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ea2384d3 FB |
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 | ||
27 | struct BlockDriver { | |
28 | const char *format_name; | |
29 | int instance_size; | |
30 | int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename); | |
83f64091 | 31 | int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags); |
ea2384d3 FB |
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); | |
e2731add | 36 | void (*bdrv_close)(BlockDriverState *bs); |
ea2384d3 FB |
37 | int (*bdrv_create)(const char *filename, int64_t total_sectors, |
38 | const char *backing_file, int flags); | |
7a6cba61 | 39 | void (*bdrv_flush)(BlockDriverState *bs); |
ea2384d3 FB |
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); | |
95389c86 | 43 | int (*bdrv_make_empty)(BlockDriverState *bs); |
83f64091 FB |
44 | /* aio */ |
45 | int (*bdrv_aio_new)(BlockDriverAIOCB *acb); | |
46 | int (*bdrv_aio_read)(BlockDriverAIOCB *acb, int64_t sector_num, | |
47 | uint8_t *buf, int nb_sectors); | |
48 | int (*bdrv_aio_write)(BlockDriverAIOCB *acb, int64_t sector_num, | |
49 | const uint8_t *buf, int nb_sectors); | |
50 | void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb); | |
51 | void (*bdrv_aio_delete)(BlockDriverAIOCB *acb); | |
52 | ||
53 | const char *protocol_name; | |
54 | int (*bdrv_pread)(BlockDriverState *bs, int64_t offset, | |
55 | uint8_t *buf, int count); | |
56 | int (*bdrv_pwrite)(BlockDriverState *bs, int64_t offset, | |
57 | const uint8_t *buf, int count); | |
58 | int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset); | |
59 | int64_t (*bdrv_getlength)(BlockDriverState *bs); | |
faea38e7 FB |
60 | int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num, |
61 | const uint8_t *buf, int nb_sectors); | |
62 | ||
63 | int (*bdrv_snapshot_create)(BlockDriverState *bs, | |
64 | QEMUSnapshotInfo *sn_info); | |
65 | int (*bdrv_snapshot_goto)(BlockDriverState *bs, | |
66 | const char *snapshot_id); | |
67 | int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id); | |
68 | int (*bdrv_snapshot_list)(BlockDriverState *bs, | |
69 | QEMUSnapshotInfo **psn_info); | |
70 | int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); | |
83f64091 | 71 | |
ea2384d3 FB |
72 | struct BlockDriver *next; |
73 | }; | |
74 | ||
75 | struct BlockDriverState { | |
83f64091 | 76 | int64_t total_sectors; /* XXX: will be suppressed */ |
ea2384d3 FB |
77 | int read_only; /* if true, the media is read only */ |
78 | int inserted; /* if true, the media is present */ | |
79 | int removable; /* if true, the media can be removed */ | |
80 | int locked; /* if true, the media cannot temporarily be ejected */ | |
81 | int encrypted; /* if true, the media is encrypted */ | |
82 | /* event callback when inserting/removing */ | |
83 | void (*change_cb)(void *opaque); | |
84 | void *change_opaque; | |
85 | ||
86 | BlockDriver *drv; | |
87 | void *opaque; | |
88 | ||
89 | int boot_sector_enabled; | |
90 | uint8_t boot_sector_data[512]; | |
91 | ||
92 | char filename[1024]; | |
93 | char backing_file[1024]; /* if non zero, the image is a diff of | |
94 | this file image */ | |
95 | int is_temporary; | |
96 | ||
97 | BlockDriverState *backing_hd; | |
83f64091 FB |
98 | /* sync read/write emulation */ |
99 | ||
100 | BlockDriverAIOCB *sync_aiocb; | |
ea2384d3 FB |
101 | |
102 | /* NOTE: the following infos are only hints for real hardware | |
103 | drivers. They are not used by the block driver */ | |
46d4767d | 104 | int cyls, heads, secs, translation; |
ea2384d3 FB |
105 | int type; |
106 | char device_name[32]; | |
107 | BlockDriverState *next; | |
108 | }; | |
109 | ||
83f64091 FB |
110 | struct BlockDriverAIOCB { |
111 | BlockDriverState *bs; | |
112 | BlockDriverCompletionFunc *cb; | |
113 | void *cb_opaque; | |
114 | ||
115 | void *opaque; /* driver opaque */ | |
116 | }; | |
117 | ||
95389c86 FB |
118 | void get_tmp_filename(char *filename, int size); |
119 | ||
ea2384d3 | 120 | #endif /* BLOCK_INT_H */ |