Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
5a8c043bd9
NetBSD/sbin/fsck_ffs/setup.c
dbj 43395bd5a8 Add support for the Apple UFS variation on ffs 
This is the bulk of PR #17345

The general approach is to use a run time deteriminable value
for DIRBLKSIZ.  Additional allowances are included for using
MAXSYMLINKLEN with FS_42INODEFMT and a shift in the cylinder group
cluster summary count array.  Support is added for managing
the Apple UFS volume label.
2002-09-28 20:11:05 +00:00

863 lines
24 KiB
C
Raw Blame History

/* $NetBSD: setup.c,v 1.54 2002/09/28 20:11:06 dbj Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
#else
__RCSID("$NetBSD: setup.c,v 1.54 2002/09/28 20:11:06 dbj Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#define FSTYPENAMES
#include <sys/disklabel.h>
#include <sys/file.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_bswap.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "fsck.h"
#include "extern.h"
#include "fsutil.h"
#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
static void badsb __P((int, char *));
static int calcsb __P((const char *, int, struct fs *));
static struct disklabel *getdisklabel __P((const char *, int));
static struct partition *getdisklabelpart __P((const char *, struct disklabel *));
static int readsb __P((int));
static int readappleufs __P((void));
/*
* Read in a superblock finding an alternate if necessary.
* Return 1 if successful, 0 if unsuccessful, -1 if filesystem
* is already clean (preen mode only).
*/
int
setup(dev)
const char *dev;
{
long cg, size, asked, i, j;
long bmapsize;
struct disklabel *lp;
off_t sizepb;
struct stat statb;
struct fs proto;
int doskipclean;
u_int64_t maxfilesize;
struct csum *ccsp;
havesb = 0;
fswritefd = -1;
doskipclean = skipclean;
if (stat(dev, &statb) < 0) {
printf("Can't stat %s: %s\n", dev, strerror(errno));
return (0);
}
if (!forceimage && !S_ISCHR(statb.st_mode)) {
pfatal("%s is not a character device", dev);
if (reply("CONTINUE") == 0)
return (0);
}
if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
printf("Can't open %s: %s\n", dev, strerror(errno));
return (0);
}
if (preen == 0)
printf("** %s", dev);
if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
fswritefd = -1;
if (preen)
pfatal("NO WRITE ACCESS");
printf(" (NO WRITE)");
}
if (preen == 0)
printf("\n");
fsmodified = 0;
lfdir = 0;
initbarea(&sblk);
initbarea(&asblk);
sblk.b_un.b_buf = malloc(SBSIZE);
sblock = malloc(SBSIZE);
asblk.b_un.b_buf = malloc(SBSIZE);
altsblock = malloc(SBSIZE);
if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL ||
sblock == NULL || altsblock == NULL)
errx(EEXIT, "cannot allocate space for superblock");
if (!forceimage && (lp = getdisklabel(NULL, fsreadfd)) != NULL)
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 || forceimage ||
calcsb(dev, fsreadfd, &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_ffs TO SPECIFY THE",
"LOCATION OF AN ALTERNATE",
"SUPER-BLOCK TO SUPPLY NEEDED",
"INFORMATION; SEE fsck_ffs(8).");
return(0);
}
doskipclean = 0;
pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
}
if (debug)
printf("clean = %d\n", sblock->fs_clean);
if (doswap)
doskipclean = 0;
if (sblock->fs_clean & FS_ISCLEAN) {
if (doskipclean) {
pwarn("%sile system is clean; not checking\n",
preen ? "f" : "** F");
return (-1);
}
if (!preen && !doswap)
pwarn("** File system is already clean\n");
}
maxfsblock = sblock->fs_size;
maxino = sblock->fs_ncg * sblock->fs_ipg;
sizepb = sblock->fs_bsize;
maxfilesize = sblock->fs_bsize * NDADDR - 1;
for (i = 0; i < NIADDR; i++) {
sizepb *= NINDIR(sblock);
