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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 | 27 | #include "block.h" |
0e7e1989 | 28 | #include "qemu-option.h" |
1b7bdbc1 | 29 | #include "qemu-queue.h" |
faf07963 | 30 | |
ec36ba14 | 31 | #define BLOCK_FLAG_ENCRYPT 1 |
ec36ba14 TS |
32 | #define BLOCK_FLAG_COMPAT6 4 |
33 | ||
0e7e1989 KW |
34 | #define BLOCK_OPT_SIZE "size" |
35 | #define BLOCK_OPT_ENCRYPT "encryption" | |
36 | #define BLOCK_OPT_COMPAT6 "compat6" | |
37 | #define BLOCK_OPT_BACKING_FILE "backing_file" | |
38 | #define BLOCK_OPT_BACKING_FMT "backing_fmt" | |
73c632ed | 39 | #define BLOCK_OPT_CLUSTER_SIZE "cluster_size" |
a35e1c17 | 40 | #define BLOCK_OPT_PREALLOC "preallocation" |
0e7e1989 | 41 | |
6bbff9a0 AL |
42 | typedef struct AIOPool { |
43 | void (*cancel)(BlockDriverAIOCB *acb); | |
44 | int aiocb_size; | |
45 | BlockDriverAIOCB *free_aiocb; | |
46 | } AIOPool; | |
47 | ||
ea2384d3 FB |
48 | struct BlockDriver { |
49 | const char *format_name; | |
50 | int instance_size; | |
51 | int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename); | |
508c7cb3 | 52 | int (*bdrv_probe_device)(const char *filename); |
66f82cee KW |
53 | int (*bdrv_open)(BlockDriverState *bs, int flags); |
54 | int (*bdrv_file_open)(BlockDriverState *bs, const char *filename, int flags); | |
5fafdf24 | 55 | int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 | 56 | uint8_t *buf, int nb_sectors); |
5fafdf24 | 57 | int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, |
ea2384d3 | 58 | const uint8_t *buf, int nb_sectors); |
e2731add | 59 | void (*bdrv_close)(BlockDriverState *bs); |
0e7e1989 | 60 | int (*bdrv_create)(const char *filename, QEMUOptionParameter *options); |
205ef796 | 61 | int (*bdrv_flush)(BlockDriverState *bs); |
ea2384d3 FB |
62 | int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num, |
63 | int nb_sectors, int *pnum); | |
64 | int (*bdrv_set_key)(BlockDriverState *bs, const char *key); | |
95389c86 | 65 | int (*bdrv_make_empty)(BlockDriverState *bs); |
83f64091 | 66 | /* aio */ |
f141eafe AL |
67 | BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs, |
68 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 69 | BlockDriverCompletionFunc *cb, void *opaque); |
f141eafe AL |
70 | BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs, |
71 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, | |
ce1a14dc | 72 | BlockDriverCompletionFunc *cb, void *opaque); |
b2e12bc6 CH |
73 | BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs, |
74 | BlockDriverCompletionFunc *cb, void *opaque); | |
bb8bf76f CH |
75 | int (*bdrv_discard)(BlockDriverState *bs, int64_t sector_num, |
76 | int nb_sectors); | |
83f64091 | 77 | |
40b4f539 KW |
78 | int (*bdrv_aio_multiwrite)(BlockDriverState *bs, BlockRequest *reqs, |
79 | int num_reqs); | |
80 | int (*bdrv_merge_requests)(BlockDriverState *bs, BlockRequest* a, | |
81 | BlockRequest *b); | |
82 | ||
83 | ||
83f64091 | 84 | const char *protocol_name; |
83f64091 FB |
85 | int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset); |
86 | int64_t (*bdrv_getlength)(BlockDriverState *bs); | |
5fafdf24 | 87 | int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num, |
faea38e7 FB |
88 | const uint8_t *buf, int nb_sectors); |
89 | ||
5fafdf24 | 90 | int (*bdrv_snapshot_create)(BlockDriverState *bs, |
faea38e7 | 91 | QEMUSnapshotInfo *sn_info); |
5fafdf24 | 92 | int (*bdrv_snapshot_goto)(BlockDriverState *bs, |
faea38e7 FB |
93 | const char *snapshot_id); |
94 | int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id); | |
5fafdf24 | 95 | int (*bdrv_snapshot_list)(BlockDriverState *bs, |
