/*
* Allocate an inode on the disk
*/
void
iput(union dinode *ip, ino_t ino)
{
ufs2_daddr_t d;
bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg,
sblock.fs_cgsize);
if (acg.cg_magic != CG_MAGIC) {
printf("cg 0: bad magic number\n");
exit(31);
}
acg.cg_cs.cs_nifree--;
setbit(cg_inosused(&acg), ino);
wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
sblock.fs_cstotal.cs_nifree--;
fscs[0].cs_nifree--;
if (ino >= (unsigned long)sblock.fs_ipg * sblock.fs_ncg) {
printf("fsinit: inode value out of range (%ju).\n",
(uintmax_t)ino);
exit(32);
}
d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino));
bread(&disk, part_ofs + d, (char *)iobuf, sblock.fs_bsize);
if (sblock.fs_magic == FS_UFS1_MAGIC)
((struct ufs1_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] =
ip->dp1;
else
((struct ufs2_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] =
ip->dp2;
wtfs(d, sblock.fs_bsize, (char *)iobuf);
}
int
fsinit1(time_t utime, mode_t mfsmode, uid_t mfsuid, gid_t mfsgid)
{
union dinode node;
/*
* Initialize the node
*/
memset(&node, 0, sizeof(node));
node.dp1.di_atime = utime;
node.dp1.di_mtime = utime;
node.dp1.di_ctime = utime;
/*
* Create the root directory.
*/
if (mfs) {
node.dp1.di_mode = IFDIR | mfsmode;
node.dp1.di_uid = mfsuid;
node.dp1.di_gid = mfsgid;
} else {
node.dp1.di_mode = IFDIR | UMASK;
node.dp1.di_uid = geteuid();
node.dp1.di_gid = getegid();
}
node.dp1.di_nlink = PREDEFDIR;
if (Oflag == 0)
node.dp1.di_size = makedir((struct direct *)oroot_dir,
PREDEFDIR);
else
node.dp1.di_size = makedir(root_dir, PREDEFDIR);
node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
if (node.dp1.di_db[0] == 0)
return (1);
node.dp1.di_blocks = btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, iobuf);
iput(&node, ROOTINO);
#ifdef notyet
/*
* Create the .snap directory.
*/
node.dp1.di_mode |= 020;
node.dp1.di_gid = gid;
node.dp1.di_nlink = SNAPLINKCNT;
node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
if (node.dp1.di_db[0] == 0)
return (1);
node.dp1.di_blocks = btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, iobuf);
iput(&node, ROOTINO + 1);
#endif
return (0);
}
/*
* allocate a block or frag
*/
daddr64_t
alloc(int size, int mode)
{
int i, frag;
daddr64_t d, blkno;
rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
if (acg.cg_magic != CG_MAGIC) {
warnx("cg 0: bad magic number");
return (0);
}
if (acg.cg_cs.cs_nbfree == 0) {
warnx("first cylinder group ran out of space");
return (0);
}
for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag)
if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag))
goto goth;
warnx("internal error: can't find block in cyl 0");
return (0);
goth:
blkno = fragstoblks(&sblock, d);
clrblock(&sblock, cg_blksfree(&acg), blkno);
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
fscs[0].cs_nbfree--;
if (mode & IFDIR) {
acg.cg_cs.cs_ndir++;
sblock.fs_cstotal.cs_ndir++;
fscs[0].cs_ndir++;
}
if (Oflag <= 1) {
cg_blktot(&acg)[cbtocylno(&sblock, d)]--;
cg_blks(&sblock, &acg, cbtocylno(&sblock, d))
[cbtorpos(&sblock, d)]--;
}
if (size != sblock.fs_bsize) {
frag = howmany(size, sblock.fs_fsize);
fscs[0].cs_nffree += sblock.fs_frag - frag;
sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag;
acg.cg_cs.cs_nffree += sblock.fs_frag - frag;
acg.cg_frsum[sblock.fs_frag - frag]++;
for (i = frag; i < sblock.fs_frag; i++)
setbit(cg_blksfree(&acg), d + i);
}
wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
return (d);
}
/*
* Allocate an inode on the disk
*/
void
iput(union dinode *ip, ino_t ino)
{
daddr64_t d;
if (Oflag <= 1)
ip->dp1.di_gen = (u_int32_t)arc4random();
else
ip->dp2.di_gen = (u_int32_t)arc4random();
rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
if (acg.cg_magic != CG_MAGIC)
errx(41, "cg 0: bad magic number");
acg.cg_cs.cs_nifree--;
setbit(cg_inosused(&acg), ino);
wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
sblock.fs_cstotal.cs_nifree--;
fscs[0].cs_nifree--;
if (ino >= sblock.fs_ipg * sblock.fs_ncg)
errx(32, "fsinit: inode value %d out of range", ino);
d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino));
rdfs(d, sblock.fs_bsize, iobuf);
if (Oflag <= 1)
((struct ufs1_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] =
ip->dp1;
else
((struct ufs2_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] =
ip->dp2;
wtfs(d, sblock.fs_bsize, iobuf);
}
/*
* allocate a block or frag
*/
ufs2_daddr_t
alloc(int size, int mode)
{
int i, blkno, frag;
uint d;
bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg,
sblock.fs_cgsize);
if (acg.cg_magic != CG_MAGIC) {
printf("cg 0: bad magic number\n");
exit(38);
}
if (acg.cg_cs.cs_nbfree == 0) {
printf("first cylinder group ran out of space\n");
exit(39);
}
for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag)
if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag))
goto goth;
printf("internal error: can't find block in cyl 0\n");
exit(40);
goth:
blkno = fragstoblks(&sblock, d);
clrblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0)
clrbit(cg_clustersfree(&acg), blkno);
acg.cg_cs.cs_nbfree--;
sblock.fs_cstotal.cs_nbfree--;
fscs[0].cs_nbfree--;
if (mode & IFDIR) {
acg.cg_cs.cs_ndir++;
sblock.fs_cstotal.cs_ndir++;
fscs[0].cs_ndir++;
}
if (size != sblock.fs_bsize) {
frag = howmany(size, sblock.fs_fsize);
fscs[0].cs_nffree += sblock.fs_frag - frag;
sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag;
acg.cg_cs.cs_nffree += sblock.fs_frag - frag;
acg.cg_frsum[sblock.fs_frag - frag]++;
for (i = frag; i < sblock.fs_frag; i++)
setbit(cg_blksfree(&acg), d + i);
}
/* XXX cgwrite(&disk, 0)??? */
wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize,
(char *)&acg);
return ((ufs2_daddr_t)d);
}
/* if block is full, write to disk and setup another of current type */
void newblk(int *adbc, char *db, int *aibc, s4_daddr *ib,
s4btype current_type)
{
s4_daddr bno;
bno = alloc();
wtfs(bno, db, current_type);
memset( db, 0, FSBSIZE );
*adbc = 0;
ib[*aibc] = bno;
(*aibc)++;
if(*aibc >= NFB) {
printf("file too large\n");
error = 1;
*aibc = 0;
}
}
/* release block to superblock cache, spilling to freelist */
void bfree(s4_daddr bno)
{
int i;
/* if super cache is full, replace and refill */
if(filsys->s_nfree >= S4_NICFREE) {
/* put the super cache into this block
as a free list block */
fbuf->df_nfree = filsys->s_nfree;
for(i=0; i<S4_NICFREE; i++)
fbuf->df_free[i] = filsys->s_free[i];
wtfs(bno, (char *)fbuf, s4b_free );
filsys->s_nfree = 0;
}
/* and add this block to the super cache,
either as a direct or as the link to more. */
filsys->s_free[filsys->s_nfree++] = bno;
filsys->s_tfree++;
}
void
mkfs(struct partition *pp, char *fsys)
{
int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg;
long i, j, csfrags;
uint cg;
time_t utime;
quad_t sizepb;
int width;
ino_t maxinum;
int minfragsperinode; /* minimum ratio of frags to inodes */
char tmpbuf[100]; /* XXX this will break in about 2,500 years */
union {
struct fs fdummy;
char cdummy[SBLOCKSIZE];
} dummy;
#define fsdummy dummy.fdummy
#define chdummy dummy.cdummy
/*
* Our blocks == sector size, and the version of UFS we are using is
* specified by Oflag.
*/
disk.d_bsize = sectorsize;
disk.d_ufs = Oflag;
if (Rflag) {
utime = 1000000000;
} else {
time(&utime);
arc4random_stir();
}
sblock.fs_old_flags = FS_FLAGS_UPDATED;
sblock.fs_flags = 0;
if (Uflag)
sblock.fs_flags |= FS_DOSOFTDEP;
if (Lflag)
strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN);
if (Jflag)
sblock.fs_flags |= FS_GJOURNAL;
if (lflag)
sblock.fs_flags |= FS_MULTILABEL;
if (tflag)
sblock.fs_flags |= FS_TRIM;
/*
* Validate the given file system size.
* Verify that its last block can actually be accessed.
* Convert to file system fragment sized units.
*/
if (fssize <= 0) {
printf("preposterous size %jd\n", (intmax_t)fssize);
exit(13);
}
wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize,
(char *)&sblock);
/*
* collect and verify the file system density info
*/
sblock.fs_avgfilesize = avgfilesize;
sblock.fs_avgfpdir = avgfilesperdir;
if (sblock.fs_avgfilesize <= 0)
printf("illegal expected average file size %d\n",
sblock.fs_avgfilesize), exit(14);
if (sblock.fs_avgfpdir <= 0)
printf("illegal expected number of files per directory %d\n",
sblock.fs_avgfpdir), exit(15);
restart:
/*
* collect and verify the block and fragment sizes
*/
sblock.fs_bsize = bsize;
sblock.fs_fsize = fsize;
if (!POWEROF2(sblock.fs_bsize)) {
printf("block size must be a power of 2, not %d\n",
sblock.fs_bsize);
exit(16);
}
if (!POWEROF2(sblock.fs_fsize)) {
printf("fragment size must be a power of 2, not %d\n",
sblock.fs_fsize);
exit(17);
}
if (sblock.fs_fsize < sectorsize) {
printf("increasing fragment size from %d to sector size (%d)\n",
sblock.fs_fsize, sectorsize);
sblock.fs_fsize = sectorsize;
}
if (sblock.fs_bsize > MAXBSIZE) {
printf("decreasing block size from %d to maximum (%d)\n",
sblock.fs_bsize, MAXBSIZE);
sblock.fs_bsize = MAXBSIZE;
}
if (sblock.fs_bsize < MINBSIZE) {
printf("increasing block size from %d to minimum (%d)\n",
sblock.fs_bsize, MINBSIZE);
sblock.fs_bsize = MINBSIZE;
}
if (sblock.fs_fsize > MAXBSIZE) {
printf("decreasing fragment size from %d to maximum (%d)\n",
sblock.fs_fsize, MAXBSIZE);
sblock.fs_fsize = MAXBSIZE;
}
if (sblock.fs_bsize < sblock.fs_fsize) {
printf("increasing block size from %d to fragment size (%d)\n",
sblock.fs_bsize, sblock.fs_fsize);
sblock.fs_bsize = sblock.fs_fsize;
}
if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) {
printf(
"increasing fragment size from %d to block size / %d (%d)\n",
sblock.fs_fsize, MAXFRAG, sblock.fs_bsize / MAXFRAG);
sblock.fs_fsize = sblock.fs_bsize / MAXFRAG;
}
if (maxbsize == 0)
maxbsize = bsize;
if (maxbsize < bsize || !POWEROF2(maxbsize)) {
sblock.fs_maxbsize = sblock.fs_bsize;
printf("Extent size set to %d\n", sblock.fs_maxbsize);
} else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) {
sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize;
printf("Extent size reduced to %d\n", sblock.fs_maxbsize);
} else {
sblock.fs_maxbsize = maxbsize;
}
/*
* Maxcontig sets the default for the maximum number of blocks
* that may be allocated sequentially. With file system clustering
* it is possible to allocate contiguous blocks up to the maximum
* transfer size permitted by the controller or buffering.
