2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Symmetric Computer Systems.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)disklabel.c 1.2 (Symmetric) 11/28/85
38 * @(#)disklabel.c 8.2 (Berkeley) 1/7/94
39 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $
40 * $DragonFly: src/sbin/disklabel/disklabel.c,v 1.21 2007/06/18 05:13:38 dillon Exp $
43 #include <sys/param.h>
48 #include <sys/disklabel32.h>
49 #include <sys/disklabel64.h>
50 #include <sys/diskslice.h>
51 #include <sys/diskmbr.h>
52 #include <sys/dtype.h>
53 #include <sys/sysctl.h>
56 #include <vfs/ufs/dinode.h>
57 #include <vfs/ufs/fs.h>
69 #include "pathnames.h"
72 * Disklabel: read and write disklabels.
73 * The label is usually placed on one of the first sectors of the disk.
74 * Many machines also place a bootstrap in the same area,
75 * in which case the label is embedded in the bootstrap.
76 * The bootstrap source must leave space at the proper offset
77 * for the label on such machines.
81 #define BBSIZE 8192 /* size of boot area, with label */
84 /* FIX! These are too low, but are traditional */
85 #define DEFAULT_NEWFS_BLOCK 8192U
86 #define DEFAULT_NEWFS_FRAG 1024U
87 #define DEFAULT_NEWFS_CPG 16U
89 #define BIG_NEWFS_BLOCK 16384U
90 #define BIG_NEWFS_FRAG 2048U
91 #define BIG_NEWFS_CPG 64U
95 void makelabel(const char *, const char *, struct disklabel32 *);
96 int writelabel(int, const char *, struct disklabel32 *);
97 void l_perror(const char *);
98 struct disklabel32 *readlabel(int);
99 struct disklabel32 *makebootarea(char *, struct disklabel32 *, int);
100 void display(FILE *, const struct disklabel32 *);
101 int edit(struct disklabel32 *, int);
105 int getasciilabel(FILE *, struct disklabel32 *);
106 int getasciipartspec(char *, struct disklabel32 *, int, int);
107 int checklabel(struct disklabel32 *);
108 void setbootflag(struct disklabel32 *);
109 void Warning(const char *, ...) __printflike(1, 2);
111 int checkoldboot(int, const char *);
112 const char *fixlabel(int, struct disklabel32 *, int);
113 struct disklabel32 *getvirginlabel(void);
114 struct disklabel32 *getdisklabelfromdisktab(const char *name);
116 #define DEFEDITOR _PATH_VI
117 #define streq(a,b) (strcmp(a,b) == 0)
121 char tmpfil[] = PATH_TMPFILE;
123 char namebuf[BBSIZE], *np = namebuf;
124 struct disklabel32 lab;
125 char bootarea[BBSIZE];
127 #define MAX_PART ('z')
128 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
129 char part_size_type[MAX_NUM_PARTS];
130 char part_offset_type[MAX_NUM_PARTS];
131 int part_set[MAX_NUM_PARTS];
134 int installboot; /* non-zero if we should install a boot program */
135 char *bootbuf; /* pointer to buffer with remainder of boot prog */
136 int bootsize; /* size of remaining boot program */
137 char *xxboot; /* primary boot */
138 char *bootxx; /* secondary boot */
139 char boot0[MAXPATHLEN];
140 char boot1[MAXPATHLEN];
144 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT
148 int disable_write; /* set to disable writing to disk label */
150 u_int32_t slice_start_lba;
154 #define OPTIONS "BNRWb:def:nrs:w"
156 #define OPTIONS "BNRWb:ef:nrs:w"
160 main(int argc, char *argv[])
162 struct disklabel32 *lp;
164 int ch, f = 0, flag, error = 0;
167 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
179 slice_start_lba = strtoul(optarg, NULL, 0);
247 if (dkname[0] != '/') {
248 sprintf(np, "%s%s", _PATH_DEV, dkname);
250 np += strlen(specname) + 1;
254 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
255 if (f < 0 && errno == ENOENT && dkname[0] != '/') {
256 sprintf(specname, "%s%s", _PATH_DEV, dkname);
257 np = namebuf + strlen(specname) + 1;
258 f = open(specname, op == READ ? O_RDONLY : O_RDWR);
261 err(4, "%s", specname);
277 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
278 err(4, "ioctl DIOCWLABEL");
286 error = checklabel(lp);
287 if (checkoldboot(f, NULL))
288 warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel");
293 if (installboot && argc == 3) {
294 makelabel(argv[2], 0, &lab);
298 * We only called makelabel() for its side effect
299 * of setting the bootstrap file names. Discard
300 * all changes to `lab' so that all values in the
301 * final label come from the ASCII label.
