Since ip_input() truncates the packet to ip->ip_len prior to entering the
[dragonfly.git] / sys / vfs / msdosfs / msdosfs_denode.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/msdosfs/msdosfs_denode.c,v 1.47.2.3 2002/08/22 16:20:15 trhodes Exp $ */
0961aa92 2/* $DragonFly: src/sys/vfs/msdosfs/msdosfs_denode.c,v 1.14 2004/08/17 18:57:34 dillon Exp $ */
984263bc
MD
3/* $NetBSD: msdosfs_denode.c,v 1.28 1998/02/10 14:10:00 mrg Exp $ */
4
5/*-
6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
8 * All rights reserved.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
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.
24 *
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.
35 */
36/*
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
38 *
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
41 *
42 * This software is provided "as is".
43 *
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.
48 *
49 * October 1992
50 */
51
52#include <sys/param.h>
53#include <sys/systm.h>
54#include <sys/kernel.h>
55#include <sys/mount.h>
56#include <sys/malloc.h>
57#include <sys/proc.h>
58#include <sys/buf.h>
59#include <sys/vnode.h>
60
61#include <vm/vm.h>
62#include <vm/vm_extern.h>
63
1f2de5d4
MD
64#include "bpb.h"
65#include "msdosfsmount.h"
66#include "direntry.h"
67#include "denode.h"
68#include "fat.h"
984263bc
MD
69
70static MALLOC_DEFINE(M_MSDOSFSNODE, "MSDOSFS node", "MSDOSFS vnode private part");
71
72static struct denode **dehashtbl;
73static u_long dehash; /* size of hash table - 1 */
74#define DEHASH(dev, dcl, doff) (dehashtbl[(minor(dev) + (dcl) + (doff) / \
75 sizeof(struct direntry)) & dehash])
8a8d5d85 76static struct lwkt_token dehash_token;
984263bc
MD
77
78union _qcvt {
79 quad_t qcvt;
80 long val[2];
81};
82#define SETHIGH(q, h) { \
83 union _qcvt tmp; \
84 tmp.qcvt = (q); \
85 tmp.val[_QUAD_HIGHWORD] = (h); \
86 (q) = tmp.qcvt; \
87}
88#define SETLOW(q, l) { \
89 union _qcvt tmp; \
90 tmp.qcvt = (q); \
91 tmp.val[_QUAD_LOWWORD] = (l); \
92 (q) = tmp.qcvt; \
93}
94
95static struct denode *
a6ee311a
RG
96 msdosfs_hashget (dev_t dev, u_long dirclust,
97 u_long diroff);
98static void msdosfs_hashins (struct denode *dep);
99static void msdosfs_hashrem (struct denode *dep);
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MD
100
101/*ARGSUSED*/
102int
4625f023 103msdosfs_init(struct vfsconf *vfsp)
984263bc
MD
104{
105 dehashtbl = hashinit(desiredvnodes/2, M_MSDOSFSMNT, &dehash);
41a01a4d 106 lwkt_token_init(&dehash_token);
984263bc
MD
107 return (0);
108}
109
110int
4625f023 111msdosfs_uninit(struct vfsconf *vfsp)
984263bc
MD
112{
113
114 if (dehashtbl)
115 free(dehashtbl, M_MSDOSFSMNT);
116 return (0);
117}
118
119static struct denode *
4625f023 120msdosfs_hashget(dev_t dev, u_long dirclust, u_long diroff)
984263bc 121{
dadab5e9 122 struct thread *td = curthread; /* XXX */
984263bc 123 struct denode *dep;
41a01a4d
MD
124 lwkt_tokref ilock;
125 lwkt_tokref vlock;
984263bc
MD
126 struct vnode *vp;
127
41a01a4d 128 lwkt_gettoken(&ilock, &dehash_token);
984263bc 129loop:
984263bc 130 for (dep = DEHASH(dev, dirclust, diroff); dep; dep = dep->de_next) {
41a01a4d
MD
131 if (dirclust != dep->de_dirclust
132 || diroff != dep->de_diroffset
133 || dev != dep->de_dev
134 || dep->de_refcnt == 0) {
135 continue;
136 }
137 vp = DETOV(dep);
138 lwkt_gettoken(&vlock, vp->v_interlock);
139 /*
140 * We must check to see if the inode has been ripped
141 * out from under us after blocking.
