5 #include "qemu-common.h"
6 #include "qemu/option.h"
7 #include "block/coroutine.h"
8 #include "block/accounting.h"
9 #include "qapi/qmp/qobject.h"
10 #include "qapi-types.h"
13 typedef struct BlockDriver BlockDriver
;
14 typedef struct BlockJob BlockJob
;
16 typedef struct BlockDriverInfo
{
17 /* in bytes, 0 if irrelevant */
19 /* offset at which the VM state can be saved (0 if not possible) */
20 int64_t vm_state_offset
;
23 * True if unallocated blocks read back as zeroes. This is equivalent
24 * to the the LBPRZ flag in the SCSI logical block provisioning page.
26 bool unallocated_blocks_are_zero
;
28 * True if the driver can optimize writing zeroes by unmapping
29 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
30 * with the difference that in qemu a discard is allowed to silently
31 * fail. Therefore we have to use bdrv_write_zeroes with the
32 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
33 * After this call the driver has to guarantee that the contents read
34 * back as zero. It is additionally required that the block device is
35 * opened with BDRV_O_UNMAP flag for this to work.
37 bool can_write_zeroes_with_unmap
;
39 * True if this block driver only supports compressed writes
41 bool needs_compressed_writes
;
44 typedef struct BlockFragInfo
{
45 uint64_t allocated_clusters
;
46 uint64_t total_clusters
;
47 uint64_t fragmented_clusters
;
48 uint64_t compressed_clusters
;
52 BDRV_REQ_COPY_ON_READ
= 0x1,
53 BDRV_REQ_ZERO_WRITE
= 0x2,
54 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver
55 * is allowed to optimize a write zeroes request by unmapping (discarding)
56 * blocks if it is guaranteed that the result will read back as
57 * zeroes. The flag is only passed to the driver if the block device is
58 * opened with BDRV_O_UNMAP.
60 BDRV_REQ_MAY_UNMAP
= 0x4,
63 #define BDRV_O_RDWR 0x0002
64 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
65 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
66 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
67 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
68 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
69 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
70 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
71 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
72 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */
73 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
74 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
75 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */
76 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
77 select an appropriate protocol driver,
78 ignoring the format layer */
80 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
82 #define BDRV_SECTOR_BITS 9
83 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
84 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
87 * Allocation status flags
88 * BDRV_BLOCK_DATA: data is read from bs->file or another file
89 * BDRV_BLOCK_ZERO: sectors read as zero
90 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
91 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this
92 * layer (as opposed to the backing file)
93 * BDRV_BLOCK_RAW: used internally to indicate that the request
94 * was answered by the raw driver and that one
95 * should look in bs->file directly.
97 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
98 * bs->file where sector data can be read from as raw data.
100 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
102 * DATA ZERO OFFSET_VALID
103 * t t t sectors read as zero, bs->file is zero at offset
