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NetBSD/sbin/fsck_lfs/setup.c

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/* $Id: setup.c,v 1.2 1999/03/24 05:32:23 nathanw 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.
*/
/* #define DKTYPENAMES */
#define FSTYPENAMES
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/file.h>
#include <ufs/ufs/dinode.h>
#include <sys/mount.h> /* XXX ufs/lfs/lfs.h should include this for us */
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_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"
struct bufarea asblk;
extern struct dinode **din_table;
extern SEGUSE *seg_table;
#define altsblock (*asblk.b_un.b_fs)
#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
void badsb __P((int, char *));
int calcsb __P((const char *, int, struct lfs *));
static struct disklabel *getdisklabel __P((const char *, int));
static int readsb __P((int));
int lfs_maxino(void);
#ifdef DKTYPENAMES
int useless __P((void));
int
useless(void)
{
char **foo = (char **)dktypenames;
char **bar = (char **)fscknames;
return foo-bar;
}
#endif
int
setup(dev)
const char *dev;
{
long bmapsize;
struct disklabel *lp;
#if 0
long i;
off_t sizepb;
#endif
struct stat statb;
struct lfs proto;
int doskipclean;
u_int64_t maxfilesize;
struct lfs *sb0;
havesb = 0;
fswritefd = -1;
doskipclean = skipclean;
if (stat(dev, &statb) < 0) {
printf("Can't stat %s: %s\n", dev, strerror(errno));
return (0);
}
if (!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(LFS_SBPAD);
asblk.b_un.b_buf = malloc(LFS_SBPAD);
if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
errexit("cannot allocate space for superblock\n");
if ((lp = getdisklabel((char *)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 || calcsb(dev, fsreadfd, &proto) == 0)
return(0);
if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
return (0);
#if 0 /* XXX find the LFS way to do this */
for (cg = 0; cg < proto.lfs_ncg; cg++) {
bflag = fsbtodb(&proto, cgsblock(&proto, cg));
if (readsb(0) != 0)
break;
}
if (cg >= proto.lfs_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);
}
#else
pwarn("XXX Can't look for alternate superblocks yet\n");
return(0);
#endif
doskipclean = 0;
pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
}
if(bflag==0) {
/*
* Even if that superblock read in properly, it may not
* be guaranteed to point to a complete checkpoint.
* Read in the second superblock too, and take whichever
* of the two is *less* recent. --ks
*/
sb0 = malloc(sizeof(*sb0));
memcpy(sb0,&sblock,sizeof(*sb0));
bflag = sblock.lfs_sboffs[1];
if(readsb(1)==0) {
pwarn("COULDN'T READ ALT SUPERBLOCK AT BLK %d",bflag);
if (reply("ASSUME PRIMARY SUPERBLOCK IS GOOD") == 0) {
return (0);
} else { /* use primary as good */
memcpy(&sblock,sb0,sizeof(*sb0)); /* XXX cheating? */
}
} else {
if(debug)
pwarn("sb0 %d, sb1 %d\n",sb0->lfs_tstamp,sblock.lfs_tstamp);
if(sblock.lfs_tstamp >= sb0->lfs_tstamp) {
memcpy(&sblock,sb0,sizeof(*sb0)); /* XXX cheating? */
} else {
pwarn("Using alt superblock, disk addr 0x%x\n",
bflag);
}
}
free(sb0);
}
if(debug) {
printf("dev_bsize = %lu\n",dev_bsize);
printf("lfs_bsize = %lu\n",(unsigned long)sblock.lfs_bsize);
printf("lfs_fsize = %lu\n",(unsigned long)sblock.lfs_fsize);
printf("lfs_frag = %lu\n",(unsigned long)sblock.lfs_frag);
printf("INOPB(fs) = %lu\n",(unsigned long)INOPB(&sblock));
/* printf("fsbtodb(fs,1) = %lu\n",fsbtodb(&sblock,1)); */
}
#if 0 /* FFS-specific fs-clean check */
if (debug)
printf("clean = %d\n", sblock.lfs_clean);
if (sblock.lfs_clean & FS_ISCLEAN) {
if (doskipclean) {
