xref: /freebsd/sys/fs/ext2fs/ext2_inode.c (revision 4f52dfbb8d6c4d446500c5b097e3806ec219fbd4)
1 /*-
2  *  modified for Lites 1.1
3  *
4  *  Aug 1995, Godmar Back (gback@cs.utah.edu)
5  *  University of Utah, Department of Computer Science
6  */
7 /*-
8  * SPDX-License-Identifier: BSD-3-Clause
9  *
10  * Copyright (c) 1982, 1986, 1989, 1993
11  *	The Regents of the University of California.  All rights reserved.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  * 3. Neither the name of the University nor the names of its contributors
22  *    may be used to endorse or promote products derived from this software
23  *    without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  *	@(#)ffs_inode.c	8.5 (Berkeley) 12/30/93
38  * $FreeBSD$
39  */
40 
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/mount.h>
44 #include <sys/bio.h>
45 #include <sys/buf.h>
46 #include <sys/vnode.h>
47 #include <sys/malloc.h>
48 #include <sys/rwlock.h>
49 
50 #include <vm/vm.h>
51 #include <vm/vm_extern.h>
52 
53 #include <fs/ext2fs/inode.h>
54 #include <fs/ext2fs/ext2_mount.h>
55 #include <fs/ext2fs/ext2fs.h>
56 #include <fs/ext2fs/fs.h>
57 #include <fs/ext2fs/ext2_extern.h>
58 #include <fs/ext2fs/ext2_extattr.h>
59 
60 /*
61  * Update the access, modified, and inode change times as specified by the
62  * IN_ACCESS, IN_UPDATE, and IN_CHANGE flags respectively.  Write the inode
63  * to disk if the IN_MODIFIED flag is set (it may be set initially, or by
64  * the timestamp update).  The IN_LAZYMOD flag is set to force a write
65  * later if not now.  If we write now, then clear both IN_MODIFIED and
66  * IN_LAZYMOD to reflect the presumably successful write, and if waitfor is
67  * set, then wait for the write to complete.
68  */
69 int
70 ext2_update(struct vnode *vp, int waitfor)
71 {
72 	struct m_ext2fs *fs;
73 	struct buf *bp;
74 	struct inode *ip;
75 	int error;
76 
77 	ASSERT_VOP_ELOCKED(vp, "ext2_update");
78 	ext2_itimes(vp);
79 	ip = VTOI(vp);
80 	if ((ip->i_flag & IN_MODIFIED) == 0 && waitfor == 0)
81 		return (0);
82 	ip->i_flag &= ~(IN_LAZYACCESS | IN_LAZYMOD | IN_MODIFIED);
83 	fs = ip->i_e2fs;
84 	if (fs->e2fs_ronly)
85 		return (0);
86 	if ((error = bread(ip->i_devvp,
87 	    fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
88 	    (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
89 		brelse(bp);
90 		return (error);
91 	}
92 	error = ext2_i2ei(ip, (struct ext2fs_dinode *)((char *)bp->b_data +
93 	    EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number)));
94 	if (error) {
95 		brelse(bp);
96 		return (error);
97 	}
98 	if (waitfor && !DOINGASYNC(vp))
99 		return (bwrite(bp));
100 	else {
101 		bdwrite(bp);
102 		return (0);
103 	}
104 }
105 
106 #define	SINGLE	0	/* index of single indirect block */
107 #define	DOUBLE	1	/* index of double indirect block */
108 #define	TRIPLE	2	/* index of triple indirect block */
109 
110 /*
111  * Release blocks associated with the inode ip and stored in the indirect
112  * block bn.  Blocks are free'd in LIFO order up to (but not including)
113  * lastbn.  If level is greater than SINGLE, the block is an indirect block
114  * and recursive calls to indirtrunc must be used to cleanse other indirect
115  * blocks.
116  *
117  * NB: triple indirect blocks are untested.
