1 /* $NetBSD: ext2fs_inode.c,v 1.89 2020/04/23 21:47:08 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ffs_inode.c 8.8 (Berkeley) 10/19/94 32 * Modified for ext2fs by Manuel Bouyer. 33 */ 34 35 /* 36 * Copyright (c) 1997 Manuel Bouyer. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 * 58 * @(#)ffs_inode.c 8.8 (Berkeley) 10/19/94 59 * Modified for ext2fs by Manuel Bouyer. 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: ext2fs_inode.c,v 1.89 2020/04/23 21:47:08 ad Exp $"); 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/mount.h> 68 #include <sys/proc.h> 69 #include <sys/file.h> 70 #include <sys/buf.h> 71 #include <sys/vnode.h> 72 #include <sys/kernel.h> 73 #include <sys/kmem.h> 74 #include <sys/trace.h> 75 #include <sys/resourcevar.h> 76 #include <sys/kauth.h> 77 78 #include <ufs/ufs/inode.h> 79 #include <ufs/ufs/ufsmount.h> 80 #include <ufs/ufs/ufs_extern.h> 81 82 #include <ufs/ext2fs/ext2fs.h> 83 #include <ufs/ext2fs/ext2fs_extern.h> 84 85 static int ext2fs_indirtrunc(struct inode *, daddr_t, daddr_t, 86 daddr_t, int, long *); 87 88 /* 89 * These are fortunately the same values; it is likely that there is 90 * code that assumes they're equal. In any event, neither ought to 91 * ever change because it's a property of the on-disk formats. 92 */ 93 CTASSERT(EXT2FS_NDADDR == UFS_NDADDR); 94 CTASSERT(EXT2FS_NIADDR == UFS_NIADDR); 95 96 /* 97 * Get the size of an inode. 98 */ 99 uint64_t 100 ext2fs_size(struct inode *ip) 101 { 102 uint64_t size = ip->i_e2fs_size; 103 104 if ((ip->i_e2fs_mode & IFMT) == IFREG) 105 size |= (uint64_t)ip->i_din.e2fs_din->e2di_size_high << 32; 106 return size; 107 } 108 109 int 110 ext2fs_setsize(struct inode *ip, uint64_t size) 111 { 112 if ((ip->i_e2fs_mode & IFMT) == IFREG || 113 ip->i_e2fs_mode == 0) { 114 ip->i_din.e2fs_din->e2di_size_high = size >> 32; 115 if (size >= 0x80000000U) { 116 struct m_ext2fs *fs = ip->i_e2fs; 117 118 if (fs->e2fs.e2fs_rev <= E2FS_REV0) { 119 /* Linux automagically upgrades to REV1 here! */ 120 return EFBIG; 121 } 122 if (!EXT2F_HAS_ROCOMPAT_FEATURE(fs, 123 EXT2F_ROCOMPAT_LARGEFILE)) { 124 fs->e2fs.e2fs_features_rocompat |= 125 EXT2F_ROCOMPAT_LARGEFILE; 126 fs->e2fs_fmod = 1; 127 } 128 } 129 } else if (size >= 0x80000000U) 130 return EFBIG; 131 132 ip->i_e2fs_size = size; 133 134 return 0; 135 } 136 137 uint64_t 138 ext2fs_nblock(struct inode *ip) 139 { 140 uint64_t nblock = ip->i_e2fs_nblock; 141 struct m_ext2fs * const fs = ip->i_e2fs; 142 143 if (EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) { 144 nblock |= (uint64_t)ip->i_e2fs_nblock_high << 32; 145 146 if ((ip->i_e2fs_flags & EXT2_HUGE_FILE)) { 147 nblock = EXT2_FSBTODB(fs, nblock); 148 } 149 } 150 151 return nblock; 152 } 153 154 int 155 ext2fs_setnblock(struct inode *ip, uint64_t nblock) 156 { 157 struct m_ext2fs * const fs = ip->i_e2fs; 158 159 if (nblock <= 0xffffffffULL) { 160 CLR(ip->i_e2fs_flags, EXT2_HUGE_FILE); 161 ip->i_e2fs_nblock = nblock; 162 return 0; 163 } 164 165 if (!EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) 166 return EFBIG; 167 168 if (nblock <= 0xffffffffffffULL) { 169 CLR(ip->i_e2fs_flags, EXT2_HUGE_FILE); 170 ip->i_e2fs_nblock = nblock & 0xffffffff; 171 ip->i_e2fs_nblock_high = (nblock >> 32) & 0xffff; 172 return 0; 173 } 174 175 if (EXT2_DBTOFSB(fs, nblock) <= 0xffffffffffffULL) { 176 SET(ip->i_e2fs_flags, EXT2_HUGE_FILE); 