*/
if (maxcontig == 0)
maxcontig = MAX(1, MAXPHYS / bsize);
sblock.fs_maxcontig = maxcontig;
if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) {
sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize;
printf("Maxcontig raised to %d\n", sblock.fs_maxbsize);
}
if (sblock.fs_maxcontig > 1)
sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG);
sblock.fs_bmask = ~(sblock.fs_bsize - 1);
sblock.fs_fmask = ~(sblock.fs_fsize - 1);
sblock.fs_qbmask = ~sblock.fs_bmask;
sblock.fs_qfmask = ~sblock.fs_fmask;
sblock.fs_bshift = ilog2(sblock.fs_bsize);
sblock.fs_fshift = ilog2(sblock.fs_fsize);
sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize);
sblock.fs_fragshift = ilog2(sblock.fs_frag);
if (sblock.fs_frag > MAXFRAG) {
printf("fragment size %d is still too small (can't happen)\n",
sblock.fs_bsize / MAXFRAG);
exit(21);
}
sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize);
sblock.fs_size = fssize = dbtofsb(&sblock, fssize);
sblock.fs_providersize = dbtofsb(&sblock, mediasize / sectorsize);
/*
* Before the filesystem is finally initialized, mark it
* as incompletely initialized.
*/
sblock.fs_magic = FS_BAD_MAGIC;
if (Oflag == 1) {
sblock.fs_sblockloc = SBLOCK_UFS1;
sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t);
sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) *
sizeof(ufs1_daddr_t));
sblock.fs_old_inodefmt = FS_44INODEFMT;
sblock.fs_old_cgoffset = 0;
sblock.fs_old_cgmask = 0xffffffff;
sblock.fs_old_size = sblock.fs_size;
sblock.fs_old_rotdelay = 0;
sblock.fs_old_rps = 60;
sblock.fs_old_nspf = sblock.fs_fsize / sectorsize;
sblock.fs_old_cpg = 1;
sblock.fs_old_interleave = 1;
sblock.fs_old_trackskew = 0;
sblock.fs_old_cpc = 0;
sblock.fs_old_postblformat = 1;
sblock.fs_old_nrpos = 1;
} else {
sblock.fs_sblockloc = SBLOCK_UFS2;
sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t);
sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) *
sizeof(ufs2_daddr_t));
}
sblock.fs_sblkno =
roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize),
sblock.fs_frag);
sblock.fs_cblkno = sblock.fs_sblkno +
roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag);
sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) {
sizepb *= NINDIR(&sblock);
sblock.fs_maxfilesize += sizepb;
}
/*
* It's impossible to create a snapshot in case that fs_maxfilesize
* is smaller than the fssize.
*/
if (sblock.fs_maxfilesize < (u_quad_t)fssize) {
warnx("WARNING: You will be unable to create snapshots on this "
"file system. Correct by using a larger blocksize.");
}
/*
* Calculate the number of blocks to put into each cylinder group.
*
* This algorithm selects the number of blocks per cylinder
* group. The first goal is to have at least enough data blocks
* in each cylinder group to meet the density requirement. Once
* this goal is achieved we try to expand to have at least
* MINCYLGRPS cylinder groups. Once this goal is achieved, we
* pack as many blocks into each cylinder group map as will fit.
*
* We start by calculating the smallest number of blocks that we
* can put into each cylinder group. If this is too big, we reduce
* the density until it fits.
*/
maxinum = (((int64_t)(1)) << 32) - INOPB(&sblock);
minfragsperinode = 1 + fssize / maxinum;
if (density == 0) {
density = MAX(NFPI, minfragsperinode) * fsize;
} else if (density < minfragsperinode * fsize) {
origdensity = density;
density = minfragsperinode * fsize;
fprintf(stderr, "density increased from %d to %d\n",
origdensity, density);
}
origdensity = density;
for (;;) {
fragsperinode = MAX(numfrags(&sblock, density), 1);
if (fragsperinode < minfragsperinode) {
bsize <<= 1;
fsize <<= 1;
printf("Block size too small for a file system %s %d\n",
"of this size. Increasing blocksize to", bsize);
goto restart;
}
minfpg = fragsperinode * INOPB(&sblock);
if (minfpg > sblock.fs_size)
minfpg = sblock.fs_size;
sblock.fs_ipg = INOPB(&sblock);
sblock.fs_fpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_fpg < minfpg)
sblock.fs_fpg = minfpg;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
sblock.fs_fpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_fpg < minfpg)
sblock.fs_fpg = minfpg;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
break;
density -= sblock.fs_fsize;
}
if (density != origdensity)
printf("density reduced from %d to %d\n", origdensity, density);
/*
* Start packing more blocks into the cylinder group until
* it cannot grow any larger, the number of cylinder groups
* drops below MINCYLGRPS, or we reach the size requested.
* For UFS1 inodes per cylinder group are stored in an int16_t
* so fs_ipg is limited to 2^15 - 1.
*/
for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) {
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
if (Oflag > 1 || (Oflag == 1 && sblock.fs_ipg <= 0x7fff)) {
if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS)
break;
if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
continue;
if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize)
break;
}
sblock.fs_fpg -= sblock.fs_frag;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
break;
}
/*
* Check to be sure that the last cylinder group has enough blocks
* to be viable. If it is too small, reduce the number of blocks
* per cylinder group which will have the effect of moving more
* blocks into the last cylinder group.
*/
optimalfpg = sblock.fs_fpg;
for (;;) {
sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
lastminfpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_size < lastminfpg) {
printf("Filesystem size %jd < minimum size of %d\n",
(intmax_t)sblock.fs_size, lastminfpg);
exit(28);
}
if (sblock.fs_size % sblock.fs_fpg >= lastminfpg ||
sblock.fs_size % sblock.fs_fpg == 0)
break;
sblock.fs_fpg -= sblock.fs_frag;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
}
if (optimalfpg != sblock.fs_fpg)
printf("Reduced frags per cylinder group from %d to %d %s\n",
optimalfpg, sblock.fs_fpg, "to enlarge last cyl group");
sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock));
sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock);
if (Oflag == 1) {
sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf;
sblock.fs_old_nsect = sblock.fs_old_spc;
sblock.fs_old_npsect = sblock.fs_old_spc;
sblock.fs_old_ncyl = sblock.fs_ncg;
}
/*
* fill in remaining fields of the super block
*/
sblock.fs_csaddr = cgdmin(&sblock, 0);
sblock.fs_cssize =
fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
fscs = (struct csum *)calloc(1, sblock.fs_cssize);
if (fscs == NULL)
errx(31, "calloc failed");
sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs));
if (sblock.fs_sbsize > SBLOCKSIZE)
sblock.fs_sbsize = SBLOCKSIZE;
sblock.fs_minfree = minfree;
if (metaspace > 0 && metaspace < sblock.fs_fpg / 2)
sblock.fs_metaspace = blknum(&sblock, metaspace);
else if (metaspace != -1)
/* reserve half of minfree for metadata blocks */
sblock.fs_metaspace = blknum(&sblock,
(sblock.fs_fpg * minfree) / 200);
if (maxbpg == 0)
sblock.fs_maxbpg = MAXBLKPG(sblock.fs_bsize);
else
sblock.fs_maxbpg = maxbpg;
sblock.fs_optim = opt;
sblock.fs_cgrotor = 0;
sblock.fs_pendingblocks = 0;
sblock.fs_pendinginodes = 0;
sblock.fs_fmod = 0;
sblock.fs_ronly = 0;
sblock.fs_state = 0;
sblock.fs_clean = 1;
sblock.fs_id[0] = (long)utime;
sblock.fs_id[1] = newfs_random();
sblock.fs_fsmnt[0] = '\0';
csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize);
sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno -
sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno);
sblock.fs_cstotal.cs_nbfree =
fragstoblks(&sblock, sblock.fs_dsize) -
howmany(csfrags, sblock.fs_frag);
sblock.fs_cstotal.cs_nffree =
fragnum(&sblock, sblock.fs_size) +
(fragnum(&sblock, csfrags) > 0 ?
sblock.fs_frag - fragnum(&sblock, csfrags) : 0);
sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
sblock.fs_cstotal.cs_ndir = 0;
sblock.fs_dsize -= csfrags;
sblock.fs_time = utime;
if (Oflag == 1) {
sblock.fs_old_time = utime;
sblock.fs_old_dsize = sblock.fs_dsize;
sblock.fs_old_csaddr = sblock.fs_csaddr;
sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
}
/*
* Dump out summary information about file system.
*/
# define B2MBFACTOR (1 / (1024.0 * 1024.0))
printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
(intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
sblock.fs_fsize);
printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
if (sblock.fs_flags & FS_DOSOFTDEP)
printf("\twith soft updates\n");
# undef B2MBFACTOR
if (Eflag && !Nflag) {
printf("Erasing sectors [%jd...%jd]\n",
sblock.fs_sblockloc / disk.d_bsize,
fsbtodb(&sblock, sblock.fs_size) - 1);
berase(&disk, sblock.fs_sblockloc / disk.d_bsize,
sblock.fs_size * sblock.fs_fsize - sblock.fs_sblockloc);
}
/*
* Wipe out old UFS1 superblock(s) if necessary.
*/
if (!Nflag && Oflag != 1) {
i = bread(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE);
if (i == -1)
err(1, "can't read old UFS1 superblock: %s", disk.d_error);
if (fsdummy.fs_magic == FS_UFS1_MAGIC) {
fsdummy.fs_magic = 0;
bwrite(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize,
chdummy, SBLOCKSIZE);
for (cg = 0; cg < fsdummy.fs_ncg; cg++) {
if (fsbtodb(&fsdummy, cgsblock(&fsdummy, cg)) > fssize)
break;
bwrite(&disk, part_ofs + fsbtodb(&fsdummy,
cgsblock(&fsdummy, cg)), chdummy, SBLOCKSIZE);
}
}
}
if (!Nflag)
do_sbwrite(&disk);
if (Xflag == 1) {
printf("** Exiting on Xflag 1\n");
exit(0);
}
if (Xflag == 2)
printf("** Leaving BAD MAGIC on Xflag 2\n");
else
sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC;
/*
* Now build the cylinders group blocks and
* then print out indices of cylinder groups.
*/
printf("super-block backups (for fsck -b #) at:\n");
i = 0;
width = charsperline();
/*
* allocate space for superblock, cylinder group map, and
* two sets of inode blocks.
*/
if (sblock.fs_bsize < SBLOCKSIZE)
iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize;
else
iobufsize = 4 * sblock.fs_bsize;
if ((iobuf = calloc(1, iobufsize)) == 0) {
printf("Cannot allocate I/O buffer\n");
exit(38);
}
/*
* Make a copy of the superblock into the buffer that we will be
* writing out in each cylinder group.
*/
bcopy((char *)&sblock, iobuf, SBLOCKSIZE);
for (cg = 0; cg < sblock.fs_ncg; cg++) {
initcg(cg, utime);
j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s",
(intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cg)),
cg < (sblock.fs_ncg-1) ? "," : "");
if (j < 0)
tmpbuf[j = 0] = '\0';
if (i + j >= width) {
printf("\n");
i = 0;
}
i += j;
printf("%s", tmpbuf);
fflush(stdout);
}
printf("\n");
if (Nflag)
exit(0);
/*
* Now construct the initial file system,
* then write out the super-block.
*/
fsinit(utime);
if (Oflag == 1) {
sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
}
if (Xflag == 3) {
printf("** Exiting on Xflag 3\n");
exit(0);
}
if (!Nflag) {
do_sbwrite(&disk);
/*
* For UFS1 filesystems with a blocksize of 64K, the first
* alternate superblock resides at the location used for
* the default UFS2 superblock. As there is a valid
* superblock at this location, the boot code will use
* it as its first choice. Thus we have to ensure that
* all of its statistcs on usage are correct.
