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Support VTOC volume names. This can be useful to distinguish multiple
disks in a system. Solaris' format(1m) displays the volume names in the disk overview. MFC after: 1 month
This commit is contained in:
Joerg Wunsch
parent
04d114aa99
commit
3328bbeef2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=144328
@ -26,7 +26,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 1, 2004
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.Dd March 30, 2005
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.Dt SUNLABEL 8
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.Os
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.Sh NAME
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@ -238,7 +238,7 @@ be written to disk.
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The label presented for editing is the same as the standard
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printout, with some added hints about the possible options to
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specify the sector size and starting cylinder.
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There are two areas in the template that can be edited:
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The following areas in the template that can be edited:
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.Bl -tag -width indent
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.It Sy Textual label, geometry emulation
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The line
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@ -266,6 +266,15 @@ The product
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.D1 Em (CC + 2) * HH * SS
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must be less than or equal to the total number of sectors of the
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disk (which is given as a hint in a comment field).
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.It Sy Volume name
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The volume name (if present) is introduced by the string
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.Dq "volume name:" .
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It can be up to 8 characters long, and might be useful to distinguish
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different disks in a system.
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Note that volume names require the VTOC elements to be present, so
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any of the VTOC constraints described below need to be obeyed as well
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if a volume name is to be set.
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Setting an empty volume name will delete it from the label.
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.It Sy Partition entries
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Partition entries start with a letter from
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.Ql a
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@ -1,6 +1,6 @@
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/*-
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* Copyright (c) 2003 Jake Burkholder.
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* Copyright (c) 2004 Joerg Wunsch.
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* Copyright (c) 2004,2005 Joerg Wunsch.
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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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@ -541,6 +541,7 @@ parse_label(struct sun_disklabel *sl, const char *file)
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char tag[32];
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char buf[128];
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char text[128];
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char volname[SUN_VOLNAME_LEN + 1];
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struct sun_disklabel sl1;
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char *bp;
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const char *what;
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@ -631,6 +632,33 @@ parse_label(struct sun_disklabel *sl, const char *file)
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text, cyl, alt, hd, sec);
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continue;
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}
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if (strncmp(bp, "volume name:", strlen("volume name:")) == 0) {
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wantvtoc = 1; /* Volume name requires VTOC. */
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bp += strlen("volume name:");
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#if SUN_VOLNAME_LEN != 8
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# error "scanf field width does not match SUN_VOLNAME_LEN"
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#endif
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/*
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* We set the field length to one more than
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* SUN_VOLNAME_LEN to allow detecting an
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* overflow.
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*/
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memset(volname, 0, sizeof volname);
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rv = sscanf(bp, " %9[^\n]", volname);
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if (rv != 1) {
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/* Clear the volume name. */
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memset(sl1.sl_vtoc_volname, 0,
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SUN_VOLNAME_LEN);
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} else {
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memcpy(sl1.sl_vtoc_volname, volname,
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SUN_VOLNAME_LEN);
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if (volname[SUN_VOLNAME_LEN] != '\0')
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warnx(
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"%s, line %d: volume name longer than %d characters, truncating",
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file, line + 1, SUN_VOLNAME_LEN);
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}
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continue;
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}
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if (strlen(bp) < 2 || bp[1] != ':') {
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line++;
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continue;
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@ -742,9 +770,11 @@ parse_offset(struct sun_disklabel *sl, int part, char *offset)
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static void
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print_label(struct sun_disklabel *sl, const char *disk, FILE *out)
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{
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int i;
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int i, j;
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int havevtoc;
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uintmax_t secpercyl;
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/* Long enough to hex-encode each character. */
