d2f46c9060
kern.geom.conftxt, which md disks don't show up in. If the magic and the checksum are right assume its a valid sunlabel, otherwise use the DIOC ioctls to get the disk parameters and whip up a label out of thin air. - Don't just silently create or correct invalid c partitions, warn about invalid ones in label proto files. - Split checksumming into a function since we do it a couple times. Also don't include the sl_cksum field in the checksum, which avoids needing to clear it first. This is makes sunlabel a suitable replacement for disklabel in make release.
583 lines
15 KiB
C
583 lines
15 KiB
C
/*-
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* Copyright (c) 2003 Jake Burkholder.
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* 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
|
|
* notice, this list of conditions and the following disclaimer.
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|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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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/*
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* Copyright (c) 1994, 1995 Gordon W. Ross
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* Copyright (c) 1994 Theo de Raadt
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* All rights reserved.
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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Symmetric Computer Systems.
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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
|
|
* 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
|
|
* 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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* This product includes software developed by Theo de Raadt.
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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
|
|
* 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
|
|
* 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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* from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/disk.h>
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#include <sys/ioctl.h>
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#include <sys/sun_disklabel.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <paths.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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#define _PATH_TMPFILE "/tmp/EdDk.XXXXXXXXXX"
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#define _PATH_BOOT "/boot/boot1"
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static int bflag;
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static int Bflag;
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static int eflag;
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static int nflag;
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static int rflag = 1;
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static int Rflag;
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static int wflag;
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static int check_label(struct sun_disklabel *sl);
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static void read_label(struct sun_disklabel *sl, const char *disk);
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static void write_label(struct sun_disklabel *sl, const char *disk,
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const char *bootpath);
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static int edit_label(struct sun_disklabel *sl, const char *disk,
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const char *bootpath);
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static int parse_label(struct sun_disklabel *sl, const char *file);
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static void print_label(struct sun_disklabel *sl, const char *disk, FILE *out);
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static uint16_t checksum(struct sun_disklabel *sl);
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static int parse_size(struct sun_disklabel *sl, int part, char *size);
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static int parse_offset(struct sun_disklabel *sl, int part, char *offset);
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static void usage(void);
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extern char *__progname;
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/*
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* Disk label editor for sun disklabels.
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*/
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int
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main(int ac, char **av)
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{
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struct sun_disklabel sl;
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const char *bootpath;
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const char *proto;
