root / block.h @ 3329f07b
History | View | Annotate | Download (10.7 kB)
1 |
#ifndef BLOCK_H
|
---|---|
2 |
#define BLOCK_H
|
3 |
|
4 |
#include "qemu-aio.h" |
5 |
#include "qemu-common.h" |
6 |
#include "qemu-option.h" |
7 |
#include "qobject.h" |
8 |
|
9 |
/* block.c */
|
10 |
typedef struct BlockDriver BlockDriver; |
11 |
|
12 |
typedef struct BlockDriverInfo { |
13 |
/* in bytes, 0 if irrelevant */
|
14 |
int cluster_size;
|
15 |
/* offset at which the VM state can be saved (0 if not possible) */
|
16 |
int64_t vm_state_offset; |
17 |
} BlockDriverInfo; |
18 |
|
19 |
typedef struct QEMUSnapshotInfo { |
20 |
char id_str[128]; /* unique snapshot id */ |
21 |
/* the following fields are informative. They are not needed for
|
22 |
the consistency of the snapshot */
|
23 |
char name[256]; /* user choosen name */ |
24 |
uint32_t vm_state_size; /* VM state info size */
|
25 |
uint32_t date_sec; /* UTC date of the snapshot */
|
26 |
uint32_t date_nsec; |
27 |
uint64_t vm_clock_nsec; /* VM clock relative to boot */
|
28 |
} QEMUSnapshotInfo; |
29 |
|
30 |
#define BDRV_O_RDWR 0x0002 |
31 |
#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
32 |
#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ |
33 |
#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ |
34 |
#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ |
35 |
#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ |
36 |
#define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ |
37 |
|
38 |
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB)
|
39 |
|
40 |
#define BDRV_SECTOR_BITS 9 |
41 |
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) |
42 |
#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) |
43 |
|
44 |
typedef enum { |
45 |
BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC, |
46 |
BLOCK_ERR_STOP_ANY |
47 |
} BlockErrorAction; |
48 |
|
49 |
typedef enum { |
50 |
BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP |
51 |
} BlockMonEventAction; |
52 |
|
53 |
void bdrv_mon_event(const BlockDriverState *bdrv, |
54 |
BlockMonEventAction action, int is_read);
|
55 |
void bdrv_info_print(Monitor *mon, const QObject *data); |
56 |
void bdrv_info(Monitor *mon, QObject **ret_data);
|
57 |
void bdrv_stats_print(Monitor *mon, const QObject *data); |
58 |
void bdrv_info_stats(Monitor *mon, QObject **ret_data);
|
59 |
|
60 |
void bdrv_init(void); |
61 |
void bdrv_init_with_whitelist(void); |
62 |
BlockDriver *bdrv_find_protocol(const char *filename); |
63 |
BlockDriver *bdrv_find_format(const char *format_name); |
64 |
BlockDriver *bdrv_find_whitelisted_format(const char *format_name); |
65 |
int bdrv_create(BlockDriver *drv, const char* filename, |
66 |
QEMUOptionParameter *options); |
67 |
int bdrv_create_file(const char* filename, QEMUOptionParameter *options); |
68 |
BlockDriverState *bdrv_new(const char *device_name); |
69 |
void bdrv_delete(BlockDriverState *bs);
|
70 |
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); |
71 |
int bdrv_open(BlockDriverState *bs, const char *filename, int flags, |
72 |
BlockDriver *drv); |
73 |
void bdrv_close(BlockDriverState *bs);
|
74 |
int bdrv_attach(BlockDriverState *bs, DeviceState *qdev);
|
75 |
void bdrv_detach(BlockDriverState *bs, DeviceState *qdev);
|
76 |
DeviceState *bdrv_get_attached(BlockDriverState *bs); |
77 |
int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
78 |
uint8_t *buf, int nb_sectors);
|
79 |
int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
80 |
const uint8_t *buf, int nb_sectors); |
81 |
int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
82 |
void *buf, int count); |
83 |
int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
84 |
const void *buf, int count); |
85 |
int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
|
86 |
const void *buf, int count); |
87 |
int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num,
|
88 |
const uint8_t *buf, int nb_sectors); |
89 |
int bdrv_truncate(BlockDriverState *bs, int64_t offset);
