Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sbin/newfs_lfs/make_lfs.c

1008 lines
31 KiB
C
Raw Permalink Blame History

/* $NetBSD: make_lfs.c,v 1.59 2015/10/15 06:24:33 dholland Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Konrad E. Schroder <perseant@hhhh.org>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)lfs.c 8.5 (Berkeley) 5/24/95";
#else
__RCSID("$NetBSD: make_lfs.c,v 1.59 2015/10/15 06:24:33 dholland Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/disk.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <sys/stat.h>
/* Override certain things to make <ufs/lfs/lfs.h> work */
# undef simple_lock
# define simple_lock(x)
# undef simple_unlock
# define simple_unlock(x)
# define vnode uvnode
# define buf ubuf
# define panic call_panic
#include <ufs/lfs/lfs.h>
#include <ufs/lfs/lfs_accessors.h>
#include <ufs/lfs/lfs_inode.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "config.h"
#include "extern.h"
#include "bufcache.h"
#include "vnode.h"
#include "lfs_user.h"
#include "segwrite.h"
extern int Nflag; /* Don't write anything */
static blkcnt_t ifibc; /* How many indirect blocks */
#ifdef MAKE_LF_DIR
# define HIGHEST_USED_INO LOSTFOUNDINO
#else
# define HIGHEST_USED_INO ULFS_ROOTINO
#endif
static const struct dlfs dlfs32_default = {
.dlfs_magic = LFS_MAGIC,
.dlfs_version = LFS_VERSION,
.dlfs_size = 0,
.dlfs_ssize = DFL_LFSSEG,
.dlfs_dsize = 0,
.dlfs_bsize = DFL_LFSBLOCK,
.dlfs_fsize = DFL_LFSFRAG,
.dlfs_frag = DFL_LFSBLOCK/DFL_LFSFRAG,
.dlfs_freehd = HIGHEST_USED_INO + 1,
.dlfs_bfree = 0,
.dlfs_nfiles = 0,
.dlfs_avail = 0,
.dlfs_uinodes = 0,
.dlfs_idaddr = 0,
.dlfs_ifile = LFS_IFILE_INUM,
.dlfs_lastseg = 0,
.dlfs_nextseg = 0,
.dlfs_curseg = 0,
.dlfs_offset = 0,
.dlfs_lastpseg = 0,
.dlfs_inopf = 0,
.dlfs_minfree = MINFREE,
.dlfs_maxfilesize = 0,
.dlfs_fsbpseg = 0,
.dlfs_inopb = DFL_LFSBLOCK/sizeof(struct lfs32_dinode),
.dlfs_ifpb = DFL_LFSBLOCK/sizeof(IFILE32),
.dlfs_sepb = DFL_LFSBLOCK/sizeof(SEGUSE),
.dlfs_nindir = DFL_LFSBLOCK/sizeof(int32_t),
.dlfs_nseg = 0,
.dlfs_nspf = 0,
.dlfs_cleansz = 0,
.dlfs_segtabsz = 0,
.dlfs_segmask = DFL_LFSSEG_MASK,
.dlfs_segshift = DFL_LFSSEG_SHIFT,
.dlfs_bshift = DFL_LFSBLOCK_SHIFT,
.dlfs_ffshift = DFL_LFS_FFSHIFT,
.dlfs_fbshift = DFL_LFS_FBSHIFT,
.dlfs_bmask = DFL_LFSBLOCK_MASK,
.dlfs_ffmask = DFL_LFS_FFMASK,
.dlfs_fbmask = DFL_LFS_FBMASK,
.dlfs_blktodb = 0,
.dlfs_sushift = 0,
.dlfs_maxsymlinklen = LFS32_MAXSYMLINKLEN,
.dlfs_sboffs = { 0 },
.dlfs_nclean = 0,
.dlfs_fsmnt = { 0 },
.dlfs_pflags = LFS_PF_CLEAN,
.dlfs_dmeta = 0,
.dlfs_minfreeseg = 0,
.dlfs_sumsize = 0,
.dlfs_serial = 0,
.dlfs_ibsize = DFL_LFSFRAG,
.dlfs_s0addr = 0,
.dlfs_tstamp = 0,
.dlfs_inodefmt = LFS_44INODEFMT,
.dlfs_interleave = 0,
