volume_id.h revision eb064000ca62e1f854db88c5011f308492d526d6
/*
* volume_id - reads partition label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _VOLUME_ID_H_
#define _VOLUME_ID_H_
#define VOLUME_ID_VERSION 28
#define VOLUME_ID_LABEL_SIZE 64
#define VOLUME_ID_UUID_SIZE 16
#define VOLUME_ID_UUID_STRING_SIZE 37
#define VOLUME_ID_FORMAT_SIZE 32
#define VOLUME_ID_PATH_MAX 256
#define VOLUME_ID_PARTITIONS_MAX 256
enum volume_id_usage {
VOLUME_ID_UNUSED,
VOLUME_ID_UNPROBED,
VOLUME_ID_OTHER,
VOLUME_ID_FILESYSTEM,
VOLUME_ID_PARTITIONTABLE,
VOLUME_ID_RAID,
};
enum volume_id_type {
VOLUME_ID_ALL,
VOLUME_ID_MSDOSPARTTABLE,
VOLUME_ID_MSDOSEXTENDED,
VOLUME_ID_SWAP,
VOLUME_ID_EXT2,
VOLUME_ID_EXT3,
VOLUME_ID_REISERFS,
VOLUME_ID_XFS,
VOLUME_ID_JFS,
VOLUME_ID_VFAT,
VOLUME_ID_UDF,
VOLUME_ID_ISO9660,
VOLUME_ID_NTFS,
VOLUME_ID_MACPARTMAP,
VOLUME_ID_HFS,
VOLUME_ID_HFSPLUS,
VOLUME_ID_UFS,
VOLUME_ID_LINUX_RAID,
VOLUME_ID_LVM1,
VOLUME_ID_LVM2,
VOLUME_ID_HPTRAID,
};
struct volume_id_partition {
enum volume_id_usage usage_id;
enum volume_id_type type_id;
char *type;
unsigned long long off;
unsigned long long len;
unsigned int partition_type_raw;
};
struct volume_id {
unsigned char label_raw[VOLUME_ID_LABEL_SIZE];
unsigned int label_raw_len;
char label[VOLUME_ID_LABEL_SIZE+1];
unsigned char uuid_raw[VOLUME_ID_UUID_SIZE];
char uuid[VOLUME_ID_UUID_STRING_SIZE];
enum volume_id_usage usage_id;
enum volume_id_type type_id;
char *type;
char type_version[VOLUME_ID_FORMAT_SIZE];
struct volume_id_partition *partitions;
unsigned int partition_count;
int fd;
unsigned char *sbbuf;
unsigned int sbbuf_len;
unsigned char *seekbuf;
unsigned long long seekbuf_off;
unsigned int seekbuf_len;
int fd_close;
};
/* open volume by already open file descriptor */
extern struct volume_id *volume_id_open_fd(int fd);
/* open volume by device node */
extern struct volume_id *volume_id_open_node(const char *path);
/* open volume by major/minor */
extern struct volume_id *volume_id_open_dev_t(dev_t devt);
/* probe volume for filesystem type and try to read label/uuid */
extern int volume_id_probe(struct volume_id *id, enum volume_id_type type,
unsigned long long off, unsigned long long size);
/* free allocated device info */
extern void volume_id_close(struct volume_id *id);
#endif