104 * t f t sectors read as valid from bs->file at offset
105 * f t t sectors preallocated, read as zero, bs->file not
106 * necessarily zero at offset
107 * f f t sectors preallocated but read from backing_hd,
108 * bs->file contains garbage at offset
109 * t t f sectors preallocated, read as zero, unknown offset
110 * t f f sectors read from unknown file or offset
111 * f t f not allocated or unknown offset, read as zero
112 * f f f not allocated or unknown offset, read from backing_hd
114 #define BDRV_BLOCK_DATA 0x01
115 #define BDRV_BLOCK_ZERO 0x02
116 #define BDRV_BLOCK_OFFSET_VALID 0x04
117 #define BDRV_BLOCK_RAW 0x08
118 #define BDRV_BLOCK_ALLOCATED 0x10
119 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
121 typedef QSIMPLEQ_HEAD(BlockReopenQueue
, BlockReopenQueueEntry
) BlockReopenQueue
;
123 typedef struct BDRVReopenState
{
124 BlockDriverState
*bs
;
130 * Block operation types
132 typedef enum BlockOpType
{
133 BLOCK_OP_TYPE_BACKUP_SOURCE
,
134 BLOCK_OP_TYPE_BACKUP_TARGET
,
135 BLOCK_OP_TYPE_CHANGE
,
136 BLOCK_OP_TYPE_COMMIT
,
137 BLOCK_OP_TYPE_DATAPLANE
,
138 BLOCK_OP_TYPE_DRIVE_DEL
,
140 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
141 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
,
142 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
,
143 BLOCK_OP_TYPE_MIRROR
,
144 BLOCK_OP_TYPE_RESIZE
,
145 BLOCK_OP_TYPE_STREAM
,
146 BLOCK_OP_TYPE_REPLACE
,
150 void bdrv_iostatus_enable(BlockDriverState
*bs
);
151 void bdrv_iostatus_reset(BlockDriverState
*bs
);
152 void bdrv_iostatus_disable(BlockDriverState
*bs
);
153 bool bdrv_iostatus_is_enabled(const BlockDriverState
*bs
);
154 void bdrv_iostatus_set_err(BlockDriverState
*bs
, int error
);
155 void bdrv_info_print(Monitor
*mon
, const QObject
*data
);
156 void bdrv_info(Monitor
*mon
, QObject
**ret_data
);
157 void bdrv_stats_print(Monitor
*mon
, const QObject
*data
);
158 void bdrv_info_stats(Monitor
*mon
, QObject
**ret_data
);
160 /* disk I/O throttling */
161 void bdrv_io_limits_enable(BlockDriverState
*bs
);
162 void bdrv_io_limits_disable(BlockDriverState
*bs
);
164 void bdrv_init(void);
165 void bdrv_init_with_whitelist(void);
166 BlockDriver
*bdrv_find_protocol(const char *filename
,
167 bool allow_protocol_prefix
);
168 BlockDriver
*bdrv_find_format(const char *format_name
);
169 BlockDriver
*bdrv_find_whitelisted_format(const char *format_name
,
171 int bdrv_create(BlockDriver
*drv
, const char* filename
,
172 QemuOpts
*opts
, Error
**errp
);
173 int bdrv_create_file(const char *filename
, QemuOpts
*opts
, Error
**errp
);
174 BlockDriverState
*bdrv_new_root(void);
175 BlockDriverState
*bdrv_new(void);
176 void bdrv_make_anon(BlockDriverState
*bs
);
177 void bdrv_swap(BlockDriverState
*bs_new
, BlockDriverState
*bs_old
);
178 void bdrv_append(BlockDriverState
*bs_new
, BlockDriverState
*bs_top
);
179 int bdrv_parse_cache_flags(const char *mode
, int *flags
);
180 int bdrv_parse_discard_flags(const char *mode
, int *flags
);
181 int bdrv_open_image(BlockDriverState
**pbs
, const char *filename
,
182 QDict
*options
, const char *bdref_key
, int flags
,
183 bool allow_none
, Error
**errp
);
184 void bdrv_set_backing_hd(BlockDriverState
*bs
, BlockDriverState
*backing_hd
);
185 int bdrv_open_backing_file(BlockDriverState
*bs
, QDict
*options
, Error
**errp
);
186 int bdrv_append_temp_snapshot(BlockDriverState
*bs
, int flags
, Error
**errp
);
187 int bdrv_open(BlockDriverState
**pbs
, const char *filename
,
188 const char *reference
, QDict
*options
, int flags
,
189 BlockDriver
*drv
, Error