303 bzero((char *)&lab, sizeof(lab));
308 if (!(t = fopen(argv[1], "r")))
309 err(4, "%s", argv[1]);
310 if (!getasciilabel(t, &lab))
312 lp = makebootarea(bootarea, &lab, f);
314 error = writelabel(f, bootarea, lp);
324 makelabel(argv[1], name, &lab);
325 lp = makebootarea(bootarea, &lab, f);
327 if (checklabel(lp) == 0)
328 error = writelabel(f, bootarea, lp);
333 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0)
334 err(4, "ioctl DIOCWLABEL");
340 struct disklabel32 tlab;
345 makelabel(argv[1], 0, &lab);
346 lp = makebootarea(bootarea, &lab, f);
348 if (checklabel(lp) == 0)
349 error = writelabel(f, bootarea, lp);
358 * Construct a prototype disklabel from /etc/disktab. As a side
359 * effect, set the names of the primary and secondary boot files
363 makelabel(const char *type, const char *name, struct disklabel32 *lp)
365 struct disklabel32 *dp;
367 if (strcmp(type, "auto") == 0)
368 dp = getvirginlabel();
370 dp = getdisklabelfromdisktab(type);
372 errx(1, "%s: unknown disk type", type);
376 * NOTE: boot control files may no longer be specified in disktab.
379 strncpy(lp->d_packname, name, sizeof(lp->d_packname));
383 writelabel(int f, const char *boot, struct disklabel32 *lp)
390 Warning("write to disk label supressed - label was as follows:");
394 /* make sure we are not overwriting our boot code */
395 if (checkoldboot(f, boot))
396 errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!");
398 lp->d_magic = DISKMAGIC32;
399 lp->d_magic2 = DISKMAGIC32;
401 lp->d_checksum = dkcksum32(lp);
404 * First set the kernel disk label,
405 * then write a label to the raw disk.
406 * If the SDINFO ioctl fails because it is unimplemented,
407 * keep going; otherwise, the kernel consistency checks
408 * may prevent us from changing the current (in-core)
411 if (ioctl(f, DIOCSDINFO32, lp) < 0 &&
412 errno != ENODEV && errno != ENOTTY) {
413 l_perror("ioctl DIOCSDINFO");
416 lseek(f, (off_t)0, SEEK_SET);
419 * write enable label sector before write
420 * (if necessary), disable after writing.
423 if (ioctl(f, DIOCWLABEL, &flag) < 0)
424 warn("ioctl DIOCWLABEL");
425 msg = fixlabel(f, lp, 1);
430 r = write(f, boot, lp->d_bbsize);
432 if (r != ((ssize_t)lp->d_bbsize)) {
438 * Output the remainder of the disklabel
442 r = write(f, bootbuf, bootsize);
451 ioctl(f, DIOCWLABEL, &flag);
452 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) {
453 l_perror("ioctl DIOCWDINFO");
461 l_perror(const char *s)
466 warnx("%s: no disk label on disk;", s);
467 fprintf(stderr, "add \"-r\" to install initial label\n");
471 warnx("%s: label magic number or checksum is wrong!", s);
472 fprintf(stderr, "(disklabel or kernel is out of date?)\n");
476 warnx("%s: open partition would move or shrink", s);
480 warnx("%s: '%c' partition must start at beginning of disk",
491 * Fetch disklabel for disk.
492 * Use ioctl to get label unless -r flag is given.
498 struct disklabel32 *lp;
502 r = read(f, bootarea, BBSIZE);
504 err(4, "%s", specname);
505 for (lp = (struct disklabel32 *)bootarea;
506 lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp));
507 lp = (struct disklabel32 *)((char *)lp + 16)) {
508 if (lp->d_magic == DISKMAGIC32 &&
509 lp->d_magic2 == DISKMAGIC32)
512 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) ||
513 lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 ||
514 dkcksum32(lp) != 0) {
515 errx(1, "bad pack magic number (label is damaged, "
516 "or pack is unlabeled)");
518 if ((msg = fixlabel(f, lp, 0)) != NULL)
522 if (ioctl(f, DIOCGDINFO32, lp) < 0)
523 err(4, "ioctl DIOCGDINFO");
529 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot''
530 * Returns a pointer to the disklabel portion of the bootarea.
533 makebootarea(char *boot, struct disklabel32 *dp, int f)
535 struct disklabel32 *lp;
544 unsigned int i, found;
548 if (dp->d_secsize == 0) {
549 dp->d_secsize = DEV_BSIZE;
550 dp->d_bbsize = BBSIZE;
552 lp = (struct disklabel32 *)
553 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32);
554 bzero((char *)lp, sizeof *lp);
557 * If we are not installing a boot program but we are installing a
558 * label on disk then we must read the current bootarea so we don't
559 * clobber the existing boot.
