inode.c revision 1.29
1 /* $NetBSD: inode.c,v 1.29 2005/06/27 02:50:01 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Konrad E. Schroder <perseant (at) hhhh.org>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1980, 1986, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 #include <sys/types.h> 69 #include <sys/param.h> 70 #include <sys/time.h> 71 #include <sys/buf.h> 72 #include <sys/mount.h> 73 74 #include <ufs/ufs/inode.h> 75 #include <ufs/ufs/dir.h> 76 #define vnode uvnode 77 #include <ufs/lfs/lfs.h> 78 #undef vnode 79 80 #include <err.h> 81 #ifndef SMALL 82 #include <pwd.h> 83 #endif 84 #include <stdio.h> 85 #include <stdlib.h> 86 #include <string.h> 87 88 #include "bufcache.h" 89 #include "vnode.h" 90 #include "lfs.h" 91 92 #include "fsck.h" 93 #include "fsutil.h" 94 #include "extern.h" 95 96 extern SEGUSE *seg_table; 97 extern ufs_daddr_t *din_table; 98 99 static int iblock(struct inodesc *, long, u_int64_t); 100 int blksreqd(struct lfs *, int); 101 int lfs_maxino(void); 102 103 /* 104 * Get a dinode of a given inum. 105 * XXX combine this function with vget. 106 */ 107 struct ufs1_dinode * 108 ginode(ino_t ino) 109 { 110 struct uvnode *vp; 111 struct ubuf *bp; 112 IFILE *ifp; 113 114 vp = vget(fs, ino); 115 if (vp == NULL) 116 return NULL; 117 118 if (din_table[ino] == 0x0) { 119 LFS_IENTRY(ifp, fs, ino, bp); 120 din_table[ino] = ifp->if_daddr; 121 seg_table[dtosn(fs, ifp->if_daddr)].su_nbytes += DINODE1_SIZE; 122 brelse(bp); 123 } 124 return (VTOI(vp)->i_din.ffs1_din); 125 } 126 127 /* 128 * Check validity of held blocks in an inode, recursing through all blocks. 129 */ 130 int 131 ckinode(struct ufs1_dinode *dp, struct inodesc *idesc) 132 { 133 ufs_daddr_t *ap, lbn; 134 long ret, n, ndb, offset; 135 struct ufs1_dinode dino; 136 u_int64_t remsize, sizepb; 137 mode_t mode; 138 char pathbuf[MAXPATHLEN + 1]; 139 struct uvnode *vp, *thisvp; 140 141 if (idesc->id_fix != IGNORE) 142 idesc->id_fix = DONTKNOW; 143 idesc->id_entryno = 0; 144 idesc->id_filesize = dp->di_size; 145 mode = dp->di_mode & IFMT; 146 if (mode == IFBLK || mode == IFCHR || 147 (mode == IFLNK && (dp->di_size < fs->lfs_maxsymlinklen || 148 (fs->lfs_maxsymlinklen == 0 && 149 dp->di_blocks == 0)))) 150 return (KEEPON); 151 dino = *dp; 152 ndb = howmany(dino.di_size, fs->lfs_bsize); 153 154 thisvp = vget(fs, idesc->id_number); 155 for (lbn = 0; lbn < NDADDR; lbn++) { 156 ap = dino.di_db + lbn; 157 if (thisvp) 158 idesc->id_numfrags = 159 numfrags(fs, VTOI(thisvp)->i_lfs_fragsize[lbn]); 160 else { 161 if (--ndb == 0 && (offset = blkoff(fs, dino.di_size)) != 0) { 162 idesc->id_numfrags = 163 numfrags(fs, fragroundup(fs, offset)); 164 } else 165 idesc->id_numfrags = fs->lfs_frag; 166 } 167 if (*ap == 0) { 168 if (idesc->id_type == DATA && ndb >= 0) { 169 /* An empty block in a directory XXX */ 170 getpathname(pathbuf, sizeof(pathbuf), 171 idesc->id_number, idesc->id_number); 172 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 173 pathbuf); 174 if (reply("ADJUST LENGTH") == 1) { 175 vp = vget(fs, idesc->id_number); 176 dp = VTOD(vp); 177 dp->di_size = (ap - &dino.di_db[0]) * 178 fs->lfs_bsize; 179 printf( 180 "YOU MUST RERUN FSCK AFTERWARDS\n"); 181 rerun = 1; 182 inodirty(VTOI(vp)); 183 } 184 } 185 continue; 186 } 187 idesc->id_blkno = *ap; 188 idesc->id_lblkno = ap - &dino.di_db[0]; 189 if (idesc->id_type == ADDR) { 190 ret = (*idesc->id_func) (idesc); 191 } else 192 ret = dirscan(idesc); 193 if (ret & STOP) 194 return (ret); 195 } 196 idesc->id_numfrags = fs->lfs_frag; 197 remsize = dino.di_size - fs->lfs_bsize * NDADDR; 198 sizepb = fs->lfs_bsize; 199 for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) { 200 if (*ap) { 201 idesc->id_blkno = *ap; 202 ret = iblock(idesc, n, remsize); 203 if (ret & STOP) 204 return (ret); 205 } else { 206 if (idesc->id_type == DATA && remsize > 0) { 207 /* An empty block in a directory XXX */ 208 getpathname(pathbuf, sizeof(pathbuf), 209 idesc->id_number, idesc->id_number); 210 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 211 pathbuf); 212 if (reply("ADJUST LENGTH") == 1) { 213 vp = vget(fs, idesc->id_number); 214 dp = VTOD(vp); 215 dp->di_size -= remsize; 216 remsize = 0; 217 printf( 218 "YOU MUST RERUN FSCK AFTERWARDS\n"); 219 rerun = 1; 220 inodirty(VTOI(vp)); 221 break; 222 } 223 } 224 } 225 sizepb *= NINDIR(fs); 226 remsize -= sizepb; 227 } 228 return (KEEPON); 229 } 230 231 static int 232 iblock(struct inodesc *idesc, long ilevel, u_int64_t isize) 233 { 234 ufs_daddr_t *ap, *aplim; 235 struct ubuf *bp; 236 int i, n, (*func) (struct inodesc *), nif; 237 u_int64_t sizepb; 238 char pathbuf[MAXPATHLEN + 1], buf[BUFSIZ]; 239 struct uvnode *devvp, *vp; 240 int diddirty = 0; 241 242 if (idesc->id_type == ADDR) { 243 func = idesc->id_func; 244 n = (*func) (idesc); 245 if ((n & KEEPON) == 0) 246 return (n); 247 } else 248 func = dirscan; 249 if (chkrange(idesc->id_blkno, fragstofsb(fs, idesc->id_numfrags))) 250 return (SKIP); 251 252 devvp = fs->lfs_devvp; 253 bread(devvp, fsbtodb(fs, idesc->id_blkno), fs->lfs_bsize, NOCRED, &bp); 254 ilevel--; 255 for (sizepb = fs->lfs_bsize, i = 0; i < ilevel; i++) 256 sizepb *= NINDIR(fs); 257 if (isize > sizepb * NINDIR(fs)) 258 nif = NINDIR(fs); 259 else 260 nif = howmany(isize, sizepb); 261 if (idesc->id_func == pass1check && nif < NINDIR(fs)) { 262 aplim = ((ufs_daddr_t *) bp->b_data) + NINDIR(fs); 263 for (ap = ((ufs_daddr_t *) bp->b_data) + nif; ap < aplim; ap++) { 264 if (*ap == 0) 265 continue; 266 (void) sprintf(buf, "PARTIALLY TRUNCATED INODE I=%u", 267 idesc->id_number); 268 if (dofix(idesc, buf)) { 269 *ap = 0; 270 ++diddirty; 271 } 272 } 273 } 274 aplim = ((ufs_daddr_t *) bp->b_data) + nif; 275 for (ap = ((ufs_daddr_t *) bp->b_data); ap < aplim; ap++) { 276 if (*ap) { 277 idesc->id_blkno = *ap; 278 if (ilevel == 0) { 279 /* 280 * dirscan needs lblkno. 