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
;
15 typedef struct BdrvChildRole BdrvChildRole
;
17 typedef struct BlockDriverInfo
{
18 /* in bytes, 0 if irrelevant */
20 /* offset at which the VM state can be saved (0 if not possible) */
21 int64_t vm_state_offset
;
24 * True if unallocated blocks read back as zeroes. This is equivalent
25 * to the the LBPRZ flag in the SCSI logical block provisioning page.
27 bool unallocated_blocks_are_zero
;
29 * True if the driver can optimize writing zeroes by unmapping
30 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
31 * with the difference that in qemu a discard is allowed to silently
32 * fail. Therefore we have to use bdrv_write_zeroes with the
33 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
34 * After this call the driver has to guarantee that the contents read
35 * back as zero. It is additionally required that the block device is
36 * opened with BDRV_O_UNMAP flag for this to work.
38 bool can_write_zeroes_with_unmap
;
40 * True if this block driver only supports compressed writes
42 bool needs_compressed_writes
;
45 typedef struct BlockFragInfo
{
46 uint64_t allocated_clusters
;
47 uint64_t total_clusters
;
48 uint64_t fragmented_clusters
;
49 uint64_t compressed_clusters
;
53 BDRV_REQ_COPY_ON_READ
= 0x1,
54 BDRV_REQ_ZERO_WRITE
= 0x2,
55 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver
56 * is allowed to optimize a write zeroes request by unmapping (discarding)
57 * blocks if it is guaranteed that the result will read back as
58 * zeroes. The flag is only passed to the driver if the block device is
59 * opened with BDRV_O_UNMAP.
61 BDRV_REQ_MAY_UNMAP
= 0x4,
64 typedef struct BlockSizes
{
69 typedef struct HDGeometry
{
75 #define BDRV_O_RDWR 0x0002
76 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
77 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
78 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
79 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
80 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
81 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
82 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
83 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
84 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */
85 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
86 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
87 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */
88 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
89 select an appropriate protocol driver,
90 ignoring the format layer */
92 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
95 /* Option names of options parsed by the block layer */
97 #define BDRV_OPT_CACHE_WB "cache.writeback"
98 #define BDRV_OPT_CACHE_DIRECT "cache.direct"
99 #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush"
102 #define BDRV_SECTOR_BITS 9
103 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
104 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
106 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \
107 INT_MAX >> BDRV_SECTOR_BITS)
110 * Allocation status flags
111 * BDRV_BLOCK_DATA: data is read from bs->file or another file
112 * BDRV_BLOCK_ZERO: sectors read as zero
113 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
114 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this
115 * layer (as opposed to the backing file)
116 * BDRV_BLOCK_RAW: used internally to indicate that the request
117 * was answered by the raw driver and that one
118 * should look in bs->file directly.
120 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
121 * bs->file where sector data can be read from as raw data.