maxfilesize += sizepb;
}
/*
* 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_postblformat != FS_42POSTBLFMT &&
(sblock->fs_interleave < 1 ||
sblock->fs_interleave > sblock->fs_nsect)) {
pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
sblock->fs_interleave);
sblock->fs_interleave = 1;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("SET TO DEFAULT") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_postblformat != FS_42POSTBLFMT &&
(sblock->fs_npsect < sblock->fs_nsect ||
sblock->fs_npsect > sblock->fs_nsect*2)) {
pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
sblock->fs_npsect);
sblock->fs_npsect = sblock->fs_nsect;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("SET TO DEFAULT") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) {
pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK",
sblock->fs_bmask);
sblock->fs_bmask = ~(sblock->fs_bsize - 1);
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) {
pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK",
sblock->fs_fmask);
sblock->fs_fmask = ~(sblock->fs_fsize - 1);
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_inodefmt >= FS_44INODEFMT) {
if (sblock->fs_maxfilesize != maxfilesize) {
pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK",
(unsigned long long)sblock->fs_maxfilesize);
sblock->fs_maxfilesize = maxfilesize;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) {
pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK",
sblock->fs_maxsymlinklen);
sblock->fs_maxsymlinklen = MAXSYMLINKLEN;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_qbmask != ~sblock->fs_bmask) {
pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK",
(unsigned long long)sblock->fs_qbmask);
sblock->fs_qbmask = ~sblock->fs_bmask;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock->fs_qfmask != ~sblock->fs_fmask) {
pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK",
(unsigned long long)sblock->fs_qfmask);
sblock->fs_qfmask = ~sblock->fs_fmask;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
newinofmt = 1;
} else {
sblock->fs_qbmask = ~sblock->fs_bmask;
sblock->fs_qfmask = ~sblock->fs_fmask;
newinofmt = 0;
}
/*
* Convert to new inode format.
*/
if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) {
if (preen)
pwarn("CONVERTING TO NEW INODE FORMAT\n");
else if (!reply("CONVERT TO NEW INODE FORMAT"))
return(0);
doinglevel2++;
sblock->fs_inodefmt = FS_44INODEFMT;
sblock->fs_maxfilesize = maxfilesize;
sblock->fs_maxsymlinklen = MAXSYMLINKLEN;
sblock->fs_qbmask = ~sblock->fs_bmask;
sblock->fs_qfmask = ~sblock->fs_fmask;
sbdirty();
dirty(&asblk);
}
/*
* Convert to new cylinder group format.
*/
if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) {
if (preen)
pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
return(0);
doinglevel1++;
sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT;
sblock->fs_nrpos = 8;
if (sblock->fs_npsect < sblock->fs_nsect)
sblock->fs_npsect = sblock->fs_nsect;
if (sblock->fs_interleave < 1)
sblock->fs_interleave = 1;
sblock->fs_postbloff =
(char *)(&sblock->fs_opostbl[0][0]) -
(char *)(&sblock->fs_firstfield);
sblock->fs_rotbloff = &sblock->fs_space[0] -
(u_char *)(&sblock->fs_firstfield);
sblock->fs_cgsize =
fragroundup(sblock, CGSIZE(sblock));
sbdirty();
dirty(&asblk);
}
if (asblk.b_dirty && !bflag) {
memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE);
if (needswap)
ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs);
memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize);
flush(fswritefd, &asblk);
}
/*
* read in the summary info.
