5 #include "qemu-common.h"
6 #include "qemu/option.h"
7 #include "block/coroutine.h"
8 #include "qapi/qmp/qobject.h"
9 #include "qapi-types.h"
12 typedef struct BlockDriver BlockDriver
;
13 typedef struct BlockJob BlockJob
;
15 typedef struct BlockDriverInfo
{
16 /* in bytes, 0 if irrelevant */
18 /* offset at which the VM state can be saved (0 if not possible) */
19 int64_t vm_state_offset
;
22 * True if unallocated blocks read back as zeroes. This is equivalent
23 * to the the LBPRZ flag in the SCSI logical block provisioning page.
25 bool unallocated_blocks_are_zero
;
27 * True if the driver can optimize writing zeroes by unmapping
28 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
29 * with the difference that in qemu a discard is allowed to silently
30 * fail. Therefore we have to use bdrv_write_zeroes with the
31 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
32 * After this call the driver has to guarantee that the contents read
33 * back as zero. It is additionally required that the block device is
34 * opened with BDRV_O_UNMAP flag for this to work.
36 bool can_write_zeroes_with_unmap
;
39 typedef struct BlockFragInfo
{
40 uint64_t allocated_clusters
;
41 uint64_t total_clusters
;
42 uint64_t fragmented_clusters
;
43 uint64_t compressed_clusters
;
46 /* Callbacks for block device models */
47 typedef struct BlockDevOps
{
49 * Runs when virtual media changed (monitor commands eject, change)
50 * Argument load is true on load and false on eject.
51 * Beware: doesn't run when a host device's physical media
52 * changes. Sure would be useful if it did.
53 * Device models with removable media must implement this callback.
55 void (*change_media_cb
)(void *opaque
, bool load
);
57 * Runs when an eject request is issued from the monitor, the tray
58 * is closed, and the medium is locked.
59 * Device models that do not implement is_medium_locked will not need
60 * this callback. Device models that can lock the medium or tray might
61 * want to implement the callback and unlock the tray when "force" is
62 * true, even if they do not support eject requests.
64 void (*eject_request_cb
)(void *opaque
, bool force
);
66 * Is the virtual tray open?
67 * Device models implement this only when the device has a tray.
69 bool (*is_tray_open
)(void *opaque
);
71 * Is the virtual medium locked into the device?
72 * Device models implement this only when device has such a lock.
74 bool (*is_medium_locked
)(void *opaque
);
76 * Runs when the size changed (e.g. monitor command block_resize)
78 void (*resize_cb
)(void *opaque
);
82 BDRV_REQ_COPY_ON_READ
= 0x1,
83 BDRV_REQ_ZERO_WRITE
= 0x2,
84 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver
85 * is allowed to optimize a write zeroes request by unmapping (discarding)
86 * blocks if it is guaranteed that the result will read back as
87 * zeroes. The flag is only passed to the driver if the block device is
88 * opened with BDRV_O_UNMAP.
90 BDRV_REQ_MAY_UNMAP
= 0x4,
93 #define BDRV_O_RDWR 0x0002
94 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
95 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
96 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
97 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
98 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
99 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
100 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
101 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */
102 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
103 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
104 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */
106 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
108 #define BDRV_SECTOR_BITS 9
109 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
110 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
112 /* BDRV_BLOCK_DATA: data is read from bs->file or another file
113 * BDRV_BLOCK_ZERO: sectors read as zero
114 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
115 * BDRV_BLOCK_RAW: used internally to indicate that the request
116 * was answered by the raw driver and that one
117 * should look in bs->file directly.
119 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
120 * bs->file where sector data can be read from as raw data.