177 ip->i_e2fs_nblock = EXT2_DBTOFSB(fs, nblock) & 0xffffffff; 178 ip->i_e2fs_nblock_high = (EXT2_DBTOFSB(fs, nblock) >> 32) & 0xffff; 179 return 0; 180 } 181 182 return EFBIG; 183 } 184 185 /* 186 * Last reference to an inode. If necessary, write or delete it. 187 */ 188 int 189 ext2fs_inactive(void *v) 190 { 191 struct vop_inactive_v2_args /* { 192 struct vnode *a_vp; 193 bool *a_recycle; 194 } */ *ap = v; 195 struct vnode *vp = ap->a_vp; 196 struct inode *ip = VTOI(vp); 197 int error = 0; 198 199 /* Get rid of inodes related to stale file handles. */ 200 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0) 201 goto out; 202 203 error = 0; 204 if (ip->i_e2fs_nlink == 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 205 /* Defer final inode free and update to reclaim.*/ 206 if (ext2fs_size(ip) != 0) { 207 error = ext2fs_truncate(vp, (off_t)0, 0, NOCRED); 208 } 209 ip->i_e2fs_dtime = time_second; 210 ip->i_flag |= IN_CHANGE | IN_UPDATE; 211 ip->i_omode = 1; 212 } 213 if (ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) { 214 ext2fs_update(vp, NULL, NULL, 0); 215 } 216 out: 217 /* 218 * If we are done with the inode, reclaim it 219 * so that it can be reused immediately. 220 */ 221 *ap->a_recycle = (ip->i_e2fs_dtime != 0); 222 223 return error; 224 } 225 226 227 /* 228 * Update the access, modified, and inode change times as specified by the 229 * IACCESS, IUPDATE, and ICHANGE flags respectively. The IMODIFIED flag is 230 * used to specify that the inode needs to be updated but that the times have 231 * already been set. The access and modified times are taken from the second 232 * and third parameters; the inode change time is always taken from the current 233 * time. If UPDATE_WAIT or UPDATE_DIROP is set, then wait for the disk 234 * write of the inode to complete. 235 */ 236 int 237 ext2fs_update(struct vnode *vp, const struct timespec *acc, 238 const struct timespec *mod, int updflags) 239 { 240 struct m_ext2fs *fs; 241 struct buf *bp; 242 struct inode *ip; 243 int error; 244 void *cp; 245 int flags; 246 247 if (vp->v_mount->mnt_flag & MNT_RDONLY) 248 return 0; 249 ip = VTOI(vp); 250 EXT2FS_ITIMES(ip, acc, mod, NULL); 251 if (updflags & UPDATE_CLOSE) 252 flags = ip->i_flag & (IN_MODIFIED | IN_ACCESSED); 253 else 254 flags = ip->i_flag & IN_MODIFIED; 255 if (flags == 0) 256 return 0; 257 fs = ip->i_e2fs; 258 259 error = bread(ip->i_devvp, 260 EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)), 261 (int)fs->e2fs_bsize, B_MODIFY, &bp); 262 if (error) { 263 return error; 264 } 265 ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED); 266 cp = (char *)bp->b_data + 267 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 268 e2fs_isave(ip->i_din.e2fs_din, (struct ext2fs_dinode *)cp, EXT2_DINODE_SIZE(fs)); 269 if ((updflags & (UPDATE_WAIT|UPDATE_DIROP)) != 0 && 270 (flags & IN_MODIFIED) != 0 && 271 (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) 272 return bwrite(bp); 273 else { 274 bdwrite(bp); 275 return 0; 276 } 277 } 278 279 #define SINGLE 0 /* index of single indirect block */ 280 #define DOUBLE 1 /* index of double indirect block */ 281 #define TRIPLE 2 /* index of triple indirect block */ 282 /* 283 * Truncate the inode oip to at most length size, freeing the 284 * disk blocks. 