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- /*
- * Copyright (c) 1980, 1986 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)utilities.c 5.30 (Berkeley) 7/26/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <ufs/dinode.h>
- #include <ufs/fs.h>
- #include <ufs/dir.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include "fsck.h"
-
- long diskreads, totalreads; /* Disk cache statistics */
- long lseek();
-
- ftypeok(dp)
- struct dinode *dp;
- {
- switch (dp->di_mode & IFMT) {
-
- case IFDIR:
- case IFREG:
- case IFBLK:
- case IFCHR:
- case IFLNK:
- case IFSOCK:
- case IFIFO:
- return (1);
-
- default:
- if (debug)
- printf("bad file type 0%o\n", dp->di_mode);
- return (0);
- }
- }
-
- reply(question)
- char *question;
- {
- int persevere;
- char c;
-
- if (preen)
- pfatal("INTERNAL ERROR: GOT TO reply()");
- persevere = !strcmp(question, "CONTINUE");
- printf("\n");
- if (!persevere && (nflag || fswritefd < 0)) {
- printf("%s? no\n\n", question);
- return (0);
- }
- if (yflag || (persevere && nflag)) {
- printf("%s? yes\n\n", question);
- return (1);
- }
- do {
- printf("%s? [yn] ", question);
- (void) fflush(stdout);
- c = getc(stdin);
- while (c != '\n' && getc(stdin) != '\n')
- if (feof(stdin))
- return (0);
- } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
- printf("\n");
- if (c == 'y' || c == 'Y')
- return (1);
- return (0);
- }
-
- /*
- * Malloc buffers and set up cache.
- */
- bufinit()
- {
- register struct bufarea *bp;
- long bufcnt, i;
- char *bufp;
-
- pbp = pdirbp = (struct bufarea *)0;
- bufp = malloc((unsigned int)sblock.fs_bsize);
- if (bufp == 0)
- errexit("cannot allocate buffer pool\n");
- cgblk.b_un.b_buf = bufp;
- initbarea(&cgblk);
- bufhead.b_next = bufhead.b_prev = &bufhead;
- bufcnt = MAXBUFSPACE / sblock.fs_bsize;
- if (bufcnt < MINBUFS)
- bufcnt = MINBUFS;
- for (i = 0; i < bufcnt; i++) {
- bp = (struct bufarea *)malloc(sizeof(struct bufarea));
- bufp = malloc((unsigned int)sblock.fs_bsize);
- if (bp == NULL || bufp == NULL) {
- if (i >= MINBUFS)
- break;
- errexit("cannot allocate buffer pool\n");
- }
- bp->b_un.b_buf = bufp;
- bp->b_prev = &bufhead;
- bp->b_next = bufhead.b_next;
- bufhead.b_next->b_prev = bp;
- bufhead.b_next = bp;
- initbarea(bp);
- }
- bufhead.b_size = i; /* save number of buffers */
- }
-
- /*
- * Manage a cache of directory blocks.
- */
- struct bufarea *
- getdatablk(blkno, size)
- daddr_t blkno;
- long size;
- {
- register struct bufarea *bp;
-
- for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
- if (bp->b_bno == fsbtodb(&sblock, blkno))
- goto foundit;
- for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
- if ((bp->b_flags & B_INUSE) == 0)
- break;
- if (bp == &bufhead)
- errexit("deadlocked buffer pool\n");
- getblk(bp, blkno, size);
- /* fall through */
- foundit:
- totalreads++;
- bp->b_prev->b_next = bp->b_next;
- bp->b_next->b_prev = bp->b_prev;
- bp->b_prev = &bufhead;
- bp->b_next = bufhead.b_next;
- bufhead.b_next->b_prev = bp;
- bufhead.b_next = bp;
- bp->b_flags |= B_INUSE;
- return (bp);
- }
-
- void
- getblk(bp, blk, size)
- register struct bufarea *bp;
- daddr_t blk;
- long size;
- {
- daddr_t dblk;
-
- dblk = fsbtodb(&sblock, blk);
- if (bp->b_bno != dblk) {
- flush(fswritefd, bp);
- diskreads++;
- bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
- bp->b_bno = dblk;
- bp->b_size = size;
- }
- }
-
- flush(fd, bp)
- int fd;
- register struct bufarea *bp;
- {
- register int i, j;
-
- if (!bp->b_dirty)
- return;
- if (bp->b_errs != 0)
- pfatal("WRITING %sZERO'ED BLOCK %d TO DISK\n",
- (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
- bp->b_bno);
- bp->b_dirty = 0;
- bp->b_errs = 0;
- bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
- if (bp != &sblk)
- return;
- for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
- bwrite(fswritefd, (char *)sblock.fs_csp[j],
- fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
- sblock.fs_cssize - i < sblock.fs_bsize ?