*/
if (Oflag == 1 && sblock.fs_bsize == 65536)
wtfs(fsbtodb(&sblock, cgsblock(&sblock, 0)),
sblock.fs_bsize, (char *)&sblock);
}
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize)
wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
sblock.fs_cssize - i < sblock.fs_bsize ?
sblock.fs_cssize - i : sblock.fs_bsize,
((char *)fscs) + i);
/*
* Update information about this partition in pack
* label, to that it may be updated on disk.
*/
if (pp != NULL) {
pp->p_fstype = FS_BSDFFS;
pp->p_fsize = sblock.fs_fsize;
pp->p_frag = sblock.fs_frag;
pp->p_cpg = sblock.fs_fpg;
}
}
void
fsinit(time_t utime)
{
union dinode node;
struct group *grp;
gid_t gid;
int entries;
memset(&node, 0, sizeof node);
if ((grp = getgrnam("operator")) != NULL) {
gid = grp->gr_gid;
} else {
warnx("Cannot retrieve operator gid, using gid 0.");
gid = 0;
}
entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT;
if (sblock.fs_magic == FS_UFS1_MAGIC) {
/*
* initialize the node
*/
node.dp1.di_atime = utime;
node.dp1.di_mtime = utime;
node.dp1.di_ctime = utime;
/*
* create the root directory
*/
node.dp1.di_mode = IFDIR | UMASK;
node.dp1.di_nlink = entries;
node.dp1.di_size = makedir(root_dir, entries);
node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
node.dp1.di_blocks =
btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO);
if (!nflag) {
/*
* create the .snap directory
*/
node.dp1.di_mode |= 020;
node.dp1.di_gid = gid;
node.dp1.di_nlink = SNAPLINKCNT;
node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp1.di_db[0] =
alloc(sblock.fs_fsize, node.dp1.di_mode);
node.dp1.di_blocks =
btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]),
sblock.fs_fsize, iobuf);
iput(&node, ROOTINO + 1);
}
} else {
/*
* initialize the node
*/
node.dp2.di_atime = utime;
node.dp2.di_mtime = utime;
node.dp2.di_ctime = utime;
node.dp2.di_birthtime = utime;
/*
* create the root directory
*/
node.dp2.di_mode = IFDIR | UMASK;
node.dp2.di_nlink = entries;
node.dp2.di_size = makedir(root_dir, entries);
node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode);
node.dp2.di_blocks =
btodb(fragroundup(&sblock, node.dp2.di_size));
wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO);
if (!nflag) {
/*
* create the .snap directory
*/
node.dp2.di_mode |= 020;
node.dp2.di_gid = gid;
node.dp2.di_nlink = SNAPLINKCNT;
node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp2.di_db[0] =
alloc(sblock.fs_fsize, node.dp2.di_mode);
node.dp2.di_blocks =
btodb(fragroundup(&sblock, node.dp2.di_size));
wtfs(fsbtodb(&sblock, node.dp2.di_db[0]),
sblock.fs_fsize, iobuf);
iput(&node, ROOTINO + 1);
}
}
}
/*
* Initialize a cylinder group.
*/
void
initcg(int cylno, time_t utime)
{
long blkno, start;
uint i, j, d, dlower, dupper;
ufs2_daddr_t cbase, dmax;
struct ufs1_dinode *dp1;
struct ufs2_dinode *dp2;
struct csum *cs;
/*
* Determine block bounds for cylinder group.
* Allow space for super block summary information in first
* cylinder group.
*/
cbase = cgbase(&sblock, cylno);
dmax = cbase + sblock.fs_fpg;
if (dmax > sblock.fs_size)
dmax = sblock.fs_size;
dlower = cgsblock(&sblock, cylno) - cbase;
dupper = cgdmin(&sblock, cylno) - cbase;
if (cylno == 0)
dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
cs = &fscs[cylno];
memset(&acg, 0, sblock.fs_cgsize);
acg.cg_time = utime;
acg.cg_magic = CG_MAGIC;
acg.cg_cgx = cylno;
acg.cg_niblk = sblock.fs_ipg;
acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
sblock.fs_ipg : 2 * INOPB(&sblock);
acg.cg_ndblk = dmax - cbase;
if (sblock.fs_contigsumsize > 0)
acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
if (Oflag == 2) {
acg.cg_iusedoff = start;
} else {
acg.cg_old_ncyl = sblock.fs_old_cpg;
acg.cg_old_time = acg.cg_time;
acg.cg_time = 0;
acg.cg_old_niblk = acg.cg_niblk;
acg.cg_niblk = 0;
acg.cg_initediblk = 0;
acg.cg_old_btotoff = start;
acg.cg_old_boff = acg.cg_old_btotoff +
sblock.fs_old_cpg * sizeof(int32_t);
acg.cg_iusedoff = acg.cg_old_boff +
sblock.fs_old_cpg * sizeof(u_int16_t);
}
acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
if (sblock.fs_contigsumsize > 0) {
acg.cg_clustersumoff =
roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
acg.cg_clustersumoff -= sizeof(u_int32_t);
acg.cg_clusteroff = acg.cg_clustersumoff +
(sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
acg.cg_nextfreeoff = acg.cg_clusteroff +
howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
}
if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
printf("Panic: cylinder group too big\n");
exit(37);
}
acg.cg_cs.cs_nifree += sblock.fs_ipg;
if (cylno == 0)
for (i = 0; i < (long)ROOTINO; i++) {
setbit(cg_inosused(&acg), i);
acg.cg_cs.cs_nifree--;
}
if (cylno > 0) {
/*
* In cylno 0, beginning space is reserved
* for boot and super blocks.
*/
for (d = 0; d < dlower; d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0)
setbit(cg_clustersfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
}
}
if ((i = dupper % sblock.fs_frag)) {
acg.cg_frsum[sblock.fs_frag - i]++;
for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
setbit(cg_blksfree(&acg), dupper);
acg.cg_cs.cs_nffree++;
}
}
for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
if (sblock.fs_contigsumsize > 0)
setbit(cg_clustersfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
}
if (d < acg.cg_ndblk) {
acg.cg_frsum[acg.cg_ndblk - d]++;
for (; d < acg.cg_ndblk; d++) {
setbit(cg_blksfree(&acg), d);
acg.cg_cs.cs_nffree++;
}
}
if (sblock.fs_contigsumsize > 0) {
int32_t *sump = cg_clustersum(&acg);
u_char *mapp = cg_clustersfree(&acg);
int map = *mapp++;
int bit = 1;
int run = 0;
for (i = 0; i < acg.cg_nclusterblks; i++) {
if ((map & bit) != 0)
run++;
else if (run != 0) {
if (run > sblock.fs_contigsumsize)
run = sblock.fs_contigsumsize;
sump[run]++;
run = 0;
}
if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1)
bit <<= 1;
else {
map = *mapp++;
bit = 1;
}
}
if (run != 0) {
if (run > sblock.fs_contigsumsize)
run = sblock.fs_contigsumsize;
sump[run]++;
}
}
*cs = acg.cg_cs;
/*
* Write out the duplicate super block, the cylinder group map
* and two blocks worth of inodes in a single write.
*/
start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE;
bcopy((char *)&acg, &iobuf[start], sblock.fs_cgsize);
start += sblock.fs_bsize;
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
dp2 = (struct ufs2_dinode *)(&iobuf[start]);
for (i = 0; i < acg.cg_initediblk; i++) {
if (sblock.fs_magic == FS_UFS1_MAGIC) {
dp1->di_gen = newfs_random();
dp1++;
} else {
dp2->di_gen = newfs_random();
dp2++;
}
}
wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf);
/*
* For the old file system, we have to initialize all the inodes.
*/
if (Oflag == 1) {
for (i = 2 * sblock.fs_frag;
i < sblock.fs_ipg / INOPF(&sblock);
i += sblock.fs_frag) {
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
for (j = 0; j < INOPB(&sblock); j++) {
dp1->di_gen = newfs_random();
dp1++;
}
wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
sblock.fs_bsize, &iobuf[start]);
}
}
}
/*
* Initialize a cylinder group.
*/
void
initcg(int cylno, time_t utime)
{
int i, j, d, dlower, dupper, blkno, start;
daddr64_t cbase, dmax;
struct ufs1_dinode *dp1;
struct ufs2_dinode *dp2;
struct csum *cs;
/*
* Determine block bounds for cylinder group. Allow space for
* super block summary information in first cylinder group.
*/
cbase = cgbase(&sblock, cylno);
dmax = cbase + sblock.fs_fpg;
if (dmax > sblock.fs_size)
dmax = sblock.fs_size;
if (fsbtodb(&sblock, cgsblock(&sblock, cylno)) + iobufsize / sectorsize
> fssize)
errx(40, "inode table does not fit in cylinder group");
dlower = cgsblock(&sblock, cylno) - cbase;
dupper = cgdmin(&sblock, cylno) - cbase;
if (cylno == 0)
dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
cs = &fscs[cylno];
memset(&acg, 0, sblock.fs_cgsize);
acg.cg_ffs2_time = utime;
acg.cg_magic = CG_MAGIC;
acg.cg_cgx = cylno;
acg.cg_ffs2_niblk = sblock.fs_ipg;
acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
acg.cg_ndblk = dmax - cbase;
start = sizeof(struct cg);
if (Oflag <= 1) {
/* Hack to maintain compatibility with old fsck. */
if (cylno == sblock.fs_ncg - 1)
acg.cg_ncyl = 0;
else
acg.cg_ncyl = sblock.fs_cpg;
acg.cg_time = acg.cg_ffs2_time;
acg.cg_ffs2_time = 0;
acg.cg_niblk = acg.cg_ffs2_niblk;
acg.cg_ffs2_niblk = 0;
acg.cg_initediblk = 0;
acg.cg_btotoff = start;
acg.cg_boff = acg.cg_btotoff + sblock.fs_cpg * sizeof(int32_t);
acg.cg_iusedoff = acg.cg_boff +
sblock.fs_cpg * sizeof(u_int16_t);
} else {
acg.cg_iusedoff = start;
}
acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
if (acg.cg_nextfreeoff > sblock.fs_cgsize)
errx(37, "panic: cylinder group too big: %d > %d",
acg.cg_nextfreeoff, sblock.fs_cgsize);
acg.cg_cs.cs_nifree += sblock.fs_ipg;
if (cylno == 0) {
for (i = 0; i < ROOTINO; i++) {
setbit(cg_inosused(&acg), i);
acg.cg_cs.cs_nifree--;
}
}
if (cylno > 0) {
/*
* In cylno 0, space is reserved for boot and super blocks.
*/
for (d = 0; d < dlower; d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
if (Oflag <= 1) {
cg_blktot(&acg)[cbtocylno(&sblock, d)]++;
cg_blks(&sblock, &acg, cbtocylno(&sblock, d))
[cbtorpos(&sblock, d)]++;
}
}
}
if ((i = dupper % sblock.fs_frag)) {
acg.cg_frsum[sblock.fs_frag - i]++;
for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
setbit(cg_blksfree(&acg), dupper);
acg.cg_cs.cs_nffree++;
}
}
for (d = dupper;
d + sblock.fs_frag <= acg.cg_ndblk;
d += sblock.fs_frag) {
blkno = d / sblock.fs_frag;
setblock(&sblock, cg_blksfree(&acg), blkno);
acg.cg_cs.cs_nbfree++;
if (Oflag <= 1) {
cg_blktot(&acg)[cbtocylno(&sblock, d)]++;
cg_blks(&sblock, &acg, cbtocylno(&sblock, d))
[cbtorpos(&sblock, d)]++;
}
}
if (d < acg.cg_ndblk) {
acg.cg_frsum[acg.cg_ndblk - d]++;
for (; d < acg.cg_ndblk; d++) {
setbit(cg_blksfree(&acg), d);
acg.cg_cs.cs_nffree++;
}
}
*cs = acg.cg_cs;
/*
* Write out the duplicate superblock, the cylinder group map
* and two blocks worth of inodes in a single write.
