1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 05/19/95"; 10 #endif /* not lint */ 11 12 #include <sys/param.h> 13 #include <sys/time.h> 14 15 #include <ufs/ufs/dinode.h> 16 #include <ufs/ufs/dir.h> 17 #include <ufs/ffs/fs.h> 18 19 #include <ctype.h> 20 #include <err.h> 21 #include <string.h> 22 23 #include "fsck.h" 24 25 long diskreads, totalreads; /* Disk cache statistics */ 26 27 static void rwerror __P((char *mesg, ufs_daddr_t blk)); 28 29 int 30 ftypeok(dp) 31 struct dinode *dp; 32 { 33 switch (dp->di_mode & IFMT) { 34 35 case IFDIR: 36 case IFREG: 37 case IFBLK: 38 case IFCHR: 39 case IFLNK: 40 case IFSOCK: 41 case IFIFO: 42 return (1); 43 44 default: 45 if (debug) 46 printf("bad file type 0%o\n", dp->di_mode); 47 return (0); 48 } 49 } 50 51 int 52 reply(question) 53 char *question; 54 { 55 int persevere; 56 char c; 57 58 if (preen) 59 pfatal("INTERNAL ERROR: GOT TO reply()"); 60 persevere = !strcmp(question, "CONTINUE"); 61 printf("\n"); 62 if (!persevere && (nflag || fswritefd < 0)) { 63 printf("%s? no\n\n", question); 64 return (0); 65 } 66 if (yflag || (persevere && nflag)) { 67 printf("%s? yes\n\n", question); 68 return (1); 69 } 70 do { 71 printf("%s? [yn] ", question); 72 (void) fflush(stdout); 73 c = getc(stdin); 74 while (c != '\n' && getc(stdin) != '\n') 75 if (feof(stdin)) 76 return (0); 77 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 78 printf("\n"); 79 if (c == 'y' || c == 'Y') 80 return (1); 81 return (0); 82 } 83 84 /* 85 * Malloc buffers and set up cache. 86 */ 87 void 88 bufinit() 89 { 90 register struct bufarea *bp; 91 long bufcnt, i; 92 char *bufp; 93 94 pbp = pdirbp = (struct bufarea *)0; 95 bufp = malloc((unsigned int)sblock.fs_bsize); 96 if (bufp == 0) 97 errx(EEXIT, "cannot allocate buffer pool"); 98 cgblk.b_un.b_buf = bufp; 99 initbarea(&cgblk); 100 bufhead.b_next = bufhead.b_prev = &bufhead; 101 bufcnt = MAXBUFSPACE / sblock.fs_bsize; 102 if (bufcnt < MINBUFS) 103 bufcnt = MINBUFS; 104 for (i = 0; i < bufcnt; i++) { 105 bp = (struct bufarea *)malloc(sizeof(struct bufarea)); 106 bufp = malloc((unsigned int)sblock.fs_bsize); 107 if (bp == NULL || bufp == NULL) { 108 if (i >= MINBUFS) 109 break; 110 errx(EEXIT, "cannot allocate buffer pool"); 111 } 112 bp->b_un.b_buf = bufp; 113 bp->b_prev = &bufhead; 114 bp->b_next = bufhead.b_next; 115 bufhead.b_next->b_prev = bp; 116 bufhead.b_next = bp; 117 initbarea(bp); 118 } 119 bufhead.b_size = i; /* save number of buffers */ 120 } 121 122 /* 123 * Manage a cache of directory blocks. 124 */ 125 struct bufarea * 126 getdatablk(blkno, size) 127 ufs_daddr_t blkno; 128 long size; 129 { 130 register struct bufarea *bp; 131 132 for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next) 133 if (bp->b_bno == fsbtodb(&sblock, blkno)) 134 goto foundit; 135 for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev) 136 if ((bp->b_flags & B_INUSE) == 0) 137 break; 138 if (bp == &bufhead) 139 errx(EEXIT, "deadlocked buffer pool"); 140 getblk(bp, blkno, size); 141 /* fall through */ 142 foundit: 143 totalreads++; 144 bp->b_prev->b_next = bp->b_next; 145 bp->b_next->b_prev = bp->b_prev; 146 bp->b_prev = &bufhead; 147 bp->b_next = bufhead.b_next; 148 bufhead.b_next->b_prev = bp; 149 bufhead.b_next = bp; 150 