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 "block/accounting.h" 9 #include "qapi/qmp/qobject.h" 10 #include "qapi-types.h" 11 12 /* block.c */ 13 typedef struct BlockDriver BlockDriver; 14 typedef struct BlockJob BlockJob; 15 16 typedef struct BlockDriverInfo { 17 /* in bytes, 0 if irrelevant */ 18 int cluster_size; 19 /* offset at which the VM state can be saved (0 if not possible) */ 20 int64_t vm_state_offset; 21 bool is_dirty; 22 /* 23 * True if unallocated blocks read back as zeroes. This is equivalent 24 * to the the LBPRZ flag in the SCSI logical block provisioning page. 25 */ 26 bool unallocated_blocks_are_zero; 27 /* 28 * True if the driver can optimize writing zeroes by unmapping 29 * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux 30 * with the difference that in qemu a discard is allowed to silently 31 * fail. Therefore we have to use bdrv_write_zeroes with the 32 * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping. 33 * After this call the driver has to guarantee that the contents read 34 * back as zero. It is additionally required that the block device is 35 * opened with BDRV_O_UNMAP flag for this to work. 36 */ 37 bool can_write_zeroes_with_unmap; 38 /* 39 * True if this block driver only supports compressed writes 40 */ 41 bool needs_compressed_writes; 42 } BlockDriverInfo; 43 44 typedef struct BlockFragInfo { 45 uint64_t allocated_clusters; 46 uint64_t total_clusters; 47 uint64_t fragmented_clusters; 48 uint64_t compressed_clusters; 49 } BlockFragInfo; 50 51 typedef enum { 52 BDRV_REQ_COPY_ON_READ = 0x1, 53 BDRV_REQ_ZERO_WRITE = 0x2, 54 /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver 55 * is allowed to optimize a write zeroes request by unmapping (discarding) 56 * blocks if it is guaranteed that the result will read back as 57 * zeroes. The flag is only passed to the driver if the block device is 58 * opened with BDRV_O_UNMAP. 59 */ 60 BDRV_REQ_MAY_UNMAP = 0x4, 61 } BdrvRequestFlags; 62 63 #define BDRV_O_RDWR 0x0002 64 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ 65 #define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */ 66 #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ 67 #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ 68 #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ 69 #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ 70 #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ 71 #define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ 72 #define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ 73 #define BDRV_O_CHECK 0x1000 /* open solely for consistency check */ 74 #define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */ 75 #define BDRV_O_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */ 76 #define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given: 77 select an appropriate protocol driver, 78 ignoring the format layer */ 79 80 #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) 81 82 #define BDRV_SECTOR_BITS 9 83 #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) 84 #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) 85 86 #define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \ 87 INT_MAX >> BDRV_SECTOR_BITS) 88 89 /* 90 * Allocation status flags 91 * BDRV_BLOCK_DATA: data is read from bs->file or another file 92 * BDRV_BLOCK_ZERO: sectors read as zero 93 * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data 94 * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this 95 * layer (as opposed to the backing file) 96 * BDRV_BLOCK_RAW: used internally to indicate that the request 97 * was answered by the raw driver and that one 98 * should look in bs->file directly. 99 * 100 * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in 101 * bs->file where sector data can be read from as raw data. 102 * 103 * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present. 104 * 105 * DATA ZERO OFFSET_VALID 106 * t t t sectors read as zero, bs->file is zero at offset 107 * t f t sectors read as valid from bs->file at offset 108 * f t t sectors preallocated, read as zero, bs->file not 109 * necessarily zero at offset 110 * f f t sectors preallocated but read from backing_hd, 111 * bs->file contains garbage at offset 112 * t t f sectors preallocated, read as zero, unknown offset 113 * t f f sectors read from unknown file or offset 114 * f t f not allocated or unknown offset, read as zero 115 * f f f not allocated or unknown offset, read from backing_hd 116 */ 117 #define BDRV_BLOCK_DATA 0x01 118 #define BDRV_BLOCK_ZERO 0x02 119 #define BDRV_BLOCK_OFFSET_VALID 0x04 120 #define BDRV_BLOCK_RAW 0x08 121 #define BDRV_BLOCK_ALLOCATED 0x10 122 #define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK 123 124 typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue; 125 126 typedef struct BDRVReopenState { 127 BlockDriverState *bs; 128 int flags; 129 void *opaque; 130 } BDRVReopenState; 131 132 /* 133 * Block operation types 134 */ 135 typedef enum BlockOpType { 136 BLOCK_OP_TYPE_BACKUP_SOURCE, 