newfs.c revision 1.6 
1/*	$NetBSD: newfs.c,v 1.6 2000/12/05 19:51:15 perseant Exp $	*/
2
3/*-
4 * Copyright (c) 1989, 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#ifndef lint
38__COPYRIGHT("@(#) Copyright (c) 1989, 1992, 1993\n\
39	The Regents of the University of California.  All rights reserved.\n");
40#endif /* not lint */
41
42#ifndef lint
43#if 0
44static char sccsid[] = "@(#)newfs.c	8.5 (Berkeley) 5/24/95";
45#else
46__RCSID("$NetBSD: newfs.c,v 1.6 2000/12/05 19:51:15 perseant Exp $");
47#endif
48#endif /* not lint */
49
50/*
51 * newfs: friendly front end to mkfs
52 */
53#include <sys/param.h>
54#include <sys/ucred.h>
55#include <sys/stat.h>
56#include <sys/ioctl.h>
57#include <sys/disklabel.h>
58#include <sys/file.h>
59#include <sys/mount.h>
60#include <sys/sysctl.h>
61#include <sys/time.h>
62
63#include <ufs/ufs/dir.h>
64#include <ufs/ufs/dinode.h>
65#include <ufs/lfs/lfs.h>
66
67#include <disktab.h>
68#include <errno.h>
69#include <unistd.h>
70#include <stdio.h>
71#include <stdlib.h>
72#include <ctype.h>
73#include <string.h>
74#include <paths.h>
75#include <util.h>
76#include "config.h"
77#include "extern.h"
78
79#define	COMPAT			/* allow non-labeled disks */
80
81int	Nflag;			/* run without writing file system */
82int	fssize;			/* file system size */
83int	sectorsize;		/* bytes/sector */
84int	fsize = 0;		/* fragment size */
85int	bsize = 0;		/* block size */
86int	minfree = MINFREE;	/* free space threshold */
87int     minfreeseg = 0;         /* free segments reserved for the cleaner */
88int	bbsize = BBSIZE;	/* boot block size */
89int	sbsize = SBSIZE;	/* superblock size */
90u_long	memleft;		/* virtual memory available */
91caddr_t	membase;		/* start address of memory based filesystem */
92#ifdef COMPAT
93char	*disktype;
94int	unlabeled;
95#endif
96
97char	device[MAXPATHLEN];
98char	*progname, *special;
99
100int main __P((int, char **));
101static struct disklabel *getdisklabel __P((char *, int));
102static struct disklabel *debug_readlabel __P((int));
103#ifdef notdef
104static void rewritelabel __P((char *, int, struct disklabel *));
105#endif
106static void usage __P((void));
107
108#define CHUNKSIZE 65536
109
110static size_t
111auto_segsize(int fd, off_t len, int version)
112{
113	off_t off, bw;
114	time_t start, finish;
115	char buf[CHUNKSIZE];
116	long seeks;
117	size_t final;
118	int i;
119
120	/* First, get sequential access bandwidth */
121	time(&start);
122	finish = start;
123	for (off = 0; finish - start < 10; off += CHUNKSIZE) {
124		if (pread(fd, buf, CHUNKSIZE, off) < 0)
125			break;
126		time(&finish);
127	}
128	/* Bandwidth = bytes / sec */
129	/* printf("%ld bytes in %ld seconds\n", (long)off, (long)(finish - start)); */
130	bw = off / (finish - start);
131
132	/* Second, seek time */
133	time(&start);
134	finish = start; /* structure copy */
135	for (seeks = 0; finish - start < 10; ) {
136		off = (((double)rand()) * len) / (off_t)RAND_MAX;
137		if (pread(fd, buf, dbtob(1), off) < 0)
138			break;
139		time(&finish);
140		++seeks;
141	}
142	/* printf("%ld seeks in %ld seconds\n", (long)seeks, (long)(finish - start)); */
143	/* Seek time in units/sec */
144	seeks /= (finish - start);
145	if (seeks == 0)
146		seeks = 1;
147
148	printf("bandwidth %ld B/s, seek time %ld ms (%ld seeks/s)\n",
149		(long)bw, 1000/seeks, seeks);
150	final = dbtob(btodb(4 * bw / seeks));
151
152	/* Version 1 filesystems have po2 segment sizes */
153	if (version == 1) {
154		for (i = 0; final; final >>= 1, i++)
155			;
156		final = 1 << i;
157	}
158
159	printf("using initial segment size %ld\n", (long)final);
