block: Add error handling to bdrv_invalidate_cache()
[qemu.git] / include / block / block.h
1 #ifndef BLOCK_H
2 #define BLOCK_H
3
4 #include "block/aio.h"
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"
10
11 /* block.c */
12 typedef struct BlockDriver BlockDriver;
13 typedef struct BlockJob BlockJob;
14
15 typedef struct BlockDriverInfo {
16 /* in bytes, 0 if irrelevant */
17 int cluster_size;
18 /* offset at which the VM state can be saved (0 if not possible) */
19 int64_t vm_state_offset;
20 bool is_dirty;
21 /*
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.
24 */
25 bool unallocated_blocks_are_zero;
26 /*
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.
35 */
36 bool can_write_zeroes_with_unmap;
37 } BlockDriverInfo;
38
39 typedef struct BlockFragInfo {
40 uint64_t allocated_clusters;
41 uint64_t total_clusters;
42 uint64_t fragmented_clusters;
43 uint64_t compressed_clusters;
44 } BlockFragInfo;
45
46 /* Callbacks for block device models */
47 typedef struct BlockDevOps {
48 /*
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.
54 */
55 void (*change_media_cb)(void *opaque, bool load);
56 /*
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.
63 */
64 void (*eject_request_cb)(void *opaque, bool force);
65 /*
66 * Is the virtual tray open?
67 * Device models implement this only when the device has a tray.
68 */
69 bool (*is_tray_open)(void *opaque);
70 /*
71 * Is the virtual medium locked into the device?
72 * Device models implement this only when device has such a lock.
73 */
74 bool (*is_medium_locked)(void *opaque);
75 /*
76 * Runs when the size changed (e.g. monitor command block_resize)
77 */
78 void (*resize_cb)(void *opaque);
79 } BlockDevOps;
80
81 typedef enum {
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.
89 */
90 BDRV_REQ_MAY_UNMAP = 0x4,
91 } BdrvRequestFlags;
92
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 */
105 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
106 select an appropriate protocol driver,
107 ignoring the format layer */
108
109 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
110
111 #define BDRV_SECTOR_BITS 9
112 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
113 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
114
115 /* BDRV_BLOCK_DATA: data is read from bs->file or another file
116 * BDRV_BLOCK_ZERO: sectors read as zero
117 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
118 * BDRV_BLOCK_RAW: used internally to indicate that the request
119 * was answered by the raw driver and that one
120 * should look in bs->file directly.
121 *
122 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
123 * bs->file where sector data can be read from as raw data.
124 *
125 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
126 *
127 * DATA ZERO OFFSET_VALID
128 * t t t sectors read as zero, bs->file is zero at offset
129 * t f t sectors read as valid from bs->file at offset
130 * f t t sectors preallocated, read as zero, bs->file not
131 * necessarily zero at offset
132 * f f t sectors preallocated but read from backing_hd,
133 * bs->file contains garbage at offset
134 * t t f sectors preallocated, read as zero, unknown offset
135 * t f f sectors read from unknown file or offset
136 * f t f not allocated or unknown offset, read as zero
137 * f f f not allocated or unknown offset, read from backing_hd
138 */
139 #define BDRV_BLOCK_DATA 1
140 #define BDRV_BLOCK_ZERO 2
141 #define BDRV_BLOCK_OFFSET_VALID 4
142 #define BDRV_BLOCK_RAW 8
143 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
144
145 typedef enum {
146 BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
147 } BlockErrorAction;
148
149 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
150
151 typedef struct BDRVReopenState {
152 BlockDriverState *bs;
153 int flags;
154 void *opaque;
155 } BDRVReopenState;
156
157
158 void bdrv_iostatus_enable(BlockDriverState *bs);
159 void bdrv_iostatus_reset(BlockDriverState *bs);
160 void bdrv_iostatus_disable(BlockDriverState *bs);
161 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
162 void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
163 void bdrv_info_print(Monitor *mon, const QObject *data);
