2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 static const char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
43 #include <sys/disklabel.h>
44 #include <sys/ioctl.h>
47 #include <ufs/ufs/dinode.h>
48 #include <ufs/ufs/dir.h>
49 #include <ufs/ffs/fs.h>
63 static void slowio_start(void);
64 static void slowio_end(void);
66 long diskreads, totalreads; /* Disk cache statistics */
67 struct timeval slowio_starttime;
68 int slowio_delay_usec = 10000; /* Initial IO delay for background fsck */
72 ftypeok(union dinode *dp)
74 switch (DIP(dp, di_mode) & IFMT) {
87 printf("bad file type 0%o\n", DIP(dp, di_mode));
93 reply(const char *question)
99 pfatal("INTERNAL ERROR: GOT TO reply()");
100 persevere = !strcmp(question, "CONTINUE");
102 if (!persevere && (nflag || (fswritefd < 0 && bkgrdflag == 0))) {
103 printf("%s? no\n\n", question);
107 if (yflag || (persevere && nflag)) {
108 printf("%s? yes\n\n", question);
112 printf("%s? [yn] ", question);
113 (void) fflush(stdout);
115 while (c != '\n' && getc(stdin) != '\n') {
121 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
123 if (c == 'y' || c == 'Y')
130 * Look up state information for an inode.
135 static struct inostat unallocated = { USTATE, 0, 0 };
136 struct inostatlist *ilp;
140 errx(EEXIT, "inoinfo: inumber %d out of range", inum);
141 ilp = &inostathead[inum / sblock.fs_ipg];
142 iloff = inum % sblock.fs_ipg;
143 if (iloff >= ilp->il_numalloced)
144 return (&unallocated);
145 return (&ilp->il_stat[iloff]);
149 * Malloc buffers and set up cache.
158 pbp = pdirbp = (struct bufarea *)0;
159 bufp = malloc((unsigned int)sblock.fs_bsize);
161 errx(EEXIT, "cannot allocate buffer pool");
162 cgblk.b_un.b_buf = bufp;
164 bufhead.b_next = bufhead.b_prev = &bufhead;
165 bufcnt = MAXBUFSPACE / sblock.fs_bsize;
166 if (bufcnt < MINBUFS)
168 for (i = 0; i < bufcnt; i++) {
169 bp = (struct bufarea *)malloc(sizeof(struct bufarea));
170 bufp = malloc((unsigned int)sblock.fs_bsize);
171 if (bp == NULL || bufp == NULL) {
174 errx(EEXIT, "cannot allocate buffer pool");
176 bp->b_un.b_buf = bufp;
177 bp->b_prev = &bufhead;
178 bp->b_next = bufhead.b_next;
179 bufhead.b_next->b_prev = bp;
183 bufhead.b_size = i; /* save number of buffers */
187 * Manage a cache of directory blocks.
190 getdatablk(ufs2_daddr_t blkno, long size)
194 for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
195 if (bp->b_bno == fsbtodb(&sblock, blkno))
197 for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
198 if ((bp->b_flags & B_INUSE) == 0)
201 errx(EEXIT, "deadlocked buffer pool");
202 getblk(bp, blkno, size);
205 bp->b_prev->b_next = bp->b_next;
206 bp->b_next->b_prev = bp->b_prev;
207 bp->b_prev = &bufhead;
208 bp->b_next = bufhead.b_next;
209 bufhead.b_next->b_prev = bp;
211 bp->b_flags |= B_INUSE;
216 getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
221 dblk = fsbtodb(&sblock, blk);
222 if (bp->b_bno != dblk) {
223 flush(fswritefd, bp);
225 bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size);
232 flush(int fd, struct bufarea *bp)
240 pfatal("WRITING IN READ_ONLY MODE.\n");
244 pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
245 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
246 (long long)bp->b_bno);
248 blwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
251 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
252 blwrite(fswritefd, (char *)sblock.fs_csp + i,
253 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
254 sblock.fs_cssize - i < sblock.fs_bsize ?
