846 lines
26 KiB
C
846 lines
26 KiB
C
/* $NetBSD: mkfs.c,v 1.32 2013/10/19 17:16:37 christos Exp $ */
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/*
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program
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*
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* Copyright (c) 1980, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95";
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#else
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#ifdef __RCSID
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__RCSID("$NetBSD: mkfs.c,v 1.32 2013/10/19 17:16:37 christos Exp $");
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#endif
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <util.h>
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#include "makefs.h"
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#include "ffs.h"
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <ufs/ffs/fs.h>
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#include "ffs/ufs_inode.h"
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#include "ffs/ffs_extern.h"
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#include "ffs/newfs_extern.h"
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static void initcg(int, time_t, const fsinfo_t *);
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static int ilog2(int);
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static int count_digits(int);
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/*
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* make file system for cylinder-group style file systems
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*/
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#define UMASK 0755
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#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
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union {
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struct fs fs;
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char pad[SBLOCKSIZE];
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} fsun;
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#define sblock fsun.fs
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struct csum *fscs;
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union {
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struct cg cg;
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char pad[FFS_MAXBSIZE];
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} cgun;
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#define acg cgun.cg
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char *iobuf;
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int iobufsize;
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char writebuf[FFS_MAXBSIZE];
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static int Oflag; /* format as an 4.3BSD file system */
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static int64_t fssize; /* file system size */
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static int sectorsize; /* bytes/sector */
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static int fsize; /* fragment size */
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static int bsize; /* block size */
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static int maxbsize; /* maximum clustering */
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static int maxblkspercg;
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static int minfree; /* free space threshold */
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static int opt; /* optimization preference (space or time) */
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static int density; /* number of bytes per inode */
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static int maxcontig; /* max contiguous blocks to allocate */
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static int maxbpg; /* maximum blocks per file in a cyl group */
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static int bbsize; /* boot block size */
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static int sbsize; /* superblock size */
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static int avgfilesize; /* expected average file size */
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static int avgfpdir; /* expected number of files per directory */
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struct fs *
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ffs_mkfs(const char *fsys, const fsinfo_t *fsopts)
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{
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int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg;
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int32_t cylno, i, csfrags;
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long long sizepb;
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void *space;
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int size;
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int nprintcols, printcolwidth;
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ffs_opt_t *ffs_opts = fsopts->fs_specific;
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Oflag = ffs_opts->version;
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fssize = fsopts->size / fsopts->sectorsize;
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sectorsize = fsopts->sectorsize;
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fsize = ffs_opts->fsize;
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bsize = ffs_opts->bsize;
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maxbsize = ffs_opts->maxbsize;
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maxblkspercg = ffs_opts->maxblkspercg;
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minfree = ffs_opts->minfree;
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opt = ffs_opts->optimization;
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density = ffs_opts->density;
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maxcontig = ffs_opts->maxcontig;
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maxbpg = ffs_opts->maxbpg;
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avgfilesize = ffs_opts->avgfilesize;
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avgfpdir = ffs_opts->avgfpdir;
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bbsize = BBSIZE;
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sbsize = SBLOCKSIZE;
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strlcpy((char *)sblock.fs_volname, ffs_opts->label,
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sizeof(sblock.fs_volname));
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if (Oflag == 0) {
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sblock.fs_old_inodefmt = FS_42INODEFMT;
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sblock.fs_maxsymlinklen = 0;
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sblock.fs_old_flags = 0;
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} else {
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sblock.fs_old_inodefmt = FS_44INODEFMT;
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sblock.fs_maxsymlinklen = (Oflag == 1 ? UFS1_MAXSYMLINKLEN :
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UFS2_MAXSYMLINKLEN);
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sblock.fs_old_flags = FS_FLAGS_UPDATED;
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sblock.fs_flags = 0;
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}
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/*
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* Validate the given file system size.
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* Verify that its last block can actually be accessed.
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* Convert to file system fragment sized units.