122 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
124 * DATA ZERO OFFSET_VALID
125 * t t t sectors read as zero, bs->file is zero at offset
126 * t f t sectors read as valid from bs->file at offset
127 * f t t sectors preallocated, read as zero, bs->file not
128 * necessarily zero at offset
129 * f f t sectors preallocated but read from backing_hd,
130 * bs->file contains garbage at offset
131 * t t f sectors preallocated, read as zero, unknown offset
132 * t f f sectors read from unknown file or offset
133 * f t f not allocated or unknown offset, read as zero
134 * f f f not allocated or unknown offset, read from backing_hd
136 #define BDRV_BLOCK_DATA 1
137 #define BDRV_BLOCK_ZERO 2
138 #define BDRV_BLOCK_OFFSET_VALID 4
139 #define BDRV_BLOCK_RAW 8
140 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
143 BDRV_ACTION_REPORT
, BDRV_ACTION_IGNORE
, BDRV_ACTION_STOP
146 typedef QSIMPLEQ_HEAD(BlockReopenQueue
, BlockReopenQueueEntry
) BlockReopenQueue
;
148 typedef struct BDRVReopenState
{
149 BlockDriverState
*bs
;
155 void bdrv_iostatus_enable(BlockDriverState
*bs
);
156 void bdrv_iostatus_reset(BlockDriverState
*bs
);
157 void bdrv_iostatus_disable(BlockDriverState
*bs
);
158 bool bdrv_iostatus_is_enabled(const BlockDriverState
*bs
);
159 void bdrv_iostatus_set_err(BlockDriverState
*bs
, int error
);
160 void bdrv_info_print(Monitor
*mon
, const QObject
*data
);
161 void bdrv_info(Monitor
*mon
, QObject
**ret_data
);
162 void bdrv_stats_print(Monitor
*mon
, const QObject
*data
);
163 void bdrv_info_stats(Monitor
*mon
, QObject
**ret_data
);
165 /* disk I/O throttling */
166 void bdrv_io_limits_enable(BlockDriverState
*bs
);
167 void bdrv_io_limits_disable(BlockDriverState
*bs
);
169 void bdrv_init(void);
170 void bdrv_init_with_whitelist(void);
171 BlockDriver
*bdrv_find_protocol(const char *filename
,
172 bool allow_protocol_prefix
);
173 BlockDriver
*bdrv_find_format(const char *format_name
);
174 BlockDriver
*bdrv_find_whitelisted_format(const char *format_name
,
176 int bdrv_create(BlockDriver
*drv
, const char* filename
,
177 QEMUOptionParameter
*options
, Error
**errp
);
178 int bdrv_create_file(const char* filename
, QEMUOptionParameter
*options
,
180 BlockDriverState
*bdrv_new(const char *device_name
);
181 void bdrv_make_anon(BlockDriverState
*bs
);
182 void bdrv_swap(BlockDriverState
*bs_new
, BlockDriverState
*bs_old
);
183 void bdrv_append(BlockDriverState
*bs_new
, BlockDriverState
*bs_top
);
184 int bdrv_parse_cache_flags(const char *mode
, int *flags
);
185 int bdrv_parse_discard_flags(const char *mode
, int *flags
);
186 int bdrv_file_open(BlockDriverState
**pbs
, const char *filename
,
187 QDict
*options
, int flags
, Error
**errp
);
188 int bdrv_open_backing_file(BlockDriverState
*bs
, QDict
*options
, Error
**errp
);
189 int bdrv_open(BlockDriverState
