Change WAIT_FOR_AUTO_NEG_DEFAULT to 0. Do not wait for auto-negotiation to
[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 $ */
41a01a4d 2/* $DragonFly: src/sys/vfs/msdosfs/msdosfs_denode.c,v 1.10 2004/03/01 06:33:21 dillon Exp $ */
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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
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MD
64#include "bpb.h"
65#include "msdosfsmount.h"
66#include "direntry.h"
67#include "denode.h"
68#include "fat.h"
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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;
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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
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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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100
101/*ARGSUSED*/
102int
103msdosfs_init(vfsp)
104 struct vfsconf *vfsp;
105{
106 dehashtbl = hashinit(desiredvnodes/2, M_MSDOSFSMNT, &dehash);
41a01a4d 107 lwkt_token_init(&dehash_token);
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108 return (0);
109}
110
111int
112msdosfs_uninit(vfsp)
113 struct vfsconf *vfsp;
114{
115
116 if (dehashtbl)
117 free(dehashtbl, M_MSDOSFSMNT);
118 return (0);
119}
120
121static struct denode *
122msdosfs_hashget(dev, dirclust, diroff)
123 dev_t dev;
124 u_long dirclust;
125 u_long diroff;
126{
dadab5e9 127 struct thread *td = curthread; /* XXX */
984263bc 128 struct denode *dep;
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129 lwkt_tokref ilock;
130 lwkt_tokref vlock;
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131 struct vnode *vp;
132
41a01a4d 133 lwkt_gettoken(&ilock, &dehash_token);
984263bc 134loop:
984263bc 135 for (dep = DEHASH(dev, dirclust, diroff); dep; dep = dep->de_next) {
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136 if (dirclust != dep->de_dirclust
137 || diroff != dep->de_diroffset
138 || dev != dep->de_dev
139 || dep->de_refcnt == 0) {
140 continue;
141 }
142 vp = DETOV(dep);
143 lwkt_gettoken(&vlock, vp->v_interlock);
144 /*
145 * We must check to see if the inode has been ripped
146 * out from under us after blocking.
147 */
148 for (dep = DEHASH(dev, dirclust, diroff); dep; dep = dep->de_next) {
149 if (dirclust == dep->de_dirclust
150 && diroff == dep->de_diroffset
151 && dev == dep->de_dev
152 && dep->de_refcnt != 0) {
153 break;
4954c633 154 }
984263bc 155 }
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156 if (dep == NULL || DETOV(dep) != vp) {
157 lwkt_reltoken(&vlock);
158 goto loop;
159 }
160 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
161 goto loop;
162 lwkt_reltoken(&ilock);
163 return (dep);
984263bc 164 }
41a01a4d 165 lwkt_reltoken(&ilock);
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166 return (NULL);
167}
168
169static void
170msdosfs_hashins(dep)
171 struct denode *dep;
172{
173 struct denode **depp, *deq;
41a01a4d 174 lwkt_tokref ilock;
984263bc 175
41a01a4d 176 lwkt_gettoken(&ilock, &dehash_token);
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177 depp = &DEHASH(dep->de_dev, dep->de_dirclust, dep->de_diroffset);
178 deq = *depp;
179 if (deq)
180 deq->de_prev = &dep->de_next;
181 dep->de_next = deq;
182 dep->de_prev = depp;
183 *depp = dep;
41a01a4d 184 lwkt_reltoken(&ilock);
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185}
186
187static void
188msdosfs_hashrem(dep)
189 struct denode *dep;
190{
191 struct denode *deq;
41a01a4d 192 lwkt_tokref ilock;
984263bc 193
41a01a4d 194 lwkt_gettoken(&ilock, &dehash_token);
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195 deq = dep->de_next;
196 if (deq)
197 deq->de_prev = dep->de_prev;
198 *dep->de_prev = deq;
199#ifdef DIAGNOSTIC
200 dep->de_next = NULL;
201 dep->de_prev = NULL;
202#endif
41a01a4d 203 lwkt_reltoken(&ilock);
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204}
205
206/*
207 * If deget() succeeds it returns with the gotten denode locked().