563 if (read(f, boot, BBSIZE) < BBSIZE)
564 err(4, "%s", specname);
565 bzero((char *)lp, sizeof *lp);
570 * We are installing a boot program. Determine the name(s) and
571 * read them into the appropriate places in the boot area.
573 if (!xxboot || !bootxx) {
575 if ((p = strrchr(dkname, '/')) == NULL)
579 while (*p && !isdigit(*p))
584 sprintf(boot0, "%s/boot1", _PATH_BOOTDIR);
589 sprintf(boot1, "%s/boot2", _PATH_BOOTDIR);
596 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n",
597 xxboot, bootxx ? bootxx : "NONE");
602 * 1. One-piece bootstrap (hp300/hp800)
603 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest
604 * is remembered and written later following the bootarea.
605 * 2. Two-piece bootstraps (vax/i386?/mips?)
606 * up to d_secsize bytes of ``xxboot'' go in first d_secsize
607 * bytes of bootarea, remaining d_bbsize-d_secsize filled
610 b = open(xxboot, O_RDONLY);
612 err(4, "%s", xxboot);
617 * The i386 has the so-called fdisk table embedded into the
618 * primary bootstrap. We take care to not clobber it, but
619 * only if it does already contain some data. (Otherwise,
620 * the xxboot provides a template.)
622 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0)
623 err(4, "%s", xxboot);
624 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize);
626 if (read(b, boot, (int)dp->d_secsize) < 0)
627 err(4, "%s", xxboot);
630 for (i = DOSPARTOFF, found = 0;
631 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition);
633 found = tmpbuf[i] != 0;
635 memcpy((void *)&boot[DOSPARTOFF],
636 (void *)&tmpbuf[DOSPARTOFF],
637 NDOSPART * sizeof(struct dos_partition));
640 b = open(bootxx, O_RDONLY);
642 err(4, "%s", bootxx);
643 if (fstat(b, &sb) != 0)
644 err(4, "%s", bootxx);
645 if (dp->d_secsize + sb.st_size > dp->d_bbsize)
646 errx(4, "%s too large", bootxx);
647 if (read(b, &boot[dp->d_secsize],
648 (int)(dp->d_bbsize-dp->d_secsize)) < 0)
649 err(4, "%s", bootxx);
650 #else /* !(NUMBOOT > 1) */
651 if (read(b, boot, (int)dp->d_bbsize) < 0)
652 err(4, "%s", xxboot);
653 if (fstat(b, &sb) != 0)
654 err(4, "%s", xxboot);
655 bootsize = (int)sb.st_size - dp->d_bbsize;
657 /* XXX assume d_secsize is a power of two */
658 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1);
659 bootbuf = (char *)malloc((size_t)bootsize);
661 err(4, "%s", xxboot);
662 if (read(b, bootbuf, bootsize) < 0) {
664 err(4, "%s", xxboot);
667 #endif /* NUMBOOT > 1 */
669 #endif /* NUMBOOT > 0 */
671 * Make sure no part of the bootstrap is written in the area
672 * reserved for the label.
674 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++)
676 errx(2, "bootstrap doesn't leave room for disk label");
681 display(FILE *f, const struct disklabel32 *lp)
684 const struct partition32 *pp;
686 fprintf(f, "# %s:\n", specname);
687 if (lp->d_type < DKMAXTYPES)
688 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
690 fprintf(f, "type: %u\n", lp->d_type);
691 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
693 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
695 fprintf(f, "flags:");
697 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
698 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
699 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
700 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
701 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
702 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
703 fprintf(f, "rpm: %u\n", lp->d_rpm);
704 fprintf(f, "interleave: %u\n", lp->d_interleave);
705 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
706 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
707 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
708 (u_long)lp->d_headswitch);
709 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
710 (u_long)lp->d_trkseek);
711 fprintf(f, "drivedata: ");
712 for (i = NDDATA32 - 1; i >= 0; i--) {
713 if (lp->d_drivedata[i])
718 for (j = 0; j <= i; j++)
719 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
720 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions);
722 "# size offset fstype \n");
723 pp = lp->d_partitions;
724 for (i = 0; i < lp->d_npartitions; i++, pp++) {
726 u_long onemeg = 1024 * 1024 / lp->d_secsize;
727 fprintf(f, " %c: ", 'a' + i);
729 fprintf(f, "%10lu ", (u_long)pp->p_size);
730 fprintf(f, "%10lu ", (u_long)pp->p_offset);
