libdisk/fstype.h

   1 /*
   2  * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #undef XFS_SUPER_MAGIC
  34
  35 /*
  36  * From mount(8) source by Andries Brouwer.  Hacked for XFS by mkp.
  37  * Recent sync's to mount source:
  38  *      - util-linux-2.10o ... 06 Sep 00
  39  *      - util-linux-2.10r ... 06 Dec 00
  40  *      - util-linux-2.11g ... 02 Jul 01
  41  *      - util-linux-2.11u ... 24 Aug 02
  42  */
  43
  44 /* Including <linux/fs.h> became more and more painful.
  45    Below a very abbreviated version of some declarations,
  46    only designed to be able to check a magic number
  47    in case no filesystem type was given. */
  48
  49 #define MINIX_SUPER_MAGIC   0x137F         /* minix v1, 14 char names */
  50 #define MINIX_SUPER_MAGIC2  0x138F         /* minix v1, 30 char names */
  51 #define MINIX2_SUPER_MAGIC  0x2468         /* minix v2, 14 char names */
  52 #define MINIX2_SUPER_MAGIC2 0x2478         /* minix v2, 30 char names */
  53 struct minix_super_block {
  54         u_char   s_dummy[16];
  55         u_char   s_magic[2];
  56 };
  57 #define minixmagic(s)   assemble2le(s.s_magic)
  58
  59 #define ISODCL(from, to) (to - from + 1)
  60 #define ISO_STANDARD_ID "CD001"
  61 struct iso_volume_descriptor {
  62         char type[ISODCL(1,1)]; /* 711 */
  63         char id[ISODCL(2,6)];
  64         char version[ISODCL(7,7)];
  65         char data[ISODCL(8,2048)];
  66 };
  67
  68 #define HS_STANDARD_ID "CDROM"
  69 struct  hs_volume_descriptor {
  70         char foo[ISODCL (  1,   8)]; /* 733 */
  71         char type[ISODCL (  9,   9)]; /* 711 */
  72         char id[ISODCL ( 10,  14)];
  73         char version[ISODCL ( 15,  15)]; /* 711 */
  74         char data[ISODCL(16,2048)];
  75 };
  76
  77 #define EXT_SUPER_MAGIC 0x137D
  78 struct ext_super_block {
  79         u_char   s_dummy[56];
  80         u_char   s_magic[2];
  81 };
  82 #define extmagic(s)     assemble2le(s.s_magic)
  83
  84 #define EXT2_PRE_02B_MAGIC  0xEF51
  85 #define EXT2_SUPER_MAGIC    0xEF53
  86 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
  87 struct ext2_super_block {
  88         u_char  s_dummy1[56];
  89         u_char  s_magic[2];
  90         u_char  s_dummy2[34];
  91         u_char  s_feature_compat[4];
  92         u_char  s_feature_incompat[4];
  93         u_char  s_feature_ro_compat[4];
  94         u_char  s_uuid[16];
  95         u_char  s_volume_name[16];
  96         u_char  s_dummy3[88];
  97         u_char  s_journal_inum[4];      /* ext3 only */
  98 };
  99 #define ext2magic(s)    assemble2le(s.s_magic)
 100
 101 struct reiserfs_super_block
 102 {
 103         u_char          s_block_count[4];
 104         u_char          s_free_blocks[4];
 105         u_char          s_root_block[4];
 106         u_char          s_journal_block[4];
 107         u_char          s_journal_dev[4];
 108         u_char          s_orig_journal_size[4];
 109         u_char          s_journal_trans_max[4];
 110         u_char          s_journal_block_count[4];
 111         u_char          s_journal_max_batch[4];
 112         u_char          s_journal_max_commit_age[4];
 113         u_char          s_journal_max_trans_age[4];
 114         u_char          s_blocksize[2];
 115         u_char          s_oid_maxsize[2];
 116         u_char          s_oid_cursize[2];
 117         u_char          s_state[2];
 118         u_char          s_magic[12];
 119 };
 120 #define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
 121 #define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
 122 #define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
 123 /* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */
 124 #define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
 125
 126 #define _XIAFS_SUPER_MAGIC 0x012FD16D
 127 struct xiafs_super_block {
 128     u_char     s_boot_segment[512];     /*  1st sector reserved for boot */
 129     u_char     s_dummy[60];
 130     u_char     s_magic[4];