**errp
);
190 BlockReopenQueue
*bdrv_reopen_queue(BlockReopenQueue
*bs_queue
,
191 BlockDriverState
*bs
, int flags
);
192 int bdrv_reopen_multiple(BlockReopenQueue
*bs_queue
, Error
**errp
);
193 int bdrv_reopen(BlockDriverState
*bs
, int bdrv_flags
, Error
**errp
);
194 int bdrv_reopen_prepare(BDRVReopenState
*reopen_state
,
195 BlockReopenQueue
*queue
, Error
**errp
);
196 void bdrv_reopen_commit(BDRVReopenState
*reopen_state
);
197 void bdrv_reopen_abort(BDRVReopenState
*reopen_state
);
198 void bdrv_close(BlockDriverState
*bs
);
199 void bdrv_add_close_notifier(BlockDriverState
*bs
, Notifier
*notify
);
200 int bdrv_read(BlockDriverState
*bs
, int64_t sector_num
,
201 uint8_t *buf
, int nb_sectors
);
202 int bdrv_read_unthrottled(BlockDriverState
*bs
, int64_t sector_num
,
203 uint8_t *buf
, int nb_sectors
);
204 int bdrv_write(BlockDriverState
*bs
, int64_t sector_num
,
205 const uint8_t *buf
, int nb_sectors
);
206 int bdrv_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
207 int nb_sectors
, BdrvRequestFlags flags
);
208 BlockAIOCB
*bdrv_aio_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
209 int nb_sectors
, BdrvRequestFlags flags
,
210 BlockCompletionFunc
*cb
, void *opaque
);
211 int bdrv_make_zero(BlockDriverState
*bs
, BdrvRequestFlags flags
);
212 int bdrv_pread(BlockDriverState
*bs
, int64_t offset
,
213 void *buf
, int count
);
214 int bdrv_pwrite(BlockDriverState
*bs
, int64_t offset
,
215 const void *buf
, int count
);
216 int bdrv_pwritev(BlockDriverState
*bs
, int64_t offset
, QEMUIOVector
*qiov
);
217 int bdrv_pwrite_sync(BlockDriverState
*bs
, int64_t offset
,
218 const void *buf
, int count
);
219 int coroutine_fn
bdrv_co_readv(BlockDriverState
*bs
, int64_t sector_num
,
220 int nb_sectors
, QEMUIOVector
*qiov
);
221 int coroutine_fn
bdrv_co_copy_on_readv(BlockDriverState
*bs
,
222 int64_t sector_num
, int nb_sectors
, QEMUIOVector
*qiov
);
223 int coroutine_fn
bdrv_co_writev(BlockDriverState
*bs
, int64_t sector_num
,
224 int nb_sectors
, QEMUIOVector
*qiov
);
226 * Efficiently zero a region of the disk image. Note that this is a regular
227 * I/O request like read or write and should have a reasonable size. This
228 * function is not suitable for zeroing the entire image in a single request
229 * because it may allocate memory for the entire region.
231 int coroutine_fn
bdrv_co_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
232 int nb_sectors
, BdrvRequestFlags flags
);
233 BlockDriverState
*bdrv_find_backing_image(BlockDriverState
*bs
,
234 const char *backing_file
);
235 int bdrv_get_backing_file_depth(BlockDriverState
*bs
);
236 void bdrv_refresh_filename(BlockDriverState
*bs
);
237 int bdrv_truncate(BlockDriverState
*bs
, int64_t offset
);
238 int64_t bdrv_nb_sectors(BlockDriverState
*bs
);
239 int64_t bdrv_getlength(BlockDriverState
*bs
);
240 int64_t bdrv_get_allocated_file_size(BlockDriverState
*bs
);
241 void bdrv_get_geometry(BlockDriverState
*bs
, uint64_t *nb_sectors_ptr
);
242 void bdrv_refresh_limits(BlockDriverState
*bs
, Error
**errp
);
243 int bdrv_commit(BlockDriverState
*bs
);
244 int bdrv_commit_all(void);
245 int bdrv_change_backing_file(BlockDriverState
*bs
,
246 const char *backing_file
, const char *backing_fmt
);
247 void bdrv_register(BlockDriver
*bdrv
);
248 int bdrv_drop_intermediate(BlockDriverState
*active
, BlockDriverState
*top
,
249 BlockDriverState
*base
,
250 const char *backing_file_str
);
251 BlockDriverState
*bdrv_find_overlay(BlockDriverState
*active
,
252 BlockDriverState
*bs
);
253 BlockDriverState
*bdrv_find_base(BlockDriverState
