1 /* $NetBSD: ext2fs_inode.c,v 1.86 2016/08/14 11:44:54 jdolecek 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 1.86 2016/08/14 11:44:54 jdolecek 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 extern int prtactive; 86 87 static int ext2fs_indirtrunc(struct inode *, daddr_t, daddr_t, 88 daddr_t, int, long *); 89 90 /* 91 * These are fortunately the same values; it is likely that there is 92 * code that assumes they're equal. In any event, neither ought to 93 * ever change because it's a property of the on-disk formats. 94 */ 95 CTASSERT(EXT2FS_NDADDR == UFS_NDADDR); 96 CTASSERT(EXT2FS_NIADDR == UFS_NIADDR); 97 98 /* 99 * Get the size of an inode. 100 */ 101 uint64_t 102 ext2fs_size(struct inode *ip) 103 { 104 uint64_t size = ip->i_e2fs_size; 105 106 if ((ip->i_e2fs_mode & IFMT) == IFREG) 107 size |= (uint64_t)ip->i_din.e2fs_din->e2di_size_high << 32; 108 return size; 109 } 110 111 int 112 ext2fs_setsize(struct inode *ip, uint64_t size) 113 { 114 if ((ip->i_e2fs_mode & IFMT) == IFREG || 115 ip->i_e2fs_mode == 0) { 116 ip->i_din.e2fs_din->e2di_size_high = size >> 32; 117 if (size >= 0x80000000U) { 118 struct m_ext2fs *fs = ip->i_e2fs; 119 120 if (fs->e2fs.e2fs_rev <= E2FS_REV0) { 121 /* Linux automagically upgrades to REV1 here! */ 122 return EFBIG; 123 } 124 if (!EXT2F_HAS_ROCOMPAT_FEATURE(fs, 125 EXT2F_ROCOMPAT_LARGEFILE)) { 126 fs->e2fs.e2fs_features_rocompat |= 127 EXT2F_ROCOMPAT_LARGEFILE; 128 fs->e2fs_fmod = 1; 129 } 130 } 131 } else if (size >= 0x80000000U) 132 return EFBIG; 133 134 ip->i_e2fs_size = size; 135 136 return 0; 137 } 138 139 uint64_t 140 ext2fs_nblock(struct inode *ip) 141 { 142 uint64_t nblock = ip->i_e2fs_nblock; 143 struct m_ext2fs * const fs = ip->i_e2fs; 144 145 if (EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) { 146 nblock |= (uint64_t)ip->i_e2fs_nblock_high << 32; 147 148 if ((ip->i_e2fs_flags & EXT2_HUGE_FILE)) { 149 nblock = EXT2_FSBTODB(fs, nblock); 150 } 151 } 152 153 return nblock; 154 } 155 156 int 157 ext2fs_setnblock(struct inode *ip, uint64_t nblock) 158 { 159 struct m_ext2fs * const fs = ip->i_e2fs; 160 161 if (nblock <= 0xffffffffULL) { 162 CLR(ip->i_e2fs_flags, EXT2_HUGE_FILE); 163 ip->i_e2fs_nblock = nblock; 164 return 0; 165 } 166 167 if (!EXT2F_HAS_ROCOMPAT_FEATURE(fs, EXT2F_ROCOMPAT_HUGE_FILE)) 168 return EFBIG; 169 170 if (nblock <= 0xffffffffffffULL) { 171 CLR(ip->i_e2fs_flags, EXT2_HUGE_FILE); 172 ip->i_e2fs_nblock = nblock & 0xffffffff; 173 ip->i_e2fs_nblock_high = (nblock >> 32) & 0xffff; 174 return 0; 175 } 176 177 if (EXT2_DBTOFSB(fs, nblock) <= 0xffffffffffffULL) { 178 SET(ip->i_e2fs_flags, EXT2_HUGE_FILE); 179 ip->i_e2fs_nblock = EXT2_DBTOFSB(fs, nblock) & 0xffffffff; 180 ip->i_e2fs_nblock_high = (EXT2_DBTOFSB(fs, nblock) >> 32) & 0xffff; 181 return 0; 182 } 183 184 return EFBIG; 185 } 186 187 /* 188 * Last reference to an inode. If necessary, write or delete it. 189 */ 190 int 191 ext2fs_inactive(void *v) 192 { 193 struct vop_inactive_args /* { 194 struct vnode *a_vp; 195 bool *a_recycle; 196 } */ *ap = v; 197 struct vnode *vp = ap->a_vp; 198 struct inode *ip = VTOI(vp); 199 int error = 0; 200 201 if (prtactive && vp->v_usecount != 0) 202 vprint("ext2fs_inactive: pushing active", vp); 203 /* Get rid of inodes related to stale file handles. */ 204 if (ip->i_e2fs_mode == 0 || ip->i_e2fs_dtime != 0) 205 goto out; 206 207 error = 0; 208 if (ip->i_e2fs_nlink == 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 209 /* Defer final inode free and update to reclaim.