- sblock.fs_cssize - i : sblock.fs_bsize);
- }
- }
-
- rwerror(mesg, blk)
- char *mesg;
- daddr_t blk;
- {
-
- if (preen == 0)
- printf("\n");
- pfatal("CANNOT %s: BLK %ld", mesg, blk);
- if (reply("CONTINUE") == 0)
- errexit("Program terminated\n");
- }
-
- ckfini()
- {
- register struct bufarea *bp, *nbp;
- int cnt = 0;
-
- flush(fswritefd, &sblk);
- if (havesb && sblk.b_bno != SBOFF / dev_bsize &&
- !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
- sblk.b_bno = SBOFF / dev_bsize;
- sbdirty();
- flush(fswritefd, &sblk);
- }
- flush(fswritefd, &cgblk);
- free(cgblk.b_un.b_buf);
- for (bp = bufhead.b_prev; bp != &bufhead; bp = nbp) {
- cnt++;
- flush(fswritefd, bp);
- nbp = bp->b_prev;
- free(bp->b_un.b_buf);
- free((char *)bp);
- }
- if (bufhead.b_size != cnt)
- errexit("Panic: lost %d buffers\n", bufhead.b_size - cnt);
- pbp = pdirbp = (struct bufarea *)0;
- if (debug)
- printf("cache missed %ld of %ld (%d%%)\n", diskreads,
- totalreads, (int)(diskreads * 100 / totalreads));
- (void)close(fsreadfd);
- (void)close(fswritefd);
- }
-
- bread(fd, buf, blk, size)
- int fd;
- char *buf;
- daddr_t blk;
- long size;
- {
- char *cp;
- int i, errs;
-
- if (lseek(fd, blk * dev_bsize, 0) < 0)
- rwerror("SEEK", blk);
- else if (read(fd, buf, (int)size) == size)
- return (0);
- rwerror("READ", blk);
- if (lseek(fd, blk * dev_bsize, 0) < 0)
- rwerror("SEEK", blk);
- errs = 0;
- bzero(buf, (size_t)size);
- printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
- for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
- if (read(fd, cp, (int)secsize) != secsize) {
- (void)lseek(fd, blk * dev_bsize + i + secsize, 0);
- if (secsize != dev_bsize && dev_bsize != 1)
- printf(" %ld (%ld),",
- (blk * dev_bsize + i) / secsize,
- blk + i / dev_bsize);
- else
- printf(" %ld,", blk + i / dev_bsize);
- errs++;
- }
- }
- printf("\n");
- return (errs);
- }
-
- bwrite(fd, buf, blk, size)
- int fd;
- char *buf;
- daddr_t blk;
- long size;
- {
- int i;
- char *cp;
-
- if (fd < 0)
- return;
- if (lseek(fd, blk * dev_bsize, 0) < 0)
- rwerror("SEEK", blk);
- else if (write(fd, buf, (int)size) == size) {
- fsmodified = 1;
- return;
- }
- rwerror("WRITE", blk);
- if (lseek(fd, blk * dev_bsize, 0) < 0)
- rwerror("SEEK", blk);
- printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
- for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
- if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
- (void)lseek(fd, blk * dev_bsize + i + dev_bsize, 0);
- printf(" %ld,", blk + i / dev_bsize);
- }
- printf("\n");
- return;
- }
-
- /*
- * allocate a data block with the specified number of fragments
- */
- allocblk(frags)
- long frags;
- {
- register int i, j, k;
-
- if (frags <= 0 || frags > sblock.fs_frag)
- return (0);
- for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
- for (j = 0; j <= sblock.fs_frag - frags; j++) {
- if (testbmap(i + j))
- continue;
- for (k = 1; k < frags; k++)
- if (testbmap(i + j + k))
- break;
- if (k < frags) {
- j += k;
- continue;
- }
- for (k = 0; k < frags; k++)
- setbmap(i + j + k);
- n_blks += frags;
- return (i + j);
- }
- }
- return (0);
- }
-
- /*
- * Free a previously allocated block
- */
- freeblk(blkno, frags)
- daddr_t blkno;
- long frags;
- {
- struct inodesc idesc;
-
- idesc.id_blkno = blkno;
- idesc.id_numfrags = frags;
- (void)pass4check(&idesc);
- }
-
- /*