164 void bdrv_info(Monitor *mon, QObject **ret_data);
165 void bdrv_stats_print(Monitor *mon, const QObject *data);
166 void bdrv_info_stats(Monitor *mon, QObject **ret_data);
167
168 /* disk I/O throttling */
169 void bdrv_io_limits_enable(BlockDriverState *bs);
170 void bdrv_io_limits_disable(BlockDriverState *bs);
171
172 void bdrv_init(void);
173 void bdrv_init_with_whitelist(void);
174 BlockDriver *bdrv_find_protocol(const char *filename,
175 bool allow_protocol_prefix);
176 BlockDriver *bdrv_find_format(const char *format_name);
177 BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
178 bool readonly);
179 int bdrv_create(BlockDriver *drv, const char* filename,
180 QEMUOptionParameter *options, Error **errp);
181 int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
182 Error **errp);
183 BlockDriverState *bdrv_new(const char *device_name);
184 void bdrv_make_anon(BlockDriverState *bs);
185 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
186 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
187 int bdrv_parse_cache_flags(const char *mode, int *flags);
188 int bdrv_parse_discard_flags(const char *mode, int *flags);
189 int bdrv_open_image(BlockDriverState **pbs, const char *filename,
190 QDict *options, const char *bdref_key, int flags,
191 bool allow_none, Error **errp);
192 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp);
193 int bdrv_open(BlockDriverState **pbs, const char *filename,
194 const char *reference, QDict *options, int flags,
195 BlockDriver *drv, Error **errp);
196 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
197 BlockDriverState *bs, int flags);
198 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);
199 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);
200 int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
201 BlockReopenQueue *queue, Error **errp);
202 void bdrv_reopen_commit(BDRVReopenState *reopen_state);
203 void bdrv_reopen_abort(BDRVReopenState *reopen_state);
204 void bdrv_close(BlockDriverState *bs);
205 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify);
206 int bdrv_attach_dev(BlockDriverState *bs, void *dev);
207 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev);
208 void bdrv_detach_dev(BlockDriverState *bs, void *dev);
209 void *bdrv_get_attached_dev(BlockDriverState *bs);
210 void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops,
211 void *opaque);
212 void bdrv_dev_eject_request(BlockDriverState *bs, bool force);
213 bool bdrv_dev_has_removable_media(BlockDriverState *bs);
214 bool bdrv_dev_is_tray_open(BlockDriverState *bs);
215 bool bdrv_dev_is_medium_locked(BlockDriverState *bs);
216 int bdrv_read(BlockDriverState *bs, int64_t sector_num,
217 uint8_t *buf, int nb_sectors);
218 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num,
219 uint8_t *buf, int nb_sectors);
220 int bdrv_write(BlockDriverState *bs, int64_t sector_num,
221 const uint8_t *buf, int nb_sectors);
222 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num,
223 int nb_sectors, BdrvRequestFlags flags);
224 BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num,
225 int nb_sectors, BdrvRequestFlags flags,
226 BlockDriverCompletionFunc *cb, void *opaque);
227 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags);
228 int bdrv_pread(BlockDriverState *bs, int64_t offset,
229 void *buf, int count);
230 int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
231 const void *buf, int count);
232 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov);
233 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
234 const void *buf, int count);
235 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
236 int nb_sectors, QEMUIOVector *qiov);
237 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
238 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
239 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
240 int nb_sectors, QEMUIOVector *qiov);
241 /*
242 * Efficiently zero a region of the disk image. Note that this is a regular
243 * I/O request like read or write and should have a reasonable size. This
244 * function is not suitable for zeroing the entire image in a single request
245 * because it may allocate memory for the entire region.
