avoid signed<->unsigned warning
[oweals/busybox.git] / e2fsprogs / blkid / probe.h
1 /*
2  * probe.h - constants and on-disk structures for extracting device data
3  *
4  * Copyright (C) 1999 by Andries Brouwer
5  * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
6  * Copyright (C) 2001 by Andreas Dilger
7  *
8  * %Begin-Header%
9  * This file may be redistributed under the terms of the
10  * GNU Lesser General Public License.
11  * %End-Header%
12  */
13
14 #ifndef _BLKID_PROBE_H
15 #define _BLKID_PROBE_H
16
17 #include <linux/types.h>
18
19 struct blkid_magic;
20
21 typedef int (*blkid_probe_t)(int fd, blkid_cache cache, blkid_dev dev,
22                              const struct blkid_magic *id, unsigned char *buf);
23
24 struct blkid_magic {
25         const char      *bim_type;      /* type name for this magic */
26         long            bim_kboff;      /* kilobyte offset of superblock */
27         unsigned        bim_sboff;      /* byte offset within superblock */
28         unsigned        bim_len;        /* length of magic */
29         const char      *bim_magic;     /* magic string */
30         blkid_probe_t   bim_probe;      /* probe function */
31 };
32
33 /*
34  * Structures for each of the content types we want to extract information
35  * from.  We do not necessarily need the magic field here, because we have
36  * already identified the content type before we get this far.  It may still
37  * be useful if there are probe functions which handle multiple content types.
38  */
39 struct ext2_super_block {
40         __u32           s_inodes_count;
41         __u32           s_blocks_count;
42         __u32           s_r_blocks_count;
43         __u32           s_free_blocks_count;
44         __u32           s_free_inodes_count;
45         __u32           s_first_data_block;
46         __u32           s_log_block_size;
47         __u32           s_dummy3[7];
48         unsigned char   s_magic[2];
49         __u16           s_state;
50         __u32           s_dummy5[8];
51         __u32           s_feature_compat;
52         __u32           s_feature_incompat;
53         __u32           s_feature_ro_compat;
54         unsigned char   s_uuid[16];
55         char       s_volume_name[16];
56 };
57 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL         0x00000004
58 #define EXT3_FEATURE_INCOMPAT_RECOVER           0x00000004
59 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV       0x00000008
60
61 struct xfs_super_block {
62         unsigned char   xs_magic[4];
63         __u32           xs_blocksize;
64         __u64           xs_dblocks;
65         __u64           xs_rblocks;
66         __u32           xs_dummy1[2];
67         unsigned char   xs_uuid[16];
68         __u32           xs_dummy2[15];
69         char            xs_fname[12];
70         __u32           xs_dummy3[2];
71         __u64           xs_icount;
72         __u64           xs_ifree;
73         __u64           xs_fdblocks;
74 };
75
76 struct reiserfs_super_block {
77         __u32           rs_blocks_count;
78         __u32           rs_free_blocks;
79         __u32           rs_root_block;
80         __u32           rs_journal_block;
81         __u32           rs_journal_dev;
82         __u32           rs_orig_journal_size;
83         __u32           rs_dummy2[5];
84         __u16           rs_blocksize;
85         __u16           rs_dummy3[3];
86         unsigned char   rs_magic[12];
87         __u32           rs_dummy4[5];
88         unsigned char   rs_uuid[16];
89         char            rs_label[16];
90 };
91
92 struct jfs_super_block {
93         unsigned char   js_magic[4];
94         __u32           js_version;
95         __u64           js_size;
96         __u32           js_bsize;
97         __u32           js_dummy1;
98         __u32           js_pbsize;
99         __u32           js_dummy2[27];
100         unsigned char   js_uuid[16];
101         unsigned char   js_label[16];
102         unsigned char   js_loguuid[16];
103 };
104
105 struct romfs_super_block {