118  */
119 static int
120 ext2_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn,
121     daddr_t lastbn, int level, e4fs_daddr_t *countp)
122 {
123 	struct buf *bp;
124 	struct m_ext2fs *fs = ip->i_e2fs;
125 	struct vnode *vp;
126 	e2fs_daddr_t *bap, *copy;
127 	int i, nblocks, error = 0, allerror = 0;
128 	e2fs_lbn_t nb, nlbn, last;
129 	e4fs_daddr_t blkcount, factor, blocksreleased = 0;
130 
131 	/*
132 	 * Calculate index in current block of last
133 	 * block to be kept.  -1 indicates the entire
134 	 * block so we need not calculate the index.
135 	 */
136 	factor = 1;
137 	for (i = SINGLE; i < level; i++)
138 		factor *= NINDIR(fs);
139 	last = lastbn;
140 	if (lastbn > 0)
141 		last /= factor;
142 	nblocks = btodb(fs->e2fs_bsize);
143 	/*
144 	 * Get buffer of block pointers, zero those entries corresponding
145 	 * to blocks to be free'd, and update on disk copy first.  Since
146 	 * double(triple) indirect before single(double) indirect, calls
147 	 * to bmap on these blocks will fail.  However, we already have
148 	 * the on disk address, so we have to set the b_blkno field
149 	 * explicitly instead of letting bread do everything for us.
150 	 */
151 	vp = ITOV(ip);
152 	bp = getblk(vp, lbn, (int)fs->e2fs_bsize, 0, 0, 0);
153 	if ((bp->b_flags & (B_DONE | B_DELWRI)) == 0) {
154 		bp->b_iocmd = BIO_READ;
155 		if (bp->b_bcount > bp->b_bufsize)
156 			panic("ext2_indirtrunc: bad buffer size");
157 		bp->b_blkno = dbn;
158 		vfs_busy_pages(bp, 0);
159 		bp->b_iooffset = dbtob(bp->b_blkno);
160 		bstrategy(bp);
161 		error = bufwait(bp);
162 	}
163 	if (error) {
164 		brelse(bp);
165 		*countp = 0;
166 		return (error);
167 	}
168 	bap = (e2fs_daddr_t *)bp->b_data;
169 	copy = malloc(fs->e2fs_bsize, M_TEMP, M_WAITOK);
170 	bcopy((caddr_t)bap, (caddr_t)copy, (u_int)fs->e2fs_bsize);
171 	bzero((caddr_t)&bap[last + 1],
172 	    (NINDIR(fs) - (last + 1)) * sizeof(e2fs_daddr_t));
173 	if (last == -1)
174 		bp->b_flags |= B_INVAL;
175 	if (DOINGASYNC(vp)) {
176 		bdwrite(bp);
177 	} else {
178 		error = bwrite(bp);
179 		if (error)
180 			allerror = error;
181 	}
182 	bap = copy;
183 
184 	/*
185 	 * Recursively free totally unused blocks.
186 	 */
187 	for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
188 	    i--, nlbn += factor) {
189 		nb = bap[i];
190 		if (nb == 0)
191 			continue;
192 		if (level > SINGLE) {
193 			if ((error = ext2_indirtrunc(ip, nlbn,
194 			    fsbtodb(fs, nb), (int32_t)-1, level - 1, &blkcount)) != 0)
195 				allerror = error;
196 			blocksreleased += blkcount;
197 		}
198 		ext2_blkfree(ip, nb, fs->e2fs_bsize);
199 		blocksreleased += nblocks;
200 	}
201 
202 	/*
203 	 * Recursively free last partial block.
204 	 */
205 	if (level > SINGLE && lastbn >= 0) {
206 		last = lastbn % factor;
207 		nb = bap[i];
208 		if (nb != 0) {
209 			if ((error = ext2_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
210 			    last, level - 1, &blkcount)) != 0)
211 				allerror = error;
212 			blocksreleased += blkcount;
213 		}
214 	}
215 	free(copy, M_TEMP);
216 	*countp = blocksreleased;
217 	return (allerror);
218 }
219 
220 /*
221  * Truncate the inode oip to at most length size, freeing the
222  * disk blocks.