123 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
125 * DATA ZERO OFFSET_VALID
126 * t t t sectors read as zero, bs->file is zero at offset
127 * t f t sectors read as valid from bs->file at offset
128 * f t t sectors preallocated, read as zero, bs->file not
129 * necessarily zero at offset
130 * f f t sectors preallocated but read from backing_hd,
131 * bs->file contains garbage at offset
132 * t t f sectors preallocated, read as zero, unknown offset
133 * t f f sectors read from unknown file or offset
134 * f t f not allocated or unknown offset, read as zero
135 * f f f not allocated or unknown offset, read from backing_hd
137 #define BDRV_BLOCK_DATA 0x01
138 #define BDRV_BLOCK_ZERO 0x02
139 #define BDRV_BLOCK_OFFSET_VALID 0x04
140 #define BDRV_BLOCK_RAW 0x08
141 #define BDRV_BLOCK_ALLOCATED 0x10
142 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
144 typedef QSIMPLEQ_HEAD(BlockReopenQueue
, BlockReopenQueueEntry
) BlockReopenQueue
;
146 typedef struct BDRVReopenState
{
147 BlockDriverState
*bs
;
153 * Block operation types
155 typedef enum BlockOpType
{
156 BLOCK_OP_TYPE_BACKUP_SOURCE
,
157 BLOCK_OP_TYPE_BACKUP_TARGET
,
158 BLOCK_OP_TYPE_CHANGE
,
159 BLOCK_OP_TYPE_COMMIT_SOURCE
,
160 BLOCK_OP_TYPE_COMMIT_TARGET
,
161 BLOCK_OP_TYPE_DATAPLANE
,
162 BLOCK_OP_TYPE_DRIVE_DEL
,
164 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
165 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
,
166 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
,
167 BLOCK_OP_TYPE_MIRROR
,
168 BLOCK_OP_TYPE_RESIZE
,
169 BLOCK_OP_TYPE_STREAM
,
170 BLOCK_OP_TYPE_REPLACE
,
174 void bdrv_iostatus_enable(BlockDriverState
*bs
);
175 void bdrv_iostatus_reset(BlockDriverState
*bs
);
176 void bdrv_iostatus_disable(BlockDriverState
*bs
);
177 bool bdrv_iostatus_is_enabled(const BlockDriverState
*bs
);
178 void bdrv_iostatus_set_err(BlockDriverState
*bs
, int error
);
179 void bdrv_info_print(Monitor
*mon
, const QObject
*data
);
180 void bdrv_info(Monitor
*mon
, QObject
**ret_data
);
181 void bdrv_stats_print(Monitor
*mon
, const QObject
*data
);
182 void bdrv_info_stats(Monitor
*mon
, QObject
**ret_data
);
184 /* disk I/O throttling */
185 void bdrv_io_limits_enable(BlockDriverState
*bs
, const char *group
);
186 void bdrv_io_limits_disable(BlockDriverState
*bs
);
187 void bdrv_io_limits_update_group(BlockDriverState
*bs
, const char *group
);
189 void bdrv_init(void);
190 void bdrv_init_with_whitelist(void);
191 BlockDriver
*bdrv_find_protocol(const char *filename
,
192 bool allow_protocol_prefix
,
194 BlockDriver
*bdrv_find_format(const char *format_name
);
195 BlockDriver
*bdrv_find_whitelisted_format(const char *format_name
,
197 int bdrv_create(BlockDriver
*drv
, const char* filename
,
198 QemuOpts
*opts
, Error
**errp
);
199 int bdrv_create_file(const char *filename
, QemuOpts
*opts
, Error
**errp
);
200 BlockDriverState
*bdrv_new_root(void);
201 BlockDriverState
*bdrv_new(void);
202 void bdrv_make_anon(BlockDriverState
*bs
);
203 void bdrv_swap(BlockDriverState
*bs_new
, BlockDriverState
*bs_old
);
204 void bdrv_append(BlockDriverState
*bs_new