731 if (pp->p_fstype < FSMAXTYPES)
732 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
734 fprintf(f, "%8d", pp->p_fstype);
736 fprintf(f, "\t# %11.3fM", (double)pp->p_size / onemeg);
744 edit(struct disklabel32 *lp, int f)
747 struct disklabel32 label;
750 if ((fd = mkstemp(tmpfil)) == -1 ||
751 (fp = fdopen(fd, "w")) == NULL) {
752 warnx("can't create %s", tmpfil);
760 fp = fopen(tmpfil, "r");
762 warnx("can't reopen %s for reading", tmpfil);
765 bzero((char *)&label, sizeof(label));
766 if (getasciilabel(fp, &label)) {
768 if (writelabel(f, bootarea, lp) == 0) {
775 printf("re-edit the label? [y]: "); fflush(stdout);
777 if (c != EOF && c != (int)'\n')
778 while (getchar() != (int)'\n')
794 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
795 while ((pid = fork()) < 0) {
796 if (errno == EPROCLIM) {
797 warnx("you have too many processes");
800 if (errno != EAGAIN) {
810 if ((ed = getenv("EDITOR")) == (char *)0)
812 execlp(ed, ed, tmpfil, (char *)0);
815 while ((xpid = wait(&status)) >= 0)
826 while (*cp != '\0' && isspace(*cp))
828 if (*cp == '\0' || *cp == '#')
838 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
840 if ((c = *cp) != '\0') {
849 * Read an ascii label in from fd f,
850 * in the same format as that put out by display(),
854 getasciilabel(FILE *f, struct disklabel32 *lp)
859 char *tp, line[BUFSIZ];
861 int lineno = 0, errors = 0;
864 char unknown[] = "unknown";
866 bzero(&part_set, sizeof(part_set));
867 bzero(&part_size_type, sizeof(part_size_type));
868 bzero(&part_offset_type, sizeof(part_offset_type));
869 lp->d_bbsize = BBSIZE; /* XXX */
870 lp->d_sbsize = SBSIZE; /* XXX */
871 while (fgets(line, sizeof(line) - 1, f)) {
873 if ((cp = strchr(line,'\n')) != 0)
878 tp = strchr(cp, ':');
880 fprintf(stderr, "line %d: syntax error\n", lineno);
884 *tp++ = '\0', tp = skip(tp);
885 if (streq(cp, "type")) {
889 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) {
890 if (*cpp && streq(*cpp, tp)) {
891 lp->d_type = cpp - dktypenames;
895 if (cpp < &dktypenames[DKMAXTYPES])
897 v = strtoul(tp, NULL, 10);
898 if (v >= DKMAXTYPES) {
899 fprintf(stderr, "line %d:%s %lu\n", lineno,
900 "Warning, unknown disk type", v);
905 if (streq(cp, "flags")) {
906 for (v = 0; (cp = tp) && *cp != '\0';) {
908 if (streq(cp, "removeable"))
909 v |= 0; /* obsolete */
910 else if (streq(cp, "ecc"))
911 v |= 0; /* obsolete */
912 else if (streq(cp, "badsect"))
913 v |= 0; /* obsolete */
916 "line %d: %s: bad flag\n",
924 if (streq(cp, "drivedata")) {
925 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) {
926 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
931 if (sscanf(cp, "%lu partitions", &v) == 1) {
932 if (v == 0 || v > MAXPARTITIONS32) {
934 "line %d: bad # of partitions\n", lineno);
935 lp->d_npartitions = MAXPARTITIONS32;
938 lp->d_npartitions = v;
943 if (streq(cp, "disk")) {
944 strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
947 if (streq(cp, "label")) {
948 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
951 if (streq(cp, "bytes/sector")) {
952 v = strtoul(tp, NULL, 10);
953 if (v == 0 || (v % DEV_BSIZE) != 0) {
955 "line %d: %s: bad sector size\n",
962 if (streq(cp, "sectors/track")) {
963 v = strtoul(tp, NULL, 10);
964 #if (ULONG_MAX != 0xffffffffUL)
965 if (v == 0 || v > 0xffffffff) {
969 fprintf(stderr, "line %d: %s: bad %s\n",
976 if (streq(cp, "sectors/cylinder")) {
977 v = strtoul(tp, NULL, 10);
979 fprintf(stderr, "line %d: %s: bad %s\n",
986 if (streq(cp, "tracks/cylinder")) {
987 v = strtoul(tp, NULL, 10);
989 fprintf(stderr, "line %d: %s: bad %s\n",
996 if (streq(cp, "cylinders")) {
997 v = strtoul(tp, NULL, 10);
999 fprintf(stderr, "line %d: %s: bad %s\n",
1003 lp->d_ncylinders = v;
1006 if (streq(cp, "sectors/unit")) {
1007 v = strtoul(tp, NULL, 10);
1009 fprintf(stderr, "line %d: %s: bad %s\n",
1013 lp->d_secperunit = v;
1016 if (streq(cp, "rpm")) {
1017 v = strtoul(tp, NULL, 10);
1018 if (v == 0 || v > USHRT_MAX) {
1019 fprintf(stderr, "line %d: %s: bad %s\n",
1026 if (streq(cp, "interleave")) {
1027 v = strtoul(tp, NULL, 10);
1028 if (v == 0 || v > USHRT_MAX) {
1029 fprintf(stderr, "line %d: %s: bad %s\n",
1033 lp->d_interleave = v;
1036 if (streq(cp, "trackskew")) {
1037 v = strtoul(tp, NULL, 10);
1038 if (v > USHRT_MAX) {
1039 fprintf(stderr, "line %d: %s: bad %s\n",
