5 #include "qemu-common.h"
6 #include "qemu/option.h"
7 #include "qemu/coroutine.h"
8 #include "block/accounting.h"
9 #include "qapi/qmp/qobject.h"
10 #include "qapi-types.h"
11 #include "qemu/hbitmap.h"
14 typedef struct BlockDriver BlockDriver
;
15 typedef struct BlockJob BlockJob
;
16 typedef struct BdrvChild BdrvChild
;
17 typedef struct BdrvChildRole BdrvChildRole
;
18 typedef struct BlockJobTxn BlockJobTxn
;
20 typedef struct BlockDriverInfo
{
21 /* in bytes, 0 if irrelevant */
23 /* offset at which the VM state can be saved (0 if not possible) */
24 int64_t vm_state_offset
;
27 * True if unallocated blocks read back as zeroes. This is equivalent
28 * to the LBPRZ flag in the SCSI logical block provisioning page.
30 bool unallocated_blocks_are_zero
;
32 * True if the driver can optimize writing zeroes by unmapping
33 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
34 * with the difference that in qemu a discard is allowed to silently
35 * fail. Therefore we have to use bdrv_write_zeroes with the
36 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
37 * After this call the driver has to guarantee that the contents read
38 * back as zero. It is additionally required that the block device is
39 * opened with BDRV_O_UNMAP flag for this to work.
41 bool can_write_zeroes_with_unmap
;
43 * True if this block driver only supports compressed writes
45 bool needs_compressed_writes
;
48 typedef struct BlockFragInfo
{
49 uint64_t allocated_clusters
;
50 uint64_t total_clusters
;
51 uint64_t fragmented_clusters
;
52 uint64_t compressed_clusters
;
56 BDRV_REQ_COPY_ON_READ
= 0x1,
57 BDRV_REQ_ZERO_WRITE
= 0x2,
58 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver
59 * is allowed to optimize a write zeroes request by unmapping (discarding)
60 * blocks if it is guaranteed that the result will read back as
61 * zeroes. The flag is only passed to the driver if the block device is
62 * opened with BDRV_O_UNMAP.
64 BDRV_REQ_MAY_UNMAP
= 0x4,
65 BDRV_REQ_NO_SERIALISING
= 0x8,
68 typedef struct BlockSizes
{
73 typedef struct HDGeometry
{
79 #define BDRV_O_RDWR 0x0002
80 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
81 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
82 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
83 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
84 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
85 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
86 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
87 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
88 #define BDRV_O_INACTIVE 0x0800 /* consistency hint for migration handoff */
89 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
90 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
91 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */
92 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
93 select an appropriate protocol driver,
94 ignoring the format layer */
96 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
99 /* Option names of options parsed by the block layer */
101 #define BDRV_OPT_CACHE_WB "cache.writeback"
102 #define BDRV_OPT_CACHE_DIRECT "cache.direct"
103 #define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush"
106 #define BDRV_SECTOR_BITS 9
107 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
108 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
110 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \
111 INT_MAX >> BDRV_SECTOR_BITS)
114 * Allocation status flags
115 * BDRV_BLOCK_DATA: data is read from a file returned by bdrv_get_block_status.
116 * BDRV_BLOCK_ZERO: sectors read as zero
117 * BDRV_BLOCK_OFFSET_VALID: sector stored as raw data in a file returned by
118 * bdrv_get_block_status.
119 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this
120 * layer (as opposed to the backing file)
121 * BDRV_BLOCK_RAW: used internally to indicate that the request
122 * was answered by the raw driver and that one
123 * should look in bs->file directly.
125 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
126 * bs->file where sector data can be read from as raw data.