142 */
143 for (dep = DEHASH(dev, dirclust, diroff); dep; dep = dep->de_next) {
144 if (dirclust == dep->de_dirclust
145 && diroff == dep->de_diroffset
146 && dev == dep->de_dev
147 && dep->de_refcnt != 0) {
148 break;
4954c633 149 }
984263bc 150 }
41a01a4d
MD
151 if (dep == NULL || DETOV(dep) != vp) {
152 lwkt_reltoken(&vlock);
153 goto loop;
154 }
155 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
156 goto loop;
157 lwkt_reltoken(&ilock);
158 return (dep);
984263bc 159 }
41a01a4d 160 lwkt_reltoken(&ilock);
984263bc
MD
161 return (NULL);
162}
163
164static void
4625f023 165msdosfs_hashins(struct denode *dep)
984263bc
MD
166{
167 struct denode **depp, *deq;
41a01a4d 168 lwkt_tokref ilock;
984263bc 169
41a01a4d 170 lwkt_gettoken(&ilock, &dehash_token);
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MD
171 depp = &DEHASH(dep->de_dev, dep->de_dirclust, dep->de_diroffset);
172 deq = *depp;
173 if (deq)
174 deq->de_prev = &dep->de_next;
175 dep->de_next = deq;
176 dep->de_prev = depp;
177 *depp = dep;
41a01a4d 178 lwkt_reltoken(&ilock);
984263bc
MD
179}
180
181static void
4625f023 182msdosfs_hashrem(struct denode *dep)
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MD
183{
184 struct denode *deq;
41a01a4d 185 lwkt_tokref ilock;
984263bc 186
41a01a4d 187 lwkt_gettoken(&ilock, &dehash_token);
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MD
188 deq = dep->de_next;
189 if (deq)
190 deq->de_prev = dep->de_prev;
191 *dep->de_prev = deq;
192#ifdef DIAGNOSTIC
193 dep->de_next = NULL;
194 dep->de_prev = NULL;
195#endif
41a01a4d 196 lwkt_reltoken(&ilock);
984263bc
MD
197}
198
199/*
200 * If deget() succeeds it returns with the gotten denode locked().
201 *
202 * pmp - address of msdosfsmount structure of the filesystem containing
203 * the denode of interest. The pm_dev field and the address of
204 * the msdosfsmount structure are used.
205 * dirclust - which cluster bp contains, if dirclust is 0 (root directory)
206 * diroffset is relative to the beginning of the root directory,
207 * otherwise it is cluster relative.
208 * diroffset - offset past begin of cluster of denode we want
209 * depp - returns the address of the gotten denode.
210 */
211int
4625f023
CP
212deget(struct msdosfsmount *pmp, /* so we know the maj/min number */
213 u_long dirclust, /* cluster this dir entry came from */
214 u_long diroffset, /* index of entry within the cluster */
215 struct denode **depp) /* returns the addr of the gotten denode */
984263bc 216{
dadab5e9 217 struct thread *td = curthread; /* XXX */
984263bc
MD
218 int error;
219 dev_t dev = pmp->pm_dev;
220 struct mount *mntp = pmp->pm_mountp;
221 struct direntry *direntptr;
222 struct denode *ldep;
223 struct vnode *nvp;
224 struct buf *bp;
984263bc
MD
225 struct timeval tv;
226
227#ifdef MSDOSFS_DEBUG
228 printf("deget(pmp %p, dirclust %lu, diroffset %lx, depp %p)\n",
229 pmp, dirclust, diroffset, depp);
230#endif
231
232 /*
233 * On FAT32 filesystems, root is a (more or less) normal
234 * directory
235 */
236 if (FAT32(pmp) && dirclust == MSDOSFSROOT)
237 dirclust = pmp->pm_rootdirblk;
238
239 /*
240 * See if the denode is in the denode cache. Use the location of
241 * the directory entry to compute the hash value. For subdir use
242 * address of "." entry. For root dir (if not FAT32) use cluster
243 * MSDOSFSROOT, offset MSDOSFSROOT_OFS
244 *
245 * NOTE: The check for de_refcnt > 0 below insures the denode being
246 * examined does not represent an unlinked but still open file.
247 * These files are not to be accessible even when the directory
248 * entry that represented the file happens to be reused while the
249 * deleted file is still open.
