1 /*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #if 0
31 #ifndef lint
32 static const char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95";
33 #endif /* not lint */
34 #endif
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/param.h>
39 #include <sys/time.h>
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
42 #include <sys/disk.h>
43 #include <sys/disklabel.h>
44 #include <sys/ioctl.h>
45 #include <sys/stat.h>
46
47 #include <ufs/ufs/dinode.h>
48 #include <ufs/ufs/dir.h>
49 #include <ufs/ffs/fs.h>
50
51 #include <err.h>
52 #include <errno.h>
53 #include <string.h>
54 #include <ctype.h>
55 #include <fstab.h>
56 #include <stdint.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <time.h>
60 #include <unistd.h>
61
62 #include "fsck.h"
63
64 static void slowio_start(void);
65 static void slowio_end(void);
66 static void printIOstats(void);
67
68 static long diskreads, totaldiskreads, totalreads; /* Disk cache statistics */
69 static struct timespec startpass, finishpass;
70 struct timeval slowio_starttime;
71 int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */
72 int slowio_pollcnt;
73 static struct bufarea cgblk; /* backup buffer for cylinder group blocks */
74 static TAILQ_HEAD(buflist, bufarea) bufhead; /* head of buffer cache list */
75 static int numbufs; /* size of buffer cache */
76 static char *buftype[BT_NUMBUFTYPES] = BT_NAMES;
77 static struct bufarea *cgbufs; /* header for cylinder group cache */
78 static int flushtries; /* number of tries to reclaim memory */
79
80 void
fsutilinit(void)81 fsutilinit(void)
82 {
83 diskreads = totaldiskreads = totalreads = 0;
84 bzero(&startpass, sizeof(struct timespec));
85 bzero(&finishpass, sizeof(struct timespec));
86 bzero(&slowio_starttime, sizeof(struct timeval));
87 slowio_delay_usec = 10000;
88 slowio_pollcnt = 0;
89 bzero(&cgblk, sizeof(struct bufarea));
90 TAILQ_INIT(&bufhead);
91 numbufs = 0;
92 /* buftype ? */
93 cgbufs = NULL;
94 flushtries = 0;
95 }
96
97 int
ftypeok(union dinode * dp)98 ftypeok(union dinode *dp)
99 {
100 switch (DIP(dp, di_mode) & IFMT) {
101
102 case IFDIR:
103 case IFREG:
104 case IFBLK:
105 case IFCHR:
106 case IFLNK:
107 case IFSOCK:
108 case IFIFO:
109 return (1);
110
111 default:
112 if (debug)
113 printf("bad file type 0%o\n", DIP(dp, di_mode));
114 return (0);
115 }
116 }
117
118 int
reply(const char * question)119 reply(const char *question)
120 {
121 int persevere;
122 char c;
123
124 if (preen)
125 pfatal("INTERNAL ERROR: GOT TO reply()");
126 persevere = !strcmp(question, "CONTINUE");
127 printf("\n");
128 if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) {
129 printf("%s? no\n\n", question);
130 resolved = 0;
131 return (0);
132 }
133 if (yflag || (persevere && nflag)) {
134 printf("%s? yes\n\n", question);
135 return (1);
136 }
137 do {
138 printf("%s? [yn] ", question);
139 (void) fflush(stdout);
140 c = getc(stdin);
141 while (c != '\n' && getc(stdin) != '\n') {
142 if (feof(stdin)) {
143 resolved = 0;
144 return (0);
145 }
146 }
147 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
148 printf("\n");
149 if (c == 'y' || c == 'Y')
150 return (1);
151 resolved = 0;
152 return (0);
153 }
154
155 /*
156 * Look up state information for an inode.
157 */
158 struct inostat *
inoinfo(ino_t inum)159 inoinfo(ino_t inum)
160 {
161 static struct inostat unallocated = { USTATE, 0, 0 };
162 struct inostatlist *ilp;
163 int iloff;
164
165 if (inum > maxino)
166 errx(EEXIT, "inoinfo: inumber %ju out of range",
167 (uintmax_t)inum);
168 ilp = &inostathead[inum / sblock.fs_ipg];
169 iloff = inum % sblock.fs_ipg;
170 if (iloff >= ilp->il_numalloced)
171 return (&unallocated);
172 return (&ilp->il_stat[iloff]);
173 }
174
175 /*
176 * Malloc buffers and set up cache.