*/
asked = 0;
sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize);
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;
ccsp = (struct csum *)((char *)sblock->fs_csp + i);
if (bread(fsreadfd, (char *)ccsp,
fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag),
size) != 0 && !asked) {
pfatal("BAD SUMMARY INFORMATION");
if (reply("CONTINUE") == 0) {
markclean = 0;
exit(EEXIT);
}
asked++;
}
if (doswap) {
ffs_csum_swap(ccsp, ccsp, size);
bwrite(fswritefd, (char *)ccsp,
fsbtodb(sblock,
sblock->fs_csaddr + j * sblock->fs_frag),
size);
}
if (needswap)
ffs_csum_swap(ccsp, ccsp, size);
}
/*
* allocate and initialize the necessary maps
*/
bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t));
blockmap = calloc((unsigned)bmapsize, sizeof (char));
if (blockmap == NULL) {
printf("cannot alloc %u bytes for blockmap\n",
(unsigned)bmapsize);
goto badsblabel;
}
statemap = calloc((unsigned)(maxino + 1), sizeof(char));
if (statemap == NULL) {
printf("cannot alloc %u bytes for statemap\n",
(unsigned)(maxino + 1));
goto badsblabel;
}
typemap = calloc((unsigned)(maxino + 1), sizeof(char));
if (typemap == NULL) {
printf("cannot alloc %u bytes for typemap\n",
(unsigned)(maxino + 1));
goto badsblabel;
}
lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t));
if (lncntp == NULL) {
printf("cannot alloc %u bytes for lncntp\n",
(unsigned)((maxino + 1) * sizeof(int16_t)));
goto badsblabel;
}
/*
* cs_ndir may be inaccurate, particularly if we're using the -b
* option, so set a minimum to prevent bogus subdirectory reconnects
* and really inefficient directory scans.
* Also set a maximum in case the value is too large.
*/
numdirs = sblock->fs_cstotal.cs_ndir;
if (numdirs < 1024)
numdirs = 1024;
if (numdirs > maxino + 1)
numdirs = maxino + 1;
inplast = 0;
listmax = numdirs + 10;
inpsort = (struct inoinfo **)calloc((unsigned)listmax,
sizeof(struct inoinfo *));
inphead = (struct inoinfo **)calloc((unsigned)numdirs,
sizeof(struct inoinfo *));
if (inpsort == NULL || inphead == NULL) {
printf("cannot alloc %u bytes for inphead\n",
(unsigned)(numdirs * sizeof(struct inoinfo *)));
goto badsblabel;
}
cgrp = malloc(sblock->fs_cgsize);
if (cgrp == NULL) {
printf("cannot alloc %u bytes for cylinder group\n",
sblock->fs_cgsize);
goto badsblabel;
}
bufinit();
if (sblock->fs_flags & FS_DOSOFTDEP)
usedsoftdep = 1;
else
usedsoftdep = 0;
{
struct partition *pp = 0;
if (!forceimage)
pp = getdisklabelpart(dev,lp);
if (pp && (pp->p_fstype == FS_APPLEUFS)) {
isappleufs = 1;
}
}
if (readappleufs()) {
isappleufs = 1;
}
dirblksiz = DIRBLKSIZ;
if (isappleufs)
dirblksiz = APPLEUFS_DIRBLKSIZ;
if (debug)
printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz);
return (1);
badsblabel:
markclean=0;
ckfini();
return (0);
}
static int
readappleufs()
{
ufs_daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize;
struct appleufslabel *appleufs;
int i;
/* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not
* being block aligned (CD's?)
*/
if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, (long)APPLEUFS_LABEL_SIZE) != 0)
return 0;
appleufsblk.b_bno = label;
appleufsblk.b_size = APPLEUFS_LABEL_SIZE;
appleufs = appleufsblk.b_un.b_appleufs;
if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) {
if (!isappleufs) {
return 0;
} else {
pfatal("MISSING APPLEUFS VOLUME LABEL\n");
if (reply("FIX") == 0) {
return 1;
}
ffs_appleufs_set(appleufs,NULL,-1);
appleufsdirty();
}
}
if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) {
pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)",
ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION);
if (preen) {
printf(" (CORRECTED)\n");
}
if (preen || reply("CORRECT")) {
appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION);
appleufsdirty();
}
}
if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) {
pwarn("APPLE UFS LABEL NAME TOO LONG");
if (preen) {
printf(" (TRUNCATED)\n");
}
if (preen || reply("TRUNCATE")) {
appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME);
appleufsdirty();
}
}
if (ntohs(appleufs->ul_namelen) == 0) {
pwarn("MISSING APPLE UFS LABEL NAME");
if (preen) {
printf(" (FIXED)\n");
}
if (preen || reply("FIX")) {
ffs_appleufs_set(appleufs,NULL,-1);
appleufsdirty();
}
}
/* Scan name for first illegal character */
for (i=0;i<ntohs(appleufs->ul_namelen);i++) {
if ((appleufs->ul_name[i] == '\0') ||
(appleufs->ul_name[i] == ':') ||
(appleufs->ul_name[i] == '/')) {
pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER");
if (preen) {
printf(" (TRUNCATED)\n");
}
if (preen || reply("TRUNCATE")) {
appleufs->ul_namelen = i+1;
appleufsdirty();
}
break;
}
}
/* Check the checksum last, because if anything else was wrong,
* then the checksum gets reset anyway.
