extras/volume_id/volume_id/volume_id.h

   1 /*
   2  * volume_id - reads partition label and uuid
   3  *
   4  * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   6  *      This library is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU Lesser General Public
   8  *      License as published by the Free Software Foundation; either
   9  *      version 2.1 of the License, or (at your option) any later version.
  10  *
  11  *      This library is distributed in the hope that it will be useful,
  12  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14  *      Lesser General Public License for more details.
  15  *
  16  *      You should have received a copy of the GNU Lesser General Public
  17  *      License along with this library; if not, write to the Free Software
  18  *      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20
  21 #ifndef _VOLUME_ID_H_
  22 #define _VOLUME_ID_H_
  23
  24 #define VOLUME_ID_VERSION               31
  25
  26 #define VOLUME_ID_LABEL_SIZE            64
  27 #define VOLUME_ID_UUID_SIZE             16
  28 #define VOLUME_ID_UUID_STRING_SIZE      37
  29 #define VOLUME_ID_FORMAT_SIZE           32
  30 #define VOLUME_ID_PATH_MAX              256
  31 #define VOLUME_ID_PARTITIONS_MAX        256
  32
  33 enum volume_id_usage {
  34         VOLUME_ID_UNUSED,
  35         VOLUME_ID_UNPROBED,
  36         VOLUME_ID_OTHER,
  37         VOLUME_ID_FILESYSTEM,
  38         VOLUME_ID_PARTITIONTABLE,
  39         VOLUME_ID_RAID,
  40         VOLUME_ID_DISKLABEL,
  41 };
  42
  43 struct volume_id_partition {
  44         enum            volume_id_usage usage_id;
  45         char            *usage;
  46         char            *type;
  47         unsigned long long off;
  48         unsigned long long len;
  49         unsigned int partition_type_raw;
  50 };
  51
  52 struct volume_id {
  53         unsigned char   label_raw[VOLUME_ID_LABEL_SIZE];
  54         unsigned int    label_raw_len;
  55         char            label[VOLUME_ID_LABEL_SIZE+1];
  56         unsigned char   uuid_raw[VOLUME_ID_UUID_SIZE];
  57         char            uuid[VOLUME_ID_UUID_STRING_SIZE];
  58         enum            volume_id_usage usage_id;
  59         char            *usage;
  60         char            *type;
  61         char            type_version[VOLUME_ID_FORMAT_SIZE];
  62
  63         struct volume_id_partition *partitions;
  64         unsigned int    partition_count;
  65
  66         int             fd;
  67         unsigned char   *sbbuf;
  68         unsigned int    sbbuf_len;
  69         unsigned char   *seekbuf;
  70         unsigned long long seekbuf_off;
  71         unsigned int    seekbuf_len;
  72         int             fd_close;
  73 };
  74
  75 extern struct volume_id *volume_id_open_fd(int fd);
  76 extern struct volume_id *volume_id_open_node(const char *path);
  77 extern struct volume_id *volume_id_open_dev_t(dev_t devt);
  78 extern int volume_id_probe_all(struct volume_id *id, unsigned long long off, unsigned long long size);
  79 extern void volume_id_close(struct volume_id *id);
  80
  81 #endif