5 #include "qemu-common.h"
6 #include "qemu-option.h"
10 typedef struct BlockDriver BlockDriver
;
12 typedef struct BlockDriverInfo
{
13 /* in bytes, 0 if irrelevant */
15 /* offset at which the VM state can be saved (0 if not possible) */
16 int64_t vm_state_offset
;
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 */
27 uint64_t vm_clock_nsec
; /* VM clock relative to boot */
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 */
38 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
40 #define BDRV_SECTOR_BITS 9
41 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
42 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
45 BLOCK_ERR_REPORT
, BLOCK_ERR_IGNORE
, BLOCK_ERR_STOP_ENOSPC
,
50 BDRV_ACTION_REPORT
, BDRV_ACTION_IGNORE
, BDRV_ACTION_STOP
51 } BlockMonEventAction
;
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
);
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
,
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
);
100 typedef struct BdrvCheckResult
{
106 int bdrv_check(BlockDriverState
*bs
, BdrvCheckResult
*res
);
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
,
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
);
123 typedef struct BlockRequest
{
124 /* Fields to be filled by multiwrite caller */
128 BlockDriverCompletionFunc
*cb
;
131 /* Filled by multiwrite implementation */
135 int bdrv_aio_multiwrite(BlockDriverState
*bs
, BlockRequest
*reqs
,
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
);
144 /* Ensure contents are flushed to disk. */
145 int bdrv_flush(BlockDriverState
*bs
);
146 void bdrv_flush_all(void);
147 void bdrv_close_all(void);
149 int bdrv_has_zero_init(BlockDriverState
*bs
);
150 int bdrv_is_allocated(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
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
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
),
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
),
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
);
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 int bdrv_snapshot_load_tmp(BlockDriverState
*bs
,
215 const char *snapshot_name
);
216 char *bdrv_snapshot_dump(char *buf
, int buf_size
, QEMUSnapshotInfo
*sn
);
218 char *get_human_readable_size(char *buf
, int buf_size
, int64_t size
);
219 int path_is_absolute(const char *path
);
220 void path_combine(char *dest
, int dest_size
,
221 const char *base_path
,
222 const char *filename
);
224 int bdrv_save_vmstate(BlockDriverState
*bs
, const uint8_t *buf
,
225 int64_t pos
, int size
);
227 int bdrv_load_vmstate(BlockDriverState
*bs
, uint8_t *buf
,
228 int64_t pos
, int size
);
230 #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
232 void bdrv_set_dirty_tracking(BlockDriverState
*bs
, int enable
);
233 int bdrv_get_dirty(BlockDriverState
*bs
, int64_t sector
);
234 void bdrv_reset_dirty(BlockDriverState
*bs
, int64_t cur_sector
,
236 int64_t bdrv_get_dirty_count(BlockDriverState
*bs
);
242 BLKDBG_L1_GROW_ALLOC_TABLE
,
243 BLKDBG_L1_GROW_WRITE_TABLE
,
244 BLKDBG_L1_GROW_ACTIVATE_TABLE
,
248 BLKDBG_L2_UPDATE_COMPRESSED
,
249 BLKDBG_L2_ALLOC_COW_READ
,
250 BLKDBG_L2_ALLOC_WRITE
,
255 BLKDBG_READ_BACKING_AIO
,
256 BLKDBG_READ_COMPRESSED
,
259 BLKDBG_WRITE_COMPRESSED
,
267 BLKDBG_REFTABLE_LOAD
,
268 BLKDBG_REFTABLE_GROW
,
270 BLKDBG_REFBLOCK_LOAD
,
271 BLKDBG_REFBLOCK_UPDATE
,
272 BLKDBG_REFBLOCK_UPDATE_PART
,
273 BLKDBG_REFBLOCK_ALLOC
,
274 BLKDBG_REFBLOCK_ALLOC_HOOKUP
,
275 BLKDBG_REFBLOCK_ALLOC_WRITE
,
276 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS
,
277 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE
,
278 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE
,
280 BLKDBG_CLUSTER_ALLOC
,
281 BLKDBG_CLUSTER_ALLOC_BYTES
,
287 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
288 void bdrv_debug_event(BlockDriverState
*bs
, BlkDebugEvent event
);