250 */
251 ldep = msdosfs_hashget(dev, dirclust, diroffset);
252 if (ldep) {
253 *depp = ldep;
254 return (0);
255 }
256
257 /*
258 * Do the MALLOC before the getnewvnode since doing so afterward
259 * might cause a bogus v_data pointer to get dereferenced
260 * elsewhere if MALLOC should block.
261 */
262 MALLOC(ldep, struct denode *, sizeof(struct denode), M_MSDOSFSNODE, M_WAITOK);
263
264 /*
265 * Directory entry was not in cache, have to create a vnode and
266 * copy it from the passed disk buffer.
267 */
597aea93 268 /* getnewvnode() does a vref() on the vnode */
0961aa92 269 error = getnewvnode(VT_MSDOSFS, mntp, mntp->mnt_vn_ops, &nvp);
984263bc
MD
270 if (error) {
271 *depp = NULL;
272 FREE(ldep, M_MSDOSFSNODE);
273 return error;
274 }
275 bzero((caddr_t)ldep, sizeof *ldep);
377d4740 276 lockinit(&ldep->de_lock, 0, "denode", VLKTIMEOUT, 0);
984263bc
MD
277 nvp->v_data = ldep;
278 ldep->de_vnode = nvp;
279 ldep->de_flag = 0;
280 ldep->de_devvp = 0;
281 ldep->de_dev = dev;
282 ldep->de_dirclust = dirclust;
283 ldep->de_diroffset = diroffset;
284 fc_purge(ldep, 0); /* init the fat cache for this denode */
285
286 /*
287 * Lock the denode so that it can't be accessed until we've read
288 * it in and have done what we need to it. Do this here instead
289 * of at the start of msdosfs_hashins() so that reinsert() can
290 * call msdosfs_hashins() with a locked denode.
291 */
8a8d5d85 292 if (lockmgr(&ldep->de_lock, LK_EXCLUSIVE, NULL, td))
984263bc
MD
293 panic("deget: unexpected lock failure");
294
295 /*
296 * Insert the denode into the hash queue.
297 */
298 msdosfs_hashins(ldep);
299
300 ldep->de_pmp = pmp;
301 ldep->de_refcnt = 1;
302 /*
303 * Copy the directory entry into the denode area of the vnode.
304 */
305 if ((dirclust == MSDOSFSROOT
306 || (FAT32(pmp) && dirclust == pmp->pm_rootdirblk))
307 && diroffset == MSDOSFSROOT_OFS) {
308 /*
309 * Directory entry for the root directory. There isn't one,
310 * so we manufacture one. We should probably rummage
311 * through the root directory and find a label entry (if it
312 * exists), and then use the time and date from that entry
313 * as the time and date for the root denode.
314 */
315 nvp->v_flag |= VROOT; /* should be further down XXX */
316
317 ldep->de_Attributes = ATTR_DIRECTORY;
318 ldep->de_LowerCase = 0;
319 if (FAT32(pmp))
320 ldep->de_StartCluster = pmp->pm_rootdirblk;
321 /* de_FileSize will be filled in further down */
322 else {
323 ldep->de_StartCluster = MSDOSFSROOT;
324 ldep->de_FileSize = pmp->pm_rootdirsize * DEV_BSIZE;
325 }
326 /*
327 * fill in time and date so that dos2unixtime() doesn't
328 * spit up when called from msdosfs_getattr() with root
329 * denode
330 */
331 ldep->de_CHun = 0;
332 ldep->de_CTime = 0x0000; /* 00:00:00 */
333 ldep->de_CDate = (0 << DD_YEAR_SHIFT) | (1 << DD_MONTH_SHIFT)
334 | (1 << DD_DAY_SHIFT);
335 /* Jan 1, 1980 */
336 ldep->de_ADate = ldep->de_CDate;
337 ldep->de_MTime = ldep->de_CTime;
338 ldep->de_MDate = ldep->de_CDate;
339 /* leave the other fields as garbage */
340 } else {
341 error = readep(pmp, dirclust, diroffset, &bp, &direntptr);
342 if (error) {
343 /*
344 * The denode does not contain anything useful, so
345 * it would be wrong to leave it on its hash chain.
346 * Arrange for vput() to just forget about it.
347 */
348 ldep->de_Name[0] = SLOT_DELETED;
349
350 vput(nvp);
351 *depp = NULL;
352 return (error);
353 }
354 DE_INTERNALIZE(ldep, direntptr);
355 brelse(bp);
356 }
357
358 /*
359 * Fill in a few fields of the vnode and finish filling in the
360 * denode. Then return the address of the found denode.