.dlfs_ident = 0,
.dlfs_fsbtodb = 0,
.dlfs_resvseg = 0,
.dlfs_pad = { 0 },
.dlfs_cksum = 0
};
static const struct dlfs64 dlfs64_default = {
.dlfs_magic = LFS64_MAGIC,
.dlfs_version = LFS_VERSION,
.dlfs_size = 0,
.dlfs_dsize = 0,
.dlfs_ssize = DFL_LFSSEG,
.dlfs_bsize = DFL_LFSBLOCK,
.dlfs_fsize = DFL_LFSFRAG,
.dlfs_frag = DFL_LFSBLOCK/DFL_LFSFRAG,
.dlfs_freehd = HIGHEST_USED_INO + 1,
.dlfs_nfiles = 0,
.dlfs_bfree = 0,
.dlfs_avail = 0,
.dlfs_idaddr = 0,
.dlfs_uinodes = 0,
.dlfs_unused_0 = 0,
.dlfs_lastseg = 0,
.dlfs_nextseg = 0,
.dlfs_curseg = 0,
.dlfs_offset = 0,
.dlfs_lastpseg = 0,
.dlfs_inopf = 0,
.dlfs_minfree = MINFREE,
.dlfs_maxfilesize = 0,
.dlfs_fsbpseg = 0,
.dlfs_inopb = DFL_LFSBLOCK/sizeof(struct lfs64_dinode),
.dlfs_ifpb = DFL_LFSBLOCK/sizeof(IFILE64),
.dlfs_sepb = DFL_LFSBLOCK/sizeof(SEGUSE),
.dlfs_nindir = DFL_LFSBLOCK/sizeof(int64_t),
.dlfs_nseg = 0,
.dlfs_nspf = 0,
.dlfs_cleansz = 0,
.dlfs_segtabsz = 0,
.dlfs_bshift = DFL_LFSBLOCK_SHIFT,
.dlfs_ffshift = DFL_LFS_FFSHIFT,
.dlfs_fbshift = DFL_LFS_FBSHIFT,
.dlfs_bmask = DFL_LFSBLOCK_MASK,
.dlfs_ffmask = DFL_LFS_FFMASK,
.dlfs_fbmask = DFL_LFS_FBMASK,
.dlfs_blktodb = 0,
.dlfs_sushift = 0,
.dlfs_sboffs = { 0 },
.dlfs_maxsymlinklen = LFS64_MAXSYMLINKLEN,
.dlfs_nclean = 0,
.dlfs_fsmnt = { 0 },
.dlfs_pflags = LFS_PF_CLEAN,
.dlfs_dmeta = 0,
.dlfs_minfreeseg = 0,
.dlfs_sumsize = 0,
.dlfs_ibsize = DFL_LFSFRAG,
.dlfs_inodefmt = LFS_44INODEFMT,
.dlfs_serial = 0,
.dlfs_s0addr = 0,
.dlfs_tstamp = 0,
.dlfs_interleave = 0,
.dlfs_ident = 0,
.dlfs_fsbtodb = 0,
.dlfs_resvseg = 0,
.dlfs_pad = { 0 },
.dlfs_cksum = 0
};
static const struct lfs lfs_default;
#define UMASK 0755
struct dirproto {
ino_t dp_ino;
const char *dp_name;
unsigned dp_type;
};
static const struct dirproto lfs_root_dir[] = {
{ ULFS_ROOTINO, ".", LFS_DT_DIR },
{ ULFS_ROOTINO, "..", LFS_DT_DIR },
/*{ LFS_IFILE_INUM, "ifile", LFS_DT_REG },*/
#ifdef MAKE_LF_DIR
{ LOSTFOUNDINO, "lost+found", LFS_DT_DIR },
#endif
};
#ifdef MAKE_LF_DIR
static const struct dirproto lfs_lf_dir[] = {
{ LOSTFOUNDINO, ".", LFS_DT_DIR },
{ ULFS_ROOTINO, "..", LFS_DT_DIR },
};
#endif
void pwarn(const char *, ...);
static void make_dinode(ino_t, union lfs_dinode *, int, struct lfs *);
static void make_dir(struct lfs *, void *,
const struct dirproto *, unsigned);
/*
* calculate the maximum file size allowed with the specified block shift.
*/
static uint64_t
maxfilesize(struct lfs *fs, int bshift)
{
uint64_t nptr; /* number of block pointers per block */
uint64_t maxblock;
nptr = (1 << bshift) / LFS_BLKPTRSIZE(fs);
maxblock = ULFS_NDADDR + nptr + nptr * nptr + nptr * nptr * nptr;
return maxblock << bshift;
}
/*
* Create the root directory for this file system and the lost+found
* directory.