*/
start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE;
bcopy((char *)&acg, &iobuf[start], sblock.fs_cgsize);
start += sblock.fs_bsize;
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
dp2 = (struct ufs2_dinode *)(&iobuf[start]);
for (i = MIN(sblock.fs_ipg, 2 * INOPB(&sblock)); i != 0; i--) {
if (sblock.fs_magic == FS_UFS1_MAGIC) {
dp1->di_gen = (u_int32_t)arc4random();
dp1++;
} else {
dp2->di_gen = (u_int32_t)arc4random();
dp2++;
}
}
wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf);
if (Oflag <= 1) {
/* Initialize inodes for FFS1. */
for (i = 2 * sblock.fs_frag;
i < sblock.fs_ipg / INOPF(&sblock);
i += sblock.fs_frag) {
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
for (j = 0; j < INOPB(&sblock); j++) {
dp1->di_gen = (u_int32_t)arc4random();
dp1++;
}
wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
sblock.fs_bsize, &iobuf[start]);
}
}
}
void
mkfs(struct partition *pp, char *fsys, int fi, int fo, mode_t mfsmode,
uid_t mfsuid, gid_t mfsgid)
{
time_t utime;
quad_t sizepb;
int i, j, width, origdensity, fragsperinode, minfpg, optimalfpg;
int lastminfpg, mincylgrps;
long cylno, csfrags;
char tmpbuf[100]; /* XXX this will break in about 2,500 years */
if ((fsun = calloc(1, sizeof (union fs_u))) == NULL ||
(cgun = calloc(1, sizeof (union cg_u))) == NULL)
err(1, "calloc");
#ifndef STANDALONE
time(&utime);
#endif
if (mfs) {
quad_t sz = (quad_t)fssize * sectorsize;
if (sz > SIZE_T_MAX) {
errno = ENOMEM;
err(12, "mmap");
}
membase = mmap(NULL, sz, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, (off_t)0);
if (membase == MAP_FAILED)
err(12, "mmap");
madvise(membase, sz, MADV_RANDOM);
}
fsi = fi;
fso = fo;
/*
* Validate the given file system size.
* Verify that its last block can actually be accessed.
*/
if (Oflag <= 1 && fssize > INT_MAX)
errx(13, "preposterous size %lld, max is %d", fssize, INT_MAX);
if (Oflag == 2 && fssize > MAXDISKSIZE)
errx(13, "preposterous size %lld, max is %lld", fssize,
MAXDISKSIZE);
wtfs(fssize - 1, sectorsize, (char *)&sblock);
sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
sblock.fs_avgfilesize = avgfilesize;
sblock.fs_avgfpdir = avgfilesperdir;
/*
* Collect and verify the block and fragment sizes.
*/
if (!POWEROF2(bsize)) {
errx(16, "block size must be a power of 2, not %d", bsize);
}
if (!POWEROF2(fsize)) {
errx(17, "fragment size must be a power of 2, not %d",
fsize);
}
if (fsize < sectorsize) {
errx(18, "fragment size %d is too small, minimum is %d",
fsize, sectorsize);
}
if (bsize < MINBSIZE) {
errx(19, "block size %d is too small, minimum is %d",
bsize, MINBSIZE);
}
if (bsize > MAXBSIZE) {
errx(19, "block size %d is too large, maximum is %d",
bsize, MAXBSIZE);
}
if (bsize < fsize) {
errx(20, "block size (%d) cannot be smaller than fragment size (%d)",
bsize, fsize);
}
sblock.fs_bsize = bsize;
sblock.fs_fsize = fsize;
/*
* Calculate the superblock bitmasks and shifts.
*/
sblock.fs_bmask = ~(sblock.fs_bsize - 1);
sblock.fs_fmask = ~(sblock.fs_fsize - 1);
sblock.fs_qbmask = ~sblock.fs_bmask;
sblock.fs_qfmask = ~sblock.fs_fmask;
sblock.fs_bshift = ilog2(sblock.fs_bsize);
sblock.fs_fshift = ilog2(sblock.fs_fsize);
sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize);
if (sblock.fs_frag > MAXFRAG) {
errx(21, "fragment size %d is too small, minimum with block "
"size %d is %d", sblock.fs_fsize, sblock.fs_bsize,
sblock.fs_bsize / MAXFRAG);
}
sblock.fs_fragshift = ilog2(sblock.fs_frag);
sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize);
sblock.fs_size = dbtofsb(&sblock, fssize);
sblock.fs_nspf = sblock.fs_fsize / sectorsize;
sblock.fs_maxcontig = 1;
sblock.fs_nrpos = 1;
sblock.fs_cpg = 1;
/*
* Before the file system is fully initialized, mark it as invalid.
*/
sblock.fs_magic = FS_BAD_MAGIC;
/*
* Set the remaining superblock fields. Note that for FFS1, media
* geometry fields are set to fake values. This is for compatibility
* with really ancient kernels that might still inspect these values.
*/
if (Oflag <= 1) {
sblock.fs_sblockloc = SBLOCK_UFS1;
sblock.fs_nindir = sblock.fs_bsize / sizeof(int32_t);
sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
if (Oflag == 0) {
sblock.fs_maxsymlinklen = 0;
sblock.fs_inodefmt = FS_42INODEFMT;
} else {
sblock.fs_maxsymlinklen = MAXSYMLINKLEN_UFS1;
sblock.fs_inodefmt = FS_44INODEFMT;
}
sblock.fs_cgoffset = 0;
sblock.fs_cgmask = 0xffffffff;
sblock.fs_ffs1_size = sblock.fs_size;
sblock.fs_rotdelay = 0;
sblock.fs_rps = 60;
sblock.fs_interleave = 1;
sblock.fs_trackskew = 0;
sblock.fs_cpc = 0;
} else {
sblock.fs_inodefmt = FS_44INODEFMT;
sblock.fs_sblockloc = SBLOCK_UFS2;
sblock.fs_nindir = sblock.fs_bsize / sizeof(int64_t);
sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
sblock.fs_maxsymlinklen = MAXSYMLINKLEN_UFS2;
}
sblock.fs_sblkno =
roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize),
sblock.fs_frag);
sblock.fs_cblkno = (int32_t)(sblock.fs_sblkno +
roundup(howmany(SBSIZE, sblock.fs_fsize), sblock.fs_frag));
sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) {
sizepb *= NINDIR(&sblock);
sblock.fs_maxfilesize += sizepb;
}
#ifdef notyet
/*
* It is impossible to create a snapshot in case fs_maxfilesize is
* smaller than fssize.
*/
if (sblock.fs_maxfilesize < (u_quad_t)fssize)
warnx("WARNING: You will be unable to create snapshots on this "
"file system. Correct by using a larger blocksize.");
#endif
/*
* Calculate the number of blocks to put into each cylinder group. The
* first goal is to have at least enough data blocks in each cylinder
* group to meet the density requirement. Once this goal is achieved
* we try to expand to have at least mincylgrps cylinder groups. Once
* this goal is achieved, we pack as many blocks into each cylinder
* group map as will fit.
*
* We start by calculating the smallest number of blocks that we can
* put into each cylinder group. If this is too big, we reduce the
* density until it fits.
*/
origdensity = density;
for (;;) {
fragsperinode = MAX(numfrags(&sblock, density), 1);
minfpg = fragsperinode * INOPB(&sblock);
if (minfpg > sblock.fs_size)
minfpg = sblock.fs_size;
sblock.fs_ipg = INOPB(&sblock);
sblock.fs_fpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_fpg < minfpg)
sblock.fs_fpg = minfpg;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
sblock.fs_fpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_fpg < minfpg)
sblock.fs_fpg = minfpg;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
break;
density -= sblock.fs_fsize;
}
if (density != origdensity)
warnx("density reduced from %d to %d bytes per inode",
origdensity, density);
/*
* Use a lower value for mincylgrps if the user specified a large
* number of blocks per cylinder group. This is needed for, e.g. the
* install media which needs to pack 2 files very tightly.
*/
mincylgrps = MINCYLGRPS;
if (maxfrgspercg != INT_MAX) {
i = sblock.fs_size / maxfrgspercg;
if (i < MINCYLGRPS)
mincylgrps = i <= 0 ? 1 : i;
}
/*
* Start packing more blocks into the cylinder group until it cannot
* grow any larger, the number of cylinder groups drops below
* mincylgrps, or we reach the requested size.
*/
for (;;) {
sblock.fs_fpg += sblock.fs_frag;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
if (sblock.fs_fpg > maxfrgspercg ||
sblock.fs_size / sblock.fs_fpg < mincylgrps ||
CGSIZE(&sblock) > (unsigned long)sblock.fs_bsize)
break;
}
sblock.fs_fpg -= sblock.fs_frag;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
if (sblock.fs_fpg > maxfrgspercg)
warnx("can't honour -c: minimum is %d", sblock.fs_fpg);
/*
* Check to be sure that the last cylinder group has enough blocks to
* be viable. If it is too small, reduce the number of blocks per
* cylinder group which will have the effect of moving more blocks into
* the last cylinder group.
*/
optimalfpg = sblock.fs_fpg;
for (;;) {
sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
lastminfpg = roundup(sblock.fs_iblkno +
sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
if (sblock.fs_size < lastminfpg)
errx(28, "file system size %jd < minimum size of %d",
(intmax_t)sblock.fs_size, lastminfpg);
if (sblock.fs_size % sblock.fs_fpg >= lastminfpg ||
sblock.fs_size % sblock.fs_fpg == 0)
break;
sblock.fs_fpg -= sblock.fs_frag;
sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
INOPB(&sblock));
}
if (optimalfpg != sblock.fs_fpg)
warnx("reduced number of fragments per cylinder group from %d"
" to %d to enlarge last cylinder group", optimalfpg,
sblock.fs_fpg);
/*
* Back to filling superblock fields.
*/
if (Oflag <= 1) {
sblock.fs_spc = sblock.fs_fpg * sblock.fs_nspf;
sblock.fs_nsect = sblock.fs_spc;
sblock.fs_npsect = sblock.fs_spc;
sblock.fs_ncyl = sblock.fs_ncg;
}
sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock));
sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock);
sblock.fs_csaddr = cgdmin(&sblock, 0);
sblock.fs_cssize =
fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
fscs = (struct csum *)calloc(1, sblock.fs_cssize);
if (fscs == NULL)
errx(31, "calloc failed");
sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs));
if (sblock.fs_sbsize > SBLOCKSIZE)
sblock.fs_sbsize = SBLOCKSIZE;
sblock.fs_minfree = minfree;
sblock.fs_maxbpg = maxbpg;
sblock.fs_optim = opt;
sblock.fs_cgrotor = 0;
sblock.fs_pendingblocks = 0;
sblock.fs_pendinginodes = 0;
sblock.fs_fmod = 0;
sblock.fs_ronly = 0;
sblock.fs_state = 0;
sblock.fs_clean = 1;
sblock.fs_id[0] = (u_int32_t)utime;
sblock.fs_id[1] = (u_int32_t)arc4random();
sblock.fs_fsmnt[0] = '\0';
csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize);
sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno -
sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno);
sblock.fs_cstotal.cs_nbfree = fragstoblks(&sblock, sblock.fs_dsize) -
howmany(csfrags, sblock.fs_frag);
sblock.fs_cstotal.cs_nffree = fragnum(&sblock, sblock.fs_size) +
(fragnum(&sblock, csfrags) > 0 ?
sblock.fs_frag - fragnum(&sblock, csfrags) : 0);
sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
sblock.fs_cstotal.cs_ndir = 0;
sblock.fs_dsize -= csfrags;
sblock.fs_time = utime;
if (Oflag <= 1) {
sblock.fs_ffs1_time = sblock.fs_time;
sblock.fs_ffs1_dsize = sblock.fs_dsize;
sblock.fs_ffs1_csaddr = sblock.fs_csaddr;
sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
}
/*
* Dump out summary information about file system.