361 */
362 if (ldep->de_Attributes & ATTR_DIRECTORY) {
363 /*
364 * Since DOS directory entries that describe directories
365 * have 0 in the filesize field, we take this opportunity
366 * to find out the length of the directory and plug it into
367 * the denode structure.
368 */
369 u_long size;
370
371 /*
372 * XXX Sometimes, these arrives that . entry have cluster
373 * number 0, when it shouldn't. Use real cluster number
374 * instead of what is written in directory entry.
375 */
376 if ((diroffset == 0) && (ldep->de_StartCluster != dirclust)) {
377 printf("deget(): . entry at clust %ld != %ld\n",
378 dirclust, ldep->de_StartCluster);
379 ldep->de_StartCluster = dirclust;
380 }
381
382 nvp->v_type = VDIR;
383 if (ldep->de_StartCluster != MSDOSFSROOT) {
384 error = pcbmap(ldep, 0xffff, 0, &size, 0);
385 if (error == E2BIG) {
386 ldep->de_FileSize = de_cn2off(pmp, size);
387 error = 0;
388 } else
389 printf("deget(): pcbmap returned %d\n", error);
390 }
391 } else
392 nvp->v_type = VREG;
393 getmicrouptime(&tv);
394 SETHIGH(ldep->de_modrev, tv.tv_sec);
395 SETLOW(ldep->de_modrev, tv.tv_usec * 4294);
396 ldep->de_devvp = pmp->pm_devvp;
597aea93 397 vref(ldep->de_devvp);
984263bc
MD
398 *depp = ldep;
399 return (0);
400}
401
402int
4625f023 403deupdat(struct denode *dep, int waitfor)
984263bc
MD
404{
405 int error;
406 struct buf *bp;
407 struct direntry *dirp;
408 struct timespec ts;
409
410 if (DETOV(dep)->v_mount->mnt_flag & MNT_RDONLY)
411 return (0);
412 getnanotime(&ts);
413 DETIMES(dep, &ts, &ts, &ts);
414 if ((dep->de_flag & DE_MODIFIED) == 0)
415 return (0);
416 dep->de_flag &= ~DE_MODIFIED;
417 if (dep->de_Attributes & ATTR_DIRECTORY)
418 return (0);
419 if (dep->de_refcnt <= 0)
420 return (0);
421 error = readde(dep, &bp, &dirp);
422 if (error)
423 return (error);
424 DE_EXTERNALIZE(dirp, dep);
425 if (waitfor)
426 return (bwrite(bp));
427 else {
428 bdwrite(bp);
429 return (0);
430 }
431}
432
433/*
434 * Truncate the file described by dep to the length specified by length.
435 */
436int
4625f023 437detrunc(struct denode *dep, u_long length, int flags, struct thread *td)
984263bc
MD
438{
439 int error;
440 int allerror;
441 u_long eofentry;
442 u_long chaintofree;
443 daddr_t bn;
444 int boff;
445 int isadir = dep->de_Attributes & ATTR_DIRECTORY;
446 struct buf *bp;
447 struct msdosfsmount *pmp = dep->de_pmp;
448
449#ifdef MSDOSFS_DEBUG
450 printf("detrunc(): file %s, length %lu, flags %x\n", dep->de_Name, length, flags);
451#endif
452
453 /*
454 * Disallow attempts to truncate the root directory since it is of
455 * fixed size. That's just the way dos filesystems are. We use
456 * the VROOT bit in the vnode because checking for the directory
457 * bit and a startcluster of 0 in the denode is not adequate to
458 * recognize the root directory at this point in a file or
459 * directory's life.
460 */
461 if ((DETOV(dep)->v_flag & VROOT) && !FAT32(pmp)) {
462 printf("detrunc(): can't truncate root directory, clust %ld, offset %ld\n",
463 dep->de_dirclust, dep->de_diroffset);
464 return (EINVAL);
465 }
466
467
468 if (dep->de_FileSize < length) {
469 vnode_pager_setsize(DETOV(dep), length);
3b568787 470 return deextend(dep, length);
984263bc
MD
471 }
472
473 /*
474 * If the desired length is 0 then remember the starting cluster of
475 * the file and set the StartCluster field in the directory entry
476 * to 0. If the desired length is not zero, then get the number of
477 * the last cluster in the shortened file. Then get the number of
478 * the first cluster in the part of the file that is to be freed.