255 sblock.fs_cssize - i : sblock.fs_bsize);
260 rwerror(const char *mesg, ufs2_daddr_t blk)
267 pfatal("CANNOT %s: %ld", mesg, (long)blk);
268 if (reply("CONTINUE") == 0)
273 ckfini(int markclean)
275 struct bufarea *bp, *nbp;
276 int ofsmodified, cnt = 0;
280 if ((!(sblock.fs_flags & FS_UNCLEAN)) != markclean) {
281 cmd.value = FS_UNCLEAN;
282 cmd.size = markclean ? -1 : 1;
283 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
284 &cmd, sizeof cmd) == -1)
285 rwerror("SET FILE SYSTEM FLAGS", FS_UNCLEAN);
287 printf("\n***** FILE SYSTEM MARKED %s *****\n",
288 markclean ? "CLEAN" : "DIRTY");
292 } else if (!preen && !markclean) {
293 printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
298 (void)close(fsreadfd);
301 flush(fswritefd, &sblk);
302 if (havesb && cursnapshot == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
303 sblk.b_bno != sblock.fs_sblockloc / dev_bsize &&
304 !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
305 sblk.b_bno = sblock.fs_sblockloc / dev_bsize;
307 flush(fswritefd, &sblk);
309 flush(fswritefd, &cgblk);
310 free(cgblk.b_un.b_buf);
311 for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
313 flush(fswritefd, bp);
315 free(bp->b_un.b_buf);
318 if (bufhead.b_size != cnt)
319 errx(EEXIT, "panic: lost %d buffers", bufhead.b_size - cnt);
320 pbp = pdirbp = (struct bufarea *)0;
321 if (cursnapshot == 0 && sblock.fs_clean != markclean) {
322 if ((sblock.fs_clean = markclean) != 0) {
323 sblock.fs_flags &= ~(FS_UNCLEAN | FS_NEEDSFSCK);
324 sblock.fs_pendingblocks = 0;
325 sblock.fs_pendinginodes = 0;
328 ofsmodified = fsmodified;
329 flush(fswritefd, &sblk);
330 fsmodified = ofsmodified;
332 printf("\n***** FILE SYSTEM MARKED %s *****\n",
333 markclean ? "CLEAN" : "DIRTY");
339 printf("\n***** FILE SYSTEM IS CLEAN *****\n");
341 printf("\n***** FILE SYSTEM STILL DIRTY *****\n");
345 if (debug && totalreads > 0)
346 printf("cache missed %ld of %ld (%d%%)\n", diskreads,
347 totalreads, (int)(diskreads * 100 / totalreads));
348 (void)close(fsreadfd);
349 (void)close(fswritefd);
353 blread(int fd, char *buf, ufs2_daddr_t blk, long size)
363 if (lseek(fd, offset, 0) < 0)
364 rwerror("SEEK BLK", blk);
365 else if (read(fd, buf, (int)size) == size) {
370 rwerror("READ BLK", blk);
371 if (lseek(fd, offset, 0) < 0)
372 rwerror("SEEK BLK", blk);
374 memset(buf, 0, (size_t)size);
375 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
376 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
377 if (read(fd, cp, (int)secsize) != secsize) {
378 (void)lseek(fd, offset + i + secsize, 0);
379 if (secsize != dev_bsize && dev_bsize != 1)
380 printf(" %jd (%jd),",
381 (intmax_t)(blk * dev_bsize + i) / secsize,
382 (intmax_t)blk + i / dev_bsize);
384 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
395 blwrite(int fd, char *buf, ufs2_daddr_t blk, long size)
405 if (lseek(fd, offset, 0) < 0)
406 rwerror("SEEK BLK", blk);
407 else if (write(fd, buf, (int)size) == size) {
412 rwerror("WRITE BLK", blk);
413 if (lseek(fd, offset, 0) < 0)
414 rwerror("SEEK BLK", blk);
415 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
416 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
417 if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
418 (void)lseek(fd, offset + i + dev_bsize, 0);
419 printf(" %jd,", (intmax_t)blk + i / dev_bsize);
426 blerase(int fd, ufs2_daddr_t blk, long size)
432 ioarg[0] = blk * dev_bsize;
434 ioctl(fd, DIOCGDELETE, ioarg);
435 /* we don't really care if we succeed or not */
440 * Verify cylinder group's magic number and other parameters. If the
441 * test fails, offer an option to rebuild the whole cylinder group.
444 check_cgmagic(int cg, struct cg *cgp)
448 * Extended cylinder group checks.