*bs
, const char *filename
, QDict
*options
,
190 int flags
, BlockDriver
*drv
, Error
**errp
);
191 BlockReopenQueue
*bdrv_reopen_queue(BlockReopenQueue
*bs_queue
,
192 BlockDriverState
*bs
, int flags
);
193 int bdrv_reopen_multiple(BlockReopenQueue
*bs_queue
, Error
**errp
);
194 int bdrv_reopen(BlockDriverState
*bs
, int bdrv_flags
, Error
**errp
);
195 int bdrv_reopen_prepare(BDRVReopenState
*reopen_state
,
196 BlockReopenQueue
*queue
, Error
**errp
);
197 void bdrv_reopen_commit(BDRVReopenState
*reopen_state
);
198 void bdrv_reopen_abort(BDRVReopenState
*reopen_state
);
199 void bdrv_close(BlockDriverState
*bs
);
200 void bdrv_add_close_notifier(BlockDriverState
*bs
, Notifier
*notify
);
201 int bdrv_attach_dev(BlockDriverState
*bs
, void *dev
);
202 void bdrv_attach_dev_nofail(BlockDriverState
*bs
, void *dev
);
203 void bdrv_detach_dev(BlockDriverState
*bs
, void *dev
);
204 void *bdrv_get_attached_dev(BlockDriverState
*bs
);
205 void bdrv_set_dev_ops(BlockDriverState
*bs
, const BlockDevOps
*ops
,
207 void bdrv_dev_eject_request(BlockDriverState
*bs
, bool force
);
208 bool bdrv_dev_has_removable_media(BlockDriverState
*bs
);
209 bool bdrv_dev_is_tray_open(BlockDriverState
*bs
);
210 bool bdrv_dev_is_medium_locked(BlockDriverState
*bs
);
211 int bdrv_read(BlockDriverState
*bs
, int64_t sector_num
,
212 uint8_t *buf
, int nb_sectors
);
213 int bdrv_read_unthrottled(BlockDriverState
*bs
, int64_t sector_num
,
214 uint8_t *buf
, int nb_sectors
);
215 int bdrv_write(BlockDriverState
*bs
, int64_t sector_num
,
216 const uint8_t *buf
, int nb_sectors
);
217 int bdrv_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
218 int nb_sectors
, BdrvRequestFlags flags
);
219 int bdrv_writev(BlockDriverState
*bs
, int64_t sector_num
, QEMUIOVector
*qiov
);
220 int bdrv_pread(BlockDriverState
*bs
, int64_t offset
,
221 void *buf
, int count
);
222 int bdrv_pwrite(BlockDriverState
*bs
, int64_t offset
,
223 const void *buf
, int count
);
224 int bdrv_pwritev(BlockDriverState
*bs
, int64_t offset
, QEMUIOVector
*qiov
);
225 int bdrv_pwrite_sync(BlockDriverState
*bs
, int64_t offset
,
226 const void *buf
, int count
);
227 int coroutine_fn
bdrv_co_readv(BlockDriverState
*bs
, int64_t sector_num
,
228 int nb_sectors
, QEMUIOVector
*qiov
);
229 int coroutine_fn
bdrv_co_copy_on_readv(BlockDriverState
*bs
,
230 int64_t sector_num
, int nb_sectors
, QEMUIOVector
*qiov
);
231 int coroutine_fn
bdrv_co_writev(BlockDriverState
*bs
, int64_t sector_num
,
232 int nb_sectors
, QEMUIOVector
*qiov
);
234 * Efficiently zero a region of the disk image. Note that this is a regular
235 * I/O request like read or write and should have a reasonable size. This
236 * function is not suitable for zeroing the entire image in a single request
237 * because it may allocate memory for the entire region.
