geom_dal.h revision 9663:ace9a2ac3683 
1/*
2    geom_dal.h -- parted device abstraction layer
3    Copyright (C) 2001, 2002, 2007 Free Software Foundation, Inc.
4
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 3 of the License, or
8    (at your option) any later version.
9
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14
15    You should have received a copy of the GNU General Public License
16    along with this program.  If not, see <http://www.gnu.org/licenses/>.
17*/
18
19#ifndef GEOM_DAL_H
20#define GEOM_DAL_H
21
22#include <parted/parted.h>
23
24#if DYNAMIC_LOADING || !DISCOVER_ONLY
25
26#include <sys/stat.h>
27
28typedef unsigned long blk_t;
29
30struct dal_ops;
31
32struct _dal {
33    struct dal_ops *ops;
34    const void *dev;
35    size_t block_size;
36    int flags;
37    void *data;
38    blk_t len;
39};
40
41typedef struct _dal dal_t;
42
43struct dal_ops {
44    blk_t (*len)(dal_t *);
45    int (*read)(dal_t *, void *, blk_t, blk_t);
46    int (*write)(dal_t *, void *, blk_t, blk_t);
47    int (*sync)(dal_t *);
48    int (*flags)(dal_t *);
49    int (*equals)(dal_t *, dal_t *);
50    int (*stat)(dal_t *, struct stat *);
51    dev_t (*dev)(dal_t *);
52};
53
54extern dal_t *geom_dal_create(PedGeometry *geom, size_t block_size, int flags);
55extern int geom_dal_reopen(dal_t *dal, int flags);
56extern void geom_dal_free(dal_t *dal);
57
58#endif
59
60#endif
61