*/
if (!mfs) {
#define B2MBFACTOR (1 / (1024.0 * 1024.0))
printf("%s: %.1fMB in %jd sectors of %d bytes\n", fsys,
(float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
(intmax_t)fsbtodb(&sblock, sblock.fs_size), sectorsize);
printf("%d cylinder groups of %.2fMB, %d blocks, %d"
" inodes each\n", sblock.fs_ncg,
(float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
#undef B2MBFACTOR
}
/*
* Wipe out old FFS1 superblock if necessary.
*/
if (Oflag >= 2) {
union fs_u *fsun1;
struct fs *fs1;
fsun1 = calloc(1, sizeof(union fs_u));
if (fsun1 == NULL)
err(39, "calloc");
fs1 = &fsun1->fs;
rdfs(SBLOCK_UFS1 / sectorsize, SBSIZE, (char *)fs1);
if (fs1->fs_magic == FS_UFS1_MAGIC) {
fs1->fs_magic = FS_BAD_MAGIC;
wtfs(SBLOCK_UFS1 / sectorsize, SBSIZE, (char *)fs1);
}
free(fsun1);
}
wtfs((int)sblock.fs_sblockloc / sectorsize, SBSIZE, (char *)&sblock);
sblock.fs_magic = (Oflag <= 1) ? FS_UFS1_MAGIC : FS_UFS2_MAGIC;
/*
* Now build the cylinders group blocks and
* then print out indices of cylinder groups.
*/
if (!quiet)
printf("super-block backups (for fsck -b #) at:\n");
#ifndef STANDALONE
else if (!mfs && isatty(STDIN_FILENO)) {
signal(SIGINFO, siginfo);
cur_fsys = fsys;
}
#endif
i = 0;
width = charsperline();
/*
* Allocate space for superblock, cylinder group map, and two sets of
* inode blocks.
*/
if (sblock.fs_bsize < SBLOCKSIZE)
iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize;
else
iobufsize = 4 * sblock.fs_bsize;
if ((iobuf = malloc(iobufsize)) == 0)
errx(38, "cannot allocate I/O buffer");
bzero(iobuf, iobufsize);
/*
* Make a copy of the superblock into the buffer that we will be
* writing out in each cylinder group.
*/
bcopy((char *)&sblock, iobuf, SBLOCKSIZE);
for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
cur_cylno = (sig_atomic_t)cylno;
initcg(cylno, utime);
if (quiet)
continue;
j = snprintf(tmpbuf, sizeof tmpbuf, " %lld,",
fsbtodb(&sblock, cgsblock(&sblock, cylno)));
if (j >= sizeof tmpbuf)
j = sizeof tmpbuf - 1;
if (j == -1 || i+j >= width) {
printf("\n");
i = 0;
}
i += j;
printf("%s", tmpbuf);
fflush(stdout);
}
if (!quiet)
printf("\n");
if (Nflag && !mfs)
exit(0);
/*
* Now construct the initial file system, then write out the superblock.
*/
if (Oflag <= 1) {
if (fsinit1(utime, mfsmode, mfsuid, mfsgid))
errx(32, "fsinit1 failed");
sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
} else {
if (fsinit2(utime))
errx(32, "fsinit2 failed");
}
wtfs((int)sblock.fs_sblockloc / sectorsize, SBSIZE, (char *)&sblock);
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize)
wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
sblock.fs_cssize - i < sblock.fs_bsize ?
sblock.fs_cssize - i : sblock.fs_bsize,
((char *)fscs) + i);
/*
* Update information about this partion in pack label, to that it may
* be updated on disk.
*/
pp->p_fstype = FS_BSDFFS;
pp->p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(sblock.fs_fsize, sblock.fs_frag);
pp->p_cpg = sblock.fs_cpg;
}
/*
* Initialize a cylinder (block) group.
*/
void
initcg(uint cylno)
{
uint nblcg, i, j, sboff;
struct ext2fs_dinode *dp;
/*
* Make a copy of the superblock and group descriptors.
*/
if (sblock.e2fs.e2fs_rev == E2FS_REV0 ||
(sblock.e2fs.e2fs_features_rocompat &
EXT2F_ROCOMPAT_SPARSESUPER) == 0 ||
cg_has_sb(cylno)) {
sblock.e2fs.e2fs_block_group_nr = cylno;
sboff = 0;
if (cgbase(&sblock, cylno) == 0) {
/* preserve data in bootblock in cg0 */
sboff = SBOFF;
}
e2fs_sbsave(&sblock.e2fs, (struct ext2fs *)(iobuf + sboff));
e2fs_cgsave(gd, (struct ext2_gd *)(iobuf +
sblock.e2fs_bsize * NBLOCK_SUPERBLOCK),
sizeof(struct ext2_gd) * sblock.e2fs_ncg);
/* write superblock and group descriptor backups */
wtfs(fsbtodb(&sblock, cgbase(&sblock, cylno)) +
sboff / sectorsize, iobufsize - sboff, iobuf + sboff);
}
/*
* Initialize block bitmap.
*/
memset(buf, 0, sblock.e2fs_bsize);
if (cylno == (sblock.e2fs_ncg - 1)) {
/* The last group could have less blocks than e2fs_bpg. */
nblcg = sblock.e2fs.e2fs_bcount -
cgbase(&sblock, sblock.e2fs_ncg - 1);
for (i = nblcg; i < roundup(nblcg, NBBY); i++)
setbit(buf, i);
memset(&buf[i / NBBY], ~0U, sblock.e2fs.e2fs_bpg - i);
}
/* set overhead (superblock, group descriptor etc.) blocks used */
for (i = 0; i < cgoverhead(cylno) / NBBY; i++)
buf[i] = ~0;
i = i * NBBY;
for (; i < cgoverhead(cylno); i++)
setbit(buf, i);
wtfs(fsbtodb(&sblock, gd[cylno].ext2bgd_b_bitmap), sblock.e2fs_bsize,
buf);
/*
* Initialize inode bitmap.
*
* Assume e2fs_ipg is a multiple of NBBY since
* it's a multiple of e2fs_ipb (as we did above).
* Note even (possibly smaller) the last group has the same e2fs_ipg.
*/
assert(!(sblock.e2fs.e2fs_ipg % NBBY));
i = sblock.e2fs.e2fs_ipg / NBBY;
memset(buf, 0, i);
assert(sblock.e2fs_bsize >= i);
memset(buf + i, ~0U, sblock.e2fs_bsize - i);
if (cylno == 0) {
/* mark reserved inodes */
for (i = 1; i < EXT2_FIRSTINO; i++)
setbit(buf, EXT2_INO_INDEX(i));
}
wtfs(fsbtodb(&sblock, gd[cylno].ext2bgd_i_bitmap), sblock.e2fs_bsize,
buf);
/*
* Initialize inode tables.
*
* Just initialize generation numbers for NFS security.
* XXX: sys/ufs/ext2fs/ext2fs_alloc.c:ext2fs_valloc() seems
* to override these generated numbers.
*/
memset(buf, 0, sblock.e2fs_bsize);
for (i = 0; i < sblock.e2fs_itpg; i++) {
for (j = 0; j < sblock.e2fs_ipb; j++) {
dp = (struct ext2fs_dinode *)(buf + inodesize * j);
/* h2fs32() just for consistency */
dp->e2di_gen = h2fs32(arc4random());
}
wtfs(fsbtodb(&sblock, gd[cylno].ext2bgd_i_tables + i),
sblock.e2fs_bsize, buf);
}
}
void
mke2fs(const char *fsys, int fi, int fo)
{
struct timeval tv;
int64_t minfssize;
uint bcount, fbcount, ficount;
uint blocks_gd, blocks_per_cg, inodes_per_cg, iblocks_per_cg;
uint minblocks_per_cg, blocks_lastcg;
uint ncg, cylno, sboff;
uuid_t uuid;
uint32_t uustat;
int i, len, col, delta, fld_width, max_cols;
struct winsize winsize;
gettimeofday(&tv, NULL);
fsi = fi;
fso = fo;
/*
* collect and verify the block and fragment sizes
*/
if (!powerof2(bsize)) {
errx(EXIT_FAILURE,
"block size must be a power of 2, not %u\n",
bsize);
}
if (!powerof2(fsize)) {
errx(EXIT_FAILURE,
"fragment size must be a power of 2, not %u\n",
fsize);
}
if (fsize < sectorsize) {
errx(EXIT_FAILURE,
"fragment size %u is too small, minimum is %u\n",
fsize, sectorsize);
}
if (bsize < MINBSIZE) {
errx(EXIT_FAILURE,
"block size %u is too small, minimum is %u\n",
bsize, MINBSIZE);
}
if (bsize > EXT2_MAXBSIZE) {
errx(EXIT_FAILURE,
"block size %u is too large, maximum is %u\n",
bsize, MAXBSIZE);
}
if (bsize != fsize) {
/*
* There is no fragment support on current ext2fs (yet?),
* but some kernel code refers fsize or fpg as bsize or bpg
* and Linux seems to set the same values to them.
*/
errx(EXIT_FAILURE,
"block size (%u) can't be different from "
"fragment size (%u)\n",
bsize, fsize);
}
/* variable inodesize is REV1 feature */
if (Oflag == 0 && inodesize != EXT2_REV0_DINODE_SIZE) {
errx(EXIT_FAILURE, "GOOD_OLD_REV file system format"
" doesn't support %d byte inode\n", inodesize);
}
sblock.e2fs.e2fs_log_bsize = ilog2(bsize) - LOG_MINBSIZE;
/* Umm, why not e2fs_log_fsize? */
sblock.e2fs.e2fs_fsize = ilog2(fsize) - LOG_MINBSIZE;
sblock.e2fs_bsize = bsize;
sblock.e2fs_bshift = sblock.e2fs.e2fs_log_bsize + LOG_MINBSIZE;
sblock.e2fs_qbmask = sblock.e2fs_bsize - 1;
sblock.e2fs_bmask = ~sblock.e2fs_qbmask;
sblock.e2fs_fsbtodb = ilog2(sblock.e2fs_bsize) - ilog2(sectorsize);
sblock.e2fs_ipb = sblock.e2fs_bsize / inodesize;
/*
* Ext2fs preserves BBSIZE (1024 bytes) space at the top for
* bootloader (though it is not enough at all for our bootloader).
* If bsize == BBSIZE we have to preserve one block.
* If bsize > BBSIZE, the first block already contains BBSIZE space
* before superblock because superblock is allocated at SBOFF and
* bsize is a power of two (i.e. 2048 bytes or more).
*/
sblock.e2fs.e2fs_first_dblock = (sblock.e2fs_bsize > BBSIZE) ? 0 : 1;
minfssize = fsbtodb(&sblock,
sblock.e2fs.e2fs_first_dblock +
NBLOCK_SUPERBLOCK +
1 /* at least one group descriptor */ +
NBLOCK_BLOCK_BITMAP +
NBLOCK_INODE_BITMAP +
1 /* at least one inode table block */ +
1 /* at least one data block for rootdir */ +
1 /* at least one data block for data */
); /* XXX and more? */
if (fssize < minfssize)
errx(EXIT_FAILURE, "Filesystem size %" PRId64
" < minimum size of %" PRId64 "\n", fssize, minfssize);
bcount = dbtofsb(&sblock, fssize);
/*
* While many people claim that ext2fs is a (bad) clone of ufs/ffs,
* it isn't actual ffs so maybe we should call it "block group"
* as their native name rather than ffs derived "cylinder group."