, BlockDriverState
*bs_top
);
205 int bdrv_parse_cache_flags(const char *mode
, int *flags
);
206 int bdrv_parse_discard_flags(const char *mode
, int *flags
);
207 int bdrv_open_image(BlockDriverState
**pbs
, const char *filename
,
208 QDict
*options
, const char *bdref_key
,
209 BlockDriverState
* parent
, const BdrvChildRole
*child_role
,
210 bool allow_none
, Error
**errp
);
211 void bdrv_set_backing_hd(BlockDriverState
*bs
, BlockDriverState
*backing_hd
);
212 int bdrv_open_backing_file(BlockDriverState
*bs
, QDict
*options
, Error
**errp
);
213 int bdrv_append_temp_snapshot(BlockDriverState
*bs
, int flags
, Error
**errp
);
214 int bdrv_open(BlockDriverState
**pbs
, const char *filename
,
215 const char *reference
, QDict
*options
, int flags
,
216 BlockDriver
*drv
, Error
**errp
);
217 BlockReopenQueue
*bdrv_reopen_queue(BlockReopenQueue
*bs_queue
,
218 BlockDriverState
*bs
, int flags
);
219 int bdrv_reopen_multiple(BlockReopenQueue
*bs_queue
, Error
**errp
);
220 int bdrv_reopen(BlockDriverState
*bs
, int bdrv_flags
, Error
**errp
);
221 int bdrv_reopen_prepare(BDRVReopenState
*reopen_state
,
222 BlockReopenQueue
*queue
, Error
**errp
);
223 void bdrv_reopen_commit(BDRVReopenState
*reopen_state
);
224 void bdrv_reopen_abort(BDRVReopenState
*reopen_state
);
225 void bdrv_close(BlockDriverState
*bs
);
226 void bdrv_add_close_notifier(BlockDriverState
*bs
, Notifier
*notify
);
227 int bdrv_read(BlockDriverState
*bs
, int64_t sector_num
,
228 uint8_t *buf
, int nb_sectors
);
229 int bdrv_read_unthrottled(BlockDriverState
*bs
, int64_t sector_num
,
230 uint8_t *buf
, int nb_sectors
);
231 int bdrv_write(BlockDriverState
*bs
, int64_t sector_num
,
232 const uint8_t *buf
, int nb_sectors
);
233 int bdrv_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
234 int nb_sectors
, BdrvRequestFlags flags
);
235 BlockAIOCB
*bdrv_aio_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
236 int nb_sectors
, BdrvRequestFlags flags
,
237 BlockCompletionFunc
*cb
, void *opaque
);
238 int bdrv_make_zero(BlockDriverState
*bs
, BdrvRequestFlags flags
);
239 int bdrv_pread(BlockDriverState
*bs
, int64_t offset
,
240 void *buf
, int count
);
241 int bdrv_pwrite(BlockDriverState
*bs
, int64_t offset
,
242 const void *buf
, int count
);
243 int bdrv_pwritev(BlockDriverState
*bs
, int64_t offset
, QEMUIOVector
*qiov
);
244 int bdrv_pwrite_sync(BlockDriverState
*bs
, int64_t offset
,
245 const void *buf
, int count
);
246 int coroutine_fn
bdrv_co_readv(BlockDriverState
*bs
, int64_t sector_num
,
247 int nb_sectors
, QEMUIOVector
*qiov
);
248 int coroutine_fn
bdrv_co_copy_on_readv(BlockDriverState
*bs
,
249 int64_t sector_num
, int nb_sectors
, QEMUIOVector
*qiov
);
250 int coroutine_fn
bdrv_co_writev(BlockDriverState
*bs
, int64_t sector_num
,
251 int nb_sectors
, QEMUIOVector
*qiov
);
253 * Efficiently zero a region of the disk image. Note that this is a regular
254 * I/O request like read or write and should have a reasonable size. This
255 * function is not suitable for zeroing the entire image in a single request
256 * because it may allocate memory for the entire region.