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char volname[4 * SUN_VOLNAME_LEN + 1];
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havevtoc = sl->sl_vtoc_sane == SUN_VTOC_SANE;
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secpercyl = sl->sl_nsectors * sl->sl_ntracks;
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@ -763,11 +793,25 @@ print_label(struct sun_disklabel *sl, const char *disk, FILE *out)
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"# max sectors/unit (including alt cylinders): %ju\n",
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(uintmax_t)mediasize / sectorsize);
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fprintf(out,
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"sectors/unit: %ju\n"
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"sectors/unit: %ju\n",
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secpercyl * sl->sl_ncylinders);
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if (havevtoc && sl->sl_vtoc_volname[0] != '\0') {
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for (i = j = 0; i < SUN_VOLNAME_LEN; i++) {
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if (sl->sl_vtoc_volname[i] == '\0')
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break;
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if (isprint(sl->sl_vtoc_volname[i]))
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volname[j++] = sl->sl_vtoc_volname[i];
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else
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j += sprintf(volname + j, "\\x%02X",
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sl->sl_vtoc_volname[i]);
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}
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volname[j] = '\0';
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fprintf(out, "volume name: %s\n", volname);
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}
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fprintf(out,
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"\n"
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"%d partitions:\n"
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"#\n",
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secpercyl * sl->sl_ncylinders,
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SUN_NPART);
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if (!hflag) {
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fprintf(out, "# Size is in %s.", cflag? "cylinders": "sectors");
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@ -1,7 +1,7 @@
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/*-
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* Copyright (c) 2003 Jake Burkholder
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* Copyright (c) 2003 Poul-Henning Kamp
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* Copyright (c) 2004 Joerg Wunsch
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* Copyright (c) 2004,2005 Joerg Wunsch
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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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@ -38,10 +38,16 @@ __FBSDID("$FreeBSD$");
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/sun_disklabel.h>
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#ifdef _KERNEL
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#include <sys/systm.h>
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#else
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#include <string.h>
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#endif
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#define SL_TEXT 0x0
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#define SL_TEXT_SIZEOF 0x80
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#define SL_VTOC_VERS 0x80
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#define SL_VTOC_VOLNAME 0x84
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#define SL_VTOC_NPART 0x8c
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#define SL_VTOC_MAP 0x8e
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#define SL_VTOC_SANITY 0xbc
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@ -105,6 +111,8 @@ sunlabel_dec(void const *pp, struct sun_disklabel *sl)
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*/
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sl->sl_vtoc_sane = vtocsane;
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sl->sl_vtoc_vers = be32dec(p + SL_VTOC_VERS);
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memcpy(sl->sl_vtoc_volname, p + SL_VTOC_VOLNAME,
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SUN_VOLNAME_LEN);
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sl->sl_vtoc_nparts = SUN_NPART;
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for (i = 0; i < SUN_NPART; i++) {
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sl->sl_vtoc_map[i].svtoc_tag = be16dec(p +
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@ -156,6 +164,8 @@ sunlabel_enc(void *pp, struct sun_disklabel *sl)
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*/
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be32enc(p + SL_VTOC_VERS, sl->sl_vtoc_vers);
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be32enc(p + SL_VTOC_SANITY, SUN_VTOC_SANE);
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memcpy(p + SL_VTOC_VOLNAME, sl->sl_vtoc_volname,
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SUN_VOLNAME_LEN);
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be16enc(p + SL_VTOC_NPART, SUN_NPART);
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for (i = 0; i < SUN_NPART; i++) {
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be16enc(p + SL_VTOC_MAP + (i * SVTOC_SIZEOF)
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@ -1,7 +1,7 @@
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 2004, Joerg Wunsch
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* Copyright (c) 2004,2005 Joerg Wunsch
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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@ -54,6 +54,7 @@
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#define SUN_SIZE 512
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#define SUN_VTOC_VERSION 1
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#define SUN_VTOC_SANE 0x600DDEEE /* SVR4-compatible VTOC is "sane". */
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#define SUN_VOLNAME_LEN 8
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/*
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* XXX: I am actually not sure if this should be "16 sectors" or "8192 bytes".
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* XXX: Considering that Sun went to the effort of getting 512 byte compatible
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@ -98,6 +99,7 @@ struct sun_disklabel {
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/* SVR4 VTOC information */
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u_int32_t sl_vtoc_vers; /* == SUN_VTOC_VERSION */
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char sl_vtoc_volname[SUN_VOLNAME_LEN];
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u_int16_t sl_vtoc_nparts; /* == SUN_NPART */
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struct sun_vtoc_info sl_vtoc_map[SUN_NPART]; /* partition tag/flag */
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u_int32_t sl_vtoc_sane; /* == SUN_VTOC_SANE */
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