*/
static void
make_dinode(ino_t ino, union lfs_dinode *dip, int nfrags, struct lfs *fs)
{
int i;
int nblocks, bb, base, factor, lvl;
time_t t;
nblocks = howmany(nfrags, lfs_sb_getfrag(fs));
if (nblocks >= ULFS_NDADDR)
nfrags = roundup(nfrags, lfs_sb_getfrag(fs));
lfs_dino_setnlink(fs, dip, 1);
lfs_dino_setblocks(fs, dip, nfrags);
lfs_dino_setsize(fs, dip, nfrags << lfs_sb_getffshift(fs));
t = lfs_sb_gettstamp(fs);
lfs_dino_setatime(fs, dip, t);
lfs_dino_setmtime(fs, dip, t);
lfs_dino_setctime(fs, dip, t);
lfs_dino_setatimensec(fs, dip, 0);
lfs_dino_setmtimensec(fs, dip, 0);
lfs_dino_setctimensec(fs, dip, 0);
lfs_dino_setinumber(fs, dip, ino);
lfs_dino_setgen(fs, dip, 1);
if (ULFS_NDADDR < nblocks) {
/* Count up how many indirect blocks we need, recursively */
/* XXX We are only called with nblocks > 1 for Ifile */
bb = nblocks - ULFS_NDADDR;
while (bb > 0) {
bb = howmany(bb, LFS_NINDIR(fs));
ifibc += bb;
--bb;
}
lfs_dino_setblocks(fs, dip,
lfs_dino_getblocks(fs, dip) + lfs_blkstofrags(fs, ifibc));
}
/* Assign the block addresses for the ifile */
for (i = 0; i < MIN(nblocks,ULFS_NDADDR); i++) {
lfs_dino_setdb(fs, dip, i, 0x0);
}
if (nblocks > ULFS_NDADDR) {
lfs_dino_setib(fs, dip, 0, 0x0);
bb = howmany(nblocks - ULFS_NDADDR, LFS_NINDIR(fs)) - 1;
factor = LFS_NINDIR(fs);
base = -ULFS_NDADDR - factor;
lvl = 1;
while (bb > 0) {
lfs_dino_setib(fs, dip, lvl, 0x0);
bb = howmany(bb, LFS_NINDIR(fs));
--bb;
factor *= LFS_NINDIR(fs);
base -= factor;
++lvl;
}
}
}
/*
* Construct a set of directory entries in "bufp". We assume that all the
* entries in protodir fit in the first DIRBLKSIZ.
*/
static void
make_dir(struct lfs *fs, void *bufp,
const struct dirproto *protodir, unsigned numentries)
{
LFS_DIRHEADER *ep;
unsigned spaceleft;
unsigned namlen, reclen;
unsigned i;
spaceleft = LFS_DIRBLKSIZ;
ep = bufp;
for (i = 0; i < numentries; i++) {
namlen = strlen(protodir[i].dp_name);
reclen = LFS_DIRECTSIZ(fs, namlen);
if (spaceleft < reclen)
fatal("%s: %s", special, "directory too big");
/* Last entry includes all the free space. */
if (i + 1 == numentries) {
reclen = spaceleft;
}
spaceleft -= reclen;
lfs_dir_setino(fs, ep, protodir[i].dp_ino);
lfs_dir_setreclen(fs, ep, reclen);
lfs_dir_settype(fs, ep, protodir[i].dp_type);
lfs_dir_setnamlen(fs, ep, namlen);
lfs_copydirname(fs, lfs_dir_nameptr(fs, ep), protodir[i].dp_name,
namlen, reclen);
ep = LFS_NEXTDIR(fs, ep);
}
assert(spaceleft == 0);
}
int
make_lfs(int devfd, uint secsize, struct dkwedge_info *dkw, int minfree,
int block_size, int frag_size, int seg_size, int minfreeseg,
int resvseg, int version, daddr_t start, int ibsize, int interleave,
u_int32_t roll_id, int bitwidth)
{
union lfs_dinode *dip; /* Pointer to a disk inode */
CLEANERINFO *cip; /* Segment cleaner information table */
IFILE *ipall; /* Pointer to array of ifile structures */
IFILE64 *ip64 = NULL;
IFILE32 *ip32 = NULL;
IFILE_V1 *ip_v1 = NULL;
struct lfs *fs; /* Superblock */
SEGUSE *segp; /* Segment usage table */
daddr_t sb_addr; /* Address of superblocks */
daddr_t seg_addr; /* Address of current segment */
int bsize; /* Block size */
int fsize; /* Fragment size */
int db_per_blk; /* Disk blocks per file block */
int i, j;
int sb_interval; /* number of segs between super blocks */
int ssize; /* Segment size */
double fssize;
int warned_segtoobig=0;
int label_fsb, sb_fsb;
int curw, ww;
char tbuf[BUFSIZ];
struct ubuf *bp;
struct uvnode *vp, *save_devvp;
daddr_t bb, ubb;
int dmeta, labelskew;
u_int64_t tsepb, tnseg;
time_t stamp;
bool is64;
bool dobyteswap = false; /* XXX notyet */
is64 = (bitwidth == 64);
/*
* Initialize buffer cache. Use a ballpark guess of the length of
* the segment table for the number of hash chains.