239 int coroutine_fn
bdrv_co_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
240 int nb_sectors
, BdrvRequestFlags flags
);
241 BlockDriverState
*bdrv_find_backing_image(BlockDriverState
*bs
,
242 const char *backing_file
);
243 int bdrv_get_backing_file_depth(BlockDriverState
*bs
);
244 int bdrv_truncate(BlockDriverState
*bs
, int64_t offset
);
245 int64_t bdrv_getlength(BlockDriverState
*bs
);
246 int64_t bdrv_get_allocated_file_size(BlockDriverState
*bs
);
247 void bdrv_get_geometry(BlockDriverState
*bs
, uint64_t *nb_sectors_ptr
);
248 int bdrv_commit(BlockDriverState
*bs
);
249 int bdrv_commit_all(void);
250 int bdrv_change_backing_file(BlockDriverState
*bs
,
251 const char *backing_file
, const char *backing_fmt
);
252 void bdrv_register(BlockDriver
*bdrv
);
253 int bdrv_drop_intermediate(BlockDriverState
*active
, BlockDriverState
*top
,
254 BlockDriverState
*base
);
255 BlockDriverState
*bdrv_find_overlay(BlockDriverState
*active
,
256 BlockDriverState
*bs
);
257 BlockDriverState
*bdrv_find_base(BlockDriverState
*bs
);
260 typedef struct BdrvCheckResult
{
264 int corruptions_fixed
;
266 int64_t image_end_offset
;
275 int bdrv_check(BlockDriverState
*bs
, BdrvCheckResult
*res
, BdrvCheckMode fix
);
277 int bdrv_amend_options(BlockDriverState
*bs_new
, QEMUOptionParameter
*options
);
279 /* external snapshots */
282 EXT_SNAPSHOT_ALLOWED
,
283 EXT_SNAPSHOT_FORBIDDEN
,
286 /* return EXT_SNAPSHOT_ALLOWED if external snapshot is allowed
287 * return EXT_SNAPSHOT_FORBIDDEN if external snapshot is forbidden
289 ExtSnapshotPerm
bdrv_check_ext_snapshot(BlockDriverState
*bs
);
290 /* helper used to forbid external snapshots like in blkverify */
291 ExtSnapshotPerm
bdrv_check_ext_snapshot_forbidden(BlockDriverState
*bs
);
293 /* async block I/O */
294 typedef void BlockDriverDirtyHandler(BlockDriverState
*bs
, int64_t sector
,
296 BlockDriverAIOCB
*bdrv_aio_readv(BlockDriverState
*bs
, int64_t sector_num
,
297 QEMUIOVector
*iov
, int nb_sectors
,
298 BlockDriverCompletionFunc
*cb
, void *opaque
);
299 BlockDriverAIOCB
*bdrv_aio_writev(BlockDriverState
*bs
, int64_t sector_num
,
300 QEMUIOVector
*iov
, int nb_sectors
,
301 BlockDriverCompletionFunc
*cb
, void *opaque
);
302 BlockDriverAIOCB
*bdrv_aio_flush(BlockDriverState
*bs
,
303 BlockDriverCompletionFunc
*cb
, void *opaque
);
304 BlockDriverAIOCB
*bdrv_aio_discard(BlockDriverState
*bs
,
305 int64_t sector_num
, int nb_sectors
,
306 BlockDriverCompletionFunc
*cb
, void *opaque
);
307 void bdrv_aio_cancel(BlockDriverAIOCB
*acb
);
309 typedef struct BlockRequest
{
310 /* Fields to be filled by multiwrite caller */
314 BlockDriverCompletionFunc
*cb
;
317 /* Filled by multiwrite implementation */
321 int bdrv_aio_multiwrite(BlockDriverState
*bs
, BlockRequest
*reqs
,
324 /* sg packet commands */
325 int bdrv_ioctl(BlockDriverState
*bs
, unsigned long int req
, void *buf
);
326 BlockDriverAIOCB
*bdrv_aio_ioctl(BlockDriverState
*bs
,
327 unsigned long int req
, void *buf
,
328 BlockDriverCompletionFunc
*cb
, void *opaque
);
330 /* Invalidate any cached metadata used by image formats */
331 void bdrv_invalidate_cache(BlockDriverState
*bs
);
332 void bdrv_invalidate_cache_all(void);