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*/
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if (fssize <= 0) {
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printf("preposterous size %lld\n", (long long)fssize);
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exit(13);
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}
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ffs_wtfs(fssize - 1, sectorsize, (char *)&sblock, fsopts);
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/*
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* collect and verify the filesystem density info
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*/
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sblock.fs_avgfilesize = avgfilesize;
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sblock.fs_avgfpdir = avgfpdir;
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if (sblock.fs_avgfilesize <= 0)
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printf("illegal expected average file size %d\n",
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sblock.fs_avgfilesize), exit(14);
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if (sblock.fs_avgfpdir <= 0)
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printf("illegal expected number of files per directory %d\n",
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sblock.fs_avgfpdir), exit(15);
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/*
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* collect and verify the block and fragment sizes
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*/
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sblock.fs_bsize = bsize;
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sblock.fs_fsize = fsize;
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if (!POWEROF2(sblock.fs_bsize)) {
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printf("block size must be a power of 2, not %d\n",
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sblock.fs_bsize);
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exit(16);
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}
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if (!POWEROF2(sblock.fs_fsize)) {
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printf("fragment size must be a power of 2, not %d\n",
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sblock.fs_fsize);
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exit(17);
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}
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if (sblock.fs_fsize < sectorsize) {
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printf("fragment size %d is too small, minimum is %d\n",
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sblock.fs_fsize, sectorsize);
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exit(18);
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}
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if (sblock.fs_bsize < MINBSIZE) {
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printf("block size %d is too small, minimum is %d\n",
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sblock.fs_bsize, MINBSIZE);
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exit(19);
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}
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if (sblock.fs_bsize > FFS_MAXBSIZE) {
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printf("block size %d is too large, maximum is %d\n",
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sblock.fs_bsize, FFS_MAXBSIZE);
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exit(19);
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}
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if (sblock.fs_bsize < sblock.fs_fsize) {
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printf("block size (%d) cannot be smaller than fragment size (%d)\n",
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sblock.fs_bsize, sblock.fs_fsize);
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exit(20);
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}
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if (maxbsize < bsize || !POWEROF2(maxbsize)) {
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sblock.fs_maxbsize = sblock.fs_bsize;
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printf("Extent size set to %d\n", sblock.fs_maxbsize);
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} else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) {
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sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize;
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printf("Extent size reduced to %d\n", sblock.fs_maxbsize);
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} else {
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sblock.fs_maxbsize = maxbsize;
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}
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sblock.fs_maxcontig = maxcontig;
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if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) {
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sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize;
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printf("Maxcontig raised to %d\n", sblock.fs_maxbsize);
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}
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if (sblock.fs_maxcontig > 1)
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sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG);
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sblock.fs_bmask = ~(sblock.fs_bsize - 1);
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sblock.fs_fmask = ~(sblock.fs_fsize - 1);
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sblock.fs_qbmask = ~sblock.fs_bmask;
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sblock.fs_qfmask = ~sblock.fs_fmask;
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for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1)
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sblock.fs_bshift++;
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for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1)
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sblock.fs_fshift++;
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sblock.fs_frag = ffs_numfrags(&sblock, sblock.fs_bsize);
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for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1)
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sblock.fs_fragshift++;
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if (sblock.fs_frag > MAXFRAG) {
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printf("fragment size %d is too small, "
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"minimum with block size %d is %d\n",
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sblock.fs_fsize, sblock.fs_bsize,
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sblock.fs_bsize / MAXFRAG);
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exit(21);
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}
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sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize);
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sblock.fs_size = fssize = FFS_DBTOFSB(&sblock, fssize);
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if (Oflag <= 1) {
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sblock.fs_magic = FS_UFS1_MAGIC;
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sblock.fs_sblockloc = SBLOCK_UFS1;
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sblock.fs_nindir = sblock.fs_bsize / sizeof(int32_t);
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sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
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sblock.fs_maxsymlinklen = ((UFS_NDADDR + UFS_NIADDR) *
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sizeof (int32_t));
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sblock.fs_old_inodefmt = FS_44INODEFMT;
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sblock.fs_old_cgoffset = 0;
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sblock.fs_old_cgmask = 0xffffffff;
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sblock.fs_old_size = sblock.fs_size;
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sblock.fs_old_rotdelay = 0;