160	return final;
161}
162
163int
164main(argc, argv)
165	int argc;
166	char *argv[];
167{
168	int ch;
169	struct partition *pp;
170	struct disklabel *lp;
171	struct stat st;
172	int debug, force, fsi, fso, segsize, maxpartitions;
173	char *cp, *opstring;
174
175	if ((progname = strrchr(*argv, '/')) != NULL)
176		++progname;
177	else
178		progname = *argv;
179
180	maxpartitions = getmaxpartitions();
181	if (maxpartitions > 26)
182		fatal("insane maxpartitions value %d", maxpartitions);
183
184	opstring = "AB:DFLNb:f:M:m:s:";
185
186	debug = force = segsize = 0;
187	while ((ch = getopt(argc, argv, opstring)) != -1)
188		switch(ch) {
189		case 'A':	/* Adaptively configure segment size */
190			segsize = -1;
191			break;
192		case 'B':	/* LFS segment size */
193			if ((segsize = atoi(optarg)) < LFS_MINSEGSIZE)
194				fatal("%s: bad segment size", optarg);
195			break;
196		case 'D':
197			debug = 1;
198			break;
199		case 'F':
200			force = 1;
201			break;
202		case 'L':	/* Compatibility only */
203			break;
204		case 'M':
205			minfreeseg = atoi(optarg);
206			break;
207		case 'N':
208			Nflag++;
209			break;
210#ifdef COMPAT
211		case 'T':
212			disktype = optarg;
213			break;
214#endif
215		case 'b':
216			if ((bsize = atoi(optarg)) < LFS_MINBLOCKSIZE)
217				fatal("%s: bad block size", optarg);
218			break;
219		case 'f':
220			if ((fsize = atoi(optarg)) <= 0)
221				fatal("%s: bad frag size", optarg);
222			break;
223		case 'm':
224			if ((minfree = atoi(optarg)) < 0 || minfree > 99)
225				fatal("%s: bad free space %%\n", optarg);
226			break;
227		case 's':
228			if ((fssize = atoi(optarg)) <= 0)
229				fatal("%s: bad file system size", optarg);
230			break;
231		case '?':
232		default:
233			usage();
234		}
235	argc -= optind;
236	argv += optind;
237
238	if (argc != 2 && argc != 1)
239		usage();
240
241	/*
242	 * If the -N flag isn't specified, open the output file.  If no path
243	 * prefix, try /dev/r%s and then /dev/%s.
244	 */
245	special = argv[0];
246	if (strchr(special, '/') == NULL) {
247		(void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV,
248		    special);
249		if (stat(device, &st) == -1)
250			(void)snprintf(device, sizeof(device), "%s%s",
251			    _PATH_DEV, special);
252		special = device;
253	}
254	if (!Nflag) {
255		fso = open(special,
256		    (debug ? O_CREAT : 0) | O_WRONLY, DEFFILEMODE);
257		if (fso < 0)
258			fatal("%s: %s", special, strerror(errno));
259	} else
260		fso = -1;
261
262	/* Open the input file. */
263	fsi = open(special, O_RDONLY);
264	if (fsi < 0)
265		fatal("%s: %s", special, strerror(errno));
266	if (fstat(fsi, &st) < 0)
267		fatal("%s: %s", special, strerror(errno));
268
269
270	if (!debug && !S_ISCHR(st.st_mode))
271		(void)printf("%s: %s: not a character-special device\n",
272		    progname, special);
273	cp = strchr(argv[0], '\0') - 1;
274	if (!debug
275	    && (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1))
276	    && !isdigit(*cp))))
277		fatal("%s: can't figure out file system partition", argv[0]);
278
279#ifdef COMPAT
280	if (disktype == NULL)
281		disktype = argv[1];
282#endif
283	if (debug)
284		lp = debug_readlabel(fsi);
285	else
286		lp = getdisklabel(special, fsi);
287
288	if (isdigit(*cp))
289		pp = &lp->d_partitions[0];
290	else
291		pp = &lp->d_partitions[*cp - 'a'];
292	if (pp->p_size == 0)
293		fatal("%s: `%c' partition is unavailable", argv[0], *cp);
294
295	/* If force, make the partition look like an LFS */
296	if(force) {
297		pp->p_fstype = FS_BSDLFS;
298		/* 0 means to use defaults */
299		pp->p_fsize  = 0;
300		pp->p_frag   = 0;