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const char *disk;
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int ch;
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bootpath = _PATH_BOOT;
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while ((ch = getopt(ac, av, "b:BenrRw")) != -1)
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switch (ch) {
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case 'b':
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bflag = 1;
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bootpath = optarg;
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break;
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case 'B':
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Bflag = 1;
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break;
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case 'e':
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eflag = 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 'r':
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rflag = 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 'w':
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wflag = 1;
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break;
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default:
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usage();
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break;
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}
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if (bflag && !Bflag)
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usage();
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if (nflag && !(Bflag || eflag || Rflag || wflag))
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usage();
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if (eflag && (Rflag || wflag))
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usage();
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ac -= optind;
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av += optind;
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if (ac == 0)
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usage();
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bzero(&sl, sizeof(sl));
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disk = av[0];
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if (wflag) {
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if (ac != 2 || strcmp(av[1], "auto") != 0)
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usage();
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read_label(&sl, disk);
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bzero(sl.sl_part, sizeof(sl.sl_part));
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sl.sl_part[2].sdkp_cyloffset = 0;
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sl.sl_part[2].sdkp_nsectors = sl.sl_ncylinders *
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sl.sl_ntracks * sl.sl_nsectors;
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write_label(&sl, disk, bootpath);
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} else if (eflag) {
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if (ac != 1)
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usage();
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read_label(&sl, disk);
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if (sl.sl_magic != SUN_DKMAGIC)
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errx(1, "%s%s has no sun disklabel", _PATH_DEV, disk);
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while (edit_label(&sl, disk, bootpath) != 0)
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;
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} else if (Rflag) {
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if (ac != 2)
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usage();
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proto = av[1];
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read_label(&sl, disk);
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if (parse_label(&sl, proto) != 0)
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errx(1, "%s: invalid label", proto);
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write_label(&sl, disk, bootpath);
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} else if (Bflag) {
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read_label(&sl, disk);
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if (sl.sl_magic != SUN_DKMAGIC)
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errx(1, "%s%s has no sun disklabel", _PATH_DEV, disk);
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write_label(&sl, disk, bootpath);
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} else {
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read_label(&sl, disk);
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if (sl.sl_magic != SUN_DKMAGIC)
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errx(1, "%s%s has no sun disklabel", _PATH_DEV, disk);
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print_label(&sl, disk, stdout);