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sblock.fs_old_rps = 60;
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sblock.fs_old_nspf = sblock.fs_fsize / sectorsize;
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sblock.fs_old_cpg = 1;
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sblock.fs_old_interleave = 1;
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sblock.fs_old_trackskew = 0;
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sblock.fs_old_cpc = 0;
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sblock.fs_old_postblformat = 1;
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sblock.fs_old_nrpos = 1;
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} else {
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sblock.fs_magic = FS_UFS2_MAGIC;
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#if 0 /* XXX makefs is used for small filesystems. */
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sblock.fs_sblockloc = SBLOCK_UFS2;
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#else
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sblock.fs_sblockloc = SBLOCK_UFS1;
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#endif
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sblock.fs_nindir = sblock.fs_bsize / sizeof(int64_t);
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sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
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sblock.fs_maxsymlinklen = ((UFS_NDADDR + UFS_NIADDR) *
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sizeof (int64_t));
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}
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sblock.fs_sblkno =
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roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize),
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sblock.fs_frag);
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sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno +
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roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag));
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sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
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sblock.fs_maxfilesize = sblock.fs_bsize * UFS_NDADDR - 1;
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for (sizepb = sblock.fs_bsize, i = 0; i < UFS_NIADDR; i++) {
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sizepb *= FFS_NINDIR(&sblock);
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sblock.fs_maxfilesize += sizepb;
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}
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/*
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* Calculate the number of blocks to put into each cylinder group.
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*
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* This algorithm selects the number of blocks per cylinder
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* group. The first goal is to have at least enough data blocks
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* in each cylinder group to meet the density requirement. Once
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* this goal is achieved we try to expand to have at least
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* 1 cylinder group. Once this goal is achieved, we pack as
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* many blocks into each cylinder group map as will fit.
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*
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* We start by calculating the smallest number of blocks that we
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* can put into each cylinder group. If this is too big, we reduce
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* the density until it fits.
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*/
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origdensity = density;
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for (;;) {
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fragsperinode = MAX(ffs_numfrags(&sblock, density), 1);
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minfpg = fragsperinode * FFS_INOPB(&sblock);
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if (minfpg > sblock.fs_size)
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minfpg = sblock.fs_size;
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sblock.fs_ipg = FFS_INOPB(&sblock);
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sblock.fs_fpg = roundup(sblock.fs_iblkno +
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sblock.fs_ipg / FFS_INOPF(&sblock), sblock.fs_frag);
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if (sblock.fs_fpg < minfpg)
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sblock.fs_fpg = minfpg;
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sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
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FFS_INOPB(&sblock));
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sblock.fs_fpg = roundup(sblock.fs_iblkno +
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sblock.fs_ipg / FFS_INOPF(&sblock), sblock.fs_frag);
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if (sblock.fs_fpg < minfpg)
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sblock.fs_fpg = minfpg;
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sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
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FFS_INOPB(&sblock));
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if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
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break;
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density -= sblock.fs_fsize;
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}
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if (density != origdensity)
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printf("density reduced from %d to %d\n", origdensity, density);
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if (maxblkspercg <= 0 || maxblkspercg >= fssize)
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maxblkspercg = fssize - 1;
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/*
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* Start packing more blocks into the cylinder group until
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* it cannot grow any larger, the number of cylinder groups
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* drops below 1, or we reach the size requested.
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*/
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for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) {
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sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
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FFS_INOPB(&sblock));
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if (sblock.fs_size / sblock.fs_fpg < 1)
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break;
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if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
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continue;
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if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize)
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break;
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sblock.fs_fpg -= sblock.fs_frag;
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sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
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FFS_INOPB(&sblock));
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break;
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}
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/*
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* Check to be sure that the last cylinder group has enough blocks
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* to be viable. If it is too small, reduce the number of blocks
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* per cylinder group which will have the effect of moving more
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* blocks into the last cylinder group.
