1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 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 32 #include <sys/param.h> 33 #include <sys/stat.h> 34 #include <sys/stdint.h> 35 #include <sys/sysctl.h> 36 37 #include <ufs/ufs/dinode.h> 38 #include <ufs/ufs/dir.h> 39 #include <ufs/ffs/fs.h> 40 41 #include <err.h> 42 #include <pwd.h> 43 #include <string.h> 44 #include <time.h> 45 46 #include "fsck.h" 47 48 struct bufarea *icachebp; /* inode cache buffer */ 49 static time_t now; /* current time of day */ 50 51 static int iblock(struct inodesc *, off_t isize, int type); 52 static ufs2_daddr_t indir_blkatoff(ufs2_daddr_t, ino_t, ufs_lbn_t, ufs_lbn_t, 53 struct bufarea **); 54 static int snapclean(struct inodesc *idesc); 55 static void chkcopyonwrite(struct fs *, ufs2_daddr_t, 56 ufs2_daddr_t (*checkblkavail)(ufs2_daddr_t, long)); 57 58 int 59 ckinode(union dinode *dp, struct inodesc *idesc) 60 { 61 off_t remsize, sizepb; 62 int i, offset, ret; 63 struct inode ip; 64 union dinode dino; 65 ufs2_daddr_t ndb; 66 mode_t mode; 67 char pathbuf[MAXPATHLEN + 1]; 68 69 if (idesc->id_fix != IGNORE) 70 idesc->id_fix = DONTKNOW; 71 idesc->id_dp = dp; 72 idesc->id_lbn = -1; 73 idesc->id_lballoc = -1; 74 idesc->id_level = 0; 75 idesc->id_entryno = 0; 76 idesc->id_filesize = DIP(dp, di_size); 77 mode = DIP(dp, di_mode) & IFMT; 78 if (mode == IFBLK || mode == IFCHR || (mode == IFLNK && 79 DIP(dp, di_size) < (unsigned)sblock.fs_maxsymlinklen)) 80 return (KEEPON); 81 if (sblock.fs_magic == FS_UFS1_MAGIC) 82 dino.dp1 = dp->dp1; 83 else 84 dino.dp2 = dp->dp2; 85 if (DIP(&dino, di_size) < 0) { 86 pfatal("NEGATIVE INODE SIZE %jd\n", DIP(&dino, di_size)); 87 return (STOP); 88 } 89 ndb = howmany(DIP(&dino, di_size), sblock.fs_bsize); 90 for (i = 0; i < UFS_NDADDR; i++) { 91 idesc->id_lbn++; 92 if (--ndb == 0 && 93 (offset = blkoff(&sblock, DIP(&dino, di_size))) != 0) 94 idesc->id_numfrags = 95 numfrags(&sblock, fragroundup(&sblock, offset)); 96 else 97 idesc->id_numfrags = sblock.fs_frag; 98 if (DIP(&dino, di_db[i]) == 0) { 99 if (idesc->id_type == DATA && ndb >= 0) { 100 /* An empty block in a directory XXX */ 101 getpathname(pathbuf, idesc->id_number, 102 idesc->id_number); 103 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 104 pathbuf); 105 if (reply("ADJUST LENGTH") == 1) { 106 ginode(idesc->id_number, &ip); 107 DIP_SET(ip.i_dp, di_size, 108 i * sblock.fs_bsize); 109 printf( 110 "YOU MUST RERUN FSCK AFTERWARDS\n"); 111 rerun = 1; 112 inodirty(&ip); 113 irelse(&ip); 114 } 115 return (STOP); 116 } 117 continue; 118 } 119 idesc->id_blkno = DIP(&dino, di_db[i]); 120 if (idesc->id_type != DATA) 121 ret = (*idesc->id_func)(idesc); 122 else 123 ret = dirscan(idesc); 124 if (ret & STOP) 125 return (ret); 126 } 127 idesc->id_numfrags = sblock.fs_frag; 128 remsize = DIP(&dino, di_size) - sblock.fs_bsize * UFS_NDADDR; 129 sizepb = sblock.fs_bsize; 130 for (i = 0; i < UFS_NIADDR; i++) { 131 sizepb *= NINDIR(&sblock); 132 idesc->id_level = i + 1; 133 if (DIP(&dino, di_ib[i])) { 134 idesc->id_blkno = DIP(&dino, di_ib[i]); 135 ret = iblock(idesc, remsize, BT_LEVEL1 + i); 136 if (ret & STOP) 137 return (ret); 138 } else if (remsize > 0) { 139 idesc->id_lbn += sizepb / sblock.fs_bsize; 140 if (idesc->id_type == DATA) { 141 /* An empty block in a directory XXX */ 142 getpathname(pathbuf, idesc->id_number, 143 idesc->id_number); 144 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 145 pathbuf); 146 if (reply("ADJUST LENGTH") == 1) { 147 ginode(idesc->id_number, &ip); 148 DIP_SET(ip.i_dp, di_size, 149 DIP(ip.i_dp, di_size) - remsize); 150 remsize = 0; 151 printf( 152 "YOU MUST RERUN FSCK AFTERWARDS\n"); 153 rerun = 1; 154 inodirty(&ip); 155 irelse(&ip); 156 break; 157 } 158 } 159 } 160 remsize -= sizepb; 161 } 162 return (KEEPON); 163 } 164 165 static int 166 iblock(struct inodesc *idesc, off_t isize, int type) 167 { 168 struct inode ip; 169 struct bufarea *bp; 170 int i, n, (*func)(struct inodesc *), nif; 171 off_t sizepb; 172 char buf[BUFSIZ]; 173 char pathbuf[MAXPATHLEN + 1]; 174 175 if (idesc->id_type != DATA) { 176 func = idesc->id_func; 177 if (((n = (*func)(idesc)) & KEEPON) == 0) 178 return (n); 179 } else 180 func = dirscan; 181 bp = getdatablk(idesc->id_blkno, sblock.fs_bsize, type); 182 if (bp->b_errs != 0) { 183 brelse(bp); 184 return (SKIP); 185 } 186 idesc->id_bp = bp; 187 idesc->id_level--; 188 for (sizepb = sblock.fs_bsize, i = 0; i < idesc->id_level; i++) 189 sizepb *= NINDIR(&sblock); 190 if (howmany(isize, sizepb) > NINDIR(&sblock)) 191 nif = NINDIR(&sblock); 192 else 193 nif = howmany(isize, sizepb); 194 if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) { 195 for (i = nif; i < NINDIR(&sblock); i++) { 196 if (IBLK(bp, i) == 0) 197 continue; 198 (void)sprintf(buf, "PARTIALLY TRUNCATED INODE I=%lu", 199 (u_long)idesc->id_number); 200 if (preen) { 201 pfatal("%s", buf); 202 } else if (dofix(idesc, buf)) { 203 IBLK_SET(bp, i, 0); 204 dirty(bp); 205 } 206 } 207 flush(fswritefd, bp); 208 } 209 for (i = 0; i < nif; i++) { 210 if (IBLK(bp, i)) { 211 idesc->id_blkno = IBLK(bp, i); 212 bp->b_index = i; 213 if (idesc->id_level == 0) { 214 idesc->id_lbn++; 215 n = (*func)(idesc); 216 } else { 217 n = iblock(idesc, isize, type - 1); 218 idesc->id_level++; 219 } 220 if (n & STOP) { 221 brelse(bp); 222 return (n); 223 } 224 } else { 225 idesc->id_lbn += sizepb / sblock.fs_bsize; 226 if (idesc->id_type == DATA && isize > 0) { 227 /* An empty block in a directory XXX */ 228 getpathname(pathbuf, idesc->id_number, 229 idesc->id_number); 230 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 231 pathbuf); 232 if (reply("ADJUST LENGTH") == 1) { 233 ginode(idesc->id_number, &ip); 234 DIP_SET(ip.i_dp, di_size, 235 DIP(ip.i_dp, di_size) - isize); 236 isize = 0; 237 printf( 238 "YOU MUST RERUN FSCK AFTERWARDS\n"); 239 rerun = 1; 240 inodirty(&ip); 241 brelse(bp); 242 return(STOP); 243 } 244 } 245 } 246 isize -= sizepb; 247 } 248 brelse(bp); 249 return (KEEPON); 250 } 251 252 /* 253 * Finds the disk block address at the specified lbn within the inode 254 * specified by dp. This follows the whole tree and honors di_size and 255 * di_extsize so it is a true test of reachability. The lbn may be 256 * negative if an extattr or indirect block is requested. 257 */ 258 ufs2_daddr_t 259 ino_blkatoff(union dinode *dp, ino_t ino, ufs_lbn_t lbn, int *frags, 260 struct bufarea **bpp) 261 { 262 ufs_lbn_t tmpval; 263 ufs_lbn_t cur; 264 ufs_lbn_t next; 265 int i; 266 267 *frags = 0; 268 if (bpp != NULL) 269 *bpp = NULL; 270 /* 271 * Handle extattr blocks first. 272 */ 273 if (lbn < 0 && lbn >= -UFS_NXADDR) { 274 lbn = -1 - lbn; 275 if (lbn > lblkno(&sblock, dp->dp2.di_extsize - 1)) 276 return (0); 277 *frags = numfrags(&sblock, 278 sblksize(&sblock, dp->dp2.di_extsize, lbn)); 279 return (dp->dp2.di_extb[lbn]); 280 } 281 /* 282 * Now direct and indirect. 283 */ 284 if (DIP(dp, di_mode) == IFLNK && 285 DIP(dp, di_size) < sblock.fs_maxsymlinklen) 286 return (0); 287 if (lbn >= 0 && lbn < UFS_NDADDR) { 288 *frags = numfrags(&sblock, 289 sblksize(&sblock, DIP(dp, di_size), lbn)); 290 return (DIP(dp, di_db[lbn])); 291 } 292 *frags = sblock.fs_frag; 293 294 for (i = 0, tmpval = NINDIR(&sblock), cur = UFS_NDADDR; i < UFS_NIADDR; 295 i++, tmpval *= NINDIR(&sblock), cur = next) { 296 next = cur + tmpval; 297 if (lbn == -cur - i) 298 return (DIP(dp, di_ib[i])); 299 /* 300 * Determine whether the lbn in question is within this tree. 301 */ 302 if (lbn < 0 && -lbn >= next) 303 continue; 304 if (lbn > 0 && lbn >= next) 305 continue; 306 if (DIP(dp, di_ib[i]) == 0) 307 return (0); 308 return (indir_blkatoff(DIP(dp, di_ib[i]), ino, -cur - i, lbn, 309 bpp)); 310 } 311 pfatal("lbn %jd not in ino %ju\n", lbn, (uintmax_t)ino); 312 return (0); 313 } 314 315 /* 316 * Fetch an indirect block to find the block at a given lbn. The lbn 317 * may be negative to fetch a specific indirect block pointer or positive 318 * to fetch a specific block. 319 */ 320 static ufs2_daddr_t 321 indir_blkatoff(ufs2_daddr_t blk, ino_t ino, ufs_lbn_t cur, ufs_lbn_t lbn, 322 struct bufarea **bpp) 323 { 324 struct bufarea *bp; 325 ufs_lbn_t lbnadd; 326 ufs_lbn_t base; 327 int i, level; 328 329 level = lbn_level(cur); 330 if (level == -1) 331 pfatal("Invalid indir lbn %jd in ino %ju\n", 332 lbn, (uintmax_t)ino); 333 if (level == 0 && lbn < 0) 334 pfatal("Invalid lbn %jd in ino %ju\n", 335 lbn, (uintmax_t)ino); 336 lbnadd = 1; 337 base = -(cur + level); 338 for (i = level; i > 0; i--) 339 lbnadd *= NINDIR(&sblock); 340 if (lbn > 0) 341 i = (lbn - base) / lbnadd; 342 else 343 i = (-lbn - base) / lbnadd; 344 if (i < 0 || i >= NINDIR(&sblock)) { 345 pfatal("Invalid indirect index %d produced by lbn %jd " 346 "in ino %ju\n", i, lbn, (uintmax_t)ino); 347 return (0); 348 } 349 if (level == 0) 350 cur = base + (i * lbnadd); 351 else 352 cur = -(base + (i * lbnadd)) - (level - 1); 353 bp = getdatablk(blk, sblock.fs_bsize, BT_LEVEL1 + level); 354 if (bp->b_errs != 0) 355 return (0); 356 blk = IBLK(bp, i); 357 bp->b_index = i; 358 if (cur == lbn || blk == 0) { 359 if (bpp != NULL) 360 *bpp = bp; 361 else 362 brelse(bp); 363 return (blk); 364 } 365 brelse(bp); 366 if (level == 0) 367 pfatal("Invalid lbn %jd at level 0 for ino %ju\n", lbn, 368 (uintmax_t)ino); 369 return (indir_blkatoff(blk, ino, cur, lbn, bpp)); 370 } 371 372 /* 373 * Check that a block in a legal block number. 374 * Return 0 if in range, 1 if out of range. 375 */ 376 int 377 chkrange(ufs2_daddr_t blk, int cnt) 378 { 379 int c; 380 381 if (cnt <= 0 || blk <= 0 || blk >= maxfsblock || 382 cnt > maxfsblock - blk) { 383 if (debug) 384 printf("out of range: blk %ld, offset %i, size %d\n", 385 (long)blk, (int)fragnum(&sblock, blk), cnt); 386 return (1); 387 } 388 if (cnt > sblock.fs_frag || 389 fragnum(&sblock, blk) + cnt > sblock.fs_frag) { 390 if (debug) 391 printf("bad size: blk %ld, offset %i, size %d\n", 392 (long)blk, (int)fragnum(&sblock, blk), cnt); 393 return (1); 394 } 395 c = dtog(&sblock, blk); 396 if (blk < cgdmin(&sblock, c)) { 397 if ((blk + cnt) > cgsblock(&sblock, c)) { 398 if (debug) { 399 printf("blk %ld < cgdmin %ld;", 400 (long)blk, (long)cgdmin(&sblock, c)); 401 printf(" blk + cnt %ld > cgsbase %ld\n", 402 (long)(blk + cnt), 403 (long)cgsblock(&sblock, c)); 404 } 405 return (1); 406 } 407 } else { 408 if ((blk + cnt) > cgbase(&sblock, c+1)) { 409 if (debug) { 410 printf("blk %ld >= cgdmin %ld;", 411 (long)blk, (long)cgdmin(&sblock, c)); 412 printf(" blk + cnt %ld > sblock.fs_fpg %ld\n", 413 (long)(blk + cnt), (long)sblock.fs_fpg); 414 } 415 return (1); 416 } 417 } 418 return (0); 419 } 420 421 /* 422 * General purpose interface for reading inodes. 