*/ 210 if (ext2fs_size(ip) != 0) { 211 error = ext2fs_truncate(vp, (off_t)0, 0, NOCRED); 212 } 213 ip->i_e2fs_dtime = time_second; 214 ip->i_flag |= IN_CHANGE | IN_UPDATE; 215 ip->i_omode = 1; 216 } 217 if (ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) { 218 ext2fs_update(vp, NULL, NULL, 0); 219 } 220 out: 221 /* 222 * If we are done with the inode, reclaim it 223 * so that it can be reused immediately. 224 */ 225 *ap->a_recycle = (ip->i_e2fs_dtime != 0); 226 VOP_UNLOCK(vp); 227 return error; 228 } 229 230 231 /* 232 * Update the access, modified, and inode change times as specified by the 233 * IACCESS, IUPDATE, and ICHANGE flags respectively. The IMODIFIED flag is 234 * used to specify that the inode needs to be updated but that the times have 235 * already been set. The access and modified times are taken from the second 236 * and third parameters; the inode change time is always taken from the current 237 * time. If UPDATE_WAIT or UPDATE_DIROP is set, then wait for the disk 238 * write of the inode to complete. 239 */ 240 int 241 ext2fs_update(struct vnode *vp, const struct timespec *acc, 242 const struct timespec *mod, int updflags) 243 { 244 struct m_ext2fs *fs; 245 struct buf *bp; 246 struct inode *ip; 247 int error; 248 void *cp; 249 int flags; 250 251 if (vp->v_mount->mnt_flag & MNT_RDONLY) 252 return 0; 253 ip = VTOI(vp); 254 EXT2FS_ITIMES(ip, acc, mod, NULL); 255 if (updflags & UPDATE_CLOSE) 256 flags = ip->i_flag & (IN_MODIFIED | IN_ACCESSED); 257 else 258 flags = ip->i_flag & IN_MODIFIED; 259 if (flags == 0) 260 return 0; 261 fs = ip->i_e2fs; 262 263 error = bread(ip->i_devvp, 264 EXT2_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)), 265 (int)fs->e2fs_bsize, B_MODIFY, &bp); 266 if (error) { 267 return error; 268 } 269 ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED); 270 cp = (char *)bp->b_data + 271 (ino_to_fsbo(fs, ip->i_number) * EXT2_DINODE_SIZE(fs)); 272 e2fs_isave(ip->i_din.e2fs_din, (struct ext2fs_dinode *)cp, EXT2_DINODE_SIZE(fs)); 273 if ((updflags & (UPDATE_WAIT|UPDATE_DIROP)) != 0 && 274 (flags & IN_MODIFIED) != 0 && 275 (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) 276 return bwrite(bp); 277 else { 278 bdwrite(bp); 279 return 0; 280 } 281 } 282 283 #define SINGLE 0 /* index of single indirect block */ 284 #define DOUBLE 1 /* index of double indirect block */ 285 #define TRIPLE 2 /* index of triple indirect block */ 286 /* 287 * Truncate the inode oip to at most length size, freeing the 288 * disk blocks. 