*/
tnseg = dkw->dkw_size / ((seg_size ? seg_size : DFL_LFSSEG) / secsize);
tsepb = (block_size ? block_size : DFL_LFSBLOCK) / sizeof(SEGSUM32);
if (tnseg == 0)
fatal("zero size partition");
bufinit(tnseg / tsepb);
/* Initialize LFS subsystem with blank superblock and ifile. */
fs = lfs_init(devfd, start, 0, 1, 1/* XXX debug*/);
save_devvp = fs->lfs_devvp;
vp = fs->lfs_ivnode;
/* XXX this seems like a rubbish */
*fs = lfs_default;
if (is64) {
fs->lfs_dlfs_u.u_64 = dlfs64_default;
} else {
fs->lfs_dlfs_u.u_32 = dlfs32_default;
}
fs->lfs_is64 = is64;
fs->lfs_dobyteswap = dobyteswap;
fs->lfs_hasolddirfmt = false;
fs->lfs_ivnode = vp;
fs->lfs_devvp = save_devvp;
/* Set version first of all since it is used to compute other fields */
lfs_sb_setversion(fs, version);
/* If partition is not an LFS partition, warn that that is the case */
if (strcmp(dkw->dkw_ptype, DKW_PTYPE_LFS) != 0) {
fatal("partition label indicated fs type \"%s\", "
"expected \"%s\"", dkw->dkw_ptype, DKW_PTYPE_LFS);
}
if (!(bsize = block_size)) {
bsize = DFL_LFSBLOCK;
if (dkw->dkw_size <= SMALL_FSSIZE)
bsize = SMALL_LFSBLOCK;
}
if (!(fsize = frag_size)) {
fsize = DFL_LFSFRAG;
if (dkw->dkw_size <= SMALL_FSSIZE)
fsize = SMALL_LFSFRAG;
}
if (!(ssize = seg_size)) {
ssize = DFL_LFSSEG;
if (dkw->dkw_size <= SMALL_FSSIZE)
ssize = SMALL_LFSSEG;
}
if (version > 1) {
if (ibsize == 0)
ibsize = fsize;
if (ibsize <= 0 || ibsize % fsize)
fatal("illegal inode block size: %d\n", ibsize);
} else if (ibsize && ibsize != bsize)
fatal("cannot specify inode block size when version == 1\n");
/* Sanity check: fsize<=bsize<ssize */
if (fsize > bsize) {
/* Only complain if fsize was explicitly set */
if(frag_size)
fatal("fragment size must be <= block size %d", bsize);
fsize = bsize;
}
if (bsize >= ssize) {
/* Only fatal if ssize was explicitly set */
if(seg_size)
fatal("block size must be < segment size");
warnx("%s: disklabel segment size (%d) too small, using default (%d)",
progname, ssize, DFL_LFSSEG);
ssize = DFL_LFSSEG;
}
if (start < 0 || start >= dkw->dkw_size)
fatal("filesystem offset %ld out of range", (long)start);
if (version == 1) {
if (start)
warnx("filesystem offset ignored for version 1 filesystem");
start = LFS_LABELPAD / secsize;
}
tryagain:
/* Modify parts of superblock overridden by command line arguments */
if (bsize != DFL_LFSBLOCK || fsize != DFL_LFSFRAG) {
lfs_sb_setbshift(fs, lfs_log2(bsize));
if (1 << lfs_sb_getbshift(fs) != bsize)
fatal("%d: block size not a power of 2", bsize);
lfs_sb_setbsize(fs, bsize);
lfs_sb_setfsize(fs, fsize);
lfs_sb_setbmask(fs, bsize - 1);
lfs_sb_setffmask(fs, fsize - 1);
lfs_sb_setffshift(fs, lfs_log2(fsize));
if (1 << lfs_sb_getffshift(fs) != fsize)
fatal("%d: frag size not a power of 2", fsize);
lfs_sb_setfrag(fs, lfs_numfrags(fs, bsize));
lfs_sb_setfbmask(fs, lfs_sb_getfrag(fs) - 1);
lfs_sb_setfbshift(fs, lfs_log2(lfs_sb_getfrag(fs)));
lfs_sb_setifpb(fs, bsize / IFILE_ENTRYSIZE(fs));
lfs_sb_setnindir(fs, bsize / LFS_BLKPTRSIZE(fs));
}
if (lfs_sb_getversion(fs) == 1) {
lfs_sb_setsumsize(fs, LFS_V1_SUMMARY_SIZE);
if (!is64) {
unsigned segshift;
segshift = lfs_log2(ssize);
if (1 << segshift != ssize)
fatal("%d: segment size not power of 2",
ssize);
fs->lfs_dlfs_u.u_32.dlfs_segshift = segshift;
fs->lfs_dlfs_u.u_32.dlfs_segmask = ssize - 1;
}
lfs_sb_setifpb(fs, lfs_sb_getbsize(fs) / sizeof(IFILE_V1));
lfs_sb_setibsize(fs, lfs_sb_getbsize(fs));
lfs_sb_setsepb(fs, bsize / sizeof(SEGUSE_V1));
lfs_sb_setssize(fs, ssize >> lfs_sb_getbshift(fs));
} else {
if (ssize % fsize) {
fprintf(stderr,
"Segment size %d is not a multiple of frag size; ",
ssize);
ssize = roundup(ssize, fsize);
fprintf(stderr, "trying size %d.\n", ssize);
goto tryagain;
}
lfs_sb_setsumsize(fs, fsize);
if (!is64) {
/* these do not exist in the 64-bit superblock */
fs->lfs_dlfs_u.u_32.dlfs_segshift = 0;
fs->lfs_dlfs_u.u_32.dlfs_segmask = 0;
}
lfs_sb_setsepb(fs, bsize / sizeof(SEGUSE));
lfs_sb_setssize(fs, ssize);
lfs_sb_setibsize(fs, ibsize);
}
lfs_sb_setinopb(fs, lfs_sb_getibsize(fs) / DINOSIZE(fs));
lfs_sb_setminfree(fs, minfree);
if (version > 1) {
lfs_sb_setinopf(fs, secsize/DINOSIZE(fs));
lfs_sb_setinterleave(fs, interleave);
if (roll_id == 0)
roll_id = arc4random();
lfs_sb_setident(fs, roll_id);
}
/*
* Fill in parts of superblock that can be computed from file system
* size, disk geometry and current time.