334 void bdrv_clear_incoming_migration_all(void);
336 /* Ensure contents are flushed to disk. */
337 int bdrv_flush(BlockDriverState
*bs
);
338 int coroutine_fn
bdrv_co_flush(BlockDriverState
*bs
);
339 int bdrv_flush_all(void);
340 void bdrv_close_all(void);
341 void bdrv_drain_all(void);
343 int bdrv_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
344 int bdrv_co_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
345 int bdrv_has_zero_init_1(BlockDriverState
*bs
);
346 int bdrv_has_zero_init(BlockDriverState
*bs
);
347 bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs
);
348 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState
*bs
);
349 int64_t bdrv_get_block_status(BlockDriverState
*bs
, int64_t sector_num
,
350 int nb_sectors
, int *pnum
);
351 int bdrv_is_allocated(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
353 int bdrv_is_allocated_above(BlockDriverState
*top
, BlockDriverState
*base
,
354 int64_t sector_num
, int nb_sectors
, int *pnum
);
356 void bdrv_set_on_error(BlockDriverState
*bs
, BlockdevOnError on_read_error
,
357 BlockdevOnError on_write_error
);
358 BlockdevOnError
bdrv_get_on_error(BlockDriverState
*bs
, bool is_read
);
359 BlockErrorAction
bdrv_get_error_action(BlockDriverState
*bs
, bool is_read
, int error
);
360 void bdrv_error_action(BlockDriverState
*bs
, BlockErrorAction action
,
361 bool is_read
, int error
);
362 int bdrv_is_read_only(BlockDriverState
*bs
);
363 int bdrv_is_sg(BlockDriverState
*bs
);
364 int bdrv_enable_write_cache(BlockDriverState
*bs
);
365 void bdrv_set_enable_write_cache(BlockDriverState
*bs
, bool wce
);
366 int bdrv_is_inserted(BlockDriverState
*bs
);
367 int bdrv_media_changed(BlockDriverState
*bs
);
368 void bdrv_lock_medium(BlockDriverState
*bs
, bool locked
);
369 void bdrv_eject(BlockDriverState
*bs
, bool eject_flag
);
370 const char *bdrv_get_format_name(BlockDriverState
*bs
);
371 BlockDriverState
*bdrv_find(const char *name
);
372 BlockDriverState
*bdrv_next(BlockDriverState
*bs
);
373 void bdrv_iterate(void (*it
)(void *opaque
, BlockDriverState
*bs
),
375 int bdrv_is_encrypted(BlockDriverState
*bs
);
376 int bdrv_key_required(BlockDriverState
*bs
);
377 int bdrv_set_key(BlockDriverState
*bs
, const char *key
);
378 int bdrv_query_missing_keys(void);
379 void bdrv_iterate_format(void (*it
)(void *opaque
, const char *name
),
381 const char *bdrv_get_device_name(BlockDriverState
*bs
);
382 int bdrv_get_flags(BlockDriverState
*bs
);
383 int bdrv_write_compressed(BlockDriverState
*bs
, int64_t sector_num
,
384 const uint8_t *buf
, int nb_sectors
);
385 int bdrv_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
);
386 ImageInfoSpecific
*bdrv_get_specific_info(BlockDriverState
*bs
);
387 void bdrv_round_to_clusters(BlockDriverState
*bs
,
388 int64_t sector_num
, int nb_sectors
,
389 int64_t *cluster_sector_num
,
390 int *cluster_nb_sectors
);
392 const char *bdrv_get_encrypted_filename(BlockDriverState
*bs
);
393 void bdrv_get_backing_filename(BlockDriverState
*bs
,
394 char *filename
, int filename_size
);
395 void bdrv_get_full_backing_filename(BlockDriverState
*bs
,
396 char *dest
, size_t sz
);
397 int bdrv_is_snapshot(BlockDriverState
*bs
);