289 */ 290 int 291 ext2fs_truncate(struct vnode *ovp, off_t length, int ioflag, 292 kauth_cred_t cred) 293 { 294 daddr_t lastblock; 295 struct inode *oip = VTOI(ovp); 296 daddr_t bn, lastiblock[EXT2FS_NIADDR], indir_lbn[EXT2FS_NIADDR]; 297 /* XXX ondisk32 */ 298 int32_t oldblks[EXT2FS_NDADDR + EXT2FS_NIADDR], newblks[EXT2FS_NDADDR + EXT2FS_NIADDR]; 299 struct m_ext2fs *fs; 300 int offset, size, level; 301 long count, blocksreleased = 0; 302 int i, nblocks; 303 int error, allerror = 0; 304 off_t osize; 305 int sync; 306 struct ufsmount *ump = oip->i_ump; 307 308 if (ovp->v_type == VCHR || ovp->v_type == VBLK || 309 ovp->v_type == VFIFO || ovp->v_type == VSOCK) { 310 return 0; 311 } 312 313 if (length < 0) 314 return EINVAL; 315 316 if (ovp->v_type == VLNK && 317 (ext2fs_size(oip) < ump->um_maxsymlinklen || 318 (ump->um_maxsymlinklen == 0 && ext2fs_nblock(oip) == 0))) { 319 KDASSERT(length == 0); 320 memset((char *)&oip->i_din.e2fs_din->e2di_shortlink, 0, 321 (u_int)ext2fs_size(oip)); 322 (void)ext2fs_setsize(oip, 0); 323 goto update; 324 } 325 if (ext2fs_size(oip) == length) { 326 /* still do a uvm_vnp_setsize() as writesize may be larger */ 327 uvm_vnp_setsize(ovp, length); 328 goto update; 329 } 330 fs = oip->i_e2fs; 331 if (length > ump->um_maxfilesize) 332 return EFBIG; 333 334 osize = ext2fs_size(oip); 335 336 /* 337 * Lengthen the size of the file. We must ensure that the 338 * last byte of the file is allocated. Since the smallest 339 * value of osize is 0, length will be at least 1. 340 */ 341 if (osize < length) { 342 uvm_vnp_setwritesize(ovp, length); 343 error = ufs_balloc_range(ovp, length - 1, 1, cred, 344 ioflag & IO_SYNC ? B_SYNC : 0); 345 if (error) { 346 (void) ext2fs_truncate(ovp, osize, ioflag & IO_SYNC, 347 cred); 348 return error; 349 } 350 uvm_vnp_setsize(ovp, length); 351 KASSERT(error || ovp->v_size == ext2fs_size(oip)); 352 goto update; 353 } 354 /* 355 * Shorten the size of the file. If the file is not being 356 * truncated to a block boundry, the contents of the 357 * partial block following the end of the file must be 358 * zero'ed in case it ever become accessible again because 359 * of subsequent file growth. 360 */ 361 offset = ext2_blkoff(fs, length); 362 if (offset != 0) { 363 size = fs->e2fs_bsize; 364 365 /* XXXUBC we should handle more than just VREG */ 366 ubc_zerorange(&ovp->v_uobj, length, size - offset, 367 UBC_UNMAP_FLAG(ovp)); 368 } 369 (void)ext2fs_setsize(oip, length); 370 uvm_vnp_setsize(ovp, length); 371 /* 372 * Calculate index into inode's block list of 373 * last direct and indirect blocks (if any) 374 * which we want to keep. Lastblock is -1 when 375 * the file is truncated to 0. 376 */ 377 lastblock = ext2_lblkno(fs, length + fs->e2fs_bsize - 1) - 1; 378 lastiblock[SINGLE] = lastblock - EXT2FS_NDADDR; 379 lastiblock[DOUBLE] = lastiblock[SINGLE] - EXT2_NINDIR(fs); 380 lastiblock[TRIPLE] = lastiblock[DOUBLE] - EXT2_NINDIR(fs) * EXT2_NINDIR(fs); 381 nblocks = btodb(fs->e2fs_bsize); 382 /* 383 * Update file and block pointers on disk before we start freeing 384 * blocks. If we crash before free'ing blocks below, the blocks 385 * will be returned to the free list. lastiblock values are also 386 * normalized to -1 for calls to ext2fs_indirtrunc below. 