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 } BlockDriverInfo; 22 23 typedef struct BlockFragInfo { 24 uint64_t allocated_clusters; 25 uint64_t total_clusters; 26 uint64_t fragmented_clusters; 27 uint64_t compressed_clusters; 28 } BlockFragInfo; 29 30 /* Callbacks for block device models */ 31 typedef struct BlockDevOps { 32 /* 33 * Runs when virtual media changed (monitor commands eject, change) 34 * Argument load is true on load and false on eject. 35 * Beware: doesn't run when a host device's physical media 36 * changes. Sure would be useful if it did. 37 * Device models with removable media must implement this callback. 38 */ 39 void (*change_media_cb)(void *opaque, bool load); 40 /* 41 * Runs when an eject request is issued from the monitor, the tray 42 * is closed, and the medium is locked. 43 * Device models that do not implement is_medium_locked will not need 44 * this callback. Device models that can lock the medium or tray might 45 * want to implement the callback and unlock the tray when "force" is 46 * true, even if they do not support eject requests. 47 */ 48 void (*eject_request_cb)(void *opaque, bool force); 49 /* 50 * Is the virtual tray open? 51 * Device models implement this only when the device has a tray. 52 */ 53 bool (*is_tray_open)(void *opaque); 54 /* 55 * Is the virtual medium locked into the device? 56 * Device models implement this only when device has such a lock. 57 */ 58 bool (*is_medium_locked)(void *opaque); 59 /* 60 * Runs when the size changed (e.g. monitor command block_resize) 61 */ 62 void (*resize_cb)(void *opaque); 63 } BlockDevOps; 64 65 #define BDRV_O_RDWR 0x0002 66 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 67 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 68 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 69 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 70 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 71 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 72 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 73 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 74 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 75 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 76 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 77 78 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 79 80 #define BDRV_SECTOR_BITS 9 81 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 82 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 83 84 /* BDRV_BLOCK_DATA: data is read from bs->file or another file 85 * BDRV_BLOCK_ZERO: sectors read as zero 86 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 87 * BDRV_BLOCK_RAW: used internally to indicate that the request 88 * was answered by the raw driver and that one 89 * should look in bs->file directly. 90 * 91 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 92 * bs->file where sector data can be read from as raw data. 93 * 94 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 95 * 96 * DATA ZERO OFFSET_VALID 97 * t t t sectors read as zero, bs->file is zero at offset 98 * t f t sectors read as valid from bs->file at offset 99 * f t t sectors preallocated, read as zero, bs->file not 100 * necessarily zero at offset 101 * f f t sectors preallocated but read from backing_hd, 102 * bs->file contains garbage at offset 103 * t t f sectors preallocated, read as zero, unknown offset 104 * t f f sectors read from unknown file or offset 105 * f t f not allocated or unknown offset, read as zero 106 * f f f not allocated or unknown offset, read from backing_hd 107 */ 108 #define BDRV_BLOCK_DATA 1 109 #define BDRV_BLOCK_ZERO 2 110 #define BDRV_BLOCK_OFFSET_VALID 4 111 #define BDRV_BLOCK_RAW 8 112 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 113 114 typedef enum { 115 BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP 116 } BlockErrorAction; 117 118 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 119 120 typedef struct BDRVReopenState { 121 BlockDriverState *bs; 122 int flags; 123 void *opaque; 124 } BDRVReopenState; 125 126 127 void bdrv_iostatus_enable(BlockDriverState *bs); 128 void bdrv_iostatus_reset(BlockDriverState *bs); 129 void bdrv_iostatus_disable(BlockDriverState *bs); 130 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 131 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 132 void bdrv_info_print(Monitor *mon, const QObject *data); 133 void bdrv_info(Monitor *mon, QObject **ret_data); 134 void bdrv_stats_print(Monitor *mon, const QObject *data); 135 