faea38e7 | 96 | QEMUSnapshotInfo **psn_info); |
51ef6727 | 97 | int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs, |
98 | const char *snapshot_name); | |
faea38e7 | 99 | int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); |
83f64091 | 100 | |
45566e9c CH |
101 | int (*bdrv_save_vmstate)(BlockDriverState *bs, const uint8_t *buf, |
102 | int64_t pos, int size); | |
103 | int (*bdrv_load_vmstate)(BlockDriverState *bs, uint8_t *buf, | |
104 | int64_t pos, int size); | |
178e08a5 | 105 | |
756e6736 KW |
106 | int (*bdrv_change_backing_file)(BlockDriverState *bs, |
107 | const char *backing_file, const char *backing_fmt); | |
108 | ||
19cb3738 FB |
109 | /* removable device specific */ |
110 | int (*bdrv_is_inserted)(BlockDriverState *bs); | |
111 | int (*bdrv_media_changed)(BlockDriverState *bs); | |
112 | int (*bdrv_eject)(BlockDriverState *bs, int eject_flag); | |
113 | int (*bdrv_set_locked)(BlockDriverState *bs, int locked); | |
3b46e624 | 114 | |
985a03b0 TS |
115 | /* to control generic scsi devices */ |
116 | int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf); | |
221f715d AL |
117 | BlockDriverAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs, |
118 | unsigned long int req, void *buf, | |
119 | BlockDriverCompletionFunc *cb, void *opaque); | |
985a03b0 | 120 | |
0e7e1989 KW |
121 | /* List of options for creating images, terminated by name == NULL */ |
122 | QEMUOptionParameter *create_options; | |
123 | ||
5eb45639 | 124 | |
9ac228e0 KW |
125 | /* |
126 | * Returns 0 for completed check, -errno for internal errors. | |
127 | * The check results are stored in result. | |
128 | */ | |
129 | int (*bdrv_check)(BlockDriverState* bs, BdrvCheckResult *result); | |
e97fc193 | 130 | |
8b9b0cc2 KW |
131 | void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event); |
132 | ||
336c1c12 KW |
133 | /* |
134 | * Returns 1 if newly created images are guaranteed to contain only | |
135 | * zeros, 0 otherwise. | |
136 | */ | |
137 | int (*bdrv_has_zero_init)(BlockDriverState *bs); | |
12c09b8c | 138 | |
8a22f02a | 139 | QLIST_ENTRY(BlockDriver) list; |
ea2384d3 FB |
140 | }; |
141 | ||
142 | struct BlockDriverState { | |
d15a771d FB |
143 | int64_t total_sectors; /* if we are reading a disk image, give its |
144 | size in sectors */ | |
ea2384d3 | 145 | int read_only; /* if true, the media is read only */ |
4dca4b63 NS |
146 | int keep_read_only; /* if true, the media was requested to stay read only */ |
147 | int open_flags; /* flags used to open the file, re-used for re-open */ | |
ea2384d3 FB |
148 | int removable; /* if true, the media can be removed */ |
149 | int locked; /* if true, the media cannot temporarily be ejected */ | |
4be9762a | 150 | int tray_open; /* if true, the virtual tray is open */ |
ea2384d3 | 151 | int encrypted; /* if true, the media is encrypted */ |
c0f4ce77 | 152 | int valid_key; /* if true, a valid encryption key has been set */ |
985a03b0 | 153 | int sg; /* if true, the device is a /dev/sg* */ |
ea2384d3 FB |
154 | /* event callback when inserting/removing */ |
155 | void (*change_cb)(void *opaque); | |
156 | void *change_opaque; | |
157 | ||
19cb3738 | 158 | BlockDriver *drv; /* NULL means no media */ |
ea2384d3 FB |
159 | void *opaque; |
160 | ||
18846dee MA |
161 | DeviceState *peer; |
162 | ||
ea2384d3 FB |
163 | char filename[1024]; |
164 | char backing_file[1024]; /* if non zero, the image is a diff of | |
165 | this file image */ | |
5eb45639 | 166 | char backing_format[16]; /* if non-zero and backing_file exists */ |
ea2384d3 | 167 | int is_temporary; |
19cb3738 FB |
168 | int media_changed; |
169 | ||
ea2384d3 | 170 | BlockDriverState *backing_hd; |
