libblkid-tiny/libblkid-tiny.h

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  */
  14 #ifndef _LIBBLKID_TINY_H
  15 #define _LIBBLKID_TINY_H
  16
  17 #include <libubox/list.h>
  18
  19 struct blkid_struct_probe;
  20
  21 /*
  22  * Filesystem / Raid magic strings
  23  */
  24 struct blkid_idmag
  25 {
  26         const char      *magic;         /* magic string */
  27         unsigned int    len;            /* length of magic */
  28
  29         long            kboff;          /* kilobyte offset of superblock */
  30         unsigned int    sboff;          /* byte offset within superblock */
  31 };
  32
  33 /*
  34  * Filesystem / Raid description
  35  */
  36 struct blkid_idinfo
  37 {
  38         const char      *name;          /* fs, raid or partition table name */
  39         int             usage;          /* BLKID_USAGE_* flag */
  40         int             flags;          /* BLKID_IDINFO_* flags */
  41         int             minsz;          /* minimal device size */
  42
  43                                         /* probe function */
  44         int             (*probefunc)(struct blkid_struct_probe *pr, const struct blkid_idmag *mag);
  45
  46         struct blkid_idmag      magics[];       /* NULL or array with magic strings */
  47 };
  48
  49 /* Smaller version of the struct provided in blkidP.h */
  50 struct blkid_struct_probe
  51 {
  52         const struct blkid_idinfo       *id;
  53         struct list_head                list;
  54
  55         int     fd;
  56         int     err;
  57         char    dev[32];
  58         char    uuid[64];
  59         char    label[256];
  60         char    version[64];
  61
  62         struct list_head        buffers;        /* list of buffers */
  63 };
  64
  65 struct blkid_struct_probe *blkid_new_probe(void);
  66 void blkid_free_probe(struct blkid_struct_probe *pr);
  67
  68 extern int probe_block(char *block, struct blkid_struct_probe *pr);
  69 extern int mkblkdev(void);
  70
  71 #endif /* _LIBBLKID_TINY_H */