*/
appleufs->ul_checksum = 0;
appleufs->ul_checksum = ffs_appleufs_cksum(appleufs);
if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) {
pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)",
appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum);
if (preen) {
printf(" (CORRECTED)\n");
}
if (preen || reply("CORRECT")) {
appleufsdirty();
} else {
/* put the incorrect checksum back in place */
appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum;
}
}
return 1;
}
/*
* Read in the super block and its summary info.
*/
static int
readsb(listerr)
int listerr;
{
ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
struct fs *fs;
if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0)
return (0);
sblk.b_bno = super;
sblk.b_size = SBSIZE;
fs = sblk.b_un.b_fs;
/* auto detect byte order */
if( fs->fs_magic == FS_MAGIC) {
if (endian == 0 || BYTE_ORDER == endian) {
needswap = 0;
doswap = do_blkswap = do_dirswap = 0;
} else {
needswap = 1;
doswap = do_blkswap = do_dirswap = 1;
}
} else if (fs->fs_magic == bswap32(FS_MAGIC)) {
if (endian == 0 || BYTE_ORDER != endian) {
needswap = 1;
doswap = do_blkswap = do_dirswap = 0;
} else {
needswap = 0;
doswap = do_blkswap = do_dirswap = 1;
}
} else {
badsb(listerr, "MAGIC NUMBER WRONG");
return (0);
}
if (doswap) {
if (preen)
errx(EEXIT, "incompatible options -B and -p");
if (nflag)
errx(EEXIT, "incompatible options -B and -n");
if (endian == LITTLE_ENDIAN) {
if (!reply("CONVERT TO LITTLE ENDIAN"))
return 0;
} else if (endian == BIG_ENDIAN) {
if (!reply("CONVERT TO BIG ENDIAN"))
return 0;
} else
pfatal("INTERNAL ERROR: unknown endian");
}
if (needswap)
printf("** Swapped byte order\n");
/* swap SB byte order if asked */
if (doswap)
ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs);
memmove(sblock, sblk.b_un.b_fs, SBSIZE);
if (needswap)
ffs_sb_swap(sblk.b_un.b_fs, sblock);
/*
* run a few consistency checks of the super block
*/
if (sblock->fs_ncg < 1)
{ 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(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
if (sblock->fs_sbsize > SBSIZE)
{ 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;
if (bflag) {
havesb = 1;
return (1);
}
/*
* 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.
*/
getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize);
if (asblk.b_errs)
return (0);
/* swap SB byte order if asked */
if (doswap)
ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs);
memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize);
if (needswap)
ffs_sb_swap(asblk.b_un.b_fs, altsblock);
if (cmpsblks(sblock, altsblock)) {
if (debug) {
long *nlp, *olp, *endlp;
printf("superblock mismatches\n");
nlp = (long *)altsblock;
olp = (long *)sblock;
endlp = olp + (sblock->fs_sbsize / sizeof *olp);
for ( ; olp < endlp; olp++, nlp++) {
if (*olp == *nlp)
continue;
printf("offset %ld, original %lx, alternate %lx\n",
(long)(olp - (long *)sblock), *olp, *nlp);
}
}
badsb(listerr,
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
return (0);
}
/* Now we know the SB is valid, we can write it back if needed */
if (doswap) {
sbdirty();
dirty(&asblk);
}
havesb = 1;
return (1);
}
int
cmpsblks(const struct fs *sb, struct fs *asb)
{
/*
* Copy fields which we don't care if they're different in the
* alternate superblocks, as they're either likely to be
* different because they're per-cylinder-group specific, or
* because they're transient details which are only maintained
* in the primary superblock.