177 */
178 void
bufinit(void)179 bufinit(void)
180 {
181 struct bufarea *bp;
182 long bufcnt, i;
183 char *bufp;
184
185 pbp = pdirbp = (struct bufarea *)0;
186 bufp = Malloc((unsigned int)sblock.fs_bsize);
187 if (bufp == NULL)
188 errx(EEXIT, "cannot allocate buffer pool");
189 cgblk.b_un.b_buf = bufp;
190 initbarea(&cgblk, BT_CYLGRP);
191 TAILQ_INIT(&bufhead);
192 bufcnt = MAXBUFS;
193 if (bufcnt < MINBUFS)
194 bufcnt = MINBUFS;
195 for (i = 0; i < bufcnt; i++) {
196 bp = (struct bufarea *)Malloc(sizeof(struct bufarea));
197 bufp = Malloc((unsigned int)sblock.fs_bsize);
198 if (bp == NULL || bufp == NULL) {
199 if (i >= MINBUFS)
200 break;
201 errx(EEXIT, "cannot allocate buffer pool");
202 }
203 bp->b_un.b_buf = bufp;
204 TAILQ_INSERT_HEAD(&bufhead, bp, b_list);
205 initbarea(bp, BT_UNKNOWN);
206 }
207 numbufs = i; /* save number of buffers */
208 for (i = 0; i < BT_NUMBUFTYPES; i++) {
209 readtime[i].tv_sec = totalreadtime[i].tv_sec = 0;
210 readtime[i].tv_nsec = totalreadtime[i].tv_nsec = 0;
211 readcnt[i] = totalreadcnt[i] = 0;
212 }
213 }
214
215 /*
216 * Manage cylinder group buffers.
217 */
218 static struct bufarea *cgbufs; /* header for cylinder group cache */
219 static int flushtries; /* number of tries to reclaim memory */
220
221 struct bufarea *
cgget(int cg)222 cgget(int cg)
223 {
224 struct bufarea *cgbp;
225 struct cg *cgp;
226
227 if (cgbufs == NULL) {
228 cgbufs = calloc(sblock.fs_ncg, sizeof(struct bufarea));
229 if (cgbufs == NULL)
230 errx(EEXIT, "cannot allocate cylinder group buffers");
231 }
232 cgbp = &cgbufs[cg];
233 if (cgbp->b_un.b_cg != NULL)
234 return (cgbp);
235 cgp = NULL;
236 if (flushtries == 0)
237 cgp = malloc((unsigned int)sblock.fs_cgsize);
238 if (cgp == NULL) {
239 getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
240 return (&cgblk);
241 }
242 cgbp->b_un.b_cg = cgp;
243 initbarea(cgbp, BT_CYLGRP);
244 getblk(cgbp, cgtod(&sblock, cg), sblock.fs_cgsize);
245 return (cgbp);
246 }
247
248 /*
249 * Attempt to flush a cylinder group cache entry.
250 * Return whether the flush was successful.
251 */
252 int
flushentry(void)253 flushentry(void)
254 {
255 struct bufarea *cgbp;
256
257 if (flushtries == sblock.fs_ncg || cgbufs == NULL)
258 return (0);
259 cgbp = &cgbufs[flushtries++];
260 if (cgbp->b_un.b_cg == NULL)
261 return (0);
262 flush(fswritefd, cgbp);
263 free(cgbp->b_un.b_buf);
264 cgbp->b_un.b_buf = NULL;
265 return (1);
266 }
267
268 /*
269 * Manage a cache of directory blocks.
