1 /* vi: set sw=4 ts=4: */
3 * probe.h - constants and on-disk structures for extracting device data
5 * Copyright (C) 1999 by Andries Brouwer
6 * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
7 * Copyright (C) 2001 by Andreas Dilger
10 * This file may be redistributed under the terms of the
11 * GNU Lesser General Public License.
15 #ifndef _BLKID_PROBE_H
16 #define _BLKID_PROBE_H
18 #include <linux/types.h>
22 typedef int (*blkid_probe_t)(int fd, blkid_cache cache, blkid_dev dev,
23 const struct blkid_magic *id, unsigned char *buf);
26 const char *bim_type; /* type name for this magic */
27 long bim_kboff; /* kilobyte offset of superblock */
28 unsigned bim_sboff; /* byte offset within superblock */
29 unsigned bim_len; /* length of magic */
30 const char *bim_magic; /* magic string */
31 blkid_probe_t bim_probe; /* probe function */
35 * Structures for each of the content types we want to extract information
36 * from. We do not necessarily need the magic field here, because we have
37 * already identified the content type before we get this far. It may still
38 * be useful if there are probe functions which handle multiple content types.
40 struct ext2_super_block {
43 __u32 s_r_blocks_count;
44 __u32 s_free_blocks_count;
45 __u32 s_free_inodes_count;
46 __u32 s_first_data_block;
47 __u32 s_log_block_size;
49 unsigned char s_magic[2];
52 __u32 s_feature_compat;
53 __u32 s_feature_incompat;
54 __u32 s_feature_ro_compat;
55 unsigned char s_uuid[16];
56 char s_volume_name[16];
58 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x00000004
59 #define EXT3_FEATURE_INCOMPAT_RECOVER 0x00000004
60 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x00000008
62 struct xfs_super_block {
63 unsigned char xs_magic[4];
68 unsigned char xs_uuid[16];
77 struct reiserfs_super_block {
78 __u32 rs_blocks_count;
81 __u32 rs_journal_block;
83 __u32 rs_orig_journal_size;
87 unsigned char rs_magic[12];
89 unsigned char rs_uuid[16];
93 struct jfs_super_block {
94 unsigned char js_magic[4];
101 unsigned char js_uuid[16];
102 unsigned char js_label[16];
103 unsigned char js_loguuid[16];
106 struct romfs_super_block {
107 unsigned char ros_magic[8];
109 unsigned char ros_volume[16];
112 struct cramfs_super_block {
127 struct swap_id_block {
128 /* unsigned char sws_boot[1024]; */
132 unsigned char sws_uuid[16];
134 unsigned char sws_pad[117];
138 /* Yucky misaligned values */
139 struct vfat_super_block {
140 /* 00*/ unsigned char vs_ignored[3];
141 /* 03*/ unsigned char vs_sysid[8];
142 /* 0b*/ unsigned char vs_sector_size[2];
143 /* 0d*/ __u8 vs_cluster_size;
144 /* 0e*/ __u16 vs_reserved;
145 /* 10*/ __u8 vs_fats;
146 /* 11*/ unsigned char vs_dir_entries[2];
147 /* 13*/ unsigned char vs_sectors[2];
148 /* 15*/ unsigned char vs_media;
149 /* 16*/ __u16 vs_fat_length;
150 /* 18*/ __u16 vs_secs_track;
151 /* 1a*/ __u16 vs_heads;
152 /* 1c*/ __u32 vs_hidden;
153 /* 20*/ __u32 vs_total_sect;
154 /* 24*/ __u32 vs_fat32_length;
155 /* 28*/ __u16 vs_flags;
156 /* 2a*/ __u8 vs_version[2];
157 /* 2c*/ __u32 vs_root_cluster;
158 /* 30*/ __u16 vs_insfo_sector;
159 /* 32*/ __u16 vs_backup_boot;
160 /* 34*/ __u16 vs_reserved2[6];
161 /* 40*/ unsigned char vs_unknown[3];
162 /* 43*/ unsigned char vs_serno[4];
163 /* 47*/ char vs_label[11];
164 /* 52*/ unsigned char vs_magic[8];
165 /* 5a*/ unsigned char vs_dummy2[164];
166 /*1fe*/ unsigned char vs_pmagic[2];
169 /* Yucky misaligned values */
170 struct msdos_super_block {
171 /* 00*/ unsigned char ms_ignored[3];
172 /* 03*/ unsigned char ms_sysid[8];
173 /* 0b*/ unsigned char ms_sector_size[2];
174 /* 0d*/ __u8 ms_cluster_size;
175 /* 0e*/ __u16 ms_reserved;
176 /* 10*/ __u8 ms_fats;
177 /* 11*/ unsigned char ms_dir_entries[2];
178 /* 13*/ unsigned char ms_sectors[2];
179 /* 15*/ unsigned char ms_media;