*bs
);
256 typedef struct BdrvCheckResult
{
260 int corruptions_fixed
;
262 int64_t image_end_offset
;
271 int bdrv_check(BlockDriverState
*bs
, BdrvCheckResult
*res
, BdrvCheckMode fix
);
273 /* The units of offset and total_work_size may be chosen arbitrarily by the
274 * block driver; total_work_size may change during the course of the amendment
276 typedef void BlockDriverAmendStatusCB(BlockDriverState
*bs
, int64_t offset
,
277 int64_t total_work_size
);
278 int bdrv_amend_options(BlockDriverState
*bs_new
, QemuOpts
*opts
,
279 BlockDriverAmendStatusCB
*status_cb
);
281 /* external snapshots */
282 bool bdrv_recurse_is_first_non_filter(BlockDriverState
*bs
,
283 BlockDriverState
*candidate
);
284 bool bdrv_is_first_non_filter(BlockDriverState
*candidate
);
286 /* check if a named node can be replaced when doing drive-mirror */
287 BlockDriverState
*check_to_replace_node(const char *node_name
, Error
**errp
);
289 /* async block I/O */
290 typedef void BlockDriverDirtyHandler(BlockDriverState
*bs
, int64_t sector
,
292 BlockAIOCB
*bdrv_aio_readv(BlockDriverState
*bs
, int64_t sector_num
,
293 QEMUIOVector
*iov
, int nb_sectors
,
294 BlockCompletionFunc
*cb
, void *opaque
);
295 BlockAIOCB
*bdrv_aio_writev(BlockDriverState
*bs
, int64_t sector_num
,
296 QEMUIOVector
*iov
, int nb_sectors
,
297 BlockCompletionFunc
*cb
, void *opaque
);
298 BlockAIOCB
*bdrv_aio_flush(BlockDriverState
*bs
,
299 BlockCompletionFunc
*cb
, void *opaque
);
300 BlockAIOCB
*bdrv_aio_discard(BlockDriverState
*bs
,
301 int64_t sector_num
, int nb_sectors
,
302 BlockCompletionFunc
*cb
, void *opaque
);
303 void bdrv_aio_cancel(BlockAIOCB
*acb
);
304 void bdrv_aio_cancel_async(BlockAIOCB
*acb
);
306 typedef struct BlockRequest
{
307 /* Fields to be filled by multiwrite caller */
312 BlockCompletionFunc
*cb
;
315 /* Filled by multiwrite implementation */
319 int bdrv_aio_multiwrite(BlockDriverState
*bs
, BlockRequest
*reqs
,
322 /* sg packet commands */
323 int bdrv_ioctl(BlockDriverState
*bs
, unsigned long int req
, void *buf
);
324 BlockAIOCB
*bdrv_aio_ioctl(BlockDriverState
*bs
,
325 unsigned long int req
, void *buf
,
326 BlockCompletionFunc
*cb
, void *opaque
);
328 /* Invalidate any cached metadata used by image formats */
329 void bdrv_invalidate_cache(BlockDriverState
*bs
, Error
**errp
);
330 void bdrv_invalidate_cache_all(Error
**errp
);
332 /* Ensure contents are flushed to disk. */
333 int bdrv_flush(BlockDriverState
*bs
);
334 int coroutine_fn
bdrv_co_flush(BlockDriverState
*bs
);
335 int bdrv_flush_all(void);
336 void bdrv_close_all(void);
337 void bdrv_drain(BlockDriverState
*bs
);
338 void bdrv_drain_all(void);
340 int bdrv_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
341 int bdrv_co_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
342 int bdrv_has_zero_init_1(BlockDriverState
*bs
);
343 int bdrv_has_zero_init(BlockDriverState
*bs
);
344 bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs
);
345 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState
*bs
);
346 int64_t bdrv_get_block_status(BlockDriverState
*bs
, int64_t sector_num
,
347 int nb_sectors
, int *pnum
);
348 int bdrv_is_allocated(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
350 int bdrv_is_allocated_above(BlockDriverState
*top
, BlockDriverState
*base
,
351 int64_t sector_num
, int nb_sectors
, int *pnum
);
353 void bdrv_set_on_error(BlockDriverState
*bs
, BlockdevOnError on_read_error
,
354 BlockdevOnError on_write_error
);
355 BlockdevOnError
bdrv_get_on_error(BlockDriverState
*bs
, bool is_read
);
356 BlockErrorAction
