source: trunk/packages/xen-3.1/xen-3.1/tools/ioemu/block_int.h @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 3.2 KB
Line 
1/*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24#ifndef BLOCK_INT_H
25#define BLOCK_INT_H
26
27struct BlockDriver {
28    const char *format_name;
29    int instance_size;
30    int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
31    int (*bdrv_open)(BlockDriverState *bs, const char *filename);
32    int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, 
33                     uint8_t *buf, int nb_sectors);
34    int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, 
35                      const uint8_t *buf, int nb_sectors);
36    void (*bdrv_close)(BlockDriverState *bs);
37    int (*bdrv_create)(const char *filename, int64_t total_sectors, 
38                       const char *backing_file, int flags);
39    void (*bdrv_flush)(BlockDriverState *bs);
40    int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num,
41                             int nb_sectors, int *pnum);
42    int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
43    int (*bdrv_make_empty)(BlockDriverState *bs);
44    struct BlockDriver *next;
45};
46
47struct BlockDriverState {
48    int64_t total_sectors;
49    int read_only; /* if true, the media is read only */
50    int inserted; /* if true, the media is present */
51    int removable; /* if true, the media can be removed */
52    int locked;    /* if true, the media cannot temporarily be ejected */
53    int encrypted; /* if true, the media is encrypted */
54    /* event callback when inserting/removing */
55    void (*change_cb)(void *opaque);
56    void *change_opaque;
57
58    BlockDriver *drv;
59    void *opaque;
60
61    int boot_sector_enabled;
62    uint8_t boot_sector_data[512];
63
64    char filename[1024];
65    char backing_file[1024]; /* if non zero, the image is a diff of
66                                this file image */
67    int is_temporary;
68   
69    BlockDriverState *backing_hd;
70   
71    /* NOTE: the following infos are only hints for real hardware
72       drivers. They are not used by the block driver */
73    int cyls, heads, secs, translation;
74    int type;
75    char device_name[32];
76    BlockDriverState *next;
77};
78
79void get_tmp_filename(char *filename, int size);
80
81#endif /* BLOCK_INT_H */
Note: See TracBrowser for help on using the repository browser.