &vop_symlink_desc, (vop_t *) msdosfs_symlink },
1974 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
1975 { &vop_write_desc, (vop_t *) msdosfs_write },
1976 { &vop_getpages_desc, (vop_t *) msdosfs_getpages },
1977 { &vop_putpages_desc, (vop_t *) msdosfs_putpages },
1980 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
1981 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
1983 VNODEOP_SET(msdosfs_vnodeop_opv_desc);