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 8.5 (Berkeley) 05/09/95"; 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 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 if (debug) 243 pwarn("MARKING FILE SYSTEM CLEAN\n"); 244 sblock.fs_clean = 1; 245 sbdirty(); 246 flush(fswritefd, &sblk); 247 } 248 if (debug) 249 printf("cache missed %ld of %ld (%d%%)\n", diskreads, 250 totalreads, (int)(diskreads * 100 / totalreads)); 251 (void)close(fsreadfd); 252 (void)close(fswritefd); 253 } 254 255 int 256 bread(fd, buf, blk, size) 257 int fd; 258 char *buf; 259 ufs_daddr_t blk; 260 long size; 261 { 262 char *cp; 263 int i, errs; 264 off_t offset; 265 266 offset = blk; 267 offset *= dev_bsize; 268 if (lseek(fd, offset, 0) < 0) 269 rwerror("SEEK", blk); 270 else if (read(fd, buf, (int)size) == size) 271 return (0); 272 rwerror("READ", blk); 273 if (lseek(fd, offset, 0) < 0) 274 rwerror("SEEK", blk); 275 errs = 0; 276 memset(buf, 0, (size_t)size); 277 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:"); 278 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) { 279 if (read(fd, cp, (int)secsize) != secsize) { 280 (void)lseek(fd, offset + i + secsize, 0); 281 if (secsize != dev_bsize && dev_bsize != 1) 282 printf(" %ld (%ld),", 283 (blk * dev_bsize + i) / secsize, 284 blk + i / dev_bsize); 285 else 286 printf(" %ld,", blk + i / dev_bsize); 287 errs++; 288 } 289 } 290 printf("\n"); 291 return (errs); 292 } 293 294 void 295 bwrite(fd, buf, blk, size) 296 int fd; 297 char *buf; 298 ufs_daddr_t blk; 299 long size; 300 { 301 int i; 302 char *cp; 303 off_t offset; 304 305 if (fd < 0) 306 return; 307 offset = blk; 308 offset *= dev_bsize; 309 if (lseek(fd, offset, 0) < 0) 310 rwerror("SEEK", blk); 311 else if (write(fd, buf, (int)size) == size) { 312 fsmodified = 1; 313 return; 314 } 315 rwerror("WRITE", blk); 316 if (lseek(fd, offset, 0) < 0) 317 rwerror("SEEK", blk); 318 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:"); 319 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize) 320 if (write(fd, cp, (int)dev_bsize) != dev_bsize) { 321 (void)lseek(fd, offset + i + dev_bsize, 0); 322 printf(" %ld,", blk + i / dev_bsize); 323 } 324 printf("\n"); 325 return; 326 } 327 328 /* 329 * allocate a data block with the specified number of fragments 330 */ 331 ufs_daddr_t 332 allocblk(frags) 333 long frags; 334 { 335 register int i, j, k; 336 337 if (frags <= 0 || frags > sblock.fs_frag) 338 return (0); 339 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) { 340 for (j = 0; j <= sblock.fs_frag - frags; j++) { 341 if (testbmap(i + j)) 342 continue; 343 for (k = 1; k < frags; k++) 344 if (testbmap(i + j + k)) 345 break; 346 if (k < frags) { 347 j += k; 348 continue; 349 } 350 for (k = 0; k < frags; k++) 351 setbmap(i + j + k); 352 n_blks += frags; 353 return (i + j); 354 } 355 } 356 return (0); 357 } 358 359 /* 360 * Free a previously allocated block 361 */ 362 void 363 freeblk(blkno, frags) 364 ufs_daddr_t blkno; 365 long frags; 366 { 367 struct inodesc idesc; 368 369 idesc.id_blkno = blkno; 370 idesc.id_numfrags = frags; 371 (void)pass4check(&idesc); 372 } 373 374 /* 375 * Find a pathname 376 */ 377 void 378 getpathname(namebuf, curdir, ino) 379 char *namebuf; 380 ino_t curdir, ino; 381 { 382 int len; 383 register char *cp; 384 struct inodesc idesc; 385 static int busy = 0; 386 extern int findname(); 387 388 if (curdir == ino && ino == ROOTINO) { 389 (void)strcpy(namebuf, "/"); 390 return; 391 } 392 if (busy || 393 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 394 (void)strcpy(namebuf, "?"); 395 return; 396 } 397 busy = 1; 398 memset(&idesc, 0, sizeof(struct inodesc)); 399 idesc.id_type = DATA; 400 idesc.id_fix = IGNORE; 401 cp = &namebuf[MAXPATHLEN - 1]; 402 *cp = '\0'; 403 if (curdir != ino) { 404 idesc.id_parent = curdir; 405 goto namelookup; 