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block: Fix bdrv_is_first_non_filter()
[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
106 #define BDRV_O_CACHE_MASK  (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
107
108 #define BDRV_SECTOR_BITS   9
109 #define BDRV_SECTOR_SIZE   (1ULL << BDRV_SECTOR_BITS)
110 #define BDRV_SECTOR_MASK   ~(BDRV_SECTOR_SIZE - 1)
111
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.
118  *
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.
121  *
122  * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
123  *
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
135  */
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
141
142 typedef enum {
143     BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
144 } BlockErrorAction;
145
146 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
147
148 typedef struct BDRVReopenState {
149     BlockDriverState *bs;
150     int flags;
151     void *opaque;
152 } BDRVReopenState;
153
154
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);
164
165 /* disk I/O throttling */
166 void bdrv_io_limits_enable(BlockDriverState *bs);
167 void bdrv_io_limits_disable(BlockDriverState *bs);
168
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,
175                                           bool readonly);
176 int bdrv_create(BlockDriver *drv, const char* filename,
177     QEMUOptionParameter *options, Error **errp);
178 int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
179                      Error **errp);
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                    const char *reference, QDict *options, int flags,
188                    Error **errp);
189 int bdrv_open_image(BlockDriverState **pbs, const char *filename,
190                     QDict *options, const char *bdref_key, int flags,
191                     bool force_raw, bool allow_none, Error **errp);
192 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp);
193 int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
194               int flags, BlockDriver *drv, Error **errp);
195 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
196                                     BlockDriverState *bs, int flags);
197 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);
198 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);
199 int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
200                         BlockReopenQueue *queue, Error **errp);
201 void bdrv_reopen_commit(BDRVReopenState *reopen_state);
202 void bdrv_reopen_abort(BDRVReopenState *reopen_state);
203 void bdrv_close(BlockDriverState *bs);
204 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify);
205 int bdrv_attach_dev(BlockDriverState *bs, void *dev);
206 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev);
207 void bdrv_detach_dev(BlockDriverState *bs, void *dev);
208 void *bdrv_get_attached_dev(BlockDriverState *bs);
209 void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops,
210                       void *opaque);
211 void bdrv_dev_eject_request(BlockDriverState *bs, bool force);
212 bool bdrv_dev_has_removable_media(BlockDriverState *bs);
213 bool bdrv_dev_is_tray_open(BlockDriverState *bs);
214 bool bdrv_dev_is_medium_locked(BlockDriverState *bs);
215 int bdrv_read(BlockDriverState *bs, int64_t sector_num,
216               uint8_t *buf, int nb_sectors);
217 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num,
218                           uint8_t *buf, int nb_sectors);
219 int bdrv_write(BlockDriverState *bs, int64_t sector_num,
220                const uint8_t *buf, int nb_sectors);
221 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num,
222                int nb_sectors, BdrvRequestFlags flags);
223 BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num,
224                                         int nb_sectors, BdrvRequestFlags flags,
225                                         BlockDriverCompletionFunc *cb, void *opaque);
226 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags);
227 int bdrv_pread(BlockDriverState *bs, int64_t offset,
228                void *buf, int count);
229 int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
230                 const void *buf, int count);
231 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov);
232 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
233     const void *buf, int count);
234 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
235     int nb_sectors, QEMUIOVector *qiov);
236 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
237     int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
238 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
239     int nb_sectors, QEMUIOVector *qiov);
240 /*
241  * Efficiently zero a region of the disk image.  Note that this is a regular
242  * I/O request like read or write and should have a reasonable size.  This
243  * function is not suitable for zeroing the entire image in a single request
244  * because it may allocate memory for the entire region.