387 */ 388 memcpy((void *)oldblks, (void *)&oip->i_e2fs_blocks[0], sizeof oldblks); 389 sync = 0; 390 for (level = TRIPLE; level >= SINGLE; level--) { 391 if (lastiblock[level] < 0 && oldblks[EXT2FS_NDADDR + level] != 0) { 392 sync = 1; 393 oip->i_e2fs_blocks[EXT2FS_NDADDR + level] = 0; 394 lastiblock[level] = -1; 395 } 396 } 397 for (i = 0; i < EXT2FS_NDADDR; i++) { 398 if (i > lastblock && oldblks[i] != 0) { 399 sync = 1; 400 oip->i_e2fs_blocks[i] = 0; 401 } 402 } 403 oip->i_flag |= IN_CHANGE | IN_UPDATE; 404 if (sync) { 405 error = ext2fs_update(ovp, NULL, NULL, UPDATE_WAIT); 406 if (error && !allerror) 407 allerror = error; 408 } 409 410 /* 411 * Having written the new inode to disk, save its new configuration 412 * and put back the old block pointers long enough to process them. 413 * Note that we save the new block configuration so we can check it 414 * when we are done. 415 */ 416 memcpy((void *)newblks, (void *)&oip->i_e2fs_blocks[0], sizeof newblks); 417 memcpy((void *)&oip->i_e2fs_blocks[0], (void *)oldblks, sizeof oldblks); 418 419 (void)ext2fs_setsize(oip, osize); 420 error = vtruncbuf(ovp, lastblock + 1, 0, 0); 421 if (error && !allerror) 422 allerror = error; 423 424 /* 425 * Indirect blocks first. 426 */ 427 indir_lbn[SINGLE] = -EXT2FS_NDADDR; 428 indir_lbn[DOUBLE] = indir_lbn[SINGLE] - EXT2_NINDIR(fs) -1; 429 indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - EXT2_NINDIR(fs) * EXT2_NINDIR(fs) - 1; 430 for (level = TRIPLE; level >= SINGLE; level--) { 431 /* XXX ondisk32 */ 432 bn = fs2h32(oip->i_e2fs_blocks[EXT2FS_NDADDR + level]); 433 if (bn != 0) { 434 error = ext2fs_indirtrunc(oip, indir_lbn[level], 435 EXT2_FSBTODB(fs, bn), lastiblock[level], level, &count); 436 if (error) 437 allerror = error; 438 blocksreleased += count; 439 if (lastiblock[level] < 0) { 440 oip->i_e2fs_blocks[EXT2FS_NDADDR + level] = 0; 441 ext2fs_blkfree(oip, bn); 442 blocksreleased += nblocks; 443 } 444 } 445 if (lastiblock[level] >= 0) 446 goto done; 447 } 448 449 /* 450 * All whole direct blocks or frags. 451 */ 452 for (i = EXT2FS_NDADDR - 1; i > lastblock; i--) { 453 /* XXX ondisk32 */ 454 bn = fs2h32(oip->i_e2fs_blocks[i]); 455 if (bn == 0) 456 continue; 457 oip->i_e2fs_blocks[i] = 0; 458 ext2fs_blkfree(oip, bn); 459 blocksreleased += btodb(fs->e2fs_bsize); 460 } 461 462 done: 463 #ifdef DIAGNOSTIC 464 for (level = SINGLE; level <= TRIPLE; level++) 465 if (newblks[EXT2FS_NDADDR + level] != 466 oip->i_e2fs_blocks[EXT2FS_NDADDR + level]) 467 panic("ext2fs_truncate1"); 468 for (i = 0; i < EXT2FS_NDADDR; i++) 469 if (newblks[i] != oip->i_e2fs_blocks[i]) 470 panic("ext2fs_truncate2"); 471 if (length == 0 && 472 (!LIST_EMPTY(&ovp->v_cleanblkhd) || 473 !LIST_EMPTY(&ovp->v_dirtyblkhd))) 474 panic("ext2fs_truncate3"); 475 #endif /* DIAGNOSTIC */ 476 /* 477 * Put back the real size. 478 */ 479 (void)ext2fs_setsize(oip, length); 480 error = ext2fs_setnblock(oip, ext2fs_nblock(oip) - blocksreleased); 481 if (error != 0) 482 allerror = error; 483 oip->i_flag |= IN_CHANGE; 484 KASSERT(ovp->v_type != VREG || ovp->v_size == ext2fs_size(oip)); 485 return allerror; 486 update: 487 oip->i_flag |= IN_CHANGE | IN_UPDATE; 488 return ext2fs_update(ovp, NULL, NULL, 0); 489 } 490 491 /* 492 * Release blocks associated with the inode ip and stored in the indirect 493 * block bn. Blocks are free'd in LIFO order up to (but not including) 494 * lastbn. If level is greater than SINGLE, the block is an indirect block 495 * and recursive calls to indirtrunc must be used to cleanse other indirect 496 * blocks. 497 * 498 * NB: triple indirect blocks are untested. 