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