- * Find a pathname
- */
- getpathname(namebuf, curdir, ino)
- char *namebuf;
- ino_t curdir, ino;
- {
- int len;
- register char *cp;
- struct inodesc idesc;
- static int busy = 0;
- extern int findname();
-
- if (busy ||
- (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) {
- (void)strcpy(namebuf, "?");
- return;
- }
- busy = 1;
- bzero((char *)&idesc, sizeof(struct inodesc));
- idesc.id_type = DATA;
- idesc.id_fix = IGNORE;
- cp = &namebuf[MAXPATHLEN - 1];
- *cp = '\0';
- if (curdir != ino) {
- idesc.id_parent = curdir;
- goto namelookup;
- }
- while (ino != ROOTINO) {
- idesc.id_number = ino;
- idesc.id_func = findino;
- idesc.id_name = "..";
- if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
- break;
- namelookup:
- idesc.id_number = idesc.id_parent;
- idesc.id_parent = ino;
- idesc.id_func = findname;
- idesc.id_name = namebuf;
- if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
- break;
- len = strlen(namebuf);
- cp -= len;
- bcopy(namebuf, cp, (size_t)len);
- *--cp = '/';
- if (cp < &namebuf[MAXNAMLEN])
- break;
- ino = idesc.id_number;
- }
- busy = 0;
- if (ino != ROOTINO)
- *--cp = '?';
- bcopy(cp, namebuf, (size_t)(&namebuf[MAXPATHLEN] - cp));
- }
-
- void
- catch()
- {
- ckfini();
- exit(12);
- }
-
- /*
- * When preening, allow a single quit to signal
- * a special exit after filesystem checks complete
- * so that reboot sequence may be interrupted.
- */
- void
- catchquit()
- {
- extern returntosingle;
-
- printf("returning to single-user after filesystem check\n");
- returntosingle = 1;
- (void)signal(SIGQUIT, SIG_DFL);
- }
-
- /*
- * Ignore a single quit signal; wait and flush just in case.
- * Used by child processes in preen.
- */
- void
- voidquit()
- {
-
- sleep(1);
- (void)signal(SIGQUIT, SIG_IGN);
- (void)signal(SIGQUIT, SIG_DFL);
- }
-
- /*
- * determine whether an inode should be fixed.
- */
- dofix(idesc, msg)
- register struct inodesc *idesc;
- char *msg;
- {
-
- switch (idesc->id_fix) {
-
- case DONTKNOW:
- if (idesc->id_type == DATA)
- direrror(idesc->id_number, msg);
- else
- pwarn(msg);
- if (preen) {
- printf(" (SALVAGED)\n");
- idesc->id_fix = FIX;
- return (ALTERED);
- }
- if (reply("SALVAGE") == 0) {
- idesc->id_fix = NOFIX;
- return (0);
- }
- idesc->id_fix = FIX;
- return (ALTERED);
-
- case FIX:
- return (ALTERED);
-
- case NOFIX:
- case IGNORE:
- return (0);
-
- default:
- errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
- }
- /* NOTREACHED */
- }
-
- /* VARARGS1 */
- errexit(s1, s2, s3, s4)
- char *s1;
- {
- printf(s1, s2, s3, s4);
- exit(8);
- }
-
- /*
- * An unexpected inconsistency occured.
- * Die if preening, otherwise just print message and continue.
- */
- /* VARARGS1 */
- pfatal(s, a1, a2, a3)
- char *s;
- {
-
- if (preen) {
- printf("%s: ", devname);
- printf(s, a1, a2, a3);
- printf("\n");
- printf("%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n",
- devname);
- exit(8);
- }
- printf(s, a1, a2, a3);
- }
-
- /*
- * Pwarn just prints a message when not preening,
- * or a warning (preceded by filename) when preening.
- */
- /* VARARGS1 */
- pwarn(s, a1, a2, a3, a4, a5, a6)
- char *s;
- {
-
- if (preen)
- printf("%s: ", devname);
- printf(s, a1, a2, a3, a4, a5, a6);
- }
-
- #ifndef lint
- /*
- * Stub for routines from kernel.
- */
- panic(s)
- char *s;
- {
-
- pfatal("INTERNAL INCONSISTENCY:");
- errexit(s);
- }
- #endif
-