450 if (cg_chkmagic(cgp) &&
451 ((sblock.fs_magic == FS_UFS1_MAGIC &&
452 cgp->cg_old_niblk == sblock.fs_ipg &&
453 cgp->cg_ndblk <= sblock.fs_fpg &&
454 cgp->cg_old_ncyl <= sblock.fs_old_cpg) ||
455 (sblock.fs_magic == FS_UFS2_MAGIC &&
456 cgp->cg_niblk == sblock.fs_ipg &&
457 cgp->cg_ndblk <= sblock.fs_fpg &&
458 cgp->cg_initediblk <= sblock.fs_ipg))) {
461 pfatal("CYLINDER GROUP %d: BAD MAGIC NUMBER", cg);
462 if (!reply("REBUILD CYLINDER GROUP")) {
463 printf("YOU WILL NEED TO RERUN FSCK.\n");
468 * Zero out the cylinder group and then initialize critical fields.
469 * Bit maps and summaries will be recalculated by later passes.
471 memset(cgp, 0, (size_t)sblock.fs_cgsize);
472 cgp->cg_magic = CG_MAGIC;
474 cgp->cg_niblk = sblock.fs_ipg;
475 cgp->cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
476 sblock.fs_ipg : 2 * INOPB(&sblock);
477 if (cgbase(&sblock, cg) + sblock.fs_fpg < sblock.fs_size)
478 cgp->cg_ndblk = sblock.fs_fpg;
480 cgp->cg_ndblk = sblock.fs_size - cgbase(&sblock, cg);
481 cgp->cg_iusedoff = &cgp->cg_space[0] - (u_char *)(&cgp->cg_firstfield);
482 if (sblock.fs_magic == FS_UFS1_MAGIC) {
484 cgp->cg_initediblk = 0;
485 cgp->cg_old_ncyl = sblock.fs_old_cpg;
486 cgp->cg_old_niblk = sblock.fs_ipg;
487 cgp->cg_old_btotoff = cgp->cg_iusedoff;
488 cgp->cg_old_boff = cgp->cg_old_btotoff +
489 sblock.fs_old_cpg * sizeof(int32_t);
490 cgp->cg_iusedoff = cgp->cg_old_boff +
491 sblock.fs_old_cpg * sizeof(u_int16_t);
493 cgp->cg_freeoff = cgp->cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
494 cgp->cg_nextfreeoff = cgp->cg_freeoff + howmany(sblock.fs_fpg,CHAR_BIT);
495 if (sblock.fs_contigsumsize > 0) {
496 cgp->cg_nclusterblks = cgp->cg_ndblk / sblock.fs_frag;
497 cgp->cg_clustersumoff =
498 roundup(cgp->cg_nextfreeoff, sizeof(u_int32_t));
499 cgp->cg_clustersumoff -= sizeof(u_int32_t);
500 cgp->cg_clusteroff = cgp->cg_clustersumoff +
501 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
502 cgp->cg_nextfreeoff = cgp->cg_clusteroff +
503 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
510 * allocate a data block with the specified number of fragments
515 int i, j, k, cg, baseblk;
516 struct cg *cgp = &cgrp;
518 if (frags <= 0 || frags > sblock.fs_frag)
520 for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
521 for (j = 0; j <= sblock.fs_frag - frags; j++) {
524 for (k = 1; k < frags; k++)
525 if (testbmap(i + j + k))
531 cg = dtog(&sblock, i + j);
532 getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
533 if (!check_cgmagic(cg, cgp))
535 baseblk = dtogd(&sblock, i + j);
536 for (k = 0; k < frags; k++) {
538 clrbit(cg_blksfree(cgp), baseblk + k);
541 if (frags == sblock.fs_frag)
542 cgp->cg_cs.cs_nbfree--;
544 cgp->cg_cs.cs_nffree -= frags;
553 * Free a previously allocated block
556 freeblk(ufs2_daddr_t blkno, long frags)
558 struct inodesc idesc;
560 idesc.id_blkno = blkno;
561 idesc.id_numfrags = frags;
562 (void)pass4check(&idesc);
565 /* Slow down IO so as to leave some disk bandwidth for other processes */
570 /* Delay one in every 8 operations */
571 slowio_pollcnt = (slowio_pollcnt + 1) & 7;
572 if (slowio_pollcnt == 0) {
573 gettimeofday(&slowio_starttime, NULL);
583 if (slowio_pollcnt != 0)
586 /* Update the slowdown interval. */
587 gettimeofday(&tv, NULL);
588 delay_usec = (tv.tv_sec - slowio_starttime.tv_sec) * 1000000 +