245  */
246 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
247     int nb_sectors, BdrvRequestFlags flags);
248 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
249     const char *backing_file);
250 int bdrv_get_backing_file_depth(BlockDriverState *bs);
251 int bdrv_truncate(BlockDriverState *bs, int64_t offset);
252 int64_t bdrv_getlength(BlockDriverState *bs);
253 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
254 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
255 int bdrv_refresh_limits(BlockDriverState *bs);
256 int bdrv_commit(BlockDriverState *bs);
257 int bdrv_commit_all(void);
258 int bdrv_change_backing_file(BlockDriverState *bs,
259     const char *backing_file, const char *backing_fmt);
260 void bdrv_register(BlockDriver *bdrv);
261 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
262                            BlockDriverState *base);
263 BlockDriverState *bdrv_find_overlay(BlockDriverState *active,
264                                     BlockDriverState *bs);
265 BlockDriverState *bdrv_find_base(BlockDriverState *bs);
266
267
268 typedef struct BdrvCheckResult {
269     int corruptions;
270     int leaks;
271     int check_errors;
272     int corruptions_fixed;
273     int leaks_fixed;
274     int64_t image_end_offset;
275     BlockFragInfo bfi;
276 } BdrvCheckResult;
277
278 typedef enum {
279     BDRV_FIX_LEAKS    = 1,
280     BDRV_FIX_ERRORS   = 2,
281 } BdrvCheckMode;
282
283 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
284
285 int bdrv_amend_options(BlockDriverState *bs_new, QEMUOptionParameter *options);
286
287 /* external snapshots */
288
289 typedef enum {
290     BS_IS_A_FILTER,
291     BS_FILTER_PASS_DOWN,
292     BS_AUTHORIZATION_COUNT,
293 } BsAuthorization;
294
295 bool bdrv_generic_is_first_non_filter(BlockDriverState *bs,
296                                       BlockDriverState *candidate);
297 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
298                                       BlockDriverState *candidate);
299 bool bdrv_is_first_non_filter(BlockDriverState *candidate);
300
301 /* async block I/O */
302 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
303                                      int sector_num);
304 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
305                                  QEMUIOVector *iov, int nb_sectors,
306                                  BlockDriverCompletionFunc *cb, void *opaque);
307 BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
308                                   QEMUIOVector *iov, int nb_sectors,
309                                   BlockDriverCompletionFunc *cb, void *opaque);
310 BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
311                                  BlockDriverCompletionFunc *cb, void *opaque);
312 BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs,
313                                    int64_t sector_num, int nb_sectors,
314                                    BlockDriverCompletionFunc *cb, void *opaque);
315 void bdrv_aio_cancel(BlockDriverAIOCB *acb);
316
317 typedef struct BlockRequest {
318     /* Fields to be filled by multiwrite caller */
319     int64_t sector;
320     int nb_sectors;
321     int flags;
322     QEMUIOVector *qiov;
323     BlockDriverCompletionFunc *cb;
324     void *opaque;
325
326     /* Filled by multiwrite implementation */
327     int error;
328 } BlockRequest;
329
330 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
331     int num_reqs);
332
333 /* sg packet commands */
334 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
335 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
336         unsigned long int req, void *buf,
337         BlockDriverCompletionFunc *cb, void *opaque);
338
339 /* Invalidate any cached metadata used by image formats */
340 void bdrv_invalidate_cache(BlockDriverState *bs);
341 void bdrv_invalidate_cache_all(void);
342
343 void bdrv_clear_incoming_migration_all(void);
344
345 /* Ensure contents are flushed to disk.  */
346 int bdrv_flush(BlockDriverState *bs);
347 int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
348 int bdrv_flush_all(void);
349 void bdrv_close_all(void);
350 void bdrv_drain_all(void);
351
352 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
353 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
354 int bdrv_has_zero_init_1(BlockDriverState *bs);
355 int bdrv_has_zero_init(BlockDriverState *bs);
356 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs);
357 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs);
358 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
359                               int nb_sectors, int *pnum);
360 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
361                       int *pnum);
362 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
363                             int64_t sector_num, int nb_sectors, int *pnum);
364
365 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
366                        BlockdevOnError on_write_error);
367 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read);
368 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error);
369 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,
370                        bool is_read, int error);
371 int bdrv_is_read_only(BlockDriverState *bs);
372 int bdrv_is_sg(BlockDriverState *bs);
373 int bdrv_enable_write_cache(BlockDriverState *bs);
374 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
375 int bdrv_is_inserted(BlockDriverState *bs);
376 int bdrv_media_changed(BlockDriverState *bs);
377 void bdrv_lock_medium(BlockDriverState *bs, bool locked);
378 void bdrv_eject(BlockDriverState *bs, bool eject_flag);
379 const char *bdrv_get_format_name(BlockDriverState *bs);
380 BlockDriverState *bdrv_find(const char *name);
381 BlockDriverState *bdrv_find_node(const char *node_name);
382 BlockDeviceInfoList *bdrv_named_nodes_list(void);
383 BlockDriverState *bdrv_lookup_bs(const char *device,
384                                  const char *node_name,
385                                  Error **errp);