208 *
209 * pmp - address of msdosfsmount structure of the filesystem containing
210 * the denode of interest. The pm_dev field and the address of
211 * the msdosfsmount structure are used.
212 * dirclust - which cluster bp contains, if dirclust is 0 (root directory)
213 * diroffset is relative to the beginning of the root directory,
214 * otherwise it is cluster relative.
215 * diroffset - offset past begin of cluster of denode we want
216 * depp - returns the address of the gotten denode.
217 */
218int
219deget(pmp, dirclust, diroffset, depp)
220 struct msdosfsmount *pmp; /* so we know the maj/min number */
221 u_long dirclust; /* cluster this dir entry came from */
222 u_long diroffset; /* index of entry within the cluster */
223 struct denode **depp; /* returns the addr of the gotten denode */
224{
dadab5e9 225 struct thread *td = curthread; /* XXX */
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226 int error;
227 dev_t dev = pmp->pm_dev;
228 struct mount *mntp = pmp->pm_mountp;
229 struct direntry *direntptr;
230 struct denode *ldep;
231 struct vnode *nvp;
232 struct buf *bp;
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233 struct timeval tv;
234
235#ifdef MSDOSFS_DEBUG
236 printf("deget(pmp %p, dirclust %lu, diroffset %lx, depp %p)\n",
237 pmp, dirclust, diroffset, depp);
238#endif
239
240 /*
241 * On FAT32 filesystems, root is a (more or less) normal
242 * directory
243 */
244 if (FAT32(pmp) && dirclust == MSDOSFSROOT)
245 dirclust = pmp->pm_rootdirblk;
246
247 /*
248 * See if the denode is in the denode cache. Use the location of
249 * the directory entry to compute the hash value. For subdir use
250 * address of "." entry. For root dir (if not FAT32) use cluster
251 * MSDOSFSROOT, offset MSDOSFSROOT_OFS
252 *
253 * NOTE: The check for de_refcnt > 0 below insures the denode being
254 * examined does not represent an unlinked but still open file.
255 * These files are not to be accessible even when the directory
256 * entry that represented the file happens to be reused while the
257 * deleted file is still open.
258 */
259 ldep = msdosfs_hashget(dev, dirclust, diroffset);
260 if (ldep) {
261 *depp = ldep;
262 return (0);
263 }
264
265 /*
266 * Do the MALLOC before the getnewvnode since doing so afterward
267 * might cause a bogus v_data pointer to get dereferenced
268 * elsewhere if MALLOC should block.
269 */
270 MALLOC(ldep, struct denode *, sizeof(struct denode), M_MSDOSFSNODE, M_WAITOK);
271
272 /*
273 * Directory entry was not in cache, have to create a vnode and
274 * copy it from the passed disk buffer.
275 */
276 /* getnewvnode() does a VREF() on the vnode */
277 error = getnewvnode(VT_MSDOSFS, mntp, msdosfs_vnodeop_p, &nvp);
278 if (error) {
279 *depp = NULL;
280 FREE(ldep, M_MSDOSFSNODE);
281 return error;
282 }
283 bzero((caddr_t)ldep, sizeof *ldep);
377d4740 284 lockinit(&ldep->de_lock, 0, "denode", VLKTIMEOUT, 0);
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285 nvp->v_data = ldep;
286 ldep->de_vnode = nvp;
287 ldep->de_flag = 0;
288 ldep->de_devvp = 0;
289 ldep->de_dev = dev;
290 ldep->de_dirclust = dirclust;
291 ldep->de_diroffset = diroffset;
292 fc_purge(ldep, 0); /* init the fat cache for this denode */
293
294 /*
295 * Lock the denode so that it can't be accessed until we've read
296 * it in and have done what we need to it. Do this here instead
297 * of at the start of msdosfs_hashins() so that reinsert() can
298 * call msdosfs_hashins() with a locked denode.