399 int path_is_absolute(const char *path
);
400 void path_combine(char *dest
, int dest_size
,
401 const char *base_path
,
402 const char *filename
);
404 int bdrv_writev_vmstate(BlockDriverState
*bs
, QEMUIOVector
*qiov
, int64_t pos
);
405 int bdrv_save_vmstate(BlockDriverState
*bs
, const uint8_t *buf
,
406 int64_t pos
, int size
);
408 int bdrv_load_vmstate(BlockDriverState
*bs
, uint8_t *buf
,
409 int64_t pos
, int size
);
411 void bdrv_img_create(const char *filename
, const char *fmt
,
412 const char *base_filename
, const char *base_fmt
,
413 char *options
, uint64_t img_size
, int flags
,
414 Error
**errp
, bool quiet
);
416 void bdrv_set_buffer_alignment(BlockDriverState
*bs
, int align
);
417 void *qemu_blockalign(BlockDriverState
*bs
, size_t size
);
418 bool bdrv_qiov_is_aligned(BlockDriverState
*bs
, QEMUIOVector
*qiov
);
421 void bdrv_set_dirty_tracking(BlockDriverState
*bs
, int granularity
);
422 int bdrv_get_dirty(BlockDriverState
*bs
, int64_t sector
);
423 void bdrv_set_dirty(BlockDriverState
*bs
, int64_t cur_sector
, int nr_sectors
);
424 void bdrv_reset_dirty(BlockDriverState
*bs
, int64_t cur_sector
, int nr_sectors
);
425 void bdrv_dirty_iter_init(BlockDriverState
*bs
, struct HBitmapIter
*hbi
);
426 int64_t bdrv_get_dirty_count(BlockDriverState
*bs
);
428 void bdrv_enable_copy_on_read(BlockDriverState
*bs
);
429 void bdrv_disable_copy_on_read(BlockDriverState
*bs
);
431 void bdrv_ref(BlockDriverState
*bs
);
432 void bdrv_unref(BlockDriverState
*bs
);
433 void bdrv_set_in_use(BlockDriverState
*bs
, int in_use
);
434 int bdrv_in_use(BlockDriverState
*bs
);
436 #ifdef CONFIG_LINUX_AIO
437 int raw_get_aio_fd(BlockDriverState
*bs
);
439 static inline int raw_get_aio_fd(BlockDriverState
*bs
)
452 typedef struct BlockAcctCookie
{
454 int64_t start_time_ns
;
455 enum BlockAcctType type
;
458 void bdrv_acct_start(BlockDriverState
*bs
, BlockAcctCookie
*cookie
,
459 int64_t bytes
, enum BlockAcctType type
);
460 void bdrv_acct_done(BlockDriverState
*bs
, BlockAcctCookie
*cookie
);
465 BLKDBG_L1_GROW_ALLOC_TABLE
,
466 BLKDBG_L1_GROW_WRITE_TABLE
,
467 BLKDBG_L1_GROW_ACTIVATE_TABLE
,
471 BLKDBG_L2_UPDATE_COMPRESSED
,
472 BLKDBG_L2_ALLOC_COW_READ
,
473 BLKDBG_L2_ALLOC_WRITE
,
476 BLKDBG_READ_BACKING_AIO
,
477 BLKDBG_READ_COMPRESSED
,
480 BLKDBG_WRITE_COMPRESSED
,
488 BLKDBG_REFTABLE_LOAD
,
489 BLKDBG_REFTABLE_GROW
,
490 BLKDBG_REFTABLE_UPDATE
,
492 BLKDBG_REFBLOCK_LOAD
,
493 BLKDBG_REFBLOCK_UPDATE
,
494 BLKDBG_REFBLOCK_UPDATE_PART
,
495 BLKDBG_REFBLOCK_ALLOC
,
496 BLKDBG_REFBLOCK_ALLOC_HOOKUP
,
497 BLKDBG_REFBLOCK_ALLOC_WRITE
,
498 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS
,
499 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE
,
500 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE
,
502 BLKDBG_CLUSTER_ALLOC
,
503 BLKDBG_CLUSTER_ALLOC_BYTES
,
507 BLKDBG_FLUSH_TO_DISK
,
512 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
513 void bdrv_debug_event(BlockDriverState
*bs
, BlkDebugEvent event
);
515 int bdrv_debug_breakpoint(BlockDriverState
*bs
, const char *event
,
517 int bdrv_debug_resume(BlockDriverState
*bs
, const char *tag
);
518 bool bdrv_debug_is_suspended(BlockDriverState
*bs
, const char *tag
);