9aba332745
Use only one filedescriptor. Open in R/O or R/W based in the '-N' option. Make the filedescriptor a global variable instead of passing it around as semi-global variable(s). Remove the undocumented ability to specify type without '-T' option. Replace fatal() with straight err(3)/errx(3). Save calls to strerror() where applicable. Loose the progname variable. Get the sense of the cpgflag test correct so we only issue warnings if people specify cpg and can't get that. It can be argued that this should be an error. Remove the check to see if the disk is mounted: Open for writing would fail if it were mounted. Attempt to get the sectorsize and mediasize with the generic disk ioctls, fall back to disklabel and /etc/disktab as we can. Notice that on-disk labels still take precedence over /etc/disktab, this is probably wrong, but not as wrong as the entire concept of /etc/disktab is. Sponsored by: DARPA & NAI Labs.
427 lines
12 KiB
C
427 lines
12 KiB
C
/*
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* Copyright (c) 1983, 1989, 1993, 1994
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* newfs: friendly front end to mkfs
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/file.h>
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#include <sys/mount.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdarg.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 <syslog.h>
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#include <unistd.h>
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#include "newfs.h"
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/*
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* The following two constants set the default block and fragment sizes.
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* Both constants must be a power of 2 and meet the following constraints:
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* MINBSIZE <= DESBLKSIZE <= MAXBSIZE
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* sectorsize <= DESFRAGSIZE <= DESBLKSIZE
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* DESBLKSIZE / DESFRAGSIZE <= 8
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*/
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#define DFL_FRAGSIZE 2048
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#define DFL_BLKSIZE 16384
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/*
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* Cylinder groups may have up to many cylinders. The actual
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* number used depends upon how much information can be stored
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* on a single cylinder. The default is to use as many as possible
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* cylinders per group.
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*/
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#define DESCPG 65536 /* desired fs_cpg ("infinity") */
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/*
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* MAXBLKPG determines the maximum number of data blocks which are
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* placed in a single cylinder group. The default is one indirect
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* block worth of data blocks.
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*/
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#define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t))
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/*
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* Each file system has a number of inodes statically allocated.
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* We allocate one inode slot per NFPI fragments, expecting this
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* to be far more than we will ever need.
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*/
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#define NFPI 4
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/*
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* About the same time as the above, we knew what went where on the disks.
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* no longer so, so kill the code which finds the different platters too...
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* We do this by saying one head, with a lot of sectors on it.
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* The number of sectors are used to determine the size of a cyl-group.
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* Kirk suggested one or two meg per "cylinder" so we say two.
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*/
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#define NSECTORS 4096 /* number of sectors */
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int Nflag; /* run without writing file system */
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int Rflag; /* regression test */
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int Uflag; /* enable soft updates for file system */
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u_int fssize; /* file system size */
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u_int secpercyl = NSECTORS; /* sectors per cylinder */
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u_int sectorsize; /* bytes/sector */
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int realsectorsize; /* bytes/sector in hardware */
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int fsize = 0; /* fragment size */
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int bsize = 0; /* block size */
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int cpg = DESCPG; /* cylinders/cylinder group */
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int cpgflg; /* cylinders/cylinder group flag was given */
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int minfree = MINFREE; /* free space threshold */
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int opt = DEFAULTOPT; /* optimization preference (space or time) */
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int density; /* number of bytes per inode */
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int maxcontig = 0; /* max contiguous blocks to allocate */
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int maxbpg; /* maximum blocks per file in a cyl group */
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int avgfilesize = AVFILESIZ;/* expected average file size */
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int avgfilesperdir = AFPDIR;/* expected number of files per directory */
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int fso; /* filedescriptor to device */
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static char device[MAXPATHLEN];
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static char *disktype;
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static int t_or_u_flag; /* user has specified -t or -u */
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static int unlabeled;
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static struct disklabel *getdisklabel(char *s);
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static void rewritelabel(char *s, struct disklabel *lp);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct partition *pp;
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struct disklabel *lp;
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struct partition oldpartition;
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struct stat st;
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char *cp, *special;
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int ch, n, vflag;
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off_t mediasize;
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vflag = 0;
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while ((ch = getopt(argc, argv,
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"NRS:T:Ua:b:c:e:f:g:h:i:m:o:s:u:v:")) != -1)
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switch (ch) {
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case 'N':
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Nflag = 1;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'S':
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if ((sectorsize = atoi(optarg)) <= 0)
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errx(1, "%s: bad sector size", optarg);
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break;
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case 'T':
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disktype = optarg;
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break;
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case 'U':
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Uflag = 1;
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break;
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case 'a':
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if ((maxcontig = atoi(optarg)) <= 0)
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errx(1, "%s: bad maximum contiguous blocks",
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optarg);
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break;
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case 'b':
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if ((bsize = atoi(optarg)) < MINBSIZE)
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errx(1, "%s: bad block size", optarg);
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break;
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case 'c':
