35956d32df
Add a new option to newfs(8), -r, to specify reserved space at the end of the device. It can be useful, e.g., when the device is to become a member of a gmirror array later w/o losing the file system on it. Document the new option in the manpage. While I'm here, improve error handling for -s option, which is syntactically similar to -r; and document the fact that -s0 selects the default fs size explicitly, which can be useful, e.g., in a menu-based wrapper around newfs(8) requiring some value be entered for the fs size. Also fix a small typo in the help line for -s (missing space). Idea and initial implementation by: marck Discussed on: -fs Critical review by: bde Tested with: cmp(1)
468 lines
14 KiB
C
468 lines
14 KiB
C
/*
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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) 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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* 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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#if 0
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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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static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <inttypes.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 MAXBLKSPERCG blocks. The actual
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* number used depends upon how much information can be stored
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* in a cylinder group map which must fit in a single file system
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* block. The default is to use as many as possible blocks per group.
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*/
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#define MAXBLKSPERCG 0x7fffffff /* desired fs_fpg ("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(ufs2_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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int Lflag; /* add a volume label */
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int Nflag; /* run without writing file system */
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int Oflag = 2; /* file system format (1 => UFS1, 2 => UFS2) */
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int Rflag; /* regression test */
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int Uflag; /* enable soft updates for file system */
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int Eflag = 0; /* exit in middle of newfs for testing */
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int Jflag; /* enable gjournal for file system */
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int lflag; /* enable multilabel for file system */
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int nflag; /* do not create .snap directory */
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intmax_t fssize; /* file system size */
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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 maxbsize = 0; /* maximum clustering */
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int maxblkspercg = MAXBLKSPERCG; /* maximum blocks per cylinder group */
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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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u_char *volumelabel = NULL; /* volume label for filesystem */
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struct uufsd disk; /* libufs disk structure */
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static char device[MAXPATHLEN];
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static char *disktype;
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static int unlabeled;
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static void getfssize(intmax_t *, const char *p, intmax_t, intmax_t);
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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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intmax_t reserved;
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int ch, i;
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off_t mediasize;
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reserved = 0;
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while ((ch = getopt(argc, argv,
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"EJL:NO:RS:T:Ua:b:c:d:e:f:g:h:i:lm:no:r:s:")) != -1)
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switch (ch) {
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case 'E':
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Eflag++;
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break;
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case 'J':
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Jflag = 1;
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break;
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case 'L':
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volumelabel = optarg;
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i = -1;
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while (isalnum(volumelabel[++i]));
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if (volumelabel[i] != '\0') {
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errx(1, "bad volume label. Valid characters are alphanumerics.");
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}
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if (strlen(volumelabel) >= MAXVOLLEN) {
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errx(1, "bad volume label. Length is longer than %d.",
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MAXVOLLEN);
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}
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Lflag = 1;
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break;
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case 'N':
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Nflag = 1;
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break;
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case 'O':
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if ((Oflag = atoi(optarg)) < 1 || Oflag > 2)
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errx(1, "%s: bad file system format value",
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optarg);
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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: block size too small, min is %d",
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optarg, MINBSIZE);
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if (bsize > MAXBSIZE)
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errx(1, "%s: block size too large, max is %d",
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optarg, MAXBSIZE);
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break;
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case 'c':
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if ((maxblkspercg = atoi(optarg)) <= 0)
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errx(1, "%s: bad blocks per cylinder group",
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optarg);
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break;
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case 'd':
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if ((maxbsize = atoi(optarg)) < MINBSIZE)
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errx(1, "%s: bad extent block size", optarg);
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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 'l':
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lflag = 1;
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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 'n':
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nflag = 1;
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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 'r':
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errno = 0;
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reserved = strtoimax(optarg, &cp, 0);
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if (errno != 0 || cp == optarg ||
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*cp != '\0' || reserved < 0)
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errx(1, "%s: bad reserved size", optarg);
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break;
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case 's':
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errno = 0;
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fssize = strtoimax(optarg, &cp, 0);
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if (errno != 0 || cp == optarg ||
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*cp != '\0' || fssize < 0)
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errx(1, "%s: bad file system size", optarg);
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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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if (ufs_disk_fillout_blank(&disk, special) == -1 ||
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(!Nflag && ufs_disk_write(&disk) == -1)) {
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if (disk.d_error != NULL)
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errx(1, "%s: %s", special, disk.d_error);
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else
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err(1, "%s", special);
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}
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if (fstat(disk.d_fd, &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(disk.d_fd, DIOCGSECTORSIZE, §orsize);
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if (sectorsize && !ioctl(disk.d_fd, DIOCGMEDIASIZE, &mediasize))
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getfssize(&fssize, special, mediasize / sectorsize, reserved);
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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 ((*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 (isdigit(*cp))
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pp = &lp->d_partitions[RAW_PART];
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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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getfssize(&fssize, special, pp->p_size, reserved);
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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 (maxbsize == 0)
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maxbsize = bsize;
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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 file system 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);
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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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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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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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ufs_disk_close(&disk);
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exit(0);
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}
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void
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getfssize(intmax_t *fsz, const char *s, intmax_t disksize, intmax_t reserved)
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{
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intmax_t available;
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available = disksize - reserved;
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if (available <= 0)
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errx(1, "%s: reserved not less than device size %jd",
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s, disksize);
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if (*fsz == 0)
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*fsz = available;
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else if (*fsz > available)
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errx(1, "%s: maximum file system size is %jd",
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s, available);
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}
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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(disk.d_fd, 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(disk.d_fd, DIOCWDINFO, (char *)lp) < 0)
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warn("ioctl (WDINFO): %s: can't rewrite disk label", s);
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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, "\t-J Enable journaling via gjournal\n");
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fprintf(stderr, "\t-L volume label to add to superblock\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-O file system format: 1 => UFS1, 2 => UFS2\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 blocks per cylinders group\n");
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fprintf(stderr, "\t-d maximum extent size\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-l enable multilabel MAC\n");
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fprintf(stderr, "\t-n do not create .snap directory\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-r reserved sectors at the end of device\n");
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fprintf(stderr, "\t-s file system size (sectors)\n");
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exit(1);
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}
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