223  */
224 static int
225 ext2_ind_truncate(struct vnode *vp, off_t length, int flags, struct ucred *cred,
226     struct thread *td)
227 {
228 	struct vnode *ovp = vp;
229 	e4fs_daddr_t lastblock;
230 	struct inode *oip;
231 	e4fs_daddr_t bn, lbn, lastiblock[EXT2_NIADDR], indir_lbn[EXT2_NIADDR];
232 	uint32_t oldblks[EXT2_NDADDR + EXT2_NIADDR];
233 	uint32_t newblks[EXT2_NDADDR + EXT2_NIADDR];
234 	struct m_ext2fs *fs;
235 	struct buf *bp;
236 	int offset, size, level;
237 	e4fs_daddr_t count, nblocks, blocksreleased = 0;
238 	int error, i, allerror;
239 	off_t osize;
240 #ifdef INVARIANTS
241 	struct bufobj *bo;
242 #endif
243 
244 	oip = VTOI(ovp);
245 #ifdef INVARIANTS
246 	bo = &ovp->v_bufobj;
247 #endif
248 
249 	fs = oip->i_e2fs;
250 	osize = oip->i_size;
251 	/*
252 	 * Lengthen the size of the file. We must ensure that the
253 	 * last byte of the file is allocated. Since the smallest
254 	 * value of osize is 0, length will be at least 1.
255 	 */
256 	if (osize < length) {
257 		if (length > oip->i_e2fs->e2fs_maxfilesize)
258 			return (EFBIG);
259 		vnode_pager_setsize(ovp, length);
260 		offset = blkoff(fs, length - 1);
261 		lbn = lblkno(fs, length - 1);
262 		flags |= BA_CLRBUF;
263 		error = ext2_balloc(oip, lbn, offset + 1, cred, &bp, flags);
264 		if (error) {
265 			vnode_pager_setsize(vp, osize);
266 			return (error);
267 		}
268 		oip->i_size = length;
269 		if (bp->b_bufsize == fs->e2fs_bsize)
270 			bp->b_flags |= B_CLUSTEROK;
271 		if (flags & IO_SYNC)
272 			bwrite(bp);
273 		else if (DOINGASYNC(ovp))
274 			bdwrite(bp);
275 		else
276 			bawrite(bp);
277 		oip->i_flag |= IN_CHANGE | IN_UPDATE;
278 		return (ext2_update(ovp, !DOINGASYNC(ovp)));
279 	}
280 	/*
281 	 * Shorten the size of the file. If the file is not being
282 	 * truncated to a block boundary, the contents of the
283 	 * partial block following the end of the file must be
284 	 * zero'ed in case it ever become accessible again because
285 	 * of subsequent file growth.
286 	 */
287 	/* I don't understand the comment above */
288 	offset = blkoff(fs, length);
289 	if (offset == 0) {
290 		oip->i_size = length;
291 	} else {
292 		lbn = lblkno(fs, length);
293 		flags |= BA_CLRBUF;
294 		error = ext2_balloc(oip, lbn, offset, cred, &bp, flags);
295 		if (error)
296 			return (error);
297 		oip->i_size = length;
298 		size = blksize(fs, oip, lbn);
299 		bzero((char *)bp->b_data + offset, (u_int)(size - offset));
300 		allocbuf(bp, size);
301 		if (bp->b_bufsize == fs->e2fs_bsize)
302 			bp->b_flags |= B_CLUSTEROK;
303 		if (flags & IO_SYNC)
304 			bwrite(bp);
305 		else if (DOINGASYNC(ovp))
306 			bdwrite(bp);
307 		else
308 			bawrite(bp);
309 	}
310 	/*
311 	 * Calculate index into inode's block list of
312 	 * last direct and indirect blocks (if any)
313 	 * which we want to keep.  Lastblock is -1 when
314 	 * the file is truncated to 0.