106         unsigned char   ros_magic[8];
107         __u32           ros_dummy1[2];
108         unsigned char   ros_volume[16];
109 };
110
111 struct swap_id_block {
112 /*      unsigned char   sws_boot[1024]; */
113         __u32           sws_version;
114         __u32           sws_lastpage;
115         __u32           sws_nrbad;
116         unsigned char   sws_uuid[16];
117         unsigned char   sws_volume[16];
118         unsigned char   sws_pad[117];
119         __u32           sws_badpg;
120 };
121
122 /* Yucky misaligned values */
123 struct vfat_super_block {
124 /* 00*/ unsigned char   vs_ignored[3];
125 /* 03*/ unsigned char   vs_sysid[8];
126 /* 0b*/ unsigned char   vs_sector_size[2];
127 /* 0d*/ __u8            vs_cluster_size;
128 /* 0e*/ __u16           vs_reserved;
129 /* 10*/ __u8            vs_fats;
130 /* 11*/ unsigned char   vs_dir_entries[2];
131 /* 13*/ unsigned char   vs_sectors[2];
132 /* 15*/ unsigned char   vs_media;
133 /* 16*/ __u16           vs_fat_length;
134 /* 18*/ __u16           vs_secs_track;
135 /* 1a*/ __u16           vs_heads;
136 /* 1c*/ __u32           vs_hidden;
137 /* 20*/ __u32           vs_total_sect;
138 /* 24*/ __u32           vs_fat32_length;
139 /* 28*/ __u16           vs_flags;
140 /* 2a*/ __u8            vs_version[2];
141 /* 2c*/ __u32           vs_root_cluster;
142 /* 30*/ __u16           vs_insfo_sector;
143 /* 32*/ __u16           vs_backup_boot;
144 /* 34*/ __u16           vs_reserved2[6];
145 /* 40*/ unsigned char   vs_unknown[3];
146 /* 43*/ unsigned char   vs_serno[4];
147 /* 47*/ char            vs_label[11];
148 /* 52*/ unsigned char   vs_magic[8];
149 /* 5a*/ unsigned char   vs_dummy2[164];
150 /*1fe*/ unsigned char   vs_pmagic[2];
151 };
152
153 /* Yucky misaligned values */
154 struct msdos_super_block {
155 /* 00*/ unsigned char   ms_ignored[3];
156 /* 03*/ unsigned char   ms_sysid[8];
157 /* 0b*/ unsigned char   ms_sector_size[2];
158 /* 0d*/ __u8            ms_cluster_size;
159 /* 0e*/ __u16           ms_reserved;
160 /* 10*/ __u8            ms_fats;
161 /* 11*/ unsigned char   ms_dir_entries[2];
162 /* 13*/ unsigned char   ms_sectors[2];
163 /* 15*/ unsigned char   ms_media;
164 /* 16*/ __u16           ms_fat_length;
165 /* 18*/ __u16           ms_secs_track;
166 /* 1a*/ __u16           ms_heads;
167 /* 1c*/ __u32           ms_hidden;
168 /* 20*/ __u32           ms_total_sect;
169 /* 24*/ unsigned char   ms_unknown[3];
170 /* 27*/ unsigned char   ms_serno[4];
171 /* 2b*/ char            ms_label[11];
172 /* 36*/ unsigned char   ms_magic[8];
173 /* 3d*/ unsigned char   ms_dummy2[192];
174 /*1fe*/ unsigned char   ms_pmagic[2];
175 };
176
177 struct minix_super_block {
178         __u16           ms_ninodes;
179         __u16           ms_nzones;
180         __u16           ms_imap_blocks;
181         __u16           ms_zmap_blocks;
182         __u16           ms_firstdatazone;
183         __u16           ms_log_zone_size;
184         __u32           ms_max_size;
185         unsigned char   ms_magic[2];
186         __u16           ms_state;
187         __u32           ms_zones;
188 };
189
190 struct mdp_superblock_s {
191         __u32 md_magic;
192         __u32 major_version;
193         __u32 minor_version;
194         __u32 patch_version;
195         __u32 gvalid_words;
196         __u32 set_uuid0;
197         __u32 ctime;
198         __u32 level;
199         __u32 size;
200         __u32 nr_disks;
201         __u32 raid_disks;
202         __u32 md_minor;
203         __u32 not_persistent;
204         __u32 set_uuid1;
205         __u32 set_uuid2;
206         __u32 set_uuid3;
207 };
208
209 struct hfs_super_block {
210         char    h_magic[2];
211         char    h_dummy[18];
212         __u32   h_blksize;
213 };
214
215 struct ocfs_volume_header {
216         unsigned char   minor_version[4];
217         unsigned char   major_version[4];
218         unsigned char   signature[128];
219         unsigned char  mount[128];
220         unsigned char  mount_len[2];
221 };
222
223 struct ocfs_volume_label {