128 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
130 * DATA ZERO OFFSET_VALID
131 * t t t sectors read as zero, bs->file is zero at offset
132 * t f t sectors read as valid from bs->file at offset
133 * f t t sectors preallocated, read as zero, bs->file not
134 * necessarily zero at offset
135 * f f t sectors preallocated but read from backing_hd,
136 * bs->file contains garbage at offset
137 * t t f sectors preallocated, read as zero, unknown offset
138 * t f f sectors read from unknown file or offset
139 * f t f not allocated or unknown offset, read as zero
140 * f f f not allocated or unknown offset, read from backing_hd
142 #define BDRV_BLOCK_DATA 0x01
143 #define BDRV_BLOCK_ZERO 0x02
144 #define BDRV_BLOCK_OFFSET_VALID 0x04
145 #define BDRV_BLOCK_RAW 0x08
146 #define BDRV_BLOCK_ALLOCATED 0x10
147 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
149 typedef QSIMPLEQ_HEAD(BlockReopenQueue
, BlockReopenQueueEntry
) BlockReopenQueue
;
151 typedef struct BDRVReopenState
{
152 BlockDriverState
*bs
;
155 QDict
*explicit_options
;
160 * Block operation types
162 typedef enum BlockOpType
{
163 BLOCK_OP_TYPE_BACKUP_SOURCE
,
164 BLOCK_OP_TYPE_BACKUP_TARGET
,
165 BLOCK_OP_TYPE_CHANGE
,
166 BLOCK_OP_TYPE_COMMIT_SOURCE
,
167 BLOCK_OP_TYPE_COMMIT_TARGET
,
168 BLOCK_OP_TYPE_DATAPLANE
,
169 BLOCK_OP_TYPE_DRIVE_DEL
,
171 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
172 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
,
173 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
,
174 BLOCK_OP_TYPE_MIRROR_SOURCE
,
175 BLOCK_OP_TYPE_MIRROR_TARGET
,
176 BLOCK_OP_TYPE_RESIZE
,
177 BLOCK_OP_TYPE_STREAM
,
178 BLOCK_OP_TYPE_REPLACE
,
182 void bdrv_info_print(Monitor
*mon
, const QObject
*data
);
183 void bdrv_info(Monitor
*mon
, QObject
**ret_data
);
184 void bdrv_stats_print(Monitor
*mon
, const QObject
*data
);
185 void bdrv_info_stats(Monitor
*mon
, QObject
**ret_data
);
187 /* disk I/O throttling */
188 void bdrv_io_limits_enable(BlockDriverState
*bs
, const char *group
);
189 void bdrv_io_limits_disable(BlockDriverState
*bs
);
190 void bdrv_io_limits_update_group(BlockDriverState
*bs
, const char *group
);
192 void bdrv_init(void);
193 void bdrv_init_with_whitelist(void);
194 BlockDriver
*bdrv_find_protocol(const char *filename
,
195 bool allow_protocol_prefix
,
197 BlockDriver
*bdrv_find_format(const char *format_name
);
198 int bdrv_create(BlockDriver
*drv
, const char* filename
,
199 QemuOpts
*opts
, Error
**errp
);
200 int bdrv_create_file(const char *filename
, QemuOpts
*opts
, Error
**errp
);
201 BlockDriverState
*bdrv_new_root(void);
202 BlockDriverState
*bdrv_new(void);
203 void bdrv_device_remove(BlockDriverState
*bs
);
204 void bdrv_make_anon(BlockDriverState
*bs
);
205 void bdrv_append(BlockDriverState
*bs_new
, BlockDriverState
*bs_top
);
206 void bdrv_replace_in_backing_chain(BlockDriverState
*old
,
207 BlockDriverState
*new);
209 int bdrv_parse_cache_flags(const char *mode
, int *flags
);
210 int bdrv_parse_discard_flags(const char *mode
, int *flags
);
211 BdrvChild
*bdrv_open_child(const char *filename
,
212 QDict
*options
, const char *bdref_key
,
213 BlockDriverState
* parent
,
214 const BdrvChildRole
*child_role
,
215 bool allow_none
, Error
**errp
);
216 void bdrv_set_backing_hd(BlockDriverState
*bs
, BlockDriverState
*backing_hd
);
217 int bdrv_open_backing_file(BlockDriverState
*bs
, QDict
*parent_options
,
218 const char *bdref_key
, Error
**errp
);
219 int bdrv_open(BlockDriverState
**pbs
, const char *filename
,
220 const char *reference
, QDict
*options
, int flags
, Error
**errp
);
221 BlockReopenQueue
*bdrv_reopen_queue(BlockReopenQueue
*bs_queue
,
222 BlockDriverState
*bs
,
223 QDict
*options
, int flags
);
224 int bdrv_reopen_multiple(BlockReopenQueue