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*/
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optimalfpg = sblock.fs_fpg;
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for (;;) {
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sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
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lastminfpg = roundup(sblock.fs_iblkno +
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sblock.fs_ipg / FFS_INOPF(&sblock), sblock.fs_frag);
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if (sblock.fs_size < lastminfpg) {
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printf("Filesystem size %lld < minimum size of %d\n",
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(long long)sblock.fs_size, lastminfpg);
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exit(28);
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}
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if (sblock.fs_size % sblock.fs_fpg >= lastminfpg ||
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sblock.fs_size % sblock.fs_fpg == 0)
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break;
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sblock.fs_fpg -= sblock.fs_frag;
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sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
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FFS_INOPB(&sblock));
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}
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if (optimalfpg != sblock.fs_fpg)
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printf("Reduced frags per cylinder group from %d to %d %s\n",
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optimalfpg, sblock.fs_fpg, "to enlarge last cyl group");
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sblock.fs_cgsize = ffs_fragroundup(&sblock, CGSIZE(&sblock));
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sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / FFS_INOPF(&sblock);
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if (Oflag <= 1) {
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sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf;
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sblock.fs_old_nsect = sblock.fs_old_spc;
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sblock.fs_old_npsect = sblock.fs_old_spc;
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sblock.fs_old_ncyl = sblock.fs_ncg;
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}
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/*
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* fill in remaining fields of the super block
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*/
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sblock.fs_csaddr = cgdmin(&sblock, 0);
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sblock.fs_cssize =
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ffs_fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
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/*
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* Setup memory for temporary in-core cylgroup summaries.
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* Cribbed from ffs_mountfs().
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*/
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size = sblock.fs_cssize;
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if (sblock.fs_contigsumsize > 0)
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size += sblock.fs_ncg * sizeof(int32_t);
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space = ecalloc(1, size);
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sblock.fs_csp = space;
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space = (char *)space + sblock.fs_cssize;
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if (sblock.fs_contigsumsize > 0) {
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int32_t *lp;
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sblock.fs_maxcluster = lp = space;
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for (i = 0; i < sblock.fs_ncg; i++)
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*lp++ = sblock.fs_contigsumsize;
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|
}
|
|
|
|
sblock.fs_sbsize = ffs_fragroundup(&sblock, sizeof(struct fs));
|
|
if (sblock.fs_sbsize > SBLOCKSIZE)
|
|
sblock.fs_sbsize = SBLOCKSIZE;
|
|
sblock.fs_minfree = minfree;
|
|
sblock.fs_maxcontig = maxcontig;
|
|
sblock.fs_maxbpg = maxbpg;
|
|
sblock.fs_optim = opt;
|
|
sblock.fs_cgrotor = 0;
|
|
sblock.fs_pendingblocks = 0;
|
|
sblock.fs_pendinginodes = 0;
|
|
sblock.fs_cstotal.cs_ndir = 0;
|
|
sblock.fs_cstotal.cs_nbfree = 0;
|
|
sblock.fs_cstotal.cs_nifree = 0;
|
|
sblock.fs_cstotal.cs_nffree = 0;
|
|
sblock.fs_fmod = 0;
|
|
sblock.fs_ronly = 0;
|
|
sblock.fs_state = 0;
|
|
sblock.fs_clean = FS_ISCLEAN;
|
|
sblock.fs_ronly = 0;
|
|
sblock.fs_id[0] = start_time.tv_sec;
|
|
sblock.fs_id[1] = 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 =
|
|
ffs_fragstoblks(&sblock, sblock.fs_dsize) -
|
|
howmany(csfrags, sblock.fs_frag);
|
|
sblock.fs_cstotal.cs_nffree =
|
|
ffs_fragnum(&sblock, sblock.fs_size) +
|
|
(ffs_fragnum(&sblock, csfrags) > 0 ?
|
|
sblock.fs_frag - ffs_fragnum(&sblock, csfrags) : 0);
|
|
sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - UFS_ROOTINO;
|
|
sblock.fs_cstotal.cs_ndir = 0;
|
|
sblock.fs_dsize -= csfrags;
|
|
sblock.fs_time = start_time.tv_sec;
|
|
if (Oflag <= 1) {
|
|
sblock.fs_old_time = start_time.tv_sec;
|
|
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 (%lld sectors) block size %d, "
|
|
"fragment size %d\n",
|
|
fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
|
|
(long long)FFS_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);
|
|
#undef B2MBFACTOR
|
|
/*
|
|
* Now determine how wide each column will be, and calculate how
|
|
* many columns will fit in a 76 char line. 76 is the width of the
|
|
* subwindows in sysinst.