258 int coroutine_fn
bdrv_co_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
259 int nb_sectors
, BdrvRequestFlags flags
);
260 BlockDriverState
*bdrv_find_backing_image(BlockDriverState
*bs
,
261 const char *backing_file
);
262 int bdrv_get_backing_file_depth(BlockDriverState
*bs
);
263 void bdrv_refresh_filename(BlockDriverState
*bs
);
264 int bdrv_truncate(BlockDriverState
*bs
, int64_t offset
);
265 int64_t bdrv_nb_sectors(BlockDriverState
*bs
);
266 int64_t bdrv_getlength(BlockDriverState
*bs
);
267 int64_t bdrv_get_allocated_file_size(BlockDriverState
*bs
);
268 void bdrv_get_geometry(BlockDriverState
*bs
, uint64_t *nb_sectors_ptr
);
269 void bdrv_refresh_limits(BlockDriverState
*bs
, Error
**errp
);
270 int bdrv_commit(BlockDriverState
*bs
);
271 int bdrv_commit_all(void);
272 int bdrv_change_backing_file(BlockDriverState
*bs
,
273 const char *backing_file
, const char *backing_fmt
);
274 void bdrv_register(BlockDriver
*bdrv
);
275 int bdrv_drop_intermediate(BlockDriverState
*active
, BlockDriverState
*top
,
276 BlockDriverState
*base
,
277 const char *backing_file_str
);
278 BlockDriverState
*bdrv_find_overlay(BlockDriverState
*active
,
279 BlockDriverState
*bs
);
280 BlockDriverState
*bdrv_find_base(BlockDriverState
*bs
);
283 typedef struct BdrvCheckResult
{
287 int corruptions_fixed
;
289 int64_t image_end_offset
;
298 int bdrv_check(BlockDriverState
*bs
, BdrvCheckResult
*res
, BdrvCheckMode fix
);
300 /* The units of offset and total_work_size may be chosen arbitrarily by the
301 * block driver; total_work_size may change during the course of the amendment
303 typedef void BlockDriverAmendStatusCB(BlockDriverState
*bs
, int64_t offset
,
304 int64_t total_work_size
);
305 int bdrv_amend_options(BlockDriverState
*bs_new
, QemuOpts
*opts
,
306 BlockDriverAmendStatusCB
*status_cb
);
308 /* external snapshots */
309 bool bdrv_recurse_is_first_non_filter(BlockDriverState
*bs
,
310 BlockDriverState
*candidate
);
311 bool bdrv_is_first_non_filter(BlockDriverState
*candidate
);
313 /* check if a named node can be replaced when doing drive-mirror */
314 BlockDriverState
*check_to_replace_node(const char *node_name
, Error
**errp
);
316 /* async block I/O */
317 typedef void BlockDriverDirtyHandler(BlockDriverState
*bs
, int64_t sector
,
319 BlockAIOCB
*bdrv_aio_readv(BlockDriverState
*bs
, int64_t sector_num
,
320 QEMUIOVector
*iov
, int nb_sectors
,
321 BlockCompletionFunc
*cb
, void *opaque
);
322 BlockAIOCB
*bdrv_aio_writev(BlockDriverState
*bs
, int64_t sector_num
,
323 QEMUIOVector
*iov
, int nb_sectors
,
324 BlockCompletionFunc
*cb
, void *opaque
);
325 BlockAIOCB
*bdrv_aio_flush(BlockDriverState
*bs
,
326 BlockCompletionFunc
*cb
, void *opaque
);
327 BlockAIOCB
*bdrv_aio_discard(BlockDriverState
*bs
,
328 int64_t sector_num
, int nb_sectors
,
329 BlockCompletionFunc
*cb
, void *opaque
);
330 void bdrv_aio_cancel(BlockAIOCB
*acb
);
331 void bdrv_aio_cancel_async(BlockAIOCB
*acb
);
333 typedef struct BlockRequest
{
334 /* Fields to be filled by multiwrite caller */
339 BlockCompletionFunc
*cb
;
342 /* Filled by multiwrite implementation */
346 int bdrv_aio_multiwrite(BlockDriverState
*bs
, BlockRequest
*reqs
,
349 /* sg packet commands */
350 int bdrv_ioctl(BlockDriverState
*bs
, unsigned long int req
, void *buf
);
351 BlockAIOCB
*bdrv_aio_ioctl(BlockDriverState
*bs
,
352 unsigned long int req