1043 lp->d_trackskew = v;
1046 if (streq(cp, "cylinderskew")) {
1047 v = strtoul(tp, NULL, 10);
1048 if (v > USHRT_MAX) {
1049 fprintf(stderr, "line %d: %s: bad %s\n",
1056 if (streq(cp, "headswitch")) {
1057 v = strtoul(tp, NULL, 10);
1058 lp->d_headswitch = v;
1061 if (streq(cp, "track-to-track seek")) {
1062 v = strtoul(tp, NULL, 10);
1066 /* the ':' was removed above */
1067 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
1069 "line %d: %s: Unknown disklabel field\n", lineno,
1075 /* Process a partition specification line. */
1077 if (part >= lp->d_npartitions) {
1079 "line %d: partition name out of range a-%c: %s\n",
1080 lineno, 'a' + lp->d_npartitions - 1, cp);
1086 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1091 errors += checklabel(lp);
1092 return (errors == 0);
1095 #define NXTNUM(n) do { \
1097 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1100 cp = tp, tp = word(cp); \
1101 (n) = strtoul(cp, NULL, 10); \
1105 /* retain 1 character following number */
1106 #define NXTWORD(w,n) do { \
1108 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1112 cp = tp, tp = word(cp); \
1113 (n) = strtoul(cp, &tmp, 10); \
1114 if (tmp) (w) = *tmp; \
1119 * Read a partition line into partition `part' in the specified disklabel.
1120 * Return 0 on success, 1 on failure.
1123 getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno)
1125 struct partition32 *pp;
1130 pp = &lp->d_partitions[part];
1137 NXTWORD(part_size_type[part],v);
1138 if (v == 0 && part_size_type[part] != '*') {
1140 "line %d: %s: bad partition size\n", lineno, cp);
1149 NXTWORD(part_offset_type[part],v);
1150 if (v == 0 && part_offset_type[part] != '*' &&
1151 part_offset_type[part] != '\0') {
1153 "line %d: %s: bad partition offset\n", lineno, cp);
1163 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1164 if (*cpp && streq(*cpp, cp))
1167 pp->p_fstype = cpp - fstypenames;
1170 v = strtoul(cp, NULL, 10);
1173 if (v >= FSMAXTYPES) {
1175 "line %d: Warning, unknown filesystem type %s\n",
1188 fprintf(stderr, "line %d: Warning, fragment, block, "
1189 "and bps/cpg fields are no\n"
1190 "longer supported and must be specified "
1191 "via newfs options instead.\n",
1198 * Check disklabel for errors and fill in
1199 * derived fields according to supplied values.
1202 checklabel(struct disklabel32 *lp)
1204 struct partition32 *pp;
1207 u_long total_size, total_percent, current_offset;
1208 int seen_default_offset;
1211 struct partition32 *pp2;
1213 if (lp->d_secsize == 0) {
1214 fprintf(stderr, "sector size 0\n");
1217 if (lp->d_nsectors == 0) {
1218 fprintf(stderr, "sectors/track 0\n");
1221 if (lp->d_ntracks == 0) {
1222 fprintf(stderr, "tracks/cylinder 0\n");
1225 if (lp->d_ncylinders == 0) {
1226 fprintf(stderr, "cylinders/unit 0\n");
1230 Warning("revolutions/minute 0");
1231 if (lp->d_secpercyl == 0)
1232 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1233 if (lp->d_secperunit == 0)
1234 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1235 if (lp->d_bbsize == 0) {
1236 fprintf(stderr, "boot block size 0\n");
1238 } else if (lp->d_bbsize % lp->d_secsize)
1239 Warning("boot block size %% sector-size != 0");
1240 if (lp->d_sbsize == 0) {
1241 fprintf(stderr, "super block size 0\n");
1243 } else if (lp->d_sbsize % lp->d_secsize)
1244 Warning("super block size %% sector-size != 0");
1245 if (lp->d_npartitions > MAXPARTITIONS32)
1246 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)",
1247 (u_long)lp->d_npartitions, MAXPARTITIONS32);
1249 /* first allocate space to the partitions, then offsets */
1250 total_size = 0; /* in sectors */
1251 total_percent = 0; /* in percent */
1253 /* find all fixed partitions */
1254 for (i = 0; i < lp->d_npartitions; i++) {
1255 pp = &lp->d_partitions[i];
1257 if (part_size_type[i] == '*') {
1258 if (i == RAW_PART) {
1259 pp->p_size = lp->d_secperunit;
1262 Warning("Too many '*' partitions (%c and %c)",
1263 hog_part + 'a',i + 'a');
1271 switch (part_size_type[i]) {
1273 total_percent += size;
1281 size *= 1024ULL * 1024ULL;
1285 size *= 1024ULL * 1024ULL * 1024ULL;
1290 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]);
1293 /* don't count %'s yet */
1294 if (part_size_type[i] != '%') {
1296 * for all not in sectors, convert to
1299 if (part_size_type[i] != '\0') {
1300 if (size % lp->d_secsize != 0)