281 */ 282 idesc->id_lblkno++; 283 n = (*func) (idesc); 284 } else { 285 n = iblock(idesc, ilevel, isize); 286 } 287 if (n & STOP) { 288 if (diddirty) 289 VOP_BWRITE(bp); 290 else 291 brelse(bp); 292 return (n); 293 } 294 } else { 295 if (idesc->id_type == DATA && isize > 0) { 296 /* An empty block in a directory XXX */ 297 getpathname(pathbuf, sizeof(pathbuf), 298 idesc->id_number, idesc->id_number); 299 pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS", 300 pathbuf); 301 if (reply("ADJUST LENGTH") == 1) { 302 vp = vget(fs, idesc->id_number); 303 VTOI(vp)->i_ffs1_size -= isize; 304 isize = 0; 305 printf( 306 "YOU MUST RERUN FSCK AFTERWARDS\n"); 307 rerun = 1; 308 inodirty(VTOI(vp)); 309 if (diddirty) 310 VOP_BWRITE(bp); 311 else 312 brelse(bp); 313 return (STOP); 314 } 315 } 316 } 317 isize -= sizepb; 318 } 319 if (diddirty) 320 VOP_BWRITE(bp); 321 else 322 brelse(bp); 323 return (KEEPON); 324 } 325 326 /* 327 * Check that a block in a legal block number. 328 * Return 0 if in range, 1 if out of range. 329 */ 330 int 331 chkrange(daddr_t blk, int cnt) 332 { 333 if (blk < sntod(fs, 0)) { 334 return (1); 335 } 336 if (blk > maxfsblock) { 337 return (1); 338 } 339 if (blk + cnt < sntod(fs, 0)) { 340 return (1); 341 } 342 if (blk + cnt > maxfsblock) { 343 return (1); 344 } 345 return (0); 346 } 347 348 /* 349 * Routines to maintain information about directory inodes. 350 * This is built during the first pass and used during the 351 * second and third passes. 352 * 353 * Enter inodes into the cache. 354 */ 355 void 356 cacheino(struct ufs1_dinode * dp, ino_t inumber) 357 { 358 struct inoinfo *inp; 359 struct inoinfo **inpp, **ninpsort; 360 unsigned int blks; 361 362 blks = howmany(dp->di_size, fs->lfs_bsize); 363 if (blks > NDADDR) 364 blks = NDADDR + NIADDR; 365 inp = (struct inoinfo *) 366 malloc(sizeof(*inp) + (blks - 1) * sizeof(ufs_daddr_t)); 367 if (inp == NULL) 368 return; 369 inpp = &inphead[inumber % numdirs]; 370 inp->i_nexthash = *inpp; 371 *inpp = inp; 372 inp->i_child = inp->i_sibling = inp->i_parentp = 0; 373 if (inumber == ROOTINO) 374 inp->i_parent = ROOTINO; 375 else 376 inp->i_parent = (ino_t) 0; 377 inp->i_dotdot = (ino_t) 0; 378 inp->i_number = inumber; 379 inp->i_isize = dp->di_size; 380 381 inp->i_numblks = blks * sizeof(ufs_daddr_t); 382 memcpy(&inp->i_blks[0], &dp->di_db[0], (size_t) inp->i_numblks); 383 if (inplast == listmax) { 384 ninpsort = (struct inoinfo **) realloc((char *) inpsort, 385 (unsigned) (listmax + 100) * sizeof(struct inoinfo *)); 386 if (ninpsort == NULL) 387 err(8, "cannot increase directory list\n"); 388 inpsort = ninpsort; 389 listmax += 100; 390 } 391 inpsort[inplast++] = inp; 392 } 393 394 /* 395 * Look up an inode cache structure. 