180 /* 16*/ __u16 ms_fat_length;
181 /* 18*/ __u16 ms_secs_track;
182 /* 1a*/ __u16 ms_heads;
183 /* 1c*/ __u32 ms_hidden;
184 /* 20*/ __u32 ms_total_sect;
185 /* 24*/ unsigned char ms_unknown[3];
186 /* 27*/ unsigned char ms_serno[4];
187 /* 2b*/ char ms_label[11];
188 /* 36*/ unsigned char ms_magic[8];
189 /* 3d*/ unsigned char ms_dummy2[192];
190 /*1fe*/ unsigned char ms_pmagic[2];
193 struct minix_super_block {
196 __u16 ms_imap_blocks;
197 __u16 ms_zmap_blocks;
198 __u16 ms_firstdatazone;
199 __u16 ms_log_zone_size;
201 unsigned char ms_magic[2];
206 struct mdp_superblock_s {
219 __u32 not_persistent;
225 struct hfs_super_block {
231 struct ocfs_volume_header {
232 unsigned char minor_version[4];
233 unsigned char major_version[4];
234 unsigned char signature[128];
236 unsigned char mount_len[2];
239 struct ocfs_volume_label {
240 unsigned char disk_lock[48];
242 unsigned char label_len[2];
243 unsigned char vol_id[16];
244 unsigned char vol_id_len[2];
247 #define ocfsmajor(o) ((__u32)o.major_version[0] \
248 + (((__u32) o.major_version[1]) << 8) \
249 + (((__u32) o.major_version[2]) << 16) \
250 + (((__u32) o.major_version[3]) << 24))
251 #define ocfslabellen(o) ((__u32)o.label_len[0] + (((__u32) o.label_len[1]) << 8))
252 #define ocfsmountlen(o) ((__u32)o.mount_len[0] + (((__u32) o.mount_len[1])<<8))
254 #define OCFS_MAGIC "OracleCFS"
256 struct ocfs2_super_block {
257 unsigned char signature[8];
258 unsigned char s_dummy1[184];
259 unsigned char s_dummy2[80];
261 unsigned char s_uuid[16];
264 #define OCFS2_MIN_BLOCKSIZE 512
265 #define OCFS2_MAX_BLOCKSIZE 4096
267 #define OCFS2_SUPER_BLOCK_BLKNO 2
269 #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
271 struct oracle_asm_disk_label {
277 #define ORACLE_ASM_DISK_LABEL_MARKED "ORCLDISK"
278 #define ORACLE_ASM_DISK_LABEL_OFFSET 32
280 #define ISODCL(from, to) (to - from + 1)
281 struct iso_volume_descriptor {
282 char type[ISODCL(1,1)]; /* 711 */
283 char id[ISODCL(2,6)];
284 char version[ISODCL(7,7)];
285 char data[ISODCL(8,2048)];
289 * Byte swap functions
292 #define _INLINE_ static __inline__
293 #else /* For Watcom C */
294 #define _INLINE_ static inline
297 static __u16 blkid_swab16(__u16 val);
298 static __u32 blkid_swab32(__u32 val);
299 static __u64 blkid_swab64(__u64 val);
301 #if ((defined __GNUC__) && \
302 (defined(__i386__) || defined(__i486__) || defined(__i586__)))
304 #define _BLKID_HAVE_ASM_BITOPS_
306 _INLINE_ __u32 blkid_swab32(__u32 val)
308 #ifdef EXT2FS_REQUIRE_486
309 __asm__("bswap %0" : "=r" (val) : "0" (val));
311 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
312 "rorl $16,%0\n\t" /* swap words */
313 "xchgb %b0,%h0" /* swap higher bytes */
320 _INLINE_ __u16 blkid_swab16(__u16 val)
322 __asm__("xchgb %b0,%h0" /* swap bytes */ \
328 _INLINE_ __u64 blkid_swab64(__u64 val)
330 return blkid_swab32(val >> 32) |
331 ( ((__u64)blkid_swab32((__u32)val)) << 32 );
335 #if !defined(_BLKID_HAVE_ASM_BITOPS_)
337 _INLINE_ __u16 blkid_swab16(__u16 val)
339 return (val >> 8) | (val << 8);
342 _INLINE_ __u32 blkid_swab32(__u32 val)
344 return (val>>24) | ((val>>8) & 0xFF00) |
345 ((val<<8) & 0xFF0000) | (val<<24);
348 _INLINE_ __u64 blkid_swab64(__u64 val)
350 return blkid_swab32(val >> 32) |
351 ( ((__u64)blkid_swab32((__u32)val)) << 32 );
357 #if __BYTE_ORDER == __BIG_ENDIAN
358 #define blkid_le16(x) blkid_swab16(x)
359 #define blkid_le32(x) blkid_swab32(x)
360 #define blkid_le64(x) blkid_swab64(x)
361 #define blkid_be16(x) (x)
362 #define blkid_be32(x) (x)
363 #define blkid_be64(x) (x)
365 #define blkid_le16(x) (x)
366 #define blkid_le32(x) (x)
367 #define blkid_le64(x) (x)
368 #define blkid_be16(x) blkid_swab16(x)
369 #define blkid_be32(x) blkid_swab32(x)
370 #define blkid_be64(x) blkid_swab64(x)
375 #endif /* _BLKID_PROBE_H */