*
* XXX: this seems to set dlfs_size wrong for version 1... as in,
* sets it and then overwrites it a few lines later.
*/
db_per_blk = bsize/secsize;
lfs_sb_setblktodb(fs, lfs_log2(db_per_blk));
lfs_sb_setfsbtodb(fs, lfs_log2(fsize / secsize));
if (version == 1) {
lfs_sb_setsushift(fs, lfs_log2(lfs_sb_getsepb(fs)));
lfs_sb_setfsbtodb(fs, 0);
lfs_sb_setsize(fs, dkw->dkw_size >> lfs_sb_getblktodb(fs));
}
label_fsb = lfs_btofsb(fs, roundup(LFS_LABELPAD, fsize));
sb_fsb = lfs_btofsb(fs, roundup(LFS_SBPAD, fsize));
lfs_sb_setfsbpseg(fs, LFS_DBTOFSB(fs, ssize / secsize));
lfs_sb_setsize(fs, dkw->dkw_size >> lfs_sb_getfsbtodb(fs));
lfs_sb_setdsize(fs, LFS_DBTOFSB(fs, dkw->dkw_size) -
MAX(label_fsb, LFS_DBTOFSB(fs, start)));
lfs_sb_setnseg(fs, lfs_sb_getdsize(fs) / lfs_segtod(fs, 1));
lfs_sb_setnclean(fs, lfs_sb_getnseg(fs) - 1);
lfs_sb_setmaxfilesize(fs, maxfilesize(fs, lfs_sb_getbshift(fs)));
if (minfreeseg == 0)
lfs_sb_setminfreeseg(fs, lfs_sb_getnseg(fs) / DFL_MIN_FREE_SEGS);
else
lfs_sb_setminfreeseg(fs, minfreeseg);
if (lfs_sb_getminfreeseg(fs) < MIN_FREE_SEGS)
lfs_sb_setminfreeseg(fs, MIN_FREE_SEGS);
if (resvseg == 0)
lfs_sb_setresvseg(fs, lfs_sb_getminfreeseg(fs) / 2 + 1);
else
lfs_sb_setresvseg(fs, resvseg);
if (lfs_sb_getresvseg(fs) < MIN_RESV_SEGS)
lfs_sb_setresvseg(fs, MIN_RESV_SEGS);
if(lfs_sb_getnseg(fs) < (4 * lfs_sb_getminfreeseg(fs))
|| lfs_sb_getnseg(fs) < LFS_MIN_SBINTERVAL + 1)
{
if(seg_size == 0 && ssize > (bsize<<1)) {
if(!warned_segtoobig) {
fprintf(stderr,"Segment size %d is too large; "
"trying smaller sizes.\n", ssize);
if (ssize == (bsize << 16)) {
fprintf(stderr, "(Did you perhaps "
"accidentally leave \"16\" "
"in the disklabel's sgs "
"field?)\n");
}
}
++warned_segtoobig;
ssize >>= 1;
goto tryagain;
}
fatal("Could not allocate enough segments with segment "
"size %d and block size %d;\nplease decrease the "
"segment size.\n", ssize, lfs_sb_getbsize(fs));
}
if(warned_segtoobig)
fprintf(stderr,"Using segment size %d, block size %d, frag size %d.\n", ssize, bsize, fsize);
/*
* Now that we've determined what we're going to do, announce it
* to the user.
*/
printf("Creating a version %d LFS%d", lfs_sb_getversion(fs), bitwidth);
if (lfs_sb_getversion(fs) > 1)
printf(" with roll-forward ident 0x%x", lfs_sb_getident(fs));
printf("\n");
if (bitwidth == 64) {
printf("WARNING: The LFS64 on-disk format is not final.\n");
printf("WARNING: 64-bit volumes should be used only for "
"testing.\n");
}
fssize = (double)lfs_sb_getnseg(fs);
fssize *= (double)ssize;
fssize /= 1048576.0;
printf("%.1fMB in %d segments of size %d\n", fssize,
lfs_sb_getnseg(fs), ssize);
/*
* The number of free blocks is set from the number of segments
* times the segment size - lfs_minfreesegs (that we never write
* because we need to make sure the cleaner can run). Then
* we'll subtract off the room for the superblocks ifile entries
* and segment usage table, and half a block per segment that can't
* be written due to fragmentation.