396 */ 397 struct inoinfo * 398 getinoinfo(ino_t inumber) 399 { 400 struct inoinfo *inp; 401 402 for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) { 403 if (inp->i_number != inumber) 404 continue; 405 return (inp); 406 } 407 err(8, "cannot find inode %d\n", inumber); 408 return ((struct inoinfo *) 0); 409 } 410 411 /* 412 * Clean up all the inode cache structure. 413 */ 414 void 415 inocleanup(void) 416 { 417 struct inoinfo **inpp; 418 419 if (inphead == NULL) 420 return; 421 for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--) 422 free((char *) (*inpp)); 423 free((char *) inphead); 424 free((char *) inpsort); 425 inphead = inpsort = NULL; 426 } 427 428 void 429 inodirty(struct inode *ip) 430 { 431 ip->i_flag |= IN_MODIFIED; 432 } 433 434 void 435 clri(struct inodesc * idesc, const char *type, int flag) 436 { 437 struct uvnode *vp; 438 439 vp = vget(fs, idesc->id_number); 440 if (flag == 1) { 441 pwarn("%s %s", type, 442 (VTOI(vp)->i_ffs1_mode & IFMT) == IFDIR ? "DIR" : "FILE"); 443 pinode(idesc->id_number); 444 } 445 if (flag == 2 || preen || reply("CLEAR") == 1) { 446 if (preen && flag != 2) 447 printf(" (CLEARED)\n"); 448 n_files--; 449 (void) ckinode(VTOD(vp), idesc); 450 clearinode(idesc->id_number); 451 statemap[idesc->id_number] = USTATE; 452 vnode_destroy(vp); 453 } 454 } 455 456 void 457 clearinode(ino_t inumber) 458 { 459 struct ubuf *bp; 460 IFILE *ifp; 461 daddr_t daddr; 462 463 /* Send cleared inode to the free list */ 464 465 LFS_IENTRY(ifp, fs, inumber, bp); 466 daddr = ifp->if_daddr; 467 ifp->if_daddr = LFS_UNUSED_DADDR; 468 ifp->if_nextfree = fs->lfs_freehd; 469 fs->lfs_freehd = inumber; 470 sbdirty(); 471 VOP_BWRITE(bp); 472 473 /* 474 * update segment usage. 475 */ 476 if (daddr != LFS_UNUSED_DADDR) { 477 SEGUSE *sup; 478 u_int32_t oldsn = dtosn(fs, daddr); 479 480 LFS_SEGENTRY(sup, fs, oldsn, bp); 481 sup->su_nbytes -= DINODE1_SIZE; 482 LFS_WRITESEGENTRY(sup, fs, oldsn, bp); /* Ifile */ 483 } 484 } 485 486 int 487 findname(struct inodesc * idesc) 488 { 489 struct direct *dirp = idesc->id_dirp; 490 size_t len; 491 char *buf; 492 493 if (dirp->d_ino != idesc->id_parent) 494 return (KEEPON); 495 if ((len = dirp->d_namlen + 1) > MAXPATHLEN) { 496 /* Truncate it but don't overflow the buffer */ 497 len = MAXPATHLEN; 498 } 499 /* this is namebuf with utils.h */ 500 buf = __UNCONST(idesc->id_name); 501 (void)memcpy(buf, dirp->d_name, len); 502 return (STOP | FOUND); 503 } 504 505 int 506 findino(struct inodesc * idesc) 507 { 508 struct direct *dirp = idesc->id_dirp; 509 510 if (dirp->d_ino == 0) 511 return (KEEPON); 512 if (strcmp(dirp->d_name, idesc->id_name) == 0 && 513 dirp->d_ino >= ROOTINO && dirp->d_ino < maxino) { 514 