270 */
271 struct bufarea *
getdatablk(ufs2_daddr_t blkno,long size,int type)272 getdatablk(ufs2_daddr_t blkno, long size, int type)
273 {
274 struct bufarea *bp;
275
276 TAILQ_FOREACH(bp, &bufhead, b_list)
277 if (bp->b_bno == fsbtodb(&sblock, blkno))
278 goto foundit;
279 TAILQ_FOREACH_REVERSE(bp, &bufhead, buflist, b_list)
280 if ((bp->b_flags & B_INUSE) == 0)
281 break;
282 if (bp == NULL)
283 errx(EEXIT, "deadlocked buffer pool");
284 bp->b_type = type;
285 getblk(bp, blkno, size);
286 /* fall through */
287 foundit:
288 if (debug && bp->b_type != type)
289 printf("Buffer type changed from %s to %s\n",
290 buftype[bp->b_type], buftype[type]);
291 TAILQ_REMOVE(&bufhead, bp, b_list);
292 TAILQ_INSERT_HEAD(&bufhead, bp, b_list);
293 bp->b_flags |= B_INUSE;
294 return (bp);
295 }
296
297 /*
298 * Timespec operations (from <sys/time.h>).
299 */
300 #define timespecsub(vvp, uvp) \
301 do { \
302 (vvp)->tv_sec -= (uvp)->tv_sec; \
303 (vvp)->tv_nsec -= (uvp)->tv_nsec; \
304 if ((vvp)->tv_nsec < 0) { \
305 (vvp)->tv_sec--; \
306 (vvp)->tv_nsec += 1000000000; \
307 } \
308 } while (0)
309 #define timespecadd(vvp, uvp) \
310 do { \
311 (vvp)->tv_sec += (uvp)->tv_sec; \
312 (vvp)->tv_nsec += (uvp)->tv_nsec; \
313 if ((vvp)->tv_nsec >= 1000000000) { \
314 (vvp)->tv_sec++; \
315 (vvp)->tv_nsec -= 1000000000; \
316 } \
317 } while (0)
318
319 void
getblk(struct bufarea * bp,ufs2_daddr_t blk,long size)320 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
321 {
322 ufs2_daddr_t dblk;
323 struct timespec start, finish;
324
325 dblk = fsbtodb(&sblock, blk);
326 if (bp->b_bno == dblk) {
327 totalreads++;
328 } else {
329 flush(fswritefd, bp);
330 if (debug) {
331 readcnt[bp->b_type]++;
332 clock_gettime(CLOCK_REALTIME_PRECISE, &start);
333 }
334 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size);
335 if (debug) {
336 clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
337 timespecsub(&finish, &start);
338 timespecadd(&readtime[bp->b_type], &finish);
339 }
340 bp->b_bno = dblk;
341 bp->b_size = size;
342 }
343 }
344
345 void
flush(int fd,struct bufarea * bp)346 flush(int fd, struct bufarea *bp)
347 {
348 int i, j;
349
350 if (!bp->b_dirty)
351 return;
352 bp->b_dirty = 0;
353 if (fswritefd < 0) {
354 pfatal("WRITING IN READ_ONLY MODE.\n");
355 return;
356 }
357 if (bp->b_errs != 0)
358 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
359 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
360 (long long)bp->b_bno);
361 bp->b_errs = 0;
362 blwrite(fd, bp->b_un.b_buf, bp->b_bno, bp->b_size);
363 if (bp != &sblk)
364 return;
365 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
366 blwrite(fswritefd, (char *)sblock.fs_csp + i,
367 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
368 MIN(sblock.fs_cssize - i, sblock.fs_bsize));
369 }
370 }
371
372 void
rwerror(const char * mesg,ufs2_daddr_t blk)373 rwerror(const char *mesg, ufs2_daddr_t blk)
374 {
375
376 if (bkgrdcheck)
377 exit(EEXIT);
378 if (preen == 0)
379 printf("\n");
380 pfatal("CANNOT %s: %ld", mesg, (long)blk);
381 if (reply("CONTINUE") == 0)
382 exit(EEXIT);
383 }
384
385 void
ckfini(int markclean)386 ckfini(int markclean)
387 {
388 struct bufarea *bp, *nbp;
389 int ofsmodified, cnt;
390
391 if (bkgrdflag) {
392 unlink(snapname);
393 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
394 cmd.value = FS_UNCLEAN;
395 cmd.size = markclean ? -1 : 1;
396 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
397 &cmd, sizeof cmd) == -1)
398 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
399 if (!preen) {