* But we'll use the latter here since other kernel sources use it.
* (I also agree "cylinder" based allocation is obsolete though)
*/
/* maybe "simple is the best" */
blocks_per_cg = sblock.e2fs_bsize * NBBY;
ncg = howmany(bcount - sblock.e2fs.e2fs_first_dblock, blocks_per_cg);
blocks_gd = howmany(sizeof(struct ext2_gd) * ncg, bsize);
/* check range of inode number */
if (num_inodes < EXT2_FIRSTINO)
num_inodes = EXT2_FIRSTINO; /* needs reserved inodes + 1 */
if (num_inodes > UINT16_MAX * ncg)
num_inodes = UINT16_MAX * ncg; /* ext2bgd_nifree is uint16_t */
inodes_per_cg = num_inodes / ncg;
iblocks_per_cg = howmany(inodesize * inodes_per_cg, bsize);
/* Check that the last cylinder group has enough space for inodes */
minblocks_per_cg =
NBLOCK_BLOCK_BITMAP +
NBLOCK_INODE_BITMAP +
iblocks_per_cg +
1; /* at least one data block */
if (Oflag == 0 || cg_has_sb(ncg - 1) != 0)
minblocks_per_cg += NBLOCK_SUPERBLOCK + blocks_gd;
blocks_lastcg = bcount - sblock.e2fs.e2fs_first_dblock -
blocks_per_cg * (ncg - 1);
if (blocks_lastcg < minblocks_per_cg) {
/*
* Since we make all the cylinder groups the same size, the
* last will only be small if there are more than one
* cylinder groups. If the last one is too small to store
* filesystem data, just kill it.
*
* XXX: Does fsck_ext2fs(8) properly handle this case?
*/
bcount -= blocks_lastcg;
ncg--;
blocks_lastcg = blocks_per_cg;
blocks_gd = howmany(sizeof(struct ext2_gd) * ncg, bsize);
inodes_per_cg = num_inodes / ncg;
}
/* roundup inodes_per_cg to make it use whole inode table blocks */
inodes_per_cg = roundup(inodes_per_cg, sblock.e2fs_ipb);
num_inodes = inodes_per_cg * ncg;
iblocks_per_cg = inodes_per_cg / sblock.e2fs_ipb;
/* XXX: probably we should check these adjusted values again */
sblock.e2fs.e2fs_bcount = bcount;
sblock.e2fs.e2fs_icount = num_inodes;
sblock.e2fs_ncg = ncg;
sblock.e2fs_ngdb = blocks_gd;
sblock.e2fs_itpg = iblocks_per_cg;
sblock.e2fs.e2fs_rbcount = sblock.e2fs.e2fs_bcount * minfree / 100;
/* e2fs_fbcount will be accounted later */
/* e2fs_ficount will be accounted later */
sblock.e2fs.e2fs_bpg = blocks_per_cg;
sblock.e2fs.e2fs_fpg = blocks_per_cg;
sblock.e2fs.e2fs_ipg = inodes_per_cg;
sblock.e2fs.e2fs_mtime = 0;
sblock.e2fs.e2fs_wtime = tv.tv_sec;
sblock.e2fs.e2fs_mnt_count = 0;
/* XXX: should add some entropy to avoid checking all fs at once? */
sblock.e2fs.e2fs_max_mnt_count = EXT2_DEF_MAX_MNT_COUNT;
sblock.e2fs.e2fs_magic = E2FS_MAGIC;
sblock.e2fs.e2fs_state = E2FS_ISCLEAN;
sblock.e2fs.e2fs_beh = E2FS_BEH_DEFAULT;
sblock.e2fs.e2fs_minrev = 0;
sblock.e2fs.e2fs_lastfsck = tv.tv_sec;
sblock.e2fs.e2fs_fsckintv = EXT2_DEF_FSCKINTV;
/*
* Maybe we can use E2FS_OS_FREEBSD here and it would be more proper,
* but the purpose of this newfs_ext2fs(8) command is to provide
* a filesystem which can be recognized by firmware on some
* Linux based appliances that can load bootstrap files only from
* (their native) ext2fs, and anyway we will (and should) try to
* act like them as much as possible.
*
* Anyway, I hope that all newer such boxes will keep their support
* for the "GOOD_OLD_REV" ext2fs.
*/
sblock.e2fs.e2fs_creator = E2FS_OS_LINUX;
if (Oflag == 0) {
sblock.e2fs.e2fs_rev = E2FS_REV0;
sblock.e2fs.e2fs_features_compat = 0;
sblock.e2fs.e2fs_features_incompat = 0;
sblock.e2fs.e2fs_features_rocompat = 0;
} else {
sblock.e2fs.e2fs_rev = E2FS_REV1;
/*
* e2fsprogs say "REV1" is "dynamic" so
* it isn't quite a version and maybe it means
* "extended from REV0 so check compat features."
*
* XXX: We don't have any native tool to activate
* the EXT2F_COMPAT_RESIZE feature and
* fsck_ext2fs(8) might not fix structures for it.
*/
sblock.e2fs.e2fs_features_compat = EXT2F_COMPAT_RESIZE;
sblock.e2fs.e2fs_features_incompat = EXT2F_INCOMPAT_FTYPE;
sblock.e2fs.e2fs_features_rocompat =
EXT2F_ROCOMPAT_SPARSESUPER | EXT2F_ROCOMPAT_LARGEFILE;
}
sblock.e2fs.e2fs_ruid = geteuid();
sblock.e2fs.e2fs_rgid = getegid();
sblock.e2fs.e2fs_first_ino = EXT2_FIRSTINO;
sblock.e2fs.e2fs_inode_size = inodesize;
/* e2fs_block_group_nr is set on writing superblock to each group */
uuid_create(&uuid, &uustat);
if (uustat != uuid_s_ok)
errx(EXIT_FAILURE, "Failed to generate uuid\n");
uuid_enc_le(sblock.e2fs.e2fs_uuid, &uuid);
if (volname != NULL) {
if (strlen(volname) > sizeof(sblock.e2fs.e2fs_vname))
errx(EXIT_FAILURE, "Volume name is too long");
strlcpy(sblock.e2fs.e2fs_vname, volname,
sizeof(sblock.e2fs.e2fs_vname));
}
sblock.e2fs.e2fs_fsmnt[0] = '\0';
sblock.e2fs_fsmnt[0] = '\0';
sblock.e2fs.e2fs_algo = 0; /* XXX unsupported? */
sblock.e2fs.e2fs_prealloc = 0; /* XXX unsupported? */
sblock.e2fs.e2fs_dir_prealloc = 0; /* XXX unsupported? */
/* calculate blocks for reserved group descriptors for resize */
sblock.e2fs.e2fs_reserved_ngdb = 0;
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) != 0) {
uint64_t target_blocks;
uint target_ncg, target_ngdb, reserved_ngdb;
/* reserve descriptors for size as 1024 times as current */
target_blocks =
(sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock)
* 1024ULL;
/* number of blocks must be in uint32_t */
if (target_blocks > UINT32_MAX)
target_blocks = UINT32_MAX;
target_ncg = howmany(target_blocks, sblock.e2fs.e2fs_bpg);
target_ngdb = howmany(sizeof(struct ext2_gd) * target_ncg,
sblock.e2fs_bsize);
/*
* Reserved group descriptor blocks are preserved as
* the second level double indirect reference blocks in
* the EXT2_RESIZEINO inode, so the maximum number of
* the blocks is NINDIR(fs).
* (see also descriptions in init_resizeino() function)
*
* We check a number including current e2fs_ngdb here
* because they will be moved into reserved gdb on
* possible future size shrink, though e2fsprogs don't
* seem to care about it.
*/
if (target_ngdb > NINDIR(&sblock))
target_ngdb = NINDIR(&sblock);
reserved_ngdb = target_ngdb - sblock.e2fs_ngdb;
/* make sure reserved_ngdb fits in the last cg */
if (reserved_ngdb >= blocks_lastcg - cgoverhead(ncg - 1))
reserved_ngdb = blocks_lastcg - cgoverhead(ncg - 1);
if (reserved_ngdb == 0) {
/* if no space for reserved gdb, disable the feature */
sblock.e2fs.e2fs_features_compat &=
~EXT2F_COMPAT_RESIZE;
}
sblock.e2fs.e2fs_reserved_ngdb = reserved_ngdb;
}
/*
* Initialize group descriptors
*/
gd = malloc(sblock.e2fs_ngdb * bsize);
if (gd == NULL)
errx(EXIT_FAILURE, "Can't allocate descriptors buffer");
memset(gd, 0, sblock.e2fs_ngdb * bsize);
fbcount = 0;
ficount = 0;
for (cylno = 0; cylno < ncg; cylno++) {
uint boffset;
boffset = cgbase(&sblock, cylno);
if (sblock.e2fs.e2fs_rev == E2FS_REV0 ||
(sblock.e2fs.e2fs_features_rocompat &
EXT2F_ROCOMPAT_SPARSESUPER) == 0 ||
cg_has_sb(cylno)) {
boffset += NBLOCK_SUPERBLOCK + sblock.e2fs_ngdb;
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_compat &
EXT2F_COMPAT_RESIZE) != 0)
boffset += sblock.e2fs.e2fs_reserved_ngdb;
}
gd[cylno].ext2bgd_b_bitmap = boffset;
boffset += NBLOCK_BLOCK_BITMAP;
gd[cylno].ext2bgd_i_bitmap = boffset;
boffset += NBLOCK_INODE_BITMAP;
gd[cylno].ext2bgd_i_tables = boffset;
if (cylno == (ncg - 1))
gd[cylno].ext2bgd_nbfree =
blocks_lastcg - cgoverhead(cylno);
else
gd[cylno].ext2bgd_nbfree =
sblock.e2fs.e2fs_bpg - cgoverhead(cylno);
fbcount += gd[cylno].ext2bgd_nbfree;
gd[cylno].ext2bgd_nifree = sblock.e2fs.e2fs_ipg;
if (cylno == 0) {
/* take reserved inodes off nifree */
gd[cylno].ext2bgd_nifree -= EXT2_RESERVED_INODES;
}
ficount += gd[cylno].ext2bgd_nifree;
gd[cylno].ext2bgd_ndirs = 0;
}
sblock.e2fs.e2fs_fbcount = fbcount;
sblock.e2fs.e2fs_ficount = ficount;
/*
* Dump out summary information about file system.
*/
if (verbosity > 0) {
printf("%s: %u.%1uMB (%" PRId64 " sectors) "
"block size %u, fragment size %u\n",
fsys,
(uint)(((uint64_t)bcount * bsize) / (1024 * 1024)),
(uint)((uint64_t)bcount * bsize -
rounddown((uint64_t)bcount * bsize, 1024 * 1024))
/ 1024 / 100,
fssize, bsize, fsize);
printf("\tusing %u block groups of %u.0MB, %u blks, "
"%u inodes.\n",
ncg, bsize * sblock.e2fs.e2fs_bpg / (1024 * 1024),
sblock.e2fs.e2fs_bpg, sblock.e2fs.e2fs_ipg);
}
/*
* allocate space for superblock and group descriptors
*/
iobufsize = (NBLOCK_SUPERBLOCK + sblock.e2fs_ngdb) * sblock.e2fs_bsize;
iobuf = mmap(0, iobufsize, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_PRIVATE, -1, 0);
if (iobuf == NULL)
errx(EXIT_FAILURE, "Cannot allocate I/O buffer\n");
memset(iobuf, 0, iobufsize);
/*
* We now start writing to the filesystem
*/
if (!Nflag) {
static const uint pbsize[] = { 1024, 2048, 4096, 0 };
uint pblock, epblock;
/*
* Validate the given file system size.
* Verify that its last block can actually be accessed.
* Convert to file system fragment sized units.