315 	 */
316 	lastblock = lblkno(fs, length + fs->e2fs_bsize - 1) - 1;
317 	lastiblock[SINGLE] = lastblock - EXT2_NDADDR;
318 	lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
319 	lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
320 	nblocks = btodb(fs->e2fs_bsize);
321 	/*
322 	 * Update file and block pointers on disk before we start freeing
323 	 * blocks.  If we crash before free'ing blocks below, the blocks
324 	 * will be returned to the free list.  lastiblock values are also
325 	 * normalized to -1 for calls to ext2_indirtrunc below.
326 	 */
327 	for (level = TRIPLE; level >= SINGLE; level--) {
328 		oldblks[EXT2_NDADDR + level] = oip->i_ib[level];
329 		if (lastiblock[level] < 0) {
330 			oip->i_ib[level] = 0;
331 			lastiblock[level] = -1;
332 		}
333 	}
334 	for (i = 0; i < EXT2_NDADDR; i++) {
335 		oldblks[i] = oip->i_db[i];
336 		if (i > lastblock)
337 			oip->i_db[i] = 0;
338 	}
339 	oip->i_flag |= IN_CHANGE | IN_UPDATE;
340 	allerror = ext2_update(ovp, !DOINGASYNC(ovp));
341 
342 	/*
343 	 * Having written the new inode to disk, save its new configuration
344 	 * and put back the old block pointers long enough to process them.
345 	 * Note that we save the new block configuration so we can check it
346 	 * when we are done.
347 	 */
348 	for (i = 0; i < EXT2_NDADDR; i++) {
349 		newblks[i] = oip->i_db[i];
350 		oip->i_db[i] = oldblks[i];
351 	}
352 	for (i = 0; i < EXT2_NIADDR; i++) {
353 		newblks[EXT2_NDADDR + i] = oip->i_ib[i];
354 		oip->i_ib[i] = oldblks[EXT2_NDADDR + i];
355 	}
356 	oip->i_size = osize;
357 	error = vtruncbuf(ovp, cred, length, (int)fs->e2fs_bsize);
358 	if (error && (allerror == 0))
359 		allerror = error;
360 	vnode_pager_setsize(ovp, length);
361 
362 	/*
363 	 * Indirect blocks first.
364 	 */
365 	indir_lbn[SINGLE] = -EXT2_NDADDR;
366 	indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
367 	indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
368 	for (level = TRIPLE; level >= SINGLE; level--) {
369 		bn = oip->i_ib[level];
370 		if (bn != 0) {
371 			error = ext2_indirtrunc(oip, indir_lbn[level],
372 			    fsbtodb(fs, bn), lastiblock[level], level, &count);
373 			if (error)
374 				allerror = error;
375 			blocksreleased += count;
376 			if (lastiblock[level] < 0) {
377 				oip->i_ib[level] = 0;
378 				ext2_blkfree(oip, bn, fs->e2fs_fsize);
379 				blocksreleased += nblocks;
380 			}
381 		}
382 		if (lastiblock[level] >= 0)
383 			goto done;
384 	}
385 
386 	/*
387 	 * All whole direct blocks or frags.
388 	 */
389 	for (i = EXT2_NDADDR - 1; i > lastblock; i--) {
390 		long bsize;
391 
392 		bn = oip->i_db[i];
393 		if (bn == 0)
394 			continue;
395 		oip->i_db[i] = 0;
396 		bsize = blksize(fs, oip, i);
397 		ext2_blkfree(oip, bn, bsize);
398 		blocksreleased += btodb(bsize);
399 	}
400 	if (lastblock < 0)
401 		goto done;
402 
403 	/*
404 	 * Finally, look for a change in size of the
405 	 * last direct block; release any frags.
406 	 */
407 	bn = oip->i_db[lastblock];
408 	if (bn != 0) {
409 		long oldspace, newspace;
410 
411 		/*
412 		 * Calculate amount of space we're giving
413 		 * back as old block size minus new block size.
414 		 */
415 		oldspace = blksize(fs, oip, lastblock);
416 		oip->i_size = length;
417 		newspace = blksize(fs, oip, lastblock);
418 		if (newspace == 0)
419 			panic("ext2_truncate: newspace");
420 		if (oldspace - newspace > 0) {
421 			/*
422 			 * Block number of space to be free'd is
423 			 * the old block # plus the number of frags
424 			 * required for the storage we're keeping.
