freebsd-dev/sbin/fsck_ffs/setup.c
Pedro F. Giffuni f671769766 fsck_ffs: Unsign some variables and make use of reallocarray(3).
Instead of casting listmax and numdirs to unsigned values just define
them as unsigned and avoid the casts. Use reallocarray(3).

While here, fs_ncg is already unsigned so the cast is unnecessary.

Reviewed by:	mckusick
MFC after:	2 weeks
2017-04-22 14:50:11 +00:00

446 lines
13 KiB
C

/*
* 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. 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.
*/
#if 0
#ifndef lint
static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#define FSTYPENAMES
#include <sys/disklabel.h>
#include <sys/file.h>
#include <sys/sysctl.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <string.h>
#include "fsck.h"
struct bufarea asblk;
#define altsblock (*asblk.b_un.b_fs)
#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
static void badsb(int listerr, const char *s);
/*
* Read in a superblock finding an alternate if necessary.
* Return 1 if successful, 0 if unsuccessful, -1 if file system
* is already clean (ckclean and preen mode only).
*/
int
setup(char *dev)
{
long cg, asked, i, j;
long bmapsize;
struct stat statb;
struct fs proto;
size_t size;
havesb = 0;
fswritefd = -1;
cursnapshot = 0;
if (stat(dev, &statb) < 0) {
printf("Can't stat %s: %s\n", dev, strerror(errno));
if (bkgrdflag) {
unlink(snapname);
bkgrdflag = 0;
}
return (0);
}
if ((statb.st_mode & S_IFMT) != S_IFCHR &&
(statb.st_mode & S_IFMT) != S_IFBLK) {
if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
unlink(snapname);
printf("background fsck lacks a snapshot\n");
exit(EEXIT);
}
if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
cursnapshot = statb.st_ino;
} else {
if (cvtlevel == 0 ||
(statb.st_flags & SF_SNAPSHOT) == 0) {
if (preen && bkgrdflag) {
unlink(snapname);
bkgrdflag = 0;
}
pfatal("%s is not a disk device", dev);
if (reply("CONTINUE") == 0) {
if (bkgrdflag) {
unlink(snapname);
bkgrdflag = 0;
}
return (0);
}
} else {
if (bkgrdflag) {
unlink(snapname);
bkgrdflag = 0;
}
pfatal("cannot convert a snapshot");
exit(EEXIT);
}
}
}
if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
if (bkgrdflag) {
unlink(snapname);
bkgrdflag = 0;
}
printf("Can't open %s: %s\n", dev, strerror(errno));
return (0);
}
if (bkgrdflag) {
unlink(snapname);
size = MIBSIZE;
if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
pfatal("kernel lacks background fsck support\n");
exit(EEXIT);
}
/*
* When kernel is lack of runtime bgfsck superblock summary
* adjustment functionality, it does not mean we can not
* continue, as old kernels will recompute the summary at
* mount time. However, it will be an unexpected softupdates
* inconsistency if it turns out that the summary is still
* incorrect. Set a flag so subsequent operation can know
* this.
*/
bkgrdsumadj = 1;
if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) {
bkgrdsumadj = 0;
pwarn("kernel lacks runtime superblock summary adjustment support");
}
cmd.version = FFS_CMD_VERSION;
cmd.handle = fsreadfd;
fswritefd = -1;
}
if (preen == 0)
printf("** %s", dev);
if (bkgrdflag == 0 &&
(nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
fswritefd = -1;
if (preen)
pfatal("NO WRITE ACCESS");
printf(" (NO WRITE)");
}
if (preen == 0)
printf("\n");
/*
* Read in the superblock, looking for alternates if necessary
*/
if (readsb(1) == 0) {
skipclean = 0;
if (bflag || preen)
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_ffs(8).");
bflag = 0;
return(0);
}
pwarn("USING ALTERNATE SUPERBLOCK AT %jd\n", bflag);
bflag = 0;
}
if (skipclean && ckclean && sblock.fs_clean) {
pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
return (-1);
}
maxfsblock = sblock.fs_size;
maxino = 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_magic == FS_UFS1_MAGIC &&
sblock.fs_old_inodefmt < FS_44INODEFMT) {
pwarn("Format of file system is too old.\n");
pwarn("Must update to modern format using a version of fsck\n");
pfatal("from before 2002 with the command ``fsck -c 2''\n");
exit(EEXIT);
}
if (asblk.b_dirty && !bflag) {
memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
flush(fswritefd, &asblk);
}
/*
* read in the summary info.
*/
asked = 0;
sblock.fs_csp = Calloc(1, sblock.fs_cssize);
if (sblock.fs_csp == NULL) {
printf("cannot alloc %u bytes for cg summary info\n",
(unsigned)sblock.fs_cssize);
goto badsb;
}
for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
size = MIN(sblock.fs_cssize - i, sblock.fs_bsize);
readcnt[sblk.b_type]++;
if (blread(fsreadfd, (char *)sblock.fs_csp + i,
fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
