X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/555d7baf19ec4ba962f9870e07125f814cea4631..38eccf8b24b7130969a52a50874dd1224152de11:/usr/src/sbin/fsck/setup.c diff --git a/usr/src/sbin/fsck/setup.c b/usr/src/sbin/fsck/setup.c index 88ddbdbc2d..df94dfb5ce 100644 --- a/usr/src/sbin/fsck/setup.c +++ b/usr/src/sbin/fsck/setup.c @@ -5,32 +5,43 @@ */ #ifndef lint -static char sccsid[] = "@(#)setup.c 5.2 (Berkeley) %G%"; +static char sccsid[] = "@(#)setup.c 5.19 (Berkeley) %G%"; #endif not lint +#define DKTYPENAMES #include #include #include #include +#include +#include +#include +#include +#include #include "fsck.h" +BUFAREA asblk; +#define altsblock (*asblk.b_un.b_fs) +#define POWEROF2(num) (((num) & ((num) - 1)) == 0) + char *calloc(); +char *index(); setup(dev) char *dev; { dev_t rootdev; + long cg, ncg, size, asked, i, j; + struct disklabel *getdisklabel(), *lp; struct stat statb; - daddr_t super = bflag ? bflag : SBLOCK; - int i, j; - long size; - BUFAREA asblk; -# define altsblock asblk.b_un.b_fs + struct fs proto; + havesb = 0; if (stat("/", &statb) < 0) errexit("Can't stat root\n"); rootdev = statb.st_dev; if (stat(dev, &statb) < 0) { + perror(dev); printf("Can't stat %s\n", dev); return (0); } @@ -45,13 +56,14 @@ setup(dev) } if (rootdev == statb.st_rdev) hotroot++; - if ((dfile.rfdes = open(dev, 0)) < 0) { + if ((dfile.rfdes = open(dev, O_RDONLY)) < 0) { + perror(dev); printf("Can't open %s\n", dev); return (0); } if (preen == 0) printf("** %s", dev); - if (nflag || (dfile.wfdes = open(dev, 1)) < 0) { + if (nflag || (dfile.wfdes = open(dev, O_WRONLY)) < 0) { dfile.wfdes = -1; if (preen) pfatal("NO WRITE ACCESS"); @@ -62,13 +74,188 @@ setup(dev) dfile.mod = 0; lfdir = 0; initbarea(&sblk); - initbarea(&fileblk); - initbarea(&inoblk); - initbarea(&cgblk); initbarea(&asblk); + sblk.b_un.b_buf = (char *)malloc(SBSIZE); + asblk.b_un.b_buf = (char *)malloc(SBSIZE); + if (sblk.b_un.b_buf == 0 || asblk.b_un.b_buf == 0) + errexit("cannot allocate space for superblock\n"); + if (lp = getdisklabel((char *)NULL, dfile.rfdes)) + dev_bsize = secsize = lp->d_secsize; + else + dev_bsize = secsize = DEV_BSIZE; + /* + * Read in the superblock, looking for alternates if necessary + */ + if (readsb(1) == 0) { + if (bflag || preen || calcsb(dev, dfile.rfdes, &proto) == 0) + return(0); + if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) + return (0); + for (cg = 0; cg < proto.fs_ncg; cg++) { + bflag = fsbtodb(&proto, cgsblock(&proto, cg)); + if (readsb(0) != 0) + break; + } + if (cg >= proto.fs_ncg) { + printf("%s %s\n%s %s\n%s %s\n", + "SEARCH FOR ALTERNATE SUPER-BLOCK", + "FAILED. YOU MUST USE THE", + "-b OPTION TO FSCK TO SPECIFY THE", + "LOCATION OF AN ALTERNATE", + "SUPER-BLOCK TO SUPPLY NEEDED", + "INFORMATION; SEE fsck(8)."); + return(0); + } + pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); + } + fmax = sblock.fs_size; + imax = sblock.fs_ncg * sblock.fs_ipg; + /* + * Check and potentially fix certain fields in the super block. + */ + if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { + pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); + if (reply("SET TO DEFAULT") == 1) { + sblock.fs_optim = FS_OPTTIME; + sbdirty(); + } + } + if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { + pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", + sblock.fs_minfree); + if (reply("SET TO DEFAULT") == 1) { + sblock.fs_minfree = 10; + sbdirty(); + } + } + if (sblock.fs_interleave < 1) { + sblock.fs_interleave); + sblock.fs_interleave = 1; + sbdirty(); + dirty(&asblk); + } + } + if (sblock.fs_npsect < sblock.fs_nsect) { + sblock.fs_npsect); + sblock.fs_npsect = sblock.fs_nsect; + sbdirty(); + dirty(&asblk); + } + } + if (cvtflag) { + if (sblock.fs_postblformat == FS_42POSTBLFMT) { + /* + * Requested to convert from old format to new format + */ + if (preen) + pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); + else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) + return(0); + sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; + sblock.fs_nrpos = 8; + sblock.fs_postbloff = + (char *)(&sblock.fs_opostbl[0][0]) - + (char *)(&sblock.fs_link); + sblock.fs_rotbloff = &sblock.fs_space[0] - + (u_char *)(&sblock.fs_link); + /* + * Planning now for future expansion. + */ +# if (BYTE_ORDER == BIG_ENDIAN) + sblock.fs_qbmask.val[0] = 0; + sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; + sblock.fs_qfmask.val[0] = 0; + sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; +# endif /* BIG_ENDIAN */ +# if (BYTE_ORDER == LITTLE_ENDIAN) + sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; + sblock.fs_qbmask.val[1] = 0; + sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; + sblock.fs_qfmask.val[1] = 0; +# endif /* LITTLE_ENDIAN */ + sbdirty(); + dirty(&asblk); + } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { + /* + * Requested to convert from new format to old format + */ + if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || + sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { + printf( + "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); + errexit( + "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); + } + if (preen) + pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); + else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) + return(0); + sblock.fs_postblformat = FS_42POSTBLFMT; + sbdirty(); + dirty(&asblk); + } else { + errexit("UNKNOWN FILE SYSTEM FORMAT\n"); + } + } + if (asblk.b_dirty) { + bcopy((char *)&sblock, (char *)&altsblock, sblock.fs_sbsize); + flush(&dfile, &asblk); + } + /* + * read in the summary info. + */ + asked = 0; + for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { + size = sblock.fs_cssize - i < sblock.fs_bsize ? + sblock.fs_cssize - i : sblock.fs_bsize; + sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); + if (bread(&dfile, (char *)sblock.fs_csp[j], + fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), + size) != 0 && !asked) { + pfatal("BAD SUMMARY INFORMATION"); + if (reply("CONTINUE") == 0) + errexit(""); + asked++; + } + } /* - * Read in the super block and its summary info. + * allocate and initialize the necessary maps */ + bmapsz = roundup(howmany(fmax, NBBY), sizeof(short)); + blockmap = calloc((unsigned)bmapsz, sizeof (char)); + if (blockmap == NULL) { + printf("cannot alloc %d bytes for blockmap\n", bmapsz); + goto badsb; + } + statemap = calloc((unsigned)(imax + 1), sizeof(char)); + if (statemap == NULL) { + printf("cannot alloc %d bytes for statemap\n", imax + 1); + goto badsb; + } + lncntp = (short *)calloc((unsigned)(imax + 1), sizeof(short)); + if (lncntp == NULL) { + printf("cannot alloc %d bytes for lncntp\n", + (imax + 1) * sizeof(short)); + goto badsb; + } + + bufinit(); + return (1); + +badsb: + ckfini(); + return (0); +} + +/* + * Read in the super block and its summary info. + */ +readsb(listerr) + int listerr; +{ + off_t sboff; + daddr_t super = bflag ? bflag : SBOFF / dev_bsize; + if (bread(&dfile, (char *)&sblock, super, (long)SBSIZE) != 0) return (0); sblk.b_bno = super; @@ -77,26 +264,36 @@ setup(dev) * run a few consistency checks of the super block */ if (sblock.fs_magic != FS_MAGIC) - { badsb("MAGIC NUMBER WRONG"); return (0); } + { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } if (sblock.fs_ncg < 1) - { badsb("NCG OUT OF RANGE"); return (0); } - if (sblock.fs_cpg < 1 || sblock.fs_cpg > MAXCPG) - { badsb("CPG OUT OF RANGE"); return (0); } + { badsb(listerr, "NCG OUT OF RANGE"); return (0); } + if (sblock.fs_cpg < 1) + { badsb(listerr, "CPG OUT OF RANGE"); return (0); } if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) - { badsb("NCYL DOES NOT JIVE WITH NCG*CPG"); return (0); } + { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } if (sblock.fs_sbsize > SBSIZE) - { badsb("SIZE PREPOSTEROUSLY LARGE"); return (0); } + { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } + /* + * Compute block size that the filesystem is based on, + * according to fsbtodb, and adjust superblock block number + * so we can tell if this is an alternate later. + */ + super *= dev_bsize; + dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); + sblk.b_bno = super / dev_bsize; /* * Set all possible fields that could differ, then do check * of whole super block against an alternate super block. * When an alternate super-block is specified this check is skipped. */ - if (bflag) - goto sbok; getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); if (asblk.b_errs != NULL) return (0); + if (bflag) { + havesb = 1; + return (1); + } altsblock.fs_link = sblock.fs_link; altsblock.fs_rlink = sblock.fs_rlink; altsblock.fs_time = sblock.fs_time; @@ -115,59 +312,109 @@ setup(dev) sizeof