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 BlockDriver *bdrv_find_format(const char *format_name); 173 BlockDriver *bdrv_find_whitelisted_format(const char *format_name, 174 bool readonly); 175 int bdrv_create(BlockDriver *drv, const char* filename, 176 QemuOpts *opts, Error **errp); 177 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp); 178 BlockDriverState *bdrv_new_root(void); 179 BlockDriverState *bdrv_new(void); 180 void bdrv_make_anon(BlockDriverState *bs); 181 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old); 182 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); 183 int bdrv_parse_cache_flags(const char *mode, int *flags); 184 int bdrv_parse_discard_flags(const char *mode, int *flags); 185 int bdrv_open_image(BlockDriverState **pbs, const char *filename, 186 QDict *options, const char *bdref_key, int flags, 187 bool allow_none, Error **errp); 188 void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd); 189 int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp); 190 int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp); 191 int bdrv_open(BlockDriverState **pbs, const char *filename, 192 const char *reference, QDict *options, int flags, 193 BlockDriver *drv, Error **errp); 194 BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, 195 BlockDriverState *bs, int flags); 196 int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp); 197 int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp); 198 int bdrv_reopen_prepare(BDRVReopenState *reopen_state, 199 BlockReopenQueue *queue, Error **errp); 200 void bdrv_reopen_commit(BDRVReopenState *reopen_state); 201 void bdrv_reopen_abort(BDRVReopenState *reopen_state); 202 void bdrv_close(BlockDriverState *bs); 203 void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify); 204 int bdrv_read(BlockDriverState *bs, int64_t sector_num, 205 uint8_t *buf, int nb_sectors); 206 int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num, 207 uint8_t *buf, int nb_sectors); 208 int bdrv_write(BlockDriverState *bs, int64_t sector_num, 209 const uint8_t *buf, int nb_sectors); 210 int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num, 211 int nb_sectors, BdrvRequestFlags flags); 212 BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num, 213 int nb_sectors, BdrvRequestFlags flags, 214 BlockCompletionFunc *cb, void *opaque); 215 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags); 216 int bdrv_pread(BlockDriverState *bs, int64_t offset, 217 void *buf, int count); 218 int bdrv_pwrite(BlockDriverState *bs, int64_t offset, 219 const void *buf, int count); 220 int bdrv_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov); 221 int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, 222 const void *buf, int count); 223 int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, 224 int nb_sectors, QEMUIOVector *qiov); 225 int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs, 226 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); 227 int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, 228 int nb_sectors, QEMUIOVector *qiov); 229 /* 230 * Efficiently zero a region of the disk image. Note that this is a regular 231 * I/O request like read or write and should have a reasonable size. This 232 * function is not suitable for zeroing the entire image in a single request 233 * because it may allocate memory for the entire region. 234 */ 235 int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, 236 int nb_sectors, BdrvRequestFlags flags); 237 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, 238 const char *backing_file); 239 int bdrv_get_backing_file_depth(BlockDriverState *bs); 240 void bdrv_refresh_filename(BlockDriverState *bs); 241 int bdrv_truncate(BlockDriverState *bs, int64_t offset); 242 int64_t bdrv_nb_sectors(BlockDriverState *bs); 243 int64_t bdrv_getlength(BlockDriverState *bs); 244 int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); 245 void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); 246 void bdrv_refresh_limits(BlockDriverState *bs, Error **errp); 247 int bdrv_commit(BlockDriverState *bs); 248 int bdrv_commit_all(void); 249 int bdrv_change_backing_file(BlockDriverState *bs, 250 const char *backing_file, const char *backing_fmt); 251 void bdrv_register(BlockDriver *bdrv); 252 int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, 253 BlockDriverState *base, 254 const char *backing_file_str); 255 BlockDriverState *bdrv_find_overlay(BlockDriverState *active, 256 BlockDriverState *bs); 257 BlockDriverState *bdrv_find_base(BlockDriverState *bs); 258 259 260 typedef struct BdrvCheckResult { 261 int corruptions; 262 int leaks; 263 int check_errors; 264 int corruptions_fixed; 265 