idesc->id_parent = dirp->d_ino; 515 return (STOP | FOUND); 516 } 517 return (KEEPON); 518 } 519 520 void 521 pinode(ino_t ino) 522 { 523 struct ufs1_dinode *dp; 524 char *p; 525 struct passwd *pw; 526 time_t t; 527 528 printf(" I=%u ", ino); 529 if (ino < ROOTINO || ino >= maxino) 530 return; 531 dp = ginode(ino); 532 if (dp) { 533 printf(" OWNER="); 534 #ifndef SMALL 535 if ((pw = getpwuid((int) dp->di_uid)) != 0) 536 printf("%s ", pw->pw_name); 537 else 538 #endif 539 printf("%u ", (unsigned) dp->di_uid); 540 printf("MODE=%o\n", dp->di_mode); 541 if (preen) 542 printf("%s: ", cdevname()); 543 printf("SIZE=%llu ", (unsigned long long) dp->di_size); 544 t = dp->di_mtime; 545 p = ctime(&t); 546 printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]); 547 } 548 } 549 550 void 551 blkerror(ino_t ino, const char *type, daddr_t blk) 552 { 553 554 pfatal("%lld %s I=%u", (long long) blk, type, ino); 555 printf("\n"); 556 if (exitonfail) 557 exit(1); 558 switch (statemap[ino]) { 559 560 case FSTATE: 561 statemap[ino] = FCLEAR; 562 return; 563 564 case DSTATE: 565 statemap[ino] = DCLEAR; 566 return; 567 568 case FCLEAR: 569 case DCLEAR: 570 return; 571 572 default: 573 err(8, "BAD STATE %d TO BLKERR\n", statemap[ino]); 574 /* NOTREACHED */ 575 } 576 } 577 578 /* 579 * allocate an unused inode 580 */ 581 ino_t 582 allocino(ino_t request, int type) 583 { 584 ino_t ino; 585 struct ufs1_dinode *dp; 586 time_t t; 587 struct uvnode *vp; 588 struct ubuf *bp; 589 590 if (request == 0) 591 request = ROOTINO; 592 else if (statemap[request] != USTATE) 593 return (0); 594 for (ino = request; ino < maxino; ino++) 595 if (statemap[ino] == USTATE) 596 break; 597 if (ino == maxino) 598 return (0); 599 switch (type & IFMT) { 600 case IFDIR: 601 statemap[ino] = DSTATE; 602 break; 603 case IFREG: 604 case IFLNK: 605 statemap[ino] = FSTATE; 606 break; 607 default: 608 return (0); 609 } 610 vp = lfs_valloc(fs, ino); 611 if (vp == NULL) 612 return (0); 613 dp = (VTOI(vp)->i_din.ffs1_din); 614 bp = getblk(vp, 0, fs->lfs_fsize); 615 VOP_BWRITE(bp); 616 dp->di_mode = type; 617 (void) time(&t); 618 dp->di_atime = t; 619 dp->di_mtime = dp->di_ctime = dp->di_atime; 620 dp->di_size = fs->lfs_fsize; 621 dp->di_blocks = btofsb(fs, fs->lfs_fsize); 622 n_files++; 623 inodirty(VTOI(vp)); 624 typemap[ino] = IFTODT(type); 625 return (ino); 626 } 627 628 /* 629 * deallocate an inode 630 */ 631 void 632 freeino(ino_t ino) 633 { 634 struct inodesc idesc; 635 struct uvnode *vp; 636 637 memset(&idesc, 0, sizeof(struct inodesc)); 638 idesc.id_type = ADDR; 639 idesc.id_func = pass4check; 640 idesc.id_number = ino; 641 vp = vget(fs, ino); 642 (void) ckinode(VTOD(vp), &idesc); 643 clearinode(ino); 644 statemap[ino] = USTATE; 645 vnode_destroy(vp); 646 647 n_files--; 648 } 649
Indexes created Tue Sep 23 07:09:52 GMT 2025