299 */
8a8d5d85 300 if (lockmgr(&ldep->de_lock, LK_EXCLUSIVE, NULL, td))
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301 panic("deget: unexpected lock failure");
302
303 /*
304 * Insert the denode into the hash queue.
305 */
306 msdosfs_hashins(ldep);
307
308 ldep->de_pmp = pmp;
309 ldep->de_refcnt = 1;
310 /*
311 * Copy the directory entry into the denode area of the vnode.
312 */
313 if ((dirclust == MSDOSFSROOT
314 || (FAT32(pmp) && dirclust == pmp->pm_rootdirblk))
315 && diroffset == MSDOSFSROOT_OFS) {
316 /*
317 * Directory entry for the root directory. There isn't one,
318 * so we manufacture one. We should probably rummage
319 * through the root directory and find a label entry (if it
320 * exists), and then use the time and date from that entry
321 * as the time and date for the root denode.
322 */
323 nvp->v_flag |= VROOT; /* should be further down XXX */
324
325 ldep->de_Attributes = ATTR_DIRECTORY;
326 ldep->de_LowerCase = 0;
327 if (FAT32(pmp))
328 ldep->de_StartCluster = pmp->pm_rootdirblk;
329 /* de_FileSize will be filled in further down */
330 else {
331 ldep->de_StartCluster = MSDOSFSROOT;
332 ldep->de_FileSize = pmp->pm_rootdirsize * DEV_BSIZE;
333 }
334 /*
335 * fill in time and date so that dos2unixtime() doesn't
336 * spit up when called from msdosfs_getattr() with root
337 * denode
338 */
339 ldep->de_CHun = 0;
340 ldep->de_CTime = 0x0000; /* 00:00:00 */
341 ldep->de_CDate = (0 << DD_YEAR_SHIFT) | (1 << DD_MONTH_SHIFT)
342 | (1 << DD_DAY_SHIFT);
343 /* Jan 1, 1980 */
344 ldep->de_ADate = ldep->de_CDate;
345 ldep->de_MTime = ldep->de_CTime;
346 ldep->de_MDate = ldep->de_CDate;
347 /* leave the other fields as garbage */
348 } else {
349 error = readep(pmp, dirclust, diroffset, &bp, &direntptr);
350 if (error) {
351 /*
352 * The denode does not contain anything useful, so
353 * it would be wrong to leave it on its hash chain.
354 * Arrange for vput() to just forget about it.
355 */
356 ldep->de_Name[0] = SLOT_DELETED;
357
358 vput(nvp);
359 *depp = NULL;
360 return (error);
361 }
362 DE_INTERNALIZE(ldep, direntptr);
363 brelse(bp);
364 }
365
366 /*
367 * Fill in a few fields of the vnode and finish filling in the
368 * denode. Then return the address of the found denode.
369 */
370 if (ldep->de_Attributes & ATTR_DIRECTORY) {
371 /*
372 * Since DOS directory entries that describe directories
373 * have 0 in the filesize field, we take this opportunity
374 * to find out the length of the directory and plug it into
375 * the denode structure.
376 */
377 u_long size;
378
379 /*
380 * XXX Sometimes, these arrives that . entry have cluster
381 * number 0, when it shouldn't. Use real cluster number
382 * instead of what is written in directory entry.