sblock.fs_csp); bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, sizeof sblock.fs_fsmnt); - if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) - { badsb("TRASHED VALUES IN SUPER BLOCK"); return (0); } -sbok: - fmax = sblock.fs_size; - imax = sblock.fs_ncg * sblock.fs_ipg; - /* - * read in the summary info. - */ - for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { - size = sblock.fs_cssize - i < sblock.fs_bsize ? - sblock.fs_cssize - i : sblock.fs_bsize; - sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); - if (bread(&dfile, (char *)sblock.fs_csp[j], - fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), - size) != 0) - return (0); - } + bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, + sizeof sblock.fs_sparecon); /* - * allocate and initialize the necessary maps + * The following should not have to be copied. */ - bmapsz = roundup(howmany(fmax, NBBY), sizeof(short)); - blockmap = calloc((unsigned)bmapsz, sizeof (char)); - if (blockmap == NULL) { - printf("cannot alloc %d bytes for blockmap\n", bmapsz); - goto badsb; - } - statemap = calloc((unsigned)(imax + 1), sizeof(char)); - if (statemap == NULL) { - printf("cannot alloc %d bytes for statemap\n", imax + 1); - goto badsb; - } - lncntp = (short *)calloc((unsigned)(imax + 1), sizeof(short)); - if (lncntp == NULL) { - printf("cannot alloc %d bytes for lncntp\n", - (imax + 1) * sizeof(short)); - goto badsb; + altsblock.fs_fsbtodb = sblock.fs_fsbtodb; + altsblock.fs_interleave = sblock.fs_interleave; + altsblock.fs_npsect = sblock.fs_npsect; + altsblock.fs_nrpos = sblock.fs_nrpos; + if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { + badsb(listerr, + "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); + return (0); } - + havesb = 1; return (1); - -badsb: - ckfini(); - return (0); -# undef altsblock } -badsb(s) +badsb(listerr, s) + int listerr; char *s; { + if (!listerr) + return; if (preen) printf("%s: ", devname); - printf("BAD SUPER BLOCK: %s\n", s); - pwarn("USE -b OPTION TO FSCK TO SPECIFY LOCATION OF AN ALTERNATE\n"); - pfatal("SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(8).\n"); + pfatal("BAD SUPER BLOCK: %s\n", s); +} + +/* + * Calculate a prototype superblock based on information in the disk label. + * When done the cgsblock macro can be calculated and the fs_ncg field + * can be used. Do NOT attempt to use other macros without verifying that + * their needed information is available! + */ +calcsb(dev, devfd, fs) + char *dev; + int devfd; + register struct fs *fs; +{ + register struct disklabel *lp; + register struct partition *pp; + register char *cp; + int i; + struct disklabel *getdisklabel(); + + cp = index(dev, '\0') - 1; + if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { + pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); + return (0); + } + lp = getdisklabel(dev, devfd); + if (isdigit(*cp)) + pp = &lp->d_partitions[0]; + else + pp = &lp->d_partitions[*cp - 'a']; + if (pp->p_fstype != FS_BSDFFS) { + pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", + dev, pp->p_fstype < FSMAXTYPES ? + fstypenames[pp->p_fstype] : "unknown"); + return (0); + } + bzero(fs, sizeof(struct fs)); + fs->fs_fsize = pp->p_fsize; + fs->fs_frag = pp->p_frag; + fs->fs_cpg = pp->p_cpg; + fs->fs_size = pp->p_size; + fs->fs_ntrak = lp->d_ntracks; + fs->fs_nsect = lp->d_nsectors; + fs->fs_spc = lp->d_secpercyl; + fs->fs_nspf = fs->fs_fsize / lp->d_secsize; + fs->fs_sblkno = roundup( + howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), + fs->fs_frag); + fs->fs_cgmask = 0xffffffff; + for (i = fs->fs_ntrak; i > 1; i >>= 1) + fs->fs_cgmask <<= 1; + if (!POWEROF2(fs->fs_ntrak)) + fs->fs_cgmask <<= 1; + fs->fs_cgoffset = roundup( + howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); + fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); + fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); + for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) + fs->fs_fsbtodb++; + dev_bsize = lp->d_secsize; + return (1); +} + +struct disklabel * +getdisklabel(s, fd) + char *s; + int fd; +{ + static struct disklabel lab; + + if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { + if (s == NULL) + return ((struct disklabel *)NULL); + pwarn(""); + perror("ioctl (GDINFO)"); + errexit("%s: can't read disk label", s); + } + return (&lab); }