137 BLOCK_OP_TYPE_BACKUP_TARGET, 138 BLOCK_OP_TYPE_CHANGE, 139 BLOCK_OP_TYPE_COMMIT_SOURCE, 140 BLOCK_OP_TYPE_COMMIT_TARGET, 141 BLOCK_OP_TYPE_DATAPLANE, 142 BLOCK_OP_TYPE_DRIVE_DEL, 143 BLOCK_OP_TYPE_EJECT, 144 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, 145 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, 146 BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, 147 BLOCK_OP_TYPE_MIRROR, 148 BLOCK_OP_TYPE_RESIZE, 149 BLOCK_OP_TYPE_STREAM, 150 BLOCK_OP_TYPE_REPLACE, 151 BLOCK_OP_TYPE_MAX, 152 } BlockOpType; 153 154 void bdrv_iostatus_enable(BlockDriverState *bs); 155 void bdrv_iostatus_reset(BlockDriverState *bs); 156 void bdrv_iostatus_disable(BlockDriverState *bs); 157 bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); 158 void bdrv_iostatus_set_err(BlockDriverState *bs, int error); 159 void bdrv_info_print(Monitor *mon, const QObject *data); 160 void bdrv_info(Monitor *mon, QObject **ret_data); 161 void bdrv_stats_print(Monitor *mon, const QObject *data); 162 void bdrv_info_stats(Monitor *mon, QObject **ret_data); 163 164 /* disk I/O throttling */ 165 void bdrv_io_limits_enable(BlockDriverState *bs); 166 void bdrv_io_limits_disable(BlockDriverState *bs); 167 168 void bdrv_init(void); 169 void bdrv_init_with_whitelist(void); 170 BlockDriver *bdrv_find_protocol(const char *filename, 171 bool allow_protocol_prefix, 172 Error **errp); 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 QemuOpts *opts, Error **errp); 178 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 179 BlockDriverState *bdrv_new_root(void); 180 BlockDriverState *bdrv_new(void); 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_open_image(BlockDriverState **pbs, const char *filename, 187 QDict *options, const char *bdref_key, int flags, 188 bool allow_none, Error **errp); 189 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 190 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 191 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 192 int bdrv_open(BlockDriverState **pbs, const char *filename, 193 const char *reference, QDict *options, int flags, 194 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_read(BlockDriverState *bs, int64_t sector_num, 206 uint8_t *buf, int nb_sectors); 207 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 208 uint8_t *buf, int nb_sectors); 209 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 210 const uint8_t *buf, int nb_sectors); 211 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 212 int nb_sectors, BdrvRequestFlags flags); 213 BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 214 int nb_sectors, BdrvRequestFlags flags, 215 BlockCompletionFunc *cb, void *opaque); 216 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 217 int bdrv_pread(BlockDriverState *bs, int64_t offset, 218 void *buf, int count); 219 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 220 const void *buf, int count); 221 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 222 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 223 const void *buf, int count); 224 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 225 int nb_sectors, QEMUIOVector *qiov); 226 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 227 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 228 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 229 int nb_sectors, QEMUIOVector *qiov); 230 /* 231 * Efficiently zero a region of the disk image. Note that this is a regular 232 * I/O request like read or write and should have a reasonable size. This 233 * function is not suitable for zeroing the entire image in a single request 234 * because it may allocate memory for the entire region. 235 */ 236 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 237 int nb_sectors, BdrvRequestFlags flags); 238 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 239 const char *backing_file); 240 int bdrv_get_backing_file_depth(BlockDriverState *bs); 241 void bdrv_refresh_filename(BlockDriverState *bs); 242 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 243 int64_t bdrv_nb_sectors(BlockDriverState *bs); 244 int64_t bdrv_getlength(BlockDriverState *bs); 245 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 246 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 247 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 248 int bdrv_commit(BlockDriverState *bs); 249 int bdrv_commit_all(void); 250 int bdrv_change_backing_file(BlockDriverState *bs, 251 const char *backing_file, const char *backing_fmt); 252 void bdrv_register(BlockDriver *bdrv); 253 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 254 BlockDriverState *base, 255 const char *backing_file_str); 256 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 257 BlockDriverState *bs); 258 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 259 260 261 typedef struct BdrvCheckResult { 262 int corruptions; 263 int leaks; 264 int check_errors; 265 int corruptions_fixed; 266 int leaks_fixed; 267 int64_t image_end_offset; 