479 * Then set the next cluster pointer in the last cluster of the
480 * file to CLUST_EOFE.
481 */
482 if (length == 0) {
483 chaintofree = dep->de_StartCluster;
484 dep->de_StartCluster = 0;
485 eofentry = ~0;
486 } else {
487 error = pcbmap(dep, de_clcount(pmp, length) - 1, 0,
488 &eofentry, 0);
489 if (error) {
490#ifdef MSDOSFS_DEBUG
491 printf("detrunc(): pcbmap fails %d\n", error);
492#endif
493 return (error);
494 }
495 }
496
497 fc_purge(dep, de_clcount(pmp, length));
498
499 /*
500 * If the new length is not a multiple of the cluster size then we
501 * must zero the tail end of the new last cluster in case it
502 * becomes part of the file again because of a seek.
503 */
504 if ((boff = length & pmp->pm_crbomask) != 0) {
505 if (isadir) {
506 bn = cntobn(pmp, eofentry);
3b568787 507 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
508 } else {
509 bn = de_blk(pmp, length);
3b568787 510 error = bread(DETOV(dep), bn, pmp->pm_bpcluster, &bp);
984263bc
MD
511 }
512 if (error) {
513 brelse(bp);
514#ifdef MSDOSFS_DEBUG
515 printf("detrunc(): bread fails %d\n", error);
516#endif
517 return (error);
518 }
519 /*
520 * is this the right place for it?
521 */
522 bzero(bp->b_data + boff, pmp->pm_bpcluster - boff);
523 if (flags & IO_SYNC)
524 bwrite(bp);
525 else
526 bdwrite(bp);
527 }
528
529 /*
530 * Write out the updated directory entry. Even if the update fails
531 * we free the trailing clusters.
532 */
533 dep->de_FileSize = length;
534 if (!isadir)
535 dep->de_flag |= DE_UPDATE|DE_MODIFIED;
3b568787 536 allerror = vtruncbuf(DETOV(dep), td, length, pmp->pm_bpcluster);
984263bc
MD
537#ifdef MSDOSFS_DEBUG
538 if (allerror)
539 printf("detrunc(): vtruncbuf error %d\n", allerror);
540#endif
541 error = deupdat(dep, 1);
542 if (error && (allerror == 0))
543 allerror = error;
544#ifdef MSDOSFS_DEBUG
545 printf("detrunc(): allerror %d, eofentry %lu\n",
546 allerror, eofentry);
547#endif
548
549 /*
550 * If we need to break the cluster chain for the file then do it
551 * now.
552 */
553 if (eofentry != ~0) {
554 error = fatentry(FAT_GET_AND_SET, pmp, eofentry,
555 &chaintofree, CLUST_EOFE);
556 if (error) {
557#ifdef MSDOSFS_DEBUG
558 printf("detrunc(): fatentry errors %d\n", error);
559#endif
560 return (error);
561 }
562 fc_setcache(dep, FC_LASTFC, de_cluster(pmp, length - 1),
563 eofentry);
564 }
565
566 /*
567 * Now free the clusters removed from the file because of the
568 * truncation.
569 */
570 if (chaintofree != 0 && !MSDOSFSEOF(pmp, chaintofree))
571 freeclusterchain(pmp, chaintofree);
572
573 return (allerror);
574}
575
576/*
577 * Extend the file described by dep to length specified by length.
578 */
579int
4625f023 580deextend(struct denode *dep, u_long length)
984263bc
MD
581{
582 struct msdosfsmount *pmp = dep->de_pmp;
583 u_long count;
584 int error;
585
586 /*
587 * The root of a DOS filesystem cannot be extended.
588 */
589 if ((DETOV(dep)->v_flag & VROOT) && !FAT32(pmp))
590 return (EINVAL);
591
592 /*
593 * Directories cannot be extended.
594 */
595 if (dep->de_Attributes & ATTR_DIRECTORY)
596 return (EISDIR);
597
598 if (length <= dep->de_FileSize)
599 panic("deextend: file too large");
600
601 /*
602 * Compute the number of clusters to allocate.