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}
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return (0);
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}
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static int
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check_label(struct sun_disklabel *sl)
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{
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uint64_t nsectors;
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uint64_t ostart;
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uint64_t start;
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uint64_t oend;
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uint64_t end;
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int i;
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int j;
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nsectors = sl->sl_ncylinders * sl->sl_ntracks * sl->sl_nsectors;
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if (sl->sl_part[2].sdkp_cyloffset != 0 ||
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sl->sl_part[2].sdkp_nsectors != nsectors) {
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warnx("partition c is incorrect, must start at 0 and cover "
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"whole disk");
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return (1);
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}
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for (i = 0; i < 8; i++) {
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if (i == 2 || sl->sl_part[i].sdkp_nsectors == 0)
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continue;
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start = (uint64_t)sl->sl_part[i].sdkp_cyloffset *
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sl->sl_ntracks * sl->sl_nsectors;
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end = start + sl->sl_part[i].sdkp_nsectors;
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if (end > nsectors) {
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warnx("partition %c extends past end of disk",
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'a' + i);
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return (1);
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}
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for (j = 0; j < 8; j++) {
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if (j == 2 || j == i ||
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sl->sl_part[j].sdkp_nsectors == 0)
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continue;
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ostart = (uint64_t)sl->sl_part[j].sdkp_cyloffset *
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sl->sl_ntracks * sl->sl_nsectors;
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oend = ostart + sl->sl_part[j].sdkp_nsectors;
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if ((start <= ostart && end >= oend) ||
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(start > ostart && start < oend) ||
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(end > ostart && end < oend)) {
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warnx("partition %c overlaps partition %c",
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'a' + i, 'a' + j);
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return (1);
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}
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}
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}
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return (0);
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}
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static void
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read_label(struct sun_disklabel *sl, const char *disk)
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{
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char path[MAXPATHLEN];
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uint32_t sectorsize;
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uint32_t fwsectors;
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uint32_t fwheads;
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off_t mediasize;
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int fd;
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snprintf(path, sizeof(path), "%s%s", _PATH_DEV, disk);
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if ((fd = open(path, O_RDONLY)) < 0)
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err(1, "open %s", path);
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if (read(fd, sl, sizeof(*sl)) != sizeof(*sl))
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err(1, "read");
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if (sl->sl_magic != SUN_DKMAGIC || checksum(sl) != sl->sl_cksum) {
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bzero(sl, sizeof(*sl));
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if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) != 0)