int leaks_fixed; 266 int64_t image_end_offset; 267 BlockFragInfo bfi; 268 } BdrvCheckResult; 269 270 typedef enum { 271 BDRV_FIX_LEAKS = 1, 272 BDRV_FIX_ERRORS = 2, 273 } BdrvCheckMode; 274 275 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix); 276 277 /* The units of offset and total_work_size may be chosen arbitrarily by the 278 * block driver; total_work_size may change during the course of the amendment 279 * operation */ 280 typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset, 281 int64_t total_work_size); 282 int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts, 283 BlockDriverAmendStatusCB *status_cb); 284 285 /* external snapshots */ 286 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs, 287 BlockDriverState *candidate); 288 bool bdrv_is_first_non_filter(BlockDriverState *candidate); 289 290 /* check if a named node can be replaced when doing drive-mirror */ 291 BlockDriverState *check_to_replace_node(const char *node_name, Error **errp); 292 293 /* async block I/O */ 294 typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, 295 int sector_num); 296 BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, 297 QEMUIOVector *iov, int nb_sectors, 298 BlockCompletionFunc *cb, void *opaque); 299 BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, 300 QEMUIOVector *iov, int nb_sectors, 301 BlockCompletionFunc *cb, void *opaque); 302 BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs, 303 BlockCompletionFunc *cb, void *opaque); 304 BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs, 305 int64_t sector_num, int nb_sectors, 306 BlockCompletionFunc *cb, void *opaque); 307 void bdrv_aio_cancel(BlockAIOCB *acb); 308 void bdrv_aio_cancel_async(BlockAIOCB *acb); 309 310 typedef struct BlockRequest { 311 /* Fields to be filled by multiwrite caller */ 312 int64_t sector; 313 int nb_sectors; 314 int flags; 315 QEMUIOVector *qiov; 316 BlockCompletionFunc *cb; 317 void *opaque; 318 319 /* Filled by multiwrite implementation */ 320 int error; 321 } BlockRequest; 322 323 int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, 324 int num_reqs); 325 326 /* sg packet commands */ 327 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); 328 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, 329 unsigned long int req, void *buf, 330 BlockCompletionFunc *cb, void *opaque); 331 332 /* Invalidate any cached metadata used by image formats */ 333 void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp); 334 void bdrv_invalidate_cache_all(Error **errp); 335 336 /* Ensure contents are flushed to disk. */ 337 int bdrv_flush(BlockDriverState *bs); 338 int coroutine_fn bdrv_co_flush(BlockDriverState *bs); 339 int bdrv_flush_all(void); 340 void bdrv_close_all(void); 341 void bdrv_drain(BlockDriverState *bs); 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 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base); 379 BlockDriverState *bdrv_next_node(BlockDriverState *bs); 380 BlockDriverState *bdrv_next(BlockDriverState *bs); 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 void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp); 385 int bdrv_query_missing_keys(void); 386 void bdrv_iterate_format(void (*it)(void *opaque, const char *name), 387 void *opaque); 388 const char *bdrv_get_node_name(const BlockDriverState *bs); 389 const char *bdrv_get_device_name(const BlockDriverState *bs); 390 int bdrv_get_flags(BlockDriverState *bs); 391 int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, 392 const uint8_t *buf, int nb_sectors); 393 int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); 394 ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs); 395 void bdrv_round_to_clusters(BlockDriverState *bs, 396 int64_t sector_num, int nb_sectors, 397 int64_t *cluster_sector_num, 398 int *cluster_nb_sectors); 399 400 const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 401 void bdrv_get_backing_filename(BlockDriverState *bs, 402 char *filename, int filename_size); 403 void bdrv_get_full_backing_filename(BlockDriverState *bs, 404 char *dest, size_t sz, Error **errp); 405 void bdrv_get_full_backing_filename_from_filename(const char *backed, 406 const char *backing, 407 char *dest, size_t sz, 408 Error **errp); 409 int bdrv_is_snapshot(BlockDriverState *bs); 410 411 int path_has_protocol(const char *path); 412 int path_is_absolute(const char *path); 413 void path_combine(char *dest, int dest_size, 414 const char *base_path, 415 const char *filename); 416 417 int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos); 418 int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, 419 int64_t pos, int size); 420 421 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, 422 