mirror of
https://github.com/systemd/systemd.git
synced 2024-11-05 23:51:28 +03:00
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*
|
|
* volume_id - reads filesystem label and uuid
|
|
*
|
|
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation version 2 of the License.
|
|
*/
|
|
|
|
#ifndef _VOLUME_ID_UTIL_
|
|
#define _VOLUME_ID_UTIL_
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <endian.h>
|
|
|
|
/* size of superblock buffer, reiserfs block is at 64k */
|
|
#define SB_BUFFER_SIZE 0x11000
|
|
/* size of seek buffer, FAT cluster is 32k max */
|
|
#define SEEK_BUFFER_SIZE 0x10000
|
|
|
|
/* probe volume for all known filesystems in specific order */
|
|
#define bswap16(x) (uint16_t) ((((uint16_t)(x) & 0x00ffu) << 8) | \
|
|
(((uint16_t)(x) & 0xff00u) >> 8))
|
|
|
|
#define bswap32(x) (uint32_t) ((((uint32_t)(x) & 0xff000000u) >> 24) | \
|
|
(((uint32_t)(x) & 0x00ff0000u) >> 8) | \
|
|
(((uint32_t)(x) & 0x0000ff00u) << 8) | \
|
|
(((uint32_t)(x) & 0x000000ffu) << 24))
|
|
|
|
#define bswap64(x) (uint64_t) ((((uint64_t)(x) & 0xff00000000000000ull) >> 56) | \
|
|
(((uint64_t)(x) & 0x00ff000000000000ull) >> 40) | \
|
|
(((uint64_t)(x) & 0x0000ff0000000000ull) >> 24) | \
|
|
(((uint64_t)(x) & 0x000000ff00000000ull) >> 8) | \
|
|
(((uint64_t)(x) & 0x00000000ff000000ull) << 8) | \
|
|
(((uint64_t)(x) & 0x0000000000ff0000ull) << 24) | \
|
|
(((uint64_t)(x) & 0x000000000000ff00ull) << 40) | \
|
|
(((uint64_t)(x) & 0x00000000000000ffull) << 56))
|
|
|
|
#ifdef __BYTE_ORDER
|
|
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
|
|
#define le16_to_cpu(x) (x)
|
|
#define le32_to_cpu(x) (x)
|
|
#define le64_to_cpu(x) (x)
|
|
#define be16_to_cpu(x) bswap16(x)
|
|
#define be32_to_cpu(x) bswap32(x)
|
|
#define cpu_to_le16(x) (x)
|
|
#define cpu_to_le32(x) (x)
|
|
#define cpu_to_be32(x) bswap32(x)
|
|
#elif (__BYTE_ORDER == __BIG_ENDIAN)
|
|
#define le16_to_cpu(x) bswap16(x)
|
|
#define le32_to_cpu(x) bswap32(x)
|
|
#define le64_to_cpu(x) bswap64(x)
|
|
#define be16_to_cpu(x) (x)
|
|
#define be32_to_cpu(x) (x)
|
|
#define cpu_to_le16(x) bswap16(x)
|
|
#define cpu_to_le32(x) bswap32(x)
|
|
#define cpu_to_be32(x) (x)
|
|
#endif
|
|
#endif /* __BYTE_ORDER */
|
|
|
|
enum uuid_format {
|
|
UUID_DCE_STRING,
|
|
UUID_DCE,
|
|
UUID_DOS,
|
|
UUID_NTFS,
|
|
UUID_HFS,
|
|
};
|
|
|
|
enum endian {
|
|
LE = 0,
|
|
BE = 1
|
|
};
|
|
|
|
extern void volume_id_set_unicode16(char *str, size_t len, const uint8_t *buf, enum endian endianess, size_t count);
|
|
extern void volume_id_set_usage(struct volume_id *id, enum volume_id_usage usage_id);
|
|
extern void volume_id_set_usage_part(struct volume_id_partition *part, enum volume_id_usage usage_id);
|
|
extern void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, size_t count);
|
|
extern void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count);
|
|
extern void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count);
|
|
extern void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, enum uuid_format format);
|
|
extern uint8_t *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len);
|
|
extern void volume_id_free_buffer(struct volume_id *id);
|
|
|
|
#endif /* _VOLUME_ID_UTIL_ */
|
|
|