400 printf("\n***** FILE SYSTEM MARKED %s *****\n",
401 markclean ? "CLEAN" : "DIRTY");
402 if (!markclean)
403 rerun = 1;
404 }
405 } else if (!preen && !markclean) {
406 printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
407 rerun = 1;
408 }
409 }
410 if (debug && totalreads > 0)
411 printf("cache with %d buffers missed %ld of %ld (%d%%)\n",
412 numbufs, totaldiskreads, totalreads,
413 (int)(totaldiskreads * 100 / totalreads));
414 if (fswritefd < 0) {
415 (void)close(fsreadfd);
416 return;
417 }
418 flush(fswritefd, &sblk);
419 if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
420 sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
421 !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
422 sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
423 sbdirty();
424 flush(fswritefd, &sblk);
425 }
426 flush(fswritefd, &cgblk);
427 free(cgblk.b_un.b_buf);
428 cnt = 0;
429 TAILQ_FOREACH_REVERSE_SAFE(bp, &bufhead, buflist, b_list, nbp) {
430 TAILQ_REMOVE(&bufhead, bp, b_list);
431 cnt++;
432 flush(fswritefd, bp);
433 free(bp->b_un.b_buf);
434 free((char *)bp);
435 }
436 if (numbufs != cnt)
437 errx(EEXIT, "panic: lost %d buffers", numbufs - cnt);
438 if (cgbufs != NULL) {
439 for (cnt = 0; cnt < sblock.fs_ncg; cnt++) {
440 if (cgbufs[cnt].b_un.b_cg == NULL)
441 continue;
442 flush(fswritefd, &cgbufs[cnt]);
443 free(cgbufs[cnt].b_un.b_cg);
444 }
445 free(cgbufs);
446 }
447 pbp = pdirbp = (struct bufarea *)0;
448 if (cursnapshot == 0 && sblock.fs_clean != markclean) {
449 if ((sblock.fs_clean = markclean) != 0) {
450 sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
451 sblock.fs_pendingblocks = 0;
452 sblock.fs_pendinginodes = 0;
453 }
454 sbdirty();
455 ofsmodified = fsmodified;
456 flush(fswritefd, &sblk);
457 fsmodified = ofsmodified;
458 if (!preen) {
459 printf("\n***** FILE SYSTEM MARKED %s *****\n",
460 markclean ? "CLEAN" : "DIRTY");
461 if (!markclean)
462 rerun = 1;
463 }
464 } else if (!preen) {
465 if (markclean) {
466 printf("\n***** FILE SYSTEM IS CLEAN *****\n");
467 } else {
468 printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
469 rerun = 1;
470 }
471 }
472 (void)close(fsreadfd);
473 (void)close(fswritefd);
474 }
475
476 /*
477 * Print out I/O statistics.
478 */
479 void
IOstats(char * what)480 IOstats(char *what)
481 {
482 int i;
483
484 if (debug == 0)
485 return;
486 if (diskreads == 0) {
487 printf("%s: no I/O\n\n", what);
488 return;
489 }
490 if (startpass.tv_sec == 0)
491 startpass = startprog;
492 printf("%s: I/O statistics\n", what);
493 printIOstats();
494 totaldiskreads += diskreads;
495 diskreads = 0;
496 for (i = 0; i < BT_NUMBUFTYPES; i++) {
497 timespecadd(&totalreadtime[i], &readtime[i]);
498 totalreadcnt[i] += readcnt[i];
499 readtime[i].tv_sec = readtime[i].tv_nsec = 0;
500 readcnt[i] = 0;
501 }
502 clock_gettime(CLOCK_REALTIME_PRECISE, &startpass);
503 }
504
505 void
finalIOstats(void)506 finalIOstats(void)
507 {
508 int i;
509
510 if (debug == 0)
511 return;
512 printf("Final I/O statistics\n");
513 totaldiskreads += diskreads;
514 diskreads = totaldiskreads;
515 startpass = startprog;
516 for (i = 0; i < BT_NUMBUFTYPES; i++) {
517 timespecadd(&totalreadtime[i], &readtime[i]);
518 totalreadcnt[i] += readcnt[i];
519 readtime[i] = totalreadtime[i];
520 readcnt[i] = totalreadcnt[i];
521 }
522 printIOstats();
523 }
524
printIOstats(void)525 static void printIOstats(void)
526 {
527 long long msec, totalmsec;
528 int i;
529
530 clock_gettime(CLOCK_REALTIME_PRECISE, &finishpass);
531 timespecsub(&finishpass, &startpass);