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err(1, "%s: ioctl(DIOCGMEDIASIZE) failed", disk);
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if (ioctl(fd, DIOCGSECTORSIZE, §orsize) != 0)
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err(1, "%s: DIOCGSECTORSIZE failed", disk);
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if (ioctl(fd, DIOCGFWSECTORS, &fwsectors) != 0)
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fwsectors = 63;
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if (ioctl(fd, DIOCGFWHEADS, &fwheads) != 0) {
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if (mediasize <= 63 * 1024 * sectorsize)
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fwheads = 1;
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else if (mediasize <= 63 * 16 * 1024 * sectorsize)
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fwheads = 16;
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else
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fwheads = 255;
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}
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sl->sl_rpm = 3600;
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sl->sl_pcylinders = mediasize / (fwsectors * fwheads *
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sectorsize);
|
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sl->sl_sparespercyl = 0;
|
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sl->sl_interleave = 1;
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sl->sl_ncylinders = sl->sl_pcylinders - 2;
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sl->sl_acylinders = 2;
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sl->sl_nsectors = fwsectors;
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sl->sl_ntracks = fwheads;
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sl->sl_part[2].sdkp_cyloffset = 0;
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sl->sl_part[2].sdkp_nsectors = sl->sl_ncylinders *
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sl->sl_ntracks * sl->sl_nsectors;
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if (mediasize > 4999L * 1024L * 1024L) {
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|
sprintf(sl->sl_text,
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"FreeBSD%luG cyl %u alt %u hd %u sec %u",
|
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(mediasize + 512 * 1024 * 1024) /
|
|
(1024 * 1024 * 1024),
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sl->sl_ncylinders, sl->sl_acylinders,
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sl->sl_ntracks, sl->sl_nsectors);
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|
} else {
|
|
sprintf(sl->sl_text,
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"FreeBSD%luM cyl %u alt %u hd %u sec %u",
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(mediasize + 512 * 1024) / (1024 * 1024),
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sl->sl_ncylinders, sl->sl_acylinders,
|
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sl->sl_ntracks, sl->sl_nsectors);
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|
}
|
|
}
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|
close(fd);
|
|
}
|
|
|
|
static void
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write_label(struct sun_disklabel *sl, const char *disk, const char *bootpath)
|
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{
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char path[MAXPATHLEN];
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char boot[16 * 512];
|
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off_t off;
|
|
int bfd;
|
|
int fd;
|
|
int i;
|
|
|
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sl->sl_magic = SUN_DKMAGIC;
|
|
sl->sl_cksum = checksum(sl);
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|
|
|
if (check_label(sl) != 0)
|
|
errx(1, "invalid label");
|
|
|
|
if (nflag) {
|
|
print_label(sl, disk, stdout);
|
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} else if (rflag) {
|
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snprintf(path, sizeof(path), "%s%s", _PATH_DEV, disk);
|
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if ((fd = open(path, O_RDWR)) < 0)
|
|
err(1, "open %s", path);
|
|
if (Bflag) {
|
|
if ((bfd = open(bootpath, O_RDONLY)) < 0)
|
|
err(1, "open %s", bootpath);
|
|
if (read(bfd, boot, sizeof(boot)) != sizeof(boot))
|
|
err(1, "read");
|
|
close(bfd);
|
|
for (i = 0; i < 8; i++) {
|
|
if (sl->sl_part[i].sdkp_nsectors == 0)
|
|
continue;
|
|
off = sl->sl_part[i].sdkp_cyloffset *
|
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sl->sl_ntracks * sl->sl_nsectors * 512;
|
|
if (lseek(fd, off, SEEK_SET) < 0)
|
|
err(1, "lseek");
|
|
if (write(fd, boot, sizeof(boot)) !=
|
|
sizeof(boot))
|
|
err(1, "write");
|
|
}
|
|
}
|
|
if (lseek(fd, 0, SEEK_SET) < 0)
|
|
err(1, "lseek");
|
|
if (write(fd, sl, sizeof(*sl)) != sizeof(*sl))
|
|
err(1, "write");
|
|
close(fd);
|
|
} else
|
|
err(1, "implement!");
|
|
}
|
|
|
|
static int
|
|
edit_label(struct sun_disklabel *sl, const char *disk, const char *bootpath)