*bs_queue
, Error
**errp
);
225 int bdrv_reopen(BlockDriverState
*bs
, int bdrv_flags
, Error
**errp
);
226 int bdrv_reopen_prepare(BDRVReopenState
*reopen_state
,
227 BlockReopenQueue
*queue
, Error
**errp
);
228 void bdrv_reopen_commit(BDRVReopenState
*reopen_state
);
229 void bdrv_reopen_abort(BDRVReopenState
*reopen_state
);
230 int bdrv_read(BlockDriverState
*bs
, int64_t sector_num
,
231 uint8_t *buf
, int nb_sectors
);
232 int bdrv_read_unthrottled(BlockDriverState
*bs
, int64_t sector_num
,
233 uint8_t *buf
, int nb_sectors
);
234 int bdrv_write(BlockDriverState
*bs
, int64_t sector_num
,
235 const uint8_t *buf
, int nb_sectors
);
236 int bdrv_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
237 int nb_sectors
, BdrvRequestFlags flags
);
238 BlockAIOCB
*bdrv_aio_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
239 int nb_sectors
, BdrvRequestFlags flags
,
240 BlockCompletionFunc
*cb
, void *opaque
);
241 int bdrv_make_zero(BlockDriverState
*bs
, BdrvRequestFlags flags
);
242 int bdrv_pread(BlockDriverState
*bs
, int64_t offset
,
243 void *buf
, int count
);
244 int bdrv_pwrite(BlockDriverState
*bs
, int64_t offset
,
245 const void *buf
, int count
);
246 int bdrv_pwritev(BlockDriverState
*bs
, int64_t offset
, QEMUIOVector
*qiov
);
247 int bdrv_pwrite_sync(BlockDriverState
*bs
, int64_t offset
,
248 const void *buf
, int count
);
249 int coroutine_fn
bdrv_co_readv(BlockDriverState
*bs
, int64_t sector_num
,
250 int nb_sectors
, QEMUIOVector
*qiov
);
251 int coroutine_fn
bdrv_co_copy_on_readv(BlockDriverState
*bs
,
252 int64_t sector_num
, int nb_sectors
, QEMUIOVector
*qiov
);
253 int coroutine_fn
bdrv_co_readv_no_serialising(BlockDriverState
*bs
,
254 int64_t sector_num
, int nb_sectors
, QEMUIOVector
*qiov
);
255 int coroutine_fn
bdrv_co_writev(BlockDriverState
*bs
, int64_t sector_num
,
256 int nb_sectors
, QEMUIOVector
*qiov
);
258 * Efficiently zero a region of the disk image. Note that this is a regular
259 * I/O request like read or write and should have a reasonable size. This
260 * function is not suitable for zeroing the entire image in a single request
261 * because it may allocate memory for the entire region.
263 int coroutine_fn
bdrv_co_write_zeroes(BlockDriverState
*bs
, int64_t sector_num
,
264 int nb_sectors
, BdrvRequestFlags flags
);
265 BlockDriverState
*bdrv_find_backing_image(BlockDriverState
*bs
,
266 const char *backing_file
);
267 int bdrv_get_backing_file_depth(BlockDriverState
*bs
);
268 void bdrv_refresh_filename(BlockDriverState
*bs
);
269 int bdrv_truncate(BlockDriverState
*bs
, int64_t offset
);
270 int64_t bdrv_nb_sectors(BlockDriverState
*bs
);
271 int64_t bdrv_getlength(BlockDriverState
*bs
);
272 int64_t bdrv_get_allocated_file_size(BlockDriverState
*bs
);
273 void bdrv_get_geometry(BlockDriverState
*bs
, uint64_t *nb_sectors_ptr
);
274 void bdrv_refresh_limits(BlockDriverState
*bs
, Error
**errp
);
275 int bdrv_commit(BlockDriverState
*bs
);
276 int bdrv_commit_all(void);
277 int bdrv_change_backing_file(BlockDriverState
*bs
,
278 const char *backing_file
, const char *backing_fmt
);
279 void bdrv_register(BlockDriver
*bdrv
);
280 int bdrv_drop_intermediate(BlockDriverState
*active
, BlockDriverState
*top
,
281 BlockDriverState
*base
,
282 const char *backing_file_str
);
283 BlockDriverState
*bdrv_find_overlay(BlockDriverState
*active
,
284 BlockDriverState
*bs
);
285 BlockDriverState
*bdrv_find_base(BlockDriverState
*bs
);
288 typedef struct BdrvCheckResult
{
292 int corruptions_fixed
;
294 int64_t image_end_offset
;
303 int bdrv_check(BlockDriverState
*bs
, BdrvCheckResult
*res
, BdrvCheckMode fix
);
305 /* The units of offset and total_work_size may be chosen arbitrarily by the