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if ((cpg = atoi(optarg)) <= 0)
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errx(1, "%s: bad cylinders/group", optarg);
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cpgflg++;
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break;
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case 'e':
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if ((maxbpg = atoi(optarg)) <= 0)
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errx(1, "%s: bad blocks per file in a cylinder group",
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optarg);
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break;
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case 'f':
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if ((fsize = atoi(optarg)) <= 0)
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errx(1, "%s: bad fragment size", optarg);
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break;
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case 'g':
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if ((avgfilesize = atoi(optarg)) <= 0)
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errx(1, "%s: bad average file size", optarg);
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break;
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case 'h':
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if ((avgfilesperdir = atoi(optarg)) <= 0)
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errx(1, "%s: bad average files per dir", optarg);
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break;
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case 'i':
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if ((density = atoi(optarg)) <= 0)
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errx(1, "%s: bad bytes per inode", optarg);
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break;
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case 'm':
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if ((minfree = atoi(optarg)) < 0 || minfree > 99)
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errx(1, "%s: bad free space %%", optarg);
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break;
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case 'o':
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if (strcmp(optarg, "space") == 0)
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opt = FS_OPTSPACE;
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else if (strcmp(optarg, "time") == 0)
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opt = FS_OPTTIME;
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else
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errx(1,
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"%s: unknown optimization preference: use `space' or `time'",
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optarg);
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break;
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case 's':
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if ((fssize = atoi(optarg)) <= 0)
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errx(1, "%s: bad file system size", optarg);
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break;
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case 'u':
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t_or_u_flag++;
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if ((n = atoi(optarg)) < 0)
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errx(1, "%s: bad sectors/track", optarg);
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secpercyl = n;
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break;
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case 'v':
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vflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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special = argv[0];
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cp = strrchr(special, '/');
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if (cp == 0) {
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/*
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* No path prefix; try prefixing _PATH_DEV.
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*/
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snprintf(device, sizeof(device), "%s%s", _PATH_DEV, special);
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special = device;
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}
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fso = open(special, Nflag ? O_RDONLY : O_RDWR);
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if (fso < 0)
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err(1, "%s", special);
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if (fstat(fso, &st) < 0)
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err(1, "%s", special);
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if ((st.st_mode & S_IFMT) != S_IFCHR)
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errx(1, "%s: not a character-special device", special);
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if (sectorsize == 0)
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ioctl(fso, DIOCGSECTORSIZE, §orsize);
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if (sectorsize && !ioctl(fso, DIOCGMEDIASIZE, &mediasize)) {
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if (fssize == 0)
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fssize = mediasize / sectorsize;
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else if (fssize > mediasize / sectorsize)
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errx(1, "%s: maximum filesystem size is %u",
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special, (u_int)(mediasize / sectorsize));
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}
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pp = NULL;
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lp = getdisklabel(special);
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if (lp != NULL) {
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cp = strchr(special, '\0');
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cp--;
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if (!vflag && (*cp < 'a' || *cp > 'h') && !isdigit(*cp))
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errx(1, "%s: can't figure out file system partition",
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special);
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if (vflag || isdigit(*cp))
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pp = &lp->d_partitions[0];
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else
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pp = &lp->d_partitions[*cp - 'a'];
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oldpartition = *pp;
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if (pp->p_size == 0)
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errx(1, "%s: `%c' partition is unavailable",
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special, *cp);
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if (pp->p_fstype == FS_BOOT)
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errx(1, "%s: `%c' partition overlaps boot program",
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special, *cp);
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if (fssize == 0)
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fssize = pp->p_size;
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if (fssize > pp->p_size)
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errx(1,
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"%s: maximum file system size %d", special, pp->p_size);
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if (secpercyl == 0)
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secpercyl = lp->d_nsectors;
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if (sectorsize == 0)
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sectorsize = lp->d_secsize;
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if (fsize == 0)
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fsize = pp->p_fsize;
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if (bsize == 0)
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bsize = pp->p_frag * pp->p_fsize;
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}
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if (sectorsize <= 0)
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errx(1, "%s: no default sector size", special);
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if (fsize <= 0)
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fsize = MAX(DFL_FRAGSIZE, sectorsize);
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if (bsize <= 0)
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bsize = MIN(DFL_BLKSIZE, 8 * fsize);
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if (secpercyl <= 0)
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errx(1, "%s: no default #sectors/track", special);
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/*
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* Maxcontig sets the default for the maximum number of blocks
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* that may be allocated sequentially. With filesystem clustering
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* it is possible to allocate contiguous blocks up to the maximum
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* transfer size permitted by the controller or buffering.