bdrv_get_error_action(BlockDriverState
*bs
, bool is_read
, int error
);
357 void bdrv_error_action(BlockDriverState
*bs
, BlockErrorAction action
,
358 bool is_read
, int error
);
359 int bdrv_is_read_only(BlockDriverState
*bs
);
360 int bdrv_is_sg(BlockDriverState
*bs
);
361 int bdrv_enable_write_cache(BlockDriverState
*bs
);
362 void bdrv_set_enable_write_cache(BlockDriverState
*bs
, bool wce
);
363 int bdrv_is_inserted(BlockDriverState
*bs
);
364 int bdrv_media_changed(BlockDriverState
*bs
);
365 void bdrv_lock_medium(BlockDriverState
*bs
, bool locked
);
366 void bdrv_eject(BlockDriverState
*bs
, bool eject_flag
);
367 const char *bdrv_get_format_name(BlockDriverState
*bs
);
368 BlockDriverState
*bdrv_find(const char *name
);
369 BlockDriverState
*bdrv_find_node(const char *node_name
);
370 BlockDeviceInfoList
*bdrv_named_nodes_list(void);
371 BlockDriverState
*bdrv_lookup_bs(const char *device
,
372 const char *node_name
,
374 bool bdrv_chain_contains(BlockDriverState
*top
, BlockDriverState
*base
);
375 BlockDriverState
*bdrv_next_node(BlockDriverState
*bs
);
376 BlockDriverState
*bdrv_next(BlockDriverState
*bs
);
377 int bdrv_is_encrypted(BlockDriverState
*bs
);
378 int bdrv_key_required(BlockDriverState
*bs
);
379 int bdrv_set_key(BlockDriverState
*bs
, const char *key
);
380 int bdrv_query_missing_keys(void);
381 void bdrv_iterate_format(void (*it
)(void *opaque
, const char *name
),
383 const char *bdrv_get_node_name(const BlockDriverState
*bs
);
384 const char *bdrv_get_device_name(const BlockDriverState
*bs
);
385 int bdrv_get_flags(BlockDriverState
*bs
);
386 int bdrv_write_compressed(BlockDriverState
*bs
, int64_t sector_num
,
387 const uint8_t *buf
, int nb_sectors
);
388 int bdrv_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
);
389 ImageInfoSpecific
*bdrv_get_specific_info(BlockDriverState
*bs
);
390 void bdrv_round_to_clusters(BlockDriverState
*bs
,
391 int64_t sector_num
, int nb_sectors
,
392 int64_t *cluster_sector_num
,
393 int *cluster_nb_sectors
);
395 const char *bdrv_get_encrypted_filename(BlockDriverState
*bs
);
396 void bdrv_get_backing_filename(BlockDriverState
*bs
,
397 char *filename
, int filename_size
);
398 void bdrv_get_full_backing_filename(BlockDriverState
*bs
,
399 char *dest
, size_t sz
);
400 int bdrv_is_snapshot(BlockDriverState
*bs
);
402 int path_has_protocol(const char *path
);
403 int path_is_absolute(const char *path
);
404 void path_combine(char *dest
, int dest_size
,
405 const char *base_path
,
406 const char *filename
);
408 int bdrv_writev_vmstate(BlockDriverState
*bs
, QEMUIOVector
*qiov
, int64_t pos
);
409 int bdrv_save_vmstate(BlockDriverState
*bs
, const uint8_t *buf
,
410 int64_t pos
, int size
);
412 int bdrv_load_vmstate(BlockDriverState
*bs
, uint8_t *buf
,
413 int64_t pos
, int size
);
415 void bdrv_img_create(const char *filename
, const char *fmt
,
416 const char *base_filename
, const char *base_fmt
,
417 char *options
, uint64_t img_size
, int flags
,
418 Error
**errp
, bool quiet
);
420 /* Returns the alignment in bytes that is required so that no bounce buffer
421 * is required throughout the stack */
422 size_t bdrv_opt_mem_align(BlockDriverState
*bs
);
423 void bdrv_set_guest_block_size(BlockDriverState
*bs
, int align
);
424 void *qemu_blockalign(BlockDriverState
*bs
, size_t size
);
425 void *qemu_blockalign0(BlockDriverState
*bs
, size_t size
);
426 void *qemu_try_blockalign(BlockDriverState
*bs
, size_t size
);
427 void *qemu_try_blockalign0(BlockDriverState
*bs
, size_t size
);
428 bool bdrv_qiov_is_aligned(BlockDriverState