589 (tv.tv_usec - slowio_starttime.tv_usec);
592 if (delay_usec > 2500000)
593 delay_usec = 2500000;
594 slowio_delay_usec = (slowio_delay_usec * 63 + delay_usec) >> 6;
595 /* delay by 8 times the average IO delay */
596 if (slowio_delay_usec > 64)
597 usleep(slowio_delay_usec * 8);
604 getpathname(char *namebuf, ino_t curdir, ino_t ino)
608 struct inodesc idesc;
611 if (curdir == ino && ino == ROOTINO) {
612 (void)strcpy(namebuf, "/");
615 if (busy || !INO_IS_DVALID(curdir)) {
616 (void)strcpy(namebuf, "?");
620 memset(&idesc, 0, sizeof(struct inodesc));
621 idesc.id_type = DATA;
622 idesc.id_fix = IGNORE;
623 cp = &namebuf[MAXPATHLEN - 1];
626 idesc.id_parent = curdir;
629 while (ino != ROOTINO) {
630 idesc.id_number = ino;
631 idesc.id_func = findino;
632 idesc.id_name = strdup("..");
633 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
636 idesc.id_number = idesc.id_parent;
637 idesc.id_parent = ino;
638 idesc.id_func = findname;
639 idesc.id_name = namebuf;
640 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
642 len = strlen(namebuf);
644 memmove(cp, namebuf, (size_t)len);
646 if (cp < &namebuf[MAXNAMLEN])
648 ino = idesc.id_number;
653 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
657 catch(int sig __unused)
665 * When preening, allow a single quit to signal
666 * a special exit after file system checks complete
667 * so that reboot sequence may be interrupted.
670 catchquit(int sig __unused)
672 printf("returning to single-user after file system check\n");
674 (void)signal(SIGQUIT, SIG_DFL);
678 * determine whether an inode should be fixed.
681 dofix(struct inodesc *idesc, const char *msg)
684 switch (idesc->id_fix) {
687 if (idesc->id_type == DATA)
688 direrror(idesc->id_number, msg);
692 printf(" (SALVAGED)\n");
696 if (reply("SALVAGE") == 0) {
697 idesc->id_fix = NOFIX;
711 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix);
720 * An unexpected inconsistency occured.
721 * Die if preening or file system is running with soft dependency protocol,
722 * otherwise just print message and continue.
725 pfatal(const char *fmt, ...)
730 (void)vfprintf(stdout, fmt, ap);
733 (void)fprintf(stdout,
734 "\nUNEXPECTED SOFT UPDATE INCONSISTENCY\n");
736 * Force foreground fsck to clean up inconsistency.
739 cmd.value = FS_NEEDSFSCK;
741 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
742 &cmd, sizeof cmd) == -1)
743 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
744 fprintf(stdout, "CANNOT RUN IN BACKGROUND\n");
750 if (cdevname == NULL)
751 cdevname = strdup("fsck");
752 (void)fprintf(stdout, "%s: ", cdevname);
753 (void)vfprintf(stdout, fmt, ap);
754 (void)fprintf(stdout,
755 "\n%s: UNEXPECTED%sINCONSISTENCY; RUN fsck MANUALLY.\n",
756 cdevname, usedsoftdep ? " SOFT UPDATE " : " ");
758 * Force foreground fsck to clean up inconsistency.
761 cmd.value = FS_NEEDSFSCK;
763 if (sysctlbyname("vfs.ffs.setflags", 0, 0,
764 &cmd, sizeof cmd) == -1)
765 pwarn("CANNOT SET FS_NEEDSFSCK FLAG\n");
772 * Pwarn just prints a message when not preening or running soft dependency
773 * protocol, or a warning (preceded by filename) when preening.
776 pwarn(const char *fmt, ...)
781 (void)fprintf(stdout, "%s: ", cdevname);
782 (void)vfprintf(stdout, fmt, ap);
787 * Stub for routines from kernel.
790 panic(const char *fmt, ...)
794 pfatal("INTERNAL INCONSISTENCY:");
795 (void)vfprintf(stdout, fmt, ap);