1 /* $NetBSD: disklabel.h,v 1.1.1.1 1998/06/09 07:53:05 dbj Exp $ */ 2 /* 3 * Copyright (c) 1994 Rolf Grossmann 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Rolf Grossmann. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _MACHINE_DISKLABEL_H_ 33 #define _MACHINE_DISKLABEL_H_ 34 35 #define LABELSECTOR 0 /* sector containing label */ 36 #define LABELOFFSET 0 /* offset of label in sector */ 37 #define LABELSIZE 8192 /* size of label */ 38 #define MAXPARTITIONS 8 /* number of partitions */ 39 #define RAW_PART 2 /* raw partition: xx?c */ 40 41 #define CD_V1 0x4e655854 /* version #1: "NeXT" */ 42 #define CD_V2 0x646c5632 /* version #2: "dlV2" */ 43 #define CD_V3 0x646c5633 /* version #3: "dlV3" */ 44 #define IS_DISKLABEL(l) ((l)->cd_version == CD_V1 || (l)->cd_version == CD_V2 \ 45 || (l)->cd_version == CD_V3) 46 47 /* XXX should we really size all this stuff this way ? */ 48 #define CPULBLLEN 24 49 #define MAXDNMLEN 24 50 #define MAXTYPLEN 24 51 #define MAXBFLEN 24 52 #define MAXHNLEN 32 53 #define MAXMPTLEN 16 54 #define MAXFSTLEN 8 55 56 /* The disklabel the way it is on the disk */ 57 struct cpu_disklabel { 58 int cd_version; /* label version */ 59 int cd_label_blkno; /* block # of this label */ 60 int cd_size; /* size of media area (sectors) */ 61 char cd_label[CPULBLLEN]; /* disk name (label) */ 62 u_int cd_flags; /* flags */ 63 #define CD_UNINIT 0x80000000 /* label is uninitialized */ 64 u_int cd_tag; /* volume tag */ 65 char cd_name[MAXDNMLEN]; /* drive (hardware) name */ 66 char cd_type[MAXTYPLEN]; /* drive type */ 67 int cd_secsize; /* # of bytes per sector */ 68 int cd_ntracks; /* # of tracks per cylinder */ 69 int cd_nsectors; /* # of data sectors per track */ 70 int cd_ncylinders; /* # of data cylinders per unit */ 71 int cd_rpm; /* rotational speed */ 72 short cd_front; /* # of sectors in "front porch" */ 73 short cd_back; /* # of sectors in "back porch" */ 74 short cd_ngroups; /* # of alt groups */ 75 short cd_ag_size; /* alt group size (sectors) */ 76 short cd_ag_alts; /* alternate sectors / alt group */ 77 short cd_ag_off; /* sector offset to first alternate */ 78 int cd_boot_blkno[2]; /* boot program locations */ 79 char cd_kernel[MAXBFLEN]; /* default kernel name */ 80 char cd_hostname[MAXHNLEN]; /* host name (usu. where disk was labeled) */ 81 char cd_rootpartition; /* root partition letter e.g. 'a' */ 82 char cd_rwpartition; /* r/w partition letter e.g. 'b' */ 83 struct cpu_partition { 84 int cp_offset; /* starting sector */ 85 int cp_size; /* number of sectors in partition */ 86 short cp_bsize; /* block size in bytes */ 87 short cp_fsize; /* filesystem basic fragment size */ 88 char cp_opt; /* optimization type: 's'pace/'t'ime */ 89 short cp_cpg; /* filesystem cylinders per group */ 90 short cp_density; /* bytes per inode density */ 91 char cp_minfree; /* minfree (%) */ 92 short cp_reserved; /* no useful data here */ 93 char cp_mountpt[MAXMPTLEN];/* default/standard mount point */ 94 char cp_automnt; /* auto-mount when inserted */ 95 char cp_res2; /* alignment byte */ 96 char cp_type[MAXFSTLEN]; /* file system type name */ 97 } cd_partitions[MAXPARTITIONS]; 98 99 union { 100 u_short CD_v3_checksum; /* label version 3 checksum */ 101 #define NBAD 1670 /* sized to make label ~= 8KB */ 102 int CD_bad[NBAD]; /* block number that is bad */ 103 } cd_un; 104 #define cd_v3_checksum cd_un.CD_v3_checksum 105 #define cd_bad cd_un.CD_bad 106 u_short cd_checksum; /* label version 1 or 2 checksum */ 107 }; 108 109 #endif /* _MACHINE_DISKLABEL_H_ */ 110