532 printf("Running time: %jd.%03ld sec\n",
533 (intmax_t)finishpass.tv_sec, finishpass.tv_nsec / 1000000);
534 printf("buffer reads by type:\n");
535 for (totalmsec = 0, i = 0; i < BT_NUMBUFTYPES; i++)
536 totalmsec += readtime[i].tv_sec * 1000 +
537 readtime[i].tv_nsec / 1000000;
538 if (totalmsec == 0)
539 totalmsec = 1;
540 for (i = 0; i < BT_NUMBUFTYPES; i++) {
541 if (readcnt[i] == 0)
542 continue;
543 msec =
544 readtime[i].tv_sec * 1000 + readtime[i].tv_nsec / 1000000;
545 printf("%21s:%8ld %2ld.%ld%% %4jd.%03ld sec %2lld.%lld%%\n",
546 buftype[i], readcnt[i], readcnt[i] * 100 / diskreads,
547 (readcnt[i] * 1000 / diskreads) % 10,
548 (intmax_t)readtime[i].tv_sec, readtime[i].tv_nsec / 1000000,
549 msec * 100 / totalmsec, (msec * 1000 / totalmsec) % 10);
550 }
551 printf("\n");
552 }
553
554 int
blread(int fd,char * buf,ufs2_daddr_t blk,long size)555 blread(int fd, char *buf, ufs2_daddr_t blk, long size)
556 {
557 char *cp;
558 int i, errs;
559 off_t offset;
560
561 offset = blk;
562 offset *= dev_bsize;
563 if (bkgrdflag)
564 slowio_start();
565 totalreads++;
566 diskreads++;
567 if (lseek(fd, offset, 0) < 0)
568 rwerror("SEEK BLK", blk);
569 else if (read(fd, buf, (int)size) == size) {
570 if (bkgrdflag)
571 slowio_end();
572 return (0);
573 }
574
575 /*
576 * This is handled specially here instead of in rwerror because
577 * rwerror is used for all sorts of errors, not just true read/write
578 * errors. It should be refactored and fixed.
579 */
580 if (surrender) {
581 pfatal("CANNOT READ_BLK: %ld", (long)blk);
582 errx(EEXIT, "ABORTING DUE TO READ ERRORS");
583 } else
584 rwerror("READ BLK", blk);
585
586 if (lseek(fd, offset, 0) < 0)
587 rwerror("SEEK BLK", blk);
588 errs = 0;
589 memset(buf, 0, (size_t)size);
590 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
591 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
592 if (read(fd, cp, (int)secsize) != secsize) {
593 (void)lseek(fd, offset + i + secsize, 0);
594 if (secsize != dev_bsize && dev_bsize != 1)
595 printf(" %jd (%jd),",
596 (intmax_t)(blk * dev_bsize + i) / secsize,
597 (intmax_t)blk + i / dev_bsize);
598 else
599 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
600 errs++;
601 }
602 }
603 printf("\n");
604 if (errs)
605 resolved = 0;
606 return (errs);
607 }
608
609 void
blwrite(int fd,char * buf,ufs2_daddr_t blk,ssize_t size)610 blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size)
611 {
612 int i;
613 char *cp;
614 off_t offset;
615
616 if (fd < 0)
617 return;
618 offset = blk;
619 offset *= dev_bsize;
620 if (lseek(fd, offset, 0) < 0)
621 rwerror("SEEK BLK", blk);
622 else if (write(fd, buf, size) == size) {
623 fsmodified = 1;
624 return;
625 }
626 resolved = 0;
627 rwerror("WRITE BLK", blk);
628 if (lseek(fd, offset, 0) < 0)
629 rwerror("SEEK BLK", blk);
630 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
631 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
632 if (write(fd, cp, dev_bsize) != dev_bsize) {
633 (void)lseek(fd, offset + i + dev_bsize, 0);
634 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
635 }
636 printf("\n");
637 return;
638 }
639
640 void
blerase(int fd,ufs2_daddr_t blk,long size)641 blerase(int fd, ufs2_daddr_t blk, long size)
642 {
643 off_t ioarg[2];
644
645 if (fd < 0)
646 return;
647 ioarg[0] = blk * dev_bsize;
648 ioarg[1] = size;
649 ioctl(fd, DIOCGDELETE, ioarg);
650 /* we don't really care if we succeed or not */
651 return;
652 }
653
654 /*
655 * Fill a contiguous region with all-zeroes. Note ZEROBUFSIZE is by
656 * definition a multiple of dev_bsize.