425 			 */
426 			bn += numfrags(fs, newspace);
427 			ext2_blkfree(oip, bn, oldspace - newspace);
428 			blocksreleased += btodb(oldspace - newspace);
429 		}
430 	}
431 done:
432 #ifdef INVARIANTS
433 	for (level = SINGLE; level <= TRIPLE; level++)
434 		if (newblks[EXT2_NDADDR + level] != oip->i_ib[level])
435 			panic("itrunc1");
436 	for (i = 0; i < EXT2_NDADDR; i++)
437 		if (newblks[i] != oip->i_db[i])
438 			panic("itrunc2");
439 	BO_LOCK(bo);
440 	if (length == 0 && (bo->bo_dirty.bv_cnt != 0 ||
441 	    bo->bo_clean.bv_cnt != 0))
442 		panic("itrunc3");
443 	BO_UNLOCK(bo);
444 #endif	/* INVARIANTS */
445 	/*
446 	 * Put back the real size.
447 	 */
448 	oip->i_size = length;
449 	if (oip->i_blocks >= blocksreleased)
450 		oip->i_blocks -= blocksreleased;
451 	else				/* sanity */
452 		oip->i_blocks = 0;
453 	oip->i_flag |= IN_CHANGE;
454 	vnode_pager_setsize(ovp, length);
455 	return (allerror);
456 }
457 
458 static int
459 ext2_ext_truncate(struct vnode *vp, off_t length, int flags,
460     struct ucred *cred, struct thread *td)
461 {
462 	struct vnode *ovp = vp;
463 	int32_t lastblock;
464 	struct m_ext2fs *fs;
465 	struct inode *oip;
466 	struct buf *bp;
467 	uint32_t lbn, offset;
468 	int error, size;
469 	off_t osize;
470 
471 	oip = VTOI(ovp);
472 	fs = oip->i_e2fs;
473 	osize = oip->i_size;
474 
475 	if (osize < length) {
476 		if (length > oip->i_e2fs->e2fs_maxfilesize) {
477 			return (EFBIG);
478 		}
479 		vnode_pager_setsize(ovp, length);
480 		offset = blkoff(fs, length - 1);
481 		lbn = lblkno(fs, length - 1);
482 		flags |= BA_CLRBUF;
483 		error = ext2_balloc(oip, lbn, offset + 1, cred, &bp, flags);
484 		if (error) {
485 			vnode_pager_setsize(vp, osize);
486 			return (error);
487 		}
488 		oip->i_size = length;
489 		if (bp->b_bufsize == fs->e2fs_bsize)
490 			bp->b_flags |= B_CLUSTEROK;
491 		if (flags & IO_SYNC)
492 			bwrite(bp);
493 		else if (DOINGASYNC(ovp))
494 			bdwrite(bp);
495 		else
496 			bawrite(bp);
497 		oip->i_flag |= IN_CHANGE | IN_UPDATE;
498 		return (ext2_update(ovp, !DOINGASYNC(ovp)));
499 	}
500 
501 	lastblock = (length + fs->e2fs_bsize - 1) / fs->e2fs_bsize;
502 	error = ext4_ext_remove_space(oip, lastblock, flags, cred, td);
503 	if (error)
504 		return (error);
505 
506 	offset = blkoff(fs, length);
507 	if (offset == 0) {
508 		oip->i_size = length;
509 	} else {
510 		lbn = lblkno(fs, length);
511 		flags |= BA_CLRBUF;
512 		error = ext2_balloc(oip, lbn, offset, cred, &bp, flags);
513 		if (error) {
514 			return (error);
515 		}
516 		oip->i_size = length;
517 		size = blksize(fs, oip, lbn);
518 		bzero((char *)bp->b_data + offset, (u_int)(size - offset));
519 		allocbuf(bp, size);
520 		if (bp->b_bufsize == fs->e2fs_bsize)
521 			bp->b_flags |= B_CLUSTEROK;
522 		if (flags & IO_SYNC)
523 			bwrite(bp);
524 		else if (DOINGASYNC(ovp))
525 			bdwrite(bp);
526 		else
527 			bawrite(bp);
528 	}
529 
530 	oip->i_size = osize;
531 	error = vtruncbuf(ovp, cred, length, (int)fs->e2fs_bsize);
532 	if (error)
533 		return (error);
534 
535 	vnode_pager_setsize(ovp, length);
536 
537 	oip->i_size = length;
538 	oip->i_flag |= IN_CHANGE | IN_UPDATE;
539 	error = ext2_update(ovp, !DOINGASYNC(ovp));
540 
541 	return (error);
542 }
543 
544 /*
545  * Truncate the inode ip to at most length size, freeing the
546  * disk blocks.