423 * 424 * firstinum and lastinum track contents of getnextino() cache (below). 425 */ 426 static ino_t firstinum, lastinum; 427 static struct bufarea inobuf; 428 429 void 430 ginode(ino_t inumber, struct inode *ip) 431 { 432 ufs2_daddr_t iblk; 433 union dinodep dpp; 434 struct ufs2_dinode *dp; 435 436 if (inumber < UFS_ROOTINO || inumber >= maxino) 437 errx(EEXIT, "bad inode number %ju to ginode", 438 (uintmax_t)inumber); 439 ip->i_number = inumber; 440 if (inumber >= firstinum && inumber < lastinum) { 441 /* contents in getnextino() cache */ 442 ip->i_bp = &inobuf; 443 inobuf.b_refcnt++; 444 inobuf.b_index = firstinum; 445 } else if (icachebp != NULL && 446 inumber >= icachebp->b_index && 447 inumber < icachebp->b_index + INOPB(&sblock)) { 448 /* take an additional reference for the returned inode */ 449 icachebp->b_refcnt++; 450 ip->i_bp = icachebp; 451 } else { 452 iblk = ino_to_fsba(&sblock, inumber); 453 /* release our cache-hold reference on old icachebp */ 454 if (icachebp != NULL) 455 brelse(icachebp); 456 icachebp = getdatablk(iblk, sblock.fs_bsize, BT_INODES); 457 if (icachebp->b_errs != 0) { 458 icachebp = NULL; 459 ip->i_bp = NULL; 460 ip->i_dp = &zino; 461 return; 462 } 463 /* take a cache-hold reference on new icachebp */ 464 icachebp->b_refcnt++; 465 icachebp->b_index = rounddown(inumber, INOPB(&sblock)); 466 ip->i_bp = icachebp; 467 } 468 if (sblock.fs_magic == FS_UFS1_MAGIC) { 469 ip->i_dp = (union dinode *) 470 &ip->i_bp->b_un.b_dinode1[inumber - ip->i_bp->b_index]; 471 dpp.dp1 = (struct ufs1_dinode *)ip->i_dp; 472 if (ffs_oldfscompat_inode_read(&sblock, dpp, now)) 473 inodirty(ip); 474 return; 475 } 476 ip->i_dp = (union dinode *) 477 &ip->i_bp->b_un.b_dinode2[inumber - ip->i_bp->b_index]; 478 dpp.dp2 = dp = (struct ufs2_dinode *)ip->i_dp; 479 /* Do not check hash of inodes being created */ 480 if (dp->di_mode != 0 && ffs_verify_dinode_ckhash(&sblock, dp)) { 481 pwarn("INODE CHECK-HASH FAILED"); 482 prtinode(ip); 483 if (preen || reply("FIX") != 0) { 484 if (preen) 485 printf(" (FIXED)\n"); 486 ffs_update_dinode_ckhash(&sblock, dp); 487 inodirty(ip); 488 } 489 } 490 if (ffs_oldfscompat_inode_read(&sblock, dpp, now)) 491 inodirty(ip); 492 } 493 494 /* 495 * Release a held inode. 496 */ 497 void 498 irelse(struct inode *ip) 499 { 500 501 /* Check for failed inode read */ 502 if (ip->i_bp == NULL) 503 return; 504 if (debug && sblock.fs_magic == FS_UFS2_MAGIC && 505 ffs_verify_dinode_ckhash(&sblock, (struct ufs2_dinode *)ip->i_dp)) { 506 pwarn("irelse: releasing inode with bad check-hash"); 507 prtinode(ip); 508 } 509 if (ip->i_bp->b_refcnt <= 0) 510 pfatal("irelse: releasing unreferenced ino %ju\n", 511 (uintmax_t) ip->i_number); 512 brelse(ip->i_bp); 513 } 514 515 /* 516 * Special purpose version of ginode used to optimize first pass 517 * over all the inodes in numerical order. 518 */ 519 static ino_t nextinum, lastvalidinum; 520 static long readcount, readpercg, fullcnt, inobufsize, partialcnt, partialsize; 521 522 union dinode * 523 getnextinode(ino_t inumber, int rebuiltcg) 524 { 525 int j; 526 long size; 527 mode_t mode; 528 ufs2_daddr_t ndb, blk; 529 union dinode *dp; 530 union dinodep dpp; 531 struct inode ip; 532 static caddr_t nextinop; 533 534 if (inumber != nextinum++ || inumber > lastvalidinum) 535 errx(EEXIT, "bad inode number %ju to nextinode", 536 (uintmax_t)inumber); 537 if (inumber >= lastinum) { 538 readcount++; 539 firstinum = lastinum; 540 blk = ino_to_fsba(&sblock, lastinum); 541 if (readcount % readpercg == 0) { 542 size = partialsize; 543 lastinum += partialcnt; 544 } else { 545 size = inobufsize; 546 lastinum += fullcnt; 547 } 548 /* 549 * Flush old contents in case they have been updated. 550 * If getblk encounters an error, it will already have zeroed 551 * out the buffer, so we do not need to do so here. 552 */ 553 if (inobuf.b_refcnt != 0) 554 pfatal("Non-zero getnextinode() ref count %d\n", 555 inobuf.b_refcnt); 556 flush(fswritefd, &inobuf); 557 getblk(&inobuf, blk, size); 558 nextinop = inobuf.b_un.b_buf; 559 } 560 dp = (union dinode *)nextinop; 561 if (sblock.fs_magic == FS_UFS1_MAGIC) { 562 nextinop += sizeof(struct ufs1_dinode); 563 dpp.dp1 = (struct ufs1_dinode *)dp; 564 } else { 565 nextinop += sizeof(struct ufs2_dinode); 566 dpp.dp2 = (struct ufs2_dinode *)dp; 567 } 568 if ((ckhashadd & CK_INODE) != 0) { 569 ffs_update_dinode_ckhash(&sblock, (struct ufs2_dinode *)dp); 570 dirty(&inobuf); 571 } 572 if (ffs_verify_dinode_ckhash(&sblock, (struct ufs2_dinode *)dp) != 0) { 573 pwarn("INODE CHECK-HASH FAILED"); 574 ip.i_bp = NULL; 575 ip.i_dp = dp; 576 ip.i_number = inumber; 577 prtinode(&ip); 578 if (preen || reply("FIX") != 0) { 579 if (preen) 580 printf(" (FIXED)\n"); 581 ffs_update_dinode_ckhash(&sblock, 582 (struct ufs2_dinode *)dp); 583 dirty(&inobuf); 584 } 585 } 586 if (ffs_oldfscompat_inode_read(&sblock, dpp, now)) 587 dirty(&inobuf); 588 if (rebuiltcg && (char *)dp == inobuf.b_un.b_buf) { 589 /* 590 * Try to determine if we have reached the end of the 591 * allocated inodes. 