499 */ 500 static int 501 ext2fs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn, 502 int level, long *countp) 503 { 504 int i; 505 struct buf *bp; 506 struct m_ext2fs *fs = ip->i_e2fs; 507 int32_t *bap; /* XXX ondisk32 */ 508 struct vnode *vp; 509 daddr_t nb, nlbn, last; 510 int32_t *copy = NULL; /* XXX ondisk32 */ 511 long blkcount, factor; 512 int nblocks, blocksreleased = 0; 513 int error = 0, allerror = 0; 514 515 /* 516 * Calculate index in current block of last 517 * block to be kept. -1 indicates the entire 518 * block so we need not calculate the index. 519 */ 520 factor = 1; 521 for (i = SINGLE; i < level; i++) 522 factor *= EXT2_NINDIR(fs); 523 last = lastbn; 524 if (lastbn > 0) 525 last /= factor; 526 nblocks = btodb(fs->e2fs_bsize); 527 /* 528 * Get buffer of block pointers, zero those entries corresponding 529 * to blocks to be free'd, and update on disk copy first. Since 530 * double(triple) indirect before single(double) indirect, calls 531 * to bmap on these blocks will fail. However, we already have 532 * the on disk address, so we have to set the b_blkno field 533 * explicitly instead of letting bread do everything for us. 534 */ 535 vp = ITOV(ip); 536 bp = getblk(vp, lbn, (int)fs->e2fs_bsize, 0, 0); 537 if (bp->b_oflags & (BO_DONE | BO_DELWRI)) { 538 /* Braces must be here in case trace evaluates to nothing. */ 539 trace(TR_BREADHIT, pack(vp, fs->e2fs_bsize), lbn); 540 } else { 541 trace(TR_BREADMISS, pack(vp, fs->e2fs_bsize), lbn); 542 curlwp->l_ru.ru_inblock++; /* pay for read */ 543 bp->b_flags |= B_READ; 544 if (bp->b_bcount > bp->b_bufsize) 545 panic("ext2fs_indirtrunc: bad buffer size"); 546 bp->b_blkno = dbn; 547 VOP_STRATEGY(vp, bp); 548 error = biowait(bp); 549 } 550 if (error) { 551 brelse(bp, 0); 552 *countp = 0; 553 return error; 554 } 555 556 bap = (int32_t *)bp->b_data; /* XXX ondisk32 */ 557 if (lastbn >= 0) { 558 /* XXX ondisk32 */ 559 copy = kmem_alloc(fs->e2fs_bsize, KM_SLEEP); 560 memcpy((void *)copy, (void *)bap, (u_int)fs->e2fs_bsize); 561 memset((void *)&bap[last + 1], 0, 562 (u_int)(EXT2_NINDIR(fs) - (last + 1)) * sizeof (uint32_t)); 563 error = bwrite(bp); 564 if (error) 565 allerror = error; 566 bap = copy; 567 } 568 569 /* 570 * Recursively free totally unused blocks. 571 */ 572 for (i = EXT2_NINDIR(fs) - 1, 573 nlbn = lbn + 1 - i * factor; i > last; 574 i--, nlbn += factor) { 575 /* XXX ondisk32 */ 576 nb = fs2h32(bap[i]); 577 if (nb == 0) 578 continue; 579 if (level > SINGLE) { 580 error = ext2fs_indirtrunc(ip, nlbn, EXT2_FSBTODB(fs, nb), 581 (daddr_t)-1, level - 1, 582 &blkcount); 583 if (error) 584 allerror = error; 585 blocksreleased += blkcount; 586 } 587 ext2fs_blkfree(ip, nb); 588 blocksreleased += nblocks; 589 } 590 591 /* 592 * Recursively free last partial block. 593 */ 594 if (level > SINGLE && lastbn >= 0) { 595 last = lastbn % factor; 596 /* XXX ondisk32 */ 597 nb = fs2h32(bap[i]); 598 if (nb != 0) { 599 error = ext2fs_indirtrunc(ip, nlbn, EXT2_FSBTODB(fs, nb), 600 last, level - 1, &blkcount); 601 if (error) 602 allerror = error; 603 blocksreleased += blkcount; 604 } 605 } 606 607 if (copy != NULL) { 608 kmem_free(copy, fs->e2fs_bsize); 609 } else { 610 brelse(bp, BC_INVAL); 611 } 612 613 *countp = blocksreleased; 614 return allerror; 615 } 616