pwarn("%sile system is clean; not checking\n",
preen ? "f" : "** F");
return (-1);
}
if (!preen)
pwarn("** File system is already clean\n");
}
maxino = sblock.lfs_ncg * sblock.lfs_ipg;
#else
#if 0
/* XXX - count the number of inodes here */
maxino = sblock.lfs_nfiles+2;
#else
initbarea(&iblk);
iblk.b_un.b_buf = malloc(sblock.lfs_bsize);
if(bread(fsreadfd, (char *)iblk.b_un.b_buf,
sblock.lfs_idaddr,
(long)sblock.lfs_bsize) != 0)
{
printf("Couldn't read disk block %d\n",sblock.lfs_idaddr);
exit(1);
}
maxino = lfs_maxino();
#endif
if (debug)
printf("maxino=%d\n",maxino);
din_table = (struct dinode **)malloc(maxino*sizeof(*din_table));
memset(din_table,0,maxino*sizeof(*din_table));
seg_table = (SEGUSE *)malloc(sblock.lfs_nseg * sizeof(SEGUSE));
memset(seg_table,0,sblock.lfs_nseg * sizeof(SEGUSE));
#endif
maxfsblock = sblock.lfs_size * (sblock.lfs_bsize / dev_bsize);
#if 0
sizepb = sblock.lfs_bsize;
maxfilesize = sblock.lfs_bsize * NDADDR - 1;
for (i = 0; i < NIADDR; i++) {
sizepb *= NINDIR(&sblock);
maxfilesize += sizepb;
}
maxfilesize++; /* XXX */
#else /* LFS way */
{
u_quad_t maxtable[] = {
/* 1 */ -1,
/* 2 */ -1,
/* 4 */ -1,
/* 8 */ -1,
/* 16 */ -1,
/* 32 */ -1,
/* 64 */ -1,
/* 128 */ -1,
/* 256 */ -1,
/* 512 */ NDADDR + 128 + 128 * 128 + 128 * 128 * 128,
/* 1024 */ NDADDR + 256 + 256 * 256 + 256 * 256 * 256,
/* 2048 */ NDADDR + 512 + 512 * 512 + 512 * 512 * 512,
/* 4096 */ NDADDR + 1024 + 1024 * 1024 + 1024 * 1024 * 1024,
/* 8192 */ 1 << 31,
/* 16 K */ 1 << 31,
/* 32 K */ 1 << 31,
};
maxfilesize = maxtable[sblock.lfs_bshift] << sblock.lfs_bshift;
}
#endif
if ((sblock.lfs_minfree < 0 || sblock.lfs_minfree > 99)) {
pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
sblock.lfs_minfree);
if (reply("SET TO DEFAULT") == 1) {
sblock.lfs_minfree = 10;
sbdirty();
}
}
/* XXX used to be ~(sblock.lfs_bsize - 1) */
if (sblock.lfs_bmask != sblock.lfs_bsize - 1) {
pwarn("INCORRECT BMASK=%x IN SUPERBLOCK (should be %x)",
(unsigned int)sblock.lfs_bmask,
(unsigned int)sblock.lfs_bsize - 1);
sblock.lfs_bmask = sblock.lfs_bsize - 1;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
#if 0 /* FFS-specific checks */
if (sblock.lfs_fmask != ~(sblock.lfs_fsize - 1)) {
pwarn("INCORRECT FMASK=%x IN SUPERBLOCK",
sblock.lfs_fmask);
sblock.lfs_fmask = ~(sblock.lfs_fsize - 1);
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
#endif
if (sblock.lfs_maxfilesize != maxfilesize) {
pwarn("INCORRECT MAXFILESIZE=%qu IN SUPERBLOCK (should be %qu)",
(unsigned long long)sblock.lfs_maxfilesize,
(unsigned long long)maxfilesize);
sblock.lfs_maxfilesize = maxfilesize;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
if (sblock.lfs_maxsymlinklen != MAXSYMLINKLEN) {
pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK",
sblock.lfs_maxsymlinklen);
sblock.lfs_maxsymlinklen = MAXSYMLINKLEN;
if (preen)
printf(" (FIXED)\n");
if (preen || reply("FIX") == 1) {
sbdirty();
dirty(&asblk);
}
}
newinofmt = 1;
/*
* allocate and initialize the necessary maps
*/
#ifndef VERBOSE_BLOCKMAP
bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t));
blockmap = malloc((unsigned)bmapsize * sizeof (char));
bzero(blockmap, bmapsize * sizeof(char));
#else
bmapsize = maxfsblock*sizeof(ino_t);
blockmap = (ino_t *)malloc(maxfsblock * sizeof (ino_t));
bzero(blockmap, maxfsblock * sizeof(ino_t));
#endif
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 %lu bytes for lncntp\n",
(unsigned long)(maxino + 1) * sizeof(int16_t));
goto badsblabel;
}
bufinit();
return (1);
badsblabel:
ckfini(0);
return (0);
}
/*
* Read in the LFS super block and its summary info.