*/
if (fssize <= 0)
errx(EXIT_FAILURE, "Preposterous size %" PRId64 "\n",
fssize);
wtfs(fssize - 1, sectorsize, iobuf);
/*
* Ensure there is nothing that looks like a filesystem
* superblock anywhere other than where ours will be.
* If fsck_ext2fs finds the wrong one all hell breaks loose!
*
* XXX: needs to check how fsck_ext2fs programs even
* on other OSes determine alternate superblocks
*/
for (i = 0; pbsize[i] != 0; i++) {
epblock = (uint64_t)bcount * bsize / pbsize[i];
for (pblock = ((pbsize[i] == SBSIZE) ? 1 : 0);
pblock < epblock;
pblock += pbsize[i] * NBBY /* bpg */)
zap_old_sblock((daddr_t)pblock *
pbsize[i] / sectorsize);
}
}
if (verbosity >= 3)
printf("super-block backups (for fsck_ext2fs -b #) at:\n");
/* If we are printing more than one line of numbers, line up columns */
fld_width = verbosity < 4 ? 1 : snprintf(NULL, 0, "%" PRIu64,
(uint64_t)cgbase(&sblock, ncg - 1));
/* Get terminal width */
if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) == 0)
max_cols = winsize.ws_col;
else
max_cols = 80;
if (Nflag && verbosity == 3)
/* Leave space to add " ..." after one row of numbers */
max_cols -= 4;
#define BASE 0x10000 /* For some fixed-point maths */
col = 0;
delta = verbosity > 2 ? 0 : max_cols * BASE / ncg;
for (cylno = 0; cylno < ncg; cylno++) {
fflush(stdout);
initcg(cylno);
if (verbosity < 2)
continue;
/* the first one is a master, not backup */
if (cylno == 0)
continue;
/* skip if this cylinder doesn't have a backup */
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
(sblock.e2fs.e2fs_features_rocompat &
EXT2F_ROCOMPAT_SPARSESUPER) != 0 &&
cg_has_sb(cylno) == 0)
continue;
if (delta > 0) {
if (Nflag)
/* No point doing dots for -N */
break;
/* Print dots scaled to end near RH margin */
for (col += delta; col > BASE; col -= BASE)
printf(".");
continue;
}
/* Print superblock numbers */
len = printf(" %*" PRIu64 "," + !col, fld_width,
(uint64_t)cgbase(&sblock, cylno));
col += len;
if (col + len < max_cols)
/* Next number fits */
continue;
/* Next number won't fit, need a newline */
if (verbosity <= 3) {
/* Print dots for subsequent cylinder groups */
delta = sblock.e2fs_ncg - cylno - 1;
if (delta != 0) {
if (Nflag) {
printf(" ...");
break;
}
delta = max_cols * BASE / delta;
}
}
col = 0;
printf("\n");
}
#undef BASE
if (col > 0)
printf("\n");
if (Nflag)
return;
/*
* Now construct the initial file system,
*/
if (fsinit(&tv) == 0)
errx(EXIT_FAILURE, "Error making filesystem");
/*
* Write out the superblock and group descriptors
*/
sblock.e2fs.e2fs_block_group_nr = 0;
sboff = 0;
if (cgbase(&sblock, 0) == 0) {
/*
* If the first block contains the boot block sectors,
* (i.e. in case of sblock.e2fs.e2fs_bsize > BBSIZE)
* we have to preserve data in it.
*/
sboff = SBOFF;
}
e2fs_sbsave(&sblock.e2fs, (struct ext2fs *)(iobuf + sboff));
e2fs_cgsave(gd, (struct ext2_gd *)(iobuf + sblock.e2fs_bsize),
sizeof(struct ext2_gd) * sblock.e2fs_ncg);
wtfs(fsbtodb(&sblock, cgbase(&sblock, 0)) + sboff / sectorsize,
iobufsize - sboff, iobuf + sboff);
munmap(iobuf, iobufsize);
}
/*
* Here we actually start growing the file system. We basically read the
* cylinder summary from the first cylinder group as we want to update
* this on the fly during our various operations. First we handle the
* changes in the former last cylinder group. Afterwards we create all new
* cylinder groups. Now we handle the cylinder group containing the
* cylinder summary which might result in a relocation of the whole
* structure. In the end we write back the updated cylinder summary, the
* new superblock, and slightly patched versions of the super block
* copies.
*/
static void
growfs(int fsi, int fso, unsigned int Nflag)
{
DBG_FUNC("growfs")
time_t modtime;
uint cylno;
int i, j, width;
char tmpbuf[100];
DBG_ENTER;
time(&modtime);
/*
* Get the cylinder summary into the memory.
*/
fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
if (fscs == NULL)
errx(1, "calloc failed");
for (i = 0; i < osblock.fs_cssize; i += osblock.fs_bsize) {
rdfs(fsbtodb(&osblock, osblock.fs_csaddr +
numfrags(&osblock, i)), (size_t)MIN(osblock.fs_cssize - i,
osblock.fs_bsize), (void *)(((char *)fscs) + i), fsi);
}
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
u_int32_t dbg_csc;
char dbg_line[80];
dbg_csp = fscs;
for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. old csum in old location", dbg_csc);
DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++);
}
}
#endif /* FS_DEBUG */
DBG_PRINT0("fscs read\n");
/*
* Do all needed changes in the former last cylinder group.
*/
updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag);
/*
* Dump out summary information about file system.
*/
#ifdef FS_DEBUG
#define B2MBFACTOR (1 / (1024.0 * 1024.0))
printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
(float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
(intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
sblock.fs_fsize);
printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
if (sblock.fs_flags & FS_DOSOFTDEP)
printf("\twith soft updates\n");
#undef B2MBFACTOR
#endif /* FS_DEBUG */
/*
* Now build the cylinders group blocks and
* then print out indices of cylinder groups.
*/
printf("super-block backups (for fsck_ffs -b #) at:\n");
i = 0;
width = charsperline();
/*
* Iterate for only the new cylinder groups.
*/
for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
initcg(cylno, modtime, fso, Nflag);
j = sprintf(tmpbuf, " %jd%s",
(intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
cylno < (sblock.fs_ncg - 1) ? "," : "" );
if (i + j >= width) {
printf("\n");
i = 0;
}
i += j;
printf("%s", tmpbuf);
fflush(stdout);
}
printf("\n");
/*
* Do all needed changes in the first cylinder group.
* allocate blocks in new location
*/
updcsloc(modtime, fsi, fso, Nflag);
/*
* Now write the cylinder summary back to disk.
*/
for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
(size_t)MIN(sblock.fs_cssize - i, sblock.fs_bsize),
(void *)(((char *)fscs) + i), fso, Nflag);
}
DBG_PRINT0("fscs written\n");
#ifdef FS_DEBUG
{
struct csum *dbg_csp;
u_int32_t dbg_csc;
char dbg_line[80];
dbg_csp = fscs;
for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) {
snprintf(dbg_line, sizeof(dbg_line),
"%d. new csum in new location", dbg_csc);
DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++);
}
}
#endif /* FS_DEBUG */
/*
* Now write the new superblock back to disk.
*/
sblock.fs_time = modtime;
wtfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
DBG_PRINT0("sblock written\n");
DBG_DUMP_FS(&sblock, "new initial sblock");
/*
* Clean up the dynamic fields in our superblock copies.
*/
sblock.fs_fmod = 0;
sblock.fs_clean = 1;
sblock.fs_ronly = 0;
sblock.fs_cgrotor = 0;
sblock.fs_state = 0;
memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
sblock.fs_flags &= FS_DOSOFTDEP;
/*
* XXX
* The following fields are currently distributed from the superblock
* to the copies:
* fs_minfree
* fs_rotdelay
* fs_maxcontig
* fs_maxbpg
* fs_minfree,
* fs_optim
* fs_flags regarding SOFTPDATES
*
* We probably should rather change the summary for the cylinder group
* statistics here to the value of what would be in there, if the file
* system were created initially with the new size. Therefor we still
* need to find an easy way of calculating that.
* Possibly we can try to read the first superblock copy and apply the
* "diffed" stats between the old and new superblock by still copying
* certain parameters onto that.
*/
/*
* Write out the duplicate super blocks.
*/
for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
(size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
}
DBG_PRINT0("sblock copies written\n");
DBG_DUMP_FS(&sblock, "new other sblocks");
DBG_LEAVE;
return;
}
/* write the memory-inode out to the inode-block */
void iput(struct inode *ip, int *aibc, s4_daddr *ib)
{
struct s4_dinode *dp;
s4_daddr d;
int i,j,k;
s4_daddr ib2[NIDIR]; /* a double indirect block */
filsys->s_tinode--;
d = itod(ip->i_number);
if(d >= filsys->s_isize) {
if(error == 0)
printf("ilist too small\n");
error = 1;
return;
}
/* get the existing disk inode block to modify */
rdfs(d, buf, s4b_ino );
dp = (struct s4_dinode *)buf;
/* skip to the right entry */
dp += itoo(ip->i_number);
/* convert memory to disk format in buffer */
dp->di_mode = ip->i_ftype | ip->i_mode;
dp->di_nlink = ip->i_nlink;
dp->di_uid = ip->i_uid;
dp->di_gid = ip->i_gid;
dp->di_size = ip->i_size;
dp->di_atime = utime;
dp->di_mtime = utime;
dp->di_ctime = utime;
switch(ip->i_ftype) {
case S_IFDIR:
case S_IFREG:
/* handle direct pointers */
for(i=0; i<*aibc && i<LADDR; i++) {
ip->i_faddr[i] = ib[i];
ib[i] = 0;
}
/* handle single indirect block */
if(i < *aibc)
{
for(j=0; i<*aibc && j<NIDIR; j++, i++)
ib[j] = ib[i];
for(; j<NIDIR; j++)
ib[j] = 0;
ip->i_faddr[LADDR] = alloc();
wtfs(ip->i_faddr[LADDR], (char *)ib, s4b_idx);
}
/* handle double indirect block */
if(i < *aibc)
{
for(k=0; k<NIDIR && i<*aibc; k++)
{
for(j=0; i<*aibc && j<NIDIR; j++, i++)
ib[j] = ib[i];
for(; j<NIDIR; j++)
ib[j] = 0;
ib2[k] = alloc();
wtfs(ib2[k], (char *)ib, s4b_idx);
}
for(; k<NIDIR; k++)
ib2[k] = 0;
ip->i_faddr[LADDR+1] = alloc();
wtfs(ip->i_faddr[LADDR+1], (char *)ib2, s4b_idx );
}
/* triple indirect block? Nope. */
if(i < *aibc)
{
printf("triple indirect blocks not handled\n");
}
break;
default:
printf("bogus ftype %o\n", ip->i_ftype);
exit(1);
}
/* convert the address list to correct disk format */
if( doswap )
s4ltol3r(dp->di_addr, ip->i_faddr, S4_NADDR);
else
s4ltol3(dp->di_addr, ip->i_faddr, S4_NADDR);
wtfs(d, buf, s4b_ino);
}
void
mkfs(char *fsys, int fi, int fo, const char *mfscopy)
{
long i, mincpc, mincpg, inospercg;
long cylno, rpos, blk, j, emitwarn = 0;
long used, mincpgcnt, bpcg;
off_t usedb;
long mapcramped, inodecramped;
long postblsize, rotblsize, totalsbsize;
int status, fd;
time_t utime;
quad_t sizepb;
int width;
char tmpbuf[100]; /* XXX this will break in about 2,500 years */
time(&utime);
#ifdef FSIRAND
if (!randinit) {
randinit = 1;
srandomdev();
}
#endif
if (mfs) {
int omask;
pid_t child;
mfs_ppid = getpid();
signal(SIGUSR1, parentready);
if ((child = fork()) != 0) {
/*
* Parent
*/
if (child == -1)
err(10, "mfs");
if (mfscopy)
copyroot = FSCopy(©hlinks, mfscopy);
signal(SIGUSR1, started);
kill(child, SIGUSR1);
while (waitpid(child, &status, 0) != child)
;
exit(WEXITSTATUS(status));
/* NOTREACHED */
}
/*
* Child
*/
omask = sigblock(sigmask(SIGUSR1));
while (parentready_signalled == 0)
sigpause(omask);
sigsetmask(omask);
if (filename != NULL) {
unsigned char buf[BUFSIZ];
unsigned long l, l1;
ssize_t w;
fd = open(filename, O_RDWR|O_TRUNC|O_CREAT, 0644);
if(fd < 0)
err(12, "%s", filename);
l1 = fssize * sectorsize;
if (l1 > BUFSIZ)
l1 = BUFSIZ;
for (l = 0; l < fssize * (u_long)sectorsize; l += l1) {
w = write(fd, buf, l1);
if (w < 0 || (u_long)w != l1)
err(12, "%s", filename);
}
membase = mmap(NULL, fssize * sectorsize,
PROT_READ|PROT_WRITE,
MAP_SHARED, fd, 0);
if (membase == MAP_FAILED)
err(12, "mmap");
close(fd);
} else {
membase = mmap(NULL, fssize * sectorsize,
PROT_READ|PROT_WRITE,
MAP_SHARED|MAP_ANON, -1, 0);
if (membase == MAP_FAILED)
errx(13, "mmap (anonymous memory) failed");
}
}
fsi = fi;
fso = fo;
if (Oflag) {
sblock.fs_inodefmt = FS_42INODEFMT;
sblock.fs_maxsymlinklen = 0;
} else {
sblock.fs_inodefmt = FS_44INODEFMT;
sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
}
if (Uflag)
sblock.fs_flags |= FS_DOSOFTDEP;
if (Lflag)
strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN);
/*
* Validate the given file system size.