bp->b_flags |= B_INUSE; 151 return (bp); 152 } 153 154 void 155 getblk(bp, blk, size) 156 register struct bufarea *bp; 157 ufs_daddr_t blk; 158 long size; 159 { 160 ufs_daddr_t dblk; 161 162 dblk = fsbtodb(&sblock, blk); 163 if (bp->b_bno != dblk) { 164 flush(fswritefd, bp); 165 diskreads++; 166 bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size); 167 bp->b_bno = dblk; 168 bp->b_size = size; 169 } 170 } 171 172 void 173 flush(fd, bp) 174 int fd; 175 register struct bufarea *bp; 176 { 177 register int i, j; 178 179 if (!bp->b_dirty) 180 return; 181 if (bp->b_errs != 0) 182 pfatal("WRITING %sZERO'ED BLOCK %d TO DISK\n", 183 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ", 184 bp->b_bno); 185 bp->b_dirty = 0; 186 bp->b_errs = 0; 187 bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size); 188 if (bp != &sblk) 189 return; 190 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 191 bwrite(fswritefd, (char *)sblock.fs_csp[j], 192 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 193 sblock.fs_cssize - i < sblock.fs_bsize ? 194 sblock.fs_cssize - i : sblock.fs_bsize); 195 } 196 } 197 198 static void 199 rwerror(mesg, blk) 200 char *mesg; 201 ufs_daddr_t blk; 202 { 203 204 if (preen == 0) 205 printf("\n"); 206 pfatal("CANNOT %s: BLK %ld", mesg, blk); 207 if (reply("CONTINUE") == 0) 208 exit(EEXIT); 209 } 210 211 void 212 ckfini(markclean) 213 int markclean; 214 { 215 register struct bufarea *bp, *nbp; 216 int ofsmodified, cnt = 0; 217 218 if (fswritefd < 0) { 219 (void)close(fsreadfd); 220 return; 221 } 222 flush(fswritefd, &sblk); 223 if (havesb && sblk.b_bno != SBOFF / dev_bsize && 224 !preen && reply("UPDATE STANDARD SUPERBLOCK")) { 225 sblk.b_bno = SBOFF / dev_bsize; 226 sbdirty(); 227 flush(fswritefd, &sblk); 228 } 229 flush(fswritefd, &cgblk); 230 free(cgblk.b_un.b_buf); 231 for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) { 232 cnt++; 233 flush(fswritefd, bp); 234 nbp = bp->b_prev; 235 free(bp->b_un.b_buf); 236 free((char *)bp); 237 } 238 if (bufhead.b_size != cnt) 239 errx(EEXIT, "Panic: lost %d buffers", bufhead.b_size - cnt); 240 pbp = pdirbp = (struct bufarea *)0; 241 if (markclean && sblock.fs_clean == 0) { 242 sblock.fs_clean = 1; 243 sbdirty(); 244 ofsmodified = fsmodified; 245 flush(fswritefd, &sblk); 246 fsmodified = ofsmodified; 247 if (!preen) 248 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 249 } 250 if (debug) 251 printf("cache missed %ld of %ld (%d%%)\n", diskreads, 252 totalreads, (int)(diskreads * 100 / totalreads)); 253 (void)close(fsreadfd); 254 (void)close(fswritefd); 255 } 256 257 int 258 bread(fd, buf, blk, size) 259 int fd; 260 char *buf; 261 ufs_daddr_t blk; 262 long size; 263 { 264 char *cp; 265 int i, errs; 266 off_t offset; 267 268 offset = blk; 269 offset *= dev_bsize; 270 if (lseek(fd, offset, 0) < 0) 271 rwerror("SEEK", blk); 272 else if (read(fd, buf, (int)size) == size) 273 return (0); 274 rwerror("READ", blk); 275 if (lseek(fd, offset, 0) < 0) 276 rwerror("SEEK", blk); 277 errs = 0; 278 memset(buf, 0, (size_t)size); 279 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:"); 280 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) { 281 if (read(fd, cp, (int)secsize) != secsize) { 282 (void)lseek(fd, offset + i + secsize, 0); 283 if (secsize != dev_bsize && dev_bsize != 1) 284 printf(" %ld (%ld),", 285 (blk * dev_bsize + i) / secsize, 286 blk + i / dev_bsize); 287 else 288 printf(" %ld,", blk + i / dev_bsize); 289 errs++; 290 } 291 } 292 printf("\n"); 293 return (errs); 294 } 295 296 void 297 bwrite(fd, buf, blk, size) 298 int fd; 299 char *buf; 300 ufs_daddr_t blk; 301 long size; 302 { 303 int i; 304 char *cp; 305 off_t offset; 306 307 if (fd < 0) 308 return; 309 offset = blk; 310 offset *= dev_bsize; 311 if (lseek(fd, offset, 0) < 0) 312 rwerror("SEEK", blk); 313 else if (write(fd, buf, (int)size) == size) { 314 fsmodified = 1; 315 return; 316 } 317 rwerror("WRITE", blk); 318 if (lseek(fd, offset, 0) < 0) 319 rwerror("SEEK", blk); 320 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:"); 321 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize) 322 if (write(fd, cp, (int)dev_bsize) != dev_bsize) { 323 (void)lseek(fd, offset + i + dev_bsize, 0); 324 printf(" %ld,", blk + i / dev_bsize); 325 } 326 printf("\n"); 327 return; 328 } 329 330 /* 331 * allocate a data block with the specified number of fragments 332 */ 333 ufs_daddr_t 334 allocblk(frags) 335 long frags; 336 { 337 register int i, j, k; 338 339 if (frags <= 0 || frags > sblock.fs_frag) 340 return (0); 341 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) { 342 for (j = 0; j <= sblock.fs_frag - frags; j++) { 343 if (testbmap(i + j)) 344 continue; 345 for (k = 1; k < frags; k++) 346 if (testbmap(i + j + k)) 347 break; 348 if (k < frags) { 349 j += k; 350 continue; 351 } 352 for (k = 0; k < frags; k++) 353 setbmap(i + j + k); 354 n_blks += frags; 355 return (i + j); 356 } 357 } 358 return (0); 359 } 360 361 /* 362 * Free a previously allocated block 363 */ 364 void 365 freeblk(blkno, frags) 366 ufs_daddr_t blkno; 367 long frags; 368 { 369 struct inodesc idesc; 370 371 idesc.id_blkno = blkno; 372 idesc.id_numfrags = frags; 373 (void)pass4check(&idesc); 374 } 375 376 /* 377 * Find a pathname 378 */ 379 void 380 getpathname(namebuf, curdir, ino) 381 char *namebuf; 382 ino_t curdir, ino; 383 { 384 int len; 385 register char *cp; 386 struct inodesc idesc; 387 static int busy = 0; 388 extern int findname(); 389 390 if (curdir == ino && ino == ROOTINO) { 391 (void)strcpy(namebuf, "/"); 392 return; 393 } 394 if (busy || 395 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 396 (void)strcpy(namebuf, "?"); 397 return; 398 } 399 busy = 1; 400 memset(&idesc, 0, sizeof(struct inodesc)); 401 idesc.id_type = DATA; 402 idesc.id_fix = IGNORE; 403 cp = &namebuf[MAXPATHLEN - 1]; 404 *cp = '\0'; 405 if (curdir != ino) { 406 idesc.id_parent = curdir; 407 goto namelookup; 408 } 409 while (ino != ROOTINO) { 410 idesc.id_number = ino; 411 idesc.id_func = findino; 412 idesc.id_name = ".."; 413 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 414 break; 415 namelookup: 416 idesc.id_number = idesc.id_parent; 417 idesc.id_parent = ino; 418 idesc.id_func = findname; 419 idesc.id_name = namebuf; 420 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0) 421 break; 422 len = strlen(namebuf); 423 cp -= len; 424 memmove(cp, namebuf, (size_t)len); 425 *--cp = '/'; 426 if (cp < &namebuf[MAXNAMLEN]) 427 break; 428 ino = idesc.id_number; 429 } 430 busy = 0; 431 if (ino != ROOTINO) 432 *--cp = '?'; 433 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp)); 434 } 435 436 void 437 catch(sig) 438 int sig; 439 { 440 if (!doinglevel2) 441 ckfini(0); 442 exit(12); 443 } 444 445 /* 446 * When preening, allow a single quit to signal 447 * a special exit after filesystem checks complete 448 * so that reboot sequence may be interrupted. 