*bs
, QEMUIOVector
*qiov
);
431 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap
;
432 BdrvDirtyBitmap
*bdrv_create_dirty_bitmap(BlockDriverState
*bs
, int granularity
,
434 void bdrv_release_dirty_bitmap(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
);
435 BlockDirtyInfoList
*bdrv_query_dirty_bitmaps(BlockDriverState
*bs
);
436 int bdrv_get_dirty(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
, int64_t sector
);
437 void bdrv_set_dirty(BlockDriverState
*bs
, int64_t cur_sector
, int nr_sectors
);
438 void bdrv_reset_dirty(BlockDriverState
*bs
, int64_t cur_sector
, int nr_sectors
);
439 void bdrv_dirty_iter_init(BlockDriverState
*bs
,
440 BdrvDirtyBitmap
*bitmap
, struct HBitmapIter
*hbi
);
441 int64_t bdrv_get_dirty_count(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
);
443 void bdrv_enable_copy_on_read(BlockDriverState
*bs
);
444 void bdrv_disable_copy_on_read(BlockDriverState
*bs
);
446 void bdrv_ref(BlockDriverState
*bs
);
447 void bdrv_unref(BlockDriverState
*bs
);
449 bool bdrv_op_is_blocked(BlockDriverState
*bs
, BlockOpType op
, Error
**errp
);
450 void bdrv_op_block(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
451 void bdrv_op_unblock(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
452 void bdrv_op_block_all(BlockDriverState
*bs
, Error
*reason
);
453 void bdrv_op_unblock_all(BlockDriverState
*bs
, Error
*reason
);
454 bool bdrv_op_blocker_is_empty(BlockDriverState
*bs
);
459 BLKDBG_L1_GROW_ALLOC_TABLE
,
460 BLKDBG_L1_GROW_WRITE_TABLE
,
461 BLKDBG_L1_GROW_ACTIVATE_TABLE
,
465 BLKDBG_L2_UPDATE_COMPRESSED
,
466 BLKDBG_L2_ALLOC_COW_READ
,
467 BLKDBG_L2_ALLOC_WRITE
,
470 BLKDBG_READ_BACKING_AIO
,
471 BLKDBG_READ_COMPRESSED
,
474 BLKDBG_WRITE_COMPRESSED
,
482 BLKDBG_REFTABLE_LOAD
,
483 BLKDBG_REFTABLE_GROW
,
484 BLKDBG_REFTABLE_UPDATE
,
486 BLKDBG_REFBLOCK_LOAD
,
487 BLKDBG_REFBLOCK_UPDATE
,
488 BLKDBG_REFBLOCK_UPDATE_PART
,
489 BLKDBG_REFBLOCK_ALLOC
,
490 BLKDBG_REFBLOCK_ALLOC_HOOKUP
,
491 BLKDBG_REFBLOCK_ALLOC_WRITE
,
492 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS
,
493 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE
,
494 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE
,
496 BLKDBG_CLUSTER_ALLOC
,
497 BLKDBG_CLUSTER_ALLOC_BYTES
,
501 BLKDBG_FLUSH_TO_DISK
,
503 BLKDBG_PWRITEV_RMW_HEAD
,
504 BLKDBG_PWRITEV_RMW_AFTER_HEAD
,
505 BLKDBG_PWRITEV_RMW_TAIL
,
506 BLKDBG_PWRITEV_RMW_AFTER_TAIL
,
511 BLKDBG_EMPTY_IMAGE_PREPARE
,
516 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
517 void bdrv_debug_event(BlockDriverState
*bs
, BlkDebugEvent event
);
519 int bdrv_debug_breakpoint(BlockDriverState
*bs
, const char *event
,
521 int bdrv_debug_remove_breakpoint(BlockDriverState
*bs
, const char *tag
);
522 int bdrv_debug_resume(BlockDriverState
*bs
, const char *tag
);
523 bool bdrv_debug_is_suspended(BlockDriverState
*bs
, const char *tag
);
526 * bdrv_get_aio_context:
528 * Returns: the currently bound #AioContext
530 AioContext
*bdrv_get_aio_context(BlockDriverState
*bs
);
533 * bdrv_set_aio_context:
535 * Changes the #AioContext used for fd handlers, timers, and BHs by this
536 * BlockDriverState and all its children.
538 * This function must be called from the old #AioContext or with a lock held so
539 * the old #AioContext is not executing.
541 void bdrv_set_aio_context(BlockDriverState
*bs
, AioContext
*new_context
);
543 void bdrv_io_plug(BlockDriverState
*bs
);
544 void bdrv_io_unplug(BlockDriverState
*bs
);
545 void bdrv_flush_io_queue(BlockDriverState
*bs
);
547 BlockAcctStats
*bdrv_get_stats(BlockDriverState
*bs
);