383 */
384 if ((diroffset == 0) && (ldep->de_StartCluster != dirclust)) {
385 printf("deget(): . entry at clust %ld != %ld\n",
386 dirclust, ldep->de_StartCluster);
387 ldep->de_StartCluster = dirclust;
388 }
389
390 nvp->v_type = VDIR;
391 if (ldep->de_StartCluster != MSDOSFSROOT) {
392 error = pcbmap(ldep, 0xffff, 0, &size, 0);
393 if (error == E2BIG) {
394 ldep->de_FileSize = de_cn2off(pmp, size);
395 error = 0;
396 } else
397 printf("deget(): pcbmap returned %d\n", error);
398 }
399 } else
400 nvp->v_type = VREG;
401 getmicrouptime(&tv);
402 SETHIGH(ldep->de_modrev, tv.tv_sec);
403 SETLOW(ldep->de_modrev, tv.tv_usec * 4294);
404 ldep->de_devvp = pmp->pm_devvp;
405 VREF(ldep->de_devvp);
406 *depp = ldep;
407 return (0);
408}
409
410int
411deupdat(dep, waitfor)
412 struct denode *dep;
413 int waitfor;
414{
415 int error;
416 struct buf *bp;
417 struct direntry *dirp;
418 struct timespec ts;
419
420 if (DETOV(dep)->v_mount->mnt_flag & MNT_RDONLY)
421 return (0);
422 getnanotime(&ts);
423 DETIMES(dep, &ts, &ts, &ts);
424 if ((dep->de_flag & DE_MODIFIED) == 0)
425 return (0);
426 dep->de_flag &= ~DE_MODIFIED;
427 if (dep->de_Attributes & ATTR_DIRECTORY)
428 return (0);
429 if (dep->de_refcnt <= 0)
430 return (0);
431 error = readde(dep, &bp, &dirp);
432 if (error)
433 return (error);
434 DE_EXTERNALIZE(dirp, dep);
435 if (waitfor)
436 return (bwrite(bp));
437 else {
438 bdwrite(bp);
439 return (0);
440 }
441}
442
443/*
444 * Truncate the file described by dep to the length specified by length.
445 */
446int
3b568787 447detrunc(dep, length, flags, td)
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448 struct denode *dep;
449 u_long length;
450 int flags;
dadab5e9 451 struct thread *td;
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452{
453 int error;
454 int allerror;
455 u_long eofentry;
456 u_long chaintofree;
457 daddr_t bn;
458 int boff;
459 int isadir = dep->de_Attributes & ATTR_DIRECTORY;
460 struct buf *bp;
461 struct msdosfsmount *pmp = dep->de_pmp;
462
463#ifdef MSDOSFS_DEBUG
464 printf("detrunc(): file %s, length %lu, flags %x\n", dep->de_Name, length, flags);
465#endif
466
467 /*
468 * Disallow attempts to truncate the root directory since it is of
469 * fixed size. That's just the way dos filesystems are. We use
470 * the VROOT bit in the vnode because checking for the directory
471 * bit and a startcluster of 0 in the denode is not adequate to
472 * recognize the root directory at this point in a file or
473 * directory's life.
474 */
475 if ((DETOV(dep)->v_flag & VROOT) && !FAT32(pmp)) {
476 printf("detrunc(): can't truncate root directory, clust %ld, offset %ld\n",
477 dep->de_dirclust, dep->de_diroffset);
478 return (EINVAL);
479 }
480
481
482 if (dep->de_FileSize < length) {
483 vnode_pager_setsize(DETOV(dep), length);
3b568787 484 return deextend(dep, length);
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485 }
486
487 /*
488 * If the desired length is 0 then remember the starting cluster of
489 * the file and set the StartCluster field in the directory entry
490 * to 0. If the desired length is not zero, then get the number of
491 * the last cluster in the shortened file. Then get the number of
492 * the first cluster in the part of the file that is to be freed.
493 * Then set the next cluster pointer in the last cluster of the
494 * file to CLUST_EOFE.
495 */
496 if (length == 0) {
497 chaintofree = dep->de_StartCluster;
498 dep->de_StartCluster = 0;
499 eofentry = ~0;
500 } else {
501 error = pcbmap(dep, de_clcount(pmp, length) - 1, 0,
502 &eofentry, 0);
503 if (error) {
504#ifdef MSDOSFS_DEBUG
505 printf("detrunc(): pcbmap fails %d\n", error);
506#endif
507 return (error);
508 }
509 }
510
511 fc_purge(dep, de_clcount(pmp, length));
512
513 /*
514 * If the new length is not a multiple of the cluster size then we
515 * must zero the tail end of the new last cluster in case it
516 * becomes part of the file again because of a seek.