int64_t pos, int size); 423 424 void bdrv_img_create(const char *filename, const char *fmt, 425 const char *base_filename, const char *base_fmt, 426 char *options, uint64_t img_size, int flags, 427 Error **errp, bool quiet); 428 429 /* Returns the alignment in bytes that is required so that no bounce buffer 430 * is required throughout the stack */ 431 size_t bdrv_opt_mem_align(BlockDriverState *bs); 432 void bdrv_set_guest_block_size(BlockDriverState *bs, int align); 433 void *qemu_blockalign(BlockDriverState *bs, size_t size); 434 void *qemu_blockalign0(BlockDriverState *bs, size_t size); 435 void *qemu_try_blockalign(BlockDriverState *bs, size_t size); 436 void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); 437 bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov); 438 439 struct HBitmapIter; 440 typedef struct BdrvDirtyBitmap BdrvDirtyBitmap; 441 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, 442 Error **errp); 443 void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 444 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs); 445 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector); 446 void bdrv_set_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 447 int64_t cur_sector, int nr_sectors); 448 void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, 449 int64_t cur_sector, int nr_sectors); 450 void bdrv_dirty_iter_init(BlockDriverState *bs, 451 BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); 452 int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); 453 454 void bdrv_enable_copy_on_read(BlockDriverState *bs); 455 void bdrv_disable_copy_on_read(BlockDriverState *bs); 456 457 void bdrv_ref(BlockDriverState *bs); 458 void bdrv_unref(BlockDriverState *bs); 459 460 bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp); 461 void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason); 462 void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason); 463 void bdrv_op_block_all(BlockDriverState *bs, Error *reason); 464 void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason); 465 bool bdrv_op_blocker_is_empty(BlockDriverState *bs); 466 467 typedef enum { 468 BLKDBG_L1_UPDATE, 469 470 BLKDBG_L1_GROW_ALLOC_TABLE, 471 BLKDBG_L1_GROW_WRITE_TABLE, 472 BLKDBG_L1_GROW_ACTIVATE_TABLE, 473 474 BLKDBG_L2_LOAD, 475 BLKDBG_L2_UPDATE, 476 BLKDBG_L2_UPDATE_COMPRESSED, 477 BLKDBG_L2_ALLOC_COW_READ, 478 BLKDBG_L2_ALLOC_WRITE, 479 480 BLKDBG_READ_AIO, 481 BLKDBG_READ_BACKING_AIO, 482 BLKDBG_READ_COMPRESSED, 483 484 BLKDBG_WRITE_AIO, 485 BLKDBG_WRITE_COMPRESSED, 486 487 BLKDBG_VMSTATE_LOAD, 488 BLKDBG_VMSTATE_SAVE, 489 490 BLKDBG_COW_READ, 491 BLKDBG_COW_WRITE, 492 493 BLKDBG_REFTABLE_LOAD, 494 BLKDBG_REFTABLE_GROW, 495 BLKDBG_REFTABLE_UPDATE, 496 497 BLKDBG_REFBLOCK_LOAD, 498 BLKDBG_REFBLOCK_UPDATE, 499 BLKDBG_REFBLOCK_UPDATE_PART, 500 BLKDBG_REFBLOCK_ALLOC, 501 BLKDBG_REFBLOCK_ALLOC_HOOKUP, 502 BLKDBG_REFBLOCK_ALLOC_WRITE, 503 BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, 504 BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, 505 BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, 506 507 BLKDBG_CLUSTER_ALLOC, 508 BLKDBG_CLUSTER_ALLOC_BYTES, 509 BLKDBG_CLUSTER_FREE, 510 511 BLKDBG_FLUSH_TO_OS, 512 BLKDBG_FLUSH_TO_DISK, 513 514 BLKDBG_PWRITEV_RMW_HEAD, 515 BLKDBG_PWRITEV_RMW_AFTER_HEAD, 516 BLKDBG_PWRITEV_RMW_TAIL, 517 BLKDBG_PWRITEV_RMW_AFTER_TAIL, 518 BLKDBG_PWRITEV, 519 BLKDBG_PWRITEV_ZERO, 520 BLKDBG_PWRITEV_DONE, 521 522 BLKDBG_EMPTY_IMAGE_PREPARE, 523 524 BLKDBG_EVENT_MAX, 525 } BlkDebugEvent; 526 527 #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) 528 void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); 529 530 int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event, 531 const char *tag); 532 int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag); 533 int bdrv_debug_resume(BlockDriverState *bs, const char *tag); 534 bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); 535 536 /** 537 * bdrv_get_aio_context: 538 * 539 * Returns: the currently bound #AioContext 540 */ 541 AioContext *bdrv_get_aio_context(BlockDriverState *bs); 542 543 /** 544 * bdrv_set_aio_context: 545 * 546 * Changes the #AioContext used for fd handlers, timers, and BHs by this 547 * BlockDriverState and all its children. 548 * 549 * This function must be called from the old #AioContext or with a lock held so 550 * the old #AioContext is not executing. 551 */ 552 void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context); 553 554 void bdrv_io_plug(BlockDriverState *bs); 555 void bdrv_io_unplug(BlockDriverState *bs); 556 void bdrv_flush_io_queue(BlockDriverState *bs); 557 558 BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); 559 560 #endif 561