size) != 0 && !asked) {
pfatal("BAD SUMMARY INFORMATION");
if (reply("CONTINUE") == 0) {
ckfini(0);
exit(EEXIT);
}
asked++;
}
}
/*
* allocate and initialize the necessary maps
*/
bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
blockmap = Calloc((unsigned)bmapsize, sizeof (char));
if (blockmap == NULL) {
printf("cannot alloc %u bytes for blockmap\n",
(unsigned)bmapsize);
goto badsb;
}
inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
if (inostathead == NULL) {
printf("cannot alloc %u bytes for inostathead\n",
(unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
goto badsb;
}
numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
dirhash = numdirs;
inplast = 0;
listmax = numdirs + 10;
inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
if (inpsort == NULL || inphead == NULL) {
printf("cannot alloc %ju bytes for inphead\n",
(uintmax_t)numdirs * sizeof(struct inoinfo *));
goto badsb;
}
bufinit();
if (sblock.fs_flags & FS_DOSOFTDEP)
usedsoftdep = 1;
else
usedsoftdep = 0;
return (1);
badsb:
ckfini(0);
return (0);
}
/*
* Possible superblock locations ordered from most to least likely.
*/
static int sblock_try[] = SBLOCKSEARCH;
#define BAD_MAGIC_MSG \
"The previous newfs operation on this volume did not complete.\n" \
"You must complete newfs before mounting this volume.\n"
/*
* Read in the super block and its summary info.
*/
int
readsb(int listerr)
{
ufs2_daddr_t super;
int i;
if (bflag) {
super = bflag;
readcnt[sblk.b_type]++;
if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE)))
return (0);
if (sblock.fs_magic == FS_BAD_MAGIC) {
fprintf(stderr, BAD_MAGIC_MSG);
exit(11);
}
if (sblock.fs_magic != FS_UFS1_MAGIC &&
sblock.fs_magic != FS_UFS2_MAGIC) {
fprintf(stderr, "%jd is not a file system superblock\n",
bflag);
return (0);
}
} else {
for (i = 0; sblock_try[i] != -1; i++) {
super = sblock_try[i] / dev_bsize;
readcnt[sblk.b_type]++;
if ((blread(fsreadfd, (char *)&sblock, super,
(long)SBLOCKSIZE)))
return (0);
if (sblock.fs_magic == FS_BAD_MAGIC) {
fprintf(stderr, BAD_MAGIC_MSG);
exit(11);
}
if ((sblock.fs_magic == FS_UFS1_MAGIC ||
(sblock.fs_magic == FS_UFS2_MAGIC &&
sblock.fs_sblockloc == sblock_try[i])) &&
sblock.fs_ncg >= 1 &&
sblock.fs_bsize >= MINBSIZE &&
sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize))
break;
}
if (sblock_try[i] == -1) {
fprintf(stderr, "Cannot find file system superblock\n");
return (0);
}
}
/*
* Compute block size that the file system 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;
sblk.b_size = SBLOCKSIZE;
if (bflag)
goto out;
/*
* Compare all fields that should not differ in 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);
if (altsblock.fs_sblkno != sblock.fs_sblkno ||
altsblock.fs_cblkno != sblock.fs_cblkno ||
altsblock.fs_iblkno != sblock.fs_iblkno ||
altsblock.fs_dblkno != sblock.fs_dblkno ||
altsblock.fs_ncg != sblock.fs_ncg ||
altsblock.fs_bsize != sblock.fs_bsize ||
altsblock.fs_fsize != sblock.fs_fsize ||
altsblock.fs_frag != sblock.fs_frag ||
altsblock.fs_bmask != sblock.fs_bmask ||
altsblock.fs_fmask != sblock.fs_fmask ||
altsblock.fs_bshift != sblock.fs_bshift ||
altsblock.fs_fshift != sblock.fs_fshift ||
altsblock.fs_fragshift != sblock.fs_fragshift ||
altsblock.fs_fsbtodb != sblock.fs_fsbtodb ||
altsblock.fs_sbsize != sblock.fs_sbsize ||
altsblock.fs_nindir != sblock.fs_nindir ||
altsblock.fs_inopb != sblock.fs_inopb ||
altsblock.fs_cssize != sblock.fs_cssize ||
altsblock.fs_ipg != sblock.fs_ipg ||
altsblock.fs_fpg != sblock.fs_fpg ||
altsblock.fs_magic != sblock.fs_magic) {
badsb(listerr,
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
return (0);
}
out:
/*
* If not yet done, update UFS1 superblock with new wider fields.
*/
if (sblock.fs_magic == FS_UFS1_MAGIC &&
sblock.fs_maxbsize != sblock.fs_bsize) {
sblock.fs_maxbsize = sblock.fs_bsize;
sblock.fs_time = sblock.fs_old_time;
sblock.fs_size = sblock.fs_old_size;
sblock.fs_dsize = sblock.fs_old_dsize;
sblock.fs_csaddr = sblock.fs_old_csaddr;
sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
}
havesb = 1;
return (1);
}
static void
badsb(int listerr, const char *s)
{
if (!listerr)
return;
if (preen)
printf("%s: ", cdevname);
pfatal("BAD SUPER BLOCK: %s\n", s);
}
void
sblock_init(void)
{
fswritefd = -1;
fsmodified = 0;
lfdir = 0;
initbarea(&sblk, BT_SUPERBLK);
initbarea(&asblk, BT_SUPERBLK);
sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
asblk.b_un.b_buf = Malloc(SBLOCKSIZE);
if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
errx(EEXIT, "cannot allocate space for superblock");
dev_bsize = secsize = DEV_BSIZE;
}