*/
asb->fs_firstfield = sb->fs_firstfield;
asb->fs_unused_1 = sb->fs_unused_1;
asb->fs_time = sb->fs_time;
asb->fs_cstotal = sb->fs_cstotal;
asb->fs_cgrotor = sb->fs_cgrotor;
asb->fs_fmod = sb->fs_fmod;
asb->fs_clean = sb->fs_clean;
asb->fs_ronly = sb->fs_ronly;
asb->fs_flags = sb->fs_flags;
asb->fs_maxcontig = sb->fs_maxcontig;
asb->fs_minfree = sb->fs_minfree;
asb->fs_optim = sb->fs_optim;
asb->fs_rotdelay = sb->fs_rotdelay;
asb->fs_maxbpg = sb->fs_maxbpg;
memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp);
asb->fs_contigdirs = sb->fs_contigdirs;
asb->fs_csp = sb->fs_csp;
asb->fs_maxcluster = sb->fs_maxcluster;
memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt);
memmove(asb->fs_snapinum,
sb->fs_snapinum, sizeof sb->fs_snapinum);
asb->fs_avgfilesize = sb->fs_avgfilesize;
asb->fs_avgfpdir = sb->fs_avgfpdir;
asb->fs_pendingblocks = sb->fs_pendingblocks;
asb->fs_pendinginodes = sb->fs_pendinginodes;
memmove(asb->fs_sparecon,
sb->fs_sparecon, sizeof sb->fs_sparecon);
/*
* The following should not have to be copied, but need to be.
*/
asb->fs_fsbtodb = sb->fs_fsbtodb;
asb->fs_interleave = sb->fs_interleave;
asb->fs_npsect = sb->fs_npsect;
asb->fs_nrpos = sb->fs_nrpos;
asb->fs_qbmask = sb->fs_qbmask;
asb->fs_qfmask = sb->fs_qfmask;
asb->fs_state = sb->fs_state;
asb->fs_maxfilesize = sb->fs_maxfilesize;
/*
* Compare the superblocks, effectively checking every other
* field to see if they differ.
*/
return (memcmp(sb, asb, (int)sb->fs_sbsize));
}
static void
badsb(listerr, s)
int listerr;
char *s;
{
if (!listerr)
return;
if (preen)
printf("%s: ", cdevname());
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!
*/
static int
calcsb(dev, devfd, fs)
const char *dev;
int devfd;
struct fs *fs;
{
struct disklabel *lp;
struct partition *pp;
int i;
lp = getdisklabel(dev, devfd);
pp = getdisklabelpart(dev,lp);
if (pp == 0) {
pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
return (0);
}
if ((pp->p_fstype != FS_BSDFFS) && (pp->p_fstype != FS_APPLEUFS)) {
pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
dev, pp->p_fstype < FSMAXTYPES ?
fstypenames[pp->p_fstype] : "unknown");
return (0);
}
/* avoid divide by 0 */
if (pp->p_fsize == 0 || pp->p_frag == 0)
return (0);
memset(fs, 0, 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);
}
static struct disklabel *
getdisklabel(s, fd)
const char *s;
int fd;
{
static struct disklabel lab;
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
if (s == NULL)
return ((struct disklabel *)NULL);
pwarn("ioctl (GCINFO): %s\n", strerror(errno));
errx(EEXIT, "%s: can't read disk label", s);
}
return (&lab);
}
static struct partition *
getdisklabelpart(dev, lp)
const char *dev;
struct disklabel *lp;
{
char *cp;
cp = strchr(dev, '\0') - 1;
if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'p')) && !isdigit(*cp)) {
return 0;
}
if (isdigit(*cp))
return &lp->d_partitions[0];
else
return &lp->d_partitions[*cp - 'a'];
}
Reference in New Issue View Git Blame Copy Permalink