1/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005-2006 Kay Sievers <kay.sievers@vrfy.org>
5 *
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.
9 */
10
11#ifndef _VOLUME_ID_UTIL_
12#define _VOLUME_ID_UTIL_
13
14#ifndef _GNU_SOURCE
15#define _GNU_SOURCE 1
16#endif
17
18#ifdef HAVE_CONFIG_H
19#  include <config.h>
20#endif
21
22#include <endian.h>
23#include <byteswap.h>
24#include <syslog.h>
25
26#define ALLOWED_CHARS				"#+-.:=@_"
27
28#ifndef PACKED
29#define PACKED				__attribute__((packed))
30#endif
31
32#define err(format, arg...)	volume_id_log_fn(LOG_ERR, __FILE__, __LINE__, format, ##arg)
33#define info(format, arg...)	volume_id_log_fn(LOG_INFO, __FILE__, __LINE__, format, ##arg)
34#ifdef DEBUG
35#define dbg(format, arg...)	volume_id_log_fn(LOG_DEBUG, __FILE__, __LINE__, format, ##arg)
36#else
37#define dbg(format, arg...)	do { } while (0)
38#endif
39
40/* size of superblock buffer, reiserfs block is at 64k */
41#define SB_BUFFER_SIZE				0x11000
42/* size of seek buffer, FAT cluster is 32k max */
43#define SEEK_BUFFER_SIZE			0x10000
44
45#ifdef __BYTE_ORDER
46#if (__BYTE_ORDER == __LITTLE_ENDIAN)
47#define le16_to_cpu(x) (x)
48#define le32_to_cpu(x) (x)
49#define le64_to_cpu(x) (x)
50#define be16_to_cpu(x) bswap_16(x)
51#define be32_to_cpu(x) bswap_32(x)
52#define cpu_to_le16(x) (x)
53#define cpu_to_le32(x) (x)
54#define cpu_to_be32(x) bswap_32(x)
55#elif (__BYTE_ORDER == __BIG_ENDIAN)
56#define le16_to_cpu(x) bswap_16(x)
57#define le32_to_cpu(x) bswap_32(x)
58#define le64_to_cpu(x) bswap_64(x)
59#define be16_to_cpu(x) (x)
60#define be32_to_cpu(x) (x)
61#define cpu_to_le16(x) bswap_16(x)
62#define cpu_to_le32(x) bswap_32(x)
63#define cpu_to_be32(x) (x)
64#endif
65#endif /* __BYTE_ORDER */
66
67enum uuid_format {
68	UUID_STRING,
69	UUID_HEX_STRING,
70	UUID_DCE,
71	UUID_DOS,
72	UUID_64BIT_LE,
73	UUID_64BIT_BE,
74	UUID_FOURINT,
75};
76
77enum endian {
78	LE = 0,
79	BE = 1
80};
81
82extern int volume_id_utf8_encoded_valid_unichar(const char *str);
83extern size_t volume_id_set_unicode16(uint8_t *str, size_t len, const uint8_t *buf, enum endian endianess, size_t count);
84extern void volume_id_set_usage(struct volume_id *id, enum volume_id_usage usage_id);
85extern void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, size_t count);
86extern void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count);
87extern void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count);
88extern void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format);
89extern uint8_t *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len);
90extern void volume_id_free_buffer(struct volume_id *id);
91
92#endif /* _VOLUME_ID_UTIL_ */
93