|
|
*/
|
|
printcolwidth = count_digits(
|
|
FFS_FSBTODB(&sblock, cgsblock(&sblock, sblock.fs_ncg -1)));
|
|
nprintcols = 76 / (printcolwidth + 2);
|
|
|
|
/*
|
|
* 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;
|
|
iobuf = ecalloc(1, iobufsize);
|
|
/*
|
|
* Make a copy of the superblock into the buffer that we will be
|
|
* writing out in each cylinder group.
|
|
*/
|
|
memcpy(writebuf, &sblock, sbsize);
|
|
if (fsopts->needswap)
|
|
ffs_sb_swap(&sblock, (struct fs*)writebuf);
|
|
memcpy(iobuf, writebuf, SBLOCKSIZE);
|
|
|
|
printf("super-block backups (for fsck -b #) at:");
|
|
for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
|
|
initcg(cylno, start_time.tv_sec, fsopts);
|
|
if (cylno % nprintcols == 0)
|
|
printf("\n");
|
|
printf(" %*lld,", printcolwidth,
|
|
(long long)FFS_FSBTODB(&sblock, cgsblock(&sblock, cylno)));
|
|
fflush(stdout);
|
|
}
|
|
printf("\n");
|
|
|
|
/*
|
|
* Now construct the initial file system,
|
|
* then write out the super-block.
|
|
*/
|
|
sblock.fs_time = start_time.tv_sec;
|
|
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 (fsopts->needswap)
|
|
sblock.fs_flags |= FS_SWAPPED;
|
|
ffs_write_superblock(&sblock, fsopts);
|
|
return (&sblock);
|
|
}
|
|
|
|
/*
|
|
* Write out the superblock and its duplicates,
|
|
* and the cylinder group summaries
|
|
*/
|
|
void
|
|
ffs_write_superblock(struct fs *fs, const fsinfo_t *fsopts)
|
|
{
|
|
int cylno, size, blks, i, saveflag;
|
|
void *space;
|
|
char *wrbuf;
|
|
|
|
saveflag = fs->fs_flags & FS_INTERNAL;
|
|
fs->fs_flags &= ~FS_INTERNAL;
|
|
|
|
memcpy(writebuf, &sblock, sbsize);
|
|
if (fsopts->needswap)
|
|
ffs_sb_swap(fs, (struct fs*)writebuf);
|
|
ffs_wtfs(fs->fs_sblockloc / sectorsize, sbsize, writebuf, fsopts);
|
|
|
|
/* Write out the duplicate super blocks */
|
|
for (cylno = 0; cylno < fs->fs_ncg; cylno++)
|
|
ffs_wtfs(FFS_FSBTODB(fs, cgsblock(fs, cylno)),
|
|
sbsize, writebuf, fsopts);
|
|
|
|
/* Write out the cylinder group summaries */
|
|
size = fs->fs_cssize;
|
|
blks = howmany(size, fs->fs_fsize);
|
|
space = (void *)fs->fs_csp;
|
|
wrbuf = emalloc(size);
|
|
for (i = 0; i < blks; i+= fs->fs_frag) {
|
|
size = fs->fs_bsize;
|
|
if (i + fs->fs_frag > blks)
|
|
size = (blks - i) * fs->fs_fsize;
|
|
if (fsopts->needswap)
|
|
ffs_csum_swap((struct csum *)space,
|
|
(struct csum *)wrbuf, size);
|
|
else
|
|
memcpy(wrbuf, space, (u_int)size);
|
|
ffs_wtfs(FFS_FSBTODB(fs, fs->fs_csaddr + i), size, wrbuf, fsopts);
|
|
space = (char *)space + size;
|
|
}
|
|
free(wrbuf);
|
|
fs->fs_flags |= saveflag;
|
|
}
|
|
|
|
/*
|
|
* Initialize a cylinder group.