, void *buf
,
353 BlockCompletionFunc
*cb
, void *opaque
);
355 /* Invalidate any cached metadata used by image formats */
356 void bdrv_invalidate_cache(BlockDriverState
*bs
, Error
**errp
);
357 void bdrv_invalidate_cache_all(Error
**errp
);
359 /* Ensure contents are flushed to disk. */
360 int bdrv_flush(BlockDriverState
*bs
);
361 int coroutine_fn
bdrv_co_flush(BlockDriverState
*bs
);
362 int bdrv_flush_all(void);
363 void bdrv_close_all(void);
364 void bdrv_drain(BlockDriverState
*bs
);
365 void bdrv_drain_all(void);
367 int bdrv_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
368 int bdrv_co_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
369 int bdrv_has_zero_init_1(BlockDriverState
*bs
);
370 int bdrv_has_zero_init(BlockDriverState
*bs
);
371 bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs
);
372 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState
*bs
);
373 int64_t bdrv_get_block_status(BlockDriverState
*bs
, int64_t sector_num
,
374 int nb_sectors
, int *pnum
);
375 int bdrv_is_allocated(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
377 int bdrv_is_allocated_above(BlockDriverState
*top
, BlockDriverState
*base
,
378 int64_t sector_num
, int nb_sectors
, int *pnum
);
380 void bdrv_set_on_error(BlockDriverState
*bs
, BlockdevOnError on_read_error
,
381 BlockdevOnError on_write_error
);
382 BlockdevOnError
bdrv_get_on_error(BlockDriverState
*bs
, bool is_read
);
383 BlockErrorAction
bdrv_get_error_action(BlockDriverState
*bs
, bool is_read
, int error
);
384 void bdrv_error_action(BlockDriverState
*bs
, BlockErrorAction action
,
385 bool is_read
, int error
);
386 int bdrv_is_read_only(BlockDriverState
*bs
);
387 int bdrv_is_sg(BlockDriverState
*bs
);
388 int bdrv_enable_write_cache(BlockDriverState
*bs
);
389 void bdrv_set_enable_write_cache(BlockDriverState
*bs
, bool wce
);
390 int bdrv_is_inserted(BlockDriverState
*bs
);
391 int bdrv_media_changed(BlockDriverState
*bs
);
392 void bdrv_lock_medium(BlockDriverState
*bs
, bool locked
);
393 void bdrv_eject(BlockDriverState
*bs
, bool eject_flag
);
394 const char *bdrv_get_format_name(BlockDriverState
*bs
);
395 BlockDriverState
*bdrv_find_node(const char *node_name
);
396 BlockDeviceInfoList
*bdrv_named_nodes_list(Error
**errp
);
397 BlockDriverState
*bdrv_lookup_bs(const char *device
,
398 const char *node_name
,
400 bool bdrv_chain_contains(BlockDriverState
*top
, BlockDriverState
*base
);
401 BlockDriverState
*bdrv_next_node(BlockDriverState
*bs
);
402 BlockDriverState
*bdrv_next(BlockDriverState
*bs
);
403 int bdrv_is_encrypted(BlockDriverState
*bs
);
404 int bdrv_key_required(BlockDriverState
*bs
);
405 int bdrv_set_key(BlockDriverState
*bs
, const char *key
);
406 void bdrv_add_key(BlockDriverState
*bs
, const char *key
, Error
**errp
);
407 int bdrv_query_missing_keys(void);
408 void bdrv_iterate_format(void (*it
)(void *opaque
, const char *name
),
410 const char *bdrv_get_node_name(const BlockDriverState
*bs
);
411 const char *bdrv_get_device_name(const BlockDriverState
*bs
);
412 const char *bdrv_get_device_or_node_name(const BlockDriverState
*bs
);
413 int bdrv_get_flags(BlockDriverState
*bs
);
414 int bdrv_write_compressed(BlockDriverState
*bs
, int64_t sector_num
,
415 const uint8_t *buf
, int nb_sectors
);
416 int bdrv_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
);
417 ImageInfoSpecific