657 */
658 void
blzero(int fd,ufs2_daddr_t blk,long size)659 blzero(int fd, ufs2_daddr_t blk, long size)
660 {
661 static char *zero;
662 off_t offset, len;
663
664 if (fd < 0)
665 return;
666 if (zero == NULL) {
667 zero = calloc(ZEROBUFSIZE, 1);
668 if (zero == NULL)
669 errx(EEXIT, "cannot allocate buffer pool");
670 }
671 offset = blk * dev_bsize;
672 if (lseek(fd, offset, 0) < 0)
673 rwerror("SEEK BLK", blk);
674 while (size > 0) {
675 len = MIN(ZEROBUFSIZE, size);
676 if (write(fd, zero, len) != len)
677 rwerror("WRITE BLK", blk);
678 blk += len / dev_bsize;
679 size -= len;
680 }
681 }
682
683 /*
684 * Verify cylinder group's magic number and other parameters. If the
685 * test fails, offer an option to rebuild the whole cylinder group.
686 */
687 int
check_cgmagic(int cg,struct bufarea * cgbp)688 check_cgmagic(int cg, struct bufarea *cgbp)
689 {
690 struct cg *cgp = cgbp->b_un.b_cg;
691
692 /*
693 * Extended cylinder group checks.
694 */
695 if (cg_chkmagic(cgp) &&
696 ((sblock.fs_magic == FS_UFS1_MAGIC &&
697 cgp->cg_old_niblk == sblock.fs_ipg &&
698 cgp->cg_ndblk <= sblock.fs_fpg &&
699 cgp->cg_old_ncyl <= sblock.fs_old_cpg) ||
700 (sblock.fs_magic == FS_UFS2_MAGIC &&
701 cgp->cg_niblk == sblock.fs_ipg &&
702 cgp->cg_ndblk <= sblock.fs_fpg &&
703 cgp->cg_initediblk <= sblock.fs_ipg))) {
704 return (1);
705 }
706 pfatal("CYLINDER GROUP %d: BAD MAGIC NUMBER", cg);
707 if (!reply("REBUILD CYLINDER GROUP")) {
708 printf("YOU WILL NEED TO RERUN FSCK.\n");
709 rerun = 1;
710 return (1);
711 }
712 /*
713 * Zero out the cylinder group and then initialize critical fields.
714 * Bit maps and summaries will be recalculated by later passes.
715 */
716 memset(cgp, 0, (size_t)sblock.fs_cgsize);
717 cgp->cg_magic = CG_MAGIC;
718 cgp->cg_cgx = cg;
719 cgp->cg_niblk = sblock.fs_ipg;
720 cgp->cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
721 if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size)
722 cgp->cg_ndblk = sblock.fs_fpg;
723 else
724 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg);
725 cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield);
726 if (sblock.fs_magic == FS_UFS1_MAGIC) {
727 cgp->cg_niblk = 0;
728 cgp->cg_initediblk = 0;
729 cgp->cg_old_ncyl = sblock.fs_old_cpg;
730 cgp->cg_old_niblk = sblock.fs_ipg;
731 cgp->cg_old_btotoff = cgp->cg_iusedoff;
732 cgp->cg_old_boff = cgp->cg_old_btotoff +
733 sblock.fs_old_cpg * sizeof(int32_t);
734 cgp->cg_iusedoff = cgp->cg_old_boff +
735 sblock.fs_old_cpg * sizeof(u_int16_t);
736 }
737 cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
738 cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT);
739 if (sblock.fs_contigsumsize > 0) {
740 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag;
741 cgp->cg_clustersumoff =
742 roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t));
743 cgp->cg_clustersumoff -= sizeof(u_int32_t);
744 cgp->cg_clusteroff = cgp->cg_clustersumoff +
745 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
746 cgp->cg_nextfreeoff = cgp->cg_clusteroff +
747 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
748 }
749 dirty(cgbp);
750 return (0);
751 }
752
753 /*
754 * allocate a data block with the specified number of fragments
755 */
756 ufs2_daddr_t
allocblk(long frags)757 allocblk(long frags)
758 {
759 int i, j, k, cg, baseblk;
760 struct bufarea *cgbp;
761 struct cg *cgp;
762
763 if (frags <= 0 || frags > sblock.fs_frag)
764 return (0);
765 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