306 * block driver; total_work_size may change during the course of the amendment
308 typedef void BlockDriverAmendStatusCB(BlockDriverState
*bs
, int64_t offset
,
309 int64_t total_work_size
, void *opaque
);
310 int bdrv_amend_options(BlockDriverState
*bs_new
, QemuOpts
*opts
,
311 BlockDriverAmendStatusCB
*status_cb
, void *cb_opaque
);
313 /* external snapshots */
314 bool bdrv_recurse_is_first_non_filter(BlockDriverState
*bs
,
315 BlockDriverState
*candidate
);
316 bool bdrv_is_first_non_filter(BlockDriverState
*candidate
);
318 /* check if a named node can be replaced when doing drive-mirror */
319 BlockDriverState
*check_to_replace_node(BlockDriverState
*parent_bs
,
320 const char *node_name
, Error
**errp
);
322 /* async block I/O */
323 typedef void BlockDriverDirtyHandler(BlockDriverState
*bs
, int64_t sector
,
325 BlockAIOCB
*bdrv_aio_readv(BlockDriverState
*bs
, int64_t sector_num
,
326 QEMUIOVector
*iov
, int nb_sectors
,
327 BlockCompletionFunc
*cb
, void *opaque
);
328 BlockAIOCB
*bdrv_aio_writev(BlockDriverState
*bs
, int64_t sector_num
,
329 QEMUIOVector
*iov
, int nb_sectors
,
330 BlockCompletionFunc
*cb
, void *opaque
);
331 BlockAIOCB
*bdrv_aio_flush(BlockDriverState
*bs
,
332 BlockCompletionFunc
*cb
, void *opaque
);
333 BlockAIOCB
*bdrv_aio_discard(BlockDriverState
*bs
,
334 int64_t sector_num
, int nb_sectors
,
335 BlockCompletionFunc
*cb
, void *opaque
);
336 void bdrv_aio_cancel(BlockAIOCB
*acb
);
337 void bdrv_aio_cancel_async(BlockAIOCB
*acb
);
339 typedef struct BlockRequest
{
340 /* Fields to be filled by multiwrite caller */
353 BlockCompletionFunc
*cb
;
356 /* Filled by multiwrite implementation */
360 int bdrv_aio_multiwrite(BlockDriverState
*bs
, BlockRequest
*reqs
,
363 /* sg packet commands */
364 int bdrv_ioctl(BlockDriverState
*bs
, unsigned long int req
, void *buf
);
365 BlockAIOCB
*bdrv_aio_ioctl(BlockDriverState
*bs
,
366 unsigned long int req
, void *buf
,
367 BlockCompletionFunc
*cb
, void *opaque
);
369 /* Invalidate any cached metadata used by image formats */
370 void bdrv_invalidate_cache(BlockDriverState
*bs
, Error
**errp
);
371 void bdrv_invalidate_cache_all(Error
**errp
);
372 int bdrv_inactivate_all(void);
374 /* Ensure contents are flushed to disk. */
375 int bdrv_flush(BlockDriverState
*bs
);
376 int coroutine_fn
bdrv_co_flush(BlockDriverState
*bs
);
377 int bdrv_flush_all(void);
378 void bdrv_close_all(void);
379 void bdrv_drain(BlockDriverState
*bs
);
380 void bdrv_drain_all(void);
382 int bdrv_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
383 int bdrv_co_discard(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
);
384 int bdrv_has_zero_init_1(BlockDriverState
*bs
);
385 int bdrv_has_zero_init(BlockDriverState
*bs
);
386 bool bdrv_unallocated_blocks_are_zero(BlockDriverState
*bs
);
387 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState
*bs
);
388 int64_t bdrv_get_block_status(BlockDriverState
*bs
, int64_t sector_num
,
389 int nb_sectors
, int *pnum
,
390 BlockDriverState
**file
);
391 int64_t bdrv_get_block_status_above(BlockDriverState
*bs
,
392 BlockDriverState
*base
,
394 int nb_sectors
, int *pnum
,
395 BlockDriverState
**file
);
396 int bdrv_is_allocated(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
398 int bdrv_is_allocated_above(BlockDriverState
*top
, BlockDriverState
*base
,
399 int64_t sector_num
, int nb_sectors
, int *pnum
);
401 int bdrv_is_read_only(BlockDriverState
*bs
);
402 int bdrv_is_sg(BlockDriverState
*bs
);
403 int bdrv_enable_write_cache(BlockDriverState
*bs
);
404 void bdrv_set_enable_write_cache(BlockDriverState
*bs
, bool wce
);
405 bool bdrv_is_inserted(BlockDriverState
*bs
);
406 int bdrv_media_changed(BlockDriverState
*bs
);
407 void bdrv_lock_medium(BlockDriverState
*bs
, bool locked
);