592 */ 593 mode = DIP(dp, di_mode) & IFMT; 594 if (mode == 0) { 595 if (memcmp(dp->dp2.di_db, zino.dp2.di_db, 596 UFS_NDADDR * sizeof(ufs2_daddr_t)) || 597 memcmp(dp->dp2.di_ib, zino.dp2.di_ib, 598 UFS_NIADDR * sizeof(ufs2_daddr_t)) || 599 dp->dp2.di_mode || dp->dp2.di_size) 600 return (NULL); 601 return (dp); 602 } 603 if (!ftypeok(dp)) 604 return (NULL); 605 ndb = howmany(DIP(dp, di_size), sblock.fs_bsize); 606 if (ndb < 0) 607 return (NULL); 608 if (mode == IFBLK || mode == IFCHR) 609 ndb++; 610 if (mode == IFLNK) { 611 /* 612 * Fake ndb value so direct/indirect block checks below 613 * will detect any garbage after symlink string. 614 */ 615 if (DIP(dp, di_size) < (off_t)sblock.fs_maxsymlinklen) { 616 ndb = howmany(DIP(dp, di_size), 617 sizeof(ufs2_daddr_t)); 618 if (ndb > UFS_NDADDR) { 619 j = ndb - UFS_NDADDR; 620 for (ndb = 1; j > 1; j--) 621 ndb *= NINDIR(&sblock); 622 ndb += UFS_NDADDR; 623 } 624 } 625 } 626 for (j = ndb; ndb < UFS_NDADDR && j < UFS_NDADDR; j++) 627 if (DIP(dp, di_db[j]) != 0) 628 return (NULL); 629 for (j = 0, ndb -= UFS_NDADDR; ndb > 0; j++) 630 ndb /= NINDIR(&sblock); 631 for (; j < UFS_NIADDR; j++) 632 if (DIP(dp, di_ib[j]) != 0) 633 return (NULL); 634 } 635 return (dp); 636 } 637 638 void 639 setinodebuf(int cg, ino_t inosused) 640 { 641 struct timespec time; 642 ino_t inum; 643 644 /* 645 * Get the current value of the present time. 646 * This will happen before each cylinder group is scanned. 647 * If for some reason getting the time fails, we will use 648 * the last time that the superblock was updated. 649 */ 650 if (clock_gettime(CLOCK_REALTIME_FAST, &time) == 0) 651 now = time.tv_sec; 652 else 653 now = sblock.fs_time; 654 inum = cg * sblock.fs_ipg; 655 lastvalidinum = inum + inosused - 1; 656 nextinum = inum; 657 lastinum = inum; 658 readcount = 0; 659 /* Flush old contents in case they have been updated */ 660 flush(fswritefd, &inobuf); 661 inobuf.b_bno = 0; 662 if (inobuf.b_un.b_buf == NULL) { 663 inobufsize = blkroundup(&sblock, 664 MAX(INOBUFSIZE, sblock.fs_bsize)); 665 initbarea(&inobuf, BT_INODES); 666 if ((inobuf.b_un.b_buf = Balloc((unsigned)inobufsize)) == NULL) 667 errx(EEXIT, "cannot allocate space for inode buffer"); 668 } 669 fullcnt = inobufsize / ((sblock.fs_magic == FS_UFS1_MAGIC) ? 670 sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode)); 671 readpercg = inosused / fullcnt; 672 partialcnt = inosused % fullcnt; 673 partialsize = fragroundup(&sblock, 674 partialcnt * ((sblock.fs_magic == FS_UFS1_MAGIC) ? 675 sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode))); 676 if (partialcnt != 0) { 677 readpercg++; 678 } else { 679 partialcnt = fullcnt; 680 partialsize = inobufsize; 681 } 682 } 683 684 int 685 freeblock(struct inodesc *idesc) 686 { 687 struct dups *dlp; 688 struct bufarea *cgbp; 689 struct cg *cgp; 690 ufs2_daddr_t blkno; 691 long size, nfrags; 692 693 blkno = idesc->id_blkno; 694 if (idesc->id_type == SNAP) { 695 pfatal("clearing a snapshot dinode\n"); 696 return (STOP); 697 } 698 size = lfragtosize(&sblock, idesc->id_numfrags); 699 if (snapblkfree(&sblock, blkno, size, idesc->id_number, 700 std_checkblkavail)) 701 return (KEEPON); 702 for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) { 703 if (chkrange(blkno, 1)) { 704 return (SKIP); 705 } else if (testbmap(blkno)) { 706 for (dlp = duplist; dlp; dlp = dlp->next) { 707 if (dlp->dup != blkno) 708 continue; 709 dlp->dup = duplist->dup; 710 dlp = duplist; 711 duplist = duplist->next; 712 free((char *)dlp); 713 break; 714 } 715 if (dlp == NULL) { 716 clrbmap(blkno); 717 n_blks--; 718 } 719 } 720 } 721 /* 722 * If all successfully returned, account for them. 723 */ 724 if (nfrags == 0) { 725 cgbp = cglookup(dtog(&sblock, idesc->id_blkno)); 726 cgp = cgbp->b_un.b_cg; 727 if (idesc->id_numfrags == sblock.fs_frag) 728 cgp->cg_cs.cs_nbfree++; 729 else 730 cgp->cg_cs.cs_nffree += idesc->id_numfrags; 731 cgdirty(cgbp); 732 } 733 return (KEEPON); 734 } 735 736 /* 737 * Prepare a snapshot file for being removed. 