*bdrv_get_specific_info(BlockDriverState
*bs
);
418 void bdrv_round_to_clusters(BlockDriverState
*bs
,
419 int64_t sector_num
, int nb_sectors
,
420 int64_t *cluster_sector_num
,
421 int *cluster_nb_sectors
);
423 const char *bdrv_get_encrypted_filename(BlockDriverState
*bs
);
424 void bdrv_get_backing_filename(BlockDriverState
*bs
,
425 char *filename
, int filename_size
);
426 void bdrv_get_full_backing_filename(BlockDriverState
*bs
,
427 char *dest
, size_t sz
, Error
**errp
);
428 void bdrv_get_full_backing_filename_from_filename(const char *backed
,
430 char *dest
, size_t sz
,
432 int bdrv_is_snapshot(BlockDriverState
*bs
);
434 int path_has_protocol(const char *path
);
435 int path_is_absolute(const char *path
);
436 void path_combine(char *dest
, int dest_size
,
437 const char *base_path
,
438 const char *filename
);
440 int bdrv_writev_vmstate(BlockDriverState
*bs
, QEMUIOVector
*qiov
, int64_t pos
);
441 int bdrv_save_vmstate(BlockDriverState
*bs
, const uint8_t *buf
,
442 int64_t pos
, int size
);
444 int bdrv_load_vmstate(BlockDriverState
*bs
, uint8_t *buf
,
445 int64_t pos
, int size
);
447 void bdrv_img_create(const char *filename
, const char *fmt
,
448 const char *base_filename
, const char *base_fmt
,
449 char *options
, uint64_t img_size
, int flags
,
450 Error
**errp
, bool quiet
);
452 /* Returns the alignment in bytes that is required so that no bounce buffer
453 * is required throughout the stack */
454 size_t bdrv_min_mem_align(BlockDriverState
*bs
);
455 /* Returns optimal alignment in bytes for bounce buffer */
456 size_t bdrv_opt_mem_align(BlockDriverState
*bs
);
457 void bdrv_set_guest_block_size(BlockDriverState
*bs
, int align
);
458 void *qemu_blockalign(BlockDriverState
*bs
, size_t size
);
459 void *qemu_blockalign0(BlockDriverState
*bs
, size_t size
);
460 void *qemu_try_blockalign(BlockDriverState
*bs
, size_t size
);
461 void *qemu_try_blockalign0(BlockDriverState
*bs
, size_t size
);
462 bool bdrv_qiov_is_aligned(BlockDriverState
*bs
, QEMUIOVector
*qiov
);
465 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap
;
466 BdrvDirtyBitmap
*bdrv_create_dirty_bitmap(BlockDriverState
*bs
,
467 uint32_t granularity
,
470 int bdrv_dirty_bitmap_create_successor(BlockDriverState
*bs
,
471 BdrvDirtyBitmap
*bitmap
,
473 BdrvDirtyBitmap
*bdrv_dirty_bitmap_abdicate(BlockDriverState
*bs
,
474 BdrvDirtyBitmap
*bitmap
,
476 BdrvDirtyBitmap
*bdrv_reclaim_dirty_bitmap(BlockDriverState
*bs
,
477 BdrvDirtyBitmap
*bitmap
,
479 BdrvDirtyBitmap
*bdrv_find_dirty_bitmap(BlockDriverState
*bs
,
481 void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap
*bitmap
);
482 void bdrv_release_dirty_bitmap(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
);
483 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap
*bitmap
);
484 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap
*bitmap
);
485 BlockDirtyInfoList
*bdrv_query_dirty_bitmaps(BlockDriverState
*bs
);
486 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState
*bs
);
487 uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap
*bitmap
);
488 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap
*bitmap
);
489 bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap
*bitmap
);
490 DirtyBitmapStatus
bdrv_dirty_bitmap_status(BdrvDirtyBitmap
*bitmap
);
491 int bdrv_get_dirty(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