* Verify that its last block can actually be accessed.
*/
if (fssize == 0)
printf("preposterous size %lu\n", fssize), exit(13);
wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize,
(char *)&sblock);
/*
* collect and verify the sector and track info
*/
sblock.fs_nsect = nsectors;
sblock.fs_ntrak = ntracks;
if (sblock.fs_ntrak <= 0)
printf("preposterous ntrak %d\n", sblock.fs_ntrak), exit(14);
if (sblock.fs_nsect <= 0)
printf("preposterous nsect %d\n", sblock.fs_nsect), exit(15);
/*
* collect and verify the filesystem density info
*/
sblock.fs_avgfilesize = avgfilesize;
sblock.fs_avgfpdir = avgfilesperdir;
if (sblock.fs_avgfilesize <= 0)
printf("illegal expected average file size %d\n",
sblock.fs_avgfilesize), exit(14);
if (sblock.fs_avgfpdir <= 0)
printf("illegal expected number of files per directory %d\n",
sblock.fs_avgfpdir), exit(15);
/*
* collect and verify the block and fragment sizes
*/
sblock.fs_bsize = bsize;
sblock.fs_fsize = fsize;
if (!POWEROF2(sblock.fs_bsize)) {
printf("block size must be a power of 2, not %d\n",
sblock.fs_bsize);
exit(16);
}
if (!POWEROF2(sblock.fs_fsize)) {
printf("fragment size must be a power of 2, not %d\n",
sblock.fs_fsize);
exit(17);
}
if (sblock.fs_fsize < sectorsize) {
printf("fragment size %d is too small, minimum is %d\n",
sblock.fs_fsize, sectorsize);
exit(18);
}
if (sblock.fs_bsize < MINBSIZE) {
printf("block size %d is too small, minimum is %d\n",
sblock.fs_bsize, MINBSIZE);
exit(19);
}
if (sblock.fs_bsize < sblock.fs_fsize) {
printf("block size (%d) cannot be smaller than fragment size (%d)\n",
sblock.fs_bsize, sblock.fs_fsize);
exit(20);
}
sblock.fs_bmask = ~(sblock.fs_bsize - 1);
sblock.fs_fmask = ~(sblock.fs_fsize - 1);
sblock.fs_qbmask = ~sblock.fs_bmask;
sblock.fs_qfmask = ~sblock.fs_fmask;
for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1)
sblock.fs_bshift++;
for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1)
sblock.fs_fshift++;
sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize);
for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1)
sblock.fs_fragshift++;
if (sblock.fs_frag > MAXFRAG) {
printf("fragment size %d is too small, minimum with block size %d is %d\n",
sblock.fs_fsize, sblock.fs_bsize,
sblock.fs_bsize / MAXFRAG);
exit(21);
}
sblock.fs_nrpos = nrpos;
sblock.fs_nindir = sblock.fs_bsize / sizeof(daddr_t);
sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
sblock.fs_nspf = sblock.fs_fsize / sectorsize;
for (sblock.fs_fsbtodb = 0, i = NSPF(&sblock); i > 1; i >>= 1)
sblock.fs_fsbtodb++;
sblock.fs_sblkno =
roundup(howmany(bbsize + sbsize, sblock.fs_fsize), sblock.fs_frag);
sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno +
roundup(howmany(sbsize, sblock.fs_fsize), sblock.fs_frag));
sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
sblock.fs_cgoffset = roundup(
howmany(sblock.fs_nsect, NSPF(&sblock)), sblock.fs_frag);
for (sblock.fs_cgmask = 0xffffffff, i = sblock.fs_ntrak; i > 1; i >>= 1)
sblock.fs_cgmask <<= 1;
if (!POWEROF2(sblock.fs_ntrak))
sblock.fs_cgmask <<= 1;
sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) {
sizepb *= NINDIR(&sblock);
sblock.fs_maxfilesize += sizepb;
}
/*
* Validate specified/determined secpercyl
* and calculate minimum cylinders per group.
*/
sblock.fs_spc = secpercyl;
for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc;
sblock.fs_cpc > 1 && (i & 1) == 0;
sblock.fs_cpc >>= 1, i >>= 1)
/* void */;
mincpc = sblock.fs_cpc;
bpcg = sblock.fs_spc * sectorsize;
inospercg = roundup(bpcg / sizeof(struct ufs1_dinode), INOPB(&sblock));
if (inospercg > MAXIPG(&sblock))
inospercg = MAXIPG(&sblock);
used = (sblock.fs_iblkno + inospercg / INOPF(&sblock)) * NSPF(&sblock);
mincpgcnt = howmany(sblock.fs_cgoffset * (~sblock.fs_cgmask) + used,
sblock.fs_spc);
mincpg = roundup(mincpgcnt, mincpc);
/*
* Ensure that cylinder group with mincpg has enough space
* for block maps.
*/
sblock.fs_cpg = mincpg;
sblock.fs_ipg = inospercg;
if (maxcontig > 1)
sblock.fs_contigsumsize = MIN(maxcontig, FS_MAXCONTIG);
mapcramped = 0;
while (CGSIZE(&sblock) > (uint32_t)sblock.fs_bsize) {
mapcramped = 1;
if (sblock.fs_bsize < MAXBSIZE) {
sblock.fs_bsize <<= 1;
if ((i & 1) == 0) {
i >>= 1;
} else {
int main(int argc, char **argv)
{
int f, c;
long n, nb;
time(&utime);
pname = argv[0];
endian = S4_ENDIAN;
if( argc > 1 && argv[1][0] == '-' )
{
if( !strcmp("-be", argv[1]) )
{
doswap = S4_ENDIAN == S4_BE ? 0 : 1;
endian = S4_BE;
}
else if( !strcmp("-le", argv[1]) )
{
doswap = S4_ENDIAN == S4_BE ? 1 : 0;
endian = S4_LE;
}
argv++;
argc--;
}
/*
* open relevent files
*/
if(argc < 3) {
printf("usage: %s filsys blocks[:inodes] [gap blocks/cyl]\n",
pname );
exit(1);
}
fsys = argv[1];
sizing = argv[2];
/* Create new file, clobbering old one. */
fsfd = open(fsys, O_RDWR|O_CREAT|O_TRUNC, 0640 );
if(fsfd < 0) {
printf("%s: cannot create\n", fsys);
exit(1);
}
nb = n = 0;
/* if there's an argument, and we can crack it into
size:inodes, or size, take them, else complain.
If nothing, take defaults */
for(f=0; (c=sizing[f]); f++) {
if(c<'0' || c>'9') {
if(c == ':') {
nb = n;
n = 0;
continue;
}
printf("Mkfs: expected numbers, not '%s'\n", sizing);
exit(1);
}
n = n*10 + (c-'0');
}
if(!nb) {
nb = n / SECTPB;
n = nb/4;
} else {
nb /= SECTPB;
}
/* nb is number of logical blocks in fs,
n is number of inodes */
filsys->s_fsize = nb - 2;
n /= NBINODE; /* number of logical blocs for inodes */
if(n <= 0)
n = 1;
/* cap inodes */
if(n > 65500/NBINODE)
{
printf("Too many inode blocks, %ld max\n", 65500/NBINODE );
n = 65500/NBINODE;
}
filsys->s_isize = n + 2;
/* set magic number for file system type */
filsys->s_magic = S4_FsMAGIC;
filsys->s_type = (FSBSIZE == 512) ? S4_Fs1b : S4_Fs2b;
/* cylinder */
if(argc >= 5) {
f_m = atoi(argv[3]);
f_n = atoi(argv[4]);
if(f_n <= 0 || f_n >= MAXFN)
f_n = CYLSIZE;
if(f_m <= 0 || f_m > f_n)
f_m = STEPSIZE;
}
f_n /= SECTPB;
if( f_n > (filsys->s_fsize / 4) )
f_n = filsys->s_fsize / 4;
f_m = (f_m +(SECTPB -1))/SECTPB; /* gap rounded up to the next block */
/* don't set these until adjustments are made above. */
filsys->s_vinfo[0] = f_m;
filsys->s_vinfo[1] = f_n;
printf("Built %s-endian file system\n", S4_BE == endian ? "big" : "little");
printf("bytes per logical block = %d\n", FSBSIZE);
printf("total logical blocks = %ld\n", (long)filsys->s_fsize);
printf("total inodes = %ld\n", n*NBINODE);
printf("freelist gap = %d\n", filsys->s_vinfo[0]);
printf("freelist cylinder size = %d \n", filsys->s_vinfo[1]);
if(filsys->s_isize >= filsys->s_fsize) {
printf("%ld/%ld: bad file blocks/inode blks ratio\n",
(long)filsys->s_fsize, (long)filsys->s_isize-2);
exit(1);
}
/* ---------------------------- */
/* geometry set up, now prepare */
ino = 0;
filsys->s_tinode = 0;
filsys->s_tfree = filsys->s_fsize;
/* write zeros to the whole inode table */
memset( buf, 0, FSBSIZE );
for(n=2; n!=filsys->s_isize; n++) {
wtfs(n, buf, s4b_ino );
filsys->s_tinode += NBINODE;
}
/* touch end block to set length and ensure writable. */
wtfs( nb - 1, buf, s4b_raw );
/* populate the freelist */
bflist();
/* create the root directory with no parent inode */
mkfile((struct inode *)0);
/* stamp the superblock */
filsys->s_time = utime;
/* write super-block onto file system */
if( doswap )
s4_fsu_swap( (s4_fsu*)filsys, s4b_super );
lseek(fsfd, (long)S4_SUPERBOFF, 0);
if(write(fsfd, (char *)filsys, SBSIZE) != SBSIZE) {
printf("write error: super-block\n");
exit(1);
}
if( doswap )
s4_fsu_swap( (s4_fsu*)filsys, s4b_super );
if( error )
{
printf("mkfs: ERROR making filesystem!!!\n");
}
else
{
printf("mkfs: Available blocks = %ld %.fk %.2fM\n",
(long)filsys->s_tfree,
(double)filsys->s_tfree * FSBSIZE / 1024,
(double)filsys->s_tfree * FSBSIZE / 1024 / 1024 );
}
exit(error);
}