766 for (j = 0; j <= sblock.fs_frag - frags; j++) {
767 if (testbmap(i + j))
768 continue;
769 for (k = 1; k < frags; k++)
770 if (testbmap(i + j + k))
771 break;
772 if (k < frags) {
773 j += k;
774 continue;
775 }
776 cg = dtog(&sblock, i + j);
777 cgbp = cgget(cg);
778 cgp = cgbp->b_un.b_cg;
779 if (!check_cgmagic(cg, cgbp))
780 return (0);
781 baseblk = dtogd(&sblock, i + j);
782 for (k = 0; k < frags; k++) {
783 setbmap(i + j + k);
784 clrbit(cg_blksfree(cgp), baseblk + k);
785 }
786 n_blks += frags;
787 if (frags == sblock.fs_frag)
788 cgp->cg_cs.cs_nbfree--;
789 else
790 cgp->cg_cs.cs_nffree -= frags;
791 dirty(cgbp);
792 return (i + j);
793 }
794 }
795 return (0);
796 }
797
798 /*
799 * Free a previously allocated block
800 */
801 void
freeblk(ufs2_daddr_t blkno,long frags)802 freeblk(ufs2_daddr_t blkno, long frags)
803 {
804 struct inodesc idesc;
805
806 idesc.id_blkno = blkno;
807 idesc.id_numfrags = frags;
808 (void)pass4check(&idesc);
809 }
810
811 /* Slow down IO so as to leave some disk bandwidth for other processes */
812 void
slowio_start()813 slowio_start()
814 {
815
816 /* Delay one in every 8 operations */
817 slowio_pollcnt = (slowio_pollcnt + 1) & 7;
818 if (slowio_pollcnt == 0) {
819 gettimeofday(&slowio_starttime, NULL);
820 }
821 }
822
823 void
slowio_end()824 slowio_end()
825 {
826 struct timeval tv;
827 int delay_usec;
828
829 if (slowio_pollcnt != 0)
830 return;
831
832 /* Update the slowdown interval. */
833 gettimeofday(&tv, NULL);
834 delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
835 (tv.tv_usec - slowio_starttime.tv_usec);
836 if (delay_usec < 64)
837 delay_usec = 64;
838 if (delay_usec > 2500000)
839 delay_usec = 2500000;
840 slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
841 /* delay by 8 times the average IO delay */
842 if (slowio_delay_usec > 64)
843 usleep(slowio_delay_usec * 8);
844 }
845
846 /*
847 * Find a pathname
848 */
849 void
getpathname(char * namebuf,ino_t curdir,ino_t ino)850 getpathname(char *namebuf, ino_t curdir, ino_t ino)
851 {
852 int len;
853 char *cp;
854 struct inodesc idesc;
855 static int busy = 0;
856
857 if (curdir == ino && ino == ROOTINO) {
858 (void)strcpy(namebuf, "/");
859 return;
860 }
861 if (busy || !INO_IS_DVALID(curdir)) {
862 (void)strcpy(namebuf, "?");
863 return;
864 }
865 busy = 1;
866 memset(&idesc, 0, sizeof(struct inodesc));
867 idesc.id_type = DATA;
868 idesc.id_fix = IGNORE;
869 cp = &namebuf[MAXPATHLEN - 1];
870 *cp = '\0';
871 if (curdir != ino) {
872 idesc.id_parent = curdir;
873 goto namelookup;
874 }
875 while (ino != ROOTINO) {
876 idesc.id_number = ino;
877 idesc.id_func = findino;
878 idesc.id_name = strdup("..");
879 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
880 break;
881 namelookup:
882 idesc.id_number = idesc.id_parent;
883 idesc.id_parent = ino;
884 idesc.id_func = findname;
885 idesc.id_name = namebuf;
886 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
887 break;
888 len = strlen(namebuf);
889 cp -= len;
890 memmove(cp, namebuf, (size_t)len);
891 *--cp = '/';
892 if (cp < &namebuf[MAXNAMLEN])
893 break;
894 ino = idesc.id_number;
895 }
896 busy = 0;
897 if (ino != ROOTINO)
898 *--cp = '?';
899 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
900 }
901
902 void
catch(int sig __unused)903 catch(int sig __unused)
904 {
905
906 ckfini(0);
907 exit(12);
908 }
909
910 /*
911 * When preening, allow a single quit to signal
912 * a special exit after file system checks complete
913 * so that reboot sequence may be interrupted.