|
|
*/
|
|
static void
|
|
initcg(int cylno, time_t utime, const fsinfo_t *fsopts)
|
|
{
|
|
daddr_t cbase, dmax;
|
|
int i, j, d, dlower, dupper, blkno;
|
|
struct ufs1_dinode *dp1;
|
|
struct ufs2_dinode *dp2;
|
|
int start;
|
|
|
|
/*
|
|
* 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);
|
|
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 * FFS_INOPB(&sblock) ?
|
|
sblock.fs_ipg : 2 * FFS_INOPB(&sblock);
|
|
acg.cg_ndblk = dmax - cbase;
|
|
if (sblock.fs_contigsumsize > 0)
|
|
acg.cg_nclusterblks = acg.cg_ndblk >> sblock.fs_fragshift;
|
|
start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
|
|
if (Oflag == 2) {
|
|
acg.cg_iusedoff = start;
|
|
} else {
|
|
if (cylno == sblock.fs_ncg - 1)
|
|
acg.cg_old_ncyl = howmany(acg.cg_ndblk,
|
|
sblock.fs_fpg / sblock.fs_old_cpg);
|
|
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);
|
|
if (sblock.fs_contigsumsize <= 0) {
|
|
acg.cg_nextfreeoff = acg.cg_freeoff +
|
|
howmany(sblock.fs_fpg, CHAR_BIT);
|
|
} else {
|
|
acg.cg_clustersumoff = acg.cg_freeoff +
|
|
howmany(sblock.fs_fpg, CHAR_BIT) - sizeof(int32_t);
|
|
acg.cg_clustersumoff =
|
|
roundup(acg.cg_clustersumoff, sizeof(int32_t));
|
|
acg.cg_clusteroff = acg.cg_clustersumoff +
|
|
(sblock.fs_contigsumsize + 1) * sizeof(int32_t);
|
|
acg.cg_nextfreeoff = acg.cg_clusteroff +
|
|
howmany(ffs_fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
|
|
}
|
|
if (acg.cg_nextfreeoff > sblock.fs_cgsize) {
|
|
printf("Panic: cylinder group too big\n");
|
|
exit(37);
|
|
}
|
|
acg.cg_cs.cs_nifree += sblock.fs_ipg;
|
|
if (cylno == 0) {
|
|
size_t r;
|
|
|
|
for (r = 0; r < UFS_ROOTINO; r++) {
|
|
setbit(cg_inosused(&acg, 0), r);
|
|
acg.cg_cs.cs_nifree--;
|
|
}
|
|
}
|
|
if (cylno > 0) {
|
|
/*
|
|
* In cylno 0, beginning space is reserved
|
|
* for boot and super blocks.
|
|
*/
|
|
for (d = 0, blkno = 0; d < dlower;) {
|
|
ffs_setblock(&sblock, cg_blksfree(&acg, 0), blkno);
|
|
if (sblock.fs_contigsumsize > 0)
|
|
setbit(cg_clustersfree(&acg, 0), blkno);
|
|
acg.cg_cs.cs_nbfree++;
|
|
d += sblock.fs_frag;
|
|
blkno++;
|
|
}
|
|
}
|
|
if ((i = (dupper & (sblock.fs_frag - 1))) != 0) {
|
|
acg.cg_frsum[sblock.fs_frag - i]++;
|
|
for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
|
|
setbit(cg_blksfree(&acg, 0), dupper);
|
|
acg.cg_cs.cs_nffree++;
|
|
}
|
|
}
|
|
for (d = dupper, blkno = dupper >> sblock.fs_fragshift;
|
|
d + sblock.fs_frag <= acg.cg_ndblk; ) {
|
|
ffs_setblock(&sblock, cg_blksfree(&acg, 0), blkno);
|
|
if (sblock.fs_contigsumsize > 0)
|
|
setbit(cg_clustersfree(&acg, 0), blkno);
|
|
acg.cg_cs.cs_nbfree++;
|
|
d += sblock.fs_frag;
|
|
blkno++;
|
|
}
|
|
if (d < acg.cg_ndblk) {
|
|
acg.cg_frsum[acg.cg_ndblk - d]++;
|
|
for (; d < acg.cg_ndblk; d++) {
|
|
setbit(cg_blksfree(&acg, 0), d);
|
|
acg.cg_cs.cs_nffree++;