*/
lfs_sb_setdsize(fs,
lfs_segtod(fs, lfs_sb_getnseg(fs) - lfs_sb_getminfreeseg(fs)));
lfs_sb_setbfree(fs, lfs_sb_getdsize(fs));
lfs_sb_subbfree(fs, LFS_DBTOFSB(fs, ((lfs_sb_getnseg(fs) / 2) <<
lfs_sb_getblktodb(fs))));
lfs_sb_setsegtabsz(fs, SEGTABSIZE_SU(fs));
lfs_sb_setcleansz(fs, CLEANSIZE_SU(fs));
if (time(&stamp) == -1)
fatal("time: %s", strerror(errno));
lfs_sb_settstamp(fs, stamp);
if (version == 1)
lfs_sb_setotstamp(fs, stamp);
if ((sb_interval = lfs_sb_getnseg(fs) / LFS_MAXNUMSB) < LFS_MIN_SBINTERVAL)
sb_interval = LFS_MIN_SBINTERVAL;
/*
* Figure out where the superblocks are going to live.
*
* Make segment 0 start at either zero, or LFS_LABELPAD, or
* >= LFS_SBPAD+LFS_LABELPAD, in order to prevent segment 0
* from having half a superblock in it.
*/
if (LFS_FSBTODB(fs, LFS_DBTOFSB(fs, start)) != start)
fatal("Segment 0 offset is not multiple of frag size\n");
if (start != 0 && dbtob(start) != LFS_LABELPAD &&
dbtob(start) < LFS_SBPAD + LFS_LABELPAD) {
fatal("Using flags \"-O %" PRId64 "\" would result in the "
"first segment containing only\npart of a superblock. "
"Please choose an offset of 0, %d, or %d or more,\n",
start, btodb(LFS_LABELPAD),
btodb(LFS_LABELPAD + LFS_SBPAD));
}
lfs_sb_setsboff(fs, 0, label_fsb);
if (version == 1)
lfs_sb_sets0addr(fs, lfs_sb_getsboff(fs, 0));
else
lfs_sb_sets0addr(fs, LFS_DBTOFSB(fs, start));
lfs_sb_subdsize(fs, sb_fsb);
for (i = 1; i < LFS_MAXNUMSB; i++) {
sb_addr = ((i * sb_interval) * lfs_segtod(fs, 1))
+ lfs_sb_getsboff(fs, 0);
/* Segment 0 eats the label, except for version 1 */
if (lfs_sb_getversion(fs) > 1 && lfs_sb_gets0addr(fs) < label_fsb)
sb_addr -= label_fsb - start;
if (sb_addr + sizeof(struct dlfs)
>= LFS_DBTOFSB(fs, dkw->dkw_size))
break;
lfs_sb_setsboff(fs, i, sb_addr);
lfs_sb_subdsize(fs, sb_fsb);
}
/* We need >= 2 superblocks */
if (lfs_sb_getsboff(fs, 1) == 0x0) {
fatal("Could not assign a disk address for the second "
"superblock.\nPlease decrease the segment size.\n");
}
lfs_sb_setlastseg(fs, lfs_sntod(fs, lfs_sb_getnseg(fs) - 2));
lfs_sb_setcurseg(fs, lfs_sntod(fs, lfs_sb_getnseg(fs) - 1));
lfs_sb_setoffset(fs, lfs_sntod(fs, lfs_sb_getnseg(fs)));
lfs_sb_setnextseg(fs, lfs_sntod(fs, 0));
/*
* Initialize the Ifile inode. Do this before we do anything
* with the Ifile or segment tables.
*
* XXX: is there some reason this allocates a new dinode? we
* already have an empty one generated by vget.
*/
dip = malloc(sizeof(*dip));
if (dip == NULL)
err(1, NULL);
memset(dip, 0, sizeof(*dip));
VTOI(fs->lfs_ivnode)->i_din = dip;
lfs_dino_setmode(fs, dip, LFS_IFREG | 0600);
lfs_dino_setflags(fs, dip, SF_IMMUTABLE);
make_dinode(LFS_IFILE_INUM, dip,
lfs_blkstofrags(fs, lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs) + 1), fs);
lfs_dino_setsize(fs, dip, (lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs) + 1) << lfs_sb_getbshift(fs));
for (i = 0; i < ULFS_NDADDR && i < (lfs_dino_getsize(fs, dip) >> lfs_sb_getbshift(fs)); i++)
VTOI(fs->lfs_ivnode)->i_lfs_fragsize[i] = lfs_sb_getbsize(fs);
/*
* Set up in-superblock segment usage cache
*/
fs->lfs_suflags = (u_int32_t **) malloc(2 * sizeof(u_int32_t *));
if (fs->lfs_suflags == NULL)
err(1, NULL);
fs->lfs_suflags[0] = (u_int32_t *) malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t));
if (fs->lfs_suflags[0] == NULL)
err(1, NULL);
fs->lfs_suflags[1] = (u_int32_t *) malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t));
if (fs->lfs_suflags[1] == NULL)
err(1, NULL);
/*
* Initialize the cleanerinfo block
*/
LFS_CLEANERINFO(cip, fs, bp);
lfs_ci_setclean(fs, cip, lfs_sb_getnseg(fs));
lfs_ci_setdirty(fs, cip, 0);
if (version > 1) {
lfs_ci_setfree_head(fs, cip, HIGHEST_USED_INO + 1);
lfs_ci_setfree_tail(fs, cip, lfs_sb_getifpb(fs) - 1);
}