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 136 137 /* disk I/O throttling */ 138 void bdrv_io_limits_enable(BlockDriverState *bs); 139 void bdrv_io_limits_disable(BlockDriverState *bs); 140 141 void bdrv_init(void); 142 void bdrv_init_with_whitelist(void); 143 BlockDriver *bdrv_find_protocol(const char *filename, 144 bool allow_protocol_prefix); 145 BlockDriver *bdrv_find_format(const char *format_name); 146 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 147 bool readonly); 148 int bdrv_create(BlockDriver *drv, const char* filename, 149 QEMUOptionParameter *options, Error **errp); 150 int bdrv_create_file(const char* filename, QEMUOptionParameter *options, 151 Error **errp); 152 BlockDriverState *bdrv_new(const char *device_name); 153 void bdrv_make_anon(BlockDriverState *bs); 154 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 155 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 156 int bdrv_parse_cache_flags(const char *mode, int *flags); 157 int bdrv_parse_discard_flags(const char *mode, int *flags); 158 int bdrv_file_open(BlockDriverState **pbs, const char *filename, 159 QDict *options, int flags, Error **errp); 160 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 161 int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options, 162 int flags, BlockDriver *drv, Error **errp); 163 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 164 BlockDriverState *bs, int flags); 165 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 166 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 167 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 168 BlockReopenQueue *queue, Error **errp); 169 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 170 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 171 void bdrv_close(BlockDriverState *bs); 172 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 173 int bdrv_attach_dev(BlockDriverState *bs, void *dev); 174 void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev); 175 void bdrv_detach_dev(BlockDriverState *bs, void *dev); 176 void *bdrv_get_attached_dev(BlockDriverState *bs); 177 void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops, 178 void *opaque); 179 void bdrv_dev_eject_request(BlockDriverState *bs, bool force); 180 bool bdrv_dev_has_removable_media(BlockDriverState *bs); 181 bool bdrv_dev_is_tray_open(BlockDriverState *bs); 182 bool bdrv_dev_is_medium_locked(BlockDriverState *bs); 183 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 184 uint8_t *buf, int nb_sectors); 185 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 186 uint8_t *buf, int nb_sectors); 187 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 188 const uint8_t *buf, int nb_sectors); 189 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 190 int nb_sectors); 191 int bdrv_writev(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov); 192 int bdrv_pread(BlockDriverState *bs, int64_t offset, 193 void *buf, int count); 194 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 195 const void *buf, int count); 196 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 197 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 198 const void *buf, int count); 199 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 200 int nb_sectors, QEMUIOVector *qiov); 201 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 202 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 203 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 204 int nb_sectors, QEMUIOVector *qiov); 205 /* 206 * Efficiently zero a region of the disk image. Note that this is a regular 207 * I/O request like read or write and should have a reasonable size. This 208 * function is not suitable for zeroing the entire image in a single request 209 * because it may allocate memory for the entire region. 210 */ 211 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 212 int nb_sectors); 213 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 214 const char *backing_file); 215 int bdrv_get_backing_file_depth(BlockDriverState *bs); 216 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 217 int64_t bdrv_getlength(BlockDriverState *bs); 218 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 219 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 220 int bdrv_commit(BlockDriverState *bs); 221 int bdrv_commit_all(void); 222 int bdrv_change_backing_file(BlockDriverState *bs, 223 const char *backing_file, const char *backing_fmt); 224 void bdrv_register(BlockDriver *bdrv); 225 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 226 