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ea2384d3 FB |
1 | /* |
2 | * QEMU System Emulator block driver | |
5fafdf24 | 3 | * |
ea2384d3 | 4 | * Copyright (c) 2003 Fabrice Bellard |
5fafdf24 | 5 | * |
ea2384d3 FB |
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 | ||
faf07963 PB |
27 | #include "block.h" |
28 | ||
ec36ba14 TS |
29 | #define BLOCK_FLAG_ENCRYPT 1 |
30 | #define BLOCK_FLAG_COMPRESS 2 | |
31 | #define BLOCK_FLAG_COMPAT6 4 | |
32 | ||
6bbff9a0 AL |
33 | typedef struct AIOPool { |
34 | void (*cancel)(BlockDriverAIOCB *acb); | |
35 | int aiocb_size; | |
36 | BlockDriverAIOCB *free_aiocb; | |
37 | } AIOPool; | |
38 | ||
ea2384d3 FB |
39 | struct BlockDriver { |
40 | const char *format_name; | |
41 | int instance_size; | |
42 | int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename); | |
83f64091 | 43 | int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags); |
5fafdf24 | 44 | int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 | 45 | uint8_t *buf, int nb_sectors); |
5fafdf24 | 46 | int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 | 47 | const uint8_t *buf, int nb_sectors); |
e2731add | 48 | void (*bdrv_close)(BlockDriverState *bs); |
5fafdf24 | 49 | int (*bdrv_create)(const char *filename, int64_t total_sectors, |
ea2384d3 | 50 | const char *backing_file, int flags); |
7a6cba61 | 51 | void (*bdrv_flush)(BlockDriverState *bs); |
ea2384d3 FB |
52 | int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num, |
53 | int nb_sectors, int *pnum); | |
54 | int (*bdrv_set_key)(BlockDriverState *bs, const char *key); | |
95389c86 | 55 | int (*bdrv_make_empty)(BlockDriverState *bs); |
83f64091 | 56 | /* aio */ |
ce1a14dc PB |
57 | BlockDriverAIOCB *(*bdrv_aio_read)(BlockDriverState *bs, |
58 | int64_t sector_num, uint8_t *buf, int nb_sectors, | |
59 | BlockDriverCompletionFunc *cb, void *opaque); | |
60 | BlockDriverAIOCB *(*bdrv_aio_write)(BlockDriverState *bs, | |
61 | int64_t sector_num, const uint8_t *buf, int nb_sectors, | |
62 | BlockDriverCompletionFunc *cb, void *opaque); | |
83f64091 | 63 | void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb); |
ce1a14dc | 64 | int aiocb_size; |
83f64091 FB |
65 | |
66 | const char *protocol_name; | |
83f64091 FB |
67 | int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset); |
68 | int64_t (*bdrv_getlength)(BlockDriverState *bs); | |
5fafdf24 | 69 | int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
70 | const uint8_t *buf, int nb_sectors); |
71 | ||
5fafdf24 | 72 | int (*bdrv_snapshot_create)(BlockDriverState *bs, |
faea38e7 | 73 | QEMUSnapshotInfo *sn_info); |
5fafdf24 | 74 | int (*bdrv_snapshot_goto)(BlockDriverState *bs, |
faea38e7 FB |
75 | const char *snapshot_id); |
76 | int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id); | |
5fafdf24 | 77 | int (*bdrv_snapshot_list)(BlockDriverState *bs, |
faea38e7 FB |
78 | QEMUSnapshotInfo **psn_info); |
79 | int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); | |
83f64091 | 80 | |
19cb3738 FB |
81 | /* removable device specific */ |
82 | int (*bdrv_is_inserted)(BlockDriverState *bs); | |
83 | int (*bdrv_media_changed)(BlockDriverState *bs); | |
84 | int (*bdrv_eject)(BlockDriverState *bs, int eject_flag); | |
85 | int (*bdrv_set_locked)(BlockDriverState *bs, int locked); | |
3b46e624 | 86 | |
985a03b0 TS |
87 | /* to control generic scsi devices */ |
88 | int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf); | |