1301 Warning("partition %c not an integer number of sectors",
1303 size /= lp->d_secsize;
1306 /* else already in sectors */
1313 /* handle % partitions - note %'s don't need to add up to 100! */
1314 if (total_percent != 0) {
1315 long free_space = lp->d_secperunit - total_size;
1316 if (total_percent > 100) {
1317 fprintf(stderr,"total percentage %lu is greater than 100\n",
1322 if (free_space > 0) {
1323 for (i = 0; i < lp->d_npartitions; i++) {
1324 pp = &lp->d_partitions[i];
1325 if (part_set[i] && part_size_type[i] == '%') {
1326 /* careful of overflows! and integer roundoff */
1327 pp->p_size = ((double)pp->p_size/100) * free_space;
1328 total_size += pp->p_size;
1330 /* FIX we can lose a sector or so due to roundoff per
1331 partition. A more complex algorithm could avoid that */
1336 "%ld sectors available to give to '*' and '%%' partitions\n",
1339 /* fix? set all % partitions to size 0? */
1342 /* give anything remaining to the hog partition */
1343 if (hog_part != -1) {
1344 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
1345 total_size = lp->d_secperunit;
1348 /* Now set the offsets for each partition */
1349 current_offset = 0; /* in sectors */
1350 seen_default_offset = 0;
1351 for (i = 0; i < lp->d_npartitions; i++) {
1353 pp = &lp->d_partitions[i];
1355 if (part_offset_type[i] == '*') {
1356 if (i == RAW_PART) {
1359 pp->p_offset = current_offset;
1360 seen_default_offset = 1;
1363 /* allow them to be out of order for old-style tables */
1364 if (pp->p_offset < current_offset &&
1365 seen_default_offset && i != RAW_PART &&
1366 pp->p_fstype != FS_VINUM) {
1368 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1369 (long)pp->p_offset,i+'a',current_offset);
1371 "Labels with any *'s for offset must be in ascending order by sector\n");
1373 } else if (pp->p_offset != current_offset &&
1374 i != RAW_PART && seen_default_offset) {
1376 * this may give unneeded warnings if
1377 * partitions are out-of-order
1380 "Offset %ld for partition %c doesn't match expected value %ld",
1381 (long)pp->p_offset, i + 'a', current_offset);
1385 current_offset = pp->p_offset + pp->p_size;
1389 for (i = 0; i < lp->d_npartitions; i++) {
1391 pp = &lp->d_partitions[i];
1392 if (pp->p_size == 0 && pp->p_offset != 0)
1393 Warning("partition %c: size 0, but offset %lu",
1394 part, (u_long)pp->p_offset);
1396 if (pp->p_size % lp->d_secpercyl)
1397 Warning("partition %c: size %% cylinder-size != 0",
1399 if (pp->p_offset % lp->d_secpercyl)
1400 Warning("partition %c: offset %% cylinder-size != 0",
1403 if (pp->p_offset > lp->d_secperunit) {
1405 "partition %c: offset past end of unit\n", part);
1408 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1410 "partition %c: partition extends past end of unit\n",
1416 if (pp->p_fstype != FS_UNUSED)
1417 Warning("partition %c is not marked as unused!",part);
1418 if (pp->p_offset != 0)
1419 Warning("partition %c doesn't start at 0!",part);
1420 if (pp->p_size != lp->d_secperunit)
1421 Warning("partition %c doesn't cover the whole unit!",part);
1423 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1424 (pp->p_size != lp->d_secperunit)) {
1425 Warning("An incorrect partition %c may cause problems for "
1426 "standard system utilities",part);
1430 /* check for overlaps */
1431 /* this will check for all possible overlaps once and only once */
1432 for (j = 0; j < i; j++) {
1433 pp2 = &lp->d_partitions[j];
1434 if (j != RAW_PART && i != RAW_PART &&
1435 pp->p_fstype != FS_VINUM &&
1436 pp2->p_fstype != FS_VINUM &&
1437 part_set[i] && part_set[j]) {
1438 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1439 (pp2->p_offset + pp2->p_size > pp->p_offset ||
1440 pp2->p_offset >= pp->p_offset)) {
1441 fprintf(stderr,"partitions %c and %c overlap!\n",
1448 for (; i < 8 || i < lp->d_npartitions; i++) {
1450 pp = &lp->d_partitions[i];
1451 if (pp->p_size || pp->p_offset)
1452 Warning("unused partition %c: size %d offset %lu",
1453 'a' + i, pp->p_size, (u_long)pp->p_offset);
1459 * When operating on a "virgin" disk, try getting an initial label
1460 * from the associated device driver. This might work for all device
1461 * drivers that are able to fetch some initial device parameters
1462 * without even having access to a (BSD) disklabel, like SCSI disks,
1463 * most IDE drives, or vn devices.
