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freebsd-dev/sbin/fsck_ffs/setup.c
Kirk McKusick 1c85e6a35d This commit adds basic support for the UFS2 filesystem. The UFS2 
filesystem expands the inode to 256 bytes to make space for 64-bit
block pointers. It also adds a file-creation time field, an ability
to use jumbo blocks per inode to allow extent like pointer density,
and space for extended attributes (up to twice the filesystem block
size worth of attributes, e.g., on a 16K filesystem, there is space
for 32K of attributes). UFS2 fully supports and runs existing UFS1
filesystems. New filesystems built using newfs can be built in either
UFS1 or UFS2 format using the -O option. In this commit UFS1 is
the default format, so if you want to build UFS2 format filesystems,
you must specify -O 2. This default will be changed to UFS2 when
UFS2 proves itself to be stable. In this commit the boot code for
reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c)
as there is insufficient space in the boot block. Once the size of the
boot block is increased, this code can be defined.

Things to note: the definition of SBSIZE has changed to SBLOCKSIZE.
The header file <ufs/ufs/dinode.h> must be included before
<ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and
ufs_lbn_t.

Still TODO:
Verify that the first level bootstraps work for all the architectures.
Convert the utility ffsinfo to understand UFS2 and test growfs.
Add support for the extended attribute storage. Update soft updates
to ensure integrity of extended attribute storage. Switch the
current extended attribute interfaces to use the extended attribute
storage. Add the extent like functionality (framework is there,
but is currently never used).

Sponsored by: DARPA & NAI Labs.
Reviewed by:	Poul-Henning Kamp <phk@freebsd.org>
2002-06-21 06:18:05 +00:00

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/*
* 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.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#define DKTYPENAMES
#include <sys/param.h>
#include <sys/stat.h>
#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 <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, char *s);
static int calcsb(char *dev, int devfd, struct fs *fs);
static struct disklabel *getdisklabel(char *s, int fd);
/*
* 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(char *dev)
{
long cg, asked, i, j;
long bmapsize;
off_t sizepb;
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);
}
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 || 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 TO SPECIFY THE",
"LOCATION OF AN ALTERNATE",
"SUPER-BLOCK TO SUPPLY NEEDED",
"INFORMATION; SEE fsck(8).");
bflag = 0;
return(0);
}
pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
bflag = 0;
}
if (skipclean && preen && sblock.fs_clean) {
pwarn("FILESYSTEM 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 filesystem 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);
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;
if (bread(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, NBBY), 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((unsigned)(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 = sblock.fs_cstotal.cs_ndir;
dirhash = numdirs;
if (numdirs == 0) {
printf("numdirs is zero, try using an alternate superblock\n");
goto badsb;
}
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 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;
/*
* Read in the super block and its summary info.
*/
int
readsb(int listerr)
{
ufs2_daddr_t super;
int i;
if (bflag) {
super = bflag;
if ((bread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE)))
return (0);
} else {
for (i = 0; sblock_try[i] != -1; i++) {
super = sblock_try[i] / dev_bsize;
if ((bread(fsreadfd, (char *)&sblock, super,
(long)SBLOCKSIZE)))
return (0);
if ((sblock.fs_magic == FS_UFS1_MAGIC ||
(sblock.fs_magic == FS_UFS2_MAGIC &&
sblock.fs_sblockloc ==
numfrags(&sblock, sblock_try[i]))) &&
sblock.fs_ncg >= 1 &&
sblock.fs_bsize >= SBLOCKSIZE &&
sblock.fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1) {
fprintf(stderr, "Cannot find filesystem superblock\n");
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;
sblk.b_size = SBLOCKSIZE;
if (bflag) {
havesb = 1;
return (1);
}
/*
* 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);
}
/*
* 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, char *s)
{
if (!listerr)
return;
if (preen)
printf("%s: ", cdevname);
pfatal("BAD SUPER BLOCK: %s\n", s);
}
void
sblock_init(void)
{
struct disklabel *lp;
fswritefd = -1;
fsmodified = 0;
lfdir = 0;
initbarea(&sblk);
initbarea(&asblk);
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");
if ((lp = getdisklabel(NULL, fsreadfd)))
dev_bsize = secsize = lp->d_secsize;
else
dev_bsize = secsize = DEV_BSIZE;
}
/*
* 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(char *dev, int devfd, struct fs *fs)
{
struct disklabel *lp;
struct partition *pp;
char *cp;
int i, nspf;
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_BSDFFS) {
pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
dev, pp->p_fstype < FSMAXTYPES ?
fstypenames[pp->p_fstype] : "unknown");
return (0);
}
if (pp->p_fsize == 0 || pp->p_frag == 0 ||
pp->p_cpg == 0 || pp->p_size == 0) {
pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n",
dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype],
pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size);
return (0);
}
memset(fs, 0, sizeof(struct fs));
fs->fs_fsize = pp->p_fsize;
fs->fs_frag = pp->p_frag;
fs->fs_size = pp->p_size;
fs->fs_sblkno = roundup(
howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
fs->fs_frag);
nspf = fs->fs_fsize / lp->d_secsize;
for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1)
fs->fs_fsbtodb++;
dev_bsize = lp->d_secsize;
if (fs->fs_magic == FS_UFS2_MAGIC) {
fs->fs_fpg = pp->p_cpg;
fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg);
} else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ {
fs->fs_old_cpg = pp->p_cpg;
fs->fs_old_cgmask = 0xffffffff;
for (i = lp->d_ntracks; i > 1; i >>= 1)
fs->fs_old_cgmask <<= 1;
if (!POWEROF2(lp->d_ntracks))
fs->fs_old_cgmask <<= 1;
fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf),
fs->fs_frag);
fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf;
fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl,
fs->fs_old_cpg);
}
return (1);
}
static struct disklabel *
getdisklabel(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);
}
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