738 */ 739 void 740 snapremove(ino_t inum) 741 { 742 struct inodesc idesc; 743 struct inode ip; 744 int i; 745 746 for (i = 0; i < snapcnt; i++) 747 if (snaplist[i].i_number == inum) 748 break; 749 if (i == snapcnt) 750 ginode(inum, &ip); 751 else 752 ip = snaplist[i]; 753 if ((DIP(ip.i_dp, di_flags) & SF_SNAPSHOT) == 0) { 754 printf("snapremove: inode %jd is not a snapshot\n", 755 (intmax_t)inum); 756 if (i == snapcnt) 757 irelse(&ip); 758 return; 759 } 760 if (debug) 761 printf("snapremove: remove %sactive snapshot %jd\n", 762 i == snapcnt ? "in" : "", (intmax_t)inum); 763 /* 764 * If on active snapshot list, remove it. 765 */ 766 if (i < snapcnt) { 767 for (i++; i < FSMAXSNAP; i++) { 768 if (sblock.fs_snapinum[i] == 0) 769 break; 770 snaplist[i - 1] = snaplist[i]; 771 sblock.fs_snapinum[i - 1] = sblock.fs_snapinum[i]; 772 } 773 sblock.fs_snapinum[i - 1] = 0; 774 bzero(&snaplist[i - 1], sizeof(struct inode)); 775 snapcnt--; 776 } 777 memset(&idesc, 0, sizeof(struct inodesc)); 778 idesc.id_type = SNAP; 779 idesc.id_func = snapclean; 780 idesc.id_number = inum; 781 (void)ckinode(ip.i_dp, &idesc); 782 DIP_SET(ip.i_dp, di_flags, DIP(ip.i_dp, di_flags) & ~SF_SNAPSHOT); 783 inodirty(&ip); 784 irelse(&ip); 785 } 786 787 static int 788 snapclean(struct inodesc *idesc) 789 { 790 ufs2_daddr_t blkno; 791 struct bufarea *bp; 792 union dinode *dp; 793 794 blkno = idesc->id_blkno; 795 if (blkno == 0) 796 return (KEEPON); 797 798 dp = idesc->id_dp; 799 if (blkno == BLK_NOCOPY || blkno == BLK_SNAP) { 800 if (idesc->id_lbn < UFS_NDADDR) { 801 DIP_SET(dp, di_db[idesc->id_lbn], 0); 802 } else { 803 bp = idesc->id_bp; 804 IBLK_SET(bp, bp->b_index, 0); 805 dirty(bp); 806 } 807 } 808 return (KEEPON); 809 } 810 811 /* 812 * Notification that a block is being freed. Return zero if the free 813 * should be allowed to proceed. Return non-zero if the snapshot file 814 * wants to claim the block. The block will be claimed if it is an 815 * uncopied part of one of the snapshots. It will be freed if it is 816 * either a BLK_NOCOPY or has already been copied in all of the snapshots. 817 * If a fragment is being freed, then all snapshots that care about 818 * it must make a copy since a snapshot file can only claim full sized 819 * blocks. Note that if more than one snapshot file maps the block, 820 * we can pick one at random to claim it. Since none of the snapshots 821 * can change, we are assurred that they will all see the same unmodified 822 * image. When deleting a snapshot file (see ino_trunc above), we 823 * must push any of these claimed blocks to one of the other snapshots 824 * that maps it. These claimed blocks are easily identified as they will 825 * have a block number equal to their logical block number within the 826 * snapshot. A copied block can never have this property because they 827 * must always have been allocated from a BLK_NOCOPY location. 828 */ 829 int 830 snapblkfree(struct fs *fs, ufs2_daddr_t bno, long size, ino_t inum, 831 ufs2_daddr_t (*checkblkavail)(ufs2_daddr_t blkno, long frags)) 832 { 833 union dinode *dp; 834 struct inode ip; 835 struct bufarea *snapbp; 836 ufs_lbn_t lbn; 837 ufs2_daddr_t blkno, relblkno; 838 int i, frags, claimedblk, copydone; 839 840 /* If no snapshots, nothing to do */ 841 if (snapcnt == 0) 842 return (0); 843 if (debug) 844 printf("snapblkfree: in ino %jd free blkno %jd, size %jd\n", 845 (intmax_t)inum, (intmax_t)bno, (intmax_t)size); 846 relblkno = blknum(fs, bno); 847 lbn = fragstoblks(fs, relblkno); 848 /* Direct blocks are always pre-copied */ 849 if (lbn < UFS_NDADDR) 850 return (0); 851 copydone = 0; 852 claimedblk = 0; 853 for (i = 0; i < snapcnt; i++) { 854 /* 855 * Lookup block being freed. 856 */ 857 ip = snaplist[i]; 858 dp = ip.i_dp; 859 blkno = ino_blkatoff(dp, inum != 0 ? inum : ip.i_number, 860 lbn, &frags, &snapbp); 861 /* 862 * Check to see if block needs to be copied. 863 */ 864 if (blkno == 0) { 865 /* 866 * A block that we map is being freed. If it has not 867 * been claimed yet, we will claim or copy it (below). 868 */ 869 claimedblk = 1; 870 } else if (blkno == BLK_SNAP) { 871 /* 872 * No previous snapshot claimed the block, 873 * so it will be freed and become a BLK_NOCOPY 874 * (don't care) for us. 875 */ 876 if (claimedblk) 877 pfatal("snapblkfree: inconsistent block type"); 878 IBLK_SET(snapbp, snapbp->b_index, BLK_NOCOPY); 879 dirty(snapbp); 880 brelse(snapbp); 881 continue; 882 } else /* BLK_NOCOPY or default */ { 883 /* 884 * If the snapshot has already copied the block 885 * (default), or does not care about the block, 886 * it is not needed. 887 */ 888 brelse(snapbp); 889 continue; 890 } 891 /* 892 * If this is a full size block, we will just grab it 893 * and assign it to the snapshot inode. Otherwise we 894 * will proceed to copy it. See explanation for this 895 * routine as to why only a single snapshot needs to 896 * claim this block. 897 */ 898 if (size == fs->fs_bsize) { 899 if (debug) 900 printf("Grabonremove snapshot %ju lbn %jd " 901 "from inum %ju\n", (intmax_t)ip.i_number, 902 (intmax_t)lbn, (uintmax_t)inum); 903 IBLK_SET(snapbp, snapbp->b_index, relblkno); 904 dirty(snapbp); 905 brelse(snapbp); 906 DIP_SET(dp, di_blocks, 907 DIP(dp, di_blocks) + btodb(size)); 908 inodirty(&ip); 909 return (1); 910 } 911 912 /* First time through, read the contents of the old block. */ 913 if (copydone == 0) { 914 copydone = 1; 915 if (blread(fsreadfd, copybuf, fsbtodb(fs, relblkno), 916 fs->fs_bsize) != 0) { 917 pfatal("Could not read snapshot %ju block " 918 "%jd\n", (intmax_t)ip.i_number, 919 (intmax_t)relblkno); 920 continue; 921 } 922 } 923 /* 924 * This allocation will never require any additional 925 * allocations for the snapshot inode. 