268 BlockFragInfo bfi; 269 } BdrvCheckResult; 270 271 typedef enum { 272 BDRV_FIX_LEAKS = 1, 273 BDRV_FIX_ERRORS = 2, 274 } BdrvCheckMode; 275 276 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 277 278 /* The units of offset and total_work_size may be chosen arbitrarily by the 279 * block driver; total_work_size may change during the course of the amendment 280 * operation */ 281 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 282 int64_t total_work_size); 283 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 284 BlockDriverAmendStatusCB *status_cb); 285 286 /* external snapshots */ 287 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 288 BlockDriverState *candidate); 289 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 290 291 /* check if a named node can be replaced when doing drive-mirror */ 292 BlockDriverState *check_to_replace_node(const char *node_name, Error **errp); 293 294 /* async block I/O */ 295 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 296 int sector_num); 297 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 298 QEMUIOVector *iov, int nb_sectors, 299 BlockCompletionFunc *cb, void *opaque); 300 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 301 QEMUIOVector *iov, int nb_sectors, 302 BlockCompletionFunc *cb, void *opaque); 303 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 304 BlockCompletionFunc *cb, void *opaque); 305 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 306 int64_t sector_num, int nb_sectors, 307 BlockCompletionFunc *cb, void *opaque); 308 void bdrv_aio_cancel(BlockAIOCB *acb); 309 void bdrv_aio_cancel_async(BlockAIOCB *acb); 310 311 typedef struct BlockRequest { 312 /* Fields to be filled by multiwrite caller */ 313 int64_t sector; 314 int nb_sectors; 315 int flags; 316 QEMUIOVector *qiov; 317 BlockCompletionFunc *cb; 318 void *opaque; 319 320 /* Filled by multiwrite implementation */ 321 int error; 322 } BlockRequest; 323 324 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 325 int num_reqs); 326 327 /* sg packet commands */ 328 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 329 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 330 unsigned long int req, void *buf, 331 BlockCompletionFunc *cb, void *opaque); 332 333 /* Invalidate any cached metadata used by image formats */ 334 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 335 void bdrv_invalidate_cache_all(Error **errp); 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(BlockDriverState *bs); 343 void bdrv_drain_all(void); 344 345 int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 346 int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); 347 int bdrv_has_zero_init_1(BlockDriverState *bs); 348 int bdrv_has_zero_init(BlockDriverState *bs); 349 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); 350 bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); 351 int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, 352 int nb_sectors, int *pnum); 353 int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, 354 int *pnum); 355 int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, 356 int64_t sector_num, int nb_sectors, int *pnum); 357 358 void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error, 359 BlockdevOnError on_write_error); 360 BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read); 361 BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error); 362 void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action, 363 bool is_read, int error); 364 int bdrv_is_read_only(BlockDriverState *bs); 365 int bdrv_is_sg(BlockDriverState *bs); 366 int bdrv_enable_write_cache(BlockDriverState *bs); 367 void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); 368 int bdrv_is_inserted(BlockDriverState *bs); 369 int bdrv_media_changed(BlockDriverState *bs); 370 void bdrv_lock_medium(BlockDriverState *bs, bool locked); 371 void bdrv_eject(BlockDriverState *bs, bool eject_flag); 372 const char *bdrv_get_format_name(BlockDriverState *bs); 373 BlockDriverState *bdrv_find(const char *name); 374 BlockDriverState *bdrv_find_node(const char *node_name); 375 BlockDeviceInfoList *bdrv_named_nodes_list(void); 376 BlockDriverState *bdrv_lookup_bs(const char *device, 377 const char *node_name, 378 Error **errp); 379 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 380 BlockDriverState *bdrv_next_node(BlockDriverState *bs); 381 BlockDriverState *bdrv_next(BlockDriverState *bs); 382 int bdrv_is_encrypted(BlockDriverState *bs); 383 int bdrv_key_required(BlockDriverState *bs); 384 int bdrv_set_key(BlockDriverState *bs, const char *key); 385 void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); 386 int bdrv_query_missing_keys(void); 387 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 388 void *opaque); 389 const char *bdrv_get_node_name(const BlockDriverState *bs); 390 const char *bdrv_get_device_name(const BlockDriverState *bs); 391 int bdrv_get_flags(BlockDriverState *bs); 392 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 