386 BlockDriverState *bdrv_next(BlockDriverState *bs);
387 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
388                   void *opaque);
389 int bdrv_is_encrypted(BlockDriverState *bs);
390 int bdrv_key_required(BlockDriverState *bs);
391 int bdrv_set_key(BlockDriverState *bs, const char *key);
392 int bdrv_query_missing_keys(void);
393 void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
394                          void *opaque);
395 const char *bdrv_get_device_name(BlockDriverState *bs);
396 int bdrv_get_flags(BlockDriverState *bs);
397 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
398                           const uint8_t *buf, int nb_sectors);
399 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
400 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
401 void bdrv_round_to_clusters(BlockDriverState *bs,
402                             int64_t sector_num, int nb_sectors,
403                             int64_t *cluster_sector_num,
404                             int *cluster_nb_sectors);
405
406 const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
407 void bdrv_get_backing_filename(BlockDriverState *bs,
408                                char *filename, int filename_size);
409 void bdrv_get_full_backing_filename(BlockDriverState *bs,
410                                     char *dest, size_t sz);
411 int bdrv_is_snapshot(BlockDriverState *bs);
412
413 int path_is_absolute(const char *path);
414 void path_combine(char *dest, int dest_size,
415                   const char *base_path,
416                   const char *filename);
417
418 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
419 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
420                       int64_t pos, int size);
421
422 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
423                       int64_t pos, int size);
424
425 void bdrv_img_create(const char *filename, const char *fmt,
426                      const char *base_filename, const char *base_fmt,
427                      char *options, uint64_t img_size, int flags,
428                      Error **errp, bool quiet);
429
430 /* Returns the alignment in bytes that is required so that no bounce buffer
431  * is required throughout the stack */
432 size_t bdrv_opt_mem_align(BlockDriverState *bs);
433 void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
434 void *qemu_blockalign(BlockDriverState *bs, size_t size);
435 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
436
437 struct HBitmapIter;
438 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap;
439 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity);
440 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
441 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
442 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector);
443 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
444 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
445 void bdrv_dirty_iter_init(BlockDriverState *bs,
446                           BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi);
447 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
448
449 void bdrv_enable_copy_on_read(BlockDriverState *bs);
450 void bdrv_disable_copy_on_read(BlockDriverState *bs);
451
452 void bdrv_ref(BlockDriverState *bs);
453 void bdrv_unref(BlockDriverState *bs);
454 void bdrv_set_in_use(BlockDriverState *bs, int in_use);
455 int bdrv_in_use(BlockDriverState *bs);
456
457 #ifdef CONFIG_LINUX_AIO
458 int raw_get_aio_fd(BlockDriverState *bs);
459 #else
460 static inline int raw_get_aio_fd(BlockDriverState *bs)
461 {
462     return -ENOTSUP;
463 }
464 #endif
465
466 enum BlockAcctType {
467     BDRV_ACCT_READ,
468     BDRV_ACCT_WRITE,
469     BDRV_ACCT_FLUSH,
470     BDRV_MAX_IOTYPE,
471 };
472
473 typedef struct BlockAcctCookie {
474     int64_t bytes;
475     int64_t start_time_ns;
476     enum BlockAcctType type;
477 } BlockAcctCookie;
478
479 void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,
480         int64_t bytes, enum BlockAcctType type);
481 void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie);
482
483 typedef enum {
484     BLKDBG_L1_UPDATE,
485
486     BLKDBG_L1_GROW_ALLOC_TABLE,
487     BLKDBG_L1_GROW_WRITE_TABLE,
488     BLKDBG_L1_GROW_ACTIVATE_TABLE,
489
490     BLKDBG_L2_LOAD,
491     BLKDBG_L2_UPDATE,
492     BLKDBG_L2_UPDATE_COMPRESSED,
493     BLKDBG_L2_ALLOC_COW_READ,
494     BLKDBG_L2_ALLOC_WRITE,
495
496     BLKDBG_READ_AIO,
497     BLKDBG_READ_BACKING_AIO,
498     BLKDBG_READ_COMPRESSED,
499
500     BLKDBG_WRITE_AIO,
501     BLKDBG_WRITE_COMPRESSED,
502
503     BLKDBG_VMSTATE_LOAD,
504     BLKDBG_VMSTATE_SAVE,
505
506     BLKDBG_COW_READ,
507     BLKDBG_COW_WRITE,
508
509     BLKDBG_REFTABLE_LOAD,
510     BLKDBG_REFTABLE_GROW,
511     BLKDBG_REFTABLE_UPDATE,
512
513     BLKDBG_REFBLOCK_LOAD,
514     BLKDBG_REFBLOCK_UPDATE,
515     BLKDBG_REFBLOCK_UPDATE_PART,
516     BLKDBG_REFBLOCK_ALLOC,
517     BLKDBG_REFBLOCK_ALLOC_HOOKUP,
518     BLKDBG_REFBLOCK_ALLOC_WRITE,
519     BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
520     BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
521     BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
522
523     BLKDBG_CLUSTER_ALLOC,
524     BLKDBG_CLUSTER_ALLOC_BYTES,
525     BLKDBG_CLUSTER_FREE,
526
527     BLKDBG_FLUSH_TO_OS,
528     BLKDBG_FLUSH_TO_DISK,
529
530     BLKDBG_PWRITEV_RMW_HEAD,
531     BLKDBG_PWRITEV_RMW_AFTER_HEAD,
532     BLKDBG_PWRITEV_RMW_TAIL,
533     BLKDBG_PWRITEV_RMW_AFTER_TAIL,
534     BLKDBG_PWRITEV,
535     BLKDBG_PWRITEV_ZERO,
536     BLKDBG_PWRITEV_DONE,
537
538     BLKDBG_EVENT_MAX,
539 } BlkDebugEvent;
540
541 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
542 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
543
544 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
545                            const char *tag);
546 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag);
547 int bdrv_debug_resume(BlockDriverState *bs, const char *tag);
548 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag);
549
550 #endif
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