224         unsigned char   disk_lock[48];
225         unsigned char   label[64];
226         unsigned char   label_len[2];
227         unsigned char  vol_id[16];
228         unsigned char  vol_id_len[2];
229 };
230
231 #define ocfsmajor(o) ((__u32)o.major_version[0] \
232                    + (((__u32) o.major_version[1]) << 8) \
233                    + (((__u32) o.major_version[2]) << 16) \
234                    + (((__u32) o.major_version[3]) << 24))
235 #define ocfslabellen(o) ((__u32)o.label_len[0] + (((__u32) o.label_len[1]) << 8))
236 #define ocfsmountlen(o) ((__u32)o.mount_len[0] + (((__u32) o.mount_len[1])<<8))
237
238 #define OCFS_MAGIC "OracleCFS"
239
240 struct ocfs2_super_block {
241         unsigned char  signature[8];
242         unsigned char  s_dummy1[184];
243         unsigned char  s_dummy2[80];
244         unsigned char  s_label[64];
245         unsigned char  s_uuid[16];
246 };
247
248 #define OCFS2_MIN_BLOCKSIZE             512
249 #define OCFS2_MAX_BLOCKSIZE             4096
250
251 #define OCFS2_SUPER_BLOCK_BLKNO         2
252
253 #define OCFS2_SUPER_BLOCK_SIGNATURE     "OCFSV2"
254
255 struct oracle_asm_disk_label {
256         char dummy[32];
257         char dl_tag[8];
258         char dl_id[24];
259 };
260
261 #define ORACLE_ASM_DISK_LABEL_MARKED    "ORCLDISK"
262 #define ORACLE_ASM_DISK_LABEL_OFFSET    32
263
264 #define ISODCL(from, to) (to - from + 1)
265 struct iso_volume_descriptor {
266         char type[ISODCL(1,1)]; /* 711 */
267         char id[ISODCL(2,6)];
268         char version[ISODCL(7,7)];
269         char data[ISODCL(8,2048)];
270 };
271
272 /*
273  * Byte swap functions
274  */
275 #ifdef __GNUC__
276 #define _INLINE_ static __inline__
277 #else                           /* For Watcom C */
278 #define _INLINE_ static inline
279 #endif
280
281 static __u16 blkid_swab16(__u16 val);
282 static __u32 blkid_swab32(__u32 val);
283 static __u64 blkid_swab64(__u64 val);
284
285 #if ((defined __GNUC__) && \
286      (defined(__i386__) || defined(__i486__) || defined(__i586__)))
287
288 #define _BLKID_HAVE_ASM_BITOPS_
289
290 _INLINE_ __u32 blkid_swab32(__u32 val)
291 {
292 #ifdef EXT2FS_REQUIRE_486
293         __asm__("bswap %0" : "=r" (val) : "0" (val));
294 #else
295         __asm__("xchgb %b0,%h0\n\t"     /* swap lower bytes     */
296                 "rorl $16,%0\n\t"       /* swap words           */
297                 "xchgb %b0,%h0"         /* swap higher bytes    */
298                 :"=q" (val)
299                 : "0" (val));
300 #endif
301         return val;
302 }
303
304 _INLINE_ __u16 blkid_swab16(__u16 val)
305 {
306         __asm__("xchgb %b0,%h0"         /* swap bytes           */ \
307                 : "=q" (val) \
308                 :  "0" (val)); \
309                 return val;
310 }
311
312 _INLINE_ __u64 blkid_swab64(__u64 val)
313 {
314         return (blkid_swab32(val >> 32) |
315                 (((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32));
316 }
317 #endif
318
319 #if !defined(_BLKID_HAVE_ASM_BITOPS_)
320
321 _INLINE_  __u16 blkid_swab16(__u16 val)
322 {
323         return (val >> 8) | (val << 8);
324 }
325
326 _INLINE_ __u32 blkid_swab32(__u32 val)
327 {
328         return ((val>>24) | ((val>>8)&0xFF00) |
329                 ((val<<8)&0xFF0000) | (val<<24));
330 }
331
332 _INLINE_ __u64 blkid_swab64(__u64 val)
333 {
334         return (blkid_swab32(val >> 32) |
335                 (((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32));
336 }
337 #endif
338
339
340
341 #if  __BYTE_ORDER == __BIG_ENDIAN
342 #define blkid_le16(x) blkid_swab16(x)
343 #define blkid_le32(x) blkid_swab32(x)
344 #define blkid_le64(x) blkid_swab64(x)
345 #define blkid_be16(x) (x)
346 #define blkid_be32(x) (x)
347 #define blkid_be64(x) (x)
348 #else
349 #define blkid_le16(x) (x)
350 #define blkid_le32(x) (x)
351 #define blkid_le64(x) (x)
352 #define blkid_be16(x) blkid_swab16(x)
353 #define blkid_be32(x) blkid_swab32(x)
354 #define blkid_be64(x) blkid_swab64(x)
355 #endif
356
357 #undef _INLINE_
358
359 #endif /* _BLKID_PROBE_H */