2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
11 #ifndef _VOLUME_ID_UTIL_
12 #define _VOLUME_ID_UTIL_
24 /* size of superblock buffer, reiserfs block is at 64k */
25 #define SB_BUFFER_SIZE 0x11000
26 /* size of seek buffer, FAT cluster is 32k max */
27 #define SEEK_BUFFER_SIZE 0x10000
29 /* probe volume for all known filesystems in specific order */
30 #define bswap16(x) (uint16_t) ((((uint16_t)(x) & 0x00ffu) << 8) | \
31 (((uint16_t)(x) & 0xff00u) >> 8))
33 #define bswap32(x) (uint32_t) ((((uint32_t)(x) & 0xff000000u) >> 24) | \
34 (((uint32_t)(x) & 0x00ff0000u) >> 8) | \
35 (((uint32_t)(x) & 0x0000ff00u) << 8) | \
36 (((uint32_t)(x) & 0x000000ffu) << 24))
38 #define bswap64(x) (uint64_t) ((((uint64_t)(x) & 0xff00000000000000ull) >> 56) | \
39 (((uint64_t)(x) & 0x00ff000000000000ull) >> 40) | \
40 (((uint64_t)(x) & 0x0000ff0000000000ull) >> 24) | \
41 (((uint64_t)(x) & 0x000000ff00000000ull) >> 8) | \
42 (((uint64_t)(x) & 0x00000000ff000000ull) << 8) | \
43 (((uint64_t)(x) & 0x0000000000ff0000ull) << 24) | \
44 (((uint64_t)(x) & 0x000000000000ff00ull) << 40) | \
45 (((uint64_t)(x) & 0x00000000000000ffull) << 56))
48 #if (__BYTE_ORDER == __LITTLE_ENDIAN)
49 #define le16_to_cpu(x) (x)
50 #define le32_to_cpu(x) (x)
51 #define le64_to_cpu(x) (x)
52 #define be16_to_cpu(x) bswap16(x)
53 #define be32_to_cpu(x) bswap32(x)
54 #define cpu_to_le16(x) (x)
55 #define cpu_to_le32(x) (x)
56 #define cpu_to_be32(x) bswap32(x)
57 #elif (__BYTE_ORDER == __BIG_ENDIAN)
58 #define le16_to_cpu(x) bswap16(x)
59 #define le32_to_cpu(x) bswap32(x)
60 #define le64_to_cpu(x) bswap64(x)
61 #define be16_to_cpu(x) (x)
62 #define be32_to_cpu(x) (x)
63 #define cpu_to_le16(x) bswap16(x)
64 #define cpu_to_le32(x) bswap32(x)
65 #define cpu_to_be32(x) (x)
67 #endif /* __BYTE_ORDER */
82 extern void volume_id_set_unicode16(char *str, size_t len, const uint8_t *buf, enum endian endianess, size_t count);
83 extern void volume_id_set_usage(struct volume_id *id, enum volume_id_usage usage_id);
84 extern void volume_id_set_usage_part(struct volume_id_partition *part, enum volume_id_usage usage_id);
85 extern void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, size_t count);
86 extern void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count);
87 extern void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count);
88 extern void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, enum uuid_format format);
89 extern uint8_t *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len);
90 extern void volume_id_free_buffer(struct volume_id *id);
92 #endif /* _VOLUME_ID_UTIL_ */