04eeb8b6 AL |
89 | int (*bdrv_sg_send_command)(BlockDriverState *bs, void *buf, int count); |
90 | int (*bdrv_sg_recv_response)(BlockDriverState *bs, void *buf, int count); | |
91 | BlockDriverAIOCB *(*bdrv_sg_aio_read)(BlockDriverState *bs, | |
92 | void *buf, int count, | |
93 | BlockDriverCompletionFunc *cb, | |
94 | void *opaque); | |
95 | BlockDriverAIOCB *(*bdrv_sg_aio_write)(BlockDriverState *bs, | |
96 | void *buf, int count, | |
97 | BlockDriverCompletionFunc *cb, | |
98 | void *opaque); | |
985a03b0 | 99 | |
6bbff9a0 | 100 | AIOPool aio_pool; |
ea2384d3 FB |
101 | struct BlockDriver *next; |
102 | }; | |
103 | ||
104 | struct BlockDriverState { | |
d15a771d FB |
105 | int64_t total_sectors; /* if we are reading a disk image, give its |
106 | size in sectors */ | |
ea2384d3 | 107 | int read_only; /* if true, the media is read only */ |
ea2384d3 FB |
108 | int removable; /* if true, the media can be removed */ |
109 | int locked; /* if true, the media cannot temporarily be ejected */ | |
110 | int encrypted; /* if true, the media is encrypted */ | |
c0f4ce77 | 111 | int valid_key; /* if true, a valid encryption key has been set */ |
985a03b0 | 112 | int sg; /* if true, the device is a /dev/sg* */ |
ea2384d3 FB |
113 | /* event callback when inserting/removing */ |
114 | void (*change_cb)(void *opaque); | |
115 | void *change_opaque; | |
116 | ||
19cb3738 | 117 | BlockDriver *drv; /* NULL means no media */ |
ea2384d3 FB |
118 | void *opaque; |
119 | ||
ea2384d3 FB |
120 | char filename[1024]; |
121 | char backing_file[1024]; /* if non zero, the image is a diff of | |
122 | this file image */ | |
123 | int is_temporary; | |
19cb3738 FB |
124 | int media_changed; |
125 | ||
ea2384d3 | 126 | BlockDriverState *backing_hd; |
ce1a14dc | 127 | /* async read/write emulation */ |
83f64091 | 128 | |
ce1a14dc | 129 | void *sync_aiocb; |
3b46e624 | 130 | |
a36e69dd TS |
131 | /* I/O stats (display with "info blockstats"). */ |
132 | uint64_t rd_bytes; | |
133 | uint64_t wr_bytes; | |
134 | uint64_t rd_ops; | |
135 | uint64_t wr_ops; | |
136 | ||
71d0770c AL |
137 | /* Whether the disk can expand beyond total_sectors */ |
138 | int growable; | |
139 | ||
ea2384d3 FB |
140 | /* NOTE: the following infos are only hints for real hardware |
141 | drivers. They are not used by the block driver */ | |
46d4767d | 142 | int cyls, heads, secs, translation; |
ea2384d3 FB |
143 | int type; |
144 | char device_name[32]; | |
145 | BlockDriverState *next; | |
b0a7b120 | 146 | void *private; |
ea2384d3 FB |
147 | }; |
148 | ||
83f64091 | 149 | struct BlockDriverAIOCB { |
6bbff9a0 | 150 | AIOPool *pool; |
83f64091 FB |
151 | BlockDriverState *bs; |
152 | BlockDriverCompletionFunc *cb; | |
ce1a14dc PB |
153 | void *opaque; |
154 | BlockDriverAIOCB *next; | |
83f64091 FB |
155 | }; |
156 | ||
95389c86 FB |
157 | void get_tmp_filename(char *filename, int size); |
158 | ||
6bbff9a0 AL |
159 | void aio_pool_init(AIOPool *pool, int aiocb_size, |
160 | void (*cancel)(BlockDriverAIOCB *acb)); | |
161 | ||
ce1a14dc PB |
162 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
163 | void *opaque); | |
6bbff9a0 AL |
164 | void *qemu_aio_get_pool(AIOPool *pool, BlockDriverState *bs, |
165 | BlockDriverCompletionFunc *cb, void *opaque); | |
ce1a14dc PB |
166 | void qemu_aio_release(void *p); |
167 | ||
7ee930d0 | 168 | extern BlockDriverState *bdrv_first; |
faf07963 | 169 | |
ea2384d3 | 170 | #endif /* BLOCK_INT_H */ |