408 void bdrv_eject(BlockDriverState
*bs
, bool eject_flag
);
409 const char *bdrv_get_format_name(BlockDriverState
*bs
);
410 BlockDriverState
*bdrv_find_node(const char *node_name
);
411 BlockDeviceInfoList
*bdrv_named_nodes_list(Error
**errp
);
412 BlockDriverState
*bdrv_lookup_bs(const char *device
,
413 const char *node_name
,
415 bool bdrv_chain_contains(BlockDriverState
*top
, BlockDriverState
*base
);
416 BlockDriverState
*bdrv_next_node(BlockDriverState
*bs
);
417 BlockDriverState
*bdrv_next(BlockDriverState
*bs
);
418 int bdrv_is_encrypted(BlockDriverState
*bs
);
419 int bdrv_key_required(BlockDriverState
*bs
);
420 int bdrv_set_key(BlockDriverState
*bs
, const char *key
);
421 void bdrv_add_key(BlockDriverState
*bs
, const char *key
, Error
**errp
);
422 int bdrv_query_missing_keys(void);
423 void bdrv_iterate_format(void (*it
)(void *opaque
, const char *name
),
425 const char *bdrv_get_node_name(const BlockDriverState
*bs
);
426 const char *bdrv_get_device_name(const BlockDriverState
*bs
);
427 const char *bdrv_get_device_or_node_name(const BlockDriverState
*bs
);
428 int bdrv_get_flags(BlockDriverState
*bs
);
429 int bdrv_write_compressed(BlockDriverState
*bs
, int64_t sector_num
,
430 const uint8_t *buf
, int nb_sectors
);
431 int bdrv_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
);
432 ImageInfoSpecific
*bdrv_get_specific_info(BlockDriverState
*bs
);
433 void bdrv_round_to_clusters(BlockDriverState
*bs
,
434 int64_t sector_num
, int nb_sectors
,
435 int64_t *cluster_sector_num
,
436 int *cluster_nb_sectors
);
438 const char *bdrv_get_encrypted_filename(BlockDriverState
*bs
);
439 void bdrv_get_backing_filename(BlockDriverState
*bs
,
440 char *filename
, int filename_size
);
441 void bdrv_get_full_backing_filename(BlockDriverState
*bs
,
442 char *dest
, size_t sz
, Error
**errp
);
443 void bdrv_get_full_backing_filename_from_filename(const char *backed
,
445 char *dest
, size_t sz
,
447 int bdrv_is_snapshot(BlockDriverState
*bs
);
449 int path_has_protocol(const char *path
);
450 int path_is_absolute(const char *path
);
451 void path_combine(char *dest
, int dest_size
,
452 const char *base_path
,
453 const char *filename
);
455 int bdrv_writev_vmstate(BlockDriverState
*bs
, QEMUIOVector
*qiov
, int64_t pos
);
456 int bdrv_save_vmstate(BlockDriverState
*bs
, const uint8_t *buf
,
457 int64_t pos
, int size
);
459 int bdrv_load_vmstate(BlockDriverState
*bs
, uint8_t *buf
,
460 int64_t pos
, int size
);
462 void bdrv_img_create(const char *filename
, const char *fmt
,
463 const char *base_filename
, const char *base_fmt
,
464 char *options
, uint64_t img_size
, int flags
,
465 Error
**errp
, bool quiet
);
467 /* Returns the alignment in bytes that is required so that no bounce buffer
468 * is required throughout the stack */
469 size_t bdrv_min_mem_align(BlockDriverState
*bs
);
470 /* Returns optimal alignment in bytes for bounce buffer */
471 size_t bdrv_opt_mem_align(BlockDriverState
*bs
);
472 void *qemu_blockalign(BlockDriverState
*bs
, size_t size
);
473 void *qemu_blockalign0(BlockDriverState
*bs
, size_t size
);
474 void *qemu_try_blockalign(BlockDriverState
*bs
, size_t size
);
475 void *qemu_try_blockalign0(BlockDriverState
*bs
, size_t size
);
476 bool bdrv_qiov_is_aligned(BlockDriverState
*bs
, QEMUIOVector
*qiov
);
478 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap
;
479 BdrvDirtyBitmap
*bdrv_create_dirty_bitmap(BlockDriverState
*bs
,
480 uint32_t granularity
,
483 int bdrv_dirty_bitmap_create_successor(BlockDriverState
*bs
,
484 BdrvDirtyBitmap
*bitmap
,
486 BdrvDirtyBitmap
*bdrv_dirty_bitmap_abdicate(BlockDriverState
*bs
,
487 BdrvDirtyBitmap
*bitmap
,
489 BdrvDirtyBitmap
*bdrv_reclaim_dirty_bitmap(BlockDriverState
*bs
,
490 BdrvDirtyBitmap