926 */ 927 blkno = allocblk(dtog(fs, relblkno), fs->fs_frag, 928 checkblkavail); 929 if (blkno == 0) { 930 pfatal("Could not allocate block for snapshot %ju\n", 931 (intmax_t)ip.i_number); 932 continue; 933 } 934 if (debug) 935 printf("Copyonremove: snapino %jd lbn %jd for inum %ju " 936 "size %ld new blkno %jd\n", (intmax_t)ip.i_number, 937 (intmax_t)lbn, (uintmax_t)inum, size, 938 (intmax_t)blkno); 939 blwrite(fswritefd, copybuf, fsbtodb(fs, blkno), fs->fs_bsize); 940 IBLK_SET(snapbp, snapbp->b_index, blkno); 941 dirty(snapbp); 942 brelse(snapbp); 943 DIP_SET(dp, di_blocks, 944 DIP(dp, di_blocks) + btodb(fs->fs_bsize)); 945 inodirty(&ip); 946 } 947 return (0); 948 } 949 950 /* 951 * Notification that a block is being written. Return if the block 952 * is part of a snapshot as snapshots never track other snapshots. 953 * The block will be copied in all of the snapshots that are tracking 954 * it and have not yet copied it. Some buffers may hold more than one 955 * block. Here we need to check each block in the buffer. 956 */ 957 void 958 copyonwrite(struct fs *fs, struct bufarea *bp, 959 ufs2_daddr_t (*checkblkavail)(ufs2_daddr_t blkno, long frags)) 960 { 961 ufs2_daddr_t copyblkno; 962 long i, numblks; 963 964 /* If no snapshots, nothing to do. */ 965 if (snapcnt == 0) 966 return; 967 numblks = blkroundup(fs, bp->b_size) / fs->fs_bsize; 968 if (debug) 969 prtbuf(bp, "copyonwrite: checking %jd block%s in buffer", 970 (intmax_t)numblks, numblks > 1 ? "s" : ""); 971 copyblkno = blknum(fs, dbtofsb(fs, bp->b_bno)); 972 for (i = 0; i < numblks; i++) { 973 chkcopyonwrite(fs, copyblkno, checkblkavail); 974 copyblkno += fs->fs_frag; 975 } 976 } 977 978 static void 979 chkcopyonwrite(struct fs *fs, ufs2_daddr_t copyblkno, 980 ufs2_daddr_t (*checkblkavail)(ufs2_daddr_t blkno, long frags)) 981 { 982 struct inode ip; 983 union dinode *dp; 984 struct bufarea *snapbp; 985 ufs2_daddr_t blkno; 986 int i, frags, copydone; 987 ufs_lbn_t lbn; 988 989 lbn = fragstoblks(fs, copyblkno); 990 /* Direct blocks are always pre-copied */ 991 if (lbn < UFS_NDADDR) 992 return; 993 copydone = 0; 994 for (i = 0; i < snapcnt; i++) { 995 /* 996 * Lookup block being freed. 997 */ 998 ip = snaplist[i]; 999 dp = ip.i_dp; 1000 blkno = ino_blkatoff(dp, ip.i_number, lbn, &frags, &snapbp); 1001 /* 1002 * Check to see if block needs to be copied. 1003 */ 1004 if (blkno != 0) { 1005 /* 1006 * A block that we have already copied or don't track. 1007 */ 1008 brelse(snapbp); 1009 continue; 1010 } 1011 /* First time through, read the contents of the old block. */ 1012 if (copydone == 0) { 1013 copydone = 1; 1014 if (blread(fsreadfd, copybuf, fsbtodb(fs, copyblkno), 1015 fs->fs_bsize) != 0) { 1016 pfatal("Could not read snapshot %ju block " 1017 "%jd\n", (intmax_t)ip.i_number, 1018 (intmax_t)copyblkno); 1019 continue; 1020 } 1021 } 1022 /* 1023 * This allocation will never require any additional 1024 * allocations for the snapshot inode. 1025 */ 1026 if ((blkno = allocblk(dtog(fs, copyblkno), fs->fs_frag, 1027 checkblkavail)) == 0) { 1028 pfatal("Could not allocate block for snapshot %ju\n", 1029 (intmax_t)ip.i_number); 1030 continue; 1031 } 1032 if (debug) 1033 prtbuf(snapbp, "Copyonwrite: snapino %jd lbn %jd using " 1034 "blkno %ju setting in buffer", 1035 (intmax_t)ip.i_number, (intmax_t)lbn, 1036 (intmax_t)blkno); 1037 blwrite(fswritefd, copybuf, fsbtodb(fs, blkno), fs->fs_bsize); 1038 IBLK_SET(snapbp, snapbp->b_index, blkno); 1039 dirty(snapbp); 1040 brelse(snapbp); 1041 DIP_SET(dp, di_blocks, 1042 DIP(dp, di_blocks) + btodb(fs->fs_bsize)); 1043 inodirty(&ip); 1044 } 1045 return; 1046 } 1047 1048 /* 1049 * Traverse an inode and check that its block count is correct 1050 * fixing it if necessary. 1051 */ 1052 void 1053 check_blkcnt(struct inode *ip) 1054 { 1055 struct inodesc idesc; 1056 union dinode *dp; 1057 ufs2_daddr_t ndb; 1058 int j, ret, offset; 1059 1060 dp = ip->i_dp; 1061 memset(&idesc, 0, sizeof(struct inodesc)); 1062 idesc.id_func = pass1check; 1063 idesc.id_number = ip->i_number; 1064 idesc.id_type = (DIP(dp, di_flags) & SF_SNAPSHOT) == 0 ? ADDR : SNAP; 1065 (void)ckinode(dp, &idesc); 1066 if (sblock.fs_magic == FS_UFS2_MAGIC && dp->dp2.di_extsize > 0) { 1067 ndb = howmany(dp->dp2.di_extsize, sblock.fs_bsize); 1068 for (j = 0; j < UFS_NXADDR; j++) { 1069 if (--ndb == 0 && 1070 (offset = blkoff(&sblock, dp->dp2.di_extsize)) != 0) 1071 idesc.id_numfrags = numfrags(&sblock, 1072 fragroundup(&sblock, offset)); 1073 else 1074 idesc.id_numfrags = sblock.fs_frag; 1075 if (dp->dp2.di_extb[j] == 0) 1076 continue; 1077 idesc.id_blkno = dp->dp2.di_extb[j]; 1078 ret = (*idesc.id_func)(&idesc); 1079 if (ret & STOP) 1080 break; 1081 } 1082 } 1083 idesc.id_entryno *= btodb(sblock.fs_fsize); 1084 if (DIP(dp, di_blocks) != idesc.id_entryno) { 1085 if (!