|
90 |
int64_t bdrv_getlength(BlockDriverState *bs); |
91 |
void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
|
92 |
void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); |
93 |
int bdrv_commit(BlockDriverState *bs);
|
94 |
void bdrv_commit_all(void); |
95 |
int bdrv_change_backing_file(BlockDriverState *bs,
|
96 |
const char *backing_file, const char *backing_fmt); |
97 |
void bdrv_register(BlockDriver *bdrv);
|
98 |
|
99 |
|
100 |
typedef struct BdrvCheckResult { |
101 |
int corruptions;
|
102 |
int leaks;
|
103 |
int check_errors;
|
104 |
} BdrvCheckResult; |
105 |
|
106 |
int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res);
|
107 |
|
108 |
/* async block I/O */
|
109 |
typedef struct BlockDriverAIOCB BlockDriverAIOCB; |
110 |
typedef void BlockDriverCompletionFunc(void *opaque, int ret); |
111 |
typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, |
112 |
int sector_num);
|
113 |
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
114 |
QEMUIOVector *iov, int nb_sectors,
|
115 |
BlockDriverCompletionFunc *cb, void *opaque);
|
116 |
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
117 |
QEMUIOVector *iov, int nb_sectors,
|
118 |
BlockDriverCompletionFunc *cb, void *opaque);
|
119 |
BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
120 |
BlockDriverCompletionFunc *cb, void *opaque);
|
121 |
void bdrv_aio_cancel(BlockDriverAIOCB *acb);
|
122 |
|
123 |
typedef struct BlockRequest { |
124 |
/* Fields to be filled by multiwrite caller */
|
125 |
int64_t sector; |
126 |
int nb_sectors;
|
127 |
QEMUIOVector *qiov; |
128 |
BlockDriverCompletionFunc *cb; |
129 |
void *opaque;
|
130 |
|
131 |
/* Filled by multiwrite implementation */
|
132 |
int error;
|
133 |
} BlockRequest; |
134 |
|
135 |
int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
|
136 |
int num_reqs);
|
137 |
|
138 |
/* sg packet commands */
|
139 |
int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); |
140 |
BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
141 |
unsigned long int req, void *buf, |
142 |
BlockDriverCompletionFunc *cb, void *opaque);
|
143 |
|
144 |
/* Ensure contents are flushed to disk. */
|
145 |
void bdrv_flush(BlockDriverState *bs);
|
146 |
void bdrv_flush_all(void); |
147 |
void bdrv_close_all(void); |
148 |
|
149 |
int bdrv_has_zero_init(BlockDriverState *bs);
|
150 |
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
151 |
int *pnum);
|
152 |
|
153 |
#define BDRV_TYPE_HD 0 |
154 |
#define BDRV_TYPE_CDROM 1 |
155 |
#define BDRV_TYPE_FLOPPY 2 |
156 |
#define BIOS_ATA_TRANSLATION_AUTO 0 |
157 |
#define BIOS_ATA_TRANSLATION_NONE 1 |
158 |
#define BIOS_ATA_TRANSLATION_LBA 2 |
159 |
#define BIOS_ATA_TRANSLATION_LARGE 3 |
160 |
#define BIOS_ATA_TRANSLATION_RECHS 4 |
161 |
|
162 |
void bdrv_set_geometry_hint(BlockDriverState *bs,
|
163 |
int cyls, int heads, int secs); |
164 |
void bdrv_set_type_hint(BlockDriverState *bs, int type); |
165 |
void bdrv_set_translation_hint(BlockDriverState *bs, int translation); |
166 |
void bdrv_get_geometry_hint(BlockDriverState *bs,
|
167 |
int *pcyls, int *pheads, int *psecs); |
168 |
int bdrv_get_type_hint(BlockDriverState *bs);
|
169 |
int bdrv_get_translation_hint(BlockDriverState *bs);
|
170 |
void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
|
171 |
BlockErrorAction on_write_error); |
172 |
BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
|
173 |
void bdrv_set_removable(BlockDriverState *bs, int removable); |
174 |
int bdrv_is_removable(BlockDriverState *bs);
|
175 |
int bdrv_is_read_only(BlockDriverState *bs);
|
176 |
int bdrv_is_sg(BlockDriverState *bs);
|
177 |
int bdrv_enable_write_cache(BlockDriverState *bs);
|
178 |
int bdrv_is_inserted(BlockDriverState *bs);
|
179 |
int bdrv_media_changed(BlockDriverState *bs);
|
180 |
int bdrv_is_locked(BlockDriverState *bs);
|
181 |
void bdrv_set_locked(BlockDriverState *bs, int locked); |
182 |
int bdrv_eject(BlockDriverState *bs, int eject_flag); |