|
|
{
|
|
char tmpfil[] = _PATH_TMPFILE;
|
|
const char *editor;
|
|
int status;
|
|
FILE *fp;
|
|
pid_t pid;
|
|
pid_t r;
|
|
int fd;
|
|
int c;
|
|
|
|
if ((fd = mkstemp(tmpfil)) < 0)
|
|
err(1, "mkstemp");
|
|
if ((fp = fdopen(fd, "w")) == NULL)
|
|
err(1, "fdopen");
|
|
print_label(sl, disk, fp);
|
|
fflush(fp);
|
|
if ((pid = fork()) < 0)
|
|
err(1, "fork");
|
|
if (pid == 0) {
|
|
if ((editor = getenv("EDITOR")) == NULL)
|
|
editor = _PATH_VI;
|
|
execlp(editor, editor, tmpfil, NULL);
|
|
err(1, "execlp %s", editor);
|
|
}
|
|
status = 0;
|
|
while ((r = wait(&status)) > 0 && r != pid)
|
|
;
|
|
if (WIFEXITED(status)) {
|
|
if (parse_label(sl, tmpfil) == 0) {
|
|
fclose(fp);
|
|
unlink(tmpfil);
|
|
write_label(sl, disk, bootpath);
|
|
return (0);
|
|
}
|
|
printf("re-edit the label? [y]: ");
|
|
fflush(stdout);
|
|
c = getchar();
|
|
if (c != EOF && c != '\n')
|
|
while (getchar() != '\n')
|
|
;
|
|
if (c == 'n') {
|
|
fclose(fp);
|
|
unlink(tmpfil);
|
|
return (0);
|
|
}
|
|
}
|
|
fclose(fp);
|
|
unlink(tmpfil);
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
parse_label(struct sun_disklabel *sl, const char *file)
|
|
{
|
|
char offset[32];
|
|
char size[32];
|
|
char buf[128];
|
|
uint8_t part;
|
|
FILE *fp;
|
|
int line;
|
|
|
|
line = 0;
|
|
if ((fp = fopen(file, "r")) == NULL)
|
|
err(1, "fopen");
|
|
bzero(sl->sl_part, sizeof(sl->sl_part));
|
|
while (fgets(buf, sizeof(buf), fp) != NULL) {
|
|
if (buf[0] != ' ' || buf[1] != ' ')
|
|
continue;
|
|
if (sscanf(buf, " %c: %s %s\n", &part, size, offset) != 3 ||
|
|
parse_size(sl, part - 'a', size) ||
|
|
parse_offset(sl, part - 'a', offset)) {
|
|
warnx("%s: syntex error on line %d",
|
|
file, line);
|
|
fclose(fp);
|
|
return (1);
|
|
}
|
|
line++;
|
|
}
|
|
fclose(fp);
|
|
return (check_label(sl));
|
|
}
|
|
|
|
static int
|
|
parse_size(struct sun_disklabel *sl, int part, char *size)
|
|
{
|
|
uintmax_t nsectors;
|
|
uintmax_t total;
|
|
uintmax_t n;
|
|
char *p;
|
|
int i;
|
|
|
|
nsectors = 0;
|
|
n = strtoumax(size, &p, 10);
|
|
if (*p != '\0') {
|
|
if (strcmp(size, "*") == 0) {
|
|
total = sl->sl_ncylinders * sl->sl_ntracks *
|
|
sl->sl_nsectors;
|
|
for (i = 0; i < part; i++) {
|
|
if (i == 2)
|
|
continue;
|
|
nsectors += sl->sl_part[i].sdkp_nsectors;
|
|
}
|
|
n = total - nsectors;
|
|
} else if (p[1] == '\0' && (p[0] == 'K' || p[0] == 'k')) {
|
|
n = roundup((n * 1024) / 512,
|
|
sl->sl_ntracks * sl->sl_nsectors);
|
|
} else if (p[1] == '\0' && (p[0] == 'M' || p[0] == 'm')) {
|
|
n = roundup((n * 1024 * 1024) / 512,
|
|
sl->sl_ntracks * sl->sl_nsectors);
|
|
} else if (p[1] == '\0' && (p[0] == 'G' || p[0] == 'g')) {
|
|
n = roundup((n * 1024 * 1024 * 1024) / 512,
|
|
sl->sl_ntracks * sl->sl_nsectors);
|
|
} else
|
|
return (-1);
|
|
}
|
|
sl->sl_part[part].sdkp_nsectors = n;
|
|
return (0);
|
|
}
|
|
|
|
static uint16_t
|
|
checksum(struct sun_disklabel *sl)
|
|
{
|
|
uint16_t cksum;
|
|
uint16_t *sp1;
|
|
uint16_t *sp2;
|
|
|
|
sp1 = (u_short *)sl;
|
|
sp2 = (u_short *)(sl + 1) - 1;
|
|
cksum = 0;
|
|
while (sp1 < sp2)
|
|
cksum ^= *sp1++;
|
|
return (cksum);
|
|
}
|
|
|
|
static int
|
|
parse_offset(struct sun_disklabel *sl, int part, char *offset)
|
|
{
|
|
uintmax_t nsectors;
|
|
uintmax_t n;
|
|
char *p;
|
|
int i;
|
|
|
|
nsectors = 0;
|
|
n = strtoumax(offset, &p, 10);
|
|
if (*p != '\0') {
|
|
if (strcmp(offset, "*") == 0) {
|
|
for (i = 0; i < part; i++) {
|
|
if (i == 2)
|
|
continue;
|
|
nsectors += sl->sl_part[i].sdkp_nsectors;
|
|
}
|
|
n = nsectors / (sl->sl_nsectors * sl->sl_ntracks);
|
|
} else
|
|
return (-1);
|
|
}
|
|
sl->sl_part[part].sdkp_cyloffset = n;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
print_label(struct sun_disklabel *sl, const char *disk, FILE *out)
|
|
{
|
|
int i;
|
|
|
|
fprintf(out,
|
|
"# /dev/%s:\n"
|
|
"text: %s\n"
|
|
"bytes/sectors: 512\n"
|
|
"sectors/cylinder: %d\n"
|
|
"sectors/unit: %d\n"
|
|
"\n"
|
|
"8 partitions:\n"
|
|
"#\n"
|
|
"# Size is in sectors, use %%dK, %%dM or %%dG to specify in kilobytes,\n"
|
|
"# megabytes or gigabytes respectively, or '*' to specify rest of disk.\n"
|
|
"# Offset is in cylinders, use '*' to calculate offsets automatically.\n"
|
|
"#\n"
|
|
"# size offset\n"
|
|
"# ---------- ----------\n",
|
|
disk,
|
|
sl->sl_text,
|
|
sl->sl_nsectors * sl->sl_ntracks,
|
|
sl->sl_nsectors * sl->sl_ntracks * sl->sl_ncylinders);
|
|
for (i = 0; i < 8; i++) {
|
|
if (sl->sl_part[i].sdkp_nsectors == 0)
|
|
continue;
|
|
fprintf(out, " %c: %10u %10u\n",
|
|
'a' + i,
|
|
sl->sl_part[i].sdkp_nsectors,
|
|
sl->sl_part[i].sdkp_cyloffset);
|
|
}
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "usage:"
|
|
"\t%s [-r] disk\n"
|
|
"\t\t(to read label)\n"
|
|
"\t%s -B [-b boot1] [-n] disk\n"
|
|
"\t\t(to install boot program only)\n"
|
|
"\t%s -R [-B [-b boot1]] [-r] [-n] disk protofile\n"
|
|
"\t\t(to restore label)\n"
|
|
"\t%s -e [-B [-b boot1]] [-r] [-n] disk\n"
|
|
"\t\t(to edit label)\n"
|
|
"\t%s -w [-B [-b boot1]] [-r] [-n] disk type\n"
|
|
"\t\t(to write default label)\n",
|
|
__progname,
|
|
__progname,
|
|
__progname,
|
|
__progname,
|
|
__progname);
|
|
exit(1);
|
|
}
|