603 */
604 count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize);
605 if (count > 0) {
606 if (count > pmp->pm_freeclustercount)
607 return (ENOSPC);
608 error = extendfile(dep, count, NULL, NULL, DE_CLEAR);
609 if (error) {
610 /* truncate the added clusters away again */
3b568787 611 (void) detrunc(dep, dep->de_FileSize, 0, NULL);
984263bc
MD
612 return (error);
613 }
614 }
615 dep->de_FileSize = length;
616 dep->de_flag |= DE_UPDATE|DE_MODIFIED;
617 return (deupdat(dep, 1));
618}
619
620/*
621 * Move a denode to its correct hash queue after the file it represents has
622 * been moved to a new directory.
623 */
624void
4625f023 625reinsert(struct denode *dep)
984263bc
MD
626{
627 /*
628 * Fix up the denode cache. If the denode is for a directory,
629 * there is nothing to do since the hash is based on the starting
630 * cluster of the directory file and that hasn't changed. If for a
631 * file the hash is based on the location of the directory entry,
632 * so we must remove it from the cache and re-enter it with the
633 * hash based on the new location of the directory entry.
634 */
635 if (dep->de_Attributes & ATTR_DIRECTORY)
636 return;
637 msdosfs_hashrem(dep);
638 msdosfs_hashins(dep);
639}
640
4625f023
CP
641/*
642 * msdosfs_reclaim(struct vnode *a_vp)
643 */
984263bc 644int
4625f023 645msdosfs_reclaim(struct vop_reclaim_args *ap)
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646{
647 struct vnode *vp = ap->a_vp;
648 struct denode *dep = VTODE(vp);
649
650#ifdef MSDOSFS_DEBUG
651 printf("msdosfs_reclaim(): dep %p, file %s, refcnt %ld\n",
652 dep, dep->de_Name, dep->de_refcnt);
653#endif
654
655 if (prtactive && vp->v_usecount != 0)
656 vprint("msdosfs_reclaim(): pushing active", vp);
657 /*
658 * Remove the denode from its hash chain.
659 */
660 msdosfs_hashrem(dep);
661 /*
662 * Purge old data structures associated with the denode.
663 */
664 cache_purge(vp);
665 if (dep->de_devvp) {
666 vrele(dep->de_devvp);
667 dep->de_devvp = 0;
668 }
669#if 0 /* XXX */
670 dep->de_flag = 0;
671#endif
672 FREE(dep, M_MSDOSFSNODE);
673 vp->v_data = NULL;
674
675 return (0);
676}
677
4625f023
CP
678/*
679 * msdosfs_inactive(struct vnode *a_vp, struct thread *a_td)
680 */
984263bc 681int
4625f023 682msdosfs_inactive(struct vop_inactive_args *ap)
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MD
683{
684 struct vnode *vp = ap->a_vp;
685 struct denode *dep = VTODE(vp);
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686 int error = 0;
687
688#ifdef MSDOSFS_DEBUG
689 printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]);
690#endif
691
692 if (prtactive && vp->v_usecount != 0)
693 vprint("msdosfs_inactive(): pushing active", vp);
694
695 /*
696 * Ignore denodes related to stale file handles.
697 */
698 if (dep->de_Name[0] == SLOT_DELETED)
699 goto out;
700
701 /*
702 * If the file has been deleted and it is on a read/write
703 * filesystem, then truncate the file, and mark the directory slot
704 * as empty. (This may not be necessary for the dos filesystem.)
705 */
706#ifdef MSDOSFS_DEBUG
707 printf("msdosfs_inactive(): dep %p, refcnt %ld, mntflag %x, MNT_RDONLY %x\n",
708 dep, dep->de_refcnt, vp->v_mount->mnt_flag, MNT_RDONLY);
709#endif
710 if (dep->de_refcnt <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3b568787 711 error = detrunc(dep, (u_long) 0, 0, ap->a_td);
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712 dep->de_flag |= DE_UPDATE;
713 dep->de_Name[0] = SLOT_DELETED;
714 }
715 deupdat(dep, 0);
716
717out:
41a01a4d 718 VOP_UNLOCK(vp, NULL, 0, ap->a_td);
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MD
719 /*
720 * If we are done with the denode, reclaim it
721 * so that it can be reused immediately.
722 */
723#ifdef MSDOSFS_DEBUG
724 printf("msdosfs_inactive(): v_usecount %d, de_Name[0] %x\n", vp->v_usecount,
725 dep->de_Name[0]);
726#endif
727 if (dep->de_Name[0] == SLOT_DELETED)
8a8d5d85 728 vrecycle(vp, NULL, ap->a_td);
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729 return (error);
730}