517 */
518 if ((boff = length & pmp->pm_crbomask) != 0) {
519 if (isadir) {
520 bn = cntobn(pmp, eofentry);
3b568787 521 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
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522 } else {
523 bn = de_blk(pmp, length);
3b568787 524 error = bread(DETOV(dep), bn, pmp->pm_bpcluster, &bp);
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525 }
526 if (error) {
527 brelse(bp);
528#ifdef MSDOSFS_DEBUG
529 printf("detrunc(): bread fails %d\n", error);
530#endif
531 return (error);
532 }
533 /*
534 * is this the right place for it?
535 */
536 bzero(bp->b_data + boff, pmp->pm_bpcluster - boff);
537 if (flags & IO_SYNC)
538 bwrite(bp);
539 else
540 bdwrite(bp);
541 }
542
543 /*
544 * Write out the updated directory entry. Even if the update fails
545 * we free the trailing clusters.
546 */
547 dep->de_FileSize = length;
548 if (!isadir)
549 dep->de_flag |= DE_UPDATE|DE_MODIFIED;
3b568787 550 allerror = vtruncbuf(DETOV(dep), td, length, pmp->pm_bpcluster);
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551#ifdef MSDOSFS_DEBUG
552 if (allerror)
553 printf("detrunc(): vtruncbuf error %d\n", allerror);
554#endif
555 error = deupdat(dep, 1);
556 if (error && (allerror == 0))
557 allerror = error;
558#ifdef MSDOSFS_DEBUG
559 printf("detrunc(): allerror %d, eofentry %lu\n",
560 allerror, eofentry);
561#endif
562
563 /*
564 * If we need to break the cluster chain for the file then do it
565 * now.
566 */
567 if (eofentry != ~0) {
568 error = fatentry(FAT_GET_AND_SET, pmp, eofentry,
569 &chaintofree, CLUST_EOFE);
570 if (error) {
571#ifdef MSDOSFS_DEBUG
572 printf("detrunc(): fatentry errors %d\n", error);
573#endif
574 return (error);
575 }
576 fc_setcache(dep, FC_LASTFC, de_cluster(pmp, length - 1),
577 eofentry);
578 }
579
580 /*
581 * Now free the clusters removed from the file because of the
582 * truncation.
583 */
584 if (chaintofree != 0 && !MSDOSFSEOF(pmp, chaintofree))
585 freeclusterchain(pmp, chaintofree);
586
587 return (allerror);
588}
589
590/*
591 * Extend the file described by dep to length specified by length.
592 */
593int
3b568787 594deextend(dep, length)
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595 struct denode *dep;
596 u_long length;
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597{
598 struct msdosfsmount *pmp = dep->de_pmp;
599 u_long count;
600 int error;
601
602 /*
603 * The root of a DOS filesystem cannot be extended.
604 */
605 if ((DETOV(dep)->v_flag & VROOT) && !FAT32(pmp))
606 return (EINVAL);
607
608 /*
609 * Directories cannot be extended.
610 */
611 if (dep->de_Attributes & ATTR_DIRECTORY)
612 return (EISDIR);
613
614 if (length <= dep->de_FileSize)
615 panic("deextend: file too large");
616
617 /*
618 * Compute the number of clusters to allocate.
619 */
620 count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize);
621 if (count > 0) {
622 if (count > pmp->pm_freeclustercount)
623 return (ENOSPC);
624 error = extendfile(dep, count, NULL, NULL, DE_CLEAR);
625 if (error) {
626 /* truncate the added clusters away again */
3b568787 627 (void) detrunc(dep, dep->de_FileSize, 0, NULL);
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628 return (error);
629 }
630 }
631 dep->de_FileSize = length;
632 dep->de_flag |= DE_UPDATE|DE_MODIFIED;
633 return (deupdat(dep, 1));
634}
635
636/*
637 * Move a denode to its correct hash queue after the file it represents has
638 * been moved to a new directory.