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*/
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if (maxcontig == 0)
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maxcontig = MAX(1, MAXPHYS / bsize - 1);
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if (density == 0)
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density = NFPI * fsize;
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if (minfree < MINFREE && opt != FS_OPTSPACE) {
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fprintf(stderr, "Warning: changing optimization to space ");
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fprintf(stderr, "because minfree is less than %d%%\n", MINFREE);
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opt = FS_OPTSPACE;
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}
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/*
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* Only complain if -t or -u have been specified; the default
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* case (4096 sectors per cylinder) is intended to disagree
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* with the disklabel.
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*/
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if (t_or_u_flag && lp != NULL && secpercyl != lp->d_secpercyl)
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fprintf(stderr, "%s (%d) %s (%lu)\n",
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"Warning: calculated sectors per cylinder", secpercyl,
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"disagrees with disk label", (u_long)lp->d_secpercyl);
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if (maxbpg == 0)
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maxbpg = MAXBLKPG(bsize);
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realsectorsize = sectorsize;
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if (sectorsize != DEV_BSIZE) { /* XXX */
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int secperblk = sectorsize / DEV_BSIZE;
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sectorsize = DEV_BSIZE;
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secpercyl *= secperblk;
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fssize *= secperblk;
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if (pp != NULL);
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pp->p_size *= secperblk;
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}
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mkfs(pp, special);
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if (!unlabeled) {
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if (realsectorsize != DEV_BSIZE)
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pp->p_size /= realsectorsize /DEV_BSIZE;
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if (!Nflag && bcmp(pp, &oldpartition, sizeof(oldpartition)))
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rewritelabel(special, lp);
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}
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close(fso);
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exit(0);
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}
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const char lmsg[] = "%s: can't read disk label; disk type must be specified";
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struct disklabel *
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getdisklabel(char *s)
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{
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static struct disklabel lab;
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struct disklabel *lp;
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if (!ioctl(fso, DIOCGDINFO, (char *)&lab))
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return (&lab);
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unlabeled++;
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if (disktype) {
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lp = getdiskbyname(disktype);
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if (lp != NULL)
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return (lp);
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}
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return (NULL);
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}
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void
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rewritelabel(char *s, struct disklabel *lp)
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{
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if (unlabeled)
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return;
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lp->d_checksum = 0;
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lp->d_checksum = dkcksum(lp);
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if (ioctl(fso, DIOCWDINFO, (char *)lp) < 0) {
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warn("ioctl (WDINFO)");
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errx(1, "%s: can't rewrite disk label", s);
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}
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}
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static void
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usage()
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{
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fprintf(stderr,
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"usage: %s [ -fsoptions ] special-device%s\n",
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getprogname(),
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" [device-type]");
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fprintf(stderr, "where fsoptions are:\n");
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fprintf(stderr,
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"\t-N do not create file system, just print out parameters\n");
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fprintf(stderr, "\t-R regression test, supress random factors\n");
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fprintf(stderr, "\t-S sector size\n");
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fprintf(stderr, "\t-T disktype\n");
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fprintf(stderr, "\t-U enable soft updates\n");
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fprintf(stderr, "\t-a maximum contiguous blocks\n");
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fprintf(stderr, "\t-b block size\n");
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fprintf(stderr, "\t-c cylinders/group\n");
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fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
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fprintf(stderr, "\t-f frag size\n");
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fprintf(stderr, "\t-g average file size\n");
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fprintf(stderr, "\t-h average files per directory\n");
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fprintf(stderr, "\t-i number of bytes per inode\n");
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fprintf(stderr, "\t-m minimum free space %%\n");
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fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
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fprintf(stderr, "\t-s file system size (sectors)\n");
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fprintf(stderr, "\t-u sectors/cylinder\n");
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fprintf(stderr,
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"\t-v do not attempt to determine partition name from device name\n");
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exit(1);
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}
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