 131 };
 132 #define xiafsmagic(s)   assemble4le(s.s_magic)
 133
 134 /* From jj@sunsite.ms.mff.cuni.cz Mon Mar 23 15:19:05 1998 */
 135 #define UFS_SUPER_MAGIC_LE 0x00011954
 136 #define UFS_SUPER_MAGIC_BE 0x54190100
 137 struct ufs_super_block {
 138     u_char     s_dummy[0x55c];
 139     u_char     s_magic[4];
 140 };
 141 #define ufsmagic(s)     assemble4le(s.s_magic)
 142
 143 /* From Richard.Russon@ait.co.uk Wed Feb 24 08:05:27 1999 */
 144 #define NTFS_SUPER_MAGIC "NTFS"
 145 struct ntfs_super_block {
 146     u_char    s_dummy[3];
 147     u_char    s_magic[4];
 148 };
 149
 150 /* From inspection of a few FAT filesystems - aeb */
 151 /* Unfortunately I find almost the same thing on an extended partition;
 152    it looks like a primary has some directory entries where the extended
 153    has a partition table: IO.SYS, MSDOS.SYS, WINBOOT.SYS */
 154 struct fat_super_block {
 155     u_char    s_dummy[3];
 156     u_char    s_os[8];          /* "MSDOS5.0" or "MSWIN4.0" or "MSWIN4.1" */
 157                                 /* mtools-3.9.4 writes "MTOOL394" */
 158     u_char    s_dummy2[32];
 159     u_char    s_label[11];      /* for DOS? */
 160     u_char    s_fs[8];          /* "FAT12   " or "FAT16   " or all zero   */
 161                                 /* OS/2 BM has "FAT     " here. */
 162     u_char    s_dummy3[9];
 163     u_char    s_label2[11];     /* for Windows? */
 164     u_char    s_fs2[8];         /* garbage or "FAT32   " */
 165 };
 166
 167 #define XFS_SUPER_MAGIC "XFSB"
 168 struct xfs_super_block {
 169     u_char    s_magic[4];
 170     u_char    s_dummy[28];
 171     u_char    s_uuid[16];
 172     u_char    s_dummy2[60];
 173     u_char    s_fname[12];
 174 };
 175
 176 #define CRAMFS_SUPER_MAGIC 0x28cd3d45
 177 struct cramfs_super_block {
 178         u_char    s_magic[4];
 179         u_char    s_dummy[12];
 180         u_char    s_id[16];
 181 };
 182 #define cramfsmagic(s)  assemble4le(s.s_magic)
 183
 184 #define HFS_SUPER_MAGIC 0x4244
 185 struct hfs_super_block {
 186         u_char    s_magic[2];
 187         u_char    s_dummy[18];
 188         u_char    s_blksize[4];
 189 };
 190 #define hfsmagic(s)     assemble2le(s.s_magic)
 191 #define hfsblksize(s)   assemble4le(s.s_blksize)
 192
 193 #define HPFS_SUPER_MAGIC 0xf995e849
 194 struct hpfs_super_block {
 195         u_char    s_magic[4];
 196         u_char    s_magic2[4];
 197 };
 198 #define hpfsmagic(s)    assemble4le(s.s_magic)
 199
 200 struct adfs_super_block {
 201         u_char    s_dummy[448];
 202         u_char    s_blksize[1];
 203         u_char    s_dummy2[62];
 204         u_char    s_checksum[1];
 205 };
 206 #define adfsblksize(s)  ((uint) s.s_blksize[0])
 207
 208 /* found in first 4 bytes of block 1 */
 209 struct vxfs_super_block {
 210         u_char  s_magic[4];
 211 };
 212 #define vxfsmagic(s)    assemble4le(s.s_magic)
 213 #define VXFS_SUPER_MAGIC 0xa501FCF5
 214
 215 struct jfs_super_block {
 216         char    s_magic[4];
 217         u_char  s_version[4];
 218         u_char  s_dummy1[93];
 219         char    s_fpack[11];
 220         u_char  s_dummy2[24];
 221         u_char  s_uuid[16];
 222         char    s_label[16];
 223 };
 224 #define JFS_SUPER1_OFF 0x8000
 225 #define JFS_MAGIC "JFS1"
 226
 227 struct sysv_super_block {
 228         u_char  s_dummy1[504];
 229         u_char  s_magic[4];
 230         u_char  type[4];
 231 };
 232 #define sysvmagic(s)            assemble4le(s.s_magic)
 233 #define SYSV_SUPER_MAGIC        0xfd187e20
 234
 235 struct mdp_super_block {
 236         u_char  md_magic[4];
 237 };
 238 #define MD_SB_MAGIC     0xa92b4efc
 239 #define mdsbmagic(s)    assemble4le(s.md_magic)
 240
 241 static inline int
 242 assemble2le(unsigned char *p) {
 243         return (p[0] | (p[1] << 8));
 244 }
 245
 246 static inline int
 247 assemble4le(unsigned char *p) {
 248         return (p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24));
 249 }