BlockDriverState *base); 227 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 228 BlockDriverState *bs); 229 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 230 231 232 typedef struct BdrvCheckResult { 233 int corruptions; 234 int leaks; 235 int check_errors; 236 int corruptions_fixed; 237 int leaks_fixed; 238 int64_t image_end_offset; 239 BlockFragInfo bfi; 240 } BdrvCheckResult; 241 242 typedef enum { 243 BDRV_FIX_LEAKS = 1, 244 BDRV_FIX_ERRORS = 2, 245 } BdrvCheckMode; 246 247 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 248 249 int bdrv_amend_options(BlockDriverState *bs_new, QEMUOptionParameter *options); 250 251 /* external snapshots */ 252 253 typedef enum { 254 EXT_SNAPSHOT_ALLOWED, 255 EXT_SNAPSHOT_FORBIDDEN, 256 } ExtSnapshotPerm; 257 258 /* return EXT_SNAPSHOT_ALLOWED if external snapshot is allowed 259 * return EXT_SNAPSHOT_FORBIDDEN if external snapshot is forbidden 260 */ 261 ExtSnapshotPerm bdrv_check_ext_snapshot(BlockDriverState *bs); 262 /* helper used to forbid external snapshots like in blkverify */ 263 ExtSnapshotPerm bdrv_check_ext_snapshot_forbidden(BlockDriverState *bs); 264 265 /* async block I/O */ 266 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 267 int sector_num); 268 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 269 QEMUIOVector *iov, int nb_sectors, 270 BlockDriverCompletionFunc *cb, void *opaque); 271 BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 272 QEMUIOVector *iov, int nb_sectors, 273 BlockDriverCompletionFunc *cb, void *opaque); 274 BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, 275 BlockDriverCompletionFunc *cb, void *opaque); 276 BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, 277 int64_t sector_num, int nb_sectors, 278 BlockDriverCompletionFunc *cb, void *opaque); 279 void bdrv_aio_cancel(BlockDriverAIOCB *acb); 280 281 typedef struct BlockRequest { 282 /* Fields to be filled by multiwrite caller */ 283 int64_t sector; 284 int nb_sectors; 285 QEMUIOVector *qiov; 286 BlockDriverCompletionFunc *cb; 287 void *opaque; 288 289 /* Filled by multiwrite implementation */ 290 int error; 291 } BlockRequest; 292 293 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 294 int num_reqs); 295 296 /* sg packet commands */ 297 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 298 BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 299 unsigned long int req, void *buf, 300 BlockDriverCompletionFunc *cb, void *opaque); 301 302 /* Invalidate any cached metadata used by image formats */ 303 void bdrv_invalidate_cache(BlockDriverState *bs); 304 void bdrv_invalidate_cache_all(void); 305 306 void bdrv_clear_incoming_migration_all(void); 307 308 /* Ensure contents are flushed to disk. */ 309 int bdrv_flush(BlockDriverState *bs); 310 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 311 int bdrv_flush_all(void); 312 void bdrv_close_all(void); 313 void bdrv_drain_all(void); 314 315 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 316 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 317 int bdrv_has_zero_init_1(BlockDriverState *bs); 318 int bdrv_has_zero_init(BlockDriverState *bs); 319 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 320 int nb_sectors, int *pnum); 321 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 322 int *pnum); 323 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 324 int64_t sector_num, int nb_sectors, int *pnum); 325 326 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 327 BlockdevOnError on_write_error); 328 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 329 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 330 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 331 bool is_read, int error); 332 int bdrv_is_read_only(BlockDriverState *bs); 333 int bdrv_is_sg(BlockDriverState *bs); 334 int bdrv_enable_write_cache(BlockDriverState *bs); 335 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 336 int bdrv_is_inserted(BlockDriverState *bs); 337 int bdrv_media_changed(BlockDriverState *bs); 338 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 339 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 340 const char *bdrv_get_format_name(BlockDriverState *bs); 341 BlockDriverState *bdrv_find(const char *name); 342 BlockDriverState *bdrv_next(BlockDriverState *bs); 343 void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), 344 void *opaque); 345 int bdrv_is_encrypted(BlockDriverState *bs); 346 int bdrv_key_required(BlockDriverState *bs); 347 int bdrv_set_key(BlockDriverState *bs, const char *key); 348 