639 */
640void
641reinsert(dep)
642 struct denode *dep;
643{
644 /*
645 * Fix up the denode cache. If the denode is for a directory,
646 * there is nothing to do since the hash is based on the starting
647 * cluster of the directory file and that hasn't changed. If for a
648 * file the hash is based on the location of the directory entry,
649 * so we must remove it from the cache and re-enter it with the
650 * hash based on the new location of the directory entry.
651 */
652 if (dep->de_Attributes & ATTR_DIRECTORY)
653 return;
654 msdosfs_hashrem(dep);
655 msdosfs_hashins(dep);
656}
657
658int
659msdosfs_reclaim(ap)
660 struct vop_reclaim_args /* {
661 struct vnode *a_vp;
662 } */ *ap;
663{
664 struct vnode *vp = ap->a_vp;
665 struct denode *dep = VTODE(vp);
666
667#ifdef MSDOSFS_DEBUG
668 printf("msdosfs_reclaim(): dep %p, file %s, refcnt %ld\n",
669 dep, dep->de_Name, dep->de_refcnt);
670#endif
671
672 if (prtactive && vp->v_usecount != 0)
673 vprint("msdosfs_reclaim(): pushing active", vp);
674 /*
675 * Remove the denode from its hash chain.
676 */
677 msdosfs_hashrem(dep);
678 /*
679 * Purge old data structures associated with the denode.
680 */
681 cache_purge(vp);
682 if (dep->de_devvp) {
683 vrele(dep->de_devvp);
684 dep->de_devvp = 0;
685 }
686#if 0 /* XXX */
687 dep->de_flag = 0;
688#endif
689 FREE(dep, M_MSDOSFSNODE);
690 vp->v_data = NULL;
691
692 return (0);
693}
694
695int
696msdosfs_inactive(ap)
697 struct vop_inactive_args /* {
698 struct vnode *a_vp;
dadab5e9 699 struct thread *a_td;
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700 } */ *ap;
701{
702 struct vnode *vp = ap->a_vp;
703 struct denode *dep = VTODE(vp);
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704 int error = 0;
705
706#ifdef MSDOSFS_DEBUG
707 printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]);
708#endif
709
710 if (prtactive && vp->v_usecount != 0)
711 vprint("msdosfs_inactive(): pushing active", vp);
712
713 /*
714 * Ignore denodes related to stale file handles.
715 */
716 if (dep->de_Name[0] == SLOT_DELETED)
717 goto out;
718
719 /*
720 * If the file has been deleted and it is on a read/write
721 * filesystem, then truncate the file, and mark the directory slot
722 * as empty. (This may not be necessary for the dos filesystem.)
723 */
724#ifdef MSDOSFS_DEBUG
725 printf("msdosfs_inactive(): dep %p, refcnt %ld, mntflag %x, MNT_RDONLY %x\n",
726 dep, dep->de_refcnt, vp->v_mount->mnt_flag, MNT_RDONLY);
727#endif
728 if (dep->de_refcnt <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3b568787 729 error = detrunc(dep, (u_long) 0, 0, ap->a_td);
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730 dep->de_flag |= DE_UPDATE;
731 dep->de_Name[0] = SLOT_DELETED;
732 }
733 deupdat(dep, 0);
734
735out:
41a01a4d 736 VOP_UNLOCK(vp, NULL, 0, ap->a_td);
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737 /*
738 * If we are done with the denode, reclaim it
739 * so that it can be reused immediately.
740 */
741#ifdef MSDOSFS_DEBUG
742 printf("msdosfs_inactive(): v_usecount %d, de_Name[0] %x\n", vp->v_usecount,
743 dep->de_Name[0]);
744#endif
745 if (dep->de_Name[0] == SLOT_DELETED)
8a8d5d85 746 vrecycle(vp, NULL, ap->a_td);
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747 return (error);
748}