246 */
247 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
248 int nb_sectors, BdrvRequestFlags flags);
249 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
250 const char *backing_file);
251 int bdrv_get_backing_file_depth(BlockDriverState *bs);
252 int bdrv_truncate(BlockDriverState *bs, int64_t offset);
253 int64_t bdrv_getlength(BlockDriverState *bs);
254 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
255 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
256 int bdrv_refresh_limits(BlockDriverState *bs);
257 int bdrv_commit(BlockDriverState *bs);
258 int bdrv_commit_all(void);
259 int bdrv_change_backing_file(BlockDriverState *bs,
260 const char *backing_file, const char *backing_fmt);
261 void bdrv_register(BlockDriver *bdrv);
262 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
263 BlockDriverState *base);
264 BlockDriverState *bdrv_find_overlay(BlockDriverState *active,
265 BlockDriverState *bs);
266 BlockDriverState *bdrv_find_base(BlockDriverState *bs);
267
268
269 typedef struct BdrvCheckResult {
270 int corruptions;
271 int leaks;
272 int check_errors;
273 int corruptions_fixed;
274 int leaks_fixed;
275 int64_t image_end_offset;
276 BlockFragInfo bfi;
277 } BdrvCheckResult;
278
279 typedef enum {
280 BDRV_FIX_LEAKS = 1,
281 BDRV_FIX_ERRORS = 2,
282 } BdrvCheckMode;
283
284 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
285
286 int bdrv_amend_options(BlockDriverState *bs_new, QEMUOptionParameter *options);
287
288 /* external snapshots */
289 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
290 BlockDriverState *candidate);
291 bool bdrv_is_first_non_filter(BlockDriverState *candidate);
292
293 /* async block I/O */
294 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
295 int sector_num);
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);
308
309 typedef struct BlockRequest {
310 /* Fields to be filled by multiwrite caller */
311 int64_t sector;
312 int nb_sectors;
313 int flags;
314 QEMUIOVector *qiov;
315 BlockDriverCompletionFunc *cb;
316 void *opaque;
317
318 /* Filled by multiwrite implementation */
319 int error;
320 } BlockRequest;
321
322 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
323 int num_reqs);
324
325 /* sg packet commands */
326 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
327 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
328 unsigned long int req, void *buf,
329 BlockDriverCompletionFunc *cb, void *opaque);
330
331 /* Invalidate any cached metadata used by image formats */
332 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp);
333 void bdrv_invalidate_cache_all(Error **errp);
334
335 void bdrv_clear_incoming_migration_all(void);
336
337 /* Ensure contents are flushed to disk. */
338 int bdrv_flush(BlockDriverState *bs);
339 int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
340 int bdrv_flush_all(void);
341 void bdrv_close_all(void);
342 void bdrv_drain_all(void);
343
344 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
345 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
346 int bdrv_has_zero_init_1(BlockDriverState *bs);
347 int bdrv_has_zero_init(BlockDriverState *bs);
348 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs);
349 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs);
350 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
351 int nb_sectors, int *pnum);
352 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
353 int *pnum);
354 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
355 int64_t sector_num, int nb_sectors, int *pnum);
356
357 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
358 BlockdevOnError on_write_error);
359 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read);
360 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error);
361 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,
362 bool is_read, int error);
363 int bdrv_is_read_only(BlockDriverState *bs);
364 int bdrv_is_sg(BlockDriverState *bs);
365 int bdrv_enable_write_cache(BlockDriverState *bs);
366 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
367 int bdrv_is_inserted(BlockDriverState *bs);
368 int bdrv_media_changed(BlockDriverState *bs);
369 void bdrv_lock_medium(BlockDriverState *bs, bool locked);
370 void bdrv_eject(BlockDriverState *bs, bool eject_flag);
371 const char *bdrv_get_format_name(BlockDriverState *bs);
372 BlockDriverState *bdrv_find(const char *name);
373 BlockDriverState *bdrv_find_node(const char *node_name);
374 BlockDeviceInfoList *bdrv_named_nodes_list(void);
375 BlockDriverState *bdrv_lookup_bs(const char *device,
376 const char *node_name,
377 Error **errp);
378 BlockDriverState *bdrv_next(BlockDriverState *bs);
379 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
380 void *opaque);
381 int bdrv_is_encrypted(BlockDriverState *bs);
382 int bdrv_key_required(BlockDriverState *bs);
383 int bdrv_set_key(BlockDriverState *bs, const char *key);
384 int bdrv_query_missing_keys(void);