183 |
void bdrv_set_change_cb(BlockDriverState *bs,
|
184 |
void (*change_cb)(void *opaque), void *opaque); |
185 |
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); |
186 |
BlockDriverState *bdrv_find(const char *name); |
187 |
BlockDriverState *bdrv_next(BlockDriverState *bs); |
188 |
void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), |
189 |
void *opaque);
|
190 |
int bdrv_is_encrypted(BlockDriverState *bs);
|
191 |
int bdrv_key_required(BlockDriverState *bs);
|
192 |
int bdrv_set_key(BlockDriverState *bs, const char *key); |
193 |
int bdrv_query_missing_keys(void); |
194 |
void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
195 |
void *opaque);
|
196 |
const char *bdrv_get_device_name(BlockDriverState *bs); |
197 |
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
198 |
const uint8_t *buf, int nb_sectors); |
199 |
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
|
200 |
|
201 |
const char *bdrv_get_encrypted_filename(BlockDriverState *bs); |
202 |
void bdrv_get_backing_filename(BlockDriverState *bs,
|
203 |
char *filename, int filename_size); |
204 |
int bdrv_can_snapshot(BlockDriverState *bs);
|
205 |
int bdrv_is_snapshot(BlockDriverState *bs);
|
206 |
BlockDriverState *bdrv_snapshots(void);
|
207 |
int bdrv_snapshot_create(BlockDriverState *bs,
|
208 |
QEMUSnapshotInfo *sn_info); |
209 |
int bdrv_snapshot_goto(BlockDriverState *bs,
|
210 |
const char *snapshot_id); |
211 |
int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); |
212 |
int bdrv_snapshot_list(BlockDriverState *bs,
|
213 |
QEMUSnapshotInfo **psn_info); |
214 |
char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); |
215 |
|
216 |
char *get_human_readable_size(char *buf, int buf_size, int64_t size); |
217 |
int path_is_absolute(const char *path); |
218 |
void path_combine(char *dest, int dest_size, |
219 |
const char *base_path, |
220 |
const char *filename); |
221 |
|
222 |
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
223 |
int64_t pos, int size);
|
224 |
|
225 |
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
226 |
int64_t pos, int size);
|
227 |
|
228 |
#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 |
229 |
|
230 |
void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); |
231 |
int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
|
232 |
void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
|
233 |
int nr_sectors);
|
234 |
int64_t bdrv_get_dirty_count(BlockDriverState *bs); |
235 |
|
236 |
|
237 |
typedef enum { |
238 |
BLKDBG_L1_UPDATE, |
239 |
|
240 |
BLKDBG_L1_GROW_ALLOC_TABLE, |
241 |
BLKDBG_L1_GROW_WRITE_TABLE, |
242 |
BLKDBG_L1_GROW_ACTIVATE_TABLE, |
243 |
|
244 |
BLKDBG_L2_LOAD, |
245 |
BLKDBG_L2_UPDATE, |
246 |
BLKDBG_L2_UPDATE_COMPRESSED, |
247 |
BLKDBG_L2_ALLOC_COW_READ, |
248 |
BLKDBG_L2_ALLOC_WRITE, |
249 |
|
250 |
BLKDBG_READ, |
251 |
BLKDBG_READ_AIO, |
252 |
BLKDBG_READ_BACKING, |
253 |
BLKDBG_READ_BACKING_AIO, |
254 |
BLKDBG_READ_COMPRESSED, |
255 |
|
256 |
BLKDBG_WRITE_AIO, |
257 |
BLKDBG_WRITE_COMPRESSED, |
258 |
|
259 |
BLKDBG_VMSTATE_LOAD, |
260 |
BLKDBG_VMSTATE_SAVE, |
261 |
|
262 |
BLKDBG_COW_READ, |
263 |
BLKDBG_COW_WRITE, |
264 |
|
265 |
BLKDBG_REFTABLE_LOAD, |
266 |
BLKDBG_REFTABLE_GROW, |
267 |
|
268 |
BLKDBG_REFBLOCK_LOAD, |
269 |
BLKDBG_REFBLOCK_UPDATE, |
270 |
BLKDBG_REFBLOCK_UPDATE_PART, |
271 |
BLKDBG_REFBLOCK_ALLOC, |
272 |
BLKDBG_REFBLOCK_ALLOC_HOOKUP, |
273 |
BLKDBG_REFBLOCK_ALLOC_WRITE, |
274 |
BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, |
275 |
BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, |
276 |
BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, |
277 |
|
278 |
BLKDBG_CLUSTER_ALLOC, |
279 |
BLKDBG_CLUSTER_ALLOC_BYTES, |
280 |
BLKDBG_CLUSTER_FREE, |
281 |
|
282 |
BLKDBG_EVENT_MAX, |
283 |
} BlkDebugEvent; |
284 |
|
285 |
#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
|
286 |
void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
|
287 |
|
288 |
#endif
|