393 const uint8_t *buf, int nb_sectors); 394 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 395 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 396 void bdrv_round_to_clusters(BlockDriverState *bs, 397 int64_t sector_num, int nb_sectors, 398 int64_t *cluster_sector_num, 399 int *cluster_nb_sectors); 400 401 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 402 void bdrv_get_backing_filename(BlockDriverState *bs, 403 char *filename, int filename_size); 404 void bdrv_get_full_backing_filename(BlockDriverState *bs, 405 char *dest, size_t sz, Error **errp); 406 void bdrv_get_full_backing_filename_from_filename(const char *backed, 407 const char *backing, 408 char *dest, size_t sz, 409 Error **errp); 410 int bdrv_is_snapshot(BlockDriverState *bs); 411 412 int path_has_protocol(const char *path); 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 void *qemu_blockalign0(BlockDriverState *bs, size_t size); 436 void *qemu_try_blockalign(BlockDriverState *bs, size_t size); 437 void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); 438 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 439 440 struct HBitmapIter; 441 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 442 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, 443 Error **errp); 444 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 445 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 446 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 447 void bdrv_set_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 448 int64_t cur_sector, int nr_sectors); 449 void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 450 int64_t cur_sector, int nr_sectors); 451 void bdrv_dirty_iter_init(BlockDriverState *bs, 452 BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 453 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 454 455 void bdrv_enable_copy_on_read(BlockDriverState *bs); 456 void bdrv_disable_copy_on_read(BlockDriverState *bs); 457 458 void bdrv_ref(BlockDriverState *bs); 459 void bdrv_unref(BlockDriverState *bs); 460 461 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 462 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 463 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 464 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 465 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 466 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 467 468 typedef enum { 469 BLKDBG_L1_UPDATE, 470 471 BLKDBG_L1_GROW_ALLOC_TABLE, 472 BLKDBG_L1_GROW_WRITE_TABLE, 473 BLKDBG_L1_GROW_ACTIVATE_TABLE, 474 475 BLKDBG_L2_LOAD, 476 BLKDBG_L2_UPDATE, 477 BLKDBG_L2_UPDATE_COMPRESSED, 478 BLKDBG_L2_ALLOC_COW_READ, 479 BLKDBG_L2_ALLOC_WRITE, 480 481 BLKDBG_READ_AIO, 482 BLKDBG_READ_BACKING_AIO, 483 BLKDBG_READ_COMPRESSED, 484 485 BLKDBG_WRITE_AIO, 486 BLKDBG_WRITE_COMPRESSED, 487 488 BLKDBG_VMSTATE_LOAD, 489 BLKDBG_VMSTATE_SAVE, 490 491 BLKDBG_COW_READ, 492 BLKDBG_COW_WRITE, 493 494 BLKDBG_REFTABLE_LOAD, 495 BLKDBG_REFTABLE_GROW, 496 BLKDBG_REFTABLE_UPDATE, 497 498 BLKDBG_REFBLOCK_LOAD, 499 BLKDBG_REFBLOCK_UPDATE, 500 BLKDBG_REFBLOCK_UPDATE_PART, 501 BLKDBG_REFBLOCK_ALLOC, 502 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 503 BLKDBG_REFBLOCK_ALLOC_WRITE, 504 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 505 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 506 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 507 508 BLKDBG_CLUSTER_ALLOC, 509 BLKDBG_CLUSTER_ALLOC_BYTES, 510 BLKDBG_CLUSTER_FREE, 511 512 BLKDBG_FLUSH_TO_OS, 513 BLKDBG_FLUSH_TO_DISK, 514 515 BLKDBG_PWRITEV_RMW_HEAD, 516 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 517 BLKDBG_PWRITEV_RMW_TAIL, 518 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 519 BLKDBG_PWRITEV, 520 BLKDBG_PWRITEV_ZERO, 521 BLKDBG_PWRITEV_DONE, 522 523 BLKDBG_EMPTY_IMAGE_PREPARE, 524 525 BLKDBG_EVENT_MAX, 526 } BlkDebugEvent; 527 528 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 529 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 530 531 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 532 const char *tag); 533 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 534 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 535 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 536 537 /** 538 * bdrv_get_aio_context: 539 * 540 * Returns: the currently bound #AioContext 541 */ 542 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 543 544 /** 545 * bdrv_set_aio_context: 546 * 547 * Changes the #AioContext used for fd handlers, timers, and BHs by this 548 * BlockDriverState and all its children. 549 * 550 * This function must be called from the old #AioContext or with a lock held so 551 * the old #AioContext is not executing. 552 */ 553 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 554 555 void bdrv_io_plug(BlockDriverState *bs); 556 void bdrv_io_unplug(BlockDriverState *bs); 557 void bdrv_flush_io_queue(BlockDriverState *bs); 558 559 BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); 560 561 #endif 562