914 */
915 void
catchquit(int sig __unused)916 catchquit(int sig __unused)
917 {
918 printf("returning to single-user after file system check\n");
919 returntosingle = 1;
920 (void)signal(SIGQUIT, SIG_DFL);
921 }
922
923 /*
924 * determine whether an inode should be fixed.
925 */
926 int
dofix(struct inodesc * idesc,const char * msg)927 dofix(struct inodesc *idesc, const char *msg)
928 {
929
930 switch (idesc->id_fix) {
931
932 case DONTKNOW:
933 if (idesc->id_type == DATA)
934 direrror(idesc->id_number, msg);
935 else
936 pwarn("%s", msg);
937 if (preen) {
938 printf(" (SALVAGED)\n");
939 idesc->id_fix = FIX;
940 return (ALTERED);
941 }
942 if (reply("SALVAGE") == 0) {
943 idesc->id_fix = NOFIX;
944 return (0);
945 }
946 idesc->id_fix = FIX;
947 return (ALTERED);
948
949 case FIX:
950 return (ALTERED);
951
952 case NOFIX:
953 case IGNORE:
954 return (0);
955
956 default:
957 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
958 }
959 /* NOTREACHED */
960 return (0);
961 }
962
963 #include <stdarg.h>
964
965 /*
966 * An unexpected inconsistency occurred.
967 * Die if preening or file system is running with soft dependency protocol,
968 * otherwise just print message and continue.
969 */
970 void
pfatal(const char * fmt,...)971 pfatal(const char *fmt, ...)
972 {
973 va_list ap;
974 va_start(ap, fmt);
975 if (!preen) {
976 (void)vfprintf(stdout, fmt, ap);
977 va_end(ap);
978 if (usedsoftdep)
979 (void)fprintf(stdout,
980 "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
981 /*
982 * Force foreground fsck to clean up inconsistency.
983 */
984 if (bkgrdflag) {
985 cmd.value = FS_NEEDSFSCK;
986 cmd.size = 1;
987 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
988 &cmd, sizeof cmd) == -1)
989 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
990 fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
991 ckfini(0);
992 exit(EEXIT);
993 }
994 return;
995 }
996 if (cdevname == NULL)
997 cdevname = strdup("fsck");
998 (void)fprintf(stdout, "%s: ", cdevname);
999 (void)vfprintf(stdout, fmt, ap);
1000 (void)fprintf(stdout,
1001 "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
1002 cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
1003 /*
1004 * Force foreground fsck to clean up inconsistency.
1005 */
1006 if (bkgrdflag) {
1007 cmd.value = FS_NEEDSFSCK;
1008 cmd.size = 1;
1009 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
1010 &cmd, sizeof cmd) == -1)
1011 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
1012 }
1013 ckfini(0);
1014 exit(EEXIT);
1015 }
1016
1017 /*
1018 * Pwarn just prints a message when not preening or running soft dependency
1019 * protocol, or a warning (preceded by filename) when preening.
1020 */
1021 void
pwarn(const char * fmt,...)1022 pwarn(const char *fmt, ...)
1023 {
1024 va_list ap;
1025 va_start(ap, fmt);
1026 if (preen)
1027 (void)fprintf(stdout, "%s: ", cdevname);
1028 (void)vfprintf(stdout, fmt, ap);
1029 va_end(ap);
1030 }
1031
1032 /*
1033 * Stub for routines from kernel.
1034 */
1035 void
panic(const char * fmt,...)1036 panic(const char *fmt, ...)
1037 {
1038 va_list ap;
1039 va_start(ap, fmt);
1040 pfatal("INTERNAL INCONSISTENCY:");
1041 (void)vfprintf(stdout, fmt, ap);
1042 va_end(ap);
1043 exit(EEXIT);
1044 }
1045