|
|
}
|
|
}
|
|
if (sblock.fs_contigsumsize > 0) {
|
|
int32_t *sump = cg_clustersum(&acg, 0);
|
|
u_char *mapp = cg_clustersfree(&acg, 0);
|
|
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]++;
|
|
}
|
|
}
|
|
sblock.fs_cs(&sblock, cylno) = 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;
|
|
memcpy(&iobuf[start], &acg, sblock.fs_cgsize);
|
|
if (fsopts->needswap)
|
|
ffs_cg_swap(&acg, (struct cg*)&iobuf[start], &sblock);
|
|
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) {
|
|
/* No need to swap, it'll stay random */
|
|
dp1->di_gen = random();
|
|
dp1++;
|
|
} else {
|
|
dp2->di_gen = random();
|
|
dp2++;
|
|
}
|
|
}
|
|
ffs_wtfs(FFS_FSBTODB(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf,
|
|
fsopts);
|
|
/*
|
|
* 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 / FFS_INOPF(&sblock);
|
|
i += sblock.fs_frag) {
|
|
dp1 = (struct ufs1_dinode *)(&iobuf[start]);
|
|
for (j = 0; j < FFS_INOPB(&sblock); j++) {
|
|
dp1->di_gen = random();
|
|
dp1++;
|
|
}
|
|
ffs_wtfs(FFS_FSBTODB(&sblock, cgimin(&sblock, cylno) + i),
|
|
sblock.fs_bsize, &iobuf[start], fsopts);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* read a block from the file system
|
|
*/
|
|
void
|
|
ffs_rdfs(daddr_t bno, int size, void *bf, const fsinfo_t *fsopts)
|
|
{
|
|
int n;
|
|
off_t offset;
|
|
|
|
offset = bno * fsopts->sectorsize + fsopts->offset;
|
|
if (lseek(fsopts->fd, offset, SEEK_SET) < 0)
|
|
err(1, "%s: seek error for sector %lld", __func__,
|
|
(long long)bno);
|
|
n = read(fsopts->fd, bf, size);
|
|
if (n == -1) {
|
|
err(1, "%s: read error bno %lld size %d", __func__,
|
|
(long long)bno, size);
|
|
}
|
|
else if (n != size)
|
|
errx(1, "%s: short read error for sector %lld", __func__,
|
|
(long long)bno);
|
|
}
|
|
|
|
/*
|
|
* write a block to the file system
|
|
*/
|
|
void
|
|
ffs_wtfs(daddr_t bno, int size, void *bf, const fsinfo_t *fsopts)
|
|
{
|
|
int n;
|
|
off_t offset;
|
|
|
|
offset = bno * fsopts->sectorsize + fsopts->offset;
|
|
if (lseek(fsopts->fd, offset, SEEK_SET) == -1)
|
|
err(1, "%s: seek error for sector %lld", __func__,
|
|
(long long)bno);
|
|
n = write(fsopts->fd, bf, size);
|
|
if (n == -1)
|
|
err(1, "%s: write error for sector %lld", __func__,
|
|
(long long)bno);
|
|
else if (n != size)
|
|
errx(1, "%s: short write error for sector %lld", __func__,
|
|
(long long)bno);
|
|
}
|
|
|
|
|
|
/* Determine how many digits are needed to print a given integer */
|
|
static int
|
|
count_digits(int num)
|
|
{
|
|
int ndig;
|
|
|
|
for(ndig = 1; num > 9; num /=10, ndig++);
|
|
|
|
return (ndig);
|
|
}
|
|
|
|
static int
|
|
ilog2(int val)
|
|
{
|
|
u_int n;
|
|
|
|
for (n = 0; n < sizeof(n) * CHAR_BIT; n++)
|
|
if (1 << n == val)
|
|
return (n);
|
|
errx(1, "%s: %d is not a power of 2", __func__, val);
|
|
}
|