LFS_SYNC_CLEANERINFO(cip, fs, bp, 1);
/*
* Run through segment table and initialize that
*/
for (i = j = 0; i < lfs_sb_getnseg(fs); i++) {
LFS_SEGENTRY(segp, fs, i, bp);
if (i == 0 &&
lfs_sb_gets0addr(fs) < lfs_btofsb(fs, LFS_LABELPAD + LFS_SBPAD)) {
segp->su_flags = SEGUSE_SUPERBLOCK;
lfs_sb_subbfree(fs, sb_fsb);
++j;
}
if (i > 0) {
if ((i % sb_interval) == 0 && j < LFS_MAXNUMSB) {
segp->su_flags = SEGUSE_SUPERBLOCK;
lfs_sb_subbfree(fs, sb_fsb);
++j;
} else
segp->su_flags = 0;
}
segp->su_lastmod = 0;
segp->su_nbytes = 0;
segp->su_ninos = 0;
segp->su_nsums = 0;
LFS_WRITESEGENTRY(segp, fs, i, bp);
}
/* Initialize root directory */
vp = lfs_raw_vget(fs, ULFS_ROOTINO, devfd, 0x0);
dip = VTOI(vp)->i_din;
make_dinode(ULFS_ROOTINO, dip, howmany(LFS_DIRBLKSIZ, lfs_sb_getfsize(fs)), fs);
lfs_dino_setmode(fs, dip, LFS_IFDIR | UMASK);
VTOI(vp)->i_lfs_osize = LFS_DIRBLKSIZ;
#ifdef MAKE_LF_DIR
VTOI(vp)->i_nlink = 3;
#else
VTOI(vp)->i_nlink = 2;
#endif
VTOI(vp)->i_lfs_effnblks =
lfs_btofsb(fs, roundup(LFS_DIRBLKSIZ, lfs_sb_getfsize(fs)));
lfs_dino_setsize(fs, dip, VTOI(vp)->i_lfs_osize);
lfs_dino_setnlink(fs, dip, VTOI(vp)->i_nlink);
lfs_dino_setblocks(fs, dip, VTOI(vp)->i_lfs_effnblks);
for (i = 0; i < ULFS_NDADDR && i < howmany(LFS_DIRBLKSIZ, lfs_sb_getbsize(fs)); i++)
VTOI(vp)->i_lfs_fragsize[i] = lfs_sb_getbsize(fs);
if (LFS_DIRBLKSIZ < lfs_sb_getbsize(fs))
VTOI(vp)->i_lfs_fragsize[i - 1] =
roundup(LFS_DIRBLKSIZ, lfs_sb_getfsize(fs));
bread(vp, 0, lfs_sb_getfsize(fs), 0, &bp);
make_dir(fs, bp->b_data, lfs_root_dir, __arraycount(lfs_root_dir));
VOP_BWRITE(bp);
#ifdef MAKE_LF_DIR
/* Initialize lost+found directory */
vp = lfs_raw_vget(fs, LOSTFOUNDINO, devfd, 0x0);
dip = VTOI(vp)->i_din.ffs1_din;
make_dinode(LOSTFOUNDINO, dip, howmany(DIRBLKSIZ,fs->lfs_fsize), fs);
dip->di_mode = IFDIR | UMASK;
VTOI(vp)->i_lfs_osize = dip->di_size = DIRBLKSIZ;
VTOI(vp)->i_nlink = dip->di_nlink = 2;
VTOI(vp)->i_lfs_effnblks = dip->di_blocks =
lfs_btofsb(fs, roundup(DIRBLKSIZ,fs->lfs_fsize));
for (i = 0; i < ULFS_NDADDR && i < howmany(DIRBLKSIZ, lfs_sb_getbsize(fs)); i++)
VTOI(vp)->i_lfs_fragsize[i] = lfs_sb_getbsize(fs);
if (DIRBLKSIZ < lfs_sb_getbsize(fs))
VTOI(vp)->i_lfs_fragsize[i - 1] =
roundup(DIRBLKSIZ,fs->lfs_fsize);
bread(vp, 0, fs->lfs_fsize, 0, &bp);
make_dir(fs, bp->b_data, lfs_lf_dir, __arraycount(lfs_lf_dir));
VOP_BWRITE(bp);
#endif /* MAKE_LF_DIR */
/* Set their IFILE entry version numbers to 1 */
LFS_IENTRY(ipall, fs, 1, bp);
if (is64) {
ip64 = &ipall->u_64;
for (i = LFS_IFILE_INUM; i <= HIGHEST_USED_INO; i++) {
ip64->if_version = 1;
ip64->if_daddr = 0x0;
ip64->if_nextfree = 0;
++ip64;
}
} else if (version > 1) {
ip32 = &ipall->u_32;
for (i = LFS_IFILE_INUM; i <= HIGHEST_USED_INO; i++) {
ip32->if_version = 1;
ip32->if_daddr = 0x0;
ip32->if_nextfree = 0;
++ip32;
}
} else {
ip_v1 = &ipall->u_v1;
for (i = LFS_IFILE_INUM; i <= HIGHEST_USED_INO; i++) {
ip_v1->if_version = 1;
ip_v1->if_daddr = 0x0;
ip_v1->if_nextfree = 0;
++ip_v1;
}
}
/* Link remaining IFILE entries in free list */
if (is64) {
for (;
i < lfs_sb_getifpb(fs); ++ip64) {
ip64->if_version = 1;
ip64->if_daddr = LFS_UNUSED_DADDR;
ip64->if_nextfree = ++i;
}
--ip64;
ip64->if_nextfree = LFS_UNUSED_INUM;
} else if (version > 1) {
for (;
i < lfs_sb_getifpb(fs); ++ip32) {
ip32->if_version = 1;
ip32->if_daddr = LFS_UNUSED_DADDR;
ip32->if_nextfree = ++i;
}
--ip32;
ip32->if_nextfree = LFS_UNUSED_INUM;
} else {
for (;
i < lfs_sb_getifpb(fs); ++ip_v1) {
ip_v1->if_version = 1;
ip_v1->if_daddr = LFS_UNUSED_DADDR;
ip_v1->if_nextfree = ++i;
}
--ip_v1;
ip_v1->if_nextfree = LFS_UNUSED_INUM;
}
VOP_BWRITE(bp);
/* Write it all to disk. */
if (!Nflag)
lfs_segwrite(fs, SEGM_CKP);
/*
* Now that we've written everything, look to see what's available
* for writing.