66f82cee KW |
171 | BlockDriverState *file; |
172 | ||
ce1a14dc | 173 | /* async read/write emulation */ |
83f64091 | 174 | |
ce1a14dc | 175 | void *sync_aiocb; |
3b46e624 | 176 | |
a36e69dd TS |
177 | /* I/O stats (display with "info blockstats"). */ |
178 | uint64_t rd_bytes; | |
179 | uint64_t wr_bytes; | |
180 | uint64_t rd_ops; | |
181 | uint64_t wr_ops; | |
294cc35f | 182 | uint64_t wr_highest_sector; |
a36e69dd | 183 | |
71d0770c AL |
184 | /* Whether the disk can expand beyond total_sectors */ |
185 | int growable; | |
186 | ||
e268ca52 AL |
187 | /* the memory alignment required for the buffers handled by this driver */ |
188 | int buffer_alignment; | |
189 | ||
e900a7b7 CH |
190 | /* do we need to tell the quest if we have a volatile write cache? */ |
191 | int enable_write_cache; | |
192 | ||
ea2384d3 FB |
193 | /* NOTE: the following infos are only hints for real hardware |
194 | drivers. They are not used by the block driver */ | |
46d4767d | 195 | int cyls, heads, secs, translation; |
ea2384d3 | 196 | int type; |
abd7f68d | 197 | BlockErrorAction on_read_error, on_write_error; |
ea2384d3 | 198 | char device_name[32]; |
c6d22830 | 199 | unsigned long *dirty_bitmap; |
aaa0eb75 | 200 | int64_t dirty_count; |
1b7bdbc1 | 201 | QTAILQ_ENTRY(BlockDriverState) list; |
b0a7b120 | 202 | void *private; |
ea2384d3 FB |
203 | }; |
204 | ||
83f64091 | 205 | struct BlockDriverAIOCB { |
6bbff9a0 | 206 | AIOPool *pool; |
83f64091 FB |
207 | BlockDriverState *bs; |
208 | BlockDriverCompletionFunc *cb; | |
ce1a14dc PB |
209 | void *opaque; |
210 | BlockDriverAIOCB *next; | |
83f64091 FB |
211 | }; |
212 | ||
95389c86 FB |
213 | void get_tmp_filename(char *filename, int size); |
214 | ||
c16b5a2c CH |
215 | void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
216 | BlockDriverCompletionFunc *cb, void *opaque); | |
ce1a14dc PB |
217 | void qemu_aio_release(void *p); |
218 | ||
e268ca52 AL |
219 | void *qemu_blockalign(BlockDriverState *bs, size_t size); |
220 | ||
508c7cb3 CH |
221 | #ifdef _WIN32 |
222 | int is_windows_drive(const char *filename); | |
223 | #endif | |
224 | ||
428c149b | 225 | typedef struct BlockConf { |
f8b6cc00 | 226 | BlockDriverState *bs; |
428c149b | 227 | uint16_t physical_block_size; |
8cfacf07 | 228 | uint16_t logical_block_size; |
428c149b CH |
229 | uint16_t min_io_size; |
230 | uint32_t opt_io_size; | |
1ca4d09a | 231 | int32_t bootindex; |
bb8bf76f | 232 | uint32_t discard_granularity; |
428c149b CH |
233 | } BlockConf; |
234 | ||
235 | static inline unsigned int get_physical_block_exp(BlockConf *conf) | |
236 | { | |
237 | unsigned int exp = 0, size; | |
238 | ||
1e297c32 CH |
239 | for (size = conf->physical_block_size; |
240 | size > conf->logical_block_size; | |
241 | size >>= 1) { | |
428c149b CH |
242 | exp++; |
243 | } | |
244 | ||
245 | return exp; | |
246 | } | |
247 | ||
248 | #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ | |
f8b6cc00 | 249 | DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \ |
8cfacf07 CH |
250 | DEFINE_PROP_UINT16("logical_block_size", _state, \ |
251 | _conf.logical_block_size, 512), \ | |
428c149b CH |
252 | DEFINE_PROP_UINT16("physical_block_size", _state, \ |
253 | _conf.physical_block_size, 512), \ | |
55459498 | 254 | DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \ |
1ca4d09a | 255 | DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ |
bb8bf76f CH |
256 | DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1), \ |
257 | DEFINE_PROP_UINT32("discard_granularity", _state, \ | |
258 | _conf.discard_granularity, 0) | |
428c149b | 259 | |
ea2384d3 | 260 | #endif /* BLOCK_INT_H */ |