285 */ 286 int 287 ext2fs_truncate(struct vnode *ovp, off_t length, int ioflag, 288 kauth_cred_t cred) 289 { 290 daddr_t lastblock; 291 struct inode *oip = VTOI(ovp); 292 daddr_t bn, lastiblock[EXT2FS_NIADDR], indir_lbn[EXT2FS_NIADDR]; 293 /* XXX ondisk32 */ 294 int32_t oldblks[EXT2FS_NDADDR + EXT2FS_NIADDR], newblks[EXT2FS_NDADDR + EXT2FS_NIADDR]; 295 struct m_ext2fs *fs; 296 int offset, size, level; 297 long count, blocksreleased = 0; 298 int i, nblocks; 299 int error, allerror = 0; 300 off_t osize; 301 int sync; 302 struct ufsmount *ump = oip->i_ump; 303 304 if (ovp->v_type == VCHR || ovp->v_type == VBLK || 305 ovp->v_type == VFIFO || ovp->v_type == VSOCK) { 306 return 0; 307 } 308 309 if (length < 0) 310 return EINVAL; 311 312 if (ovp->v_type == VLNK && 313 (ext2fs_size(oip) < ump->um_maxsymlinklen || 314 (ump->um_maxsymlinklen == 0 && ext2fs_nblock(oip) == 0))) { 315 KDASSERT(length == 0); 316 memset((char *)&oip->i_din.e2fs_din->e2di_shortlink, 0, 317 (u_int)ext2fs_size(oip)); 318 (void)ext2fs_setsize(oip, 0); 319 goto update; 320 } 321 if (ext2fs_size(oip) == length) { 322 /* still do a uvm_vnp_setsize() as writesize may be larger */ 323 uvm_vnp_setsize(ovp, length); 324 goto update; 325 } 326 fs = oip->i_e2fs; 327 if (length > ump->um_maxfilesize) 328 return EFBIG; 329 330 osize = ext2fs_size(oip); 331 332 /* 333 * Lengthen the size of the file. We must ensure that the 334 * last byte of the file is allocated. Since the smallest 335 * value of osize is 0, length will be at least 1. 336 */ 337 if (osize < length) { 338 uvm_vnp_setwritesize(ovp, length); 339 error = ufs_balloc_range(ovp, length - 1, 1, cred, 340 ioflag & IO_SYNC ? B_SYNC : 0); 341 if (error) { 342 (void) ext2fs_truncate(ovp, osize, ioflag & IO_SYNC, 343 cred); 344 return error; 345 } 346 uvm_vnp_setsize(ovp, length); 347 KASSERT(error || ovp->v_size == ext2fs_size(oip)); 348 goto update; 349 } 350 /* 351 * Shorten the size of the file. If the file is not being 352 * truncated to a block boundry, the contents of the 353 * partial block following the end of the file must be 354 * zero'ed in case it ever become accessible again because 355 * of subsequent file growth. 356 */ 357 offset = ext2_blkoff(fs, length); 358 if (offset != 0) { 359 size = fs->e2fs_bsize; 360 361 /* XXXUBC we should handle more than just VREG */ 362 ubc_zerorange(&ovp->v_uobj, length, size - offset, 363 UBC_VNODE_FLAGS(ovp)); 364 } 365 (void)ext2fs_setsize(oip, length); 366 uvm_vnp_setsize(ovp, length); 367 /* 368 * Calculate index into inode's block list of 369 * last direct and indirect blocks (if any) 370 * which we want to keep. Lastblock is -1 when 371 * the file is truncated to 0. 372 */ 373 lastblock = ext2_lblkno(fs, length + fs->e2fs_bsize - 1) - 1; 374 lastiblock[SINGLE] = lastblock - EXT2FS_NDADDR; 375 lastiblock[DOUBLE] = lastiblock[SINGLE] - EXT2_NINDIR(fs); 376 lastiblock[TRIPLE] = lastiblock[DOUBLE] - EXT2_NINDIR(fs) * EXT2_NINDIR(fs); 377 nblocks = btodb(fs->e2fs_bsize); 378 /* 379 * Update file and block pointers on disk before we start freeing 380 * blocks. If we crash before free'ing blocks below, the blocks 381 * will be returned to the free list. lastiblock values are also 382 * normalized to -1 for calls to ext2fs_indirtrunc below. 