(sujrecovery && preen)) { 1086 pwarn("INCORRECT BLOCK COUNT I=%lu (%ju should be %ju)", 1087 (u_long)idesc.id_number, 1088 (uintmax_t)DIP(dp, di_blocks), 1089 (uintmax_t)idesc.id_entryno); 1090 if (preen) 1091 printf(" (CORRECTED)\n"); 1092 else if (reply("CORRECT") == 0) 1093 return; 1094 } 1095 if (bkgrdflag == 0) { 1096 DIP_SET(dp, di_blocks, idesc.id_entryno); 1097 inodirty(ip); 1098 } else { 1099 cmd.value = idesc.id_number; 1100 cmd.size = idesc.id_entryno - DIP(dp, di_blocks); 1101 if (debug) 1102 printf("adjblkcnt ino %ju amount %lld\n", 1103 (uintmax_t)cmd.value, (long long)cmd.size); 1104 if (sysctl(adjblkcnt, MIBSIZE, 0, 0, 1105 &cmd, sizeof cmd) == -1) 1106 rwerror("ADJUST INODE BLOCK COUNT", cmd.value); 1107 } 1108 } 1109 } 1110 1111 void 1112 freeinodebuf(void) 1113 { 1114 struct bufarea *bp; 1115 int i; 1116 1117 /* 1118 * Flush old contents in case they have been updated. 1119 */ 1120 flush(fswritefd, &inobuf); 1121 if (inobuf.b_un.b_buf != NULL) 1122 free((char *)inobuf.b_un.b_buf); 1123 inobuf.b_un.b_buf = NULL; 1124 firstinum = lastinum = 0; 1125 /* 1126 * Reload the snapshot inodes in case any of them changed. 1127 */ 1128 for (i = 0; i < snapcnt; i++) { 1129 bp = snaplist[i].i_bp; 1130 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, bp->b_bno, 1131 bp->b_size); 1132 } 1133 } 1134 1135 /* 1136 * Routines to maintain information about directory inodes. 1137 * This is built during the first pass and used during the 1138 * second and third passes. 1139 * 1140 * Enter inodes into the cache. 1141 */ 1142 struct inoinfo * 1143 cacheino(union dinode *dp, ino_t inumber) 1144 { 1145 struct inoinfo *inp; 1146 int i, blks; 1147 1148 if (getinoinfo(inumber) != NULL) 1149 pfatal("cacheino: duplicate entry for ino %jd\n", 1150 (intmax_t)inumber); 1151 if (howmany(DIP(dp, di_size), sblock.fs_bsize) > UFS_NDADDR) 1152 blks = UFS_NDADDR + UFS_NIADDR; 1153 else if (DIP(dp, di_size) > 0) 1154 blks = howmany(DIP(dp, di_size), sblock.fs_bsize); 1155 else 1156 blks = 1; 1157 inp = (struct inoinfo *) 1158 Malloc(sizeof(*inp) + (blks - 1) * sizeof(ufs2_daddr_t)); 1159 if (inp == NULL) 1160 errx(EEXIT, "cannot increase directory list"); 1161 SLIST_INSERT_HEAD(&inphash[inumber % dirhash], inp, i_hash); 1162 inp->i_flags = 0; 1163 inp->i_parent = inumber == UFS_ROOTINO ? UFS_ROOTINO : (ino_t)0; 1164 inp->i_dotdot = (ino_t)0; 1165 inp->i_number = inumber; 1166 inp->i_isize = DIP(dp, di_size); 1167 inp->i_depth = DIP(dp, di_dirdepth); 1168 inp->i_numblks = blks; 1169 for (i = 0; i < MIN(blks, UFS_NDADDR); i++) 1170 inp->i_blks[i] = DIP(dp, di_db[i]); 1171 if (blks > UFS_NDADDR) 1172 for (i = 0; i < UFS_NIADDR; i++) 1173 inp->i_blks[UFS_NDADDR + i] = DIP(dp, di_ib[i]); 1174 if (inplast == listmax) { 1175 listmax += 100; 1176 inpsort = (struct inoinfo **)reallocarray((char *)inpsort, 1177 listmax, sizeof(struct inoinfo *)); 1178 if (inpsort == NULL) 1179 errx(EEXIT, "cannot increase directory list"); 1180 } 1181 inpsort[inplast++] = inp; 1182 return (inp); 1183 } 1184 1185 /* 1186 * Look up an inode cache structure. 1187 */ 1188 struct inoinfo * 1189 getinoinfo(ino_t inumber) 1190 { 1191 struct inoinfo *inp; 1192 1193 SLIST_FOREACH(inp, &inphash[inumber % dirhash], i_hash) { 1194 if (inp->i_number != inumber) 1195 continue; 1196 return (inp); 1197 } 1198 return (NULL); 1199 } 1200 1201 /* 1202 * Remove an entry from the inode cache and disk-order sorted list. 1203 * Return 0 on success and 1 on failure. 1204 */ 1205 int 1206 removecachedino(ino_t inumber) 1207 { 1208 struct inoinfo *inp, **inpp; 1209 char *listtype; 1210 1211 listtype = "hash"; 1212 SLIST_FOREACH(inp, &inphash[inumber % dirhash], i_hash) { 1213 if (inp->i_number != inumber) 1214 continue; 1215 SLIST_REMOVE(&inphash[inumber % dirhash], inp, inoinfo, i_hash); 1216 for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--) { 1217 if (*inpp != inp) 1218 continue; 1219 *inpp = inpsort[inplast - 1]; 1220 inplast--; 1221 free(inp); 1222 return (0); 1223 } 1224 listtype = "sort"; 1225 break; 1226 } 1227 pfatal("removecachedino: entry for ino %jd not found on %s list\n", 1228 (intmax_t)inumber, listtype); 1229 return (1); 1230 } 1231 1232 /* 1233 * Clean up all the inode cache structure. 1234 */ 1235 void 1236 inocleanup(void) 1237 { 1238 struct inoinfo **inpp; 1239 1240 if (inphash == NULL) 1241 return; 1242 for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--) 1243 free((char *)(*inpp)); 1244 free((char *)inphash); 1245 inphash = NULL; 1246 free((char *)inpsort); 1247 inpsort = NULL; 1248 } 1249 1250 void 1251 inodirty(struct inode *ip) 1252 { 1253 1254 if (sblock.fs_magic == FS_UFS2_MAGIC) 1255 ffs_update_dinode_ckhash(&sblock, 1256 (struct ufs2_dinode *)ip->i_dp); 1257 dirty(ip->i_bp); 1258 } 1259 1260 void 1261 clri(struct inodesc *idesc, const char *type, int flag) 1262 { 1263 union dinode *dp; 1264 struct inode ip; 1265 1266 ginode(idesc->id_number, &ip); 1267 dp = ip.i_dp; 1268 if (flag == 1) { 1269 pwarn("%s %s", type, 1270 (DIP(dp, di_mode) & IFMT) == IFDIR ? "DIR" : "FILE"); 1271 prtinode(&ip); 1272 printf("\n"); 1273 } 1274 if (preen || reply("CLEAR") == 1) { 1275 if (preen) 1276 printf(" (CLEARED)\n"); 1277 n_files--; 1278 if (bkgrdflag == 0) { 1279 if (idesc->id_type == SNAP) { 1280 snapremove(idesc->id_number); 1281 idesc->id_type = ADDR; 1282 } 1283 (void)ckinode(dp, idesc); 1284 inoinfo(idesc->id_number)->ino_state = USTATE; 1285 clearinode(dp); 