static int
find_indirblks64(uint64_t blk, int ind_level, uint64_t *wantedblk)
{
#define MAXNINDIR (MAXBSIZE / sizeof(uint64_t))
uint64_t idblk[MAXNINDIR];
int i;
blread(fsreadfd, (char *)idblk, fsbtodb(&sblock, blk), (int)sblock.fs_bsize);
if (ind_level <= 0) {
if (find_blks64(idblk, sblock.fs_bsize / sizeof(uint64_t), wantedblk))
return 1;
} else {
ind_level--;
for (i = 0; i < sblock.fs_bsize / sizeof(uint64_t); i++) {
if (compare_blk64(wantedblk, idblk[i])) {
if (founddatablk(idblk[i]))
return 1;
}
if (idblk[i] != 0)
if (find_indirblks64(idblk[i], ind_level, wantedblk))
return 1;
}
}
#undef MAXNINDIR
return 0;
}
/*
* Check to see if recovery information exists.
* Return 1 if it exists or cannot be created.
* Return 0 if it does not exist and can be created.
*/
static int
chkrecovery(int devfd)
{
struct fsrecovery *fsr;
char *fsrbuf;
u_int secsize;
/*
* Could not determine if backup material exists, so do not
* offer to create it.
*/
if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 ||
(fsrbuf = Malloc(secsize)) == NULL ||
blread(devfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
secsize) != 0)
return (1);
/*
* Recovery material has already been created, so do not
* need to create it again.
*/
fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
if (fsr->fsr_magic == FS_UFS2_MAGIC) {
free(fsrbuf);
return (1);
}
/*
* Recovery material has not been created and can be if desired.
*/
free(fsrbuf);
return (0);
}
/*
* Calculate a prototype superblock based on information in the boot area.
* 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 fsrecovery *fsr;
char *fsrbuf;
u_int secsize;
/*
* We need fragments-per-group and the partition-size.
*
* Newfs stores these details at the end of the boot block area
* at the start of the filesystem partition. If they have been
* overwritten by a boot block, we fail. But usually they are
* there and we can use them.
*/
if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1)
return (0);
fsrbuf = Malloc(secsize);
if (fsrbuf == NULL)
errx(EEXIT, "calcsb: cannot allocate recovery buffer");
if (blread(devfd, fsrbuf,
(SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0)
return (0);
fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
if (fsr->fsr_magic != FS_UFS2_MAGIC)
return (0);
memset(fs, 0, sizeof(struct fs));
fs->fs_fpg = fsr->fsr_fpg;
fs->fs_fsbtodb = fsr->fsr_fsbtodb;
fs->fs_sblkno = fsr->fsr_sblkno;
fs->fs_magic = fsr->fsr_magic;
fs->fs_ncg = fsr->fsr_ncg;
free(fsrbuf);
return (1);
}
void
getblk(struct bufarea *bp, ufs2_daddr_t blk, long size)
{
ufs2_daddr_t dblk;
totalreads++;
dblk = fsbtodb(&sblock, blk);
if (bp->b_bno != dblk) {
flush(fswritefd, bp);
diskreads++;
bp->b_errs = blread(fsreadfd, bp->b_un.b_buf, dblk, size);
bp->b_bno = dblk;
bp->b_size = size;
}
}
/*
* Read the last sector of the boot block, replace the last
* 20 bytes with the recovery information, then write it back.
* The recovery information only works for UFS2 filesystems.
*/
static void
saverecovery(int readfd, int writefd)
{
struct fsrecovery *fsr;
char *fsrbuf;
u_int secsize;
if (sblock.fs_magic != FS_UFS2_MAGIC ||
ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 ||
(fsrbuf = Malloc(secsize)) == NULL ||
blread(readfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
secsize) != 0) {
printf("RECOVERY DATA COULD NOT BE CREATED\n");
return;
}
fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
fsr->fsr_magic = sblock.fs_magic;
fsr->fsr_fpg = sblock.fs_fpg;
fsr->fsr_fsbtodb = sblock.fs_fsbtodb;
fsr->fsr_sblkno = sblock.fs_sblkno;
fsr->fsr_ncg = sblock.fs_ncg;
blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - secsize) / secsize, secsize);
free(fsrbuf);
}
/*
* 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 || 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_ffs(8).");
bflag = 0;
return(0);
}
pwarn("USING ALTERNATE SUPERBLOCK AT %d\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 = sblock.fs_cssize - i < sblock.fs_bsize ?
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((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 = MAX(sblock.fs_cstotal.cs_ndir, 128);
dirhash = numdirs;
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 %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);
}
/*
* 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, "%d 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);
}