383 */ 384 memcpy((void *)oldblks, (void *)&oip->i_e2fs_blocks[0], sizeof oldblks); 385 sync = 0; 386 for (level = TRIPLE; level >= SINGLE; level--) { 387 if (lastiblock[level] < 0 && oldblks[EXT2FS_NDADDR + level] != 0) { 388 sync = 1; 389 oip->i_e2fs_blocks[EXT2FS_NDADDR + level] = 0; 390 lastiblock[level] = -1; 391 } 392 } 393 for (i = 0; i < EXT2FS_NDADDR; i++) { 394 if (i > lastblock && oldblks[i] != 0) { 395 sync = 1; 396 oip->i_e2fs_blocks[i] = 0; 397 } 398 } 399 oip->i_flag |= IN_CHANGE | IN_UPDATE; 400 if (sync) { 401 error = ext2fs_update(ovp, NULL, NULL, UPDATE_WAIT); 402 if (error && !allerror) 403 allerror = error; 404 } 405 406 /* 407 * Having written the new inode to disk, save its new configuration 408 * and put back the old block pointers long enough to process them. 409 * Note that we save the new block configuration so we can check it 410 * when we are done. 411 */ 412 memcpy((void *)newblks, (void *)&oip->i_e2fs_blocks[0], sizeof newblks); 413 memcpy((void *)&oip->i_e2fs_blocks[0], (void *)oldblks, sizeof oldblks); 414 415 (void)ext2fs_setsize(oip, osize); 416 error = vtruncbuf(ovp, lastblock + 1, 0, 0); 417 if (error && !allerror) 418 allerror = error; 419 420 /* 421 * Indirect blocks first. 422 */ 423 indir_lbn[SINGLE] = -EXT2FS_NDADDR; 424 indir_lbn[DOUBLE] = indir_lbn[SINGLE] - EXT2_NINDIR(fs) -1; 425 indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - EXT2_NINDIR(fs) * EXT2_NINDIR(fs) - 1; 426 for (level = TRIPLE; level >= SINGLE; level--) { 427 /* XXX ondisk32 */ 428 bn = fs2h32(oip->i_e2fs_blocks[EXT2FS_NDADDR + level]); 429 if (bn != 0) { 430 error = ext2fs_indirtrunc(oip, indir_lbn[level], 431 EXT2_FSBTODB(fs, bn), lastiblock[level], level, &count); 432 if (error) 433 allerror = error; 434 blocksreleased += count; 435 if (lastiblock[level] < 0) { 436 oip->i_e2fs_blocks[EXT2FS_NDADDR + level] = 0; 437 ext2fs_blkfree(oip, bn); 438 blocksreleased += nblocks; 439 } 440 } 441 if (lastiblock[level] >= 0) 442 goto done; 443 } 444 445 /* 446 * All whole direct blocks or frags. 447 */ 448 for (i = EXT2FS_NDADDR - 1; i > lastblock; i--) { 449 /* XXX ondisk32 */ 450 bn = fs2h32(oip->i_e2fs_blocks[i]); 451 if (bn == 0) 452 continue; 453 oip->i_e2fs_blocks[i] = 0; 454 ext2fs_blkfree(oip, bn); 455 blocksreleased += btodb(fs->e2fs_bsize); 456 } 457 458 done: 459 #ifdef DIAGNOSTIC 460 for (level = SINGLE; level <= TRIPLE; level++) 461 if (newblks[EXT2FS_NDADDR + level] != 462 oip->i_e2fs_blocks[EXT2FS_NDADDR + level]) 463 panic("ext2fs_truncate1"); 464 for (i = 0; i < EXT2FS_NDADDR; i++) 465 if (newblks[i] != oip->i_e2fs_blocks[i]) 466 panic("ext2fs_truncate2"); 467 if (length == 0 && 468 (!LIST_EMPTY(&ovp->v_cleanblkhd) || 469 !LIST_EMPTY(&ovp->v_dirtyblkhd))) 470 panic("ext2fs_truncate3"); 471 #endif /* DIAGNOSTIC */ 472 /* 473 * Put back the real size. 474 */ 475 (void)ext2fs_setsize(oip, length); 476 error = ext2fs_setnblock(oip, ext2fs_nblock(oip) - blocksreleased); 477 if (error != 0) 478 allerror = error; 479 oip->i_flag |= IN_CHANGE; 480 KASSERT(ovp->v_type != VREG || ovp->v_size == ext2fs_size(oip)); 481 return allerror; 482 update: 483 oip->i_flag |= IN_CHANGE | IN_UPDATE; 484 return ext2fs_update(ovp, NULL, NULL, 0); 485 } 486 487 /* 488 * Release blocks associated with the inode ip and stored in the indirect 489 * block bn. Blocks are free'd in LIFO order up to (but not including) 490 * lastbn. If level is greater than SINGLE, the block is an indirect block 491 * and recursive calls to indirtrunc must be used to cleanse other indirect 492 * blocks. 