547  */
548 int
549 ext2_truncate(struct vnode *vp, off_t length, int flags, struct ucred *cred,
550     struct thread *td)
551 {
552 	struct inode *ip;
553 	int error;
554 
555 	ASSERT_VOP_LOCKED(vp, "ext2_truncate");
556 
557 	if (length < 0)
558 		return (EINVAL);
559 
560 	ip = VTOI(vp);
561 	if (vp->v_type == VLNK &&
562 	    ip->i_size < vp->v_mount->mnt_maxsymlinklen) {
563 #ifdef INVARIANTS
564 		if (length != 0)
565 			panic("ext2_truncate: partial truncate of symlink");
566 #endif
567 		bzero((char *)&ip->i_shortlink, (u_int)ip->i_size);
568 		ip->i_size = 0;
569 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
570 		return (ext2_update(vp, 1));
571 	}
572 	if (ip->i_size == length) {
573 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
574 		return (ext2_update(vp, 0));
575 	}
576 
577 	if (ip->i_flag & IN_E4EXTENTS)
578 		error = ext2_ext_truncate(vp, length, flags, cred, td);
579 	else
580 		error = ext2_ind_truncate(vp, length, flags, cred, td);
581 
582 	return (error);
583 }
584 
585 /*
586  *	discard preallocated blocks
587  */
588 int
589 ext2_inactive(struct vop_inactive_args *ap)
590 {
591 	struct vnode *vp = ap->a_vp;
592 	struct inode *ip = VTOI(vp);
593 	struct thread *td = ap->a_td;
594 	int mode, error = 0;
595 
596 	/*
597 	 * Ignore inodes related to stale file handles.
598 	 */
599 	if (ip->i_mode == 0)
600 		goto out;
601 	if (ip->i_nlink <= 0) {
602 		ext2_extattr_free(ip);
603 		error = ext2_truncate(vp, (off_t)0, 0, NOCRED, td);
604 		if (!(ip->i_flag & IN_E4EXTENTS))
605 			ip->i_rdev = 0;
606 		mode = ip->i_mode;
607 		ip->i_mode = 0;
608 		ip->i_flag |= IN_CHANGE | IN_UPDATE;
609 		ext2_vfree(vp, ip->i_number, mode);
610 	}
611 	if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE))
612 		ext2_update(vp, 0);
613 out:
614 	/*
615 	 * If we are done with the inode, reclaim it
616 	 * so that it can be reused immediately.
617 	 */
618 	if (ip->i_mode == 0)
619 		vrecycle(vp);
620 	return (error);
621 }
622 
623 /*
624  * Reclaim an inode so that it can be used for other purposes.
625  */
626 int
627 ext2_reclaim(struct vop_reclaim_args *ap)
628 {
629 	struct inode *ip;
630 	struct vnode *vp = ap->a_vp;
631 
632 	ip = VTOI(vp);
633 	if (ip->i_flag & IN_LAZYMOD) {
634 		ip->i_flag |= IN_MODIFIED;
635 		ext2_update(vp, 0);
636 	}
637 	vfs_hash_remove(vp);
638 	free(vp->v_data, M_EXT2NODE);
639 	vp->v_data = 0;
640 	vnode_destroy_vobject(vp);
641 	return (0);
642 }
643