1286 inodirty(&ip); 1287 } else { 1288 cmd.value = idesc->id_number; 1289 cmd.size = -DIP(dp, di_nlink); 1290 if (debug) 1291 printf("adjrefcnt ino %ld amt %lld\n", 1292 (long)cmd.value, (long long)cmd.size); 1293 if (sysctl(adjrefcnt, MIBSIZE, 0, 0, 1294 &cmd, sizeof cmd) == -1) 1295 rwerror("ADJUST INODE", cmd.value); 1296 } 1297 } 1298 irelse(&ip); 1299 } 1300 1301 int 1302 findname(struct inodesc *idesc) 1303 { 1304 struct direct *dirp = idesc->id_dirp; 1305 1306 if (dirp->d_ino != idesc->id_parent || idesc->id_entryno < 2) { 1307 idesc->id_entryno++; 1308 return (KEEPON); 1309 } 1310 memmove(idesc->id_name, dirp->d_name, (size_t)dirp->d_namlen + 1); 1311 return (STOP|FOUND); 1312 } 1313 1314 int 1315 findino(struct inodesc *idesc) 1316 { 1317 struct direct *dirp = idesc->id_dirp; 1318 1319 if (dirp->d_ino == 0) 1320 return (KEEPON); 1321 if (strcmp(dirp->d_name, idesc->id_name) == 0 && 1322 dirp->d_ino >= UFS_ROOTINO && dirp->d_ino < maxino) { 1323 idesc->id_parent = dirp->d_ino; 1324 return (STOP|FOUND); 1325 } 1326 return (KEEPON); 1327 } 1328 1329 int 1330 clearentry(struct inodesc *idesc) 1331 { 1332 struct direct *dirp = idesc->id_dirp; 1333 1334 if (dirp->d_ino != idesc->id_parent || idesc->id_entryno < 2) { 1335 idesc->id_entryno++; 1336 return (KEEPON); 1337 } 1338 dirp->d_ino = 0; 1339 return (STOP|FOUND|ALTERED); 1340 } 1341 1342 void 1343 prtinode(struct inode *ip) 1344 { 1345 char *p; 1346 union dinode *dp; 1347 struct passwd *pw; 1348 time_t t; 1349 1350 dp = ip->i_dp; 1351 printf(" I=%lu ", (u_long)ip->i_number); 1352 if (ip->i_number < UFS_ROOTINO || ip->i_number >= maxino) 1353 return; 1354 printf(" OWNER="); 1355 if ((pw = getpwuid((int)DIP(dp, di_uid))) != NULL) 1356 printf("%s ", pw->pw_name); 1357 else 1358 printf("%u ", (unsigned)DIP(dp, di_uid)); 1359 printf("MODE=%o\n", DIP(dp, di_mode)); 1360 if (preen) 1361 printf("%s: ", cdevname); 1362 printf("SIZE=%ju ", (uintmax_t)DIP(dp, di_size)); 1363 t = DIP(dp, di_mtime); 1364 if ((p = ctime(&t)) != NULL) 1365 printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]); 1366 } 1367 1368 void 1369 blkerror(ino_t ino, const char *type, ufs2_daddr_t blk) 1370 { 1371 1372 pfatal("%jd %s I=%ju", (intmax_t)blk, type, (uintmax_t)ino); 1373 printf("\n"); 1374 switch (inoinfo(ino)->ino_state) { 1375 1376 case FSTATE: 1377 case FZLINK: 1378 inoinfo(ino)->ino_state = FCLEAR; 1379 return; 1380 1381 case DSTATE: 1382 case DZLINK: 1383 inoinfo(ino)->ino_state = DCLEAR; 1384 return; 1385 1386 case FCLEAR: 1387 case DCLEAR: 1388 return; 1389 1390 default: 1391 errx(EEXIT, "BAD STATE %d TO BLKERR", inoinfo(ino)->ino_state); 1392 /* NOTREACHED */ 1393 } 1394 } 1395 1396 /* 1397 * allocate an unused inode 1398 */ 1399 ino_t 1400 allocino(ino_t request, int type) 1401 { 1402 ino_t ino; 1403 struct inode ip; 1404 union dinode *dp; 1405 struct bufarea *cgbp; 1406 struct cg *cgp; 1407 int cg, anyino; 1408 1409 anyino = 0; 1410 if (request == 0) { 1411 request = UFS_ROOTINO; 1412 anyino = 1; 1413 } else if (inoinfo(request)->ino_state != USTATE) 1414 return (0); 1415 retry: 1416 for (ino = request; ino < maxino; ino++) 1417 if (inoinfo(ino)->ino_state == USTATE) 1418 break; 1419 if (ino >= maxino) 1420 return (0); 1421 cg = ino_to_cg(&sblock, ino); 1422 cgbp = cglookup(cg); 1423 cgp = cgbp->b_un.b_cg; 1424 if (!check_cgmagic(cg, cgbp)) { 1425 if (anyino == 0) 1426 return (0); 1427 request = (cg + 1) * sblock.fs_ipg; 1428 goto retry; 1429 } 1430 setbit(cg_inosused(cgp), ino % sblock.fs_ipg); 1431 cgp->cg_cs.cs_nifree--; 1432 switch (type & IFMT) { 1433 case IFDIR: 1434 inoinfo(ino)->ino_state = DSTATE; 1435 cgp->cg_cs.cs_ndir++; 1436 break; 1437 case IFREG: 1438 case IFLNK: 1439 inoinfo(ino)->ino_state = FSTATE; 1440 break; 1441 default: 1442 return (0); 1443 } 1444 cgdirty(cgbp); 1445 ginode(ino, &ip); 1446 dp = ip.i_dp; 1447 memset(dp, 0, ((sblock.fs_magic == FS_UFS1_MAGIC) ? 1448 sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode))); 1449 DIP_SET(dp, di_db[0], allocblk(ino_to_cg(&sblock, ino), (long)1, 1450 std_checkblkavail)); 1451 if (DIP(dp, di_db[0]) == 0) { 1452 inoinfo(ino)->ino_state = USTATE; 1453 inodirty(&ip); 1454 irelse(&ip); 1455 return (0); 1456 } 1457 DIP_SET(dp, di_mode, type); 1458 DIP_SET(dp, di_atime, time(NULL)); 1459 DIP_SET(dp, di_ctime, DIP(dp, di_atime)); 1460 DIP_SET(dp, di_mtime, DIP(dp, di_ctime)); 1461 DIP_SET(dp, di_size, sblock.fs_fsize); 1462 DIP_SET(dp, di_blocks, btodb(sblock.fs_fsize)); 1463 n_files++; 1464 inodirty(&ip); 1465 irelse(&ip); 1466 inoinfo(ino)->ino_type = IFTODT(type); 1467 return (ino); 1468 } 1469 1470 /* 1471 * deallocate an inode 1472 */ 1473 void 1474 freeino(ino_t ino) 1475 { 1476 struct inodesc idesc; 1477 union dinode *dp; 1478 struct inode ip; 1479 1480 memset(&idesc, 0, sizeof(struct inodesc)); 1481 idesc.id_type = ADDR; 1482 idesc.id_func = freeblock; 1483 idesc.id_number = ino; 1484 ginode(ino, &ip); 1485 dp = ip.i_dp; 1486 (void)ckinode(dp, &idesc); 1487 clearinode(dp); 1488 inodirty(&ip); 1489 irelse(&ip); 1490 inoinfo(ino)->ino_state = USTATE; 1491 n_files--; 1492 } 1493