406 } 407 while (ino != ROOTINO) { 408 idesc.id_number = ino; 409 idesc.id_func = findino; 410 idesc.id_name = ".."; 411 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 412 break; 413 namelookup: 414 idesc.id_number = idesc.id_parent; 415 idesc.id_parent = ino; 416 idesc.id_func = findname; 417 idesc.id_name = namebuf; 418 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0) 419 break; 420 len = strlen(namebuf); 421 cp -= len; 422 memmove(cp, namebuf, (size_t)len); 423 *--cp = '/'; 424 if (cp < &namebuf[MAXNAMLEN]) 425 break; 426 ino = idesc.id_number; 427 } 428 busy = 0; 429 if (ino != ROOTINO) 430 *--cp = '?'; 431 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp)); 432 } 433 434 void 435 catch(sig) 436 int sig; 437 { 438 if (!doinglevel2) 439 ckfini(0); 440 exit(12); 441 } 442 443 /* 444 * When preening, allow a single quit to signal 445 * a special exit after filesystem checks complete 446 * so that reboot sequence may be interrupted. 447 */ 448 void 449 catchquit(sig) 450 int sig; 451 { 452 extern returntosingle; 453 454 printf("returning to single-user after filesystem check\n"); 455 returntosingle = 1; 456 (void)signal(SIGQUIT, SIG_DFL); 457 } 458 459 /* 460 * Ignore a single quit signal; wait and flush just in case. 461 * Used by child processes in preen. 462 */ 463 void 464 voidquit(sig) 465 int sig; 466 { 467 468 sleep(1); 469 (void)signal(SIGQUIT, SIG_IGN); 470 (void)signal(SIGQUIT, SIG_DFL); 471 } 472 473 /* 474 * determine whether an inode should be fixed. 475 */ 476 int 477 dofix(idesc, msg) 478 register struct inodesc *idesc; 479 char *msg; 480 { 481 482 switch (idesc->id_fix) { 483 484 case DONTKNOW: 485 if (idesc->id_type == DATA) 486 direrror(idesc->id_number, msg); 487 else 488 pwarn(msg); 489 if (preen) { 490 printf(" (SALVAGED)\n"); 491 idesc->id_fix = FIX; 492 return (ALTERED); 493 } 494 if (reply("SALVAGE") == 0) { 495 idesc->id_fix = NOFIX; 496 return (0); 497 } 498 idesc->id_fix = FIX; 499 return (ALTERED); 500 501 case FIX: 502 return (ALTERED); 503 504 case NOFIX: 505 case IGNORE: 506 return (0); 507 508 default: 509 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix); 510 } 511 /* NOTREACHED */ 512 return (0); 513 } 514 515 #if __STDC__ 516 #include <stdarg.h> 517 #else 518 #include <varargs.h> 519 #endif 520 521 /* 522 * An unexpected inconsistency occured. 523 * Die if preening, otherwise just print message and continue. 524 */ 525 void 526 #if __STDC__ 527 pfatal(const char *fmt, ...) 528 #else 529 pfatal(fmt, va_alist) 530 char *fmt; 531 va_dcl 532 #endif 533 { 534 va_list ap; 535 #if __STDC__ 536 va_start(ap, fmt); 537 #else 538 va_start(ap); 539 #endif 540 if (!preen) { 541 (void)vfprintf(stderr, fmt, ap); 542 va_end(ap); 543 return; 544 } 545 (void)fprintf(stderr, "%s: ", cdevname); 546 (void)vfprintf(stderr, fmt, ap); 547 (void)fprintf(stderr, 548 "\n%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n", 549 cdevname); 550 exit(EEXIT); 551 } 552 553 /* 554 * Pwarn just prints a message when not preening, 555 * or a warning (preceded by filename) when preening. 556 */ 557 void 558 #if __STDC__ 559 pwarn(const char *fmt, ...) 560 #else 561 pwarn(fmt, va_alist) 562 char *fmt; 563 va_dcl 564 #endif 565 { 566 va_list ap; 567 #if __STDC__ 568 va_start(ap, fmt); 569 #else 570 va_start(ap); 571 #endif 572 if (preen) 573 (void)fprintf(stderr, "%s: ", cdevname); 574 (void)vfprintf(stderr, fmt, ap); 575 va_end(ap); 576 } 577 578 /* 579 * Stub for routines from kernel. 580 */ 581 void 582 #if __STDC__ 583 panic(const char *fmt, ...) 584 #else 585 panic(fmt, va_alist) 586 char *fmt; 587 va_dcl 588 #endif 589 { 590 va_list ap; 591 #if __STDC__ 592 va_start(ap, fmt); 593 #else 594 va_start(ap); 595 #endif 596 pfatal("INTERNAL INCONSISTENCY:"); 597 (void)vfprintf(stderr, fmt, ap); 598 va_end(ap); 599 exit(EEXIT); 600 } 601