int bdrv_query_missing_keys(void); 349 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 350 void *opaque); 351 const char *bdrv_get_device_name(BlockDriverState *bs); 352 int bdrv_get_flags(BlockDriverState *bs); 353 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 354 const uint8_t *buf, int nb_sectors); 355 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 356 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 357 void bdrv_round_to_clusters(BlockDriverState *bs, 358 int64_t sector_num, int nb_sectors, 359 int64_t *cluster_sector_num, 360 int *cluster_nb_sectors); 361 362 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 363 void bdrv_get_backing_filename(BlockDriverState *bs, 364 char *filename, int filename_size); 365 void bdrv_get_full_backing_filename(BlockDriverState *bs, 366 char *dest, size_t sz); 367 int bdrv_is_snapshot(BlockDriverState *bs); 368 369 int path_is_absolute(const char *path); 370 void path_combine(char *dest, int dest_size, 371 const char *base_path, 372 const char *filename); 373 374 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 375 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 376 int64_t pos, int size); 377 378 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 379 int64_t pos, int size); 380 381 void bdrv_img_create(const char *filename, const char *fmt, 382 const char *base_filename, const char *base_fmt, 383 char *options, uint64_t img_size, int flags, 384 Error **errp, bool quiet); 385 386 void bdrv_set_buffer_alignment(BlockDriverState *bs, int align); 387 void *qemu_blockalign(BlockDriverState *bs, size_t size); 388 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 389 390 struct HBitmapIter; 391 void bdrv_set_dirty_tracking(BlockDriverState *bs, int granularity); 392 int bdrv_get_dirty(BlockDriverState *bs, int64_t sector); 393 void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 394 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); 395 void bdrv_dirty_iter_init(BlockDriverState *bs, struct HBitmapIter *hbi); 396 int64_t bdrv_get_dirty_count(BlockDriverState *bs); 397 398 void bdrv_enable_copy_on_read(BlockDriverState *bs); 399 void bdrv_disable_copy_on_read(BlockDriverState *bs); 400 401 void bdrv_ref(BlockDriverState *bs); 402 void bdrv_unref(BlockDriverState *bs); 403 void bdrv_set_in_use(BlockDriverState *bs, int in_use); 404 int bdrv_in_use(BlockDriverState *bs); 405 406 #ifdef CONFIG_LINUX_AIO 407 int raw_get_aio_fd(BlockDriverState *bs); 408 #else 409 static inline int raw_get_aio_fd(BlockDriverState *bs) 410 { 411 return -ENOTSUP; 412 } 413 #endif 414 415 enum BlockAcctType { 416 BDRV_ACCT_READ, 417 BDRV_ACCT_WRITE, 418 BDRV_ACCT_FLUSH, 419 BDRV_MAX_IOTYPE, 420 }; 421 422 typedef struct BlockAcctCookie { 423 int64_t bytes; 424 int64_t start_time_ns; 425 enum BlockAcctType type; 426 } BlockAcctCookie; 427 428 void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, 429 int64_t bytes, enum BlockAcctType type); 430 void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie); 431 432 typedef enum { 433 BLKDBG_L1_UPDATE, 434 435 BLKDBG_L1_GROW_ALLOC_TABLE, 436 BLKDBG_L1_GROW_WRITE_TABLE, 437 BLKDBG_L1_GROW_ACTIVATE_TABLE, 438 439 BLKDBG_L2_LOAD, 440 BLKDBG_L2_UPDATE, 441 BLKDBG_L2_UPDATE_COMPRESSED, 442 BLKDBG_L2_ALLOC_COW_READ, 443 BLKDBG_L2_ALLOC_WRITE, 444 445 BLKDBG_READ_AIO, 446 BLKDBG_READ_BACKING_AIO, 447 BLKDBG_READ_COMPRESSED, 448 449 BLKDBG_WRITE_AIO, 450 BLKDBG_WRITE_COMPRESSED, 451 452 BLKDBG_VMSTATE_LOAD, 453 BLKDBG_VMSTATE_SAVE, 454 455 BLKDBG_COW_READ, 456 BLKDBG_COW_WRITE, 457 458 BLKDBG_REFTABLE_LOAD, 459 BLKDBG_REFTABLE_GROW, 460 BLKDBG_REFTABLE_UPDATE, 461 462 BLKDBG_REFBLOCK_LOAD, 463 BLKDBG_REFBLOCK_UPDATE, 464 BLKDBG_REFBLOCK_UPDATE_PART, 465 BLKDBG_REFBLOCK_ALLOC, 466 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 467 BLKDBG_REFBLOCK_ALLOC_WRITE, 468 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 469 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 470 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 471 472 BLKDBG_CLUSTER_ALLOC, 473 BLKDBG_CLUSTER_ALLOC_BYTES, 474 BLKDBG_CLUSTER_FREE, 475 476 BLKDBG_FLUSH_TO_OS, 477 BLKDBG_FLUSH_TO_DISK, 478 479 BLKDBG_EVENT_MAX, 480 } BlkDebugEvent; 481 482 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 483 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 484 485 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 486 const char *tag); 487 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 488 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 489 490 #endif 491