1465 * The device name must be given in its "canonical" form.
1467 static struct disklabel32 dlab;
1469 struct disklabel32 *
1470 getvirginlabel(void)
1472 struct disklabel32 *dl = &dlab;
1473 char nambuf[BBSIZE];
1476 if (dkname[0] == '/') {
1477 warnx("\"auto\" requires the usage of a canonical disk name");
1480 snprintf(nambuf, BBSIZE, "%s%s", _PATH_DEV, dkname);
1481 if ((f = open(nambuf, O_RDONLY)) == -1) {
1482 warn("cannot open %s", nambuf);
1487 * Try to use the new get-virgin-label ioctl. If it fails,
1488 * fallback to the old get-disdk-info ioctl.
1490 if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) {
1491 if (ioctl(f, DIOCGDINFO32, dl) < 0) {
1492 warn("ioctl DIOCGDINFO");
1501 struct disklabel32 *
1502 getdisklabelfromdisktab(const char *name)
1505 struct disklabel32 *dl = &dlab;
1508 if ((dt = getdisktabbyname(name)) == NULL)
1510 dl->d_magic = DISKMAGIC32;
1511 dl->d_type = dt->d_typeid;
1513 dl->d_secsize = dt->d_media_blksize;
1514 dl->d_nsectors = dt->d_secpertrack;
1515 dl->d_ntracks = dt->d_nheads;
1516 dl->d_ncylinders = dt->d_ncylinders;
1517 dl->d_secpercyl = dt->d_secpercyl;
1518 dl->d_secperunit = dt->d_media_blocks;
1519 dl->d_rpm = dt->d_rpm;
1520 dl->d_interleave = dt->d_interleave;
1521 dl->d_trackskew = dt->d_trackskew;
1522 dl->d_cylskew = dt->d_cylskew;
1523 dl->d_headswitch = dt->d_headswitch;
1524 dl->d_trkseek = dt->d_trkseek;
1525 dl->d_magic2 = DISKMAGIC32;
1526 dl->d_npartitions = dt->d_npartitions;
1527 dl->d_bbsize = dt->d_bbsize;
1528 dl->d_sbsize = dt->d_sbsize;
1529 for (i = 0; i < dt->d_npartitions; ++i) {
1530 struct partition32 *dlp = &dl->d_partitions[i];
1531 struct dt_partition *dtp = &dt->d_partitions[i];
1533 dlp->p_size = dtp->p_size;
1534 dlp->p_offset = dtp->p_offset;
1535 dlp->p_fsize = dtp->p_fsize;
1536 dlp->p_fstype = dtp->p_fstype;
1537 dlp->p_frag = dtp->p_fsize;
1543 * If we are installing a boot program that doesn't fit in d_bbsize
1544 * we need to mark those partitions that the boot overflows into.
1545 * This allows newfs to prevent creation of a filesystem where it might
1546 * clobber bootstrap code.
1549 setbootflag(struct disklabel32 *lp)
1551 struct partition32 *pp;
1558 boffset = bootsize / lp->d_secsize;
1559 for (i = 0; i < lp->d_npartitions; i++) {
1561 pp = &lp->d_partitions[i];
1562 if (pp->p_size == 0)
1564 if (boffset <= pp->p_offset) {
1565 if (pp->p_fstype == FS_BOOT)
1566 pp->p_fstype = FS_UNUSED;
1567 } else if (pp->p_fstype != FS_BOOT) {
1568 if (pp->p_fstype != FS_UNUSED) {
1570 "boot overlaps used partition %c\n",
1574 pp->p_fstype = FS_BOOT;
1575 Warning("boot overlaps partition %c, %s",
1576 part, "marked as FS_BOOT");
1581 errx(4, "cannot install boot program");
1586 Warning(const char *fmt, ...)
1590 fprintf(stderr, "Warning, ");
1592 vfprintf(stderr, fmt, ap);
1593 fprintf(stderr, "\n");
1598 * Check to see if the bootblocks are in the wrong place. FBsd5 bootblocks
1599 * and earlier DFly bb's are packed against the old disklabel and a new
1600 * disklabel would blow them up. This is a hack that should be removed
1601 * in 2006 sometime (if ever).