*/
static int
readsb(listerr)
int listerr;
{
daddr_t super = bflag ? bflag : LFS_LABELPAD / dev_bsize;
u_int32_t checksum;
if (bread(fsreadfd, (char *)&sblock, super, (long)LFS_SBPAD) != 0)
return (0);
sblk.b_bno = super;
sblk.b_size = LFS_SBPAD;
/*
* run a few consistency checks of the super block
*/
if (sblock.lfs_magic != LFS_MAGIC)
{ badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
/* checksum */
checksum = lfs_sb_cksum(&(sblock.lfs_dlfs));
if(sblock.lfs_cksum != checksum)
{
printf("Superblock checksum (%lu) does not match computed checksum %lu\n",
(unsigned long)sblock.lfs_cksum, (unsigned long)checksum);
}
#if 0 /* XXX - replace these checks with appropriate LFS sanity checks */
if (sblock.lfs_ncg < 1)
{ badsb(listerr, "NCG OUT OF RANGE"); return (0); }
if (sblock.lfs_cpg < 1)
{ badsb(listerr, "CPG OUT OF RANGE"); return (0); }
if (sblock.lfs_ncg * sblock.lfs_cpg < sblock.lfs_ncyl ||
(sblock.lfs_ncg - 1) * sblock.lfs_cpg >= sblock.lfs_ncyl)
{ badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
if (sblock.lfs_sbsize > SBSIZE)
{ badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
#endif
/*
* 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;
#if 0
dev_bsize = sblock.lfs_bsize / fsbtodb(&sblock, 1);
#endif
sblk.b_bno = super / dev_bsize;
if (bflag) {
havesb = 1;
return (1);
}
#if 0 /* XXX - for now skip the alt. superblock test as well */
/*
* 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.lfs_ncg - 1), sblock.lfs_sbsize);
if (asblk.b_errs)
return (0);
altsblock.lfs_firstfield = sblock.lfs_firstfield;
altsblock.lfs_fscktime = sblock.lfs_fscktime;
altsblock.lfs_time = sblock.lfs_time;
altsblock.lfs_cstotal = sblock.lfs_cstotal;
altsblock.lfs_cgrotor = sblock.lfs_cgrotor;
altsblock.lfs_fmod = sblock.lfs_fmod;
altsblock.lfs_clean = sblock.lfs_clean;
altsblock.lfs_ronly = sblock.lfs_ronly;
altsblock.lfs_flags = sblock.lfs_flags;
altsblock.lfs_maxcontig = sblock.lfs_maxcontig;
altsblock.lfs_minfree = sblock.lfs_minfree;
altsblock.lfs_optim = sblock.lfs_optim;
altsblock.lfs_rotdelay = sblock.lfs_rotdelay;
altsblock.lfs_maxbpg = sblock.lfs_maxbpg;
memcpy(altsblock.lfs_csp, sblock.lfs_csp,
sizeof sblock.lfs_csp);
altsblock.lfs_maxcluster = sblock.lfs_maxcluster;
memcpy(altsblock.lfs_fsmnt, sblock.lfs_fsmnt,
sizeof sblock.lfs_fsmnt);
memcpy(altsblock.lfs_sparecon, sblock.lfs_sparecon,
sizeof sblock.lfs_sparecon);
/*
* The following should not have to be copied.
*/
altsblock.lfs_fsbtodb = sblock.lfs_fsbtodb;
altsblock.lfs_interleave = sblock.lfs_interleave;
altsblock.lfs_npsect = sblock.lfs_npsect;
altsblock.lfs_nrpos = sblock.lfs_nrpos;
altsblock.lfs_state = sblock.lfs_state;
altsblock.lfs_qbmask = sblock.lfs_qbmask;
altsblock.lfs_qfmask = sblock.lfs_qfmask;
altsblock.lfs_state = sblock.lfs_state;
altsblock.lfs_maxfilesize = sblock.lfs_maxfilesize;
if (memcmp(&sblock, &altsblock, (int)sblock.lfs_sbsize)) {
if (debug) {
long *nlp, *olp, *endlp;
printf("superblock mismatches\n");
nlp = (long *)&altsblock;
olp = (long *)&sblock;
endlp = olp + (sblock.lfs_sbsize / sizeof *olp);
for ( ; olp < endlp; olp++, nlp++) {
if (*olp == *nlp)
continue;
printf("offset %d, original %ld, alternate %ld\n",
olp - (long *)&sblock, *olp, *nlp);
}
}
badsb(listerr,
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
return (0);
}
#endif
havesb = 1;
return (1);
}
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!
*/
int
calcsb(dev, devfd, fs)
const char *dev;
int devfd;
register struct lfs *fs;
{
register struct disklabel *lp;
register struct partition *pp;
register char *cp;
int i;
cp = strchr(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_BSDLFS) {
pfatal("%s: NOT LABELED AS AN LFS FILE SYSTEM (%s)\n",
dev, pp->p_fstype < FSMAXTYPES ?
fstypenames[pp->p_fstype] : "unknown");
return (0);
}
memset(fs, 0, sizeof(struct lfs));
fs->lfs_fsize = pp->p_fsize;
fs->lfs_frag = pp->p_frag;
fs->lfs_size = pp->p_size;
fs->lfs_nspf = fs->lfs_fsize / lp->d_secsize;
dev_bsize = lp->d_secsize;
for (fs->lfs_fsbtodb = 0, i = fs->lfs_nspf; i > 1; i >>= 1)
fs->lfs_fsbtodb++;
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));
errexit("%s: can't read disk label\n", s);
}
return (&lab);
}
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