*/
lfs_sb_setavail(fs, 0);
bb = ubb = dmeta = 0;
for (i = 0; i < lfs_sb_getnseg(fs); i++) {
LFS_SEGENTRY(segp, fs, i, bp);
if (segp->su_flags & SEGUSE_DIRTY) {
bb += lfs_btofsb(fs, segp->su_nbytes +
segp->su_nsums * lfs_sb_getsumsize(fs));
ubb += lfs_btofsb(fs, segp->su_nbytes +
segp->su_nsums * lfs_sb_getsumsize(fs) +
segp->su_ninos * lfs_sb_getibsize(fs));
dmeta += lfs_btofsb(fs,
lfs_sb_getsumsize(fs) * segp->su_nsums);
dmeta += lfs_btofsb(fs,
lfs_sb_getibsize(fs) * segp->su_ninos);
} else {
lfs_sb_addavail(fs, lfs_segtod(fs, 1));
if (segp->su_flags & SEGUSE_SUPERBLOCK)
lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_SBPAD));
if (i == 0 && lfs_sb_getversion(fs) > 1 &&
lfs_sb_gets0addr(fs) < lfs_btofsb(fs, LFS_LABELPAD))
lfs_sb_subavail(fs, lfs_btofsb(fs, LFS_LABELPAD) -
lfs_sb_gets0addr(fs));
}
brelse(bp, 0);
}
/* Also may be available bytes in current seg */
i = lfs_dtosn(fs, lfs_sb_getoffset(fs));
lfs_sb_addavail(fs, lfs_sntod(fs, i + 1) - lfs_sb_getoffset(fs));
/* But do not count minfreesegs */
lfs_sb_subavail(fs, lfs_segtod(fs, (lfs_sb_getminfreeseg(fs) - (lfs_sb_getminfreeseg(fs) / 2))));
labelskew = 0;
if (lfs_sb_getversion(fs) > 1 && lfs_sb_gets0addr(fs) < lfs_btofsb(fs, LFS_LABELPAD))
labelskew = lfs_btofsb(fs, LFS_LABELPAD);
lfs_sb_setbfree(fs, lfs_sb_getdsize(fs) - labelskew - (ubb + bb) / 2);
/* Put that in the Ifile version too, and write it */
LFS_CLEANERINFO(cip, fs, bp);
lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs));
lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs));
LFS_SYNC_CLEANERINFO(cip, fs, bp, 1);
if (!Nflag)
lfs_segwrite(fs, SEGM_CKP);
/*
* Finally write out superblocks.
*/
printf("super-block backups (for fsck -b #) at:\n");
curw = 0;
for (i = 0; i < LFS_MAXNUMSB; i++) {
seg_addr = lfs_sb_getsboff(fs, i);
if (seg_addr == 0)
break;
if (i != 0)
curw += printf(", ");
ww = snprintf(tbuf, sizeof(tbuf), "%lld",
(long long)LFS_FSBTODB(fs, seg_addr));
curw += ww;
if (curw >= 78) {
printf("\n%s", tbuf);
curw = ww;
} else
printf("%s", tbuf);
fflush(stdout);
/* Leave the time stamp on the alt sb, zero the rest */
if (i == 2) {
lfs_sb_settstamp(fs, 0);
lfs_sb_setcksum(fs, lfs_sb_cksum(fs));
}
if (!Nflag)
lfs_writesuper(fs, seg_addr);
}
printf(".\n");
return 0;
}
/*
* Compatibility with fsck_lfs, since the "generic" LFS userland code uses it.
*/
void
pwarn(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
Reference in New Issue View Git Blame Copy Permalink