385 void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
386 void *opaque);
387 const char *bdrv_get_device_name(BlockDriverState *bs);
388 int bdrv_get_flags(BlockDriverState *bs);
389 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
390 const uint8_t *buf, int nb_sectors);
391 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
392 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
393 void bdrv_round_to_clusters(BlockDriverState *bs,
394 int64_t sector_num, int nb_sectors,
395 int64_t *cluster_sector_num,
396 int *cluster_nb_sectors);
397
398 const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
399 void bdrv_get_backing_filename(BlockDriverState *bs,
400 char *filename, int filename_size);
401 void bdrv_get_full_backing_filename(BlockDriverState *bs,
402 char *dest, size_t sz);
403 int bdrv_is_snapshot(BlockDriverState *bs);
404
405 int path_is_absolute(const char *path);
406 void path_combine(char *dest, int dest_size,
407 const char *base_path,
408 const char *filename);
409
410 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
411 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
412 int64_t pos, int size);
413
414 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
415 int64_t pos, int size);
416
417 void bdrv_img_create(const char *filename, const char *fmt,
418 const char *base_filename, const char *base_fmt,
419 char *options, uint64_t img_size, int flags,
420 Error **errp, bool quiet);
421
422 /* Returns the alignment in bytes that is required so that no bounce buffer
423 * is required throughout the stack */
424 size_t bdrv_opt_mem_align(BlockDriverState *bs);
425 void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
426 void *qemu_blockalign(BlockDriverState *bs, size_t size);
427 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
428
429 struct HBitmapIter;
430 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap;
431 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity);
432 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
433 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
434 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector);
435 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
436 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
437 void bdrv_dirty_iter_init(BlockDriverState *bs,
438 BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi);
439 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
440
441 void bdrv_enable_copy_on_read(BlockDriverState *bs);
442 void bdrv_disable_copy_on_read(BlockDriverState *bs);
443
444 void bdrv_ref(BlockDriverState *bs);
445 void bdrv_unref(BlockDriverState *bs);
446 void bdrv_set_in_use(BlockDriverState *bs, int in_use);
447 int bdrv_in_use(BlockDriverState *bs);
448
449 #ifdef CONFIG_LINUX_AIO
450 int raw_get_aio_fd(BlockDriverState *bs);
451 #else
452 static inline int raw_get_aio_fd(BlockDriverState *bs)
453 {
454 return -ENOTSUP;
455 }
456 #endif
457
458 enum BlockAcctType {
459 BDRV_ACCT_READ,
460 BDRV_ACCT_WRITE,
461 BDRV_ACCT_FLUSH,
462 BDRV_MAX_IOTYPE,
463 };
464
465 typedef struct BlockAcctCookie {
466 int64_t bytes;
467 int64_t start_time_ns;
468 enum BlockAcctType type;
469 } BlockAcctCookie;
470
471 void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,
472 int64_t bytes, enum BlockAcctType type);
473 void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie);
474
475 typedef enum {
476 BLKDBG_L1_UPDATE,
477
478 BLKDBG_L1_GROW_ALLOC_TABLE,
479 BLKDBG_L1_GROW_WRITE_TABLE,
480 BLKDBG_L1_GROW_ACTIVATE_TABLE,
481
482 BLKDBG_L2_LOAD,
483 BLKDBG_L2_UPDATE,
484 BLKDBG_L2_UPDATE_COMPRESSED,
485 BLKDBG_L2_ALLOC_COW_READ,
486 BLKDBG_L2_ALLOC_WRITE,
487
488 BLKDBG_READ_AIO,
489 BLKDBG_READ_BACKING_AIO,
490 BLKDBG_READ_COMPRESSED,
491
492 BLKDBG_WRITE_AIO,
493 BLKDBG_WRITE_COMPRESSED,
494
495 BLKDBG_VMSTATE_LOAD,
496 BLKDBG_VMSTATE_SAVE,
497
498 BLKDBG_COW_READ,
499 BLKDBG_COW_WRITE,
500
501 BLKDBG_REFTABLE_LOAD,
502 BLKDBG_REFTABLE_GROW,
503 BLKDBG_REFTABLE_UPDATE,
504
505 BLKDBG_REFBLOCK_LOAD,
506 BLKDBG_REFBLOCK_UPDATE,
507 BLKDBG_REFBLOCK_UPDATE_PART,
508 BLKDBG_REFBLOCK_ALLOC,
509 BLKDBG_REFBLOCK_ALLOC_HOOKUP,
510 BLKDBG_REFBLOCK_ALLOC_WRITE,
511 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
512 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
513 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
514
515 BLKDBG_CLUSTER_ALLOC,
516 BLKDBG_CLUSTER_ALLOC_BYTES,
517 BLKDBG_CLUSTER_FREE,
518
519 BLKDBG_FLUSH_TO_OS,
520 BLKDBG_FLUSH_TO_DISK,
521
522 BLKDBG_PWRITEV_RMW_HEAD,
523 BLKDBG_PWRITEV_RMW_AFTER_HEAD,
524 BLKDBG_PWRITEV_RMW_TAIL,
525 BLKDBG_PWRITEV_RMW_AFTER_TAIL,
526 BLKDBG_PWRITEV,
527 BLKDBG_PWRITEV_ZERO,
528 BLKDBG_PWRITEV_DONE,
529
530 BLKDBG_EVENT_MAX,
531 } BlkDebugEvent;
532
533 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
534 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
535
536 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
537 const char *tag);
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);
541
542 #endif