301		pp->p_sgs    = 0;
302	}
303
304	/* Try autoconfiguring segment size, if asked to */
305	if (segsize == -1)
306		segsize = auto_segsize(fsi, dbtob(pp->p_size), 1);
307
308	/* If we're making a LFS, we break out here */
309	exit(make_lfs(fso, lp, pp, minfree, bsize, fsize, segsize,
310		      minfreeseg));
311}
312
313#ifdef COMPAT
314char lmsg[] = "%s: can't read disk label; disk type must be specified";
315#else
316char lmsg[] = "%s: can't read disk label";
317#endif
318
319static struct disklabel *
320getdisklabel(s, fd)
321	char *s;
322	int fd;
323{
324	static struct disklabel lab;
325
326	if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
327#ifdef COMPAT
328		if (disktype) {
329			struct disklabel *lp;
330
331			unlabeled++;
332			lp = getdiskbyname(disktype);
333			if (lp == NULL)
334				fatal("%s: unknown disk type", disktype);
335			return (lp);
336		}
337#endif
338		(void)fprintf(stderr,
339		    "%s: ioctl (GDINFO): %s\n", progname, strerror(errno));
340		fatal(lmsg, s);
341	}
342	return (&lab);
343}
344
345
346static struct disklabel *
347debug_readlabel(fd)
348	int fd;
349{
350	static struct disklabel lab;
351	int n;
352
353	if ((n = read(fd, &lab, sizeof(struct disklabel))) < 0)
354		fatal("unable to read disk label: %s", strerror(errno));
355	else if (n < sizeof(struct disklabel))
356		fatal("short read of disklabel: %d of %ld bytes", n,
357			(u_long) sizeof(struct disklabel));
358	return(&lab);
359}
360
361#ifdef notdef
362static void
363rewritelabel(s, fd, lp)
364	char *s;
365	int fd;
366	struct disklabel *lp;
367{
368#ifdef COMPAT
369	if (unlabeled)
370		return;
371#endif
372	lp->d_checksum = 0;
373	lp->d_checksum = dkcksum(lp);
374	if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) {
375		(void)fprintf(stderr,
376		    "%s: ioctl (WDINFO): %s\n", progname, strerror(errno));
377		fatal("%s: can't rewrite disk label", s);
378	}
379#if __vax__
380	if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
381		int i;
382		int cfd;
383		daddr_t alt;
384		char specname[64];
385		char blk[1024];
386		char *cp;
387
388		/*
389		 * Make name for 'c' partition.
390		 */
391		strcpy(specname, s);
392		cp = specname + strlen(specname) - 1;
393		if (!isdigit(*cp))
394			*cp = 'c';
395		cfd = open(specname, O_WRONLY);
396		if (cfd < 0)
397			fatal("%s: %s", specname, strerror(errno));
398		memset(blk, 0, sizeof(blk));
399		*(struct disklabel *)(blk + LABELOFFSET) = *lp;
400		alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
401		for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
402			if (lseek(cfd, (off_t)((alt + i) * lp->d_secsize),
403			    SEEK_SET) == -1)
404				fatal("lseek to badsector area: %s",
405				    strerror(errno));
406			if (write(cfd, blk, lp->d_secsize) < lp->d_secsize)
407				fprintf(stderr,
408				    "%s: alternate label %d write: %s\n",
409				    progname, i/2, strerror(errno));
410		}
411		close(cfd);
412	}
413#endif /* vax */
414}
415#endif /* notdef */
416
417void
418usage()
419{
420	fprintf(stderr, "usage: newfs_lfs [ -fsoptions ] special-device\n");
421	fprintf(stderr, "where fsoptions are:\n");
422	fprintf(stderr, "\t-A (autoconfigure segment size)\n");
423	fprintf(stderr, "\t-B segment size in bytes\n");
424	fprintf(stderr, "\t-D debug\n");
425	fprintf(stderr,
426	    "\t-N (do not create file system, just print out parameters)\n");
427	fprintf(stderr, "\t-b block size in bytes\n");
428	fprintf(stderr, "\t-f frag size in bytes\n");
429	fprintf(stderr, "\t-m minimum free space %%\n");
430	fprintf(stderr, "\t-s file system size in sectors\n");
431	exit(1);
432}
433