1605 checkoldboot(int f, const char *bootbuffer)
1609 if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0)
1611 lseek(f, (off_t)0, SEEK_SET);
1612 if (read(f, buf, sizeof(buf)) != sizeof(buf))
1614 if (strncmp(buf + 0x402, "BTX", 3) == 0) /* new location */
1616 if (strncmp(buf + 0x316, "BTX", 3) == 0) /* old location */
1622 * Traditional 32 bit disklabels actually use absolute sector numbers on
1623 * disk, NOT slice relative sector numbres. The OS hides this from us
1624 * when we use DIOC ioctls to access the label, but newer versions of
1625 * Dragonfly no longer adjusts the disklabel when snooping reads or writes
1626 * so we have to figure it out ourselves.
1629 fixlabel(int f, struct disklabel32 *lp, int writeadj)
1631 const char *msg = NULL;
1632 struct partinfo info;
1633 struct partition32 *pp;
1639 int rev_len = sizeof(rev);
1641 if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) {
1642 errx(1, "Cannot use raw mode on non-DragonFly systems\n");
1645 warnx("Warning running new disklabel on old DragonFly systems,\n"
1646 "assuming the disk layer will fixup the label.\n");
1651 pp = &lp->d_partitions[RAW_PART];
1654 info.media_offset = slice_start_lba * lp->d_secsize;
1655 info.media_blocks = pp->p_size;
1656 info.media_blksize = lp->d_secsize;
1657 } else if (ioctl(f, DIOCGPART, &info) < 0) {
1658 msg = "Unable to extract the slice starting LBA, "
1659 "you must use the -f <slice_start_lba> option\n"
1660 "to specify it manually, or perhaps try without "
1661 "using -r and let the kernel deal with it\n";
1665 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
1666 return ("fixlabel: invalid magic");
1667 if (dkcksum32(lp) != 0)
1668 return ("fixlabel: invalid checksum");
1671 * What a mess. For ages old backwards compatibility the disklabel
1672 * on-disk stores absolute offsets instead of slice-relative offsets.
1673 * So fix it up when reading, writing, or snooping.
1675 * The in-core label is always slice-relative.
1682 offset = info.media_offset / info.media_blksize;
1687 start = info.media_offset / info.media_blksize;
1688 offset = -info.media_offset / info.media_blksize;
1690 if (pp->p_offset != start)
1691 return ("fixlabel: raw partition offset != slice offset");
1692 if (pp->p_size != info.media_blocks) {
1693 if (pp->p_size > info.media_blocks)
1694 return ("fixlabel: raw partition size > slice size");
1696 end = start + info.media_blocks;
1698 return ("fixlabel: slice wraps");
1699 if (lp->d_secpercyl <= 0)
1700 return ("fixlabel: d_secpercyl <= 0");
1702 for (part = 0; part < lp->d_npartitions; part++, pp++) {
1703 if (pp->p_offset != 0 || pp->p_size != 0) {
1704 if (pp->p_offset < start
1705 || pp->p_offset + pp->p_size > end
1706 || pp->p_offset + pp->p_size < pp->p_offset) {
1707 /* XXX else silently discard junk. */
1708 bzero(pp, sizeof *pp);
1710 pp->p_offset += offset;
1715 lp->d_checksum = dkcksum32(lp);
1723 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1724 "usage: disklabel [-r] disk",
1725 "\t\t(to read label)",
1726 " disklabel -w [-r] [-n] disk type [ packid ]",
1727 "\t\t(to write label with existing boot program)",
1728 " disklabel -e [-r] [-n] disk",
1729 "\t\t(to edit label)",
1730 " disklabel -R [-r] [-n] disk protofile",
1731 "\t\t(to restore label with existing boot program)",
1733 " disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]",
1734 "\t\t(to install boot program with existing label)",
1735 " disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]",
1736 "\t\t(to write label and boot program)",
1737 " disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]",
1738 "\t\t(to restore label and boot program)",
1740 " disklabel -B [-n] [ -b bootprog ] disk [ type ]",
1741 "\t\t(to install boot program with existing on-disk label)",
1742 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]",
1743 "\t\t(to write label and install boot program)",
1744 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]",
1745 "\t\t(to restore label and install boot program)",
1747 " disklabel [-NW] disk",
1748 "\t\t(to write disable/enable label)");
1750 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1751 "usage: disklabel [-r] disk", "(to read label)",
1752 " disklabel -w [-r] [-n] disk type [ packid ]",
1753 "\t\t(to write label)",
1754 " disklabel -e [-r] [-n] disk",
1755 "\t\t(to edit label)",
1756 " disklabel -R [-r] [-n] disk protofile",
1757 "\t\t(to restore label)",
1758 " disklabel [-NW] disk",
1759 "\t\t(to write disable/enable label)");