449 */ 450 void 451 catchquit(sig) 452 int sig; 453 { 454 extern returntosingle; 455 456 printf("returning to single-user after filesystem check\n"); 457 returntosingle = 1; 458 (void)signal(SIGQUIT, SIG_DFL); 459 } 460 461 /* 462 * Ignore a single quit signal; wait and flush just in case. 463 * Used by child processes in preen. 464 */ 465 void 466 voidquit(sig) 467 int sig; 468 { 469 470 sleep(1); 471 (void)signal(SIGQUIT, SIG_IGN); 472 (void)signal(SIGQUIT, SIG_DFL); 473 } 474 475 /* 476 * determine whether an inode should be fixed. 477 */ 478 int 479 dofix(idesc, msg) 480 register struct inodesc *idesc; 481 char *msg; 482 { 483 484 switch (idesc->id_fix) { 485 486 case DONTKNOW: 487 if (idesc->id_type == DATA) 488 direrror(idesc->id_number, msg); 489 else 490 pwarn(msg); 491 if (preen) { 492 printf(" (SALVAGED)\n"); 493 idesc->id_fix = FIX; 494 return (ALTERED); 495 } 496 if (reply("SALVAGE") == 0) { 497 idesc->id_fix = NOFIX; 498 return (0); 499 } 500 idesc->id_fix = FIX; 501 return (ALTERED); 502 503 case FIX: 504 return (ALTERED); 505 506 case NOFIX: 507 case IGNORE: 508 return (0); 509 510 default: 511 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix); 512 } 513 /* NOTREACHED */ 514 return (0); 515 } 516 517 #if __STDC__ 518 #include <stdarg.h> 519 #else 520 #include <varargs.h> 521 #endif 522 523 /* 524 * An unexpected inconsistency occured. 525 * Die if preening, otherwise just print message and continue. 526 */ 527 void 528 #if __STDC__ 529 pfatal(const char *fmt, ...) 530 #else 531 pfatal(fmt, va_alist) 532 char *fmt; 533 va_dcl 534 #endif 535 { 536 va_list ap; 537 #if __STDC__ 538 va_start(ap, fmt); 539 #else 540 va_start(ap); 541 #endif 542 if (!preen) { 543 (void)vfprintf(stderr, fmt, ap); 544 va_end(ap); 545 return; 546 } 547 (void)fprintf(stderr, "%s: ", cdevname); 548 (void)vfprintf(stderr, fmt, ap); 549 (void)fprintf(stderr, 550 "\n%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n", 551 cdevname); 552 exit(EEXIT); 553 } 554 555 /* 556 * Pwarn just prints a message when not preening, 557 * or a warning (preceded by filename) when preening. 558 */ 559 void 560 #if __STDC__ 561 pwarn(const char *fmt, ...) 562 #else 563 pwarn(fmt, va_alist) 564 char *fmt; 565 va_dcl 566 #endif 567 { 568 va_list ap; 569 #if __STDC__ 570 va_start(ap, fmt); 571 #else 572 va_start(ap); 573 #endif 574 if (preen) 575 (void)fprintf(stderr, "%s: ", cdevname); 576 (void)vfprintf(stderr, fmt, ap); 577 va_end(ap); 578 } 579 580 /* 581 * Stub for routines from kernel. 582 */ 583 void 584 #if __STDC__ 585 panic(const char *fmt, ...) 586 #else 587 panic(fmt, va_alist) 588 char *fmt; 589 va_dcl 590 #endif 591 { 592 va_list ap; 593 #if __STDC__ 594 va_start(ap, fmt); 595 #else 596 va_start(ap); 597 #endif 598 pfatal("INTERNAL INCONSISTENCY:"); 599 (void)vfprintf(stderr, fmt, ap); 600 va_end(ap); 601 exit(EEXIT); 602 } 603