, int64_t sector
);
492 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap
*bitmap
,
493 int64_t cur_sector
, int nr_sectors
);
494 void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap
*bitmap
,
495 int64_t cur_sector
, int nr_sectors
);
496 void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap
*bitmap
);
497 void bdrv_dirty_iter_init(BdrvDirtyBitmap
*bitmap
, struct HBitmapIter
*hbi
);
498 void bdrv_set_dirty_iter(struct HBitmapIter
*hbi
, int64_t offset
);
499 int64_t bdrv_get_dirty_count(BdrvDirtyBitmap
*bitmap
);
501 void bdrv_enable_copy_on_read(BlockDriverState
*bs
);
502 void bdrv_disable_copy_on_read(BlockDriverState
*bs
);
504 void bdrv_ref(BlockDriverState
*bs
);
505 void bdrv_unref(BlockDriverState
*bs
);
507 bool bdrv_op_is_blocked(BlockDriverState
*bs
, BlockOpType op
, Error
**errp
);
508 void bdrv_op_block(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
509 void bdrv_op_unblock(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
510 void bdrv_op_block_all(BlockDriverState
*bs
, Error
*reason
);
511 void bdrv_op_unblock_all(BlockDriverState
*bs
, Error
*reason
);
512 bool bdrv_op_blocker_is_empty(BlockDriverState
*bs
);
517 BLKDBG_L1_GROW_ALLOC_TABLE
,
518 BLKDBG_L1_GROW_WRITE_TABLE
,
519 BLKDBG_L1_GROW_ACTIVATE_TABLE
,
523 BLKDBG_L2_UPDATE_COMPRESSED
,
524 BLKDBG_L2_ALLOC_COW_READ
,
525 BLKDBG_L2_ALLOC_WRITE
,
528 BLKDBG_READ_BACKING_AIO
,
529 BLKDBG_READ_COMPRESSED
,
532 BLKDBG_WRITE_COMPRESSED
,
540 BLKDBG_REFTABLE_LOAD
,
541 BLKDBG_REFTABLE_GROW
,
542 BLKDBG_REFTABLE_UPDATE
,
544 BLKDBG_REFBLOCK_LOAD
,
545 BLKDBG_REFBLOCK_UPDATE
,
546 BLKDBG_REFBLOCK_UPDATE_PART
,
547 BLKDBG_REFBLOCK_ALLOC
,
548 BLKDBG_REFBLOCK_ALLOC_HOOKUP
,
549 BLKDBG_REFBLOCK_ALLOC_WRITE
,
550 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS
,
551 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE
,
552 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE
,
554 BLKDBG_CLUSTER_ALLOC
,
555 BLKDBG_CLUSTER_ALLOC_BYTES
,
559 BLKDBG_FLUSH_TO_DISK
,
561 BLKDBG_PWRITEV_RMW_HEAD
,
562 BLKDBG_PWRITEV_RMW_AFTER_HEAD
,
563 BLKDBG_PWRITEV_RMW_TAIL
,
564 BLKDBG_PWRITEV_RMW_AFTER_TAIL
,
569 BLKDBG_EMPTY_IMAGE_PREPARE
,
574 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
575 void bdrv_debug_event(BlockDriverState
*bs
, BlkDebugEvent event
);
577 int bdrv_debug_breakpoint(BlockDriverState
*bs
, const char *event
,
579 int bdrv_debug_remove_breakpoint(BlockDriverState
*bs
, const char *tag
);
580 int bdrv_debug_resume(BlockDriverState
*bs
, const char *tag
);
581 bool bdrv_debug_is_suspended(BlockDriverState
*bs
, const char *tag
);
584 * bdrv_get_aio_context:
586 * Returns: the currently bound #AioContext
588 AioContext
*bdrv_get_aio_context(BlockDriverState
*bs
);
591 * bdrv_set_aio_context:
593 * Changes the #AioContext used for fd handlers, timers, and BHs by this
594 * BlockDriverState and all its children.
596 * This function must be called with iothread lock held.
598 void bdrv_set_aio_context(BlockDriverState
*bs
, AioContext
*new_context
);
599 int bdrv_probe_blocksizes(BlockDriverState
*bs
, BlockSizes
*bsz
);
600 int bdrv_probe_geometry(BlockDriverState
*bs
, HDGeometry
*geo
);
602 void bdrv_io_plug(BlockDriverState
*bs
);
603 void bdrv_io_unplug(BlockDriverState
*bs
);
604 void bdrv_flush_io_queue(BlockDriverState
*bs
);
606 BlockAcctStats
*bdrv_get_stats(BlockDriverState
*bs
);