493 * 494 * NB: triple indirect blocks are untested. 495 */ 496 static int 497 ext2fs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn, 498 int level, long *countp) 499 { 500 int i; 501 struct buf *bp; 502 struct m_ext2fs *fs = ip->i_e2fs; 503 int32_t *bap; /* XXX ondisk32 */ 504 struct vnode *vp; 505 daddr_t nb, nlbn, last; 506 int32_t *copy = NULL; /* XXX ondisk32 */ 507 long blkcount, factor; 508 int nblocks, blocksreleased = 0; 509 int error = 0, allerror = 0; 510 511 /* 512 * Calculate index in current block of last 513 * block to be kept. -1 indicates the entire 514 * block so we need not calculate the index. 515 */ 516 factor = 1; 517 for (i = SINGLE; i < level; i++) 518 factor *= EXT2_NINDIR(fs); 519 last = lastbn; 520 if (lastbn > 0) 521 last /= factor; 522 nblocks = btodb(fs->e2fs_bsize); 523 /* 524 * Get buffer of block pointers, zero those entries corresponding 525 * to blocks to be free'd, and update on disk copy first. Since 526 * double(triple) indirect before single(double) indirect, calls 527 * to bmap on these blocks will fail. However, we already have 528 * the on disk address, so we have to set the b_blkno field 529 * explicitly instead of letting bread do everything for us. 530 */ 531 vp = ITOV(ip); 532 bp = getblk(vp, lbn, (int)fs->e2fs_bsize, 0, 0); 533 if (bp->b_oflags & (BO_DONE | BO_DELWRI)) { 534 /* Braces must be here in case trace evaluates to nothing. */ 535 trace(TR_BREADHIT, pack(vp, fs->e2fs_bsize), lbn); 536 } else { 537 trace(TR_BREADMISS, pack(vp, fs->e2fs_bsize), lbn); 538 curlwp->l_ru.ru_inblock++; /* pay for read */ 539 bp->b_flags |= B_READ; 540 if (bp->b_bcount > bp->b_bufsize) 541 panic("ext2fs_indirtrunc: bad buffer size"); 542 bp->b_blkno = dbn; 543 VOP_STRATEGY(vp, bp); 544 error = biowait(bp); 545 } 546 if (error) { 547 brelse(bp, 0); 548 *countp = 0; 549 return error; 550 } 551 552 bap = (int32_t *)bp->b_data; /* XXX ondisk32 */ 553 if (lastbn >= 0) { 554 /* XXX ondisk32 */ 555 copy = kmem_alloc(fs->e2fs_bsize, KM_SLEEP); 556 memcpy((void *)copy, (void *)bap, (u_int)fs->e2fs_bsize); 557 memset((void *)&bap[last + 1], 0, 558 (u_int)(EXT2_NINDIR(fs) - (last + 1)) * sizeof (uint32_t)); 559 error = bwrite(bp); 560 if (error) 561 allerror = error; 562 bap = copy; 563 } 564 565 /* 566 * Recursively free totally unused blocks. 567 */ 568 for (i = EXT2_NINDIR(fs) - 1, 569 nlbn = lbn + 1 - i * factor; i > last; 570 i--, nlbn += factor) { 571 /* XXX ondisk32 */ 572 nb = fs2h32(bap[i]); 573 if (nb == 0) 574 continue; 575 if (level > SINGLE) { 576 error = ext2fs_indirtrunc(ip, nlbn, EXT2_FSBTODB(fs, nb), 577 (daddr_t)-1, level - 1, 578 &blkcount); 579 if (error) 580 allerror = error; 581 blocksreleased += blkcount; 582 } 583 ext2fs_blkfree(ip, nb); 584 blocksreleased += nblocks; 585 } 586 587 /* 588 * Recursively free last partial block. 589 */ 590 if (level > SINGLE && lastbn >= 0) { 591 last = lastbn % factor; 592 /* XXX ondisk32 */ 593 nb = fs2h32(bap[i]); 594 if (nb != 0) { 595 error = ext2fs_indirtrunc(ip, nlbn, EXT2_FSBTODB(fs, nb), 596 last, level - 1, &blkcount); 597 if (error) 598 allerror = error; 599 blocksreleased += blkcount; 600 } 601 } 602 603 if (copy != NULL) { 604 kmem_free(copy, fs->e2fs_bsize); 605 } else { 606 brelse(bp, BC_INVAL); 607 } 608 609 *countp = blocksreleased; 610 return allerror; 611 } 612