*bitmap
,
492 BdrvDirtyBitmap
*bdrv_find_dirty_bitmap(BlockDriverState
*bs
,
494 void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap
*bitmap
);
495 void bdrv_release_dirty_bitmap(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
);
496 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap
*bitmap
);
497 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap
*bitmap
);
498 BlockDirtyInfoList
*bdrv_query_dirty_bitmaps(BlockDriverState
*bs
);
499 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState
*bs
);
500 uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap
*bitmap
);
501 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap
*bitmap
);
502 bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap
*bitmap
);
503 DirtyBitmapStatus
bdrv_dirty_bitmap_status(BdrvDirtyBitmap
*bitmap
);
504 int bdrv_get_dirty(BlockDriverState
*bs
, BdrvDirtyBitmap
*bitmap
, int64_t sector
);
505 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap
*bitmap
,
506 int64_t cur_sector
, int nr_sectors
);
507 void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap
*bitmap
,
508 int64_t cur_sector
, int nr_sectors
);
509 void bdrv_dirty_iter_init(BdrvDirtyBitmap
*bitmap
, struct HBitmapIter
*hbi
);
510 void bdrv_set_dirty_iter(struct HBitmapIter
*hbi
, int64_t offset
);
511 int64_t bdrv_get_dirty_count(BdrvDirtyBitmap
*bitmap
);
513 void bdrv_enable_copy_on_read(BlockDriverState
*bs
);
514 void bdrv_disable_copy_on_read(BlockDriverState
*bs
);
516 void bdrv_ref(BlockDriverState
*bs
);
517 void bdrv_unref(BlockDriverState
*bs
);
518 void bdrv_unref_child(BlockDriverState
*parent
, BdrvChild
*child
);
520 bool bdrv_op_is_blocked(BlockDriverState
*bs
, BlockOpType op
, Error
**errp
);
521 void bdrv_op_block(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
522 void bdrv_op_unblock(BlockDriverState
*bs
, BlockOpType op
, Error
*reason
);
523 void bdrv_op_block_all(BlockDriverState
*bs
, Error
*reason
);
524 void bdrv_op_unblock_all(BlockDriverState
*bs
, Error
*reason
);
525 bool bdrv_op_blocker_is_empty(BlockDriverState
*bs
);
527 #define BLKDBG_EVENT(child, evt) \
530 bdrv_debug_event(child->bs, evt); \
534 void bdrv_debug_event(BlockDriverState
*bs
, BlkdebugEvent event
);
536 int bdrv_debug_breakpoint(BlockDriverState
*bs
, const char *event
,
538 int bdrv_debug_remove_breakpoint(BlockDriverState
*bs
, const char *tag
);
539 int bdrv_debug_resume(BlockDriverState
*bs
, const char *tag
);
540 bool bdrv_debug_is_suspended(BlockDriverState
*bs
, const char *tag
);
543 * bdrv_get_aio_context:
545 * Returns: the currently bound #AioContext
547 AioContext
*bdrv_get_aio_context(BlockDriverState
*bs
);
550 * bdrv_set_aio_context:
552 * Changes the #AioContext used for fd handlers, timers, and BHs by this
553 * BlockDriverState and all its children.
555 * This function must be called with iothread lock held.
557 void bdrv_set_aio_context(BlockDriverState
*bs
, AioContext
*new_context
);
558 int bdrv_probe_blocksizes(BlockDriverState
*bs
, BlockSizes
*bsz
);
559 int bdrv_probe_geometry(BlockDriverState
*bs
, HDGeometry
*geo
);
561 void bdrv_io_plug(BlockDriverState
*bs
);
562 void bdrv_io_unplug(BlockDriverState
*bs
);
563 void bdrv_flush_io_queue(BlockDriverState
*bs
);
566 * bdrv_drained_begin:
568 * Begin a quiesced section for exclusive access to the BDS, by disabling
569 * external request sources including NBD server and device model. Note that
570 * this doesn't block timers or coroutines from submitting more requests, which
571 * means block_job_pause is still necessary.
573 * This function can be recursive.
575 void bdrv_drained_begin(BlockDriverState
*bs
);
580 * End a quiescent section started by bdrv_drained_begin().
582 void bdrv_drained_end(BlockDriverState
*bs
);